{ "130711-21866562": { "datetime_modified":"20250108T095323", "datetime_start":"20250409T151000", "datetime_end":"20250409T161000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"15:10:00", "time_end":"16:10:00", "time_zone":"America\/Detroit", "event_title":"MIPSE Seminar | RF Plasma Cathodes and Other Research Activities in the Plasma Propulsion Group at NRL", "occurrence_title":"", "combined_title":"MIPSE Seminar | RF Plasma Cathodes and Other Research Activities in the Plasma Propulsion Group at NRL: Dr. Marcel Georgin, U.S. Naval Research Laboratory", "event_subtitle":"Dr. Marcel Georgin, U.S. Naval Research Laboratory", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract:\r\nThis talk discusses recent work on RF plasma cathodes, propellant agnostic electron sources for electric propulsion systems that enable new deep space exploration mission architectures such as in-situ resource utilization. We develop the fundamental theory for these devices and demonstrate its effectiveness at determining I-V characteristics and performance. From our measurements and model, we project thruster performance and discuss the consequences for space exploration. Then we dive into non-ideal behavior that can be exhibited in these cathodes including sheath expansion and mode transitions. The remainder of the discussion will overview other plasma-related research activities in the NRL propulsion group.\r\n\r\nAbout the Speaker: \r\nDr. Marcel Georgin is an Aerospace Engineer at the Naval Research Laboratory in Washington, D.C. He earned his bachelor\u2019s degree in physics from McGill University in Montreal, Canada, and his Ph.D. in applied physics from the University of Michigan where he studied plasma instabilities in electron sources for electric propulsion systems. His research interests are at the intersection of plasma physics and engineering, with a strong focus on space propulsion. He is currently working on a variety of plasma-related topics, including propellant agnostic electron sources, hypersonics environmental simulation, advanced thermionic cathodes, and more.\r\n\r\nThe seminar will be conducted in person and simulcast via Zoom: https:\/\/mipse.umich.edu\/seminars_2425.php#winter2025", "occurrence_notes":null, "guid":"130711-21866562@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/130711", "building_id":"1000448", "building_name":"Electrical Engineering and Computer Science Building", "campus_maps_id":"56", "room":"1003", "location_name":"Electrical Engineering and Computer Science Building", "has_livestream":0, "cost":"", "tags":["In Person","Michigan Engineering","Physics","Plasma","Propulsion","seminar","Talk"], "website":"https:\/\/mipse.umich.edu\/seminars_2425.php", "sponsors":[ { "group_name":"Michigan Institute for Plasma Science and Engineering (MIPSE)", "group_id":"4073", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/01\/event_130711_original-1.jpeg" }, "occurrence_count":1, "first_occurrence":21866562 } , "131099-21867744": { "datetime_modified":"20250331T145415", "datetime_start":"20250409T153000", "datetime_end":"20250409T170000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"15:30:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Algebraic Geometry Seminar: Nontautological Cycles on Moduli Spaces of Smooth Curves", "occurrence_title":"", "combined_title":"Algebraic Geometry Seminar: Nontautological Cycles on Moduli Spaces of Smooth Curves: Emily Clader (San Francisco State University)", "event_subtitle":"Emily Clader (San Francisco State University)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"The cohomology of the moduli space of stable curves has been widely studied, but in general, understanding the full cohomology ring of this space is too much to ask. Instead, one generally settles for studying the tautological ring, a subring of the cohomology that is simultaneously tractable to study and yet rich enough to contain most cohomology classes of geometric interest. The first known example of an algebraic cohomology class that is *not* tautological was discovered by Graber and Pandharipande, in work that was later significantly generalized by van Zelm to produce an infinite family of non-tautological classes on the moduli space of stable curves. A similar study can be undertaken on the moduli space of smooth curves, but in this case, almost no non-tautological classes were previously known. I will report on joint work with V. Arena, S. Canning, R. Haburcak, A. Li, S.C. Mok, and C. Tamborini (from the 2023 AGNES Summer School), in which we produce non-tautological algebraic classes on the moduli space of smooth curves in an infinite family of cases, including on M_g for all g>15.", "occurrence_notes":null, "guid":"131099-21867744@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/131099", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"4096", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Algebraic Geometry Seminar - Department of Mathematics", "group_id":"4880", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21867744 } , "129317-21862443": { "datetime_modified":"20250220T224422", "datetime_start":"20250409T160000", "datetime_end":"20250409T170000", "has_end_time":1, "date_start":"2025-04-09", "date_end":"2025-04-09", "time_start":"16:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Adaptive Optimal Market Making Strategies with Inventory Liquidation Cost", "occurrence_title":"", "combined_title":"Adaptive Optimal Market Making Strategies with Inventory Liquidation Cost: Jose Figureoa-Lopez\/ WashU", "event_subtitle":"Jose Figureoa-Lopez\/ WashU", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"A novel high-frequency market-making approach in discrete time is proposed that admits closed-form solutions. By taking advantage of demand functions that are linear in the quoted bid and ask spreads with random coefficients, we model the variability of the partial filling of limit orders posted in a limit order book (LOB). The most important feature of our optimal placement strategy is that it can react or adapt to the behavior of market orders online. Using LOB data, we train our model and reproduce the anticipated final profit and loss of the optimal strategy on a given testing date using real LOB data. Our adaptive optimal strategies outperform the non-adaptive strategy and those that quote limit orders at a fixed distance from the midprice. We proceed to explore other extensions of the proposed approach.", "occurrence_notes":null, "guid":"129317-21862443@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/129317", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"1360", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Financial\/Actuarial Mathematics Seminar - Department of Mathematics", "group_id":"4890", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21862443 } }