{"61616":{"#nid":"61616","#data":{"type":"event","title":"STAT SEMINAR :: Manifold Based Dimension Reduction and Statistical Properties","body":[{"value":"\u003Cp\u003EManifold learning has attracted a lot of attention in both machine learning and statistics  communities. I will give an overview and present many interesting applications. An appealing feature of many manifold learning algorithms is that their solutions correspond to linear invariant subspaces. Hence mathematical analysis can be implemented on the behavior of their solutions in a relatively common framework. I will describe some recent results regarding the worst case performance of manifold learning algorithms under additive noises.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR :: Manifold Based Dimension Reduction and Statistical Properties","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR :: Manifold Based Dimension Reduction and Statistical Properties"}],"uid":"27279","created_gmt":"2010-10-08 11:36:06","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-30T10:00:00-05:00","event_time_end":"2006-03-29T23:00:00-05:00","event_time_end_last":"2006-03-29T23:00:00-05:00","gmt_time_start":"2006-03-30 15:00:00","gmt_time_end":"2006-03-30 04:00:00","gmt_time_end_last":"2006-03-30 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61638":{"#nid":"61638","#data":{"type":"event","title":"A Bilevel Approach to Optimal Pricing","body":[{"value":"\u003Cp\u003EWhereas pricing models have in the past often been approached from a purely academic standpoint, optimal pricing is nowadays considered as a central financial and operational tool in several industries. The optimal pricing problem, involving two decision makers acting non cooperatively and in a sequential way, can be adequately modelled as a bilevel program In this presentation we give a theoretical and algorithmic study of this class of bilevel problems, devoting a special attention to the problem of setting profit maximizing tariffs on a transportation network.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"A Bilevel Approach to Optimal Pricing","format":"limited_html"}],"field_summary_sentence":[{"value":"A Bilevel Approach to Optimal Pricing"}],"uid":"27279","created_gmt":"2010-10-08 11:36:43","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-30T11:00:00-05:00","event_time_end":"2006-03-29T23:00:00-05:00","event_time_end_last":"2006-03-29T23:00:00-05:00","gmt_time_start":"2006-03-30 16:00:00","gmt_time_end":"2006-03-30 04:00:00","gmt_time_end_last":"2006-03-30 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61632":{"#nid":"61632","#data":{"type":"event","title":"Faculty Meeting","body":[{"value":"\u003Cp\u003EAgenda to be forwarded via e-mail.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-04T12:00:00-04:00","event_time_end":"2006-04-04T01:00:00-04:00","event_time_end_last":"2006-04-04T01:00:00-04:00","gmt_time_start":"2006-04-04 16:00:00","gmt_time_end":"2006-04-04 05:00:00","gmt_time_end_last":"2006-04-04 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61612":{"#nid":"61612","#data":{"type":"event","title":"STAT SEMINAR SERIES :: Gene number estimation and gene capture prediction in EST sequencing","body":[{"value":"\u003Cp\u003EIn expressed sequence tag (EST) sequencing, we are often interested in how many genes we can capture in an EST sample of a targeted size. This information  provides insights to sequencing efficiency in experimental design, as well as  clues to the diversity of expressed genes in the tissue from which the library  was constructed. We propose a compound Poisson process model that can accurately predict the gene capture in a future EST sample based on an initial EST sample.  It also allows estimation of the number of expressed genes in one cDNA library  or co-expressed in two cDNA libraries. The superior performance of the new  prediction method over an existing approach is established by a simulation study.  Our analysis of four Arabidopsis thaliana EST sets suggests that the number of expressed genes present in four different cDNA libraries of Arabidopsis thaliana varies from 9155 (root) to 12005 (silique). An observed fraction of co-expressed  genes in two different EST sets as low as 25% can correspond to an actual overlap  fraction greater than 65%.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR SERIES :: Gene number estimation and gene capture prediction in EST sequencing","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR SERIES :: Gene number estimation and gene capture prediction in EST sequencing"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-04T13:30:00-04:00","event_time_end":"2006-04-04T01:00:00-04:00","event_time_end_last":"2006-04-04T01:00:00-04:00","gmt_time_start":"2006-04-04 17:30:00","gmt_time_end":"2006-04-04 05:00:00","gmt_time_end_last":"2006-04-04 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61640":{"#nid":"61640","#data":{"type":"event","title":"Design and Evaluation of Long-Term Supply Contracts in the Presence of Spot Market","body":[{"value":"\u003Cp\u003EWe consider a make-to-stock (MTS) manufacturing system that\u003Cbr \/\u003E\nproduces a single product that can be sold not only in a spot\u003Cbr \/\u003E\nmarket but also through a long-term supply contractual channel,\u003Cbr \/\u003E\nsuch as the OEM contract. A typical example of the spot market is\u003Cbr \/\u003E\na B2B online commodity market. The price in the spot market is\u003Cbr \/\u003E\nrandom, and evolves as a continuous-time Markov chain. The demand\u003Cbr \/\u003E\nin the spot market comes in the arrivals of a Markov Modulated\u003Cbr \/\u003E\nPoisson Process (MMPP), and can be rejected or accepted by instant\u003Cbr \/\u003E\nor delayed fulfillment. However, price in the contractual channel\u003Cbr \/\u003E\nis pre-specified and demand in the contractual channel comes at a\u003Cbr \/\u003E\nhomogeneous Poisson process with a committed constant arrival\u003Cbr \/\u003E\nrate. The system is obligate to fulfill contract orders. In this\u003Cbr \/\u003E\nsetting,  the coordination of production and spot sales arises to\u003Cbr \/\u003E\nbe a core of decisions and is proven to be optimized by a simple\u003Cbr \/\u003E\nand intuitively structured threshold policy under a long-run\u003Cbr \/\u003E\naverage profit criterion. In particular, the optimal policy\u003Cbr \/\u003E\nconsists of spot-dependent base-stock and sale\u003Cbr \/\u003E\nadmission thresholds. Then, we show how a contract should be\u003Cbr \/\u003E\nevaluated and designed while bargaining with the contractual\u003Cbr \/\u003E\npartner. Finally, we unveil that the manufacturer and the partner\u003Cbr \/\u003E\ncan reach an economic Nash equilibrium point to strike a deal.  An\u003Cbr \/\u003E\neffective algorithm is proposed for computing optimal threshold\u003Cbr \/\u003E\ncontrol and Nash equilibrium point.\n\u003C\/p\u003E\n\u003Cp\u003E(joint work with: Zhan Pang)\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Design and Evaluation of Long-Term Supply Contracts in the Presence of Spot Market","format":"limited_html"}],"field_summary_sentence":[{"value":"Design and Evaluation of Long-Term Supply Contracts in the Presence of Spot Market"}],"uid":"27279","created_gmt":"2010-10-08 11:36:43","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-09T10:00:00-05:00","event_time_end":"2006-01-08T23:00:00-05:00","event_time_end_last":"2006-01-08T23:00:00-05:00","gmt_time_start":"2006-01-09 15:00:00","gmt_time_end":"2006-01-09 04:00:00","gmt_time_end_last":"2006-01-09 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61610":{"#nid":"61610","#data":{"type":"event","title":"STAT SEMINAR SERIES :: Two-treatment crossover designs","body":[{"value":"\u003Cp\u003ECrossover designs are useful and popular for certain experiments in a variety of fields, including in the pharmaceutical industry. In some applications they enjoy important advantages over parallel trials, but they also induce a number of potential problems not faced with parallel trials. The possible presence of carryover effects is one of these.\n\u003C\/p\u003E\n\u003Cp\u003EPartly as a result of this, a number of different models have been considered for analyzing data from a crossover design. In this talk we will focus on the optimal design question. Thus, given that we want to use a certain model, what is a good design to use? We will restrict our attention to the situation that only two treatments are to be compared in the experiment.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR SERIES :: Two-treatment crossover designs","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR SERIES :: Two-treatment crossover designs"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-06T12:00:00-04:00","event_time_end":"2006-04-06T01:00:00-04:00","event_time_end_last":"2006-04-06T01:00:00-04:00","gmt_time_start":"2006-04-06 16:00:00","gmt_time_end":"2006-04-06 05:00:00","gmt_time_end_last":"2006-04-06 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61639":{"#nid":"61639","#data":{"type":"event","title":"Logistics in a Challenging Environment","body":"","field_subtitle":"","field_summary":[{"value":"Logistics in a Challenging Environment","format":"limited_html"}],"field_summary_sentence":[{"value":"Logistics in a Challenging Environment"}],"uid":"27279","created_gmt":"2010-10-08 11:36:43","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-12T12:00:00-05:00","event_time_end":"2006-01-11T23:00:00-05:00","event_time_end_last":"2006-01-11T23:00:00-05:00","gmt_time_start":"2006-01-12 17:00:00","gmt_time_end":"2006-01-12 04:00:00","gmt_time_end_last":"2006-01-12 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61609":{"#nid":"61609","#data":{"type":"event","title":"Distinguished Lecture - Realizing 21st Century Logistics in the Department of Defense","body":[{"value":"\u003Cp\u003EDr. Gansler will cover the needs, the cuurent challenges, provide examples of success, and the future steps required.  He will bring in results from recent  Defense Science Board studies as well as his personal experience as Under Secretary of Defense where he was responsible for Acquisition, Technology and Logistics\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Distinguished Lecture - Realizing 21st Century Logistics in the Department of Defense","format":"limited_html"}],"field_summary_sentence":[{"value":"Distinguished Lecture - Realizing 21st Century Logistics in the Department of Defense"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-07T14:30:00-04:00","event_time_end":"2006-04-07T01:00:00-04:00","event_time_end_last":"2006-04-07T01:00:00-04:00","gmt_time_start":"2006-04-07 18:30:00","gmt_time_end":"2006-04-07 05:00:00","gmt_time_end_last":"2006-04-07 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61647":{"#nid":"61647","#data":{"type":"event","title":"ISyE Seminar Series :: Relaxations of Weakly Coupled Stochastic Dynamic Programs (work with Dan Adelman)","body":[{"value":"\u003Cp\u003EWe consider a class of stochastic dynamic programming problems that are amenable to relaxation via decomposition. We compare two techniques under an additively separable value function approximation, namely Lagrangian relaxation and the linear programming (LP) approach to approximate dynamic programming. We prove that the linear programming-based approximate dynamic programming method achieves tighter bounds than the Lagrangian relaxation. We also investigate the gap between the two bounds, proving conditions under which both are tight, and providing an example in which the gap may be arbitrarily large. Algorithmically, we show how the computationally more complex LP can be solved using column generation. Computational results on several sets of problem instances show that the LP-based method results in better policies, and that the differences in the bounds depend on the nature of the underlying constraints being relaxed. We consider a class of stochastic dynamic programming problems that are amenable to relaxation via decomposition. We compare two techniques under an additively separable value function approximation, namely Lagrangian relaxation and the linear programming (LP) approach to approximate dynamic programming. We prove that the linear programming-based approximate dynamic programming method achieves tighter bounds than the Lagrangian relaxation. We also investigate the gap between the two bounds, proving conditions under which both are tight, and providing an example in which the gap may be arbitrarily large. Algorithmically, we show how the computationally more complex LP can be solved using column generation. Computational results on several sets of problem instances show that the LP-based method results in better policies, and that the differences in the bounds depend on the nature of the underlying constraints being relaxed. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Seminar Series :: Relaxations of Weakly Coupled Stochastic Dynamic Programs (work with Dan Adelman)","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Seminar Series :: Relaxations of Weakly Coupled Stochastic Dynamic Programs (work with Dan Adelman)"}],"uid":"27279","created_gmt":"2010-10-08 11:37:49","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-19T10:00:00-05:00","event_time_end":"2006-01-18T23:00:00-05:00","event_time_end_last":"2006-01-18T23:00:00-05:00","gmt_time_start":"2006-01-19 15:00:00","gmt_time_end":"2006-01-19 04:00:00","gmt_time_end_last":"2006-01-19 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61606":{"#nid":"61606","#data":{"type":"event","title":"Process and Outcome Factors of Enterprise Transformation: A study of the retail sector","body":"","field_subtitle":"","field_summary":[{"value":"Process and Outcome Factors of Enterprise Transformation: A study of the retail sector","format":"limited_html"}],"field_summary_sentence":[{"value":"Process and Outcome Factors of Enterprise Transformation: A study of the retail sector"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-11T11:00:00-04:00","event_time_end":"2006-04-11T01:00:00-04:00","event_time_end_last":"2006-04-11T01:00:00-04:00","gmt_time_start":"2006-04-11 15:00:00","gmt_time_end":"2006-04-11 05:00:00","gmt_time_end_last":"2006-04-11 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61651":{"#nid":"61651","#data":{"type":"event","title":"ISyE Seminar Series : Safeguarding in Optimization Under Uncertainty","body":[{"value":"\u003Cp\u003EDecisions often need to be made before all the facts are in.  A facility must be built to withstand storms, floods, or earthquakes of magnitudes\u003Cbr \/\u003E\nthat can only be guessed at.  A portfolio must be purchased in the face of only statistical knowledge, at best, about how markets will perform.\u003Cbr \/\u003E\nIn optimization, this implies that constraints may need to be envisioned in terms of safety margins instead of exact requirements.  But what does\u003Cbr \/\u003E\nthat really mean in model formulation, and what are the consequences for\u003Cbr \/\u003E\noptimization structure and computation?\n\u003C\/p\u003E\n\u003Cp\u003ECommon approaches to a risky environment include worst-case analysis\u003Cbr \/\u003E\nand the reduction of uncertain quantities to their expectations.  Another\u003Cbr \/\u003E\nidea with traditional appeal is that of a chance constraint, where for\u003Cbr \/\u003E\ninstance one gives up on requiring a barrier along a river to hold back\u003Cbr \/\u003E\nthe water absolutely and settles for 99.9% assurance.  Unfortunately,\u003Cbr \/\u003E\nsuch strategies can lead to many technical difficulties, including\u003Cbr \/\u003E\nnonconvexity or even constraint infeasibility.  Nowadays, however,\u003Cbr \/\u003E\nnewer techniques are available which avoid such troubles and arguably\u003Cbr \/\u003E\ndo a much better job anyway at capturing the essence of the situation\u003Cbr \/\u003E\nwhile greatly enhancing numerical capabilities.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Seminar Series : Safeguarding in Optimization Under Uncertainty","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Seminar Series : Safeguarding in Optimization Under Uncertainty"}],"uid":"27279","created_gmt":"2010-10-08 11:37:50","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-20T10:00:00-05:00","event_time_end":"2006-01-19T23:00:00-05:00","event_time_end_last":"2006-01-19T23:00:00-05:00","gmt_time_start":"2006-01-20 15:00:00","gmt_time_end":"2006-01-20 04:00:00","gmt_time_end_last":"2006-01-20 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61605":{"#nid":"61605","#data":{"type":"event","title":"Planning Container Drayage Operations at Congested Seaports","body":[{"value":"\u003Cp\u003EThis dissertation considers daily operations management for a fleet of trucks providing container pickup and delivery service to a port. Truck congestion at access points for ports may lead to serious inefficiencies in drayage operations, and the resultant cost impact to the intermodal supply chain can be significant. Recognizing that port congestion is likely to continue to be a major problem for drayage operations given the growing volume of international containerized trade, this research seeks to develop optimization approaches for maximizing the productivity of drayage firms operating at congested seaports.  Specifically, this dissertation addresses two daily drayage routing and scheduling problems - drayage routing and scheduling problems that incorporate known time-dependent waiting time for port access; and drayage routing and scheduling problems with port access time slot capacities.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Planning Container Drayage Operations at Congested Seaports","format":"limited_html"}],"field_summary_sentence":[{"value":"Planning Container Drayage Operations at Congested Seaports"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-13T10:30:00-04:00","event_time_end":"2006-04-13T01:00:00-04:00","event_time_end_last":"2006-04-13T01:00:00-04:00","gmt_time_start":"2006-04-13 14:30:00","gmt_time_end":"2006-04-13 05:00:00","gmt_time_end_last":"2006-04-13 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61635":{"#nid":"61635","#data":{"type":"event","title":"Natural gas value chain optimization using stochastic integer programming","body":[{"value":"\u003Cp\u003EWe will present a value chain management model for liberalized natural gas markets. The model describes the integrated planning problem of a natural gas producer including production, transportation, storage and contract management. The decision horizon is normally between 18 months and three years. The capacities of the production fields and the transportation pipeline system limits the gas volumes delivered in the downstream markets. Demand is represented by contracts and spot markets. Contract volumes as well as spot prices are uncertain. The model is implemented as a mixed integer multistage stochastic model. Scenario trees are generated by moment matching. Preliminary results from pilot tests on Statoil\u0027s operations on the Norwegian continental shelf will be presented.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Natural gas value chain optimization using stochastic integer programming","format":"limited_html"}],"field_summary_sentence":[{"value":"Natural gas value chain optimization using stochastic integer programming"}],"uid":"27279","created_gmt":"2010-10-08 11:36:09","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-24T10:00:00-05:00","event_time_end":"2006-01-23T23:00:00-05:00","event_time_end_last":"2006-01-23T23:00:00-05:00","gmt_time_start":"2006-01-24 15:00:00","gmt_time_end":"2006-01-24 04:00:00","gmt_time_end_last":"2006-01-24 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61608":{"#nid":"61608","#data":{"type":"event","title":"STAT SEMINAR SERIES :: Fourier Methods for Sufficient Dimension Reduction in Regression","body":[{"value":"\u003Cp\u003EIn regression with a high dimensional predictor vector, it is important to estimate the central and central mean subspaces that preserve sufficient information about the response and the mean response. Using the Fourier transform, we have derived the candidate matrices whose column spaces recover the central and central mean subspaces exhaustively. Under the normality assumption of the predictors, explicit estimates of the central and central mean subspaces are derived. Bootstrap procedures are used for determining imensionality and choosing tuning parameters. Simulation results and an application to a real data are reported. Our methods demonstrate competitive performance compared with SIR, SAVE, and other existing methods. This approach provides a novel view on sufficient dimension reduction and may lead to more powerful tools in the future. It is a joint work with Dr Yu Zhu in the Department of Statistics, Purdue University.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR SERIES :: Fourier Methods for Sufficient Dimension Reduction in Regression","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR SERIES :: Fourier Methods for Sufficient Dimension Reduction in Regression"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-13T12:00:00-04:00","event_time_end":"2006-04-13T01:00:00-04:00","event_time_end_last":"2006-04-13T01:00:00-04:00","gmt_time_start":"2006-04-13 16:00:00","gmt_time_end":"2006-04-13 05:00:00","gmt_time_end_last":"2006-04-13 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61637":{"#nid":"61637","#data":{"type":"event","title":"The Impact of Reneging in Processor Sharing Queues","body":[{"value":"\u003Cp\u003EProcessor Sharing (PS) queues were originally introduced to analyze the\u003Cbr \/\u003E\nperformance of time-sharing in computer networks. Nowadays, PS queues\u003Cbr \/\u003E\nare one of the most popular congestion models for TCP traffic on the\u003Cbr \/\u003E\nInternet. Under the PS discipline, each customer in the system receives\u003Cbr \/\u003E\nthe same service rate.\n\u003C\/p\u003E\n\u003Cp\u003EMotivated by obtaining a better understanding of the impact of reneging\u003Cbr \/\u003E\n (e.g. aborting the download of a file) in communication\u003Cbr \/\u003E\nnetworks, we consider a PS queue in overload where customers may leave\u003Cbr \/\u003E\nafter a certain amount of time, before their service is finished.\u003Cbr \/\u003E\nUnder the PS service discipline, such behavior is unwelcome, since it\u003Cbr \/\u003E\nalways implies that some work is done in vain. Therefore, when the queue\u003Cbr \/\u003E\nis in overload, the actual throughput can be much lower than the total\u003Cbr \/\u003E\nservice rate.\n\u003C\/p\u003E\n\u003Cp\u003EWe consider a fluid approximation of this queue, which is accurate\u003Cbr \/\u003E\nwhen both the arrival rate and service rate is large. We apply this fluid\u003Cbr \/\u003E\napproximation to analyze the impact of reneging on system performance\u003Cbr \/\u003E\nin PS queues. By studying several examples, we show that the impact can be\u003Cbr \/\u003E\nquite substantial and propose an admission control scheme to reduce its\u003Cbr \/\u003E\neffect.\n\u003C\/p\u003E\n\u003Cp\u003EThis talk is based on joint work with Christian Gromoll (Stanford) and\u003Cbr \/\u003E\nPhilippe Robert (INRIA).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"The Impact of Reneging in Processor Sharing Queues","format":"limited_html"}],"field_summary_sentence":[{"value":"The Impact of Reneging in Processor Sharing Queues"}],"uid":"27279","created_gmt":"2010-10-08 11:36:43","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-25T10:00:00-05:00","event_time_end":"2006-01-24T23:00:00-05:00","event_time_end_last":"2006-01-24T23:00:00-05:00","gmt_time_start":"2006-01-25 15:00:00","gmt_time_end":"2006-01-25 04:00:00","gmt_time_end_last":"2006-01-25 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61607":{"#nid":"61607","#data":{"type":"event","title":"STAT SEMINAR SERIES :: The Use of Control Charts in Health Care Monitoring and Public Health Surveillance","body":[{"value":"\u003Cp\u003EThere are many applications of quality control charts in health care monitoring and in public health surveillance.  In fact, statistical process control (SPC) forms the basis of many disease surveillance systems.  In this overview presentation, these types of applications are introduced along with some of the differences from the standard industrial monitoring environment.  The advantages and disadvantages of some of the charting methods proposed in the health care and public health areas are considered.  Some additional contributions in the industrial statistical process control literature relevant to this area are provided.  There are many research opportunities available in the use of control charts for health-related monitoring and in public health surveillance.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR SERIES :: The Use of Control Charts in Health Care Monitoring and Public Health Surveillance","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR SERIES :: The Use of Control Charts in Health Care Monitoring and Public Health Surveillance"}],"uid":"27279","created_gmt":"2010-10-08 11:35:26","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-20T13:00:00-04:00","event_time_end":"2006-04-20T01:00:00-04:00","event_time_end_last":"2006-04-20T01:00:00-04:00","gmt_time_start":"2006-04-20 17:00:00","gmt_time_end":"2006-04-20 05:00:00","gmt_time_end_last":"2006-04-20 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61641":{"#nid":"61641","#data":{"type":"event","title":"ISyE Seminar Series: Computing Robust Basestocks","body":[{"value":"\u003Cp\u003EA basestock level for a buffer is a quantity s such that if x denotes\u003Cbr \/\u003E\nthe amount of available inventory, the amount to order is max(0, s - x).\u003Cbr \/\u003E\nBasestock policies are extremely popular in supply-chain applications; under appropriate stochastic models of demand uncertainty, they are optimal.  In this talk we discuss algorithms for computing optimal basestock levels under the robust optimization paradigm.  