{ "147781-21901964": { "datetime_modified":"20260415T164254", "datetime_start":"20260420T130000", "datetime_end":"20260420T140000", "has_end_time":1, "date_start":"2026-04-20", "date_end":"2026-04-20", "time_start":"13:00:00", "time_end":"14:00:00", "time_zone":"America\/Detroit", "event_title":"CHPS Seminar | Reconstructing the properties of the protosolar disk using cosmochemistry", "occurrence_title":"", "combined_title":"CHPS Seminar | Reconstructing the properties of the protosolar disk using cosmochemistry: Alessandro Morbidelli (Observatoire de la Cote d'Azur)", "event_subtitle":"Alessandro Morbidelli (Observatoire de la Cote d'Azur)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Observations of protoplanetary disks with ALMA have revealed a large diversity of properties, but also some common tendencies in terms of dust\/gas density and radial extension ratios, as well as the appearance of features like rings and gaps or cavities. It is too late to observe the proto-solar disk, but many of its properties can be inferred from the current distribution of planetesimals and using cosmochemical constraints on the chronology of planetesimal accretion and the isotopic heterogeneity of the disk. I will review the available data, which can be used to reconstruct the proto-solar disk. The view that emerges is that of a quite standard disk of about 90 au in gas radius and 45 au in dust radius, forming planetesimals at two distinct epochs (one of which is very early, while the disk was presumably still in Class-0 or Class-1 stage) and evolving towards a transition disk at the appearance of Jupiter and Saturn. Similarities and differences with the PDS70 disk will be discussed.", "occurrence_notes":null, "guid":"147781-21901964@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/147781", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"411", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Astronomy","Free","Physics","Talk"], "website":"https:\/\/lsa.umich.edu\/physics", "sponsors":[ { "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":21901964 } , "147384-21900952": { "datetime_modified":"20260403T120445", "datetime_start":"20260422T150000", "datetime_end":"20260422T160000", "has_end_time":1, "date_start":"2026-04-22", "date_end":"2026-04-22", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"CHPS Inaugural Lecture | Planet formation and evolution: key processes to understand the diversity of planetary systems", "occurrence_title":"", "combined_title":"CHPS Inaugural Lecture | Planet formation and evolution: key processes to understand the diversity of planetary systems: Alessandro Morbidelli (Observatoire de la Cote d'Azur)", "event_subtitle":"Alessandro Morbidelli (Observatoire de la Cote d'Azur)", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract: The discovery of a large number of extrasolar planets has demonstrated that our own system is not \"typical\". Exo-planetary systems can be very different from our own, and diverse from each other. Understanding this diversity is a major goal of modern planetary science. The formation of planetary systems is not fully understood, but major advances have been obtained in the last 10 years. New concepts have been proposed, such as the streaming instability for the formation of planetesimals and pebble accretion for the formation of protoplanets. It is also now clear that planets forming in the proto-planetary disks have to migrate during their accretion, if their mass exceeds a few times the mass of Mars. Accretion and dynamical evolution are therefore very coupled processes. This leads to complex evolutions, very sensitive to initial conditions and fortuitous events, that are the key to understand the observed diversity of planetary systems. The early formation of Jupiter and its limited migration due to the formation of Saturn are two fundamental ingredients that determined the basic structure of the Solar System. There is also evidence that the vast majority of planetary systems become unstable after the removal of the protoplanetary disk. The effects of this instability are very different depending on the masses of the planets involved. Our Solar System also experienced a global instability, but fortuitously, our giant planets did not develop large orbital eccentricities.\n\nBio: Dr. Morbidelli is one of the world's top experts in the dynamical history of the solar system (as one example, the Nice model of giant planet instabilities as the origin of the late heavy bombardment). He is also an expert in the area of planet formation writ large, with numerous contributions on the origins of planetary systems. He won the Urey Prize from the planetary science division of the American Astronomical Society in 2000, the Grand Prix Mergier-Bourdeix from the Acad\u00e9mie des Sciences in 2009, the CNRS Silver Medal in 2019, and is a member of the Coll\u00e9ge de France.\n\nThe talk will be followed by refreshments and time for discussion until 5:00 p.m.\n\nThe Departments of Physics, Astronomy, CLASP, and Earth & Environmental Science have jointly established a new initiative named the Center for Habitable Planetary Systems (CHPS).", "occurrence_notes":null, "guid":"147384-21900952@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/147384", "building_id":"1005047", "building_name":"Palmer Commons", "campus_maps_id":"188", "room":"Atrium 4, North", "location_name":"Palmer Commons", "has_livestream":0, "cost":"", "tags":["Astronomy","Free","Lecture","Physics"], "website":"https:\/\/lsa.umich.edu\/physics", "sponsors":[ { "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":21900952 } , "147767-21901949": { "datetime_modified":"20260415T141351", "datetime_start":"20260430T120000", "datetime_end":"20260430T130000", "has_end_time":1, "date_start":"2026-04-30", "date_end":"2026-04-30", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"Life After Grad School Seminars | Beyond the Chatbot: Making Agentic AI Useful for Engineering", "occurrence_title":"", "combined_title":"Life After Grad School Seminars | Beyond the Chatbot: Making Agentic AI Useful for Engineering: Kevin Nelson, Founding Engineer at Datum Systems Inc, a San Francisco-based startup specializing in AI agents for engineering design.", "event_subtitle":"Kevin Nelson, Founding Engineer at Datum Systems Inc, a San Francisco-based startup specializing in AI agents for engineering design.", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"The evolution of Large Language Models (LLMs) has shifted from simple text generation to the \"agentic\" paradigm\u2014where AI doesn't just describe solutions but actively executes them. However, for AI to tackle quantitative domains including automotive engineering it requires more than just language; specialized toolkits are needed to navigate complex 3D environments and satisfy rigorous physics constraints. In this talk, I introduce Datum, a San Francisco-based startup building the bridge between agentic AI and physical engineering. I will explore how we enable AI agents to search 3D geometries and automate physics simulations, putting decades of institutional knowledge and computational rigor at every engineer\u2019s fingertips. To conclude, I will share reflections on the current job market and search process, offering a founder's perspective on what it means to build\u2014and find\u2014a career at the frontier of this new technology.\n\nBIO:\nKevin Nelson is a Founding Engineer at Datum Systems Inc, a San Francisco-based startup specializing in AI agents for engineering design.\n\nBefore Datum, Kevin spent 11 years in particle physics research, starting at the College of William and Mary before coming to Michigan for his PhD and postdoctoral research with the ATLAS experiment. His research applied geometric deep learning to beyond the standard model searches in the Higgs sector. Now, at Datum he applies the same techniques to artificial intelligence. When not working on AI, you can usually find him out for a run in the beautiful San Francisco weather.", "occurrence_notes":null, "guid":"147767-21901949@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/147767", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Artificial Intelligence","Life After Graduate School","Physics"], "website":"", "sponsors":[ { "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":21901949 } }