{"61818":{"#nid":"61818","#data":{"type":"event","title":"Statistics Seminar::Exploitation and integration of detailed and quick FEA simulations: Improving engineering design via a Bayesian synthesis","body":[{"value":"\u003Cp\u003EThis talk is motivated by collaborative work on robust topology design of cellular material at Georgia Tech. In simulating the material properties finite elements analysis (FEA) can be done based on different physical-mechanistic models. Typically a more detailed or accurate model will require longer FEA runs while a simplified or rough model will require quicker FEA runs. They are referred to as detailed and quick simulations respectively. Detailed simulations can take up days of CPU time. While they can provide more accurate results, their number can be limited. On the other hand, many quick simulations can be obtained, though the results are less reliable. A new approach is taken here to combine these sources of data to come up with a meta-model that can be used to describe the relationship between the output of FEA runs (i.e., material properties) and input parameters (i.e., design parameters) and for prediction. Since the quick simulations form the bulk of the data, they are used to build a semi-parametric model based on Gaussian random functions. This fitted model is then\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar::Exploitation and integration of detailed and quick FEA simulations: Improving engineering design via a Bayesian synthesis","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar::Exploitation and integration of detailed and quick FEA simulations: Improving engineering design via a Bayesian synthesis"}],"uid":"27279","created_gmt":"2010-10-08 11:42:12","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-01-15T11:00:00-05:00","event_time_end":"2004-01-14T23:00:00-05:00","event_time_end_last":"2004-01-14T23:00:00-05:00","gmt_time_start":"2004-01-15 16:00:00","gmt_time_end":"2004-01-15 04:00:00","gmt_time_end_last":"2004-01-15 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":""}},"61820":{"#nid":"61820","#data":{"type":"event","title":"ISyE Faculty Meeting","body":[{"value":"\u003Cp\u003EDr. Chameau will be our guest speaker.\n\u003C\/p\u003E\n\u003Cp\u003EPlease mark this date and time on your calendars.\n\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 11:42:12","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-01-20T10:00:00-05:00","event_time_end":"2004-01-19T23:00:00-05:00","event_time_end_last":"2004-01-19T23:00:00-05:00","gmt_time_start":"2004-01-20 15:00:00","gmt_time_end":"2004-01-20 04:00:00","gmt_time_end_last":"2004-01-20 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":""}},"61817":{"#nid":"61817","#data":{"type":"event","title":"Statistics Seminar::On The Relationship Between Bayesian  And Frequency Theory Prediction","body":[{"value":"\u003Cp\u003EGiven a sufficient statistic, basic predictive inference based on frequency theory actually implies the existence of a prediction distribution function, conditional on the sufficient statistic. Unlike Bayesian posterior predictive functions, the derived distribution is not necessarily a valid one. If it is, the prediction distribution function is necessarily a Bayesian predictive function. In suchcases, the frequency theory prediction method implies a particular Bayesian prior on the nuisance parameter, thus these prediction methods represent a special case of Bayesian predictive inference.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar::On The Relationship Between Bayesian  And Frequency Theory Prediction","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar::On The Relationship Between Bayesian  And Frequency Theory Prediction"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-01-22T11:00:00-05:00","event_time_end":"2004-01-21T23:00:00-05:00","event_time_end_last":"2004-01-21T23:00:00-05:00","gmt_time_start":"2004-01-22 16:00:00","gmt_time_end":"2004-01-22 04:00:00","gmt_time_end_last":"2004-01-22 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":""}},"61816":{"#nid":"61816","#data":{"type":"event","title":"Statistics Seminar::SPC Procedure for Complicated Functional Data","body":[{"value":"\u003Cp\u003EFunctional data characterize quality or reliability performance of many\u003Cbr \/\u003E\nmanufacturing processes.  They are very informative in process monitoring\u003Cbr \/\u003E\nand controlling for nano-machining, ultra-thin semiconductor fabrication,\u003Cbr \/\u003E\nand antenna, steel-stamping or chemical manufacturing processes as seen in\u003Cbr \/\u003E\nmany literature. In this talk, we present wavelet-based statistical\u003Cbr \/\u003E\nprocess control (SPC) procedures and evaluates their performance using\u003Cbr \/\u003E\nsimulation studies. Unlike the recent SPC research on linear profile data\u003Cbr \/\u003E\nfor monitoring global changes of data patterns, our methods focus on local\u003Cbr \/\u003E\nchanges in data segments. In contrast to most of the SPC procedures\u003Cbr \/\u003E\ndeveloped for detecting a known type of process change, our idea of\u003Cbr \/\u003E\nupdating the selected parameters enables the handling all types of process\u003Cbr \/\u003E\nchanges whether known or unknown. (Joint work with Jye-Chyi Lu).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar::SPC Procedure for Complicated Functional Data","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar::SPC Procedure for Complicated Functional Data"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-01-29T11:00:00-05:00","event_time_end":"2004-01-28T23:00:00-05:00","event_time_end_last":"2004-01-28T23:00:00-05:00","gmt_time_start":"2004-01-29 16:00:00","gmt_time_end":"2004-01-29 04:00:00","gmt_time_end_last":"2004-01-29 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":""}},"61811":{"#nid":"61811","#data":{"type":"event","title":"Statistics seminar:: A Review and Analysis of the Mahalanobis-Taguchi System","body":[{"value":"\u003Cp\u003EThe Mahalanobos-Taguchi system (MTS) is a relatively new collection of\u003Cbr \/\u003E\nmethods proposed for diagnosis, forecasting, and classification\u003Cbr \/\u003E\nusing multivariate data.\u003Cbr \/\u003E\nThe primary proponent of the MTS is Genichi Taguchi, who is very well\u003Cbr \/\u003E\nknown for his controversial ideas and methods for using design of experiments.\u003Cbr \/\u003E\nThe MTS was claimed to be a groundbreaking new philosophy for multivariate\u003Cbr \/\u003E\ndata analysis and diagnosis and has been popularized in major companies,\u003Cbr \/\u003E\nsuch as Ford, GE, Nissan, Sharp, Xerox, etc.\u003Cbr \/\u003E\nIn this talk, we review the methods of the MTS and use a case study based on\u003Cbr \/\u003E\nmedical data to illustrate them.  We also compare common classification\u003Cbr \/\u003E\ntree methods with the MTS in the case study and illustrate the\u003Cbr \/\u003E\ndifferences.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics seminar:: A Review and Analysis of the Mahalanobis-Taguchi System","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics seminar:: A Review and Analysis of the Mahalanobis-Taguchi System"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-05T11:00:00-05:00","event_time_end":"2004-02-04T23:00:00-05:00","event_time_end_last":"2004-02-04T23:00:00-05:00","gmt_time_start":"2004-02-05 16:00:00","gmt_time_end":"2004-02-05 04:00:00","gmt_time_end_last":"2004-02-05 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":""}},"61814":{"#nid":"61814","#data":{"type":"event","title":"Natural Systems Seminar: Technological and Natural Systems in the Anthropocene","body":[{"value":"\u003Cp\u003EBrad Allenby is a candidate for the Anderson\/Interface Chair in Natural Systems\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Natural Systems Seminar: Technological and Natural Systems in the Anthropocene","format":"limited_html"}],"field_summary_sentence":[{"value":"Natural Systems Seminar: Technological and Natural Systems in the Anthropocene"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-12T10:00:00-05:00","event_time_end":"2004-02-11T23:00:00-05:00","event_time_end_last":"2004-02-11T23:00:00-05:00","gmt_time_start":"2004-02-12 15:00:00","gmt_time_end":"2004-02-12 04:00:00","gmt_time_end_last":"2004-02-12 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":""}},"61810":{"#nid":"61810","#data":{"type":"event","title":"Faculty Candidate Seminar: Statistical Inference for Network Tomography","body":[{"value":"\u003Cp\u003EAbstract: We study network tomography questions, which are large scale inverse\u003Cbr \/\u003E\ninference problems and vital for many network traffic engineering tasks such as\u003Cbr \/\u003E\ndynamic routing optimization, Quality of Service (QoS) guarantee. We propose a\u003Cbr \/\u003E\npseudo likelihood approach for estimating parameters of these problems based on\u003Cbr \/\u003E\nthe principle of divide-and-conquer. The example of multicast link delay\u003Cbr \/\u003E\nestimation problem is used to motivate the concept. We then apply the pseudo\u003Cbr \/\u003E\nlikelihood approach to the problem of estimating origin-destination matrix\u003Cbr \/\u003E\nthrough link traffic counts, which is one of the core problems in network\u003Cbr \/\u003E\ntraffic engineering.\n\u003C\/p\u003E\n\u003Cp\u003EThis is joint work with Bin Yu.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Candidate Seminar: Statistical Inference for Network Tomography","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Candidate Seminar: Statistical Inference for Network Tomography"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-16T09:00:00-05:00","event_time_end":"2004-02-15T23:00:00-05:00","event_time_end_last":"2004-02-15T23:00:00-05:00","gmt_time_start":"2004-02-16 14:00:00","gmt_time_end":"2004-02-16 04:00:00","gmt_time_end_last":"2004-02-16 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":""}},"61813":{"#nid":"61813","#data":{"type":"event","title":"Natural Systems Seminar: Dynamic Allocation in Honey Bee and Internet Server Colonies","body":[{"value":"\u003Cp\u003ECraig Tovey is a candidate for the Anderson\/Interface Chair in Natural Systems\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Natural Systems Seminar: Dynamic Allocation in Honey Bee and Internet Server Colonies","format":"limited_html"}],"field_summary_sentence":[{"value":"Natural Systems Seminar: Dynamic Allocation in Honey Bee and Internet Server Colonies"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-17T10:00:00-05:00","event_time_end":"2004-02-16T23:00:00-05:00","event_time_end_last":"2004-02-16T23:00:00-05:00","gmt_time_start":"2004-02-17 15:00:00","gmt_time_end":"2004-02-17 04:00:00","gmt_time_end_last":"2004-02-17 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":""}},"61812":{"#nid":"61812","#data":{"type":"event","title":"Natural Systems Seminar","body":[{"value":"\u003Cp\u003EValerie Thomas is a candidate for the Anderson\/Interface Chair in Natural Systems\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Natural Systems Seminar","format":"limited_html"}],"field_summary_sentence":[{"value":"Natural Systems Seminar"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-19T10:00:00-05:00","event_time_end":"2004-02-18T23:00:00-05:00","event_time_end_last":"2004-02-18T23:00:00-05:00","gmt_time_start":"2004-02-19 15:00:00","gmt_time_end":"2004-02-19 04:00:00","gmt_time_end_last":"2004-02-19 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":""}},"61809":{"#nid":"61809","#data":{"type":"event","title":"Faculty Candidate Seminar: Efficient Empirical Bayes Variable Selection and Estimation","body":[{"value":"\u003Cp\u003EAbstract: We propose an empirical Bayes method for variable selection and\u003Cbr \/\u003E\ncoefficient estimation in linear regression models. The method is based on\u003Cbr \/\u003E\na particular hierarchical Bayes formulation, and the estimator is shown to\u003Cbr \/\u003E\nbe closely related to the LASSO estimator. Such a connection allows us to\u003Cbr \/\u003E\ntake advantage of the recently developed quick LASSO algorithm to compute\u003Cbr \/\u003E\nthe empirical Bayes estimate, and provides new ways to select the tuning\u003Cbr \/\u003E\nparameter in the LASSO method. Unlike previous empirical Bayes variable\u003Cbr \/\u003E\nselection methods, which in most practical situation can only be\u003Cbr \/\u003E\nimplemented through a greedy stepwise algorithm, our method gives a global\u003Cbr \/\u003E\nsolution efficiently. Simulations show that the proposed method compares\u003Cbr \/\u003E\nfavorably with other variable selection and estimation methods in terms of\u003Cbr \/\u003E\nvariable selection, estimation accuracy, and computation speed. This is\u003Cbr \/\u003E\njoint work with Professor Yi Lin.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Faculty Candidate Seminar: Efficient Empirical Bayes Variable Selection and Estimation","format":"limited_html"}],"field_summary_sentence":[{"value":"Faculty Candidate Seminar: Efficient Empirical Bayes Variable Selection and Estimation"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-20T09:00:00-05:00","event_time_end":"2004-02-19T23:00:00-05:00","event_time_end_last":"2004-02-19T23:00:00-05:00","gmt_time_start":"2004-02-20 14:00:00","gmt_time_end":"2004-02-20 04:00:00","gmt_time_end_last":"2004-02-20 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":""}},"61807":{"#nid":"61807","#data":{"type":"event","title":"ISyE Faculty Meeting","body":[{"value":"\u003Cp\u003EAnderson Chair Candidates. This meeting is for all who are interested in the subject matter.\n\u003C\/p\u003E\n\u003Cp\u003EIf you are not able to make this meeting, but have comments to share, please contact Ellis Johnson.\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 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-26T10:00:00-05:00","event_time_end":"2004-02-25T23:00:00-05:00","event_time_end_last":"2004-02-25T23:00:00-05:00","gmt_time_start":"2004-02-26 15:00:00","gmt_time_end":"2004-02-26 04:00:00","gmt_time_end_last":"2004-02-26 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":""}},"61815":{"#nid":"61815","#data":{"type":"event","title":"Statistics Seminar::Semiparametric Maximum Likelihood Estimation with Estimation Equations:  A New Approach for Censored Data in Survival Analyses","body":[{"value":"\u003Cp\u003ESemiparametric maximum likelihood estimation with estimating equations\u003Cbr \/\u003E\n(SMLE) is more flexible than the traditional methods such as the parametric maximum likelihood estimation, Cox\u0027s proportional hazards model, accelerated failure time model, quasi-likelihood, and generalized estimating equations with much less restrictions on distributions and regression-models. The needed information about distribution and regression structures is incorporated in estimating equations of the SMLE to improve the estimation quality of nonparametric methods. The likelihood of the SMLE in censored data cases involve several complicated implicit functions without closed-form expressions, and the first derivatives of the log-profile-likelihood cannot be expressed as summations of independent and identically distributed random variables. \n\u003C\/p\u003E\n\u003Cp\u003EFor group-censored data and continuos data, it is verified that all the implicit functions are well defined, and the asymptotic distributions of the SMLE for model parameters and lifetime distributions are obtained.  \n\u003C\/p\u003E\n\u003Cp\u003EA real life example with HIV data is presented to illustrate the application of SMLE method.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar::Semiparametric Maximum Likelihood Estimation with Estimation Equations:  A New Approach for Censored Data in Survival Analyses","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar::Semiparametric Maximum Likelihood Estimation with Estimation Equations:  A New Approach for Censored Data in Survival Analyses"}],"uid":"27279","created_gmt":"2010-10-08 11:42:11","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-02-26T11:00:00-05:00","event_time_end":"2004-02-25T23:00:00-05:00","event_time_end_last":"2004-02-25T23:00:00-05:00","gmt_time_start":"2004-02-26 16:00:00","gmt_time_end":"2004-02-26 04:00:00","gmt_time_end_last":"2004-02-26 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":""}},"61808":{"#nid":"61808","#data":{"type":"event","title":"Statistics seminar:: DATA MODELING, QUANTILE\/QUARTILE FUNCTIONS, CONFIDENCE INTERVALS, INTRODUCTORY STATISTICS REFORM","body":[{"value":"\u003Cp\u003EHistory of statistics is alive to me as I fondly recall my interaction with Eric Lehmann since receiving my Ph. D. in Berkeley in 1953. The 2003 Economics Nobel Prize (awarded for fundamental research in statistical time series analysis) reminds me of my joking complaint to diverse applied researchers: \u0022why do you call it theory if I know it and   applied research when you practice it?\u0022  I have continued to learn a lot about Quantiles and Nonparametric Data Modeling   since my 1979 JASA paper.   New methods have been  developed (that some applied researchers consider a gold mine). Quantile data modeling is not practiced by  most statisticians who  are limited to sample median Q2, interquartile range IQR, and Q-Q probability plots. To estimate and test a parameter mu  one starts with natural estimator mu^ ; we define  statistic T(mu,mu^) increasing function of mu and with distribution  (when  mu is true parameter)  equal to distribution of a random variable T (usually Normal(0,1), Student, or inverse average\u003Cbr \/\u003E\nchi-square). To test H_0:mu=mu_0 one computes or bounds P value(mu_0)=F_T(observed T(mu_0,mu^)); it is a distribution function of mu_0 (whose probability density one could derive).   Define its inverse m^(u) by Q_T(u)=T(mu^(u),mu^);  mu^(u), called the parameter with P-value u,  is  a quantile function which has a pseudo-Bayesian interpretation as the conditional quantile of mu given the data.  The conventional confidence level 1-a confidence interval  can\u003Cbr \/\u003E\nbe shown to be  mu^(a\/2)\ndefine (and plot on same graph  with exponential and normal) informative\u003Cbr \/\u003E\nquantile\/quartile function Q\/Q(u)=(Q(u)-midquartile)\/2 IQR. Talk could also  discuss  confidence Q-Q plots, conditional quantile, comparison distribution, mid-distribution, and definition of sample quantiles,  linear rank statistics, and sample variance.