{ "111344-21826762": { "datetime_modified":"20230831T205016", "datetime_start":"20231201T150000", "datetime_end":"20231201T160000", "has_end_time":1, "date_start":"2023-12-01", "date_end":"2023-12-01", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"AIM Seminar: Intriguing dynamics in a dense cell monolayer", "occurrence_title":"", "combined_title":"AIM Seminar: Intriguing dynamics in a dense cell monolayer: Evgeniy Khain, Oakland University, Department of Physics", "event_subtitle":"Evgeniy Khain, Oakland University, Department of Physics", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"In this talk, we consider an expansion of a dense monolayer of cells: a collective multicellular phenomenon, where cells divide, grow, and maintain contacts with their neighbors. During migration, cells display complex behavior, adjusting both their division rate and their growth after division to the local mechanical environment. Experimental observations show that cells near the edge of the expanding monolayer are larger and move faster than cells deep inside the colony. To explain these observations and describe cell migration patterns, we formulate a spatio-temporal theoretical model for multicellular dynamics in terms of the cell area distribution; the model includes cell growth after division and effective pressure. Numerical simulations of the model predict both the speed of invasion and the width of the outer proliferative rim; these predictions are in a good agreement with experimental observations. Theoretical analysis yields the equation for density of cells and reveals a novel type of propagating front with compact support. The velocity of front propagation (monolayer expansion) is obtained analytically and its dependence on all the relevant parameters is determined.", "occurrence_notes":null, "guid":"111344-21826762@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/111344", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"1084", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Applied Interdisciplinary Mathematics (AIM) Seminar - Department of Mathematics", "group_id":"4882", "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":21826762 } , "108718-21820318": { "datetime_modified":"20231129T102916", "datetime_start":"20231201T150000", "datetime_end":"20231201T170000", "has_end_time":1, "date_start":"2023-12-01", "date_end":"2023-12-01", "time_start":"15:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"Department Colloquium", "occurrence_title":"", "combined_title":"Department Colloquium: Alva Noe (University of California, Berkeley)", "event_subtitle":"Alva Noe (University of California, Berkeley)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Title: Perception as a relationship\r\nAbstract: Perception is harder than it looks. To perceive is to enter into relationships with the things we see. Indeed, for reasons that I will try to articulate, it is to enter into something like a loving relationship with them. The love-like character of perceiving has been been by-and-large ignored by philosophers and cognitive scientists, but acknowledging it allows for new insight into some of the hardest problems about perception that there are. In this talk I will focus on one class of these having to do with perceptual indeterminacy. This talk, which is work in progress, is part of a larger project to explore the ways in which \u201cordinary\u201d perception is ethically and aesthetically demanding. I draw on ideas from earlier work on perception (e.g. Action in Perception, MIT, 2004 and Varieties of Presence, HUP, 2012), as well as on my newest book The Entanglement (published this past summer by Princeton). I hope this talk will be of interest to students and colleagues working in a wide array of different philosophical areas as well as to scholars in different fields.", "occurrence_notes":null, "guid":"108718-21820318@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/108718", "building_id":"1000197", "building_name":"Mason Hall", "campus_maps_id":"540", "room":"2306", "location_name":"Mason Hall", "has_livestream":0, "cost":"", "tags":["Philosophy"], "website":"", "sponsors":[ { "group_name":"Department of Philosophy", "group_id":"3186", "website":"http:\/\/www.lsa.umich.edu\/philosophy" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2023\/06\/event_108718_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2023\/06\/event_108718_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2023\/06\/event_108718_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2023\/06\/event_108718_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2023\/06\/event_108718_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2023\/06\/event_108718_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2023\/06\/event_108718_original-1.png" }, "occurrence_count":1, "first_occurrence":21820318 } , "115284-21834377": { "datetime_modified":"20231116T103655", "datetime_start":"20231201T150000", "datetime_end":"20231201T160000", "has_end_time":1, "date_start":"2023-12-01", "date_end":"2023-12-01", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HET Seminar | On entropy growth in perturbative scattering", "occurrence_title":"", "combined_title":"HET Seminar | On entropy growth in perturbative scattering: Temple He (Caltech)", "event_subtitle":"Temple He (Caltech)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Inspired by the second law of thermodynamics, we study the change in subsystem entropy generated by dynamical unitary evolution of a product state in a bipartite system. Working at leading order in perturbative interactions, we prove that the quantum n-Tsallis entropy of a subsystem never decreases, provided that subsystem is initialized as a statistical mixture of states of equal probability. This is true for any choice of interactions and any initialization of the complementary subsystem. When this condition on the initial state is violated, it is always possible to explicitly construct a \"Maxwell's demon'' process that decreases the subsystem entropy. Remarkably, for the case of particle scattering, the circuit diagrams corresponding to n-Tsallis entropy are the same as the on-shell diagrams that have appeared in the modern scattering amplitudes program, and the entropy growth is intimately related to the nonnegativity of cross-sections.", "occurrence_notes":null, "guid":"115284-21834377@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/115284", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"335", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Lctp Public Lecture","High Energy Theory Seminar"], "website":"", "sponsors":[ { "group_name":"Leinweber Institute for Theoretical Physics", "group_id":"4286", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "website":"" }, { "group_name":"HET Seminars", "group_id":"3806", "website":"" }, { "group_name":"Leinweber Institute for Theoretical Physics Seminars", "group_id":"4311", "website":"" }, { "group_name":"Leinweber Institute for Theoretical Physics High Energy Theory Seminars", "group_id":"4313", "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":21834377 } }