{"667247":{"#nid":"667247","#data":{"type":"event","title":"MS Defense by Julia Tepper","body":[{"value":"\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003E\u003Cspan\u003EJulia Tepper\u003C\/span\u003E\u003C\/span\u003E\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cem\u003E\u003Cspan\u003E\u003Cspan\u003EAdvisor: Professor Koki Ho\u003C\/span\u003E\u003C\/span\u003E\u003C\/em\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cem\u003E\u003Cspan\u003E\u003Cspan\u003Ewill defend a master\u2019s thesis entitled,\u003C\/span\u003E\u003C\/span\u003E\u003C\/em\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003E\u003Cspan\u003EOptimization and Modeling of Multimodal Active Debris Removal Using a Time-Expanded Network\u003C\/span\u003E\u003C\/span\u003E\u003C\/strong\u003E\u003Cem\u003E \u003C\/em\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cem\u003EOn\u003C\/em\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003EThursday, April 26 at 2:00 p.m.\u003Cbr \/\u003E\r\nESM 202\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003ETEAMS:\u0026nbsp;\u003C\/strong\u003E\u003Ca href=\u0022https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_ZGUwZjUxYzctMDIxZC00NmQwLTk5ZGYtMDU0NjJkNmQzMWE5%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%22f6ce9931-5f18-45ae-be53-0b81782484e3%22%7d\u0022\u003E\u003Cstrong\u003Ehttps:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_ZGUwZjUxYzctMDIxZC00NmQwLTk5ZGYtMDU0NjJkNmQzMWE5%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%22f6ce9931-5f18-45ae-be53-0b81782484e3%22%7d\u003C\/strong\u003E\u003C\/a\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003E\u003Cspan\u003EAbstract\u003C\/span\u003E\u003C\/span\u003E\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThis paper develops a framework to optimize the concept of operations of an active debris removal (ADR) mission utilizing a time-expanded network. Given the challenging and costly nature of active debris removal, it is desirable to minimize the cost of the mission while maximizing the number of debris collected to determine the most effective and efficient concept of operations. Potentially damaging debris range in size and mass from very small microdebris to much larger debris. Removal of these differing types of debris involves different mission requirements, and it may be desirable to combine the removal of both types of debris into one mission. Solving a traveling salesman problem with variable costs due to the dynamic nature of space debris is a challenging problem that is simplified and aided by the use of a time-expanded network. For each pair of nodes and time steps, the cost to travel from one debris to another is approximated and optimized. The mission is then formulated as a Mixed-Integer Linear Problem. Using this formulation, an optimal mission scenario with a subset of targeted debris can efficiently and accurately be computed from a large set of potential debris to be removed. Several case studies demonstrate the usefulness of this approach, examining missions using a high-thrust engine to stabilize the debris environment by removing at least five pieces of debris over the course of one year.\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EProf. Koki Ho \u2013 School of Aerospace Engineering (advisor)\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EProf. Brian Gunter \u2013 School of Aerospace Engineering\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EProf. E. Glenn Lightsey \u2013 School of Aerospace Engineering\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003E\u003Cspan\u003EOptimization and Modeling of Multimodal Active Debris Removal Using a Time-Expanded Network\u003C\/span\u003E\u003C\/span\u003E\u003C\/strong\u003E\u003Cem\u003E \u003C\/em\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Optimization and Modeling of Multimodal Active Debris Removal Using a Time-Expanded Network "}],"uid":"27707","created_gmt":"2023-04-11 18:04:11","changed_gmt":"2023-04-24 19:23:22","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2023-04-26T14:00:41-04:00","event_time_end":"2023-04-26T16:00:41-04:00","event_time_end_last":"2023-04-26T16:00:41-04:00","gmt_time_start":"2023-04-26 18:00:41","gmt_time_end":"2023-04-26 20:00:41","gmt_time_end_last":"2023-04-26 20:00:41","rrule":null,"timezone":"America\/New_York"},"location":"ESM 202","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"111531","name":"ms defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}