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics seminar:: DATA MODELING, QUANTILE\/QUARTILE FUNCTIONS, CONFIDENCE INTERVALS, INTRODUCTORY STATISTICS REFORM","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics seminar:: DATA MODELING, QUANTILE\/QUARTILE FUNCTIONS, CONFIDENCE INTERVALS, INTRODUCTORY STATISTICS REFORM"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-03-18T11:00:00-05:00","event_time_end":"2004-03-17T23:00:00-05:00","event_time_end_last":"2004-03-17T23:00:00-05:00","gmt_time_start":"2004-03-18 16:00:00","gmt_time_end":"2004-03-18 04:00:00","gmt_time_end_last":"2004-03-18 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":""}},"61805":{"#nid":"61805","#data":{"type":"event","title":"INFORMS Atlanta Chapter Meeting","body":[{"value":"\u003Cp\u003ERichard Nelson, Director of Advanced Planning for the Consumer Products Group at Georgia Pacific, will speak on \u0022Operations Research in the Supply Chain Arena\u0022. He will share techniques that have worked for his group, and offer insights into how to improve your chances for successful OR projects. Light refreshments will be served, and there will also be time to network with fellow OR professionals in the Atlanta community.\n\u003C\/p\u003E\n\u003Cp\u003EThe meeting is open to all interested parties, and is free of charge. Please pass this information along to any associates whom you think might be interested.\n\u003C\/p\u003E\n\u003Cp\u003EThe meeting will be in the Executive Classroom (Room 228) of the ISyE Main Entrance Bldg. (755 Ferst Drive, formerly the Dupree School of Management Building).\n\u003C\/p\u003E\n\u003Cp\u003EHere\u0027s a link to a map of the campus: \u003Ca href=\u0022http:\/\/www.isye.gatech.edu\/visitors\/maps\/\u0022 title=\u0022http:\/\/www.isye.gatech.edu\/visitors\/maps\/\u0022\u003Ehttp:\/\/www.isye.gatech.edu\/visitors\/maps\/\u003C\/a\u003E\n\u003C\/p\u003E\n\u003Cp\u003EThere should be plenty of free parking in the area after 5:00 PM.\n\u003C\/p\u003E\n\u003Cp\u003EKevin Geraghty (\u003Ca href=\u0022mailto:kevin@revenueresearch.com\u0022\u003Ekevin@revenueresearch.com\u003C\/a\u003E) is organizing an informal dinner after the meeting. Please contact him if you are interested in participating so he can make an appropriate reservation at a nearby restaurant.\n\u003C\/p\u003E\n\u003Cp\u003EWe look forward to seeing you there. Please contact me if you have questions or suggestions, or if you wish to be added to the mailing list for future meetings.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"INFORMS Atlanta Chapter Meeting","format":"limited_html"}],"field_summary_sentence":[{"value":"INFORMS Atlanta Chapter Meeting"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-03-18T16:30:00-05:00","event_time_end":"2004-03-17T23:00:00-05:00","event_time_end_last":"2004-03-17T23:00:00-05:00","gmt_time_start":"2004-03-18 21:30:00","gmt_time_end":"2004-03-18 04:00:00","gmt_time_end_last":"2004-03-18 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":""}},"61819":{"#nid":"61819","#data":{"type":"event","title":"The Sixth International ACM SIGCAPH Conference on Assistive Technologies","body":[{"value":"\u003Cp\u003EASSETS 2004 (October 18-20, 2004) focuses on computer-based system design and its application to the special needs of persons with disabilities. The conference\u0027s scope spans special needs associated with speech, motor, hearing, and vision impairments; cognitive limitations; emotional and learning disabilities; and aging. Researchers and developers, from both academia and industry, are invited to meet to exchange ideas and present reports on new hardware and\/or software advances related to these areas.\n\u003C\/p\u003E\n\u003Cp\u003EThe conference program covers a multitude of topics relevant to assistive technologies and universal accessibility and is structured around technical papers, poster sessions, demonstrations, panels, the doctoral consortium, and a host of social events. \n\u003C\/p\u003E\n\u003Cp\u003EASSETS 2004 will be held at the Georgia Tech Global Learning Center at Technology Square, a state-of-the-art meeting and accommodation facility that combines all the amenities and modern technologies of tomorrow with a prime midtown Atlanta location. The hotel and conference center is fully accessible to all participants.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"The Sixth International ACM SIGCAPH Conference on Assistive Technologies","format":"limited_html"}],"field_summary_sentence":[{"value":"The Sixth International ACM SIGCAPH Conference on Assistive Technologies"}],"uid":"27279","created_gmt":"2010-10-08 11:42:12","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-18T01:00:00-04:00","event_time_end":"2004-10-18T01:00:00-04:00","event_time_end_last":"2004-10-18T01:00:00-04:00","gmt_time_start":"2004-10-18 05:00:00","gmt_time_end":"2004-10-18 05:00:00","gmt_time_end_last":"2004-10-18 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":""}},"61804":{"#nid":"61804","#data":{"type":"event","title":"Blind Identification and Visualization of Manufacturing Variation Sources","body":[{"value":"\u003Cp\u003EIn modern manufacturing processes, large quantities of multivariate measurement data are routinely available through automated in-process sensing. The data generally contain a great deal of buried diagnostic information that can aid in identifying and eliminating major root causes of manufacturing variation. Traditional statistical process control (SPC) tools, which were designed for situations in which data are much less abundant, do not take full advantage of in-process measurement. In this talk I will discuss an approach that is much better suited for this scenario. The approach has origins in the sensor-array signal processing arena, where it is commonly referred to as blind source separation. The talk will cover basic blind source separation principals and the analogy between diagnosing multiple sources of manufacturing variation and separating multiple radar (for example) source signals from an antennae array. I will also discuss extending blind separation methods to be more effective and versatile in manufacturing. One advantage of the overall approach is that it lends itself well to graphical visualization methods for helping process operators and engineers understand the major root causes of manufacturing variation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Blind Identification and Visualization of Manufacturing Variation Sources","format":"limited_html"}],"field_summary_sentence":[{"value":"Blind Identification and Visualization of Manufacturing Variation Sources"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-05-11T12:00:00-04:00","event_time_end":"2004-05-11T01:00:00-04:00","event_time_end_last":"2004-05-11T01:00:00-04:00","gmt_time_start":"2004-05-11 16:00:00","gmt_time_end":"2004-05-11 05:00:00","gmt_time_end_last":"2004-05-11 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":""}},"61806":{"#nid":"61806","#data":{"type":"event","title":"An Overview of Cost Allocation in Newsvendor Inventory Centralization","body":[{"value":"\u003Cp\u003EConsider a set of n stores with single item and single period demands with an option of centralized ordering\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"An Overview of Cost Allocation in Newsvendor Inventory Centralization","format":"limited_html"}],"field_summary_sentence":[{"value":"An Overview of Cost Allocation in Newsvendor Inventory Centralization"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:55","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-05-25T12:00:00-04:00","event_time_end":"2004-05-25T01:00:00-04:00","event_time_end_last":"2004-05-25T01:00:00-04:00","gmt_time_start":"2004-05-25 16:00:00","gmt_time_end":"2004-05-25 05:00:00","gmt_time_end_last":"2004-05-25 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":""}},"61792":{"#nid":"61792","#data":{"type":"event","title":"STATISTICS SEMINAR:: Confidence Intervals for High Quantiles of A Heavy Tailed Distribution","body":[{"value":"\u003Cp\u003EEstimating high quantiles plays an important role in the context of\u003Cbr \/\u003E\nrisk management. This involves extrapolation of an unknown distribution\u003Cbr \/\u003E\nfunction beyond observations. Under consideration is construsting\u003Cbr \/\u003E\nconfidence intervals for high quantiles of a heavy tailed distribution.\u003Cbr \/\u003E\nIn this talk we introduce three methods, including the normal approximation\u003Cbr \/\u003E\nmethod based on Hill\u0027s estimator, the likelihood ratio method and the\u003Cbr \/\u003E\ndata tilting method. Our simulation study shows that the data tilting\u003Cbr \/\u003E\nmethod has a better performance in terms of the accuracy of coverage\u003Cbr \/\u003E\nprobabilities.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR:: Confidence Intervals for High Quantiles of A Heavy Tailed Distribution","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR:: Confidence Intervals for High Quantiles of A Heavy Tailed Distribution"}],"uid":"27279","created_gmt":"2010-10-08 11:39:07","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-08-26T13:00:00-04:00","event_time_end":"2004-08-26T01:00:00-04:00","event_time_end_last":"2004-08-26T01:00:00-04:00","gmt_time_start":"2004-08-26 17:00:00","gmt_time_end":"2004-08-26 05:00:00","gmt_time_end_last":"2004-08-26 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":""}},"61760":{"#nid":"61760","#data":{"type":"event","title":"Approximate Dynamic Programming for High-Dimensional Resource Allocation Problems","body":[{"value":"\u003Cp\u003EDynamic programming has long been relegated to small problems due to the well-known \u0022curse of dimensionality.\u0022  We show that there are actually three curses of dimensionality, but that these can be overcome by using a different form of the optimality equations along with carefully chosen functional approximations.  In particular, the use of separable, piecewise linear approximations of the value function is particularly well suited for discrete resource allocation problems, allowing us to solve dynamic programs where the dimensionality of the state variable is in the tens of thousands.  We illustrate these methods in the context of several large-scale freight transportation applications, and discuss research issues that have arisen in these applications.  One challenge has been the management of resources with complex attributes, which produces dynamic programs where the dimensionality of the state vector can measure in the millions.  We show how hierarchical learning strategies can be used to produce effective approximations, helping to solve the \u0022explore vs. exploit\u0022 dilemma that is well-known in approximate dynamic programming.  As a byproduct, the value functions provide accurate gradient information, avoiding the need to perform statistically unreliable \u0022what if\u0022 simulations to determine the effect of changes in fleet size and mix.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Approximate Dynamic Programming for High-Dimensional Resource Allocation Problems","format":"limited_html"}],"field_summary_sentence":[{"value":"Approximate Dynamic Programming for High-Dimensional Resource Allocation Problems"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-04T10:00:00-05:00","event_time_end":"2004-11-03T23:00:00-05:00","event_time_end_last":"2004-11-03T23:00:00-05:00","gmt_time_start":"2004-11-04 15:00:00","gmt_time_end":"2004-11-04 04:00:00","gmt_time_end_last":"2004-11-04 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":""}},"61787":{"#nid":"61787","#data":{"type":"event","title":"STATISTICS SEMINAR: Gamma-Minimax Inference Without Tears","body":[{"value":"\u003Cp\u003EIn the early 1950\u0027s Herbert Robbins (1915-2001)\u003Cbr \/\u003E\nintroduced the\u003Cbr \/\u003E\nGamma-Minimax or Bayes-Minimax Paradigm,\u003Cbr \/\u003E\nas a compromise between Minimax and Bayes\u003Cbr \/\u003E\nParadigms. Gamma-Minimax actions rely on\u003Cbr \/\u003E\nMin-Max type theorems and are often hard or\u003Cbr \/\u003E\nimpossible to find.\n\u003C\/p\u003E\n\u003Cp\u003EIn this talk we overview linear approximations\u003Cbr \/\u003E\nto Gamma-minimax actions and demonstrate\u003Cbr \/\u003E\nthat in many decision theoretic problems\u003Cbr \/\u003E\nlinear approximations are not substantially affecting\u003Cbr \/\u003E\nthe risk of the decision maker.\n\u003C\/p\u003E\n\u003Cp\u003EThe talk is a mixture of educational and research overviews,\u003Cbr \/\u003E\nand does not assume prior exposure to minimaxity and\u003Cbr \/\u003E\nGamma-minimaxity.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR: Gamma-Minimax Inference Without Tears","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR: Gamma-Minimax Inference Without Tears"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-02T13:00:00-04:00","event_time_end":"2004-09-02T01:00:00-04:00","event_time_end_last":"2004-09-02T01:00:00-04:00","gmt_time_start":"2004-09-02 17:00:00","gmt_time_end":"2004-09-02 05:00:00","gmt_time_end_last":"2004-09-02 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":""}},"61755":{"#nid":"61755","#data":{"type":"event","title":"INFORMS Chapter Seminar :: OR Tools in Public Health","body":[{"value":"\u003Cp\u003EDr. Michael L. Washington earned his B.S. in Industrial and Systems Engineering\u003Cbr \/\u003E\nfrom the University of Florida, and his M.S. and Ph.D. in Industrial Engineering\u003Cbr \/\u003E\nfrom the University of South Florida. He currently works in the National Immunization\u003Cbr \/\u003E\nProgram at the Centers for Disease Control and Prevention in Atlanta, specializing\u003Cbr \/\u003E\nin applying OR techniques to public health issues. Dr. Washington has served\u003Cbr \/\u003E\nas a consultant for several foreign governments, and National Engineering Week\u003Cbr \/\u003E\nselected him as one of the top 16 young engineers in the nation in 2003. He was\u003Cbr \/\u003E\nnominated for a Service to America Medal for his Homeland Security efforts in\u003Cbr \/\u003E\ncreating a mass smallpox vaccinations computer model to help local officials\u003Cbr \/\u003E\nprepare for a bio-terrorist attack.\n\u003C\/p\u003E\n\u003Cp\u003EA reception will precede the meeting at 5:30. The meeting is open to all interested\u003Cbr \/\u003E\n  parties, and is free of charge. Refreshments will be served, and there will\u003Cbr \/\u003E\n  also be time to network with fellow OR professionals in the Atlanta community.\u003Cbr \/\u003E\n  The meeting will be in the Executive Classroom (Room 228) of the ISyE Main\u003Cbr \/\u003E\n  Entrance Bldg. (755 Ferst Drive, formerly the Dupree School of Management Building\u003Cbr \/\u003E\n  - same location as our previous meetings this year.) There is plenty of free\u003Cbr \/\u003E\n  parking next to the building after 5:00 PM.\u003C\/p\u003E\n\u003Cp\u003EMap\u003Cbr \/\u003E\u003Cbr \/\u003E\n\u003Ca href=\u0022http:\/\/www.isye.gatech.edu\/visitors\/maps\/\u0022 target=\u0022_blank\u0022\u003Ehttp:\/\/www.isye.gatech.edu\/visitors\/maps\/\u003Cbr \/\u003E\u003Cbr \/\u003E\n\u003C\/a\u003E\u003C\/p\u003E\n\u003Cp\u003EInforms Chapter Website\u003Cbr \/\u003E\u003Cbr \/\u003E\n  \u003Ca href=\u0022http:\/\/www.isye.gatech.edu\/%7Einforms\/atl_chapter\/index.html\u0022 target=\u0022_blank\u0022\u003Ehttp:\/\/www.isye.gatech.edu\/~informs\/atl_chapter\/index.html\u003C\/a\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"INFORMS Chapter Seminar :: OR Tools in Public Health","format":"limited_html"}],"field_summary_sentence":[{"value":"INFORMS Chapter Seminar :: OR Tools in Public Health"}],"uid":"27279","created_gmt":"2010-10-08 11:39:02","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-04T16:30:00-05:00","event_time_end":"2004-11-03T23:00:00-05:00","event_time_end_last":"2004-11-03T23:00:00-05:00","gmt_time_start":"2004-11-04 21:30:00","gmt_time_end":"2004-11-04 04:00:00","gmt_time_end_last":"2004-11-04 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":""}},"61793":{"#nid":"61793","#data":{"type":"event","title":"IFAC Symposium","body":[{"value":"\u003Cp\u003EThe IFAC Symposium will focus on Human-Machine Systems (HMS), Human Machine Interactions (HMI), and Human-Computer Interactions (HCI). Researchers and developers from both academia and industry are invited to meet to exchange ideas and present reports on new hardware and\/or software advances. The symposium will be held September 7-9, 2004 in Atlanta, GA.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"IFAC Symposium","format":"limited_html"}],"field_summary_sentence":[{"value":"IFAC Symposium"}],"uid":"27279","created_gmt":"2010-10-08 11:39:08","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-07T01:00:00-04:00","event_time_end":"2004-09-07T01:00:00-04:00","event_time_end_last":"2004-09-07T01:00:00-04:00","gmt_time_start":"2004-09-07 05:00:00","gmt_time_end":"2004-09-07 05:00:00","gmt_time_end_last":"2004-09-07 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":""}},"61783":{"#nid":"61783","#data":{"type":"event","title":"Stochastics Seminar :: Asymptotically Optimal Control of a Queue with Impatient Customers","body":"","field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Asymptotically Optimal Control of a Queue with Impatient Customers","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Asymptotically Optimal Control of a Queue with Impatient Customers"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-08T05:00:00-04:00","event_time_end":"2004-09-08T01:00:00-04:00","event_time_end_last":"2004-09-08T01:00:00-04:00","gmt_time_start":"2004-09-08 09:00:00","gmt_time_end":"2004-09-08 05:00:00","gmt_time_end_last":"2004-09-08 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":""}},"61777":{"#nid":"61777","#data":{"type":"event","title":"Stochastics Seminar :: Logical Control of Sequential Resource Allocation Systems","body":[{"value":"\u003Cp\u003ESpyros Reveliotis will continue his talk from last Wednesday.\n\u003C\/p\u003E\n\u003Cp\u003ESequential resource allocation systems (RAS) constitute a pertinent modeling abstraction for the operational dynamics of a broad range of contemporary technological applications, including production systems, material handling and railway \/ monorail systems, e-commerce and other service-related processes, and even computational environments like those emerging in internet-based computing. In all these environments, a set of concurrently executing processes contest for the sequential exclusive acquisition of a finite set of re-usable resources that are necessary to support the execution of their various processing stages. The resulting resource allocation process must be controlled for (i) operational efficiency, a requirement giving rise to scheduling problems in the context of these environments, but also, for (ii) logical correctness and inherent consistency, a requirement addressed by an emerging logical control theory for these systems. The effective logical control of the aforementioned applications becomes an even more important problem as these environments migrate to extensively automated operational modes.