Our algorithms are based on Benders\u0027 decomposition and scale well (under several models of demand uncertainty) with problem size, e.g. up to several hundreds of periods. We will also discuss the extension to safety stocks, to ambiguous demand uncertainty and to model superposition.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Seminar Series: Computing Robust Basestocks","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Seminar Series: Computing Robust Basestocks"}],"uid":"27279","created_gmt":"2010-10-08 11:36:43","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-01-27T10:00:00-05:00","event_time_end":"2006-01-26T23:00:00-05:00","event_time_end_last":"2006-01-26T23:00:00-05:00","gmt_time_start":"2006-01-27 15:00:00","gmt_time_end":"2006-01-27 04:00:00","gmt_time_end_last":"2006-01-27 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61634":{"#nid":"61634","#data":{"type":"event","title":"Faculty Meeting","body":[{"value":"\u003Cp\u003EAgenda to be forwarded via e-mail at a later date\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:36:09","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-02T10:00:00-05:00","event_time_end":"2006-02-01T23:00:00-05:00","event_time_end_last":"2006-02-01T23:00:00-05:00","gmt_time_start":"2006-02-02 15:00:00","gmt_time_end":"2006-02-02 04:00:00","gmt_time_end_last":"2006-02-02 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61631":{"#nid":"61631","#data":{"type":"event","title":"Atlanta INFORMS Chapter Meeting - COIN-OR: Open-Source Software for Operations Research","body":[{"value":"\u003Cp\u003EThe COIN-OR initiative (the Computational Infrastructure for\u003Cbr \/\u003E\nOperations Research) supports the creation and dissemination of open-source\u003Cbr \/\u003E\nsoftware for operations research.  In this presentation, I will discuss the\u003Cbr \/\u003E\nconcept of open source software and the benefits of open source for the\u003Cbr \/\u003E\ncomputational O.R. community.  I will also describe the COIN-OR project\u003Cbr \/\u003E\nitself, the role of the COIN-OR Foundation, the various components\u003Cbr \/\u003E\ncurrently distributed by COIN-OR, and how users and developers can make use\u003Cbr \/\u003E\nof and contribute to the initiative.\n\u003C\/p\u003E\n\u003Cp\u003EProf. Saltzman earned his A.B. in mathematics and computer science from\u003Cbr \/\u003E\nCornell and his M.S. and Ph.D. in operations research from Carnegie\u003Cbr \/\u003E\nMellon.  He is currently on the faculty of Clemson University\u0027s\u003Cbr \/\u003E\nMathematical Sciences Dept.  His research interest is computational\u003Cbr \/\u003E\ndiscrete optimization.  He joined the COIN-OR project shortly after its\u003Cbr \/\u003E\ninception in 2000 and is the founding president of the COIN-OR Foundation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Atlanta INFORMS Chapter Meeting - COIN-OR: Open-Source Software for Operations Research","format":"limited_html"}],"field_summary_sentence":[{"value":"Atlanta INFORMS Chapter Meeting - COIN-OR: Open-Source Software for Operations Research"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-02T16:30:00-05:00","event_time_end":"2006-02-01T23:00:00-05:00","event_time_end_last":"2006-02-01T23:00:00-05:00","gmt_time_start":"2006-02-02 21:30:00","gmt_time_end":"2006-02-02 04:00:00","gmt_time_end_last":"2006-02-02 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61630":{"#nid":"61630","#data":{"type":"event","title":"Faculty Candidate Seminar: Measure Valued Processes, Queues, and Limit Theorems","body":[{"value":"\u003Cp\u003EA stochastic process that takes values in a space of Borel measures is\u003Cbr \/\u003E\ncalled a measure valued process.  This talk will introduce several related\u003Cbr \/\u003E\nmeasure valued processes that can be used to model certain \u0022resource\u003Cbr \/\u003E\nsharing\u0022 queueing systems.  The dynamics of such systems involve complex\u003Cbr \/\u003E\ninteractions, making them difficult to analyze using classical methods.\u003Cbr \/\u003E\nMeasure valued processes provide a tractable description of these\u003Cbr \/\u003E\ndynamics, and working in this context leads to new tools for obtaining\u003Cbr \/\u003E\nscaling limit theorems.  The talk will give an overview of this approach\u003Cbr \/\u003E\nand describe some recent results and open questions.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Candidate Seminar: Measure Valued Processes, Queues, and Limit Theorems","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Candidate Seminar: Measure Valued Processes, Queues, and Limit Theorems"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-06T10:00:00-05:00","event_time_end":"2006-02-05T23:00:00-05:00","event_time_end_last":"2006-02-05T23:00:00-05:00","gmt_time_start":"2006-02-06 15:00:00","gmt_time_end":"2006-02-06 04:00:00","gmt_time_end_last":"2006-02-06 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61604":{"#nid":"61604","#data":{"type":"event","title":"STAT SEMINAR SERIES :: Large margin semi-supervised learning","body":[{"value":"\u003Cp\u003EIn classification, semi-supervised learning occurs when a large amount of unlabeled data is available with only a small number of labeled data. In this talk, I will discuss how to combine unlabeled and labeled data to enhance the generalization accuracy of classification. A large margin technique will be presented, which utilizes grouping information from unlabeled data, together with the concept of margins, in a form of regularization controlling the interplay between labeled and unlabeled data. Computational aspects will be discussed through difference convex programming, in addition to a tuning method that involves both labeled and unlabeled data, for tuning in regularization. Finally, numerical examples will be provided.\n\u003C\/p\u003E\n\u003Cp\u003EThis work is joint with Junhui Wang.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR SERIES :: Large margin semi-supervised learning","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR SERIES :: Large margin semi-supervised learning"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-28T11:00:00-04:00","event_time_end":"2006-04-28T01:00:00-04:00","event_time_end_last":"2006-04-28T01:00:00-04:00","gmt_time_start":"2006-04-28 15:00:00","gmt_time_end":"2006-04-28 05:00:00","gmt_time_end_last":"2006-04-28 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61624":{"#nid":"61624","#data":{"type":"event","title":"ISyE Weekly Tea","body":[{"value":"\u003Cp\u003EThe weekly ISyE tea will take place as usual Wednesday in the second floor lounge.  Please stop by any time between 2:30 and 3:30.  See you there.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Weekly Tea","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Weekly Tea"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-07T13:30:00-05:00","event_time_end":"2006-02-06T23:00:00-05:00","event_time_end_last":"2006-02-06T23:00:00-05:00","gmt_time_start":"2006-02-07 18:30:00","gmt_time_end":"2006-02-07 04:00:00","gmt_time_end_last":"2006-02-07 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61629":{"#nid":"61629","#data":{"type":"event","title":"TBA: Speaker from AirTran","body":"","field_subtitle":"","field_summary":[{"value":"TBA: Speaker from AirTran","format":"limited_html"}],"field_summary_sentence":[{"value":"TBA: Speaker from AirTran"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-09T10:00:00-05:00","event_time_end":"2006-02-08T23:00:00-05:00","event_time_end_last":"2006-02-08T23:00:00-05:00","gmt_time_start":"2006-02-09 15:00:00","gmt_time_end":"2006-02-09 04:00:00","gmt_time_end_last":"2006-02-09 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61636":{"#nid":"61636","#data":{"type":"event","title":"Humanitarian Relief Chain Management","body":[{"value":"\u003Cp\u003EThe unpredictability of global emergencies (e.g., volcanic eruptions, earthquakes, floods) and the stakes of adequate and timely delivery dominate the uniqueness and challenge of managing material flow in the humanitarian relief chain, which holds as its ultimate objective to deliver the appropriate level of resources to locations worldwide in order to minimize human suffering and loss of life.  While international large-scale responses to global emergencies are not new, research to understand and improve the relief supply process has received little attention in the literature.  This presentation introduces the domain of relief chain management, describes recent and ongoing research projects in this area, and provides directions for future work.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Humanitarian Relief Chain Management","format":"limited_html"}],"field_summary_sentence":[{"value":"Humanitarian Relief Chain Management"}],"uid":"27279","created_gmt":"2010-10-08 11:36:42","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-09T10:00:00-05:00","event_time_end":"2006-02-08T23:00:00-05:00","event_time_end_last":"2006-02-08T23:00:00-05:00","gmt_time_start":"2006-02-09 15:00:00","gmt_time_end":"2006-02-09 04:00:00","gmt_time_end_last":"2006-02-09 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61622":{"#nid":"61622","#data":{"type":"event","title":"SC\u0026L Seminar Series :: Flexibility and complexity in periodic distribution problems","body":[{"value":"\u003Cp\u003EIn this talk, we explore trade-offs between flexibility and\u003Cbr \/\u003E\ncomplexity in periodic distribution problems. We consider\u003Cbr \/\u003E\nthe gains from operational flexibility in terms of vehicle routing\u003Cbr \/\u003E\ncosts and customer service benefits, along with the costs of\u003Cbr \/\u003E\nadditional complexity in terms of modeling and solution method\u003Cbr \/\u003E\nrequirements and implementation issues. The period vehicle\u003Cbr \/\u003E\nrouting problem (PVRP) is a variation of the classic vehicle\u003Cbr \/\u003E\nrouting problem in which delivery routes must be constructed\u003Cbr \/\u003E\nover a period of time (for example, multiple days). We introduce\u003Cbr \/\u003E\nthe PVRP with service choice (PVRP-SC) which extends the\u003Cbr \/\u003E\nPVRP to allow service frequency to become a decision of the\u003Cbr \/\u003E\nmodel. We present both exact and heuristic solution methods\u003Cbr \/\u003E\nfor the PVRP with service choice, and we illustrate how the\u003Cbr \/\u003E\nintroduction of service choice impacts modeling and solution\u003Cbr \/\u003E\nmethods. In addition, we investigate broader issues related to the\u003Cbr \/\u003E\nvalue of service choice in terms of improvements to operational\u003Cbr \/\u003E\nefficiency, as well as the complexities of introducing choice into\u003Cbr \/\u003E\ndifficult optimization problems. The talk explores the trade-offs\u003Cbr \/\u003E\nbetween the system performance improvements due to operational\u003Cbr \/\u003E\nflexibility and the resulting increases in computational and\u003Cbr \/\u003E\nimplementation complexity. \n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SC\u0026amp;L Seminar Series :: Flexibility and complexity in periodic distribution problems","format":"limited_html"}],"field_summary_sentence":[{"value":"SC\u0026L Seminar Series :: Flexibility and complexity in periodic distribution problems"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-16T10:00:00-05:00","event_time_end":"2006-02-15T23:00:00-05:00","event_time_end_last":"2006-02-15T23:00:00-05:00","gmt_time_start":"2006-02-16 15:00:00","gmt_time_end":"2006-02-16 04:00:00","gmt_time_end_last":"2006-02-16 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61623":{"#nid":"61623","#data":{"type":"event","title":"Staff Meeting","body":[{"value":"\u003Cp\u003EA staff meeting will be held Feb. 21, 2006, at 10:00 am., in the conference room 226.  Chip White would like to say a few words prior to the meeting.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Staff Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"Staff Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-21T09:00:00-05:00","event_time_end":"2006-02-20T23:00:00-05:00","event_time_end_last":"2006-02-20T23:00:00-05:00","gmt_time_start":"2006-02-21 14:00:00","gmt_time_end":"2006-02-21 04:00:00","gmt_time_end_last":"2006-02-21 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61628":{"#nid":"61628","#data":{"type":"event","title":"QCF Faculty Candidate Seminar: Optimal Dividend Policy with Mean-Reverting Cash Reservoir","body":"","field_subtitle":"","field_summary":[{"value":"QCF Faculty Candidate Seminar: Optimal Dividend Policy with Mean-Reverting Cash Reservoir","format":"limited_html"}],"field_summary_sentence":[{"value":"QCF Faculty Candidate Seminar: Optimal Dividend Policy with Mean-Reverting Cash Reservoir"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-21T10:00:00-05:00","event_time_end":"2006-02-20T23:00:00-05:00","event_time_end_last":"2006-02-20T23:00:00-05:00","gmt_time_start":"2006-02-21 15:00:00","gmt_time_end":"2006-02-21 04:00:00","gmt_time_end_last":"2006-02-21 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61627":{"#nid":"61627","#data":{"type":"event","title":"QCF Faculty Candidate Seminar: Portfolio Optimization with Drawdown Constraints","body":"","field_subtitle":"","field_summary":[{"value":"QCF Faculty Candidate Seminar: Portfolio Optimization with Drawdown Constraints","format":"limited_html"}],"field_summary_sentence":[{"value":"QCF Faculty Candidate Seminar: Portfolio Optimization with Drawdown Constraints"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-28T10:00:00-05:00","event_time_end":"2006-02-27T23:00:00-05:00","event_time_end_last":"2006-02-27T23:00:00-05:00","gmt_time_start":"2006-02-28 15:00:00","gmt_time_end":"2006-02-28 04:00:00","gmt_time_end_last":"2006-02-28 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61625":{"#nid":"61625","#data":{"type":"event","title":"EMIL and SCOR Sponsor Supply Executive Forum in Shanghai","body":[{"value":"\u003Cp\u003EChina\u0026rsquo;s ascendance as the world\u0026rsquo;s factory and as a growing consumer market is transforming global commerce and the supply chains that support it. What are the expectations for China\u0026rsquo;s rise and how are the world\u0026rsquo;s leading companies preparing for it? What challenges do we face in achieving those visions?\n\u003C\/p\u003E\n\u003Cp\u003EThe Supply Chain Council\u0026rsquo;s Executive Forum provides an excellent opportunity for supply chain executives to share their experiences, challenges and successes  with each other. Gain valuable insights from supply chain leaders including \u003Cstrong\u003EJean-Luc Chereau, President, Carrefour China\u003C\/strong\u003E \u003Cem\u003E(Carrefour is the second largest retailer globally and ranks first in 15 main cities in China)\u003C\/em\u003E, \u003Cstrong\u003EYing Wu, Executive Director, Business Transformation, Global Supply Chain, Lenovo\u003C\/strong\u003E \u003Cem\u003E(Lenovo is the largest PC manufacturer in China)\u003C\/em\u003E and \u003Cstrong\u003EChris Gubbey, Executive Vice President of SGM and the GM China Group\u003C\/strong\u003E \u003Cem\u003E(General Motors is China\u0027s top-selling foreign automaker).\u003C\/em\u003E\n\u003C\/p\u003E\n\u003Cp\u003ENetwork with Georgia Tech\u0026rsquo;s EMIL class including Vice Presidents, Directors and Senior Managers from BAX, BMW, Dell, Disney, Ferragamo, Hapag-Lloyd, Hewlett-Packard, Intel, Kuehne \u0026amp; Nagel, Lowe\u0026rsquo;s, Milliken, Motorola, Pitney-Bowes, UPS, etc.\n\u003C\/p\u003E\n\u003Cp\u003EThe Council is very honored to have John Vande Vate, \u003Ca href=\u0022http:\/\/www.emil.gatech.edu\u0022\u003EEMIL Executive Director\u003C\/a\u003E, Georgia Institute of Technology, USA, and Takashi Oishi, Senior Expert, NEC Corporation, Japan, as co-chairs for this event. The program also include Breakout Discussion Groups so that attendees may participate in small-group discussion on:\n\u003C\/p\u003E\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026middot;Challenges to Developing National Distribution Networks In China\u003Cbr \/\u003E\n\u0026nbsp;\u0026nbsp;\u0026middot;Challenges for Supplying International Customers In The Face Of Constrained Transport Capacity: Lean Meets Global Sourcing\u003Cbr \/\u003E\n\u0026nbsp;\u0026nbsp;\u0026middot;Anticipating Future Risks: What Will Be The Next Big Supply Chain Disruptions?\n\u003C\/p\u003E\n\u003Cp\u003EThe Jin Jiang Hotel is in the \u0026quot;French Quarter\u0026quot; of Shanghai. This is a famous old hotel that was renovated not too long ago. It is ideally located near \u0026quot;Xin tian di\u0026quot; in one of Shanghai\u0027s nicer shopping districts.\n\u003C\/p\u003E\n\u003Cp\u003EFor more information relating to the conference (registration form, hotel information, program, etc.), please visit the \u003Cstrong\u003E\u003Ca href=\u0022http:\/\/www.supply-chain.org\/page.ww?name=Events+Calendar+Detail\u0026amp;section=Events+Calendar\u0026amp;id=25\u0022\u003EShanghai Executive Forum page within Supply Chain Council\u0027s website\u003C\/a\u003E\u003C\/strong\u003E.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"EMIL and SCOR Sponsor Supply Executive Forum in Shanghai","format":"limited_html"}],"field_summary_sentence":[{"value":"EMIL and SCOR Sponsor Supply Executive Forum in Shanghai"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-02-28T23:00:00-05:00","event_time_end":"2006-02-28T23:00:00-05:00","event_time_end_last":"2006-02-28T23:00:00-05:00","gmt_time_start":"2006-03-01 04:00:00","gmt_time_end":"2006-03-01 04:00:00","gmt_time_end_last":"2006-03-01 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61626":{"#nid":"61626","#data":{"type":"event","title":"Georgia Tech :: IIE Career Fair 2006","body":[{"value":"\u003Cp\u003EIt is time again for the Georgia Tech IIE Career Fair! Please see the attached flyer for in depth information on our event taking place on March 2, 2006. \n\u003C\/p\u003E\n\u003Cp\u003EThe Pre-Registration Form can be found attached to the email. If interested, please fill out the form and return it by email to \u003Ca href=\u0022mailto:melody.phan@gtiie.org\u0022\u003Emelody.phan@gtiie.org\u003C\/a\u003E by February 13, 2006. \n\u003C\/p\u003E\n\u003Cp\u003EInstructions on payment are listed on the Pre-Registration Form. \n\u003C\/p\u003E\n\u003Cp\u003EThe 2006 IIE Executive Board looks forward to seeing you there!\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Georgia Tech :: IIE Career Fair 2006","format":"limited_html"}],"field_summary_sentence":[{"value":"Georgia Tech :: IIE Career Fair 2006"}],"uid":"27279","created_gmt":"2010-10-08 11:36:08","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-02T09:00:00-05:00","event_time_end":"2006-03-01T23:00:00-05:00","event_time_end_last":"2006-03-01T23:00:00-05:00","gmt_time_start":"2006-03-02 14:00:00","gmt_time_end":"2006-03-02 04:00:00","gmt_time_end_last":"2006-03-02 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61620":{"#nid":"61620","#data":{"type":"event","title":"SC\u0026L Seminar Series :: Stochastic Joint Replenishment Problem in a Two Echelon Inventory System: Analysis and Insights","body":[{"value":"\u003Cp\u003EIn this study, we examine replenishment coordination strategies for multiple location inventory systems. In particular, we study a stochastic joint replenishment policy class for a two-echelon divergent inventory system. Starting with the single location model which represents a two-echelon supply chain for a single item with multiple locations, where the upper echelon employs cross docking, we extend our model to incorporate multi-location settings where the upper echelon also holds inventory. Our modeling methodology based on the development of the ordering process by the lower echelon provides an analytical tool to investigate various joint replenishment policies. An extensive numerical study is conducted to determine the performance of the system and identify regions of dominance across policies. Our findings have implications for design and management of supply chains. \n\u003C\/p\u003E\n\u003Cp\u003EPizza lunch sponsored by The Logistics Institute. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SC\u0026amp;L Seminar Series :: Stochastic Joint Replenishment Problem in a Two Echelon Inventory System: Analysis and Insights","format":"limited_html"}],"field_summary_sentence":[{"value":"SC\u0026L Seminar Series :: Stochastic Joint Replenishment Problem in a Two Echelon Inventory System: Analysis and Insights"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-02T10:00:00-05:00","event_time_end":"2006-03-01T23:00:00-05:00","event_time_end_last":"2006-03-01T23:00:00-05:00","gmt_time_start":"2006-03-02 15:00:00","gmt_time_end":"2006-03-02 04:00:00","gmt_time_end_last":"2006-03-02 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61621":{"#nid":"61621","#data":{"type":"event","title":"Faculty Candidate Seminar: Ramandeep Randhawa - Operational Benefits of Subscription Services","body":[{"value":"\u003Cp\u003EAbstract\n\u003C\/p\u003E\n\u003Cp\u003E\tIn this talk we study a monopolistic firm that offers reusable products, or a service, to price and quality-of-service sensitive customers - a rental firm can be thought of as the canonical example. Customers\u0027 perception of quality is determined by their likelihood of obtaining the product or service immediately upon request. We study the alternatives of offering either a subscription option or a pay-per-use option from a profit-maximizing perspective. In order to do this we propose a Markovian model of how subscribers generate requests and use a standard Poisson model for the pay-per-use option. In a large market setting, under the assumption of exponential demand, we show that using the subscription option is more profitable for the firm. Further, via a numerical study, we show that this assumption is not essential for the result to hold. However, we show that it is not necessarily true that the subscription option dominates the pay-per-use option on quality-of-service. The firm is able to manage the trade-off between price and quality-of-service better in the subscription option. Moreover, we show that the social welfare and the consumer surplus can also be higher in the subscription option, indicating that both the firm and the consumers can benefit from the subscription option.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Candidate Seminar: Ramandeep Randhawa - Operational Benefits of Subscription Services","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Candidate Seminar: Ramandeep Randhawa - Operational Benefits of Subscription Services"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-06T10:00:00-05:00","event_time_end":"2006-03-05T23:00:00-05:00","event_time_end_last":"2006-03-05T23:00:00-05:00","gmt_time_start":"2006-03-06 15:00:00","gmt_time_end":"2006-03-06 04:00:00","gmt_time_end_last":"2006-03-06 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61618":{"#nid":"61618","#data":{"type":"event","title":"Faculty Candidate Seminar: Tomer Yahalom - Designing and Pricing Incentive Compatible Grades of Service in Queueing Systems","body":[{"value":"\u003Cp\u003EA profit-maximizing service provider (SP) confronts several classes\u003Cbr \/\u003E\nof potential subscribers that differ in their delay sensitivity. The\u003Cbr \/\u003E\nSP may offer several grades of service at different prices, those\u003Cbr \/\u003E\nservice grades being operationally defined by the scheduling rule\u003Cbr \/\u003E\nused when jobs compete for capacity.  We characterize the provider\u0027s\u003Cbr \/\u003E\noptimal, incentive compatible menu of service grades and their\u003Cbr \/\u003E\nassociated prices, generalizing an earlier analysis with linear\u003Cbr \/\u003E\ndelay costs.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Candidate Seminar: Tomer Yahalom - Designing and Pricing Incentive Compatible Grades of Service in Queueing Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Candidate Seminar: Tomer Yahalom - Designing and Pricing Incentive Compatible Grades of Service in Queueing Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-09T10:00:00-05:00","event_time_end":"2006-03-08T23:00:00-05:00","event_time_end_last":"2006-03-08T23:00:00-05:00","gmt_time_start":"2006-03-09 15:00:00","gmt_time_end":"2006-03-09 04:00:00","gmt_time_end_last":"2006-03-09 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61617":{"#nid":"61617","#data":{"type":"event","title":"STATISTICS SEMINAR SERIES :: Engineered Decision Systems","body":[{"value":"\u003Cp\u003EThis talk focuses on research opportunities for Industrial Engineers (IE) in the area of engineered decision systems.\u003Cbr \/\u003E\nWe start with an overview of the national and global trends that have had or will have significant impact on the IE research enterprise. We will then discuss the upcoming reorganization of the Engineering Directorate and its implications for IE researchers. Given these exogenous constraints, we will discuss potential strategies for maintaining\/enhancing competitiveness of IE researchers in securing extramural funding.\u003Cbr \/\u003E\nIn light of the strategic research areas identified by the Engineering Directorate, we will focus on engineered decision systems as a potential target area for IE researchers. The talk will present current NSF investments in the area, ranging from manufacturing and service to infrastructure systems. Finally, upcoming opportunities for multidisciplinary collaborative research in this area will be highlighted.