{"72812":{"#nid":"72812","#data":{"type":"event","title":"ARC Colloquium: Howard Karloff: AT\u0026T Labs-Research","body":[{"value":"\u003Cp\u003EAbstract:\u003C\/p\u003E\u003Cp\u003EInternet service providers hope to provide their customers with superior Internet connectivity, but do they always do so? How can an ISP even know what quality of service it\u0027s providing to its customers? To this end, researchers recently proposed a new scheme an ISP could use in order to estimate the packet loss rates experienced by its customers. \u003C\/p\u003E\u003Cp\u003ETo implement the new scheme, one has to approximately solve an interesting NP-Hard optimization problem on the ISP\u0027s network. Specifically, one must choose a small set of network nodes such that from each customer node there are arc-disjoint paths to *two* of the selected nodes. I will discuss recent work, mostly at ATT, attacking this problem and its surprisingly good results, in light of the problem\u0027s provable inapproximability in the worst case.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Disjoint-Path Facility Location: Theory and Practice"}],"uid":"27263","created_gmt":"2011-11-16 11:39:31","changed_gmt":"2016-10-08 01:56:37","author":"Elizabeth Ndongi","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2010-08-18T14:30:00-04:00","event_time_end":"2010-08-18T14:30:00-04:00","event_time_end_last":"2010-08-18T14:30:00-04:00","gmt_time_start":"2010-08-18 18:30:00","gmt_time_end":"2010-08-18 18:30:00","gmt_time_end_last":"2010-08-18 18:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"70263","name":"ARC"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}