\n\u003C\/p\u003E\n\u003Cp\u003EThis talk will survey the state-of-the-art in RAS logical control. More specifically, the first part of the talk will provide a general description of the problem and a formal characterization of it in the Discrete Event Systems (Ramadge \u0026amp; Wonham\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Logical Control of Sequential Resource Allocation Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Logical Control of Sequential Resource Allocation Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-10T03:00:00-05:00","event_time_end":"2004-11-09T23:00:00-05:00","event_time_end_last":"2004-11-09T23:00:00-05:00","gmt_time_start":"2004-11-10 08:00:00","gmt_time_end":"2004-11-10 04:00:00","gmt_time_end_last":"2004-11-10 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":""}},"61788":{"#nid":"61788","#data":{"type":"event","title":"STATISTICS SEMINAR::Latent variable analysis for nonlinear structural modeling","body":[{"value":"\u003Cp\u003ELatent variable analysis is a multivariate statistical method that has been\u003Cbr \/\u003E\nuseful in various applied fields.  The method is now utilized in problems\u003Cbr \/\u003E\narising from business intelligence, system engineering, and public health,\u003Cbr \/\u003E\nin addition to those in behavioral\/social sciences.  In this talk, a\u003Cbr \/\u003E\ngeneral class of latent variable statistical models is considered in the\u003Cbr \/\u003E\nframework of structural equation system.  In such a system, observed\u003Cbr \/\u003E\nvariables are assumed to be related to latent factors, and relationships\u003Cbr \/\u003E\namong the unobservable factors are to be studied.  Recent results in\u003Cbr \/\u003E\nhandling various kinds of nonlinearity are presented.  Model fitting,\u003Cbr \/\u003E\nestimation, and inference procedures are discussed.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR::Latent variable analysis for nonlinear structural modeling","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR::Latent variable analysis for nonlinear structural modeling"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-09T13:00:00-04:00","event_time_end":"2004-09-09T01:00:00-04:00","event_time_end_last":"2004-09-09T01:00:00-04:00","gmt_time_start":"2004-09-09 17:00:00","gmt_time_end":"2004-09-09 05:00:00","gmt_time_end_last":"2004-09-09 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":""}},"61758":{"#nid":"61758","#data":{"type":"event","title":"Statistics Seminar :: Optimal Control of High Volume Assemble To Order Systems","body":[{"value":"\u003Cp\u003EWe consider a high volume assemble-to-order system with mulitple products\u003Cbr \/\u003E\nand components.  Our objective is to maximize infinite horizon expected\u003Cbr \/\u003E\ndiscounted profit.  We show that optimal product prices and component\u003Cbr \/\u003E\nproduction capacity result in utilization near 100%, so the system is in\u003Cbr \/\u003E\nheavy traffic.  We further show that heavy traffic remains the optimal\u003Cbr \/\u003E\noperating regime when customer orders must be assembled within a maximum\u003Cbr \/\u003E\ndelay, and component production can be expedited at some additional cost.\u003Cbr \/\u003E\nIn heavy traffic, the system exhibits a reduction in problem\u003Cbr \/\u003E\ndimensionaltiy.  The limiting diffusion approximation has dimension equal\u003Cbr \/\u003E\nto the number of components (rather than the number of components plus the\u003Cbr \/\u003E\nnumber of products).  We use this insight to propose discrete review\u003Cbr \/\u003E\npolicies for sequencing product orders for assembly in both of the\u003Cbr \/\u003E\naforementioned models.  When delay constraints are present, we\u003Cbr \/\u003E\nadditionally provide a policy for expediting components at discrete review\u003Cbr \/\u003E\ntime points.  We show our discrete review policies are asymptotically\u003Cbr \/\u003E\noptimal in heavy traffic.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar :: Optimal Control of High Volume Assemble To Order Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar :: Optimal Control of High Volume Assemble To Order Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:39:02","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-11T11:00:00-05:00","event_time_end":"2004-11-10T23:00:00-05:00","event_time_end_last":"2004-11-10T23:00:00-05:00","gmt_time_start":"2004-11-11 16:00:00","gmt_time_end":"2004-11-11 04:00:00","gmt_time_end_last":"2004-11-11 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":""}},"61784":{"#nid":"61784","#data":{"type":"event","title":"Statistics Seminar:: Quasi-likelihood Estimation for GLM with Random Scales","body":[{"value":"\u003Cp\u003EThis paper uses random scales similar to random effects used\u003Cbr \/\u003E\nin the generalized linear mixed models to describe\u003Cbr \/\u003E\n\u0022inter-location\u0022 population variation in variance components\u003Cbr \/\u003E\nfor modeling complicated data obtained from applications such as\u003Cbr \/\u003E\nantenna manufacturing. Our distribution studies lead to\u003Cbr \/\u003E\na complicated integrated extended quasi-likelihood (IEQL) for\u003Cbr \/\u003E\nparameter estimations and large sample inference derivations.\u003Cbr \/\u003E\nLaplace\u0027s expansion and several approximation methods\u003Cbr \/\u003E\nare employed to simplify the IEQL estimation procedures.\u003Cbr \/\u003E\nAsymptotic properties of the approximate IEQL estimates are\u003Cbr \/\u003E\nderived for general structures of the covariance matrix of random scales.\u003Cbr \/\u003E\nFocusing on a few special covariance structures in simpler forms,\u003Cbr \/\u003E\nthe authors further simplify IEQL estimates such that the typically used software\u003Cbr \/\u003E\ntools such as weighted regression can perform the estimates easily.\u003Cbr \/\u003E\nMoreover, these special cases\u003Cbr \/\u003E\nallow us to derive interesting asymptotic results in much more\u003Cbr \/\u003E\ncompact expressions.  Finally, numerical simulation results show that IEQL estimates\u003Cbr \/\u003E\nperform very well in several special cases studied.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar:: Quasi-likelihood Estimation for GLM with Random Scales","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar:: Quasi-likelihood Estimation for GLM with Random Scales"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-15T14:00:00-04:00","event_time_end":"2004-09-15T01:00:00-04:00","event_time_end_last":"2004-09-15T01:00:00-04:00","gmt_time_start":"2004-09-15 18:00:00","gmt_time_end":"2004-09-15 05:00:00","gmt_time_end_last":"2004-09-15 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":""}},"61790":{"#nid":"61790","#data":{"type":"event","title":"ISyE Faculty Meeting","body":"","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 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-16T11:15:00-04:00","event_time_end":"2004-09-16T01:00:00-04:00","event_time_end_last":"2004-09-16T01:00:00-04:00","gmt_time_start":"2004-09-16 15:15:00","gmt_time_end":"2004-09-16 05:00:00","gmt_time_end_last":"2004-09-16 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":""}},"61773":{"#nid":"61773","#data":{"type":"event","title":"Dissertation Defense :: Dynamic Sequencing of Jobs on Conveyor Systems for Minimizing Changeovers","body":[{"value":"\u003Cp\u003EThis research investigates the problem of constrained sequencing of a set of jobs on a conveyor system with the objective of minimizing setup cost.  A setup cost is associated with extra material, labor, or energy required due to the change of attributes in consecutive jobs at processing stations.  A finite set of attributes are considered in this research.  Sequencing is constrained by the availability of two elements - storage buffers and conveyor junctions.  The problem is motivated by the paint purge reduction problem at a major U.S. automotive manufacturer.  First, a diverging junction with a sequence-independent setup cost and predefined attributes is modeled as an assignment problem and this model is extended by relaxing the initial assumptions in various ways.  We also model the constrained sequencing problem with an off-line buffer and develop heuristics for efficiently getting a good quality solution by exploiting the special problem structure.  Finally, we conduct sensitivity analysis using numerical experiments, explain the case study, and discuss the use of the simulation model as a supplementary tool for analyzing the constrained sequencing problem.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Dissertation Defense :: Dynamic Sequencing of Jobs on Conveyor Systems for Minimizing Changeovers","format":"limited_html"}],"field_summary_sentence":[{"value":"Dissertation Defense :: Dynamic Sequencing of Jobs on Conveyor Systems for Minimizing Changeovers"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-21T15:00:00-04:00","event_time_end":"2004-09-21T01:00:00-04:00","event_time_end_last":"2004-09-21T01:00:00-04:00","gmt_time_start":"2004-09-21 19:00:00","gmt_time_end":"2004-09-21 05:00:00","gmt_time_end_last":"2004-09-21 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":""}},"61782":{"#nid":"61782","#data":{"type":"event","title":"Stochastics Seminar :: Inter-Departure Times in Base-Stock Inventory Queues","body":[{"value":"\u003Cp\u003EAn inventory-queue is an inventory system controlled by a processing station with queueing.  They are natural building blocks for supply chain models.  An important and largely open issue for inventory queues is the characterization of their departure processes.  In an inventory-queue, departures are triggered either by a job arrival when the output buffer is not empty or otherwise by a service completion.  Such departures are more difficult to analyze than departures from a standard queue.  The main results in this study are expressions for the probability distributions and squared coefficients of variation of inter-departure times for base-stock inventory-queues with birth-death production processes.\n\u003C\/p\u003E\n\u003Cp\u003E(Joint work with Liwei Bai (Georgia Tech), Liming Liu and Weixin Shang (Hong Kong Univ. of Sci. and Tech.)). Based on the paper, L. Bai, B. Fralix, L. Liu, and W. Shang.  Inter-Departure Times in Base-Stock Inventory-Queues.  Queueing Systems 47 (2004) 345-361.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Inter-Departure Times in Base-Stock Inventory Queues","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Inter-Departure Times in Base-Stock Inventory Queues"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-22T05:00:00-04:00","event_time_end":"2004-09-22T01:00:00-04:00","event_time_end_last":"2004-09-22T01:00:00-04:00","gmt_time_start":"2004-09-22 09:00:00","gmt_time_end":"2004-09-22 05:00:00","gmt_time_end_last":"2004-09-22 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":""}},"61774":{"#nid":"61774","#data":{"type":"event","title":"Statistics Seminar:: Robust parameter design with feedback control","body":[{"value":"\u003Cp\u003ERobust parameter design has been widely used as a cost effective\u003Cbr \/\u003E\ntool to reduce process variability by appropriate selection of\u003Cbr \/\u003E\ncontrol factors  to make the process insensitive to noise.\u003Cbr \/\u003E\nHowever, when there exists strong noise factors in the process,\u003Cbr \/\u003E\nrobust parameter design alone may not be effective and an on-line\u003Cbr \/\u003E\ncontrol strategy can be used to compensate for the effect of\u003Cbr \/\u003E\nnoise. In this paper, a parameter design methodology in the\u003Cbr \/\u003E\npresence of feedback control is developed. Systems with pure-gain\u003Cbr \/\u003E\ndynamic model are considered and the best proportional-integral\u003Cbr \/\u003E\n(PI) and minimum mean squared error (MMSE) control strategies are\u003Cbr \/\u003E\ndeveloped by using robust parameter design. The proposed method is\u003Cbr \/\u003E\nillustrated using a real life example from a urea packing plant.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar:: Robust parameter design with feedback control","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar:: Robust parameter design with feedback control"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-22T14:00:00-04:00","event_time_end":"2004-09-22T01:00:00-04:00","event_time_end_last":"2004-09-22T01:00:00-04:00","gmt_time_start":"2004-09-22 18:00:00","gmt_time_end":"2004-09-22 05:00:00","gmt_time_end_last":"2004-09-22 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":""}},"61776":{"#nid":"61776","#data":{"type":"event","title":"Stochastics Seminar :: Performance Modeling, Analysis, and Control of Capacitated Re-entrant Lines","body":[{"value":"\u003Cp\u003EThe basic definition of the re-entrant line, which constitutes the typical abstraction for the formal modeling and analysis of the fab scheduling problem, considers only the job contest for the finite processing capacity of the system workstations, while ignoring completely the effects and complications arising from additional operational issues like the finite buffering capacity of the system workstation \/ production units. Moreover, the operational policies developed to control these logical aspects of the system behavior introduce additional constraints to the fab scheduling problem, that complicate it even further and, more importantly, invalidate prior characterizations of its optimal solutions. \n\u003C\/p\u003E\n\u003Cp\u003EMotivated by these remarks, we consider the problem of performance modeling, analysis and control of capacitated, flexibly automated re-entrant lines. Specifically, we develop an analytical framework for the modeling, analysis and control of capacitated re-entrant lines, which is based on Generalized Stochastic Petri nets (GSPN) framework. Furthermore, the underlying scheduling problem is transformed to a Markov Decision Process (MDP) problem and finally, we suggest a systematic, efficient and scalable approximating scheme, which is based on the Neuro-Dynamic Programming (NDP) theory, for the optimal scheduling policy characterized in the GSPN \/ MDP framework. The quality of the obtained approximations is experimentally assessed by\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Performance Modeling, Analysis, and Control of Capacitated Re-entrant Lines","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Performance Modeling, Analysis, and Control of Capacitated Re-entrant Lines"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-17T03:00:00-05:00","event_time_end":"2004-11-16T23:00:00-05:00","event_time_end_last":"2004-11-16T23:00:00-05:00","gmt_time_start":"2004-11-17 08:00:00","gmt_time_end":"2004-11-17 04:00:00","gmt_time_end_last":"2004-11-17 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":""}},"61771":{"#nid":"61771","#data":{"type":"event","title":"Revenue Management","body":"","field_subtitle":"","field_summary":[{"value":"Revenue Management","format":"limited_html"}],"field_summary_sentence":[{"value":"Revenue Management"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-22T15:15:00-04:00","event_time_end":"2004-09-22T01:00:00-04:00","event_time_end_last":"2004-09-22T01:00:00-04:00","gmt_time_start":"2004-09-22 19:15:00","gmt_time_end":"2004-09-22 05:00:00","gmt_time_end_last":"2004-09-22 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":""}},"61772":{"#nid":"61772","#data":{"type":"event","title":"ISyE Welcome Back Picnic","body":[{"value":"\u003Cp\u003EISyE is hosting a Welcome Back Picnic for its students Thursday, September 23 from 11:30am - 1:30pm.  It will be an old fashioned cookout with hotdogs, hamburgers, baked beans and more.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Welcome Back Picnic","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Welcome Back Picnic"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-23T12:30:00-04:00","event_time_end":"2004-09-23T01:00:00-04:00","event_time_end_last":"2004-09-23T01:00:00-04:00","gmt_time_start":"2004-09-23 16:30:00","gmt_time_end":"2004-09-23 05:00:00","gmt_time_end_last":"2004-09-23 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":""}},"61769":{"#nid":"61769","#data":{"type":"event","title":"O\u0026D-based Demand Driven Dispatch: Integrating Airline Scheduling, Pricing and Revenue Management for Short-term Re-fleeting","body":"","field_subtitle":"","field_summary":[{"value":"O\u0026amp;D-based Demand Driven Dispatch: Integrating Airline Scheduling, Pricing and Revenue Management for Short-term Re-fleeting","format":"limited_html"}],"field_summary_sentence":[{"value":"O\u0026D-based Demand Driven Dispatch: Integrating Airline Scheduling, Pricing and Revenue Management for Short-term Re-fleeting"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-29T13:00:00-04:00","event_time_end":"2004-09-29T01:00:00-04:00","event_time_end_last":"2004-09-29T01:00:00-04:00","gmt_time_start":"2004-09-29 17:00:00","gmt_time_end":"2004-09-29 05:00:00","gmt_time_end_last":"2004-09-29 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":""}},"61770":{"#nid":"61770","#data":{"type":"event","title":"Exploring Relaxation Induced Neighborhoods to Improve MIP Solutions","body":[{"value":"\u003Cp\u003EGiven a feasible solution to a Mixed Integer Programming (MIP) model, a natural question is whether that solution can be improved using local search techniques.  Local search has been applied very successfully in a variety of other combinatorial optimization domains.  Unfortunately, local search relies extensively on the notion  of\u003Cbr \/\u003E\na solution neighborhood, and this neighborhood is almost always  tailored to the structure of the particular problem being solved.  A MIP  model typically conveys little information about the underlying problem structure.  This talk will consider two new approaches to exploring\u003Cbr \/\u003E\ninteresting, domain-independent neighborhoods in MIP.  The more\u003Cbr \/\u003E\neffective of the two, which we call Relaxation Induced Neighborhood Search (RINS), constructs a promising neighborhood using information\u003Cbr \/\u003E\ncontained in the continuous relaxation of the MIP model. Neighborhood exploration is then formulated as a MIP model itself and solved recursively.  The second, which we call guided dives, is a simple\u003Cbr \/\u003E\nmodification of the MIP tree traversal order.  Loosely speaking, it guides the search towards nodes that are close neighbors of the best known feasible solution. Extensive computational experiments on very\u003Cbr \/\u003E\ndifficult MIP models show that both approaches outperform default CPLEX MIP and a previously described approach for exploring MIP neighborhoods (local branching) with respect to several different metrics. The metrics\u003Cbr \/\u003E\nwe consider are quality of the best integer solution produced within a time limit, ability to improve a given integer solution (of both good  and poor quality), and time required to diversify the search in order to  find a new solution.