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR SERIES :: Engineered Decision Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR SERIES :: Engineered Decision Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-10T10:00:00-05:00","event_time_end":"2006-03-09T23:00:00-05:00","event_time_end_last":"2006-03-09T23:00:00-05:00","gmt_time_start":"2006-03-10 15:00:00","gmt_time_end":"2006-03-10 04:00:00","gmt_time_end_last":"2006-03-10 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61619":{"#nid":"61619","#data":{"type":"event","title":"QCF Faculty Candidate Seminar: Vadim Linetsky","body":[{"value":"\u003Cp\u003ETBA\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"QCF Faculty Candidate Seminar: Vadim Linetsky","format":"limited_html"}],"field_summary_sentence":[{"value":"QCF Faculty Candidate Seminar: Vadim Linetsky"}],"uid":"27279","created_gmt":"2010-10-08 11:36:07","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-14T10:00:00-05:00","event_time_end":"2006-03-13T23:00:00-05:00","event_time_end_last":"2006-03-13T23:00:00-05:00","gmt_time_start":"2006-03-14 15:00:00","gmt_time_end":"2006-03-14 04:00:00","gmt_time_end_last":"2006-03-14 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61615":{"#nid":"61615","#data":{"type":"event","title":"Sequential Monte Carlo and Protein Structure\/Funding Opportunities for Statisticians at NSF","body":[{"value":"\u003Cp\u003EPart I\n\u003C\/p\u003E\n\u003Cp\u003ESequential Monte Carlo and Protein Structure\n\u003C\/p\u003E\n\u003Cp\u003ERong Chen\u003Cbr \/\u003E\nDepartment of Information and Decision Sciences\u003Cbr \/\u003E\nUniversity of Illinois at Chicago\n\u003C\/p\u003E\n\u003Cp\u003EThe sequential Monte Carlo (SMC) methodology emerged in the fields of statistics and engineering has shown a great promise in solving a large class of highly complex inference and optimization problems. It is a family of Monte Carlo techniques that is based on the \u0027growth principle\u0027 in dealing with high dimensional complex systems. Specially, a high dimensional problem is decomposed into a sequence of low dimensional problems which forms a stochastic dynamic system. Weighted Monte Carlo samples are drawn from each of simpler component, and their combination then forms a Monte Carlo sample of the original system.\n\u003C\/p\u003E\n\u003Cp\u003EIn this talk, we present SMC approaches in studying geometric properties of proteins. Specifically we introduce the general strategy of intermediate distribution design, look-ahead, multi-grid sampling and constraint enforcement. It is used to generate protein structures with certain geometric constraints, under a discrete off-lattice model.\n\u003C\/p\u003E\n\u003Cp\u003EPart II\n\u003C\/p\u003E\n\u003Cp\u003EFunding Opportunities for Statisticians at NSF\n\u003C\/p\u003E\n\u003Cp\u003ERong Chen\u003Cbr \/\u003E\nNational Science Foundation\n\u003C\/p\u003E\n\u003Cp\u003EIn this talk, some of the funding opportunities for statisticians at NSF will be introduced, including the regular statistics program and programs in the mathematical priority area. Some tips on proposal writing will be offered. Suggestions, comments, and discussion on future direction of statistics are welcome.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Sequential Monte Carlo and Protein Structure\/Funding Opportunities for Statisticians at NSF","format":"limited_html"}],"field_summary_sentence":[{"value":"Sequential Monte Carlo and Protein Structure\/Funding Opportunities for Statisticians at NSF"}],"uid":"27279","created_gmt":"2010-10-08 11:36:06","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-16T08:30:00-05:00","event_time_end":"2006-03-15T23:00:00-05:00","event_time_end_last":"2006-03-15T23:00:00-05:00","gmt_time_start":"2006-03-16 13:30:00","gmt_time_end":"2006-03-16 04:00:00","gmt_time_end_last":"2006-03-16 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61613":{"#nid":"61613","#data":{"type":"event","title":"Faculty candidate seminar: Robert Hampshire:  Managing Communication Services with Extended Markovian Service Networks","body":[{"value":"\u003Cp\u003EIn the Internet age, the telecommunications industry is spawning\u003Cbr \/\u003E\n innovative services and systems. The industry is growing\u003Cbr \/\u003E\n rapidly due to reduced equipment costs, intense competition and\u003Cbr \/\u003E\n deregulation. Effective management of these new services is often\u003Cbr \/\u003E\ndifficult due complexity and uncertainty. The service manager\u003Cbr \/\u003E\n would like to maximize profit while maintaining a quality customer\u003Cbr \/\u003E\n experience. Three fundamental management problems are identified and\u003Cbr \/\u003E\n addressed\u003Cbr \/\u003E\n performance, provisioning and pricing.\n\u003C\/p\u003E\n\u003Cp\u003E Time varying queueing models and dynamic optimization are combined\u003Cbr \/\u003E\n to tackle these three management problems. The communication services\u003Cbr \/\u003E\n under examination are bandwidth leasing, call centers and web \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty candidate seminar: Robert Hampshire:  Managing Communication Services with Extended Markovian Service Networks","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty candidate seminar: Robert Hampshire:  Managing Communication Services with Extended Markovian Service Networks"}],"uid":"27279","created_gmt":"2010-10-08 11:35:27","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-16T10:00:00-05:00","event_time_end":"2006-03-15T23:00:00-05:00","event_time_end_last":"2006-03-15T23:00:00-05:00","gmt_time_start":"2006-03-16 15:00:00","gmt_time_end":"2006-03-16 04:00:00","gmt_time_end_last":"2006-03-16 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61633":{"#nid":"61633","#data":{"type":"event","title":"Faculty Meeting :: To Be Rescheduled at a later time.","body":[{"value":"\u003Cp\u003ETo be rescheduled at a later date.  The new date will be sent via e-mail.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Meeting :: To Be Rescheduled at a later time.","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Meeting :: To Be Rescheduled at a later time."}],"uid":"27279","created_gmt":"2010-10-08 11:36:09","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-16T10:00:00-05:00","event_time_end":"2006-03-15T23:00:00-05:00","event_time_end_last":"2006-03-15T23:00:00-05:00","gmt_time_start":"2006-03-16 15:00:00","gmt_time_end":"2006-03-16 04:00:00","gmt_time_end_last":"2006-03-16 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61614":{"#nid":"61614","#data":{"type":"event","title":"INFORMS Student Chapter Talk :: Deciding Codeshared Flights:  A Case Study in Optimization","body":[{"value":"\u003Cp\u003EOver the past two decades, airlines have entered into partnerships\u003Cbr \/\u003E\nallowing them to market other airlines\u0027 flights as their own.  This process,\u003Cbr \/\u003E\nknown as \u0022codesharing,\u0022 allows partnering airlines to increase revenues by\u003Cbr \/\u003E\nexpanding their networks.  Decisions regarding codeshare flight selection\u003Cbr \/\u003E\nare subject to multiple regulatory, legal, and contractual issues.  This\u003Cbr \/\u003E\ntalk will focus on the development of models and solution methods to\u003Cbr \/\u003E\nautomate the codeshare decision process at Delta Air Lines.  The intent is\u003Cbr \/\u003E\nto provide an example of a real-world application of operations research\u003Cbr \/\u003E\ntools and techniques and to discuss how concepts learned in the classroom\u003Cbr \/\u003E\nlead to real results in a business setting.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"INFORMS Student Chapter Talk :: Deciding Codeshared Flights:  A Case Study in Optimization","format":"limited_html"}],"field_summary_sentence":[{"value":"INFORMS Student Chapter Talk :: Deciding Codeshared Flights:  A Case Study in Optimization"}],"uid":"27279","created_gmt":"2010-10-08 11:35:27","changed_gmt":"2016-10-08 01:52:39","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-03-16T15:00:00-05:00","event_time_end":"2006-03-15T23:00:00-05:00","event_time_end_last":"2006-03-15T23:00:00-05:00","gmt_time_start":"2006-03-16 20:00:00","gmt_time_end":"2006-03-16 04:00:00","gmt_time_end_last":"2006-03-16 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61586":{"#nid":"61586","#data":{"type":"event","title":"ISyE Faculty Retreat","body":[{"value":"\u003Cp\u003EThe ISyE 2006 Offsite will be on September 8-9, 2006 at the Marriott Evergreen Conference Center in Stone Mountain, GA.\n\u003C\/p\u003E\n\u003Cp\u003E* AGENDA\n\u003C\/p\u003E\n\u003Cp\u003EThe meeting will start off at 6:00pm on Friday, September 8, 2006 with an address from our chair Chip White, followed by dinner and evening social. We will have a day long meeting the following day (Saturday, September 9, 2006) starting with breakfast at 7:00am, and finishing at 5:00pm. \n\u003C\/p\u003E\n\u003Cp\u003EA detailed agenda will be made available shortly via email to the faculty.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Faculty Retreat","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Faculty Retreat"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-08T19:00:00-04:00","event_time_end":"2006-09-08T01:00:00-04:00","event_time_end_last":"2006-09-08T01:00:00-04:00","gmt_time_start":"2006-09-08 23:00:00","gmt_time_end":"2006-09-08 05:00:00","gmt_time_end_last":"2006-09-08 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61578":{"#nid":"61578","#data":{"type":"event","title":"Professor of Practice Lecture :: Strategic Impact of Logistics and Supply Chain Management:  Career Perspectives","body":[{"value":"\u003Cp\u003EThis presentation will highlight Dr. John Langley\u0027s involvement in the fields of logistics and supply chain management from both an academic and industry perspective. \n\u003C\/p\u003E\n\u003Cp\u003EAdditional focus will be on several research areas with which he has been involved:  logistics and supply chain strategy; global shipment network database; supply chain collaboration; and outsourcing and third party logistics.  \n\u003C\/p\u003E\n\u003Cp\u003EThe seminar will conclude with several suggested directions and priorities for Georgia Tech and its logistics programs.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Professor of Practice Lecture :: Strategic Impact of Logistics and Supply Chain Management:  Career Perspectives","format":"limited_html"}],"field_summary_sentence":[{"value":"Professor of Practice Lecture :: Strategic Impact of Logistics and Supply Chain Management:  Career Perspectives"}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-12T12:00:00-04:00","event_time_end":"2006-09-12T01:00:00-04:00","event_time_end_last":"2006-09-12T01:00:00-04:00","gmt_time_start":"2006-09-12 16:00:00","gmt_time_end":"2006-09-12 05:00:00","gmt_time_end_last":"2006-09-12 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61576":{"#nid":"61576","#data":{"type":"event","title":"Stochastics Seminar :: The G\/GI\/N Queue in the Halfin and Whitt Regime","body":[{"value":"\u003Cp\u003EThe many-server, heavy traffic limiting regime for the $GI\/M\/N$ queue was first proposed by Shlomo Halfin and Ward Whitt in 1981. Since that time, the extension of their results to the more general $GI\/GI\/N$ queue has remained an important open problem. In this talk, we will provide a solution to a substantial portion of this problem by extending Halfin and Whitt\u0027s results to the class of service time distributions which possess a continuous density. These results are relevant to the design and control of modern, large-scale telephone call centers, where Halfin and Whitt\u0027s regime is used as a popular modeling tool and the service times are typically not exponentially distributed.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: The G\/GI\/N Queue in the Halfin and Whitt Regime","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: The G\/GI\/N Queue in the Halfin and Whitt Regime"}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-13T17:30:00-04:00","event_time_end":"2006-09-13T01:00:00-04:00","event_time_end_last":"2006-09-13T01:00:00-04:00","gmt_time_start":"2006-09-13 21:30:00","gmt_time_end":"2006-09-13 05:00:00","gmt_time_end_last":"2006-09-13 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61577":{"#nid":"61577","#data":{"type":"event","title":"William C. Kessler Faculty Seminar - Large Scale Enterprise Transformation: One Company\u0027s Results, Approach and Lessons","body":[{"value":"\u003Cp\u003ELockheed Martin Aeronautics Company was established in 2000 from the consolidation of three separate Aeronautics Companies. The speaker will discuss reasons for undertaking such large scale changes, how the company leadership designed and implemented the changes, and the sustainable results from the transformation. Lessons and some knowledge gaps will also be discussed.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"William C. Kessler Faculty Seminar - Large Scale Enterprise Transformation: One Company\u0027s Results, Approach and Lessons","format":"limited_html"}],"field_summary_sentence":[{"value":"William C. Kessler Faculty Seminar - Large Scale Enterprise Transformation: One Company\u0027s Results, Approach and Lessons"}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-14T12:00:00-04:00","event_time_end":"2006-09-14T01:00:00-04:00","event_time_end_last":"2006-09-14T01:00:00-04:00","gmt_time_start":"2006-09-14 16:00:00","gmt_time_end":"2006-09-14 05:00:00","gmt_time_end_last":"2006-09-14 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61575":{"#nid":"61575","#data":{"type":"event","title":"SC\u0026L SEMINAR SERIES :: Impact of Discrete Rest Locations on Long-Haul Trucking Productivity","body":[{"value":"\u003Cp\u003EThis Friday, we will initiate the SCL seminar series for this Fall.  Graduate students interested in transportation, logistics, and supply chains are encouraged to attend...if you are interested in presenting, please contact Jessica or Ashlea.  \n\u003C\/p\u003E\n\u003Cp\u003EPizza and refreshments sponsored by The Logistics Institute.  \n\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E  We develop an approach for analyzing how restricting rest (sleep) locations for long-haul truckers may impact operational productivity, given hours-of-service regulations. Productivity is measured by the minimum number of drivers required to feasibly execute a set of load requests over a known planning horizon.  When drivers may stop for rest at any location, they are able to maximize utilization under regulated driving hours.  When drivers may only stop for rest at certain discrete locations, drivers may suffer decreased utilization.  The framework and results should be especially useful in the analysis of truck transportation of security-sensitive commodities, such as food products and hazardous materials, where there may exist strong external pressure to ensure that drivers rest only in secure locations to reduce risks of tampering. We consider first the case of shipping on a single transportation lane.  Computational analysis on sample data sets indicates that when a small number of rest locations are located optimally, the productivity impact of restricting rest to a small number of discrete locations is likely to be small.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SC\u0026amp;L SEMINAR SERIES :: Impact of Discrete Rest Locations on Long-Haul Trucking Productivity","format":"limited_html"}],"field_summary_sentence":[{"value":"SC\u0026L SEMINAR SERIES :: Impact of Discrete Rest Locations on Long-Haul Trucking Productivity"}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-22T13:00:00-04:00","event_time_end":"2006-09-22T01:00:00-04:00","event_time_end_last":"2006-09-22T01:00:00-04:00","gmt_time_start":"2006-09-22 17:00:00","gmt_time_end":"2006-09-22 05:00:00","gmt_time_end_last":"2006-09-22 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61574":{"#nid":"61574","#data":{"type":"event","title":"William-Sonoma Logistics Network","body":[{"value":"\u003Cp\u003EWe are pleased to invite you to the \u003Cstrong\u003EWilliams-Sonoma, Inc. Event\u003C\/strong\u003E hosted by  the Institute of Industrial Engineers on \u003Cstrong\u003E\u003Cem\u003ETuesday, September 26, 2006, from 11am until 12pm in IC (Instructional Center)\u003Cbr \/\u003E\n      room 105\u003C\/em\u003E\u003C\/strong\u003E. Please come to see our representatives at this\u003Cbr \/\u003E\n      event and you will learn about our Company, its distribution and transportation\u003Cbr \/\u003E\n      network and operations\/engineering strategy. \u003C\/p\u003E\n\u003Cp\u003EWilliams, Sonoma, Inc. is the nations\u0026rsquo; leader in catalog and retail\u003Cbr \/\u003E\n  sales of home centered products.\u0026nbsp; \u003Cstrong\u003E\u003Cem\u003EPottery Barn, Pottery Barn\u003Cbr \/\u003E\n  Kids, PB Teen, Pottery Barn Bed + Bath, Williams-Sonoma Home, Williams-Sonoma,\u003Cbr \/\u003E\n  and West Elm\u003C\/em\u003E\u003C\/strong\u003E are all companies under the Williams-Sonoma, Inc.\u003Cbr \/\u003E\n  umbrella.\u0026nbsp; Our Memphis and Olive Branch Distribution facilities support\u003Cbr \/\u003E\n  our 552 stores, seven mail order catalogs and five e-commerce web sites, which\u003Cbr \/\u003E\n  generate over 3.5 billion in annual sales. Distribution facilities are located\u003Cbr \/\u003E\n  in Memphis, TN, Olive Branch, MS, Cranbury, NJ, and Ontario, CA. We are the\u003Cbr \/\u003E\n  largest distributor in the area.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWilliams-Sonoma Representatives attending: \u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ETim Stover\u003C\/strong\u003E, Vice-President of Engineering at Williams-Sonoma,\u003Cbr \/\u003E\n  Inc. Tim manages all aspects of facility functions to include material handling\u003Cbr \/\u003E\n  installs, upgrades, and improvements in all DC\u0027s; oversees all new building\u003Cbr \/\u003E\n  construction from start-up to sign-off by operations and supports regional\u003Cbr \/\u003E\n  DC\u0027s in all areas of capex projects, staffing plans, and method improvements.\u003Cbr \/\u003E\n  Tim\u0027 team supports all the Distribution Centers in Memphis, TN; Olive Branch,\u003Cbr \/\u003E\n  MS and Cranbury, NJ. Tim has been in the plant engineering\/facility management\u003Cbr \/\u003E\n  field during the past 20 years. He received a B.S. in Electrical Engineering\u003Cbr \/\u003E\n  from The University of Tennessee.\u0026nbsp; \u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ECarl Carbonell, \u003C\/strong\u003EDirector of Separate Ship Distribution in\u003Cbr \/\u003E\n  Olive Branch, MS. Carl maintains operational responsibility for all distribution\u003Cbr \/\u003E\n  and transportation operations for Separate Ship Facility in Olive Branch, MS.\u003Cbr \/\u003E\n  Carl has 19 years of operations experience, including 4 years at Williams-Sonoma,\u003Cbr \/\u003E\n  Inc. and 15 years at specialty retail apparel J.Crew. He received a B.A. in\u003Cbr \/\u003E\n  Accounting from the Lynchburg College in Lynchburg, VA. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"William-Sonoma Logistics Network","format":"limited_html"}],"field_summary_sentence":[{"value":"William-Sonoma Logistics Network"}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-26T12:00:00-04:00","event_time_end":"2006-09-26T01:00:00-04:00","event_time_end_last":"2006-09-26T01:00:00-04:00","gmt_time_start":"2006-09-26 16:00:00","gmt_time_end":"2006-09-26 05:00:00","gmt_time_end_last":"2006-09-26 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61584":{"#nid":"61584","#data":{"type":"event","title":"ISyE Faculty Meeting","body":[{"value":"\u003Cp\u003EDistributed via email.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Faculty Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Faculty Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-28T12:00:00-04:00","event_time_end":"2006-09-28T01:00:00-04:00","event_time_end_last":"2006-09-28T01:00:00-04:00","gmt_time_start":"2006-09-28 16:00:00","gmt_time_end":"2006-09-28 05:00:00","gmt_time_end_last":"2006-09-28 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61569":{"#nid":"61569","#data":{"type":"event","title":"STATISTICS SEMINAR :: Efficient and Portable Multiple Recursive Generators of Large Order","body":[{"value":"\u003Cp\u003EDX Generator, proposed first by Deng and Xu [2003], is becoming  well-known in the computer simulation and scientific computing  community with its record-breaking period. DX generator is a special  class of multiple recursive generators of prime modulus and a large  order where all nonzero coefficients of the recurrence are equal. In  this talk, we discuss some key issues and their solutions to find  large order generators with the property of high-dimensional  equidistribution and extremely long period length. Some specific  generators will be presented with the period length approximately of  10\u003Csup\u003E14903\u003C\/sup\u003E.1.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Efficient and Portable Multiple Recursive Generators of Large Order","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Efficient and Portable Multiple Recursive Generators of Large Order"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-29T13:00:00-04:00","event_time_end":"2006-09-29T01:00:00-04:00","event_time_end_last":"2006-09-29T01:00:00-04:00","gmt_time_start":"2006-09-29 17:00:00","gmt_time_end":"2006-09-29 05:00:00","gmt_time_end_last":"2006-09-29 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61568":{"#nid":"61568","#data":{"type":"event","title":"Continuum models and their validation for semiconductor production","body":[{"value":"\u003Cp\u003EA review of continuum models for production flows involving a large number of items and a large number of production stages is presented. The basic heuristic model is based on mass conservation and state equations for the relationship between the cycle time and the amount of work in progress in a factory. Heuristic extensions lead to advection diffusion equations and to capacity limited fluxes. Comparisons between discrete event simulations, factory data, numerical solutions of the heuristic PDEs and queuing network models are made.  A first principle model based on the Boltzman equation for a probability density of a production lot, evolving in time and  production stages is shown to lead to an advection diffusion equation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Continuum models and their validation for semiconductor production","format":"limited_html"}],"field_summary_sentence":[{"value":"Continuum models and their validation for semiconductor production"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-03T12:00:00-04:00","event_time_end":"2006-10-03T01:00:00-04:00","event_time_end_last":"2006-10-03T01:00:00-04:00","gmt_time_start":"2006-10-03 16:00:00","gmt_time_end":"2006-10-03 05:00:00","gmt_time_end_last":"2006-10-03 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61571":{"#nid":"61571","#data":{"type":"event","title":"Distinguished Lecture :: Continuum models and their validation for semiconductor production","body":[{"value":"\u003Cp\u003EA review of continuum models for production flows involving a large number of items and a large number of production stages is presented. The basic heuristic model is based on mass conservation and state equations for the relationship between the cycle time and the amount of work in progress in a factory. Heuristic extensions lead to advection diffusion equations and to capacity limited fluxes. Comparisons between discrete event simulations, factory data, numerical solutions of the heuristic PDEs and queuing network models are made.  A first principle model based on the Boltzman equation for a probability density of a production lot, evolving in time and  production stages is shown to lead to an advection diffusion equation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Distinguished Lecture :: Continuum models and their validation for semiconductor production","format":"limited_html"}],"field_summary_sentence":[{"value":"Distinguished Lecture :: Continuum models and their validation for semiconductor production"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-03T12:00:00-04:00","event_time_end":"2006-10-03T01:00:00-04:00","event_time_end_last":"2006-10-03T01:00:00-04:00","gmt_time_start":"2006-10-03 16:00:00","gmt_time_end":"2006-10-03 05:00:00","gmt_time_end_last":"2006-10-03 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61567":{"#nid":"61567","#data":{"type":"event","title":"Integrated Modeling of Electric Power System Operations and Electricity Market Risks with Applications","body":[{"value":"\u003Cp\u003EBecause of the physical nature of electricity and the complexity of system operations, many challenging problems have arisen from the restructuring of electric power industry. Tremendous uncertainties put market participants in the midst of unprecedented risks when making the planning, operating, and trading decisions. This situation has motivated the reported research work on modeling, evaluating, and constructing strategies to hedge against the market risks involved. Through integrated modeling of power system operations and market risks, this thesis addresses a variety of important issues on market signals modeling, generation capacity scheduling, and electricity forward trading. \n\u003C\/p\u003E\n\u003Cp\u003EThe level of investment in electricity transmission networks has been lagging behind those in the generation and distribution sectors amid the industry restructuring. It affects economic efficiency and impairs system reliability. The first part of the thesis addresses a central problem of transmission investment which is to model market signals for transmission adequacy. The proposed system simulation framework, combined with the stochastic price model, provides a powerful tool for capturing the characteristics of market prices dynamics and evaluating transmission investment. Numerical experiments with the IEEE RTS24 system yield interesting insights. In contrast with the common practice of using DC power flow formulations for market dispatch, we advocate the use of an AC power flow formulations instead since it allocates transmission losses correctly and reveals the economic incentives of voltage requirements. By incorporating reliability constraints in the market dispatch, the resulting market prices yield incentives for market participants to invest in additional transmission capacity. \n\u003C\/p\u003E\n\u003Cp\u003EIn electricity markets, generators seek to maximize their profits by simultaneously participating in multiple markets simultaneously. The uncertainties in market prices and different extents of market participations make generation capacity allocation a challenging task. The second part of the thesis presents a co-optimization modeling framework that incorporates market participation and market price uncertainties into the capacity allocation decision-making problem through a stochastic programming formulation. Optimal scenario-dependent generation scheduling strategies are obtained. The advantages of the proposed model are illustrated through a computational study with realistic data provided by a hydroelectric producer. \n\u003C\/p\u003E\n\u003Cp\u003EThe third part of the thesis is devoted to analyzing the risk premium present in the electricity day-ahead forward price over the real-time spot price. This study establishes a quantitative model for incorporating transmission congestion into the analysis of electricity day-ahead forward risk premium. Through simulations with a three-bus study-system, it is illustrated that the more frequently transmission congestion happens, the higher the forward prices get at the load buses. Evidences from empirical studies with the New York electricity market data confirm the significant statistical relationship between the day-ahead forward risk premium and the shadow price premiums on transmission flowgates. