{ "124089-21861275": { "datetime_modified":"20241006T141632", "datetime_start":"20241122T140000", "datetime_end":"20241122T143000", "has_end_time":1, "date_start":"2024-11-22", "date_end":"2024-11-22", "time_start":"14:00:00", "time_end":"14:30:00", "time_zone":"America\/Detroit", "event_title":"Tales of the Maya Skies", "occurrence_title":"", "combined_title":"Tales of the Maya Skies", "event_subtitle":"", "event_type":"Exhibition", "event_type_id":"7", "description":"Tales of the Maya Skies immerses viewers in the wonders of Maya science, cosmology and myth. This beautifully illustrated story takes us back in time to the jungles of Mexico to discover how Maya scholars developed a sophisticated understanding of astronomy, architecture, and mathematics that enabled them to predict solstices, solar eclipses, weather patterns and planetary movements.", "occurrence_notes":null, "guid":"124089-21861275@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/124089", "building_id":"1005169", "building_name":"Museum of Natural History", "campus_maps_id":"646", "room":"", "location_name":"Museum of Natural History", "has_livestream":0, "cost":"", "tags":["Museum","natural history museum","Science","Space"], "website":"", "sponsors":[ { "group_name":"Planetarium & Dome Theater at the Museum of Natural History", "group_id":"3825", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/08\/event_124089_original-1.jpeg" }, "occurrence_count":47, "first_occurrence":21859128 } , "121475-21846587": { "datetime_modified":"20241106T153909", "datetime_start":"20241122T150000", "datetime_end":"20241122T160000", "has_end_time":1, "date_start":"2024-11-22", "date_end":"2024-11-22", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"AIM Seminar \/ MCAIM Colloquium: PDEs and graph-based semi-supervised learning", "occurrence_title":"", "combined_title":"AIM Seminar \/ MCAIM Colloquium: PDEs and graph-based semi-supervised learning: Jeff Calder, University of Minnesota", "event_subtitle":"Jeff Calder, University of Minnesota", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract: Graph-based semi-supervised learning is a field within machine learning that uses both labeled and unlabeled data with an underlying graph structure for classification and regression tasks. In problems where very little labeled data is available, the classical Laplacian regularization gives very poor results. This can be explained through its PDE continuum limit, which is an ill-posed elliptic equation. Much work recently has been focused on designing graph-based learning methods with well-posed continuum limits, including the p-Laplacian, higher order Laplacians, re-weighted Laplacians, and Poisson equations. \r\n\r\nIn this talk, we will survey this literature, and present our recent work on using Poisson equations for semi-supervised learning. We will present theoretical results which establish that learning with Poisson equations is provably well-posed at arbitrarily low label rates, and experimental results showing that it outperforms existing graph-based semi-supervised learning methods on challenging data sets. We will also present some recent work on applications of Poisson learning to graph-based active learning, where the goal is to select a training set with the most informative examples, often in a sequential online setting starting at extremely low label rates.\r\n\r\nEvent will be in-person and on Zoom: https:\/\/umich.zoom.us\/j\/98734707290\r\n\r\nContact: Selim Esedoglu", "occurrence_notes":null, "guid":"121475-21846587@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/121475", "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":"" }, { "group_name":"MCAIM - Department of Mathematics", "group_id":"4897", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_thumb\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2024\/11\/event_121475_original-1.jpeg" }, "occurrence_count":1, "first_occurrence":21846587 } }