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Exploring Relaxation Induced Neighborhoods to Improve MIP Solutions","format":"limited_html"}],"field_summary_sentence":[{"value":"Exploring Relaxation Induced Neighborhoods to Improve MIP Solutions"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-30T12:00:00-04:00","event_time_end":"2004-09-30T01:00:00-04:00","event_time_end_last":"2004-09-30T01:00:00-04:00","gmt_time_start":"2004-09-30 16:00:00","gmt_time_end":"2004-09-30 05:00:00","gmt_time_end_last":"2004-09-30 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":""}},"61759":{"#nid":"61759","#data":{"type":"event","title":"Ambiguous chance constrained problems and robust optimization","body":[{"value":"\u003Cp\u003ELet x denote a vector of n decision variables and Y denote a random vector. A constraint of the form P(f(x,Y) \u0026gt; 0) \u0026lt; eps\u003Cbr \/\u003E\nis called a chance constraint on the decision variable x. Optimization problems with chance constraints are notoriously hard to solve.\n\u003C\/p\u003E\n\u003Cp\u003EA simple strategy for solving chance constrained  problems is to generate N samples according to the distribution P and then impose the constraints  f(x,Y_i) \u0026lt; 0, for all i = 1, ..., N (*)\u003Cbr \/\u003E\nSince Y_i are random samples, there is no hope that decision\u003Cbr \/\u003E\nvariables x that are feasible for (*) are all feasible for the chance\u003Cbr \/\u003E\nconstraint with probability 1. Therefore, one has to allow a probability of error delta. Question: How large should N be as a function of eps and\u003Cbr \/\u003E\ndelta ?\n\u003C\/p\u003E\n\u003Cp\u003ERecently, Calafiore and Campi showed that when f(x,Y) is a convex function of x for every fixed Y we only need N =O(n\/delta log(1\/eps)). Nemirovski and Shapiro have shown that if the function f(x,Y) is bi-affine and the distribution P has a \u0022concentration-of-measure\u0022 property the number of samples required drops to N = O(n log(1\/(eps*delta))). \n\u003C\/p\u003E\n\u003Cp\u003EIn many applications of chance constrained problems the distribution P is not completely known, i.e. the distribution is ambiguous. The natural\u003Cbr \/\u003E\nconstraint to impose in this setting is the ambiguous chance constraint:\u003Cbr \/\u003E\nmax_{P in M} {P(f(x,Y) \u0026gt; 0)} \u0026lt; eps, where M is an uncertainty set of distributions. In this talk we discuss how to extend many results known for chance constrained problems to this more general setting. Robust deterministic optimization naturally arises\u003Cbr \/\u003E\nin these extensions by way of the Strassen-Dudley representation theorem.\n\u003C\/p\u003E\n\u003Cp\u003E(Joint work with Emre Erdogan)\n\u003C\/p\u003E\n\u003Cp\u003EBrief Bio: Garud Iyengar received his PhD in Electrical Engineering from Stanford University in 1998. Since then he has been with the Industrial Engineering and Operations Research (IEOR) department at Columbia\u003Cbr \/\u003E\nUniversity where he is currently an Associate Professor.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Ambiguous chance constrained problems and robust optimization","format":"limited_html"}],"field_summary_sentence":[{"value":"Ambiguous chance constrained problems and robust optimization"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-18T10:00:00-05:00","event_time_end":"2004-11-17T23:00:00-05:00","event_time_end_last":"2004-11-17T23:00:00-05:00","gmt_time_start":"2004-11-18 15:00:00","gmt_time_end":"2004-11-18 04:00:00","gmt_time_end_last":"2004-11-18 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":""}},"61785":{"#nid":"61785","#data":{"type":"event","title":"Statistics Seminar::American-style Options Pricing by Adaptive Simulation","body":[{"value":"\u003Cp\u003EWe propose a novel simulation approach for pricing American-style contingent claims. We develop an adaptive policy search algorithm for searching the optimal policy in exercising an American-style option. The option price is obtained by first estimating the optimal option exercising policy and then evaluating the option with the estimated policy through simulation. Both high-biased and low-biased estimators of the option price are obtained.  We show that the proposed algorithm leads to the convergence to the true optimal policy with probability one. This policy search algorithm requires little knowledge about the structure of the optimal policy and can be naturally implemented by parallel computing methods. As illustrative examples, computational results on pricing regular American options and American-Asian options are reported and they indicate that our algorithm is faster than certain alternative American option pricing algorithms reported in the literature. ((joint work with Sunjoo Lee).\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar::American-style Options Pricing by Adaptive Simulation","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar::American-style Options Pricing by Adaptive Simulation"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-30T13:00:00-04:00","event_time_end":"2004-09-30T01:00:00-04:00","event_time_end_last":"2004-09-30T01:00:00-04:00","gmt_time_start":"2004-09-30 17:00:00","gmt_time_end":"2004-09-30 05:00:00","gmt_time_end_last":"2004-09-30 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":""}},"61767":{"#nid":"61767","#data":{"type":"event","title":"Thesis Defense :: Dynamic Scheduling of Open Multiclass  Queueing Networks in a Slowly Changing Environment","body":[{"value":"\u003Cp\u003EWe study the scheduling policies for high-speed communication networks with time varying traffic patterns. We model such networks as open multiclass queueing networks operating in a slowly  changing environment.\n\u003C\/p\u003E\n\u003Cp\u003EWe assume that there are finite environment states and the changing environment is modeled as a general stochastic process which takes discrete values. At each state of the environment, the network operates as a queueing network where each server may serve multiple classes of customers. In this study, we establish a framework to search for asymptotically optimal scheduling policies for such queueing networks. We first show that open queueing networks in a slowly changing environment can be approximated by their fluid analog, stochastic fluid models, when the network speed increases. Given a solution of the stochastic fluid model, we provide a method to derive suitable scheduling policies for the original queueing networks. We further show that the queueing networks operating under the derived policies converge to the corresponding stochastic fluid model . This result implies that the derived scheduling policies are asymptotically optimal if the given stochastic fluid model solution is optimal.  We also study a stochastic fluid model to  investigate the optimal resource allocation policies of Web servers serving heterogeneous classes where the Web servers may be overloaded and operate under Quality of Service contracts.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Dynamic Scheduling of Open Multiclass  Queueing Networks in a Slowly Changing Environment","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Dynamic Scheduling of Open Multiclass  Queueing Networks in a Slowly Changing Environment"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-09-30T16:00:00-04:00","event_time_end":"2004-09-30T01:00:00-04:00","event_time_end_last":"2004-09-30T01:00:00-04:00","gmt_time_start":"2004-09-30 20:00:00","gmt_time_end":"2004-09-30 05:00:00","gmt_time_end_last":"2004-09-30 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":""}},"61756":{"#nid":"61756","#data":{"type":"event","title":"Faculty Meeting","body":[{"value":"\u003Cp\u003EAs noted in ISyE related email.\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 11:39:02","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-30T10:00:00-05:00","event_time_end":"2004-11-29T23:00:00-05:00","event_time_end_last":"2004-11-29T23:00:00-05:00","gmt_time_start":"2004-11-30 15:00:00","gmt_time_end":"2004-11-30 04:00:00","gmt_time_end_last":"2004-11-30 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":""}},"61766":{"#nid":"61766","#data":{"type":"event","title":"Second Annual ISyE Ph.D. Pre-game Picnic","body":[{"value":"\u003Cp\u003EI am pleased to announce that the Second Annual ISyE Ph.D. Pregame Picnic will be held this Friday, October 1 from 4-7 P.M. on the IC Lawn, weather permitting.\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\u003EThe menu will include, but not be limited to:  hamburgers, veggie burgers, beef hot dogs, grilled chicken, vegetarian baked beans, and potato salad.\u003Cbr \/\u003E\nWater and soda will be provided as well.  ALCOHOL IS PROHIBITED.\n\u003C\/p\u003E\n\u003Cp\u003EWe are also planning to have a volleyball setup and, if enough interested faculty attend, a faculty vs student volleyball match.\n\u003C\/p\u003E\n\u003Cp\u003EIf you would like to attend this event, please respond to this email no later than Thursday, September 30, at 5 P.M. with the following\u003Cbr \/\u003E\ninformation:\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:\u003Cbr \/\u003E\nNames of Adult Guests:\u003Cbr \/\u003E\nNames 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 3:00 P.M.\u003Cbr \/\u003E\n2.  Volleyball setup at approximately 3:30 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 these, please indicate that in your reply as well.  Your help would be greatly appreciated.\n\u003C\/p\u003E\n\u003Cp\u003EThank you, and we look forward to enjoying your fellowship on Friday!!! :)\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Second Annual ISyE Ph.D. Pre-game Picnic","format":"limited_html"}],"field_summary_sentence":[{"value":"Second Annual ISyE Ph.D. Pre-game Picnic"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-01T17:00:00-04:00","event_time_end":"2004-10-01T01:00:00-04:00","event_time_end_last":"2004-10-01T01:00:00-04:00","gmt_time_start":"2004-10-01 21:00:00","gmt_time_end":"2004-10-01 05:00:00","gmt_time_end_last":"2004-10-01 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":""}},"61803":{"#nid":"61803","#data":{"type":"event","title":"Advanced Design Integration for Radical Energy Efficiency","body":"","field_subtitle":"","field_summary":[{"value":"Advanced Design Integration for Radical Energy Efficiency","format":"limited_html"}],"field_summary_sentence":[{"value":"Advanced Design Integration for Radical Energy Efficiency"}],"uid":"27279","created_gmt":"2010-10-08 11:42:10","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-03-17T15:00:00-05:00","event_time_end":"2004-03-16T23:00:00-05:00","event_time_end_last":"2004-03-16T23:00:00-05:00","gmt_time_start":"2004-03-17 20:00:00","gmt_time_end":"2004-03-17 04:00:00","gmt_time_end_last":"2004-03-17 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":""}},"61775":{"#nid":"61775","#data":{"type":"event","title":"Stochastics Seminar :: Derivative Free Algorithms for Stochastic Optimization","body":[{"value":"\u003Cp\u003EIn this talk, we consider a class of trust region algorithms to solve\u003Cbr \/\u003E\nstochastic programming problems that satisfy the following properties:\n\u003C\/p\u003E\n\u003Cp\u003E(1) The objective function can only be evaluated with some error,\u003Cbr \/\u003E\nfor example by and at high computational cost.\n\u003C\/p\u003E\n\u003Cp\u003Eb) The error can be decreased with more computational effort.\u003Cbr \/\u003E\nc) The higher order derivatives of the objective function are unavailable.\u003Cbr \/\u003E\nThough our work is motivated from problems arising in stochastic simulation\u003Cbr \/\u003E\noptimization (Eg.Revenue Management), such optimization problems also commonly arise in\u003Cbr \/\u003E\nengineering design (Eg. helicopter rotor blade design).\u003Cbr \/\u003E\nDue to the high cost of evaluating the objective function, our aim is\u003Cbr \/\u003E\nto develop convergent algorithms that can solve such problems\u003Cbr \/\u003E\nwhile requiring the fewest possible number of evaluations of the\u003Cbr \/\u003E\nobjective function.\n\u003C\/p\u003E\n\u003Cp\u003EWhen the objective function and its gradient can be evaluated easily\u003Cbr \/\u003E\nand exactly, a typical trust region algorithm works as follows.\u003Cbr \/\u003E\nAt each iteration, we first construct a polynomial model function, typically a\u003Cbr \/\u003E\ntruncated Taylor series expansion of the objective at the\u003Cbr \/\u003E\ncurrent iterate, that approximates the objective function\u003Cbr \/\u003E\nin a certain neighborhood of the current iterate called\u003Cbr \/\u003E\nthe trust region. We then optimize this model function within the trust\u003Cbr \/\u003E\nregion. Depending on whether the resulting\u003Cbr \/\u003E\noptimal solution has a lower objective function value or not, we\u003Cbr \/\u003E\neither set this as the next iterate or conversely, alter the trust\u003Cbr \/\u003E\nregion size and\/or the model function appropriately and try again. \n\u003C\/p\u003E\n\u003Cp\u003ESince in our case,  the objective function and its higher order\u003Cbr \/\u003E\nderivatives cannot be evaluated exactly, we cannot use a Taylor series\u003Cbr \/\u003E\nbased model function. Accordingly, we propose\u003Cbr \/\u003E\nalternative linear or quadratic polynomial\u003Cbr \/\u003E\nmodel functions that are constructed by linear regression using only\u003Cbr \/\u003E\nsample average approximations of the objective, evaluated at points\u003Cbr \/\u003E\nin the neighborhood of the current iterate. We describe the various\u003Cbr \/\u003E\nchanges that have to be made to the traditional trust region framework\u003Cbr \/\u003E\nin order to successfully construct and control the accuracy of such regression\u003Cbr \/\u003E\nbased model functions and present the convergence theory  for the\u003Cbr \/\u003E\nresulting modified trust region algorithm. Finally, we provide\u003Cbr \/\u003E\ncomputational results for such an algorithm run on selected problems\u003Cbr \/\u003E\nfrom the CUTE test set.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Derivative Free Algorithms for Stochastic Optimization","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Derivative Free Algorithms for Stochastic Optimization"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-12-01T03:00:00-05:00","event_time_end":"2004-11-30T23:00:00-05:00","event_time_end_last":"2004-11-30T23:00:00-05:00","gmt_time_start":"2004-12-01 08:00:00","gmt_time_end":"2004-12-01 04:00:00","gmt_time_end_last":"2004-12-01 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":""}},"61768":{"#nid":"61768","#data":{"type":"event","title":"ISyE Meet \u0026 Mingle","body":[{"value":"\u003Cp\u003EISyE will be hosting a reception  in the main building lounge area for families of IE students to MEET AND MINGLE with the faculty! This is an opportunity for parents to meet their child\u0027s teachers. We do not plan a formal program.  Please mark this on your calendars and attend!\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Meet \u0026amp; Mingle","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Meet \u0026 Mingle"}],"uid":"27279","created_gmt":"2010-10-08 11:39:04","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-01T17:00:00-04:00","event_time_end":"2004-10-01T01:00:00-04:00","event_time_end_last":"2004-10-01T01:00:00-04:00","gmt_time_start":"2004-10-01 21:00:00","gmt_time_end":"2004-10-01 05:00:00","gmt_time_end_last":"2004-10-01 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":""}},"61781":{"#nid":"61781","#data":{"type":"event","title":"Stochastics Seminar :: Generalized Jackson Networks with Reneging and the Regulated Ornstein-Uhlenbeck Process","body":[{"value":"\u003Cp\u003EWe consider a generalized Jackson network with reneging customers in heavy traffic.  In particular, each customer joining a particular station may abandon the network if his service does not begin within a station-dependent, exponential, amount of time.  We establish that in heavy traffic this system can be approximated by a multi-dimensional regulated Ornstein-Uhlenbeck process (RO-U).  We also derive necessary and sufficient conditions under which the RO-U has a stationary distribution, explicitly determining the analytical form of this distribution under some special conditions.\u003Cbr \/\u003E\n(Joint with Amy Ward)\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Generalized Jackson Networks with Reneging and the Regulated Ornstein-Uhlenbeck Process","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Generalized Jackson Networks with Reneging and the Regulated Ornstein-Uhlenbeck Process"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-06T05:00:00-04:00","event_time_end":"2004-10-06T01:00:00-04:00","event_time_end_last":"2004-10-06T01:00:00-04:00","gmt_time_start":"2004-10-06 09:00:00","gmt_time_end":"2004-10-06 05:00:00","gmt_time_end_last":"2004-10-06 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":""}},"61765":{"#nid":"61765","#data":{"type":"event","title":"Statistics Seminar :: CUSUM charts for preliminary analysis of individual observations","body":[{"value":"\u003Cp\u003EA preliminary Cusum chart based on individual observations is developed from\u003Cbr \/\u003E\nthe uniformly most powerful test for the detection of linear trends. This\u003Cbr \/\u003E\nCusum chart is compared with several of its alternatives which are based on\u003Cbr \/\u003E\nthe likelihood ratio test and on transformations of standardized recursive\u003Cbr \/\u003E\nresiduals on which for instance the Q-chart methodology is based. It turns\u003Cbr \/\u003E\nout that the proposed Cusum chart is not only superior in the detection of\u003Cbr \/\u003E\nlinear trend out-of-control conditions, but also in the detection of other\u003Cbr \/\u003E\nout-of-control situations considered in this paper. Approximate control\u003Cbr \/\u003E\nlimits, determined from simulation, and an example of its use in practice\u003Cbr \/\u003E\nare given for the proposed Cusum chart. (Joint work with Ronald Does,\u003Cbr \/\u003E\nUniversity of Amsterdam).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar :: CUSUM charts for preliminary analysis of individual observations","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar :: CUSUM charts for preliminary analysis of individual observations"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-06T14:00:00-04:00","event_time_end":"2004-10-06T01:00:00-04:00","event_time_end_last":"2004-10-06T01:00:00-04:00","gmt_time_start":"2004-10-06 18:00:00","gmt_time_end":"2004-10-06 05:00:00","gmt_time_end_last":"2004-10-06 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":""}},"61802":{"#nid":"61802","#data":{"type":"event","title":"Statistics Seminar:: BAYESIAN DECISION THEORETIC SCALE-ADAPTIVE ESTIMATION OF A LOG-SPECTRAL DENSITY","body":[{"value":"\u003Cp\u003EThe problem of estimating the log-spectrum of a\u003Cbr \/\u003E\n stationary Gaussian time series by Bayesianly induced\u003Cbr \/\u003E\n shrinkage of empirical wavelet coefficients is studied.