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Integrated Modeling of Electric Power System Operations and Electricity Market Risks with Applications","format":"limited_html"}],"field_summary_sentence":[{"value":"Integrated Modeling of Electric Power System Operations and Electricity Market Risks with Applications"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-03T17:30:00-04:00","event_time_end":"2006-10-03T01:00:00-04:00","event_time_end_last":"2006-10-03T01:00:00-04:00","gmt_time_start":"2006-10-03 21:30:00","gmt_time_end":"2006-10-03 05:00:00","gmt_time_end_last":"2006-10-03 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61602":{"#nid":"61602","#data":{"type":"event","title":"QCF Faculty candidate: Statistical Approaches to Option Pricing and Portfolio Management","body":[{"value":"\u003Cp\u003EFinancial mathematical models provide useful tools for option pricing.\u003Cbr \/\u003E\nThese\u003Cbr \/\u003E\nphysical models give us a good first order approximation to the\u003Cbr \/\u003E\nunderlying dynamics in the financial market.  Their power in option\u003Cbr \/\u003E\npricing can be significantly enhanced when they are combined\u003Cbr \/\u003E\nwith statistical approaches, which empirically learn and correct pricing errors\u003Cbr \/\u003E\nthrough estimating the state price densities.  In this talk,\u003Cbr \/\u003E\ntwo new semiparametric techniques are proposed for estimating state price\u003Cbr \/\u003E\ndensities and pricing financial derivatives.  Our empirical studies\u003Cbr \/\u003E\nbased on the options of SP500 index show our methods outperform\u003Cbr \/\u003E\nthe ad hoc Black-Scholes method and significantly so\u003Cbr \/\u003E\nwhen the latter method has large pricing errors,\u003Cbr \/\u003E\nbased on over 100,000 tests.\n\u003C\/p\u003E\n\u003Cp\u003EThe second part of the talk will focus on estimation high-dimensional\u003Cbr \/\u003E\ncovariance matrix for portfolio allocation and risk management.\u003Cbr \/\u003E\nMotivated by the Capital Asset Pricing Model, we propose to use\u003Cbr \/\u003E\na factor model to reduce the dimensionality and to estimate the\u003Cbr \/\u003E\ncovariance matrix.   The performance is compared with the sample\u003Cbr \/\u003E\ncovariance matrix. We demonstrate and identify the situations under which\u003Cbr \/\u003E\nthe factor approach can gain substantially the performance\u003Cbr \/\u003E\nand the cases where the gains are only marginal.\u003Cbr \/\u003E\nFurthermore, the impacts of the covariance matrix\u003Cbr \/\u003E\nestimation on portfolio allocation and risk management are studied.\u003Cbr \/\u003E\nThe theoretical results are convincingly supported by a\u003Cbr \/\u003E\nthorough simulation study.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"QCF Faculty candidate: Statistical Approaches to Option Pricing and Portfolio Management","format":"limited_html"}],"field_summary_sentence":[{"value":"QCF Faculty candidate: Statistical Approaches to Option Pricing and Portfolio Management"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-25T12:00:00-04:00","event_time_end":"2006-04-25T01:00:00-04:00","event_time_end_last":"2006-04-25T01:00:00-04:00","gmt_time_start":"2006-04-25 16:00:00","gmt_time_end":"2006-04-25 05:00:00","gmt_time_end_last":"2006-04-25 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61572":{"#nid":"61572","#data":{"type":"event","title":"Capital One Financial Services :: Career Information Session","body":[{"value":"\u003Cp\u003EThe sign up sheet it on the door of the academic area in the Groseclose Building.\n\u003C\/p\u003E\n\u003Cp\u003ECapital One is a Fortune 200 company providing access to credit to tens of millions worldwide.  We also provide auto, home and business loans, plus banking and other services. Statistical expertise is central to our success. Among thousands of scientifically trained professionals, over 100 statisticians ensure our governance and quality of statistics. They thrive in a culture of respect, rigor and innovation. Capital One seeks superior applied statisticians at all career stages. Go to \u003Ca href=\u0022capitalone.com\/careers\u0022\u003Ecapitalone.com\/careers\u003C\/a\u003E .\n\u003C\/p\u003E\n\u003Cp\u003ECapital One Financial Services will be visiting Georgia Tech on October 3 and October 4th  to discuss the Statistician department and positions in their organization.  There will be a presentation on Wednesday, October 4 from 3-4:30 in the Main Building, Executive Classroom, pizza and beverages will be served. \n\u003C\/p\u003E\n\u003Cp\u003EIn addition, interviews will conducted on October 5th from 9:00 a.m.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Capital One Financial Services :: Career Information Session","format":"limited_html"}],"field_summary_sentence":[{"value":"Capital One Financial Services :: Career Information Session"}],"uid":"27279","created_gmt":"2010-10-08 11:33:28","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-04T16:00:00-04:00","event_time_end":"2006-10-04T01:00:00-04:00","event_time_end_last":"2006-10-04T01:00:00-04:00","gmt_time_start":"2006-10-04 20:00:00","gmt_time_end":"2006-10-04 05:00:00","gmt_time_end_last":"2006-10-04 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61601":{"#nid":"61601","#data":{"type":"event","title":"Agency, Optimization, and Nonstandard Statistics","body":[{"value":"\u003Cp\u003EThe concept of agency (autonomous action) can and will be shown to have its roots in several scientific fields including ecology, economics, and statistical physics.  The application of this concept owes much to the availability of inexpensive and abundant computer power,  and has benefited from and contributed to the rise of a new branch of simulation science that buttresses the old stalwarts of theory and experiment.  It is also contributing to a new branch of mathematics that is algorithmic rather than analytic in nature.  Several applications will be discussed.\n\u003C\/p\u003E\n\u003Cp\u003EBruce Sawhill is a computer scientist who has developed the demand forecasting for DayJet a new company that will provide on-demand air transportation. Unlike traditional forecasting, the problem here is to estimate demand for a service that does not yet exist.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Agency, Optimization, and Nonstandard Statistics","format":"limited_html"}],"field_summary_sentence":[{"value":"Agency, Optimization, and Nonstandard Statistics"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-25T13:00:00-04:00","event_time_end":"2006-04-25T01:00:00-04:00","event_time_end_last":"2006-04-25T01:00:00-04:00","gmt_time_start":"2006-04-25 17:00:00","gmt_time_end":"2006-04-25 05:00:00","gmt_time_end_last":"2006-04-25 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61565":{"#nid":"61565","#data":{"type":"event","title":"ACO Distinguished Lecture Series","body":[{"value":"\u003Cp\u003ETo be added shortly\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ACO Distinguished Lecture Series","format":"limited_html"}],"field_summary_sentence":[{"value":"ACO Distinguished Lecture Series"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-04T17:00:00-04:00","event_time_end":"2006-10-04T01:00:00-04:00","event_time_end_last":"2006-10-04T01:00:00-04:00","gmt_time_start":"2006-10-04 21:00:00","gmt_time_end":"2006-10-04 05:00:00","gmt_time_end_last":"2006-10-04 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61603":{"#nid":"61603","#data":{"type":"event","title":"ISyE Faculty Meeting","body":[{"value":"\u003Cp\u003EAgenda to be distributed via email.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Faculty Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Faculty Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-27T12:00:00-04:00","event_time_end":"2006-04-27T01:00:00-04:00","event_time_end_last":"2006-04-27T01:00:00-04:00","gmt_time_start":"2006-04-27 16:00:00","gmt_time_end":"2006-04-27 05:00:00","gmt_time_end_last":"2006-04-27 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61570":{"#nid":"61570","#data":{"type":"event","title":"STOCHASTICS SEMINAR :: Balanced Explorative and Exploitative Search with Estimation for Simulation Optimization","body":[{"value":"\u003Cp\u003EWe discuss desirable features that optimization algorithms need to possess to exhibit good empirical performance when applied to solve simulation optimization problems possessing little known structure. Our approach emphasizes maintaining an appropriate balance between exploration, exploitation, and estimation. Exploration refers to searching the entire feasible region for promising solutions, exploitation refers to the search of improved solutions in promising subregions, and estimation refers to obtaining enhanced estimates of the objective function values at promising solutions. We also present two new random search methods that possess these desirable features, show their almost sure global convergence, and provide numerical results that show the attractive empirical behavior of the proposed methods.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STOCHASTICS SEMINAR :: Balanced Explorative and Exploitative Search with Estimation for Simulation Optimization","format":"limited_html"}],"field_summary_sentence":[{"value":"STOCHASTICS SEMINAR :: Balanced Explorative and Exploitative Search with Estimation for Simulation Optimization"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-04T17:30:00-04:00","event_time_end":"2006-10-04T01:00:00-04:00","event_time_end_last":"2006-10-04T01:00:00-04:00","gmt_time_start":"2006-10-04 21:30:00","gmt_time_end":"2006-10-04 05:00:00","gmt_time_end_last":"2006-10-04 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61563":{"#nid":"61563","#data":{"type":"event","title":"Statistics Seminar :: Bayesian Validation of Computer Models","body":[{"value":"\u003Cp\u003EComputer models are mathematic representations of real systems developed for understanding and investigating the systems. They are particularly useful when physical experiments of the systems are either cost prohibitive or time prohibitive. It is very important to validate computer models by comparing computer outputs and physical observations before the computer models are used. This paper proposes a Bayesian approach for computer model validation. The proposed approach overcomes several difficulties of a frequentist approach proposed in Oberkampf and Barone (2004).\n\u003C\/p\u003E\n\u003Cp\u003EKennedy and O\u0027Hagan (2001) propose a similar Bayesian approach for the calibration problem in computer model validation. The major difference between the two approaches is that Kennedy and O\u0027Hagan(2001) focus on deriving directly the posterior of the true output. Our approach focuses on first deriving the two posteriors of the computer model and the model bias (difference between computer and true outputs), and then derive the posterior of the true output as the sum of the two posteriors. As a result, our approach provides a clear decomposition of the expected prediction error of the true output. This decomposition explains why and how combining both computer output and physical experiments can provide more accurate prediction of the true output than using only computer outputs or only physical experiments.  Three examples are used to illustrate the proposed approach and to compare with the approach in Kennedy and O\u0027Hagan.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar :: Bayesian Validation of Computer Models","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar :: Bayesian Validation of Computer Models"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-05T12:00:00-04:00","event_time_end":"2006-10-05T01:00:00-04:00","event_time_end_last":"2006-10-05T01:00:00-04:00","gmt_time_start":"2006-10-05 16:00:00","gmt_time_end":"2006-10-05 05:00:00","gmt_time_end_last":"2006-10-05 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61599":{"#nid":"61599","#data":{"type":"event","title":"Thesis Defense :: Computer Experiments: Design, Modeling and Integration","body":[{"value":"\u003Cp\u003EIn recent years, computer experiments have become popular in engineering and scientific applications. The rapidly increasing use of computer models poses great challenges in the design, modeling and analysis of computer experiments. This thesis focuses on developing new methodologies that would meet some of the challenges in the field of computer experiments. It consists of four chapters.\n\u003C\/p\u003E\n\u003Cp\u003EIn Chapter 1, a new approach is taken to integrate data from approximate and detailed simulations to build a surrogate model that describes the relationship between output and input parameters. Experimental results from approximate simulations form the bulk of the data, and they are used to build a model based on a Gaussian process. The fitted model is then \u0022adjusted\u0022 by incorporating a small amount of data from detailed simulations to obtain a more accurate prediction model. The effectiveness of this approach is demonstrated with an example involving the design of cellular materials for an electronics cooling application.\n\u003C\/p\u003E\n\u003Cp\u003EChapter 2 deals with the development of a new Bayesian procedure for integrating low-accuracy and high-accuracy experiments. Standard practice in analyzing data from different types of experiments is to treat data from each type separately. By borrowing strength across multiple sources, an integrated analysis can produce better results. To this end, some Bayesian hierarchical Gaussian process models are proposed. The proposed method is illustrated with two examples: one with detailed and approximate finite elements simulations for mechanical material design and the other with physical and computer experiments for a fluidized bed process in the food industry to coat certain food products with additives.\n\u003C\/p\u003E\n\u003Cp\u003EChapter 3 is devoted to the introduction of a structural equation method for the temperature modeling in data center computer experiment. Temperature modeling is a key in designing and running a reliable data center with many computer components operating constantly and generating heat. How different configurations affect the data center thermal distribution is largely unknown. This is because the physical thermal process is complex, depending on many factors, and detailed temperature measurements are not monitored in actual data centers. It is possible to build physics-based mathematical models, implemented in computer code, to study the air movement and temperature distribution mechanisms.  A statistical method based on latent variables is introduced for analyzing the multivariate temperature readings produced by the computer experiment. A two-stage estimation procedure is developed for the proposed latent variable model by making use of sufficient statistics and pseud-likelihood method.\n\u003C\/p\u003E\n\u003Cp\u003EConstruction of designs for multiple experiments with different levels of accuracy is a new issue in design of experiments because traditional methods deal almost exclusively with a single experiment. In Chapter 4, a method is proposed for constructing nested space-filling designs for this type of multiple experiments. The construction is aided by the use of Galois field and orthogonal arrays. Multiple design sets generated by the proposed method are guaranteed to have some space-filling property.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Computer Experiments: Design, Modeling and Integration","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Computer Experiments: Design, Modeling and Integration"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-28T12:00:00-04:00","event_time_end":"2006-04-28T01:00:00-04:00","event_time_end_last":"2006-04-28T01:00:00-04:00","gmt_time_start":"2006-04-28 16:00:00","gmt_time_end":"2006-04-28 05:00:00","gmt_time_end_last":"2006-04-28 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61566":{"#nid":"61566","#data":{"type":"event","title":"Family Weekend Reception","body":[{"value":"\u003Cp\u003EThis is a reminder that Family Weekend at Tech is next weekend and we will be hosting a reception in the lobby of the Main Building on the 6th from 4-5 p.m. Paul will present a brief program in the Ex. Classroom and then we will have eats and drinks in the lobby. I encourage all faculty to make an appearance. We have about 50 people (parents) signed up to attend the reception and they love to talk with faculty! See you there!\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Family Weekend Reception","format":"limited_html"}],"field_summary_sentence":[{"value":"Family Weekend Reception"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-06T17:00:00-04:00","event_time_end":"2006-10-06T01:00:00-04:00","event_time_end_last":"2006-10-06T01:00:00-04:00","gmt_time_start":"2006-10-06 21:00:00","gmt_time_end":"2006-10-06 05:00:00","gmt_time_end_last":"2006-10-06 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61600":{"#nid":"61600","#data":{"type":"event","title":"Profit-Maximizing Pricing-Scheduling Policies in Queues","body":[{"value":"\u003Cp\u003EWe consider the problem of designing a profit-maximizing pricing-scheduling policy for a service facility serving heterogeneous customers with private information about their service value and time-sensitivity. Our main results are: (a) If customers belong to one of finitely many types, an optimal pricing-scheduling policy can be found in polynomial time under certain natural conditions on the problem data; and (b) If customer-types form a continuum, we characterize conditions under which a natural priority auction mechanism is optimal. This work lies at the interface of economics and queueing theory, and draws on techniques from these disciplines.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Profit-Maximizing Pricing-Scheduling Policies in Queues","format":"limited_html"}],"field_summary_sentence":[{"value":"Profit-Maximizing Pricing-Scheduling Policies in Queues"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-04-28T12:00:00-04:00","event_time_end":"2006-04-28T01:00:00-04:00","event_time_end_last":"2006-04-28T01:00:00-04:00","gmt_time_start":"2006-04-28 16:00:00","gmt_time_end":"2006-04-28 05:00:00","gmt_time_end_last":"2006-04-28 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61582":{"#nid":"61582","#data":{"type":"event","title":"ISyE Faculty Meeting","body":[{"value":"\u003Cp\u003ETo be distributed via email.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Faculty Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Faculty Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-07T10:00:00-05:00","event_time_end":"2006-12-06T23:00:00-05:00","event_time_end_last":"2006-12-06T23:00:00-05:00","gmt_time_start":"2006-12-07 15:00:00","gmt_time_end":"2006-12-07 04:00:00","gmt_time_end_last":"2006-12-07 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61573":{"#nid":"61573","#data":{"type":"event","title":"Picnic for ISyE Faculty\/Staff\/Ph.D.","body":[{"value":"\u003Cp\u003EWe are pleased to announce that the Fourth Annual ISyE Ph.D. Picnic will be held on Friday, October 6 from 4-7 P.M. on the IC Lawn, weather permitting.  For those of you who have been around the past couple of years, this is the continuation of the picnic tradition started by Brad Jones and company. \n\u003C\/p\u003E\n\u003Cp\u003EThis event is FREE FOR ISyE Ph.D. STUDENTS, FACULTY, AND STAFF.  We encourage people to bring their families and close friends, as one of our goals is to have a \u0022family-oriented\u0022 event.  However, to cover expenses, there is a nominal $3 fee for all adult guests.  There is no cost for children.\n\u003C\/p\u003E\n\u003Cp\u003EFood will be provided from a local Atlanta area establishment.  Please inform us if you have any dietary restrictions, so that we may plan accordingly.  Water and pop will be provided as well.  ALCOHOL IS PROHIBITED.\n\u003C\/p\u003E\n\u003Cp\u003EWe are also planning to have several activities, including soccer, frisbee, and a volleyball.  If enough interested faculty attend, a faculty vs student volleyball match will be arranged! \n\u003C\/p\u003E\n\u003Cp\u003EIf you would like to attend this event, please reply to \u003Ca href=\u0022mailto:cwardell@isye.gatech.edu\u0022\u003Ecwardell@isye.gatech.edu\u003C\/a\u003E no later than Tuesday, October 3rd, at 5 P.M. with the following information:\n\u003C\/p\u003E\n\u003Cp\u003EName:\u003Cbr \/\u003E\nYear in Program (2nd, 3rd, 4th, etc.):\u003Cbr \/\u003E\nArea of Concentration or Specialty (EDA, Optimization, Statistics, etc):\u003Cbr \/\u003E\nNumber of Adult Guests:\u003Cbr \/\u003E\nNumber of Children Guests:\n\u003C\/p\u003E\n\u003Cp\u003EWe also could use some volunteers to help with the following:\n\u003C\/p\u003E\n\u003Cp\u003E1.  Setup of tables and chairs at approximately 3:30 P.M.\u003Cbr \/\u003E\n2.  Volleyball setup at approximately 4:00 P.M.\u003Cbr \/\u003E\n3.  Clean-up from approximately 7:30-9:00 P.M.\n\u003C\/p\u003E\n\u003Cp\u003EIf you are available and are willing to volunteer for one or more of\u003Cbr \/\u003E\nthese, please indicate that in your reply as well.  Your help would be\u003Cbr \/\u003E\ngreatly appreciated.\n\u003C\/p\u003E\n\u003Cp\u003EThank you, and we look forward to enjoying your fellowship on Friday, October 6!!! :)\n\u003C\/p\u003E\n\u003Cp\u003ERegards,\u003Cbr \/\u003E\nThe GSAC (Graduate Student Advisory Committee)\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Picnic for ISyE Faculty\/Staff\/Ph.D.","format":"limited_html"}],"field_summary_sentence":[{"value":"Picnic for ISyE Faculty\/Staff\/Ph.D."}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-06T17:00:00-04:00","event_time_end":"2006-10-06T01:00:00-04:00","event_time_end_last":"2006-10-06T01:00:00-04:00","gmt_time_start":"2006-10-06 21:00:00","gmt_time_end":"2006-10-06 05:00:00","gmt_time_end_last":"2006-10-06 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61597":{"#nid":"61597","#data":{"type":"event","title":"THESIS DEFENSE :: High Volume Conveyor Sortation System Analysis","body":[{"value":"\u003Cp\u003EWe study the conveyor sortation system from performance evaluation and design perspectives employing continuous modeling approach. We present two continuous conveyor models with different level of accurary in a uniform mathematical framework. We study the accurarcy difference of these two representations and give rationales of generating this difference. We also conduct rigorous sensitivity analysis on these two models which lays the foundation to utilize them in optimization applications. Based on the Batch on conveyor Model, we develop a fast fluid simulation methogology. We address the feasibility of implementing fluid simulation from modeling capacilities , algorithm design and simulation performance in terms of accuracy and simulation time. From design perspective, we focus on rates determination and accumulation design in the accumulation and merge subsystem. The optimization problem is to find a minimum cost design that satisfies some predefined performance requirements under stochastic work environment. We first transfer this stochastic programming problem to a deterministic nonlinear programming problem through sample path based optimization method. Gradient based method is adopted to solve the deterministic problem. Since there is no close form for performance metric even for a deterministic input stream, we adopt continuous modeling to develop deterministic performance evaluation models and conduct sensitivity analysis on these models. We explore the prospects of using two continuous conveyor models we presented. We perform numerical experiments on a two conveyor segment tandem system which is the building block of more complex network. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: High Volume Conveyor Sortation System Analysis","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: High Volume Conveyor Sortation System Analysis"}],"uid":"27279","created_gmt":"2010-10-08 11:35:24","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-05-01T11:00:00-04:00","event_time_end":"2006-05-01T01:00:00-04:00","event_time_end_last":"2006-05-01T01:00:00-04:00","gmt_time_start":"2006-05-01 15:00:00","gmt_time_end":"2006-05-01 05:00:00","gmt_time_end_last":"2006-05-01 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61564":{"#nid":"61564","#data":{"type":"event","title":"STOCHASTICS SEMINAR :: TBA","body":[{"value":"\u003Cp\u003ETBA\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STOCHASTICS SEMINAR :: TBA","format":"limited_html"}],"field_summary_sentence":[{"value":"STOCHASTICS SEMINAR :: TBA"}],"uid":"27279","created_gmt":"2010-10-08 11:33:27","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-10T12:00:00-04:00","event_time_end":"2006-10-10T01:00:00-04:00","event_time_end_last":"2006-10-10T01:00:00-04:00","gmt_time_start":"2006-10-10 16:00:00","gmt_time_end":"2006-10-10 05:00:00","gmt_time_end_last":"2006-10-10 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61596":{"#nid":"61596","#data":{"type":"event","title":"THESIS DEFENSE :: Statistical Learning in Logistics and Manufacturing Systems","body":[{"value":"\u003Cp\u003EThis thesis focuses on the developing of statistical methodology in reliability and quality engineering, and to assist the decision-making in enterprise-level, process-level, and product-level.