{ "134609-21874582": { "datetime_modified":"20250415T121310", "datetime_start":"20250421T150000", "datetime_end":"20250421T160000", "has_end_time":1, "date_start":"2025-04-21", "date_end":"2025-04-21", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar | Rapid Inference of Galaxy Properties in the Age of Deep and Large-Scale Surveys of the Universe", "occurrence_title":"", "combined_title":"HEP-Astro Seminar | Rapid Inference of Galaxy Properties in the Age of Deep and Large-Scale Surveys of the Universe: Joel Leja (Pennsylvania State University)", "event_subtitle":"Joel Leja (Pennsylvania State University)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"The inference of the physical properties of galaxies at cosmological distance requires modeling a wide range of physics, including e.g. stellar evolution and atmospheres; dust attenuation and re-emission; nebular physics; and AGN emission. Bayesian inference is often used to map the inevitable degeneracies, and the large amount of physics and wide parameter space means these codes are typically not fast. Yet current and near-future surveys of the universe will yield spectra for millions of galaxies and imaging for billions. I will discuss the tactics employed to speed up these codes, ranging from neural net emulators of key physics (photoionization modeling; stellar spectra) to efficient gradient enhanced GPU-accelerated high-dimensional sampling to rapid simulation-based inference. These yield speed-ups of somewhere between 100x and 100,000x, with unavoidable trade-offs in flexibility and accuracy. I will discuss applications of these techniques to model modern astronomical data, including both industrial-scale modeling of galaxy SEDs and newly-possible directions such as spatially resolved galaxy modeling. Finally, time permitting, I will discuss some of the exciting new discoveries made with these techniques in the very distant universe seen by JWST.", "occurrence_notes":null, "guid":"134609-21874582@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134609", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science"], "website":"", "sponsors":[ { "group_name":"HEP - Astro Seminars", "group_id":"3799", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "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":21874582 } , "134351-21874244": { "datetime_modified":"20250325T192650", "datetime_start":"20250421T153000", "datetime_end":"20250421T170000", "has_end_time":1, "date_start":"2025-04-21", "date_end":"2025-04-21", "time_start":"15:30:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"RCGD Seminar Series and Katz-Newcomb Colloquium Series: Mark Brandt", "occurrence_title":"", "combined_title":"RCGD Seminar Series and Katz-Newcomb Colloquium Series: Mark Brandt: (Political) Attitudes are Interdependent", "event_subtitle":"(Political) Attitudes are Interdependent", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Dr. Mark Brandt, Associate Professor of Psychology at Michigan State University, joins us at the University of Michigan April 21, 2025, for a talk co-sponsored by the Research Center for Group Dynamics and the Katz-Newcomb Colloquium Series.\r\n\r\nThe scientific study of attitudes typically treats attitudes individualistically. There are individual attitudes (e.g., preference for burritos) that vary in strength (e.g., central to the self), resistance to change (e.g., unwavering in the face of dietary information), and their relationship with relevant behaviors (e.g., purchasing of burritos). This approach misses a key property of attitudes: Attitudes are interdependent. \r\n\r\nIn this talk, Brandt focuses on recent research from my lab that studies how attitudes are dependent on other attitudes, identities, and values within a political belief system. He presents the findings that (1) central attitudes of a political belief systems are stronger, being more stable overtime and more resistant to change and (2) that attitudes become moralized when they are connected with other moralized attitudes in the belief system. In combination, these findings suggest that the interdependence of attitudes matters for attitude change and moralization. \r\n\r\nThe goal of Mark Brandt's research is to understand the causes and consequences of political, religious, and moral beliefs that can ultimately be leveraged to reduce conflict and promote a more fair, just, and free society. He studies ideological and moral beliefs \u2013 such as political ideology, racism, religious fundamentalism, and moral conviction \u2013 and how they structure attitudes and behaviors, how they become moralized, and why people adopt them in the first place.\r\n\r\nDavid Dunning, organizer of the Katz-Newcomb speaker series in Psychology and an associate of the Research Center for Group Dynamics, hosts. RCGD's winter 2025 seminar series covers a variety of topics in social science, including social cognition, structural racism, romantic relationships, and cognitive health. Check the schedule for updates to this series that will convene on select Mondays at 3:30 at the Institute for Social Research, Room 1430, and for listings to resume this fall.\r\n\r\nAs permissions allow, seminars are later posted to the RCGD YouTube playlist.", "occurrence_notes":null, "guid":"134351-21874244@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134351", "building_id":"1000145", "building_name":"Institute For Social Research", "campus_maps_id":"76", "room":"1430", "location_name":"Institute For Social Research", "has_livestream":0, "cost":"", "tags":["Politics","Psychology","Social Sciences"], "website":"https:\/\/rcgd.isr.umich.edu\/", "sponsors":[ { "group_name":"Research Center for Group Dynamics (RCGD)", "group_id":"4836", "website":"https:\/\/rcgd.isr.umich.edu\/" }, { "group_name":"Institute for Social Research", "group_id":"3285", "website":"http:\/\/isr.umich.edu" }, { "group_name":"Department of Psychology", "group_id":"3615", "website":"http:\/\/www.lsa.umich.edu\/psych\/" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/03\/event_134351_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/03\/event_134351_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/03\/event_134351_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/03\/event_134351_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/03\/event_134351_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/03\/event_134351_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/03\/event_134351_original-1.png" }, "occurrence_count":1, "first_occurrence":21874244 } }