\u003Cbr \/\u003E\n A model in the wavelet domain that\u003Cbr \/\u003E\n accounts for distributional properties of the log-periodogram\u003Cbr \/\u003E\n at levels of fine detail and approximate normality  at\u003Cbr \/\u003E\n coarse levels in the wavelet decomposition, is proposed.\u003Cbr \/\u003E\n The smoothing procedure, called BAMS-LP (Bayesian Adaptive Multiscale\u003Cbr \/\u003E\n Shrinker of Log-Periodogram),\u003Cbr \/\u003E\n ensures that the reconstructed log-spectrum is\u003Cbr \/\u003E\n as noise-free as possible. It is also shown that the resulting\u003Cbr \/\u003E\n Bayes estimators are asymptotically optimal (in the frequentist sense).\n\u003C\/p\u003E\n\u003Cp\u003E Comparisons with non-wavelet and wavelet-non-Bayesian\u003Cbr \/\u003E\n methods are discussed.\n\u003C\/p\u003E\n\u003Cp\u003EThis is a joint work with Marianna Pensky from UCF.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar:: BAYESIAN DECISION THEORETIC SCALE-ADAPTIVE ESTIMATION OF A LOG-SPECTRAL DENSITY","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar:: BAYESIAN DECISION THEORETIC SCALE-ADAPTIVE ESTIMATION OF A LOG-SPECTRAL DENSITY"}],"uid":"27279","created_gmt":"2010-10-08 11:42:09","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-03-25T11:00:00-05:00","event_time_end":"2004-03-24T23:00:00-05:00","event_time_end_last":"2004-03-24T23:00:00-05:00","gmt_time_start":"2004-03-25 16:00:00","gmt_time_end":"2004-03-25 04:00:00","gmt_time_end_last":"2004-03-25 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":""}},"61800":{"#nid":"61800","#data":{"type":"event","title":"Statistics seminar:: Modeling and Analysis of Population Evolution Data","body":[{"value":"\u003Cp\u003EThe last two decades have seen an explosion of novel ideas in the areas of biotechnology and information technology. The impact of these discoveries are being felt in diverse areas such as genetics, finance, e-commerce, biology, and internet traffic, to mention a few. The scientific experiments carried out using these modern technologies are yielding data that possess an \u0022evolutionary branching process like structure\u0022. In this talk I will describe  statistical models and methodologies to understand, analyze, and interpret the data emerging from these experiments. More specifically, I will focus on the data resulting from polymerase chain reaction experiments. \n\u003C\/p\u003E\n\u003Cp\u003EThe modeling and the methodological part of this talk are motivated by the following three scientific questions: \n\u003C\/p\u003E\n\u003Cp\u003E(a)   How does one \u0022statistically quantify\u0022 the unknown amount of gene in a \u0022sample\u0022 using PCR amplification methods?\u003Cbr \/\u003E\n(b)  What are the factors affecting the amplification rate of a PCR experiment?\u003Cbr \/\u003E\n(c) How does one efficiently design experiments to study the mutations induced by PCR experiments? \n\u003C\/p\u003E\n\u003Cp\u003EStatistical quantification can lead to an accurate estimate of the HIV-1 viral load in HIV-1 infected patients. This not only helps with disease diagnosis but also in the disease prognosis. Answers to questions  (b) and (c) will facilitate a better understanding of the dynamics of a PCR process.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics seminar:: Modeling and Analysis of Population Evolution Data","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics seminar:: Modeling and Analysis of Population Evolution Data"}],"uid":"27279","created_gmt":"2010-10-08 11:42:09","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-01T11:00:00-05:00","event_time_end":"2004-03-31T23:00:00-05:00","event_time_end_last":"2004-03-31T23:00:00-05:00","gmt_time_start":"2004-04-01 16:00:00","gmt_time_end":"2004-04-01 04:00:00","gmt_time_end_last":"2004-04-01 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":""}},"61780":{"#nid":"61780","#data":{"type":"event","title":"Stochastics Seminar :: Tandem Lines with Dedicated and Flexible Servers","body":[{"value":"\u003Cp\u003EConsider a tandem queueing network with $Ngeq 2$ stations, $Mgeq 1$ servers, infinite supply of jobs in front of station 1, infinite room for completed jobs after station $N$, and either a finite or infinite buffer between any two consecutive stations. We study the dynamic allocation of servers to stations with the goal of maximizing the long-run average throughput, assuming that only a subset of the servers are flexible in that they are able to work at several stations, with the remaining servers being dedicated to particular stations.\n\u003C\/p\u003E\n\u003Cp\u003EAuthors: Sigrun Andradottir, Hayriye Ayhan, and Douglas G. Down\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Tandem Lines with Dedicated and Flexible Servers","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Tandem Lines with Dedicated and Flexible Servers"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-13T05:00:00-04:00","event_time_end":"2004-10-13T01:00:00-04:00","event_time_end_last":"2004-10-13T01:00:00-04:00","gmt_time_start":"2004-10-13 09:00:00","gmt_time_end":"2004-10-13 05:00:00","gmt_time_end_last":"2004-10-13 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":""}},"61801":{"#nid":"61801","#data":{"type":"event","title":"Statistics seminar:: Some recent developments in Stochastic Programming","body":[{"value":"\u003Cp\u003EIn this talk I will discuss two recent developments in the theory and\u003Cbr \/\u003E\npractice of stochastic programming. Namely, development of Monte Carlo\u003Cbr \/\u003E\nsimulation based optimization techniques and mathematical theory of risk\u003Cbr \/\u003E\nmeasures.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics seminar:: Some recent developments in Stochastic Programming","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics seminar:: Some recent developments in Stochastic Programming"}],"uid":"27279","created_gmt":"2010-10-08 11:42:09","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-08T13:00:00-04:00","event_time_end":"2004-04-08T01:00:00-04:00","event_time_end_last":"2004-04-08T01:00:00-04:00","gmt_time_start":"2004-04-08 17:00:00","gmt_time_end":"2004-04-08 05:00:00","gmt_time_end_last":"2004-04-08 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":""}},"61762":{"#nid":"61762","#data":{"type":"event","title":"Statistics Seminar:: Multi-Level Spatial Modelling with Application in Logistics System Analysis","body":[{"value":"\u003Cp\u003EMulti-level spatial models are proposed to approximate large size\u003Cbr \/\u003E\nlogistics network systems.  The linkage across different levels of spatial models\u003Cbr \/\u003E\nis specified through estimating equations to utilize information considered at different\u003Cbr \/\u003E\nstages. The multi-level models are applied in decision analysis of logistics systems\u003Cbr \/\u003E\nsuch as facility location allocation and demand forecasting problems. System\u003Cbr \/\u003E\nreliability of logistics service is introduced to characterize the uncertainty of\u003Cbr \/\u003E\nsupply chain disruptions.  In particular, a sum-of-disjoint-product (SDP) method\u003Cbr \/\u003E\nis presented to evaluate the system reliability. Real-life examples show the potential\u003Cbr \/\u003E\nuse of the models in characterizing logistics networks, assisting logistics planning\u003Cbr \/\u003E\nprocesses and evaluating network designs for dealing with unexpected supply chain\u003Cbr \/\u003E\ndisruption. (Joint work with J.-C. Lu and P. H. Kvam).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar:: Multi-Level Spatial Modelling with Application in Logistics System Analysis","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar:: Multi-Level Spatial Modelling with Application in Logistics System Analysis"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-13T14:00:00-04:00","event_time_end":"2004-10-13T01:00:00-04:00","event_time_end_last":"2004-10-13T01:00:00-04:00","gmt_time_start":"2004-10-13 18:00:00","gmt_time_end":"2004-10-13 05:00:00","gmt_time_end_last":"2004-10-13 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":""}},"61799":{"#nid":"61799","#data":{"type":"event","title":"Statistics seminar:: Finding the Best Regular Resolution IV Fractional Factorial Designs","body":[{"value":"\u003Cp\u003ETwo-level fractional factorial designs are among the most useful statistical designs for engineering applications.  This talk will review recent literature regarding the construction of these designs.  Topics will include alternative criteria based on the alias length pattern, and uses of the row coincidence matrix to help distinguish between designs.  A recently attempted complete enumeration of resolution IV designs for 128-run designs will be described.  The talk will conclude with the open problem of how to search for optimal resolution IV designs for even larger run size.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics seminar:: Finding the Best Regular Resolution IV Fractional Factorial Designs","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics seminar:: Finding the Best Regular Resolution IV Fractional Factorial Designs"}],"uid":"27279","created_gmt":"2010-10-08 11:42:09","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-15T13:00:00-04:00","event_time_end":"2004-04-15T01:00:00-04:00","event_time_end_last":"2004-04-15T01:00:00-04:00","gmt_time_start":"2004-04-15 17:00:00","gmt_time_end":"2004-04-15 05:00:00","gmt_time_end_last":"2004-04-15 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":""}},"61764":{"#nid":"61764","#data":{"type":"event","title":"Beyond the Scope of Interior Point Polynomial Time...","body":[{"value":"\u003Cp\u003EIn all known polynomial time algorithms of nonlinear convex optimization, the computational effort per iteration grows nonlinearly with the design dimension n of the problem (typically, as n3).  As a result, in the case of extremely large-scale (tens and hundreds thousands of variables) convex programs, a single iteration of a polynomial time algorithm can become too expensive to be practical. In these cases one is enforced to use\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Beyond the Scope of Interior Point Polynomial Time...","format":"limited_html"}],"field_summary_sentence":[{"value":"Beyond the Scope of Interior Point Polynomial Time..."}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-14T12:00:00-04:00","event_time_end":"2004-10-14T01:00:00-04:00","event_time_end_last":"2004-10-14T01:00:00-04:00","gmt_time_start":"2004-10-14 16:00:00","gmt_time_end":"2004-10-14 05:00:00","gmt_time_end_last":"2004-10-14 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":""}},"61796":{"#nid":"61796","#data":{"type":"event","title":"Second Annual ISyE Spring Festival","body":[{"value":"\u003Cp\u003EThe school year is coming to an end, and ISyE is hosting its second annual Spring Festival for our students this Friday, April 16 from 11:00am - 1:00pm.  \n\u003C\/p\u003E\n\u003Cp\u003EOnce again, our festival will feature a Mexican Fajita \u0026amp; Taco Bar.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Second Annual ISyE Spring Festival","format":"limited_html"}],"field_summary_sentence":[{"value":"Second Annual ISyE Spring Festival"}],"uid":"27279","created_gmt":"2010-10-08 11:39:08","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-16T12:00:00-04:00","event_time_end":"2004-04-16T01:00:00-04:00","event_time_end_last":"2004-04-16T01:00:00-04:00","gmt_time_start":"2004-04-16 16:00:00","gmt_time_end":"2004-04-16 05:00:00","gmt_time_end_last":"2004-04-16 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":""}},"61797":{"#nid":"61797","#data":{"type":"event","title":"ISyE Ph.D. End of the Year Bash","body":[{"value":"\u003Cp\u003EI am pleased to announce that the ISyE Ph.D. END OF THE YEAR BASH, sponsored by the Georgia Tech Chapter of INFORMS, will be held on FRIDAY, APRIL 16, 2004 from 3-7 P.M. on the LAWN BEHIND THE INSTRUCTIONAL CENTER.\n\u003C\/p\u003E\n\u003Cp\u003EFor those of you who came to our ISyE tailgate party this past October, this event will be very similar.  We will have a picnic-style setup again will GRILLED MEATS, CHIPS, AND DRINKS.  However, this time, we will have FRISBEES AND A VOLLEYBALL SET-UP in addition to other games and activities for your enjoyment.\n\u003C\/p\u003E\n\u003Cp\u003EWith regard to food, there will be NON-MEAT OPTIONS available for vegetarians.  In addition, there will be NO PORK among the meat products.\n\u003C\/p\u003E\n\u003Cp\u003EPLEASE RSVP NO LATER THAN THURSDAY, APRIL 15 USING THE FORM BELOW if you plan to attend. Like last time, THERE IS A $2 CHARGE FOR ALL ADULT GUESTS, BUT NO CHARGE FOR CHILDREN.  So, for those of you with families and\/or significant others, we encourage you to bring them, if possible.\n\u003C\/p\u003E\n\u003Cp\u003EName:\u003Cbr \/\u003E\nYears in ISyE:\u003Cbr \/\u003E\nNumber of Guests:\u003Cbr \/\u003E\nNames of Guests (Kids in Parentheses):\u003Cbr \/\u003E\nIf Date is Moved to 4\/30 Due To Rain, Can You Attend?\n\u003C\/p\u003E\n\u003Cp\u003E(The rest of the form is for Ph.D. students only.)  \n\u003C\/p\u003E\n\u003Cp\u003EConcentration:\u003Cbr \/\u003E\nAdvisor:\n\u003C\/p\u003E\n\u003Cp\u003EIn case of rain, the alternate date for the event has been set for Friday, April 30.  \n\u003C\/p\u003E\n\u003Cp\u003EThis event is being sponsored by the Georgia Tech Chapter of INFORMS, with approval from its faculty advisor Dr. Dave Goldsman.\n\u003C\/p\u003E\n\u003Cp\u003EThank you.\n\u003C\/p\u003E\n\u003Cp\u003EW. Brad Jones\n\u003C\/p\u003E\n\u003Cp\u003E_________________________________\u003Cbr \/\u003E\n_________________________________\u003Cbr \/\u003E\n  W. Brad Jones, Ph.D. Student\u003Cbr \/\u003E\n  Georgia Institute of Technology\u003Cbr \/\u003E\n  School of Industrial and Systems Engineering\u003Cbr \/\u003E\n  310 ISyE Main Building\u003Cbr \/\u003E\n  Atlanta, GA  30332\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Ph.D. End of the Year Bash","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Ph.D. End of the Year Bash"}],"uid":"27279","created_gmt":"2010-10-08 11:39:08","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-16T16:00:00-04:00","event_time_end":"2004-04-16T01:00:00-04:00","event_time_end_last":"2004-04-16T01:00:00-04:00","gmt_time_start":"2004-04-16 20:00:00","gmt_time_end":"2004-04-16 05:00:00","gmt_time_end_last":"2004-04-16 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":""}},"61779":{"#nid":"61779","#data":{"type":"event","title":"Stochastics Seminar :: Dynamic Scheduling in Stochastic Processing Networks","body":[{"value":"\u003Cp\u003EWe consider a class of stochastic processing networks which are capable of modeling semiconductor wafer fabrication facilities, networks of data switches, and large scale call centers.\n\u003C\/p\u003E\n\u003Cp\u003EAssume the networks satisfy a so-called resource pooling condition. We prove a maximum pressure policy asymptotically minimizes the workload processes in heavy traffic. A key to the proof is to show the network processes exhibit state space collapse.\u003Cbr \/\u003E\n(joint with Jim Dai)\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Dynamic Scheduling in Stochastic Processing Networks","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Dynamic Scheduling in Stochastic Processing Networks"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-20T05:00:00-04:00","event_time_end":"2004-10-20T01:00:00-04:00","event_time_end_last":"2004-10-20T01:00:00-04:00","gmt_time_start":"2004-10-20 09:00:00","gmt_time_end":"2004-10-20 05:00:00","gmt_time_end_last":"2004-10-20 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":""}},"61798":{"#nid":"61798","#data":{"type":"event","title":"Statistics seminar:: SELC : Sequential Elimination of Level Combinations by Means of Modified Genetic Algorithms","body":[{"value":"\u003Cp\u003ETo search for an optimal design in a large search space, Wu, Mao, Ma\u003Cbr \/\u003E\n(1990) suggested the SEL-method to find an optimal setting. Genetic\u003Cbr \/\u003E\nalgorithms (GA) can be used to improve upon this method. To make the\u003Cbr \/\u003E\nsearch procedure more efficient, new ideas of forbidden array and weighted\u003Cbr \/\u003E\nmutation are introduced. Relaxing the condition of orthogonality, GA is\u003Cbr \/\u003E\nable to accommodate a variety of design points which allows more\u003Cbr \/\u003E\nflexibility and enhances the chance of getting the best setting in fewer\u003Cbr \/\u003E\nruns, particularly in the presence of interactions. The search procedure\u003Cbr \/\u003E\nis enriched by a Bayesian method for identifying the important main\u003Cbr \/\u003E\neffects and two-factor interactions. Illustration is given with the\u003Cbr \/\u003E\noptimization of three functions, one of which is from Shekel\u0027s family.