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Statistical Learning in Logistics and Manufacturing Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Statistical Learning in Logistics and Manufacturing Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:35:24","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-05-02T14:30:00-04:00","event_time_end":"2006-05-02T01:00:00-04:00","event_time_end_last":"2006-05-02T01:00:00-04:00","gmt_time_start":"2006-05-02 18:30:00","gmt_time_end":"2006-05-02 05:00:00","gmt_time_end_last":"2006-05-02 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61562":{"#nid":"61562","#data":{"type":"event","title":"STATISTICS SERIES :: Tuning Variable Selection Procedures","body":[{"value":"\u003Cp\u003ETwo new approaches to variable selection in regression are presented. The key idea in both approaches is to calibrate an existing tunable selection method in order to achieve desirable properties of selected models. Attention is restricted to forward selection for which the tuning parameter is the familiar alpha-to-enter. In the first approach, Noise Added Model Selection (NAMS), parametric bootstrap-like data sets are generated by incrementally adding noise to the response variable, and alpha is tuned by tracking the effect of added noise on selected models\u0027 mean squared errors for different alpha values. In the second approach, Variable Added Model Selection (VAMS), random phony predictor variables are added to the data set, and alpha is tuned by tracking the proportion of falsely included phony variables in the models selected for different alpha values.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SERIES :: Tuning Variable Selection Procedures","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SERIES :: Tuning Variable Selection Procedures"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-12T12:00:00-04:00","event_time_end":"2006-10-12T01:00:00-04:00","event_time_end_last":"2006-10-12T01:00:00-04:00","gmt_time_start":"2006-10-12 16:00:00","gmt_time_end":"2006-10-12 05:00:00","gmt_time_end_last":"2006-10-12 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61598":{"#nid":"61598","#data":{"type":"event","title":"SC\u0026L Seminar Series :: Design of a Distribution Network","body":[{"value":"\u003Cp\u003EAny supply chain has goods, which must be shipped from various origins to various destinations. For example, large retail stores like WalMart and Home Depot must coordinate shipments from many different suppliers to many different distribution centers (from which individual stores stock inventory). In general, the amount of goods provided by a particular supplier does not fill one truck. Hence shipping goods directly from one origin to one destination results in an inefficient use of resources. A better solution is to provide facilities known as crossdocks, from which multiple trucks can pick up goods from several different origins and deliver goods to several different destinations. Sorting of the goods occurs at the crossdock, so that any origin associated with a particular crossdock can supply goods to any destination associated with that crossdock, regardless of whether or not the same truck visits that origin and destination.\u003Cbr \/\u003E\nThe key to our approach is to approximate transportation costs before knowing exact crossdock locations. In particular, we assume crossdock locations are uniformly distributed in a rectangular region, and find the number of crossdocks that minimizes total cost.\n\u003C\/p\u003E\n\u003Cp\u003EPizza lunch will be supplied by TLI.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SC\u0026amp;L Seminar Series :: Design of a Distribution Network","format":"limited_html"}],"field_summary_sentence":[{"value":"SC\u0026L Seminar Series :: Design of a Distribution Network"}],"uid":"27279","created_gmt":"2010-10-08 11:35:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-05-04T16:00:00-04:00","event_time_end":"2006-05-04T01:00:00-04:00","event_time_end_last":"2006-05-04T01:00:00-04:00","gmt_time_start":"2006-05-04 20:00:00","gmt_time_end":"2006-05-04 05:00:00","gmt_time_end_last":"2006-05-04 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61560":{"#nid":"61560","#data":{"type":"event","title":"STATISTICS SEMINAR :: Feature Selection through Lasso: Blasso algorithm and model selection consistency","body":[{"value":"\u003Cp\u003EInformation technology advances are making data collection possible in most if not all fields of science and engineering and beyond. Often data reduction or feature selection is the first step towards solving current IT age problems. However, data reduction through model selection or l_0 constrained LS optimization leads to a combinatorial search which is computationally infeasible for massive data problems.  A computationally efficient alternative is the l_1 constrained LS optimization or Lasso optimization.\n\u003C\/p\u003E\n\u003Cp\u003EIn this talk, we first study the model selection property of Lasso in linear regression models.  We show that an Irrepresentable Condition on the design matrix is almost necessary and sufficient for the model selection consistency of Lasso for fixed p and p \u0026gt;\u0026gt; n cases, provided that the true model is sparse.  Moreover, we describe the Boosted Lasso (BLasso)algorithm  which produces an approximation to the complete regularization path of Lasso. BLasso consists of both a forward step and a backward step. The forward step is similar to Boosting and Forward Stagewise Fitting, but the backward step is new and crucial for BLasso to approximate the Lasso path in all situations. For cases with finite number of base learners, when the step size goes to zero, the BLasso path is shown to converge to the Lasso path. Finally, the Blasso algorithm is extended to give an approximate path for the case of a convex loss function plus a convex penalty. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Feature Selection through Lasso: Blasso algorithm and model selection consistency","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Feature Selection through Lasso: Blasso algorithm and model selection consistency"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-17T12:00:00-04:00","event_time_end":"2006-10-17T01:00:00-04:00","event_time_end_last":"2006-10-17T01:00:00-04:00","gmt_time_start":"2006-10-17 16:00:00","gmt_time_end":"2006-10-17 05:00:00","gmt_time_end_last":"2006-10-17 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61595":{"#nid":"61595","#data":{"type":"event","title":"ISyE Advisory Board Meeting and Dinner","body":[{"value":"\u003Cp\u003EThursday, May 11\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Advisory Board Meeting and Dinner","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Advisory Board Meeting and Dinner"}],"uid":"27279","created_gmt":"2010-10-08 11:35:24","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-05-11T01:00:00-04:00","event_time_end":"2006-05-11T01:00:00-04:00","event_time_end_last":"2006-05-11T01:00:00-04:00","gmt_time_start":"2006-05-11 05:00:00","gmt_time_end":"2006-05-11 05:00:00","gmt_time_end_last":"2006-05-11 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61559":{"#nid":"61559","#data":{"type":"event","title":"STATISTICS SEMINAR :: Recurrent Event Modeling and Statistical Analysis","body":[{"value":"\u003Cp\u003ERecurrent events occur in many scientific areas: engineering, reliability, biomedicine, public health, industry, and economics. Examples of recurrent events are failure of electronic and mechanical systems, nuclear power plant accidents, occurrence of shocks, hospitalization of a person with a chronic disease, re-occurrence of a tumor, outbreak of a disease, and the Dow Jones Industrial Average decreasing by at least 200 points during a trading day. The stochastic modeling and the appropriate statistical inference for such models are therefore of utmost importance. In this talk I will discuss several classes of models for recurrent events and discuss methods of inference for such models. Focus will be in the semi-parametric inference for such models. The statistical analysis of recurrent event models requires care and caution because in the monitoring of such events, informative censoring occurs because of a sum-quota accrual scheme, which also leads to the number of events observed per experimental unit to be informative. Some concrete applications will be also be illustrated.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Recurrent Event Modeling and Statistical Analysis","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Recurrent Event Modeling and Statistical Analysis"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-19T12:00:00-04:00","event_time_end":"2006-10-19T01:00:00-04:00","event_time_end_last":"2006-10-19T01:00:00-04:00","gmt_time_start":"2006-10-19 16:00:00","gmt_time_end":"2006-10-19 05:00:00","gmt_time_end_last":"2006-10-19 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61594":{"#nid":"61594","#data":{"type":"event","title":"ISyE Official School Dedication","body":[{"value":"\u003Cp\u003EJoin President Clough and the Georgia Tech community at 3:00 for the H. Milton Stewart School of Industrial and Systems Engineering \u0022Official School Dedication\u0022 in the lobby of the ISyE Main Building.\n\u003C\/p\u003E\n\u003Cp\u003EThis is a very special occasion for our School and we look forward to honoring and celebrating the Stewart Family.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Official School Dedication","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Official School Dedication"}],"uid":"27279","created_gmt":"2010-10-08 11:35:24","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-05-12T16:00:00-04:00","event_time_end":"2006-05-12T01:00:00-04:00","event_time_end_last":"2006-05-12T01:00:00-04:00","gmt_time_start":"2006-05-12 20:00:00","gmt_time_end":"2006-05-12 05:00:00","gmt_time_end_last":"2006-05-12 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61558":{"#nid":"61558","#data":{"type":"event","title":"Wireless Data Networks with Intra- and Inter-Cell Mobility","body":[{"value":"\u003Cp\u003EThe performance of wireless data systems has been thoroughly studied in the context of a single base station. In this talk we examine networks with several interacting base stations, and specifically investigate the capacity impact of intra- and inter-cell mobility. We consider a dynamic setting where users come and go over time as governed by random finite-size data transfers, and explicitly allow for users to roam around over the course of their service. It may be shown that mobility tends to increase the capacity, not only in case of globally optimal scheduling, but also when each of the base stations operates according to a fair sharing policy. We further demonstrate that the capacity region for globally optimal scheduling is in general strictly larger than the stability region for a fair sharing discipline. However, if the users distribute themselves so as to maximize their individual throughputs, thus enabling some implicit coordination, then a fair sharing policy is in fact guaranteed to achieve stability whenever a globally optimal strategy is able to do so. \n\u003C\/p\u003E\n\u003Cp\u003ENote: The talk is based on joint work with Nidhi Hegde and Alexandre Proutiere (France Telecom R\u0026amp;D). \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Wireless Data Networks with Intra- and Inter-Cell Mobility","format":"limited_html"}],"field_summary_sentence":[{"value":"Wireless Data Networks with Intra- and Inter-Cell Mobility"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-20T12:00:00-04:00","event_time_end":"2006-10-20T01:00:00-04:00","event_time_end_last":"2006-10-20T01:00:00-04:00","gmt_time_start":"2006-10-20 16:00:00","gmt_time_end":"2006-10-20 05:00:00","gmt_time_end_last":"2006-10-20 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61593":{"#nid":"61593","#data":{"type":"event","title":"SC\u0026L Seminar Series :: Single and Multi-floor Facility Layout Problem Based on Meta-heuristics Algorithm","body":[{"value":"\u003Cp\u003EBoth single-floor and multi-floor facility layout problems are discussed in this presentation. \n\u003C\/p\u003E\n\u003Cp\u003EAs the single-floor layout problem, simultaneous design of block and detailed layout based on location matrix is presented. The facility layout problem, as presented in the research literature and textbooks, is a two-stage process. In the first stage, the block layout, which specifies the relative location of departments, is produced. In the second stage, the detailed layout, which adds material handling aisles and Input\/Output station in the department, is determined. However, one problem with the two-stage approach is that some of the information needed in the first stage can only be derived once the second stage is solved. In order to overcome this problem, a new layout expression based on revised location matrix and some heuristics are proposed for the simultaneous design of block layout and detailed layout. The objective here is to minimize material handling cost. The material movements assume that they are transferred along the shortest distance aisle between the Input\/Output locations of those departments. \n\u003C\/p\u003E\n\u003Cp\u003EAs the multi-floor layout problem, a new layout model to consider initial cost and running cost simultaneously is presented. Numerous papers of facility layout problem have been published, and most of their objective functions are minimization of the running cost, namely the material handling cost between departments. They ignore the initial cost, such as land and construction costs, because they regarded those factories as permanent facilities. However, initial cost has a decisive impact on factory construction projects, because the life of factories has become shorter as the useful life of products decreases due to the rapid advancement of technology. Manufacturers try to remain competitive by lowering the initial cost of factory building projects. In this multi-floor model, the construction cost is introduced and that is varied in accordance with the location of departments in multi-storied facilities. Together with the conventional material handling cost between departments, multi-objective combinatorial optimization problem is solved with Genetic Algorithm based approach to find Pareto optimal solutions for this new layout model. \n\u003C\/p\u003E\n\u003Cp\u003EPizza lunch will be served by TLI.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SC\u0026amp;L Seminar Series :: Single and Multi-floor Facility Layout Problem Based on Meta-heuristics Algorithm","format":"limited_html"}],"field_summary_sentence":[{"value":"SC\u0026L Seminar Series :: Single and Multi-floor Facility Layout Problem Based on Meta-heuristics Algorithm"}],"uid":"27279","created_gmt":"2010-10-08 11:34:32","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-06-01T12:00:00-04:00","event_time_end":"2006-06-01T01:00:00-04:00","event_time_end_last":"2006-06-01T01:00:00-04:00","gmt_time_start":"2006-06-01 16:00:00","gmt_time_end":"2006-06-01 05:00:00","gmt_time_end_last":"2006-06-01 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61557":{"#nid":"61557","#data":{"type":"event","title":"SCL SEMINAR SERIES :: Supply Chain and Logistics Planning of Platform","body":[{"value":"\u003Cp\u003EProducts: Value of Demand Information on Supply Chains \n\u003C\/p\u003E\n\u003Cp\u003EIn this research, we focus on the production and inventory planning of platform products. We define \u0022platform product\u0022 as a group of components (or products) that are separately available to the market, but designed to perform better when assembled and\/or used together. Our motivation is the latest trend in the semiconductor industry, that is projected to have over $250B in sales in 2006, to provide platform products that consist of components (i.e. CPU, Chipset, Wireless) that are validated to work together more efficiently in terms of higher performance with lower energy consumption.\n\u003C\/p\u003E\n\u003Cp\u003EAn ARENA supply chain simulation model and an ILOG OPL production planning optimization model are integrated together with VBA codes to create a software laboratory to try our scenarios. The current setting is that the supplier of platform products is managing its supply chain on component level. Therefore, the order processing, forecasting, production planning and inventory management are all done separately (with minimal coordination) for each component that are required\/ordered at different times in the customer\u0027s manufacturing process. We are looking at a scenario where the orders from customers are received as platform orders, therefore having advanced demand information on platform level. We will quantify the value of this information at a supply chain level and explore the dynamics of platform products supply chains.\n\u003C\/p\u003E\n\u003Cp\u003EPizza and refreshments sponsored by The Logistics Institute. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR SERIES :: Supply Chain and Logistics Planning of Platform","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR SERIES :: Supply Chain and Logistics Planning of Platform"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-20T13:00:00-04:00","event_time_end":"2006-10-20T01:00:00-04:00","event_time_end_last":"2006-10-20T01:00:00-04:00","gmt_time_start":"2006-10-20 17:00:00","gmt_time_end":"2006-10-20 05:00:00","gmt_time_end_last":"2006-10-20 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61592":{"#nid":"61592","#data":{"type":"event","title":"Thesis Defense :: Inventory Control in a Build-to-Order Environment","body":[{"value":"\u003Cp\u003EThis dissertation consists of three independent sections:  In the first part, focusing on the auto industry we look at the challenges and solution strategies of employing build-to-order (BTO) with global supply. We consider some familiar tools for managing domestic supply and exploit them for managing international supply, and propose some alternative new methods. We study frequency of supply as a way to improve performance in global supply operations. We study the impact of forecast accuracy, and conclude that improvements there alone may not be sufficient to obtain desired savings. In fact, our analysis strongly suggests that reducing the level of demand detail communicated to distant suppliers can simultaneously improve their quality of service and reduce their cost in providing it.Within this perspective we look at a new shipping policy, \u0027\u0027Ship-to-Average\u0022, which prescribes sending a fixed quantity, based on the long term average forecast, with each shipment and making adjustments only if the inventory strays outside a prescribed range.\n\u003C\/p\u003E\n\u003Cp\u003EIn the second part we look at a Brownian control problem. When a manufacturer places repeated orders with a supplier to meet changing production requirements, he faces the challenge of finding the right balance between holding costs and the operational costs involved in adjusting the shipment sizes.  Consider a storage system whose content fluctuates as a Brownian motion in the absence of control. A linear holding cost is incurred continuously.  Inventory level can be adjusted by any quantity at a fixed plus proportional cost. We show control band policies are optimal for the average cost problem and calculate the optimal policy parameters. This form of policy is described by three parameters q, Q, S. When the inventory falls to 0 (rises to S), the controller expedites (curtails) shipments to return it to q (Q). Developing techniques based on Lagrangian relaxation we show that this type of policy is optimal even with constraints on the size of adjustments and on the maximum inventory level.  \n\u003C\/p\u003E\n\u003Cp\u003EThe Brownian Control problem can be viewed as an idealization --without delivery delays, of the problem of supplying BTO operations, and provides some theoretical explanation for the observed performance of Ship-to-Average policies. In fact, Ship-to-Average policies are a practical implementation of Control Band policies in the setting with delivery delays.\n\u003C\/p\u003E\n\u003Cp\u003EFinally, we explore the power and applicability of the Lagrangian approach developed in the second part in more detail, demonstrate specific technical characteristics and describe additional applications. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Inventory Control in a Build-to-Order Environment","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Inventory Control in a Build-to-Order Environment"}],"uid":"27279","created_gmt":"2010-10-08 11:34:32","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-06-16T10:00:00-04:00","event_time_end":"2006-06-16T01:00:00-04:00","event_time_end_last":"2006-06-16T01:00:00-04:00","gmt_time_start":"2006-06-16 14:00:00","gmt_time_end":"2006-06-16 05:00:00","gmt_time_end_last":"2006-06-16 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61556":{"#nid":"61556","#data":{"type":"event","title":"STATISTICS SEMINAR :: Jumps in Financial markets: a new nonparametric test and jump dynamics","body":[{"value":"\u003Cp\u003EIn this talk, we introduce a new nonparametric test to detect jump arrival times and realized jump sizes in asset prices up to the intra-day level. We demonstrate that the likelihood of misclassification of jumps becomes negligible when we use high-frequency returns. Using our test, we examine jump dynamics and their distributions in the U.S. equity markets. The results show that individual stock jumps are associated with pre-scheduled earnings announcements and other company-specific news events. Additionally, S\u0026amp;P 500 Index jumps are associated with general market news announcements. This suggests different pricing models for individual equity options versus index options.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Jumps in Financial markets: a new nonparametric test and jump dynamics","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Jumps in Financial markets: a new nonparametric test and jump dynamics"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-24T12:00:00-04:00","event_time_end":"2006-10-24T01:00:00-04:00","event_time_end_last":"2006-10-24T01:00:00-04:00","gmt_time_start":"2006-10-24 16:00:00","gmt_time_end":"2006-10-24 05:00:00","gmt_time_end_last":"2006-10-24 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61590":{"#nid":"61590","#data":{"type":"event","title":"Thesis Defense :: Contributions to the Analysis of Experiments Using Empirical Bayes Techniques","body":[{"value":"\u003Cp\u003ESpecifying a prior distribution for the large number of parameters in the linear statistical model is a difficult step in the Bayesian approach to the design and analysis of experiments. Here we address this difficulty by proposing the use of functional priors and then by working out important details for three and higher level experiments.  One of the challenges presented by higher level experiments is that a factor can be either qualitative or quantitative.  We propose appropriate correlation functions and coding schemes so that the prior distribution is simple and the results easily interpretable. The prior incorporates well known experimental design principles such as effect hierarchy and effect heredity, which helps to automatically resolve the aliasing problems experienced in fractional designs.\n\u003C\/p\u003E\n\u003Cp\u003EThe second part of the thesis focuses on the analysis of optimization experiments. Not uncommon are designed experiments with their primary purpose being to determine optimal settings for all of the factors in some predetermined set.  Here we distinguish between the two concepts of statistical significance and practical significance.  We perform estimation via an empirical Bayes data analysis methodology that has been detailed in the recent literature.  But then propose an alternative to the usual next step in determining optimal factor level settings.\u003Cbr \/\u003E\nInstead of implementing variable or model selection techniques, we propose an objective function that assists in our  goal of finding the ideal settings for all factors over which we experimented.  The usefulness of the new approach is illustrated through the analysis of some real experiments as well as simulation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Contributions to the Analysis of Experiments Using Empirical Bayes Techniques","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Contributions to the Analysis of Experiments Using Empirical Bayes Techniques"}],"uid":"27279","created_gmt":"2010-10-08 11:34:32","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-06-21T14:00:00-04:00","event_time_end":"2006-06-21T01:00:00-04:00","event_time_end_last":"2006-06-21T01:00:00-04:00","gmt_time_start":"2006-06-21 18:00:00","gmt_time_end":"2006-06-21 05:00:00","gmt_time_end_last":"2006-06-21 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61561":{"#nid":"61561","#data":{"type":"event","title":"QCF SEMINAR SERIES :: Energy Derivatives: New Developments and Challenges","body":[{"value":"\u003Cp\u003EThe last twenty years have witnessed the deregulation of the energy   markets, particularly the natural gas and power markets. The direct result   of the deregulation has been the need for development of analytical tools   that would allow market participants to manage new risks induced by the   deregulated markets and to protect the value of energy assets, such as   power plants, gas storage and pipelines, from exposure to market price   fluctuations. This presentation gives a detailed account of various risks   encountered in the energy markets, introduces methods of managing these   risks and describes analytical approaches to modeling energy price   behavior. Special attention is given to the recent developments in energy   markets and new trends in energy derivatives.