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics seminar:: SELC : Sequential Elimination of Level Combinations by Means of Modified Genetic Algorithms","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics seminar:: SELC : Sequential Elimination of Level Combinations by Means of Modified Genetic Algorithms"}],"uid":"27279","created_gmt":"2010-10-08 11:39:08","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-22T13:00:00-04:00","event_time_end":"2004-04-22T01:00:00-04:00","event_time_end_last":"2004-04-22T01:00:00-04:00","gmt_time_start":"2004-04-22 17:00:00","gmt_time_end":"2004-04-22 05:00:00","gmt_time_end_last":"2004-04-22 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":""}},"61761":{"#nid":"61761","#data":{"type":"event","title":"Statistics Seminar:: Geometric Isomorphism and Minimum Aberration for Factorial Designs with Quantitative Factors","body":[{"value":"\u003Cp\u003EFactorial designs have broad applications in agriculture, engineering and scientific studies. In constructing and studying properties of factorial designs, traditional design theory treats all factors as nominal. However, this is not appropriate for experiments that involve quantitative factors. For designs with quantitative factors, level permutation of one or more factors in a design matrix could result in different geometric structures, and, thus, different design properties. In this paper indicator functions are introduced to represent factorial designs. A polynomial form of indicator functions is used to characterize the geometric structure of those designs. Geometric isomorphism is defined for classifying designs with quantitative factors. Based on indicator functions, a new aberration criteria is proposed and some minimum aberration designs are presented. (This talk is based on a joint work with Kenny Q. Ye, Albert Einstein College of Medicine)\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar:: Geometric Isomorphism and Minimum Aberration for Factorial Designs with Quantitative Factors","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar:: Geometric Isomorphism and Minimum Aberration for Factorial Designs with Quantitative Factors"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-20T14:00:00-04:00","event_time_end":"2004-10-20T01:00:00-04:00","event_time_end_last":"2004-10-20T01:00:00-04:00","gmt_time_start":"2004-10-20 18:00:00","gmt_time_end":"2004-10-20 05:00:00","gmt_time_end_last":"2004-10-20 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":""}},"61795":{"#nid":"61795","#data":{"type":"event","title":"Natural Systems Seminar","body":"","field_subtitle":"","field_summary":[{"value":"Natural Systems Seminar","format":"limited_html"}],"field_summary_sentence":[{"value":"Natural Systems Seminar"}],"uid":"27279","created_gmt":"2010-10-08 11:39:08","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-04-30T12:00:00-04:00","event_time_end":"2004-04-30T01:00:00-04:00","event_time_end_last":"2004-04-30T01:00:00-04:00","gmt_time_start":"2004-04-30 16:00:00","gmt_time_end":"2004-04-30 05:00:00","gmt_time_end_last":"2004-04-30 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":""}},"61763":{"#nid":"61763","#data":{"type":"event","title":"Emergency Room Overcrowding: An OR Analysis","body":[{"value":"\u003Cp\u003ESince 9\/11, emergency rooms have come under closer scrutiny as the question of hospitals\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Emergency Room Overcrowding: An OR Analysis","format":"limited_html"}],"field_summary_sentence":[{"value":"Emergency Room Overcrowding: An OR Analysis"}],"uid":"27279","created_gmt":"2010-10-08 11:39:03","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-21T12:00:00-04:00","event_time_end":"2004-10-21T01:00:00-04:00","event_time_end_last":"2004-10-21T01:00:00-04:00","gmt_time_start":"2004-10-21 16:00:00","gmt_time_end":"2004-10-21 05:00:00","gmt_time_end_last":"2004-10-21 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":""}},"61786":{"#nid":"61786","#data":{"type":"event","title":"Statistics Seminar :: Enterprise Risk Management: A New Discipline That Calls For Research Innovations","body":[{"value":"\u003Cp\u003EDrawing from his academic\/industry experience in risk management, Dr. Wang will introduce this new emerging discipline of ERM. He will start with a rather local view of statistical pricing theory and risk aggregation analytics, and then zoom out to the big picture of enterprise risks. He will discuss why ERM requires multidisciplinary collaborations and fresh looks of the theoretical foundation of risk. It will be an interesting mix of cutting-edge risk theories and common risk issues that everyone can relate to. The speaker wants to inspire young research minds to enter this new fertile field and produce highly relevant research.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar :: Enterprise Risk Management: A New Discipline That Calls For Research Innovations","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar :: Enterprise Risk Management: A New Discipline That Calls For Research Innovations"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-10-28T13:00:00-04:00","event_time_end":"2004-10-28T01:00:00-04:00","event_time_end_last":"2004-10-28T01:00:00-04:00","gmt_time_start":"2004-10-28 17:00:00","gmt_time_end":"2004-10-28 05:00:00","gmt_time_end_last":"2004-10-28 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":""}},"61778":{"#nid":"61778","#data":{"type":"event","title":"Stochastics Seminar :: Logical Control of Sequential Resource Allocation Systems","body":[{"value":"\u003Cp\u003ESequential resource allocation systems (RAS) constitute a pertinent modeling abstraction for the operational dynamics of a broad range of contemporary technological applications, including production systems, material handling and railway \/ monorail systems, e-commerce and other service-related processes, and even computational environments like those emerging in internet-based computing. In all these environments, a set of concurrently executing processes contest for the sequential exclusive acquisition of a finite set of re-usable resources that are necessary to support the execution of their various processing stages. The resulting resource allocation process must be controlled for (i) operational efficiency, a requirement giving rise to scheduling problems in the context of these environments, but also, for (ii) logical correctness and inherent consistency, a requirement addressed by an emerging logical control theory for these systems. The effective logical control of the aforementioned applications becomes an even more important problem as these environments migrate to extensively automated operational modes.\n\u003C\/p\u003E\n\u003Cp\u003EThis talk will survey the state-of-the-art in RAS logical control. More specifically, the first part of the talk will provide a general description of the problem and a formal characterization of it in the Discrete Event Systems (Ramadge \u0026amp; Wonham\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Stochastics Seminar :: Logical Control of Sequential Resource Allocation Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"Stochastics Seminar :: Logical Control of Sequential Resource Allocation Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:39:05","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-03T03:00:00-05:00","event_time_end":"2004-11-02T23:00:00-05:00","event_time_end_last":"2004-11-02T23:00:00-05:00","gmt_time_start":"2004-11-03 08:00:00","gmt_time_end":"2004-11-03 04:00:00","gmt_time_end_last":"2004-11-03 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":""}},"61794":{"#nid":"61794","#data":{"type":"event","title":"Distributed Simulation for Decision Support in Semiconductor Supply Chains","body":[{"value":"\u003Cp\u003EPeter Lendermann is a Senior Scientist in the Production and Logistics Planning Group at Singapore Institute of Manufacturing Technology (SIMTech). Previously he was a Managing Consultant with agiplan in Germany where his focus was on the areas of supply chain management and production planning. He also worked as a Research Associate at the European Laboratory for Particle Physics CERN in Geneva (Switzerland) and Nagoya University (Japan). He obtained a Diploma in Physics from the University of Munich (Germany), a Doctorate in Applied Physics from Humboldt-University in Berlin (Germany) and a Master in International Economics and Management from Bocconi-University in Milan (Italy). His research interests include discrete event simulation as well as modeling and analysis of manufacturing and logistics systems.\n\u003C\/p\u003E\n\u003Cp\u003EModeling and simulation is widely regarded as one of the breakthrough technologies that will accelerate progress in addressing the grand challenges facing manufacturing in the next decade. In this seminar, new research challenges arising from the increased criticality of inter-factory dependencies in today\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Distributed Simulation for Decision Support in Semiconductor Supply Chains","format":"limited_html"}],"field_summary_sentence":[{"value":"Distributed Simulation for Decision Support in Semiconductor Supply Chains"}],"uid":"27279","created_gmt":"2010-10-08 11:39:08","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-06-08T12:00:00-04:00","event_time_end":"2004-06-08T01:00:00-04:00","event_time_end_last":"2004-06-08T01:00:00-04:00","gmt_time_start":"2004-06-08 16:00:00","gmt_time_end":"2004-06-08 05:00:00","gmt_time_end_last":"2004-06-08 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":""}},"61757":{"#nid":"61757","#data":{"type":"event","title":"Statistics Seminar :: De-noising signals of unknown local structure","body":[{"value":"\u003Cp\u003EWe focus on recovering a non-parametric signal observed in Gaussian noise along an equidistant $d$-dimensional grid. Typical nonparametric regression estimates are aimed at recovering smooth signals $f$ and utilize the fact that such an $f$ is locally well approximated by an algebraic polynomial; thus, we can recover $f$ at a point from nearby observations as if $f$ were a polynomial, which is an easy-to-estimate entity. The research to be outlined in the talk is motivated by the simple observation that polynomials are not the only ``easy to estimate\u0027\u0027 entities; the latter property is shared, e.g., by products of polynomials and harmonic oscillations. However, the traditional nonparametric techniques fail to recover signals of the latter type, except for the case when the frequencies of oscillations are known in advance or are low;  the reason is that a good estimate of a product of algebraic polynomial and a harmonic oscillation requires a priori knowledge of the frequencies. In the talk, we present a kind of universal nonparametric estimate, based on Linear Programming, with the following property: whenever the signal to be estimated admits an ``easy to estimate\u0027\u0027 local approximation $g$ (one which can be recovered well by an {sl unknown in advance} convolution filter), as it is the case for smooth signals, products of smooth signals and harmonic oscillations, etc., our estimate recovers the signal nearly as well as a hypothetical estimate utilizing this ``existing in the nature\u0027\u0027  (and unknown in reality) filter. We demonstrate also that the family of ``easy to estimate\u0027\u0027 signals is pretty rich, specifically, contains a number of important generic families of signals and is closed with respect to basic operations like modulation $g(x)mapsto g(x)cos(omega^Tx+phi)$ and summation.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar :: De-noising signals of unknown local structure","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar :: De-noising signals of unknown local structure"}],"uid":"27279","created_gmt":"2010-10-08 11:39:02","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-03T12:00:00-05:00","event_time_end":"2004-11-02T23:00:00-05:00","event_time_end_last":"2004-11-02T23:00:00-05:00","gmt_time_start":"2004-11-03 17:00:00","gmt_time_end":"2004-11-03 04:00:00","gmt_time_end_last":"2004-11-03 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":""}},"61791":{"#nid":"61791","#data":{"type":"event","title":"ISyE Graduate Student Pizza Party","body":[{"value":"\u003Cp\u003EPlease join us in welcoming the new graduate students to ISyE.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Graduate Student Pizza Party","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Graduate Student Pizza Party"}],"uid":"27279","created_gmt":"2010-10-08 11:39:07","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-08-13T11:15:00-04:00","event_time_end":"2004-08-13T01:00:00-04:00","event_time_end_last":"2004-08-13T01:00:00-04:00","gmt_time_start":"2004-08-13 15:15:00","gmt_time_end":"2004-08-13 05:00:00","gmt_time_end_last":"2004-08-13 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":""}},"61754":{"#nid":"61754","#data":{"type":"event","title":"Thesis Defense :: Reverse Logistics and Environmental Considerations in Equipment Leasing and Asset Management","body":[{"value":"\u003Cp\u003EToday many business enterprises employ capital assets in the form of electronic equipment (e.g., personal computers, workstations and\u003Cbr \/\u003E\nperipherals) in large quantities. In the face of rapid equipment changes, current tax laws and disposal challenges, leasing or procurement contracts with take-back considerations are attractive for electronic equipment.\n\u003C\/p\u003E\n\u003Cp\u003EFor a large electronic equipment leasing company, optimal management of assets supported by good logistics decisions is crucial and may provide a significant competitive advantage. The leasing company tries to maximize operating profits through key decisions associated with the length of leases, efficient utilization of logistics facilities for material flow to and from customer sites, and equipment reuse, refurbishment and disposal actions.\n\u003C\/p\u003E\n\u003Cp\u003EIn this research, a mixed integer linear programming (MILP) model is developed to facilitate better decisions from the perspective of an electronic equipment leasing company. A case study with representative industry data validates the approach and demonstrates the utility of the model in answering key research questions. Next, important problem uncertainties are identified and prioritized. The effects of these key uncertainties on optimal lease length and product flow decisions are examined in detail via an extended case study. It is also shown how the leasing company can make near-robust leasing decisions in the face of these uncertainties.\n\u003C\/p\u003E\n\u003Cp\u003EThe computational research results also have implications for policy formulation on electronic waste. The important insights include an understanding of the potential impacts and expected effectiveness of alternative environmental legislation in different geographic areas, and the imposition of negative externalities on other policy realms as a result of this non-uniform approach. Therefore, this research contributes new models and understanding to the intersection of the fields of reverse logistics and equipment replacement, and provides valuable insights to both business asset managers and environmental policy makers.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thesis Defense :: Reverse Logistics and Environmental Considerations in Equipment Leasing and Asset Management","format":"limited_html"}],"field_summary_sentence":[{"value":"Thesis Defense :: Reverse Logistics and Environmental Considerations in Equipment Leasing and Asset Management"}],"uid":"27279","created_gmt":"2010-10-08 11:39:02","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-03T14:30:00-05:00","event_time_end":"2004-11-02T23:00:00-05:00","event_time_end_last":"2004-11-02T23:00:00-05:00","gmt_time_start":"2004-11-03 19:30:00","gmt_time_end":"2004-11-03 04:00:00","gmt_time_end_last":"2004-11-03 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":""}},"61789":{"#nid":"61789","#data":{"type":"event","title":"STATISTICS SEMINAR :: Independent Particle Filters","body":[{"value":"\u003Cp\u003ESequential Monte Carlo methods, especially the particle filter (PF) and its various modifications, have been used effectively in dealing with stochastic dynamic systems.  The standard PF samples the current state through the underlying state dynamics, then uses current observation to evaluate the samples\u0027 importance weight. However, in many applications the current observation provides significant information about the current state while the state dynamics is weak. Sampling using the current observation in this case often produces efficient samples. In this paper, we formulate the framework for a new variant of the particle filter, the independent particle filter (IPF). It generates exchangeable samples of the current state from a sampling distribution that is conditionally independent of the previous states, a special case of which uses only the current observation. Each sample can then be matched with multiple samples of the previous states for evaluating the importance weight. We present some theoretical results showing that this strategy improves efficiency of estimation as well as reduces resampling frequency in many situations. We also discuss some extensions of the IPF. Several synthetic examples and one real example are used to demonstrate the effectiveness of the method.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STATISTICS SEMINAR :: Independent Particle Filters","format":"limited_html"}],"field_summary_sentence":[{"value":"STATISTICS SEMINAR :: Independent Particle Filters"}],"uid":"27279","created_gmt":"2010-10-08 11:39:06","changed_gmt":"2016-10-08 01:52:51","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-08-24T13:00:00-04:00","event_time_end":"2004-08-24T01:00:00-04:00","event_time_end_last":"2004-08-24T01:00:00-04:00","gmt_time_start":"2004-08-24 17:00:00","gmt_time_end":"2004-08-24 05:00:00","gmt_time_end_last":"2004-08-24 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":""}},"61753":{"#nid":"61753","#data":{"type":"event","title":"THESIS DEFENSE :: Ranking and Selection Procedures for Bernoulli and Multinomial Data","body":[{"value":"\u003Cp\u003ERanking and Selection procedures have been designed to select the best\u003Cbr \/\u003E\nsystem from a number of alternatives, where the best system is defined by\u003Cbr \/\u003E\nthe given problem. The primary focus of this thesis is on experiments where\u003Cbr \/\u003E\nthe data are from simulated systems. In simulation ranking and selection\u003Cbr \/\u003E\nprocedures, four classes of comparison problems are typically encountered.\u003Cbr \/\u003E\nWe focus on two of them: Bernoulli and multinomial selection.  Therefore, we\u003Cbr \/\u003E\nwish to select the best system from a number of simulated alternatives where\u003Cbr \/\u003E\nthe best system is defined as either the one with the largest probability of\u003Cbr \/\u003E\nsuccess (Bernoulli selection) or the one with the greatest probability of\u003Cbr \/\u003E\nbeing the best performer (multinomial selection). We focus on procedures\u003Cbr \/\u003E\nthat are sequential and use an indifference-zone formulation wherein the\u003Cbr \/\u003E\nuser specifies the smallest practical difference he wishes to detect between\u003Cbr \/\u003E\nthe best system and other contenders.\n\u003C\/p\u003E\n\u003Cp\u003EWe apply fully sequential procedures due to Kim and Nelson (2004) to\u003Cbr \/\u003E\nBernoulli data for terminating simulations, employing common random numbers.\u003Cbr \/\u003E\nWe find that significant savings in total observations can be realized for\u003Cbr \/\u003E\ntwo to five systems when we wish to detect small differences between\u003Cbr \/\u003E\ncompeting systems. We also study the multinomial selection problem. We offer\u003Cbr \/\u003E\na Monte Carlo simulation of the Bechhofer and Kulkarni (1984) MBK\u003Cbr \/\u003E\nmultinomial procedure and provide extended tables of results. In addition,\u003Cbr \/\u003E\nwe introduce a multi-factor extension of the MBK procedure. This procedure\u003Cbr \/\u003E\nallows for multiple independent factors of interest to be tested\u003Cbr \/\u003E\nsimultaneously from one data source (e.g., one person will answer multiple\u003Cbr \/\u003E\nindependent surveys) with significant savings in total observations compared\u003Cbr \/\u003E\nto the factors being tested in independent experiments (each survey is run\u003Cbr \/\u003E\nwith separate focus groups and results are combined after the experiment).\u003Cbr \/\u003E\nAnother multi-factor multinomial procedure is also introduced, which is an\u003Cbr \/\u003E\nextension to the MBG procedure due to Bechhofer and Goldsman (1985, 1986).\u003Cbr \/\u003E\nThis procedure performs better that any other procedure to date for the\u003Cbr \/\u003E\nmulti-factor multinomial selection problem and should always be used\u003Cbr \/\u003E\nwhenever table values for the truncation point are available.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Ranking and Selection Procedures for Bernoulli and Multinomial Data","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Ranking and Selection Procedures for Bernoulli and Multinomial Data"}],"uid":"27279","created_gmt":"2010-10-08 11:39:02","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-05T09:00:00-05:00","event_time_end":"2004-11-04T23:00:00-05:00","event_time_end_last":"2004-11-04T23:00:00-05:00","gmt_time_start":"2004-11-05 14:00:00","gmt_time_end":"2004-11-05 04:00:00","gmt_time_end_last":"2004-11-05 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":""}},"61750":{"#nid":"61750","#data":{"type":"event","title":"SEMINAR :: Examining the Cost-Effectiveness of Pharmacogenomic Strategies to Individualize Care for Cancer Patients","body":[{"value":"\u003Cp\u003EThe broad availability of genetic information arising from the Human Genome Project promises to bring new modalities for testing and treatment to oncology. Advances in cancer cell biology and genetics now permit the detection of individuals with hereditary predisposition  to disease, the development of gene-based drug therapies,  and the individualization of drug therapy based on a  patient\u0027s genetics. Pharmacogenomics refers to a  spectrum of approaches to explore the association of  genetic variation at any locus with drug activity or  toxicity. In contrast to most drugs outside of oncology,  anticancer drugs are often customized based on individual  patient characteristics, such as a patient\u0027s body surface  area. Despite this individualized dosing, there is great  heterogeneity in the ways that patients respond to medications,  in terms of both toxicity and treatment efficacy. Thus, drug  dosage and selection are adjusted modified once therapy has  begun based on the severity of ensuing drug toxicities and  efficacy. Genetic polymorphisms in drug-metabolizing enzymes,  transporters, and receptors, and in cancer cells may explain  some of the inter-individual differences in the efficacy  and toxicity of chemotherapy, and suggest the need for  individualized therapy based on genetic information.  However, the economic implications of pharmacogenomic  testing prior to administering chemotherapy remain unclear.  We have investigated the general principles underlying the  potential for pharmacogenomic treatment strategies to become  cost-effective, and are examining the cost-effectiveness  particular pharmacogenetic and pharmacogenomic interventions.  I will discuss a Markov model that examines the cost-effectiveness  of screening children with acute lymphoblastic leukemia (ALL)  for thiopurine methyltransferase (TPMT) deficiency prior to  instituting 2.5 years of maintenance therapy with 6-mercaptopurine  (6-MP). Children with TPMT deficiency (0.3% US population)  treated with 6-MP experience severe bone marrow suppression  and may die, but a simple, prospective dose reduction can  prevent this effect. The model was used to compare the costs  and quality-adjusted survival for children managed with  pharmacogenomic testing versus those receiving  conventionally-dosed 6-MP. I will also describe studies  to assess the incremental cost-effectiveness of DPD  genotyping prior to initiation of 5-FU therapy and UGT1A1  genotyping prior to initiation of irinotecan therapy for  patients with colorectal cancer, and related work in  oncology informatics to link utility-based measures of  outcome to an existing database containing clinical,  administrative, pharmacy, and genetic data. This enhanced  database will facilitate future cost-utility studies of pharmacogenomics. \n\u003C\/p\u003E\n\u003Cp\u003EReferences  Bala MV, Zarkin GA. Pharmacogenomics and the evolution of  healthcare : is it time for cost-effectiveness analysis at the individual level? Pharmacoeconomics. 2004;22(8):495-8.  Flowers CR, Veenstra D. The role of cost-effectiveness  analysis in the era of pharmacogenomics. Pharmacoeconomics.  2004;22(8):481-93.  Danzon P, Towse A. The economics of gene therapy and of  pharmacogenetics. Value Health. 2002 Jan-Feb;5(1):5-13. \n\u003C\/p\u003E\n\u003Cp\u003EDr. Christopher Flowers, MD, is an Assistant Professor in Hematology and Oncology and the Clinical Director for Oncology Informatics Program at the Winship Cancer Institute, Emory University School of Medicine\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"SEMINAR :: Examining the Cost-Effectiveness of Pharmacogenomic Strategies to Individualize Care for Cancer Patients","format":"limited_html"}],"field_summary_sentence":[{"value":"SEMINAR :: Examining the Cost-Effectiveness of Pharmacogenomic Strategies to Individualize Care for Cancer Patients"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-11T14:00:00-05:00","event_time_end":"2004-11-10T23:00:00-05:00","event_time_end_last":"2004-11-10T23:00:00-05:00","gmt_time_start":"2004-11-11 19:00:00","gmt_time_end":"2004-11-11 04:00:00","gmt_time_end_last":"2004-11-11 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":""}},"61744":{"#nid":"61744","#data":{"type":"event","title":"Collaborative Procurement and Due Date Management in Supply Chains","body":[{"value":"\u003Cp\u003EIn this thesis we analyze the procurement process of buyers and\u003Cbr \/\u003E\nsupply decisions of manufacturers. Companies are looking for ways\u003Cbr \/\u003E\nto decrease their procurement costs, which account for a large\u003Cbr \/\u003E\npercentage of the supply chain costs. We study the effects of\u003Cbr \/\u003E\ndemand aggregation and collaborative procurement on buyers\u0027\u003Cbr \/\u003E\nprofitability. First, we make a high-level analysis and consider a\u003Cbr \/\u003E\nmarket with multiple buyers and suppliers where multi-unit\u003Cbr \/\u003E\ntransactions for multiple items take place. The procurement costs\u003Cbr \/\u003E\nare effected by economies of scale in the suppliers\u0027 production\u003Cbr \/\u003E\ncosts and by economies of scope in transportation. We design buyer\u003Cbr \/\u003E\nstrategies that model different collaboration levels and assess\u003Cbr \/\u003E\nthe role of collaboration under varying market conditions. Next,\u003Cbr \/\u003E\nwe analyze the procurement process on a lower level and identify\u003Cbr \/\u003E\nbenefits of inter-firm collaboration among buyers who are\u003Cbr \/\u003E\npotential competitors in the end market. We adopt a game-theoretic\u003Cbr \/\u003E\napproach to explore the economics of the basic mechanism\u003Cbr \/\u003E\nunderlying collaborative procurement, and determine the conditions\u003Cbr \/\u003E\nthat makes it beneficial to the participants.\n\u003C\/p\u003E\n\u003Cp\u003EBesides low procurement costs, important considerations in\u003Cbr \/\u003E\nsupplier selection are responsiveness and the reliability of the\u003Cbr \/\u003E\nsuppliers in meeting demand. Hence, manufacturers face the\u003Cbr \/\u003E\npressure for quoting short and reliable lead-times. We cover\u003Cbr \/\u003E\nseveral aspects of the manufacturer\u0027s problem, such as quoting\u003Cbr \/\u003E\nreliable due-dates based on the workload status in the system,\u003Cbr \/\u003E\nmaximizing profit considering the lateness cost incurred due to\u003Cbr \/\u003E\nlate deliveries, and deciding on the level of inventory to\u003Cbr \/\u003E\nincrease responsiveness. We employ a model where demand arrival\u003Cbr \/\u003E\nand manufacturing processes are stochastic, and obtain insights on\u003Cbr \/\u003E\nthe optimal due-date policy and on the optimal inventory level.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Collaborative Procurement and Due Date Management in Supply Chains","format":"limited_html"}],"field_summary_sentence":[{"value":"Collaborative Procurement and Due Date Management in Supply Chains"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-16T09:00:00-05:00","event_time_end":"2004-11-15T23:00:00-05:00","event_time_end_last":"2004-11-15T23:00:00-05:00","gmt_time_start":"2004-11-16 14:00:00","gmt_time_end":"2004-11-16 04:00:00","gmt_time_end_last":"2004-11-16 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":""}},"61749":{"#nid":"61749","#data":{"type":"event","title":"Operational control of stochastic processing networks","body":[{"value":"\u003Cp\u003EA processing network is a system that takes materials of various kinds as inputs, and uses processing resources to produce other materials as outputs.  A wide range of real world, complex systems can be represented within this conceptual framework, including semiconductor wafer fabrication facilities, networks of data switches, and large-scale call centers.  In a manufacturing context, the processing network paradigm is flexible enough to accommodate machine-operator interactions, material handling equipment, machine breakdown, and assembly-disassembly operations.  It can be used to model call centers with cross-trained operators, to model input-queued data switches, and to model congestion-based routing of road traffic.  Key performance measures of a stochastic processing network include throughput (the rate at which jobs or materials flow through the system) and cycle time (the total amount of time that inputs spend in the network). Elements of an operational policy may include input control, sequencing, routing, and decisions related to batching and setups; the choice of such a policy can dramatically affect network performance.\n\u003C\/p\u003E\n\u003Cp\u003EIn this talk, it will first be shown that even in simple networks, commonly used operational policies like first-in-first-out sequencing may perform badly, failing to achieve even \u0022throughput optimality.\u0022 We then present two families policies, called discrete-proportional-processor-sharing and maximum pressure policies, that are always throughput optimal, regardless of the processing network\u0027s topology or parameter values.  These policies have other attractive features as well, including distributed implementation that uses only local or semi-local congestion information.  A simulation study has been undertaken that evaluates these policies in a wafer fabrication setting, using SEMATECH data sets.  The results of that study will be discussed, along with other attractive theoretical properties of the two policy families.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Operational control of stochastic processing networks","format":"limited_html"}],"field_summary_sentence":[{"value":"Operational control of stochastic processing networks"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-16T10:00:00-05:00","event_time_end":"2004-11-15T23:00:00-05:00","event_time_end_last":"2004-11-15T23:00:00-05:00","gmt_time_start":"2004-11-16 15:00:00","gmt_time_end":"2004-11-16 04:00:00","gmt_time_end_last":"2004-11-16 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":""}},"61746":{"#nid":"61746","#data":{"type":"event","title":"Estimation Techniques for Nonlinear Functions of the Steady-State Mean in Computer Simulation","body":[{"value":"\u003Cp\u003EA simulation study consists of  several steps such as data collection, coding and verification, model validation, experimental design, output data analysis, and implementation. Our research will concentrate on output data analysis. In this field, many researchers have studied how to construct confidence intervals for the mean u of a stationary stochastic process. However, the estimation of the value of a nonlinear function f(u) has not received a lot of attention in the simulation literature. Towards this goal, a batch-means-based methodology was proposed by Munoz and Glynn (1997). Their approach did not consider consistent estimators for the variance of the point estimator for f(u). This thesis, however, will consider consistent variance estimation techniques to construct confidence intervals for f(u).  Specifically, we use methods based on the techniques of nonoverlapping batch means (NBM), standardized time series (STS), and a combination of both. Our approaches are tested on moving average, autoregressive, and M\/M\/1 queueing processes. The results show that our new confidence interval estimators (CIEs) perform as well as or better than the CIEs based on the method of Munoz and Glynn in terms of coverage, the mean of the CI half-width, and the variance of the CI half-width.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Estimation Techniques for Nonlinear Functions of the Steady-State Mean in Computer Simulation","format":"limited_html"}],"field_summary_sentence":[{"value":"Estimation Techniques for Nonlinear Functions of the Steady-State Mean in Computer Simulation"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-16T12:30:00-05:00","event_time_end":"2004-11-15T23:00:00-05:00","event_time_end_last":"2004-11-15T23:00:00-05:00","gmt_time_start":"2004-11-16 17:30:00","gmt_time_end":"2004-11-16 04:00:00","gmt_time_end_last":"2004-11-16 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":""}},"61747":{"#nid":"61747","#data":{"type":"event","title":"Energy Research:  Opportunities and Challenges","body":[{"value":"\u003Cp\u003EThe purpose of this talk will be to present a broad overview of the Energy Quantitative Research effort at Citadel Investment Group, and highlight some challenges facing the practical application of finance theory to\u003Cbr \/\u003E\nenergy investing.  Energy markets present a unique opportunity for\u003Cbr \/\u003E\nfinancial analysis, since the underlying commodity economics cause many traditional finance assumptions to be violated.  Instead, practical research solutions must address the fundamental economics and account for the shortcomings of established equity and fixed income theory.  During\u003Cbr \/\u003E\nthis talk, we will attempt to highlight some of these issues and provide a discussion framework for application of textbook theory to the trading desk reality.  Further, this talk will present a brief description of the\u003Cbr \/\u003E\noverall hedge fund environment in which a research professional must\u003Cbr \/\u003E\noperate.\n\u003C\/p\u003E\n\u003Cp\u003EFounded in 1990, Citadel Investment Group is a world leader in alternative investments, with a team of over 800 people in five offices worldwide.  Our research philosophy is to apply a systematic process driven approach\u003Cbr \/\u003E\nto investing in order to advance the reliability and repeatability of high risk adjusted returns. \n\u003C\/p\u003E\n\u003Cp\u003ESpeaker Bio:\n\u003C\/p\u003E\n\u003Cp\u003EDr. Byrns is the Director of Energy Research at Citadel Investment Group in Chicago, IL.  He received his PhD in Engineering, (GA Tech 1991), as\u003Cbr \/\u003E\nwell as a MS in Economics (GA Tech 1991), a MSE in Aerospace Engineering (GA Tech 1988) and a BSE in Mechanical and Aerospace Engineering (Princeton 1985).  He has been actively involved in commodity research for almost 8 years, holding various staff and management positions at Williams\u003Cbr \/\u003E\nEnergy, Merchant Energy Group of the Americas, and Koch Industries.  Prior to entering the commodity field, he worked as a consultant in Washington\u003Cbr \/\u003E\nD.C.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Energy Research:  Opportunities and Challenges","format":"limited_html"}],"field_summary_sentence":[{"value":"Energy Research:  Opportunities and Challenges"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-17T10:00:00-05:00","event_time_end":"2004-11-16T23:00:00-05:00","event_time_end_last":"2004-11-16T23:00:00-05:00","gmt_time_start":"2004-11-17 15:00:00","gmt_time_end":"2004-11-17 04:00:00","gmt_time_end_last":"2004-11-17 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":""}},"61751":{"#nid":"61751","#data":{"type":"event","title":"Statistics Seminar:: Overlapping Overlapping Variance Estimators for Simulations","body":[{"value":"\u003Cp\u003EWe introduce new estimators for the variance parameter of a steady-state simulation output\u003Cbr \/\u003E\nprocess.  The new estimators are linear combinations of estimators formed from overlapped\u003Cbr \/\u003E\nversions of standardized time series and\/or batch means estimators using different batch sizes.\u003Cbr \/\u003E\nThese \u0022overlapping overlapping\u0022 estimators have both lower bias and variance than their original\u003Cbr \/\u003E\noverlapping (without linear combinations) counterparts.  The work is joint with Tuba Aktaran.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Statistics Seminar:: Overlapping Overlapping Variance Estimators for Simulations","format":"limited_html"}],"field_summary_sentence":[{"value":"Statistics Seminar:: Overlapping Overlapping Variance Estimators for Simulations"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-17T12:00:00-05:00","event_time_end":"2004-11-16T23:00:00-05:00","event_time_end_last":"2004-11-16T23:00:00-05:00","gmt_time_start":"2004-11-17 17:00:00","gmt_time_end":"2004-11-17 04:00:00","gmt_time_end_last":"2004-11-17 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":""}},"61745":{"#nid":"61745","#data":{"type":"event","title":"Pricing Path-Dependent Derivative Securities Using Monte Carlo Simulation \u0026 Intra-Market Statistical Trading Model","body":[{"value":"\u003Cp\u003EThis thesis is composed of two parts. The first parts deals with a\u003Cbr \/\u003E\ntechnique for pricing American-style contingent options. The\u003Cbr \/\u003E\nsecond part details a statistical arbitrage model using\u003Cbr \/\u003E\nstatistical process control approaches.\n\u003C\/p\u003E\n\u003Cp\u003EWe propose a novel simulation approach for pricing American-style\u003Cbr \/\u003E\ncontingent claims. We develop an adaptive policy search algorithm\u003Cbr \/\u003E\nfor obtaining the optimal policy in exercising an American-style\u003Cbr \/\u003E\noption. The option price is first obtained by estimating the\u003Cbr \/\u003E\noptimal option exercising policy and then evaluating the option\u003Cbr \/\u003E\nwith the estimated policy through simulation. Both high-biased and\u003Cbr \/\u003E\nlow-biased estimators of the option price are obtained. We show\u003Cbr \/\u003E\nthat the proposed algorithm leads to convergence to the true\u003Cbr \/\u003E\noptimal policy with probability one. This policy search algorithm\u003Cbr \/\u003E\nrequires little knowledge about the structure of the optimal\u003Cbr \/\u003E\npolicy and can be naturally implemented using parallel computing\u003Cbr \/\u003E\nmethods. As illustrative examples, computational results on\u003Cbr \/\u003E\npricing regular American options and American-Asian options are\u003Cbr \/\u003E\nreported and they indicate that our algorithm is faster than\u003Cbr \/\u003E\ncertain alternative American option pricing algorithms reported in\u003Cbr \/\u003E\nthe literature.