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"QCF SEMINAR SERIES :: Energy Derivatives: New Developments and Challenges","format":"limited_html"}],"field_summary_sentence":[{"value":"QCF SEMINAR SERIES :: Energy Derivatives: New Developments and Challenges"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-27T12:00:00-04:00","event_time_end":"2006-10-27T01:00:00-04:00","event_time_end_last":"2006-10-27T01:00:00-04:00","gmt_time_start":"2006-10-27 16:00:00","gmt_time_end":"2006-10-27 05:00:00","gmt_time_end_last":"2006-10-27 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61591":{"#nid":"61591","#data":{"type":"event","title":"Thesis Defense :: Modeling and Analysis of Complex Technology Adoption Decisions:  An Investigation in the Domain of Mobile ICT","body":[{"value":"\u003Cp\u003ENot submitted.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Modeling and Analysis of Complex Technology Adoption Decisions:  An Investigation in the Domain of Mobile ICT","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Modeling and Analysis of Complex Technology Adoption Decisions:  An Investigation in the Domain of Mobile ICT"}],"uid":"27279","created_gmt":"2010-10-08 11:34:32","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-06-22T18:00:00-04:00","event_time_end":"2006-06-22T01:00:00-04:00","event_time_end_last":"2006-06-22T01:00:00-04:00","gmt_time_start":"2006-06-22 22:00:00","gmt_time_end":"2006-06-22 05:00:00","gmt_time_end_last":"2006-06-22 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61554":{"#nid":"61554","#data":{"type":"event","title":"SCL SEMINAR SERIES :: Local Search in Maximum Flow Network Interdiction","body":[{"value":"\u003Cp\u003EWe investigate the effectiveness of local search for the Maximum Flow Network Interdiction Problem (MFNIP). Our goal is to develop powerful meta-heuristics that consistently obtain good solutions in a timely fashion. In this talk, some results on the integrality gap of Wood\u0027s formulation of MFNIP will be discussed along with two neighborhoods. The first is a node-flip neighborhood that focuses on cut-sets and the second is an arc-flip neighborhood that focuses on maximum flows. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR SERIES :: Local Search in Maximum Flow Network Interdiction","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR SERIES :: Local Search in Maximum Flow Network Interdiction"}],"uid":"27279","created_gmt":"2010-10-08 11:33:25","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-27T13:00:00-04:00","event_time_end":"2006-10-27T01:00:00-04:00","event_time_end_last":"2006-10-27T01:00:00-04:00","gmt_time_start":"2006-10-27 17:00:00","gmt_time_end":"2006-10-27 05:00:00","gmt_time_end_last":"2006-10-27 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61589":{"#nid":"61589","#data":{"type":"event","title":"Thesis Defense :: State Space Collapse in Many-Server Diffusion Limits of Parallel Server Systems and Applications","body":[{"value":"\u003Cp\u003EWe consider a class of queueing systems that consist of server pools in parallel and multiple customer classes. Customer service times are assumed to be exponentially distributed. We study the asymptotic behavior of these queueing systems in a heavy traffic regime that is known as the Halfin and Whitt many-server asymptotic regime. Our main contribution is a general framework for establishing state space collapse results in the Halfin and Whitt many-server asymptotic regime for parallel server systems having multiple customer classes. In our work, state space collapse refers to a decrease in the dimension of the processes tracking the number of customers in each class waiting for service and the number of customers in each class being served by various server pools. We define and introduce a state space collapse function, which governs the exact details of the state space collapse. Our notion of state space collapse contrasts with that in Harrison and Van Mieghem [36], which establishes a deterministic relationship between a lower-dimensional workload process and the queue length processes. Our methodology is similar in spirit to that in Bramson [13]; however, Bramson studies an asymptotic regime in which the number of servers is fixed and Bramson does not require a state space collapse function.\n\u003C\/p\u003E\n\u003Cp\u003EWe illustrate the applications of our results in three different parallel server systems. The first system is a distributed parallel server system under the minimum-expected-delay faster-server-first (MED-FSF) or minimum-expected-delay load-balancing (MED-LB) policies. We prove that the MED-FSF policy minimizes the stationary distribution of total number of customers in the system. However, under the MED-FSF policy all the servers in our distributed system except those with the lowest service rate experience 100% utilization; but under the MED-LB policy, on the other hand, the utilizations of all the server pools are equal. We also show that under both policies the system performs as well as a corresponding single queue system. The second system we consider is known as the N-model. We show that when the service times only depend on the server pool providing service a static priority rule is asymptotically optimal. The optimality is in terms of stochastically minimizing linear holding costs over any finite time interval. Finally, we study two results conjectured in the literature for V-systems. First, we prove a state space collapse result conjectured in Armony and Maglaras [3]. Then, we propose a policy whose asymptotic performance is arbitrarily close to the conjectured performance of the policy proposed by Milner and Olsen [53] and prove a state space collapse result under this policy. We show for all of these systems that the conditions on the hydrodynamic limits can easily be checked using the standard toolsthat have been developed in the literature to analyze fluid models.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: State Space Collapse in Many-Server Diffusion Limits of Parallel Server Systems and Applications","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: State Space Collapse in Many-Server Diffusion Limits of Parallel Server Systems and Applications"}],"uid":"27279","created_gmt":"2010-10-08 11:34:32","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-06-30T15:00:00-04:00","event_time_end":"2006-06-30T01:00:00-04:00","event_time_end_last":"2006-06-30T01:00:00-04:00","gmt_time_start":"2006-06-30 19:00:00","gmt_time_end":"2006-06-30 05:00:00","gmt_time_end_last":"2006-06-30 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61555":{"#nid":"61555","#data":{"type":"event","title":"SCL SEMINAR SERIES :: Models of Spot Markets and Longer Term Contracts","body":[{"value":"\u003Cp\u003EThis work considers a setting in which products can be bought and sold on a spot market or by entering into contracts in advance of demand realization. Various people have studied the interaction between contracts and spot markets. We consider the effect of different market structures, and of spot market participation rates, on the amounts transacted via contracts and on the spot market, and on the surpluses of the sellers and buyers. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR SERIES :: Models of Spot Markets and Longer Term Contracts","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR SERIES :: Models of Spot Markets and Longer Term Contracts"}],"uid":"27279","created_gmt":"2010-10-08 11:33:26","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-27T13:00:00-04:00","event_time_end":"2006-10-27T01:00:00-04:00","event_time_end_last":"2006-10-27T01:00:00-04:00","gmt_time_start":"2006-10-27 17:00:00","gmt_time_end":"2006-10-27 05:00:00","gmt_time_end_last":"2006-10-27 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61585":{"#nid":"61585","#data":{"type":"event","title":"Thesis Defense :: Exponential Smoothing for Forecasting and Bayesian Validation of Computer Models","body":[{"value":"\u003Cp\u003EDespite their success and widespread usage in industry and business, ES methods have received little attention from the statistical community. We investigate three types of statistical models that have been found to underpin ES methods. They are ARIMA models, state space models with multiple sources of error (MSOE), and state space models with a single source of error (SSOE). We establish the relationship among the three classes of models and conclude that the class of SSOE state space models is broader than the other two and provides a formal statistical foundation for ES methods. To better understand ES methods, we investigate the behaviors of ES methods for time series generated from different processes. We mainly focus on time series of ARIMA type.\n\u003C\/p\u003E\n\u003Cp\u003EES methods forecast a time series using only its own history. To include covariates into ES methods for better forecasting a time series, we propose a new forecasting method, Exponential Smoothing with Covariates (ESCov). ESCov uses an ES method to model what left unexplained in a time series by covariates. We establish the optimality of ESCov, identify SSOE state space models underlying ESCov, and derive analytically the variances of forecasts by ESCov. Empirical studies show that ESCov outperforms ES methods and regression with ARIMA errors. We suggest a model selection procedure for choosing appropriate covariates and ES methods in practice.\n\u003C\/p\u003E\n\u003Cp\u003EComputer models have been commonly used to investigate complex systems for which physical experiments are highly expensive or very time-consuming. Before using a computer model, we need to address an important question ``How well does the computer model represent the real system?\u0022 The process of addressing this question is called computer model validation that generally involves the comparison of computer outputs and physical observations. In this thesis, we propose a Bayesian approach to computer model validation. This approach integrates together computer outputs and physical observation to give a better prediction of the real system output. This prediction is then used to validate the computer model. We investigate the impacts of several factors on the performance of the proposed approach and propose a generalization to the proposed approach.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Exponential Smoothing for Forecasting and Bayesian Validation of Computer Models","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Exponential Smoothing for Forecasting and Bayesian Validation of Computer Models"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-08-15T15:00:00-04:00","event_time_end":"2006-08-15T01:00:00-04:00","event_time_end_last":"2006-08-15T01:00:00-04:00","gmt_time_start":"2006-08-15 19:00:00","gmt_time_end":"2006-08-15 05:00:00","gmt_time_end_last":"2006-08-15 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61587":{"#nid":"61587","#data":{"type":"event","title":"All Campus Faculty Back to School Party","body":[{"value":"\u003Cp\u003EDear Faculty,\n\u003C\/p\u003E\n\u003Cp\u003EYou are invited to the first-ever all-campus faculty, back to school party at The Globe in Tech Square on Tuesday, August 22nd. \n\u003C\/p\u003E\n\u003Cp\u003EThis event is presented by the College of Computing Office of Communications and is sponsored by The Globe restaurant.  \n\u003C\/p\u003E\n\u003Cp\u003EThere will be entertainment, complimentary wine, beer, and hors d\u0027oeuvres from 5pm to 6:30pm. \n\u003C\/p\u003E\n\u003Cp\u003EPlan to stop by and kick off the new school year welcoming back your colleagues from CoE and around campus!\n\u003C\/p\u003E\n\u003Cp\u003ENo RSVP is necessary to attend...just show up! But if you have questions, please contact Stefany Wilson in CoC at 404-894-7253 or stefany at cc dot gatech dot edu.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"All Campus Faculty Back to School Party","format":"limited_html"}],"field_summary_sentence":[{"value":"All Campus Faculty Back to School Party"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-08-22T18:00:00-04:00","event_time_end":"2006-08-22T01:00:00-04:00","event_time_end_last":"2006-08-22T01:00:00-04:00","gmt_time_start":"2006-08-22 22:00:00","gmt_time_end":"2006-08-22 05:00:00","gmt_time_end_last":"2006-08-22 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61588":{"#nid":"61588","#data":{"type":"event","title":"ISyE Salad Social \u0026 Games","body":[{"value":"\u003Cp\u003EDetails sent out via email\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Salad Social \u0026amp; Games","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Salad Social \u0026 Games"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-08-25T12:45:00-04:00","event_time_end":"2006-08-25T01:00:00-04:00","event_time_end_last":"2006-08-25T01:00:00-04:00","gmt_time_start":"2006-08-25 16:45:00","gmt_time_end":"2006-08-25 05:00:00","gmt_time_end_last":"2006-08-25 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61583":{"#nid":"61583","#data":{"type":"event","title":"ISyE Faculty Meeting","body":[{"value":"\u003Cp\u003ETo be distributed via email.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Faculty Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Faculty Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-02T10:00:00-05:00","event_time_end":"2006-11-01T23:00:00-05:00","event_time_end_last":"2006-11-01T23:00:00-05:00","gmt_time_start":"2006-11-02 15:00:00","gmt_time_end":"2006-11-02 04:00:00","gmt_time_end_last":"2006-11-02 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61581":{"#nid":"61581","#data":{"type":"event","title":"STAT SEMINAR SERIES :: TCP Algorithms and Perpetuities","body":[{"value":"\u003Cp\u003EThe goal of this talk is to shed light on a connection between the probabilistic analysis of TCP protocols (used on the\u003Cbr \/\u003E\nInternet) and the exponential functional of a Levy (compound Poisson) process, which has received some attention in the mathematical finance literature. In that area, such functionals are known as perpetuities. We will first review the TCP application, and then derive several new distributional properties of perpetuities.\n\u003C\/p\u003E\n\u003Cp\u003EThis talk is based on ongoing work with Krishanu Maulik (ISI, Calcutta) and the following papers:\n\u003C\/p\u003E\n\u003Cp\u003EMaulik, Krishanu; Zwart, Bert Tail asymptotics for exponential functionals of Levy processes. Stochastic Process. Appl. 116 (2006), no. 2, 156--177 Guillemin, Fabrice; Robert, Philippe; Zwart, Bert AIMD algorithms and exponential functionals. Ann. Appl. Probab. 14 (2004), no. 1, 90--117.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STAT SEMINAR SERIES :: TCP Algorithms and Perpetuities","format":"limited_html"}],"field_summary_sentence":[{"value":"STAT SEMINAR SERIES :: TCP Algorithms and Perpetuities"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-08-30T17:30:00-04:00","event_time_end":"2006-08-30T01:00:00-04:00","event_time_end_last":"2006-08-30T01:00:00-04:00","gmt_time_start":"2006-08-30 21:30:00","gmt_time_end":"2006-08-30 05:00:00","gmt_time_end_last":"2006-08-30 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61579":{"#nid":"61579","#data":{"type":"event","title":"Thesis Defense :: Drayage Optimization in Truck\/Rail Networks","body":[{"value":"\u003Cp\u003EDaily drayage operations involve moving loaded or empty equipment between customer locations and rail ramps. Drayage orders are generally pickup and delivery requests with time windows. The repositioning of empty equipment may also be required in order to facilitate loaded movements.  The drayage orders are satisfied by a heterogeneous fleet of drivers.  Driver routes must satisfy various operational constraints.\n\u003C\/p\u003E\n\u003Cp\u003EIn the first part of the dissertation, our goal is to minimize the cost of daily drayage operations in a region on a given day. We present an optimization methodology for finding cost-effective schedules for regional daily drayage operations.  The core of the formulation is a set partitioning model whose columns represent routes.  Routes are added to the formulation by column generation.  We present numerical results for real-world data which demonstrate that our methodology produces low cost solutions in a reasonably short time.\n\u003C\/p\u003E\n\u003Cp\u003EThe second part of the dissertation addresses minimizing total empty mileage when driver capacity is not restrictive and new orders are added to the problem in an online fashion. We present a lower bound for the worst case guarantee of any deterministic online algorithm. We develop absolution methodology and provide results for the performance of different scheduling policies and parameters in a simulated environment.\n\u003C\/p\u003E\n\u003Cp\u003EIn the third part of the dissertation, we study a system with one rail ramp and one customer location which is served by a single driver. The problem has discrete time periods and at most one new order is released randomly each time period. The objective is to maximize the expected number of orders covered. With this simple problem, we seek to learn more about route planning for a single driver under uncertainty. We prove that carrying out an order if it is ready to be picked up at the driver\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Drayage Optimization in Truck\/Rail Networks","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Drayage Optimization in Truck\/Rail Networks"}],"uid":"27279","created_gmt":"2010-10-08 11:34:30","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-06T15:00:00-04:00","event_time_end":"2006-09-06T01:00:00-04:00","event_time_end_last":"2006-09-06T01:00:00-04:00","gmt_time_start":"2006-09-06 19:00:00","gmt_time_end":"2006-09-06 05:00:00","gmt_time_end_last":"2006-09-06 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61580":{"#nid":"61580","#data":{"type":"event","title":"Operations Research \u0026 Cyberinfrastructure","body":[{"value":"\u003Cp\u003EOperations Research \u0026amp; Cyberinfrastructure: Initiatives at the National Science Foundation\n\u003C\/p\u003E\n\u003Cp\u003EThe US National Science Foundation has established an Office of Cyberinfrastructure to coordinate and support the acquisition, development and provision of state-of-the-art cyberinfrastructure resources, tools and services essential to the conduct of 21st century science and engineering research and education. The speaker will outline the activities of this office, and their relevance to Operations Research.\n\u003C\/p\u003E\n\u003Cp\u003EStephen Nash is a program director for OR at the NSF. There are slots open for him to have individual or group meetings. If you or a group of you would like to meet with him, please Jim Dai or Hayriye Ayhan know. They will try their best to work out a feasible schedule. They apologize in advance in case some of you could not be scheduled.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Operations Research \u0026amp; Cyberinfrastructure","format":"limited_html"}],"field_summary_sentence":[{"value":"Operations Research \u0026 Cyberinfrastructure"}],"uid":"27279","created_gmt":"2010-10-08 11:34:31","changed_gmt":"2016-10-08 01:52:35","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-09-07T12:00:00-04:00","event_time_end":"2006-09-07T01:00:00-04:00","event_time_end_last":"2006-09-07T01:00:00-04:00","gmt_time_start":"2006-09-07 16:00:00","gmt_time_end":"2006-09-07 05:00:00","gmt_time_end_last":"2006-09-07 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61551":{"#nid":"61551","#data":{"type":"event","title":"GTBN presents Transforming Your Companys Sales and Marketing DNA: Responding to todays business environment","body":[{"value":"\u003Cp\u003EGreat companies understand why problems exist and follow a systemic  approach to addressing the real  causes. By doing this, companies transform their DNA and enjoy sustainable  revenue growth in a global economy. Our panel of experts will offer compelling  insight regarding sales, marketing, communication, and strategic thinking. Join  us for this exciting program as we explore:\u003C\/p\u003E\n\u003Cp\u003E \u003Cstrong\u003EAlignment:\u003C\/strong\u003E\u0026nbsp; Aligning marketing and sales functions to  support and integrate a solution-oriented approach boosts potential to improve  revenue. A successful organization is aligned to consistently address customer problems and needs better than its  competitor.\u0026nbsp; \u003Cbr \/\u003E\u003Cbr \/\u003E\n    \u003Cstrong\u003ECommoditization and Globalization:\u003C\/strong\u003E\u0026nbsp; Competition continues to  intensify and challenge sustained growth. The rapid emergence of the global  economy has accelerated the commoditization path. Companies struggle to  differentiate their offerings among increased competition. \u003Cbr \/\u003E\u003Cbr \/\u003E\n    Panelists and speakers for this event include:\n\u003C\/p\u003E\n\u003Col\u003E\n\u003Cli\u003E\u003Cstrong\u003ENick Lurie\u003C\/strong\u003E, Marketing Professor, Georgia Tech (Moderator) \u003C\/li\u003E\n\u003Cli\u003E\u003Cstrong\u003EBob Sanchez\u003C\/strong\u003E, President and CEO, Sales  Performance International\u003C\/li\u003E\n\u003Cli\u003E\u003Cstrong\u003EMaryanne Hancock\u003C\/strong\u003E,\u0026nbsp; CRM Director,  McKinsey\u003C\/li\u003E\n\u003Cli\u003E\u003Cstrong\u003EJim Dickie\u003C\/strong\u003E, President, CSO Insights\u003C\/li\u003E\n\u003Cli\u003E\u003Cstrong\u003EPhil Regnault\u003C\/strong\u003E, VP CRM Alliances, Oracle  Corporation\u003C\/li\u003E\n\u003Cli\u003E\u003Cstrong\u003EAlison Hague\u003C\/strong\u003E, Sales Training Manager\u003C\/li\u003E\n\u003C\/ol\u003E\n\n\u003Cp\u003EJoin GTBN as we explore the following questions and  more with our exceptional panel:\u003Cbr \/\u003E\n\u003Cbr \/\u003E\n\u003Cem\u003EIs your revenue  performance consistently above expectations?\u003C\/em\u003E\u003Cbr \/\u003E\u003Cbr \/\u003E\n    \u003Cem\u003EDoes your sales force know  how to position value and use your marketing messages correctly and  consistently? \u003C\/em\u003E\u003Cbr \/\u003E\u003Cbr \/\u003E\n    \u003Cem\u003EAre your value messages  reaching customers through the sales force?\u003C\/em\u003E\u003Cbr \/\u003E\u003Cbr \/\u003E\n    \u003Cem\u003EAre you truly a  problem-solving organization?\u003C\/em\u003E\u003Cbr \/\u003E\u003Cbr \/\u003E\n    \u003Cem\u003ECan you address your customers\u0026rsquo; needs better than your competitors?\u003C\/em\u003E\u003C\/p\u003E\n\u003Cp\u003EPlease click on the following a link to download a copy of the press release containing additional details about the event (MS Word format):\u003C\/p\u003E\n\u003Ch3\u003E\u003Ca href=\u0022http:\/\/www.isye.gatech.edu\/news-events\/special\/gtbn\/gtbn_press_release.doc\u0022\u003EEvent Details\u003C\/a\u003E\u003C\/h3\u003E\n\u003Cp\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"GTBN presents Transforming Your Company","format":"limited_html"}],"field_summary_sentence":[{"value":"GTBN presents Transforming Your Company"}],"uid":"27279","created_gmt":"2010-10-08 11:32:29","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-09T17:00:00-05:00","event_time_end":"2006-11-08T23:00:00-05:00","event_time_end_last":"2006-11-08T23:00:00-05:00","gmt_time_start":"2006-11-09 22:00:00","gmt_time_end":"2006-11-09 04:00:00","gmt_time_end_last":"2006-11-09 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61546":{"#nid":"61546","#data":{"type":"event","title":"STATISTICS SEMINAR :: Analysis and Design of HIV Viral Dynamic Studies","body":[{"value":"\u003Cp\u003EI will give a brief introduction to the biology of HIV and related dynamical systems problems. This will include a description of statistical methods used for analyzing data when the outcome of interest is a parameter in a dynamical system. I will then describe associated study design problems and discuss the use of sensitivity analysis and the Fisher Information Matrix to address study design and analysis when the outcome of interest is a parameter in a dynamical system. While the examples in this talk are all drawn from the HIV research literature, the methods are applicable to any problem involving design, parameter estimation (inverse problem) and inference, when outcomes of interest are parameters in systems of ordinary differential equations.\n\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EBio\u003C\/strong\u003E\u003Cbr \/\u003E\nProfessor Sarah Holte from the Fred Hutchinson Cancer Research Center (FHCRC) and the University of Washington (UW), Seattle, WA will visit ISyE on Thursday and Friday (Nov 9 and 10).  Professor Holte is the associate director of the Biostatistics Core of the UW\/FHCRC Center for AIDS Research (CFAR). She got her PhD in mathematics (topology), and switched to biostatistics around ten years ago. Some believe she has a natural ability to \u0022translate\u0022 biological problems into mathematics \/ statistics problems.\n\u003C\/p\u003E\n\u003Cp\u003EIf you or a group of you would like to meet with her on either this Thursday (Nov 9) or this Friday (Nov 10), please email Yajun Mei at  \u003Ca href=\u0022mailto:ymei@isye.gatech.edu\u0022\u003Eymei@isye.gatech.edu\u003C\/a\u003E to work out a feasible schedule.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Analysis and Design of HIV Viral Dynamic Studies","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Analysis and Design of HIV Viral Dynamic Studies"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-10T11:00:00-05:00","event_time_end":"2006-11-09T23:00:00-05:00","event_time_end_last":"2006-11-09T23:00:00-05:00","gmt_time_start":"2006-11-10 16:00:00","gmt_time_end":"2006-11-10 04:00:00","gmt_time_end_last":"2006-11-10 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61543":{"#nid":"61543","#data":{"type":"event","title":"THESIS DEFENSE :: Routing and Scheduling with Time Windows: Models and Algorithms for Tramp Sea Cargo and Rail Blocks","body":[{"value":"\u003Cp\u003EThis thesis introduces a new model formulation to solve routing and scheduling problems, with the main applications in answering routing and scheduling problems faced by a sea-cargo shipping company and a railroad company.\n\u003C\/p\u003E\n\u003Cp\u003EFor the work in sea-cargo routing and scheduling, we focus our methodology on the tramp shipping operation.  Tramp shipping is a demand-driven type of shipping operation which does not have fixed schedules. The schedules are based on the pickup and download locations of profitable service requests. The problem is that given a set of products distributed among a set of ports, with each product having pickup and download time windows and a destination port, find the schedule for a fleet of ships that maximizes profit for a specified time horizon. The problem is modeled as a Mixed Integer Non-Linear Program and reformulated as a Mixed Integer Linear Program.  Three heuristic methods, along with computational results, are presented.  We also exploit the special structure enjoyed by our model and introduce an upper-bounding problem to the model.  With a little modification, the model is readily extendable to reflect soft time windows and inter-ship cargo-transfers.\n\u003C\/p\u003E\n\u003Cp\u003EThe other part of our work is the work in train routing and scheduling. A typical train shipment consists of a set of cars having the common origin and destination. To reduce the handling of individual shipments as they travel, shipments are grouped into blocks.  The problem is that given a set of blocks to be carried from origins to destinations, construct the most cost effective train routes and schedules and determine block-to-train assignments, such that the number of block transfers (block swaps) between trains, the number of trains used, and some other cost measures are minimized. The same modeling technique, with extra precedence requirements, is used.  Computational results are presented. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Routing and Scheduling with Time Windows: Models and Algorithms for Tramp Sea Cargo and Rail Blocks","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Routing and Scheduling with Time Windows: Models and Algorithms for Tramp Sea Cargo and Rail Blocks"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-10T14:00:00-05:00","event_time_end":"2006-11-09T23:00:00-05:00","event_time_end_last":"2006-11-09T23:00:00-05:00","gmt_time_start":"2006-11-10 19:00:00","gmt_time_end":"2006-11-10 04:00:00","gmt_time_end_last":"2006-11-10 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61544":{"#nid":"61544","#data":{"type":"event","title":"THESIS DEFENSE :: Planning Robust Freight Transportation Operations","body":[{"value":"\u003Cp\u003EThe focus of this dissertation are problems of fleet management in freight transportation systems. Effective management requires both effective planning and control decisions. Plans are often generated using estimates of how the system will evolve in the future; during execution, control decisions need to be made to account for differences between actual realizations and estimates. The benefits of plans designed to satisfy customer demands at minimum cost can be negated by performing costly adjustments during the operational phase. Plans should prepare the system appropriately for the uncertain conditions to be faced during future operation. A planning approach that permits effective control during execution is proposed in this dissertation. This approach is inspired by recent work in robust optimization. \n\u003C\/p\u003E\n\u003Cp\u003EWe develop concepts and methodologies that are applied in two fundamental problem areas: (i) dynamic asset management and (ii) vehicle routing. \n\u003C\/p\u003E\n\u003Cp\u003EIn practice, the fleet management planning and control problem is usually decomposed in two parts; the problem of repositioning empty units to account for flow imbalances, and the problem of allocating units to customer demands and handling the corresponding loaded moves. An alternative integrated dynamic model for asset management problems is formulated as large-scale multicomodity flow problem in a time-discretized network. A computational study provides evidence that operating costs and fleet sizes may be significantly reduced with the integrated approach. However, results also illustrate how a model that does not consider the inherent demand uncertainty generates fragile plans in which serving realized customer demand can be either impossible or very costly. We then propose a planning approach for the empty repositioning problem that incorporates demand and supply uncertainty at every period of the planning horizon using interval around nominal forecasted parameters. The intervals define the uncertainty space for which buffers need to be built into the plan in order to make it a robust plan. A plan is said to be robust with respect to a deviation from forecasted nominal values if there exists a set of feasible control decisions drawn from a restricted control space. Computational evidence suggests that this approach is tractable. \n\u003C\/p\u003E\n\u003Cp\u003EThe traditional approach to address the Vehicle Routing Problem with Stochastic Demands (VRPSD) is through expectation minimization of the cost function. Although this approach is useful for building fixed routes with low expected cost, it does not directly consider the maximum potential cost that a vehicle might incur when traversing the tour. Our approach aims at minimizing the maximum cost. Computational experiments show that our robust optimization approach generates solutions with expected costs that compare favorably to those obtained with the traditional approach, but also that perform better in worst-case scenarios. We also show how the techniques developed for this problem can be used to address the VRPSD with duration constraints.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Planning Robust Freight Transportation Operations","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Planning Robust Freight Transportation Operations"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-13T10:00:00-05:00","event_time_end":"2006-11-12T23:00:00-05:00","event_time_end_last":"2006-11-12T23:00:00-05:00","gmt_time_start":"2006-11-13 15:00:00","gmt_time_end":"2006-11-13 04:00:00","gmt_time_end_last":"2006-11-13 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61549":{"#nid":"61549","#data":{"type":"event","title":"QCF SEMINAR :: Analytics of Optimal Execution","body":[{"value":"\u003Cp\u003EIn my talk, I will discuss the formulation of optimal execution as a mathematical optimization problem that represents a trade-off between return, transaction cost and execution risk in the presence of trader-specific constraints. I will present some results of our research on the modeling of transaction costs using execution and market data and compare the characteristics of optimal trading strategies that result from the application of the model to the trade scheduling problem. \n\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EBio\u003C\/strong\u003E\u003Cbr \/\u003E\nAmit Manwani leads the US Equity Quantitative Research and Analytics group at Lehman Brothers. In this capacity, Mr. Manwani manages a team of quantitative researchers that develop mathematical models, analytical tools and trading algorithms for internal trading desks and clients, as well as provide analytical consulting services to help clients optimize their investment and trading processes. \n\u003C\/p\u003E\n\u003Cp\u003EMr. Manwani has a B.Tech in Electrical Engineering from the Indian Institute of Technology, Mumbai and a PhD in Computation and Neural Systems from the California Institute of Technology, where he specialized in the mathematical modeling and analysis of complex systems. \n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"QCF SEMINAR :: Analytics of Optimal Execution","format":"limited_html"}],"field_summary_sentence":[{"value":"QCF SEMINAR :: Analytics of Optimal Execution"}],"uid":"27279","created_gmt":"2010-10-08 11:32:29","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-14T10:00:00-05:00","event_time_end":"2006-11-13T23:00:00-05:00","event_time_end_last":"2006-11-13T23:00:00-05:00","gmt_time_start":"2006-11-14 15:00:00","gmt_time_end":"2006-11-14 04:00:00","gmt_time_end_last":"2006-11-14 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61545":{"#nid":"61545","#data":{"type":"event","title":"THESIS DEFENSE :: Air Cargo Capacity and Revenue Management","body":[{"value":"\u003Cp\u003EIn this thesis, we address air cargo capacity and revenue management. The traditional air cargo supply chain is composed by the shippers, the freight forwarders and the airlines. The freight forwarders have to secure capacity with airlines in order to accommodate the shippers\u0027 demand. They have to bid for capacity six to twelve month before the actual departure date of the aircraft, and confirm the capacity they need a few days before departure. On the other end, the airlines sell the capacity left after honoring committed contracts and allotments (capacity committed to freight forwarders months in advance) during a booking period of fifteen to thirty days before the aircraft\u0027s departure. Currently, there is no penalty for the freight forwarders to commit to more capacity than they actually need, and the airlines are faced with release of capacity on the day of departure, capacity that could have been sold during the booking period and that translates into lost revenue.\n\u003C\/p\u003E\n\u003Cp\u003EWe address the freight forwarders problem of confirming needed capacity based on balancing the costs of ordering too much capacity versus ordering too little. We define the problem as a perishable inventory problem with backlocking options and lead times. We show the value function is convex in the state variables when the lead time is one or two periods. We present the structure of the optimal policy and show it is a stationary policy, i.e., it depends on the state variables only, and not on the period of time the order is placed. We find the limiting equations. In addition we present some simple solutions to the extended case when we have subcontracting options and the orders have a due date.\n\u003C\/p\u003E\n\u003Cp\u003EWe also address the airlines\u0027 revenue management problem, in particular the problems of (1) accepting\/rejecting incoming bookings based on bid prices (threshold values used in the process of accepting\/rejecting demand), and of  (2) estimating the show-up rate (ratio of bookings handed in at departure out of the bookings on hand) with impact on overbooking. We identify the need of splitting the cargo into two categories: small cargo, which is mail and small packages, and large cargo, which is the bulk of commercial cargo, based on their different arrival behaviors. The small cargo is approximated with the passengers arrival, and we propose a new algorithm to solve the traditional probabilistic nonlinear problem from the passengers side. The large cargo is solved using a dynamic program, which is decomposed at the leg level using a fare-prorating scheme. The solution from our new approach is shown via simulation to be superior to the two approaches used in practice: the first come first served, and the deterministic linear program.\u003Cbr \/\u003E\nThe show-up rate is estimated using wavelets and we show that a discrete show-up rate is more suitable than the traditional Normal estimator used in practice. The new estimator results in considerable more potential revenue. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Air Cargo Capacity and Revenue Management","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Air Cargo Capacity and Revenue Management"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-14T11:00:00-05:00","event_time_end":"2006-11-13T23:00:00-05:00","event_time_end_last":"2006-11-13T23:00:00-05:00","gmt_time_start":"2006-11-14 16:00:00","gmt_time_end":"2006-11-14 04:00:00","gmt_time_end_last":"2006-11-14 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61542":{"#nid":"61542","#data":{"type":"event","title":"THESIS DEFENSE ::  Small Parts High Volume Order Picking Systems","body":[{"value":"\u003Cp\u003EThis research investigates analytical models that might serve to support decisions in the early stages of designing high volume small parts order picking systems.  Because the development of analytical closed-forms is challenging, a common approach is to use simulation models for detailed design performance assessment.  However, simulation is not suitable for early stage design purposes; because simulation models are time-consuming (thus expensive) to construct and execute, especially when the number of alternatives to evaluate is large.  If available, analytical models are computationally cheaper.  They provide faster and more flexible solutions and though usually less detailed, may be adequate to support early stages of design.  The challenge is to develop generic analytic models providing useful results for a class of problems.\n\u003C\/p\u003E\n\u003Cp\u003EThis research focuses on a class of problems in high volume small parts order picking systems in which customer orders are progressively consolidated (or assembled) from pick buffers into order containers passing from one picking zone to another via conveyor, so that no sortation equipment is required downstream prior to packing and shipping and picking can precede order assembly.  This is a new technology, and not yet in widespread use.  The novelty in the modeling approach is the distinct separation of item-picking and order assembly operations which permits the development of performance models for both throughput and service level.\n\u003C\/p\u003E\n\u003Cp\u003EEssentially the system is modeled as a tandem queue, and the two detailed models for the picking and assembly subsystems are developed based on detailed description of the operations.  Solving the model provides estimates for performance measures, such as order cycle time and system throughput, which are essential in design.  The approximation method requires estimating the squared coefficient of interdeparture times from the classical GX\/G\/1 queuing model, and a suitable approximation is derived in this thesis.  Computational tests show the model to provide reasonably accurate estimates of system performance, with minimal computational overhead. \n\u003C\/p\u003E\n\u003Cp\u003ETo support the proposed queuing model, new models are developed for estimating mean and squared coefficient of variation for pick and assembly operation times.  These models include the variability of order contents and the picking process, along with the physical layout.  Results of the estimation compare very well with that of simulation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE ::  Small Parts High Volume Order Picking Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE ::  Small Parts High Volume Order Picking Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-15T12:00:00-05:00","event_time_end":"2006-11-14T23:00:00-05:00","event_time_end_last":"2006-11-14T23:00:00-05:00","gmt_time_start":"2006-11-15 17:00:00","gmt_time_end":"2006-11-15 04:00:00","gmt_time_end_last":"2006-11-15 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61541":{"#nid":"61541","#data":{"type":"event","title":"THESIS DEFENSE :: Optimization Approaches to Protein Folding","body":[{"value":"\u003Cp\u003EThis research shows optimization approaches to protein folding. The protein folding problem is to predict the compact three dimensional structure of a protein based on its amino acid sequence. My research focuses on ab-initio mathematical models to find provably optimal solutions to the 2D HP-lattice protein folding model. We built two integer programming (IP) models and five constraint programming (CP) models. All the models give provably optimal solutions. We also developed some CP techniques to solve the problem faster and then compared their computational times. We tested the models with several protein instances. My models, while they are probably too slow to use in practice, are significantly faster than the alternatives, and thus are mathematically relevant. We also provided reasons why protein folding is hard using complexity analysis. \n\u003C\/p\u003E\n\u003Cp\u003EFor further improvement, we will apply more advanced CP techniques such as variable ordering. We also believe that it will be a good approach to decompose the problem and solve each subproblem using either CP or IP. \n\u003C\/p\u003E\n\u003Cp\u003EOur research will contribute to showing whether CP can be an alternative to or a complement of IP in the future. Moreover, figuring out techniques combining CP and IP is a prominent research issue and our work will contribute to that literature. It also shows which IP\/CP strategies can speed up the running time for this type of problem. Finally, it shows why a mathematical approach to protein folding is especially hard not only mathematically, i.e. NP-hard, but also practically. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Optimization Approaches to Protein Folding","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Optimization Approaches to Protein Folding"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-16T15:30:00-05:00","event_time_end":"2006-11-15T23:00:00-05:00","event_time_end_last":"2006-11-15T23:00:00-05:00","gmt_time_start":"2006-11-16 20:30:00","gmt_time_end":"2006-11-16 04:00:00","gmt_time_end_last":"2006-11-16 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61539":{"#nid":"61539","#data":{"type":"event","title":"STATISTICS SEMINAR :: Estimation of Poisson Intensity in the Presence of Deadtime","body":[{"value":"\u003Cp\u003EOccurrence of dead time in recording instruments poses challenging problems in data acquisition and statistical analysis. Well known examples are signals recorded by the Geiger counter and the electron multiplier. In this presentation, we consider statistical analysis of recordings from the Phase Doppler Interferometry (PDI). PDI is a non-intrusive technique for obtaining information about spray characteristics in many areas of science, including liquid fuel spray in combustion, spray coatings, fire suppression and pesticide dispensing. PDI can record the velocity of individual droplets in a spray. But it will miss some of the droplets because of a recurring presence of dead time. The incompleteness of the PDI recordings results in a multimodal interarrival time distribution of droplets. Modeling a spray process as a homogeneous Poisson process, we estimate the spray diffusion rate (Poisson intensity) with a correction for dead time under various conditions. The asymptotic distribution of the estimates is derived from a strict stationary process. Simulation produced a good agreement between our estimates (in the presence of dead time) and the MLE obtained without dead time. Experimental data from NIST are used for illustration.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Estimation of Poisson Intensity in the Presence of Deadtime","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Estimation of Poisson Intensity in the Presence of Deadtime"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-17T11:00:00-05:00","event_time_end":"2006-11-16T23:00:00-05:00","event_time_end_last":"2006-11-16T23:00:00-05:00","gmt_time_start":"2006-11-17 16:00:00","gmt_time_end":"2006-11-17 04:00:00","gmt_time_end_last":"2006-11-17 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61540":{"#nid":"61540","#data":{"type":"event","title":"SCL SEMINAR :: Bidding Algorithms for Simultaneous Transportation Procurement Auctions","body":[{"value":"\u003Cp\u003EWe explore bidding strategies for a carrier in multiple simultaneous single-lane auctions. The challenge is that the operating cost of the carrier depends on the synergy between the set of lanes the carrier wins, which is not known until the end of the auction. The emphasis is on modeling the uncertainty involved by incorporating the bidding behavior of competitors. We model an optimization problem with the objective of maximizing the carrier\u0027s expected profit. \n\u003C\/p\u003E\n\u003Cp\u003EPizza and refreshments sponsored by The Supply Chain \u0026amp; Logistics Institute. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR :: Bidding Algorithms for Simultaneous Transportation Procurement Auctions","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR :: Bidding Algorithms for Simultaneous Transportation Procurement Auctions"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-17T11:00:00-05:00","event_time_end":"2006-11-16T23:00:00-05:00","event_time_end_last":"2006-11-16T23:00:00-05:00","gmt_time_start":"2006-11-17 16:00:00","gmt_time_end":"2006-11-17 04:00:00","gmt_time_end_last":"2006-11-17 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61538":{"#nid":"61538","#data":{"type":"event","title":"STOCHASTICS SEMINAR :: Asymptotic results for the stationary distribution of a production system: a work in progress","body":[{"value":"\u003Cp\u003EConsider a production system where two types of jobs, $a$ and $b$ arrive at a central buffer according to independent Poisson processes with rates $lambda_a$ and $lambda_b$, respectively. Machines $m_1$ and $m_2$ select jobs from the central buffer when they are idle. When machine $m_1$ becomes idle, it takes the job from the head of the line, regardless of type, and serves it at rate $mu_1$. When machine $m_2$ becomes idle, it takes the earliest arrival among the type $a$ jobs and serves it at rate $mu_2$. Thus, the queue discipline is FCFS subject to the restriction that machine $m_2$ only processes type $a$ jobs. We derive rough and exact asymptotic results for the steady state behavior of this production system. For some parameter values, the fluid limit of the most likely approach to the rare event is nonlinear.\n\u003C\/p\u003E\n\u003Cp\u003EJoint work with Ivo Adan and David McDonald\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STOCHASTICS SEMINAR :: Asymptotic results for the stationary distribution of a production system: a work in progress","format":"limited_html"}],"field_summary_sentence":[{"value":"STOCHASTICS SEMINAR :: Asymptotic results for the stationary distribution of a production system: a work in progress"}],"uid":"27279","created_gmt":"2010-10-08 11:32:28","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-21T10:00:00-05:00","event_time_end":"2006-11-20T23:00:00-05:00","event_time_end_last":"2006-11-20T23:00:00-05:00","gmt_time_start":"2006-11-21 15:00:00","gmt_time_end":"2006-11-21 04:00:00","gmt_time_end_last":"2006-11-21 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61536":{"#nid":"61536","#data":{"type":"event","title":"SCL SEMINAR :: When to Separate Carton-picking from Piece-picking in a Distribution Center","body":[{"value":"\u003Cp\u003EMany high-volume distribution centers, especially those that support retail stores, pick pieces from flow racks. Should carton quantities be picked from there as well? Or should cartons be picked from bulk storage? The former results in restocking more frequently; and the latter, higher pick costs. We build a mathematical model that tells us where each unit (cartons, pieces) of each SKU should be picked so that total labor costs (picking plus restocking) are minimized. The decision procedure is efficient and proven to err from optimal by an insignificant amount. \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR :: When to Separate Carton-picking from Piece-picking in a Distribution Center","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR :: When to Separate Carton-picking from Piece-picking in a Distribution Center"}],"uid":"27279","created_gmt":"2010-10-08 11:32:27","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-01T11:00:00-05:00","event_time_end":"2006-11-30T23:00:00-05:00","event_time_end_last":"2006-11-30T23:00:00-05:00","gmt_time_start":"2006-12-01 16:00:00","gmt_time_end":"2006-12-01 04:00:00","gmt_time_end_last":"2006-12-01 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61537":{"#nid":"61537","#data":{"type":"event","title":"STATISTICS SEMINAR :: Self Consistency: A General Recipe for Wavelet Estimation With Irregularly-Spaced and\/or Incomplete Data","body":[{"value":"\u003Cp\u003EWe propose a general methodology for conducting wavelet estimation with irregularly-spaced data by viewing them as the observed portion of an augmented regularly-spaced data set. We then invoke the self-consistency principle to define our wavelet estimators in the presence of incomplete data. Major advantages of this approach include: (i) it can be coupled with almost any wavelet shrinkage methods, (ii) it can deal with non--Gaussian or correlated noise, and (iii) it can automatically handle other kinds of missing or incomplete observations. We also develop a multiple-imputation algorithm and fast EM-type algorithms for computing or approximating such estimates. Results from numerical experiments suggest that our algorithms produce favorite results when comparing to several common methods, and therefore we hope these empirical findings would motivate subsequent theoretical investigations. To illustrate the flexibility of our approach, examples with Poisson data smoothing and image denoising are also provided. (This is joint work with Thomas Lee of Colorado State University.)