\n\u003C\/p\u003E\n\u003Cp\u003ESecondly, we investigate arbitrage opportunities arising from\u003Cbr \/\u003E\ncontinuous monitoring of the price difference of highly correlated\u003Cbr \/\u003E\nassets. By differentiating between two assets, we can separate\u003Cbr \/\u003E\ncommon macroeconomic factors that influence the asset price\u003Cbr \/\u003E\nmovements from an idiosyncratic condition that can be monitored\u003Cbr \/\u003E\nvery closely by itself. Since price movements are in line with\u003Cbr \/\u003E\nmacroeconomic conditions such as interest rates and economic\u003Cbr \/\u003E\ncycles, we can easily see out of the normal behaviors on the price\u003Cbr \/\u003E\nchanges. We apply a statistical process control approach for\u003Cbr \/\u003E\nmonitoring time series with the serially correlated data. We use\u003Cbr \/\u003E\nvarious variance estimators to set up and establish trading\u003Cbr \/\u003E\nstrategy thresholds.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Pricing Path-Dependent Derivative Securities Using Monte Carlo Simulation \u0026amp; Intra-Market Statistical Trading Model","format":"limited_html"}],"field_summary_sentence":[{"value":"Pricing Path-Dependent Derivative Securities Using Monte Carlo Simulation \u0026 Intra-Market Statistical Trading Model"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-17T14:30:00-05:00","event_time_end":"2004-11-16T23:00:00-05:00","event_time_end_last":"2004-11-16T23:00:00-05:00","gmt_time_start":"2004-11-17 19:30:00","gmt_time_end":"2004-11-17 04:00:00","gmt_time_end_last":"2004-11-17 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":""}},"61748":{"#nid":"61748","#data":{"type":"event","title":"Evaluating the Capability and Cost of a Mass Vaccination Clinic via Computer Simulation","body":[{"value":"\u003Cp\u003EDr. Michael L. Washington earned his B.S. in Industrial and Systems\u003Cbr \/\u003E\nEngineering from the University of Florida, and his M.S. and Ph.D. in\u003Cbr \/\u003E\nIndustrial Engineering from the University of South Florida.  He\u003Cbr \/\u003E\ncurrently works for the Centers for Disease Control and Prevention,\u003Cbr \/\u003E\nNational Immunization Program in Atlanta, GA.  Dr. Washington has worked\u003Cbr \/\u003E\non simulation projects related to urban and rural public health clinics,\u003Cbr \/\u003E\nemergency rooms, and warehouses.  He also developed simulations of mass\u003Cbr \/\u003E\nvaccination\/prophylaxis clinic to help local official plan for massive\u003Cbr \/\u003E\nbio-terrorist attacks.  Additional past projects include cost analysis\u003Cbr \/\u003E\nof extra-vaccinating children, cost analysis of vaccine wastage, vaccine\u003Cbr \/\u003E\nforecasting, and complex survey analyses of vaccine acceptance.  Dr.\u003Cbr \/\u003E\nWashington was a consultant for the World Health Organization (WHO), and\u003Cbr \/\u003E\nGhana\u0027s Ministry of Health.  While in Ghana, he provided consultation\u003Cbr \/\u003E\nexpertise in data management, statistics, and geographical informational\u003Cbr \/\u003E\nsystem concerning about seven-vaccine preventable disease.  He has also\u003Cbr \/\u003E\nconsulted with WHO South East Asia Regional Office and the National\u003Cbr \/\u003E\nPolio Surveillance Unit (NPSU), New Delhi, India to evaluate\u003Cbr \/\u003E\nsurveillance software, and to assist in training vaccine preventable\u003Cbr \/\u003E\ndisease surveillance, data management, and mapping.  He visited 5 out of\u003Cbr \/\u003E\n7 regions in India to evaluate NPSU\u0027s data managers skills, tools, and\u003Cbr \/\u003E\ncapabilities. Because of Dr. Washington\u0027s accomplishments, the National\u003Cbr \/\u003E\nEngineering Week selected him as one of the top 16 young engineers in\u003Cbr \/\u003E\nthe nation in 2003, and he was profile in USA Today and other media\u003Cbr \/\u003E\noutlets throughout the year. Recently, he was nominated for a Service to\u003Cbr \/\u003E\nAmerica Medal for his Homeland Security efforts in creating a mass\u003Cbr \/\u003E\nsmallpox vaccinations computer model to help local officials prepare for\u003Cbr \/\u003E\na bio-terrorist attack.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Evaluating the Capability and Cost of a Mass Vaccination Clinic via Computer Simulation","format":"limited_html"}],"field_summary_sentence":[{"value":"Evaluating the Capability and Cost of a Mass Vaccination Clinic via Computer Simulation"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-22T13:00:00-05:00","event_time_end":"2004-11-21T23:00:00-05:00","event_time_end_last":"2004-11-21T23:00:00-05:00","gmt_time_start":"2004-11-22 18:00:00","gmt_time_end":"2004-11-22 04:00:00","gmt_time_end_last":"2004-11-22 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":""}},"61743":{"#nid":"61743","#data":{"type":"event","title":"ISyE Cookie Decorating Party","body":[{"value":"\u003Cp\u003EThe School of Industrial and Systems Engineering is hosting a Cookie Decorating Party, Friday, December 3.  The party will be held on the first floor (Student Lounge) of the ISyE Main Bldg., from 11:30am - 1:30pm.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"ISyE Cookie Decorating Party","format":"limited_html"}],"field_summary_sentence":[{"value":"ISyE Cookie Decorating Party"}],"uid":"27279","created_gmt":"2010-10-08 11:39:01","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-12-03T10:30:00-05:00","event_time_end":"2004-12-02T23:00:00-05:00","event_time_end_last":"2004-12-02T23:00:00-05:00","gmt_time_start":"2004-12-03 15:30:00","gmt_time_end":"2004-12-03 04:00:00","gmt_time_end_last":"2004-12-03 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":""}},"61741":{"#nid":"61741","#data":{"type":"event","title":"Minimizing Multi-zone Orders in the Correlated Storage Assignment Problem","body":[{"value":"\u003Cp\u003EIn the correlated storage assignment problem, products are assigned to\u003Cbr \/\u003E\nstorage\/pick zones in a warehouse to minimize picking effort.  Unlike\u003Cbr \/\u003E\nprevious work which has focused on minimizing travel distance, our\u003Cbr \/\u003E\nobjective is to minimize the number of zones that must be visited to fill\u003Cbr \/\u003E\nthe orders.  This problem is NP-Complete so heuristic methods are developed\u003Cbr \/\u003E\nto find solutions.  We present a Lagrangian relaxation approach as well as\u003Cbr \/\u003E\nseveral other construction heuristics.  Improvement methods discussed\u003Cbr \/\u003E\ninclude 2-exchanges and cyclic exchanges.  We also consider problem\u003Cbr \/\u003E\nvariations such as different product sizes, stock splitting, and\u003Cbr \/\u003E\nrewarehousing.  Computational results are presented for problems containing\u003Cbr \/\u003E\nup to 10664 products and 40 zones.  In particular, our results show that\u003Cbr \/\u003E\ncyclic exchanges are very powerful and can be used to obtain solutions 15%\u003Cbr \/\u003E\nbetter than those from using popularity, a standard approach.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Minimizing Multi-zone Orders in the Correlated Storage Assignment Problem","format":"limited_html"}],"field_summary_sentence":[{"value":"Minimizing Multi-zone Orders in the Correlated Storage Assignment Problem"}],"uid":"27279","created_gmt":"2010-10-08 11:39:00","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-12-03T12:00:00-05:00","event_time_end":"2004-12-02T23:00:00-05:00","event_time_end_last":"2004-12-02T23:00:00-05:00","gmt_time_start":"2004-12-03 17:00:00","gmt_time_end":"2004-12-03 04:00:00","gmt_time_end_last":"2004-12-03 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":""}},"61742":{"#nid":"61742","#data":{"type":"event","title":"Data Mining in Tree-Based Models and Large-Scale Contingency Tables","body":[{"value":"\u003Cp\u003EDuring the last decade, data mining has received great attention\u003Cbr \/\u003E\nfrom various fields. This thesis investigates data mining problems\u003Cbr \/\u003E\nin tree-based models and large-scale contingency tables. The first\u003Cbr \/\u003E\nhalf of the thesis pertains to the tree-based models for the\u003Cbr \/\u003E\nclassification problem, which have been very popular in various\u003Cbr \/\u003E\nfields because of their interpretability and flexibility. Tree\u003Cbr \/\u003E\nmodeling involves two major steps: tree growing and tree pruning.\u003Cbr \/\u003E\nTree growing searches over the whole data set to find the\u003Cbr \/\u003E\nsplitting point that leads to the greatest improvement in a\u003Cbr \/\u003E\nspecified score function. Once the trees are grown, tree pruning\u003Cbr \/\u003E\npursues the right sized tree that provides the best estimate of\u003Cbr \/\u003E\nerror when the tree is applied to unseen data. In this thesis, we\u003Cbr \/\u003E\npropose a novel algorithm for tree pruning, called frontier-based\u003Cbr \/\u003E\ntree pruning (FBP). The new method has an order of computational\u003Cbr \/\u003E\ncomplexity comparable to cost-complexity pruning (CCP). Regarding\u003Cbr \/\u003E\ntree pruning, FBP provides a full spectrum of information: namely,\u003Cbr \/\u003E\n(1) given the value of the penalization parameter $lambda$, it\u003Cbr \/\u003E\ngives the decision tree specified by the complexity-penalization\u003Cbr \/\u003E\napproach; (2) given the size of a decision tree, it provides the\u003Cbr \/\u003E\nrange of the penalization parameter $lambda$, within which the\u003Cbr \/\u003E\ncomplexity-penalization approach renders this tree size; and (3)\u003Cbr \/\u003E\nit finds the tree sizes that are {it inadmissible},\u003Cbr \/\u003E\n--- so regardless of what the value of the penalty parameter is, the\u003Cbr \/\u003E\nresulting tree, based on a complexity-penalization framework, will\u003Cbr \/\u003E\nnever have these sizes. Simulations on real data sets reveal\u003Cbr \/\u003E\nsurprising results: in the complexity-penalization approach, most\u003Cbr \/\u003E\nof the tree sizes are inadmissible. FBP facilitates a more\u003Cbr \/\u003E\nfaithful implementation of cross validation (CV), which is favored\u003Cbr \/\u003E\nby simulations. As an extension of the FBP algorithm, we study how\u003Cbr \/\u003E\nCV performs in tree-based models. Considering the abundant results\u003Cbr \/\u003E\navailable on applying CV to regression models, there is little\u003Cbr \/\u003E\nresearch on the effects of CV in classification models due to\u003Cbr \/\u003E\ntheir nonlinear structure. The main purpose of this study is to\u003Cbr \/\u003E\nexplore the behavior of CV in tree-based models. We report\u003Cbr \/\u003E\nsimulation studies that compare a cross-validated tree classifier\u003Cbr \/\u003E\nwith an oracle classifier that is ideally derived on the knowledge\u003Cbr \/\u003E\nof underlying distributions. The main observation of this study\u003Cbr \/\u003E\nindicates that the difference between the testing and training\u003Cbr \/\u003E\nerror from a cross-validated tree classifier and an oracle\u003Cbr \/\u003E\nclassifier empirically has a linear regression relation. The\u003Cbr \/\u003E\n``slope\u0027\u0027 and the ``$R^2$\u0027\u0027 of regression models are employed as\u003Cbr \/\u003E\nthe performance measures of a cross-validated tree classifier.\u003Cbr \/\u003E\nMoreover, simulation reveals that the performance of a\u003Cbr \/\u003E\ncross-validated tree classifier depends on the geometry, the\u003Cbr \/\u003E\nparameters of the underlying distributions, and the sample sizes.\u003Cbr \/\u003E\nSuch observations can explain and justify the behavior of CV in\u003Cbr \/\u003E\ntree-based models.\n\u003C\/p\u003E\n\u003Cp\u003EThe second half of the thesis presents multiple testing in\u003Cbr \/\u003E\nlarge-scale contingency tables and its application to pattern\u003Cbr \/\u003E\nrecognition of protein structures. One of the most common test\u003Cbr \/\u003E\nprocedures using two-way contingency tables is the test of\u003Cbr \/\u003E\nindependence between two categorizations. Current significant\u003Cbr \/\u003E\ntests such as $chi^2$ or likelihood ratio tests provide overall\u003Cbr \/\u003E\nindependency but bring limited information about the nature of the\u003Cbr \/\u003E\nassociation in the contingency tables. The main purpose of this\u003Cbr \/\u003E\nstudy is to develop a follow-up method to $chi^2$ or likelihood\u003Cbr \/\u003E\nratio tests that identifies the significantly associated\u003Cbr \/\u003E\nindividual cells in the contingency table. We propose a framework\u003Cbr \/\u003E\nof multiple testing procedures for testing independence of the\u003Cbr \/\u003E\ncell categories in contingency tables. In the simulation study, we\u003Cbr \/\u003E\ncompare the power, type I error, and false discovery rate of five\u003Cbr \/\u003E\ndifferent testing procedures in the contingency table. We observe\u003Cbr \/\u003E\nthat no single procedure is superior for every scenario examined.\u003Cbr \/\u003E\nIn addition, we record the relationships among the proportion of\u003Cbr \/\u003E\ntrue null hypotheses, power, type I error, and false discovery\u003Cbr \/\u003E\nrate. Finally, we employ the proposed method to identify the\u003Cbr \/\u003E\npatterns of pair-wise associations between amino acids involved in\u003Cbr \/\u003E\n$beta$-sheet bridges of proteins. We identify a number of amino\u003Cbr \/\u003E\nacid pairs that exhibit either strong or weak association. These\u003Cbr \/\u003E\npatterns provide useful information for algorithms that predict\u003Cbr \/\u003E\nsecondary and tertiary structures of proteins.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Data Mining in Tree-Based Models and Large-Scale Contingency Tables","format":"limited_html"}],"field_summary_sentence":[{"value":"Data Mining in Tree-Based Models and Large-Scale Contingency Tables"}],"uid":"27279","created_gmt":"2010-10-08 11:39:00","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-12-03T13:30:00-05:00","event_time_end":"2004-12-02T23:00:00-05:00","event_time_end_last":"2004-12-02T23:00:00-05:00","gmt_time_start":"2004-12-03 18:30:00","gmt_time_end":"2004-12-03 04:00:00","gmt_time_end_last":"2004-12-03 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":""}},"61740":{"#nid":"61740","#data":{"type":"event","title":"STOCHASTICS SEMINAR :: Dynamic Due Date Quotation for Base-Stock Inventory Systems","body":[{"value":"\u003Cp\u003EFaced by squeezed profit margins due to competition, firms are\u003Cbr \/\u003E\nlooking for ways to differentiate themselves, such as by being\u003Cbr \/\u003E\nresponsive in fulfilling demand while keeping the delivery promises.\u003Cbr \/\u003E\nWe look at the dynamic due date quotation problem under base-stock\u003Cbr \/\u003E\ninventory holding, where the demand is lead-time sensitive and unmet\u003Cbr \/\u003E\ndue dates are penalized. We examine several facets of the due date\u003Cbr \/\u003E\nquotation problem, including quoting reliable due-dates based on workload\u003Cbr \/\u003E\nstatus, maximizing profit considering the lateness cost incurred\u003Cbr \/\u003E\ndue to late deliveries, and deciding on the level of inventory. We develop\u003Cbr \/\u003E\na structural analysis of the optimal due-date quotation policy under\u003Cbr \/\u003E\na given base-stock level and we show an optimal policy exists and\u003Cbr \/\u003E\nis monotone in the number of customers. We also obtain insights on\u003Cbr \/\u003E\nthe optimal base-stock level. We conduct experiments to identify when is\u003Cbr \/\u003E\nit more profitable to operate in a pure make-to-order environment,\u003Cbr \/\u003E\nand when is it more profitable to keep inventory; how much inventory\u003Cbr \/\u003E\nshould be kept; and how utilization levels affect the profits.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"STOCHASTICS SEMINAR :: Dynamic Due Date Quotation for Base-Stock Inventory Systems","format":"limited_html"}],"field_summary_sentence":[{"value":"STOCHASTICS SEMINAR :: Dynamic Due Date Quotation for Base-Stock Inventory Systems"}],"uid":"27279","created_gmt":"2010-10-08 11:39:00","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-12-08T15:00:00-05:00","event_time_end":"2004-12-07T23:00:00-05:00","event_time_end_last":"2004-12-07T23:00:00-05:00","gmt_time_start":"2004-12-08 20:00:00","gmt_time_end":"2004-12-08 04:00:00","gmt_time_end_last":"2004-12-08 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":""}},"61752":{"#nid":"61752","#data":{"type":"event","title":"THESIS DEFENSE :: Multivariate Quality Control Using Loss-Scaled Principal Components","body":[{"value":"\u003Cp\u003EQuality control is commonly divided into off-line activities, synonymous\u003Cbr \/\u003E\nwith robust design (RD), and on-line procedures, also known as statistical\u003Cbr \/\u003E\nprocess control (SPC). Most research in both areas of quality control has\u003Cbr \/\u003E\ndealt with single variables. Since most complex systems are multivariate\u003Cbr \/\u003E\nin nature, there is an increasing need for user friendly multivariate\u003Cbr \/\u003E\ntechniques.\n\u003C\/p\u003E\n\u003Cp\u003EThe multivariate quadratic loss function (MQL) is a popular multivariate\u003Cbr \/\u003E\ntechnique in static RD and has occasionally been applied to multivariate\u003Cbr \/\u003E\nSPC. In both areas we integrate the contents of the MQL into specially\u003Cbr \/\u003E\nconstructed principal components called loss-scaled principal components\u003Cbr \/\u003E\n(LSPC). We examine how well a subset of these LSPC approximate the\u003Cbr \/\u003E\nexpected value of MQL and apply them to a RD problem featuring six\u003Cbr \/\u003E\nresponses and eight predictor variables. We also show when\u003Cbr \/\u003E\nLSPCs can quickly detect and accurately diagnose shifts in location and\u003Cbr \/\u003E\ndispersion in multivariate SPC.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"THESIS DEFENSE :: Multivariate Quality Control Using Loss-Scaled Principal Components","format":"limited_html"}],"field_summary_sentence":[{"value":"THESIS DEFENSE :: Multivariate Quality Control Using Loss-Scaled Principal Components"}],"uid":"27279","created_gmt":"2010-10-08 11:39:02","changed_gmt":"2016-10-08 01:52:47","author":"Barbara Christopher","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2004-11-04T10:00:00-05:00","event_time_end":"2004-11-03T23:00:00-05:00","event_time_end_last":"2004-11-03T23:00:00-05:00","gmt_time_start":"2004-11-04 15:00:00","gmt_time_end":"2004-11-04 04:00:00","gmt_time_end_last":"2004-11-04 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":""}}}