\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Self Consistency: A General Recipe for Wavelet Estimation With Irregularly-Spaced and\/or Incomplete Data","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Self Consistency: A General Recipe for Wavelet Estimation With Irregularly-Spaced and\/or Incomplete Data"}],"uid":"27279","created_gmt":"2010-10-08 11:32:27","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-01T11:00:00-05:00","event_time_end":"2006-11-30T23:00:00-05:00","event_time_end_last":"2006-11-30T23:00:00-05:00","gmt_time_start":"2006-12-01 16:00:00","gmt_time_end":"2006-12-01 04:00:00","gmt_time_end_last":"2006-12-01 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61535":{"#nid":"61535","#data":{"type":"event","title":"STOCHASTICS SEMINAR :: Inventory Control in a Build-to-Order Environment","body":[{"value":"\u003Cp\u003EToday, most manufacturers are forced to offer a greater variety to meet customer expectations and maintain a competitive edge. The number of models and options offering by auto manufacturers for example has increased tremendously: BMW offers 10 to the 17th power variations of its 7-series alone. Build-to-Order offers a way to convert the problem of managing the essentially infinite number of end products to one of managing demand for the few thousand components that go into making a vehicle. While auto manufacturers produce the same number of vehicles each day, day-to-day usage of parts can vary significantly since each plant typically makes different models -often on the same line- and demand for option parts varies with customer preferences. At the same time growing reliance on suppliers in lower cost countries like Mexico and China has compounded the complexity of supply. We look at the challenges and solution strategies of employing build-to-order (BTO) in the context of global supply. We introduce a new shipping policy, \u0022Ship-to-Average\u0022, which prescribes sending a fixed quantity, based on the long term average forecast, with each shipment and making adjustments only if the inventory strays outside a prescribed range. We provide theoretical support for the observed performance of this type of policy by addressing a Brownian control problem whose objective is to find the right balance between holding costs and the operational costs involved in adjusting the shipment sizes. We consider an inventory whose content fluctuates as a Brownian motion in the absence of control. A linear holding cost is incurred continuously. At any moment a controller can adjust the inventory level by any positive or negative quantity at a fixed plus proportional cost. We show that the optimal policy in this theoretical abstraction of the original supply problem is of a simple form called control band policies. In fact, Ship-to-Average policies are a practical implementation of Control Band policies in the industrial setting which includes delivery delays. To reflect the realities of the problem, as an extension to the Brownian model we introduce constraints on available inventory space and expediting\/curtailing quantities. Employing techniques based on methods of Lagrangian relaxation, we show that control band policy is optimal even with constraints on the size of adjustments and on the maximum inventory level.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STOCHASTICS SEMINAR :: Inventory Control in a Build-to-Order Environment","format":"limited_html"}],"field_summary_sentence":[{"value":"STOCHASTICS SEMINAR :: Inventory Control in a Build-to-Order Environment"}],"uid":"27279","created_gmt":"2010-10-08 11:32:27","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-05T10:00:00-05:00","event_time_end":"2006-12-04T23:00:00-05:00","event_time_end_last":"2006-12-04T23:00:00-05:00","gmt_time_start":"2006-12-05 15:00:00","gmt_time_end":"2006-12-05 04:00:00","gmt_time_end_last":"2006-12-05 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61550":{"#nid":"61550","#data":{"type":"event","title":"Optimization in Resource Management: Complexity, Lyapunov Theorem, and Approximation","body":[{"value":"\u003Cp\u003EWe consider a class of nonconvex optimization problems arising from resource(e.g., spectrum)management in multiuser communication. For the\u003Cbr \/\u003E\ndiscretized version of this problem, we characterize its computational complexity\u003Cbr \/\u003E\nunder various practical settings and study the structure of its global optimal solutions. It is shown that this discretized nonconvex optimization problem is NP-hard in general and has a positive duality gap. Surprisingly\u003Cbr \/\u003E\nthis duality gap disappears asymptotically as the size of discretization step decreases to zero, thanks to a hidden convexity that can be uncovered by the\u003Cbr \/\u003E\nLyapunov Theorem in functional analysis. Based on this asymptotic zero duality result and a Lagrangian dual relaxation, we present, for any positive\u003Cbr \/\u003E\nepsilon, a polynomial time approximation scheme to compute an epsilon-optimal solution\u003Cbr \/\u003E\nfor the continuous version of the resource management problem.\n\u003C\/p\u003E\n\u003Cp\u003EBio sketch of the speaker: Shuzhong Zhang obtained his Bsc degree from Department of Mathematics, Fudan University, in 1984, and his Ph.D. degree\u003Cbr \/\u003E\nin 1991 from Tinbergen Institute, Erasmus University, The Netherlands. He is currently a full professor at Department of Systems Engineering \u0026amp; Engineering\u003Cbr \/\u003E\nManagement, The Chinese University of Hong Kong. Prior to this\u003Cbr \/\u003E\nposition, he served as a faculty member at Department of Econometrics, University\u003Cbr \/\u003E\nof Groningen (1991 1993), and at Econometric Institute, Erasmus\u003Cbr \/\u003E\nUniversity Rotterdam (1993 1999). He received the Vice-Chancellor\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Optimization in Resource Management: Complexity, Lyapunov Theorem, and Approximation","format":"limited_html"}],"field_summary_sentence":[{"value":"Optimization in Resource Management: Complexity, Lyapunov Theorem, and Approximation"}],"uid":"27279","created_gmt":"2010-10-08 11:32:29","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-05T10:00:00-05:00","event_time_end":"2006-12-04T23:00:00-05:00","event_time_end_last":"2006-12-04T23:00:00-05:00","gmt_time_start":"2006-12-05 15:00:00","gmt_time_end":"2006-12-05 04:00:00","gmt_time_end_last":"2006-12-05 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61534":{"#nid":"61534","#data":{"type":"event","title":"SCL SEMINAR :: The Delivery Time Slot Management Problem for e-Grocery","body":[{"value":"\u003Cp\u003E(co-authors Ann Campbell, Moritz Fleischmann, Martin Savelsbergh)\n\u003C\/p\u003E\n\u003Cp\u003EBridging the last mile to the customer is critical for the success of B2C e-commerce. For e-grocery, it is customary for the company and the customer to mutually agree on a narrow delivery window. The customer can choose from a menu of time windows and corresponding delivery fees. Determinants of the home delivery service from a customers\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR :: The Delivery Time Slot Management Problem for e-Grocery","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR :: The Delivery Time Slot Management Problem for e-Grocery"}],"uid":"27279","created_gmt":"2010-10-08 11:32:27","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-08T11:00:00-05:00","event_time_end":"2006-12-07T23:00:00-05:00","event_time_end_last":"2006-12-07T23:00:00-05:00","gmt_time_start":"2006-12-08 16:00:00","gmt_time_end":"2006-12-08 04:00:00","gmt_time_end_last":"2006-12-08 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61532":{"#nid":"61532","#data":{"type":"event","title":"THESIS DEFENSE :: Procurement in Truckload Transportation","body":[{"value":"\u003Cp\u003EIn this thesis, we address a number of operational challenges encountered in two emerging types of practices in the procurement of truckload transportation services: collaboration and auctions. The main objective in these two types of procurement strategies is identifying and exploiting synergies between the lanes of a carrier\u0027s network. In shipper collaboration, we take the perspective of a shipper who collaborates with other shippers to seek synergy between his lanes and other participants\u0027 lanes. On the other hand, in procurement auctions, although we take the carriers\u0027 perspective in our work, a shipper tries to discover the carrier (or carriers) whose network has the most synergy with his lanes. \n\u003C\/p\u003E\n\u003Cp\u003EThe first part of the thesis concerns the solution of optimization problems arising in collaborative transportation procurement networks where a group of shippers come together and jointly negotiate with carriers for the procurement of transportation services. In the highly fragmented truckload transportation industry a substantial fraction of truck movements involves empty trucks, i.e., involves moves that reposition trucks. However, reducing the amount of truck repositioning is difficult because the need for a carrier to reposition its trucks depends on the interactions between the shippers the carrier is serving. Through collaboration, shippers may be able to identify and submit sequences of continuous loaded movements to carriers, reducing the carriers\u0027 need for repositioning, and thus lowering the carriers\u0027 costs. A portion of the carriers\u0027 cost savings may be returned to the shippers in the form of lower prices. We discuss optimization technology that can be used to assist in the identification of repeatable, dedicated truckload continuous move tours with little truck repositioning. Timing considerations are critical to practical viability and are a key focus of our efforts. We demonstrate the effectiveness of the algorithms developed on various randomly generated instances as well as on instances derived from data obtained from a strategic sourcing consortium for a $14 billion dollar sized US industry. \n\u003C\/p\u003E\n\u003Cp\u003EThe second part of the thesis concerns the pricing of transportation services offered by the trucking companies (carriers). We look at the bid determination problem faced by carriers in transportation procurement auctions where a shipper requests quotes from the carriers and purchases the services of the lowest bidder. Determining the optimal bid values for a carrier poses several challenging research questions. The specific problem being studied is the bid valuation problem in the case where the carrier must place bids on multiple lanes simultaneously. For each lane, the carrier\u0027s bid must be high enough to make it profitable for the carrier but low enough to give the carrier a good chance of winning that lane. The difficulty is that the operating cost of the carrier depends on the set of lanes the carrier wins which is not known until the end of the auction. We model the problem as a stochastic optimization problem and propose a coordinate search algorithm for solving this problem. Then, we conduct a simulation study to demonstrate the positive impact of the approach on carrier profits. \n\u003C\/p\u003E\n\u003Cp\u003EIn both problems considered in the thesis, the central issue is identifying and exploiting synergies between the lanes of a carrier\u0027s network.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Procurement in Truckload Transportation","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Procurement in Truckload Transportation"}],"uid":"27279","created_gmt":"2010-10-08 11:32:27","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-13T12:30:00-05:00","event_time_end":"2006-12-12T23:00:00-05:00","event_time_end_last":"2006-12-12T23:00:00-05:00","gmt_time_start":"2006-12-13 17:30:00","gmt_time_end":"2006-12-13 04:00:00","gmt_time_end_last":"2006-12-13 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61533":{"#nid":"61533","#data":{"type":"event","title":"THESIS DEFENSE :: Driver Management for Less-than-Truckload Carriers","body":[{"value":"\u003Cp\u003EThe trucking industry is vitally important to the economy. It provides an essential service by transporting goods from business to business and from business to consumer. The less-than-truckload (LTL) industry is an important segment, serving businesses that ship quantities ranging from 150 lbs to 10,000 lbs. Large LTL carriers use thousands of drivers daily to move loads between terminals in the linehaul network, and each driver may be used for multiple consecutive load dispatches between rest periods.\n\u003C\/p\u003E\n\u003Cp\u003EDriver wages are a major component of transportation costs. Consequently, cost-effective driver management is of crucial importance for the profitability of LTL carriers. This thesis investigates a variety of issues related to driver management and has a strong focus on practice. Much of the research concentrates on developing methodologies and implementations that can be converted to commercial strength decision support tools, and on conducting studies that generate and provide useful practical insights.\n\u003C\/p\u003E\n\u003Cp\u003EIn this thesis, we describe a scheme for the dynamic scheduling of linehaul drivers developed for one of the largest LTL carriers in the United States. Dynamic driver scheduling is challenging because driver schedules must satisfy a complex set of rules, most of which are specified by government requirements and union regulations. In addition, trucking moves, unlike commercial airline flights or train dispatches, are not pre-scheduled; typically, a truck is dispatched when a sufficient amount of freight has accumulated at a terminal and truck capacity can be utilized effectively. The technology developed in this dissertation combines greedy search with enumeration of time-feasible driver duties, and is capable of generating cost-effective driver schedules covering 15,000-20,000 loads in a matter of minutes.\n\u003C\/p\u003E\n\u003Cp\u003EThis thesis describes a tactical tool for determining the allocation of drivers in a trucking terminal network. One of the key tactical questions faced by an LTL carrier is how many drivers to locate (or domicile) at each terminal. Determining an effective driver allocation can be especially difficult due to union rules. Most carriers are unionized and a portion of their drivers, called bid drivers, can only move loads between their domicile (home location) and a designated region. The driver allocation technology developed determines the number of drivers to allocate to each terminal as well as the designated region for each bid driver. Computational experiments using truck movement data representative of operations at a major U.S. LTL carrier demonstrate the effectiveness of our domiciling methodology, and show that union restrictions may result in substantially larger driver fleets, in some cases even up to 50% larger.\n\u003C\/p\u003E\n\u003Cp\u003EFinally, we investigate questions related to the number of drivers required to fulfill a given set of loaded truck moves in a more academic setting in order to obtain some fundamental insights. To facilitate the analysis, some simplifying assumptions are introduced: the terminal network consists of only two terminals and the exact dispatch times of the loaded moves are known. The goal is to determine the minimum number of drivers required to cover all the loaded moves, and the resultant dispatch schedule for these drivers. The problem is analyzed with a number of different restrictions imposed on driver schedules. Without any restrictions on schedules, the problem is shown to be polynomially solvable. For more restricted variants, several easily computable lower bounds on the minimum number of drivers are derived, integer programming formulations are presented, and fast heuristics are designed and analyzed. A computational study provides insights into the quality of the lower bounds, the quality of the heuristics, and the computational requirements of the integer programming formulations.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Driver Management for Less-than-Truckload Carriers","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Driver Management for Less-than-Truckload Carriers"}],"uid":"27279","created_gmt":"2010-10-08 11:32:27","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-12-14T12:00:00-05:00","event_time_end":"2006-12-13T23:00:00-05:00","event_time_end_last":"2006-12-13T23:00:00-05:00","gmt_time_start":"2006-12-14 17:00:00","gmt_time_end":"2006-12-14 04:00:00","gmt_time_end_last":"2006-12-14 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61552":{"#nid":"61552","#data":{"type":"event","title":"STOCHASTICS SEMINAR :: Assignment Policies for Flexible Servers in Non-Markovian Lines with Finite Buffers","body":[{"value":"\u003Cp\u003EWe study the assignment of flexible servers to stations in tandem lines with finite intermediate buffers and service times that are not necessarily exponentially distributed. More specifically, for systems with two stations and two servers, we show that the optimal server assignment policy is the same as the optimal policy for the corresponding Markovian system if the service times are deterministic and the buffer size is arbitrary or if the service times have an arbitrary distribution and the buffer size is zero. We also provide numerical results supporting the conjecture that the optimal server assignment policy of Markovian systems is also optimal for non-Markovian systems. For systems with two stations, three servers and buffer of size zero between the two stations, we specify the optimal policy when the service times are deterministic and we show that the structure of the optimal policy is of threshold type (as the one for the corresponding Markovian system) when the service times have an arbitrary distribution. Finally, we propose several heuristic server assignment policies and show that they yield near-optimal performance for different service time distributions.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STOCHASTICS SEMINAR :: Assignment Policies for Flexible Servers in Non-Markovian Lines with Finite Buffers","format":"limited_html"}],"field_summary_sentence":[{"value":"STOCHASTICS SEMINAR :: Assignment Policies for Flexible Servers in Non-Markovian Lines with Finite Buffers"}],"uid":"27279","created_gmt":"2010-10-08 11:33:25","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-31T10:00:00-05:00","event_time_end":"2006-10-30T23:00:00-05:00","event_time_end_last":"2006-10-30T23:00:00-05:00","gmt_time_start":"2006-10-31 15:00:00","gmt_time_end":"2006-10-31 04:00:00","gmt_time_end_last":"2006-10-31 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61553":{"#nid":"61553","#data":{"type":"event","title":"STATISTICS SEMINAR :: Nonlinear Dimension Reduction and Applications","body":[{"value":"\u003Cp\u003EI will present an informal discussion of several recent algorithms for nonlinear dimension reduction, both supervised and unsupervised, including Isomap, local linear embedding, Hessian-LLE, local tangent space alignment, semi-definite embedding, and contour regression. I\u0027ll try my best to highlight their differences and commonalities, and point out several topics that deserve further investigation. Connections to other areas such as semi-definite programming, mesh parameterization, surface reconstruction, and numerical solution of differential equations.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Nonlinear Dimension Reduction and Applications","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Nonlinear Dimension Reduction and Applications"}],"uid":"27279","created_gmt":"2010-10-08 11:33:25","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-10-31T10:00:00-05:00","event_time_end":"2006-10-30T23:00:00-05:00","event_time_end_last":"2006-10-30T23:00:00-05:00","gmt_time_start":"2006-10-31 15:00:00","gmt_time_end":"2006-10-31 04:00:00","gmt_time_end_last":"2006-10-31 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61547":{"#nid":"61547","#data":{"type":"event","title":"SCL SEMINAR :: Inventory Control in a Build-to-Order Environment","body":[{"value":"\u003Cp\u003EToday most manufacturers are forced to offer a greater variety to meet customer expectations and maintain a competitive edge. The number of models and options offering by auto manufacturers for example has increased tremendously: BMW offers 10 to the 17th power variations of its 7-series alone. Build-to-Order offers a way to convert the problem of managing the essentially infinite number of end products to one of managing demand for the few thousand components that go into making a vehicle. While auto manufacturers produce the same number of vehicles each day, day-to-day usage of parts can vary significantly since each plant typically makes different models -often on the same line- and demand for option parts varies with customer preferences. At the same time growing reliance on suppliers in lower cost countries like Mexico and China has compounded the complexity of supply. We look at the challenges and solution strategies of employing build-to-order (BTO) in the context of global supply. We introduce a new shipping policy, \u0022Ship-to-Average\u0022, which prescribes sending a fixed quantity, based on the long term average forecast, with each shipment and making adjustments only if the inventory strays outside a prescribed range. We provide theoretical support for the observed performance of this type of policy by addressing a Brownian control problem whose objective is to find the right balance between holding costs and the operational costs involved in adjusting the shipment sizes. We consider an inventory whose content fluctuates as a Brownian motion in the absence of control. A linear holding cost is incurred continuously. At any moment a controller can adjust the inventory level by any positive or negative quantity at a fixed plus proportional cost. We show that the optimal policy in this theoretical abstraction of the original supply problem is of a simple form called control band policies. In fact, Ship-to-Average policies are a practical implementation of Control Band policies in the industrial setting which includes delivery delays. To reflect the realities of the problem, as an extension to the Brownian model we introduce constraints on available inventory space and expediting\/curtailing quantities. Employing techniques based on methods of Lagrangian relaxation, we show that control band policy is optimal even with constraints on the size of adjustments and on the maximum inventory level.\n\u003C\/p\u003E\n\u003Cp\u003EPizza and refreshments sponsored by The Logistics Institute.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SCL SEMINAR :: Inventory Control in a Build-to-Order Environment","format":"limited_html"}],"field_summary_sentence":[{"value":"SCL SEMINAR :: Inventory Control in a Build-to-Order Environment"}],"uid":"27279","created_gmt":"2010-10-08 11:32:29","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-03T11:00:00-05:00","event_time_end":"2006-11-02T23:00:00-05:00","event_time_end_last":"2006-11-02T23:00:00-05:00","gmt_time_start":"2006-11-03 16:00:00","gmt_time_end":"2006-11-03 04:00:00","gmt_time_end_last":"2006-11-03 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"61548":{"#nid":"61548","#data":{"type":"event","title":"THESIS DEFENSE :: Cutting Planes for Large Mixed Integer Programming Models","body":[{"value":"\u003Cp\u003EIn this thesis I focus on cutting planes for large Mixed Integer Programming (MIP) problems. More specifically, I focus on two independent cutting planes studies. The first of these deals with cutting planes for the Traveling Salesman Problem (TSP), and the second with cutting planes for general MIPs.\n\u003C\/p\u003E\n\u003Cp\u003EIn the first study I introduce a new class of cutting planes which I call the Generalized Domino Parity (GDP) inequalities. My main achievements with regard to these are: (1) I show that these are valid for the TSP and for the graphical TSP. (2) I show that they generalize most well-known TSP inequalities (including combs, domino-parity constraints, clique-trees, bipartitions, paths and stars). (3) I show that a sub-class of these (which contains all clique-tree inequalities w\/ a fixed number of handles) can be separated in polynomial time, on planar graphs.\n\u003C\/p\u003E\n\u003Cp\u003EMy second study can be subdivided in two parts. In the first of these I study the Mixed Integer Knapsack Problem (MIKP) and develop a branch-and-bound based algorithm for solving it. The novelty of the approach is that it exploits the notion of \u0022dominance\u0022 in order to effectively prune solutions in the branch-and-bound tree. In the second part, I develop a Mixed Integer Rounding (MIR) cut separation heuristic, and embed the MIKP solver in a column generation algorithm in order to assess the performance of said heuristic. The goal of this study is to understand why no other class of inequalities derived from single-row systems has been able to outperform the MIR. Computational results are presented.\n\u003C\/p\u003E\n\u003Cp\u003EPlease feel free to browse through my thesis draft, which can be found in pdf format at mgoycool.uai.cl\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Cutting Planes for Large Mixed Integer Programming Models","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Cutting Planes for Large Mixed Integer Programming Models"}],"uid":"27279","created_gmt":"2010-10-08 11:32:29","changed_gmt":"2016-10-08 01:52:31","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2006-11-09T11:00:00-05:00","event_time_end":"2006-11-08T23:00:00-05:00","event_time_end_last":"2006-11-08T23:00:00-05:00","gmt_time_start":"2006-11-09 16:00:00","gmt_time_end":"2006-11-09 04:00:00","gmt_time_end_last":"2006-11-09 04:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EBarbara Christopher\u003C\/strong\u003E\u003Cbr \/\u003EIndustrial and Systems Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=bt3\u0022\u003EContact Barbara Christopher\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404.385.3102\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}