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    "143037-21891970":
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        "datetime_modified":"20260131T210747",
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        "datetime_end":"20260205T170000",
        "has_end_time":1,
        "date_start":"2026-02-05",
        "date_end":"2026-02-05",
        "time_start":"16:00:00",
        "time_end":"17:00:00",
        "time_zone":"America\/Detroit",
        "event_title":"Geometry Seminar:  Superrigidity of rich representations",
        "occurrence_title":"",
        "combined_title":"Geometry Seminar:  Superrigidity of rich representations: Alex Maldague",
        "event_subtitle":"Alex Maldague",
        "event_type":"Workshop \/ Seminar",
        "event_type_id":"21",
        "description":"In this talk, I will introduce the class of geodesically rich representations. These are representations of (real or complex) hyperbolic lattices that preserve a significant amount of the geometric structure of the associated quotient manifold. When the quotient manifold has robust geometric structure, these representations exhibit rigidity phenomena. In particular, a recent superrigidity theorem for rich representations was used to prove that finite-volume hyperbolic manifolds with infinitely many maximal totally geodesic submanifolds are arithmetic (Bader-Fisher-Miller-Stover). I will discuss a new superrigidity theorem for rich representations that efficiently recovers existing results and addresses target groups that were previously inaccessible.",
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        "building_name":"East Hall",
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        "room":"3866",
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        "tags":["Mathematics"],
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                "group_name":"Geometry Seminar - Department of Mathematics",
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    {
        "datetime_modified":"20260112T144521",
        "datetime_start":"20260205T160000",
        "datetime_end":"20260205T171500",
        "has_end_time":1,
        "date_start":"2026-02-05",
        "date_end":"2026-02-05",
        "time_start":"16:00:00",
        "time_end":"17:15:00",
        "time_zone":"America\/Detroit",
        "event_title":"When the Ocean Aerosolizes Pollution: Chemistry of the Products We Breathe",
        "occurrence_title":"",
        "combined_title":"When the Ocean Aerosolizes Pollution: Chemistry of the Products We Breathe: Jonathan \"Nate\" Slade (UC San Diego)",
        "event_subtitle":"Jonathan \"Nate\" Slade (UC San Diego)",
        "event_type":"Workshop \/ Seminar",
        "event_type_id":"21",
        "description":"Emerging atmospheric particulates\u2014including micro- and nanoplastics, engineered nanoparticles, and chemicals used in consumer and industrial products\u2014are increasingly detected in marine environments. My group combines field measurements with laboratory studies to elucidate the emissions, enrichment, molecular composition, and multiphase chemical transformations of these particulates in sea spray aerosol (SSA). We investigate how particle matrix, interfacial composition, and phase state control reaction pathways and kinetics.\r\n\r\nFieldwork along the San Diego coastline reveals elevated concentrations of wastewater-derived contaminants in SSA associated with the Tijuana River, with phthalate esters showing strong and chain-length-dependent enrichment. Complementary aerosol flow-tube and online mass spectrometry experiments probe the photo-initiated and heterogeneous oxidation of representative consumer-product compounds. We find that oxybenzone, triclosan, and bisphenol A undergo accelerated oxidation in SSA mimics\u2014especially in the presence of salts and photosensitizers\u2014forming higher yields of and more toxic particle-phase transformation products.\r\n\r\nTogether, this work demonstrates how marine aerosols act as chemically active microreactors, where multiphase kinetics and physicochemical properties govern the fate and transformation of particulates of emerging concern.",
        "occurrence_notes":null,
                "guid":"138410-21882915@events.umich.edu",
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        "building_name":"Chemistry Dow Lab",
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        "room":"1640",
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        "tags":["Analytical Chemistry","Chemistry","Science"],
        "website":"https:\/\/sites.google.com\/ucsd.edu\/slade-lab\/",
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                "group_name":"Department of Chemistry",
                "group_id":"3761",
                "website":"https:\/\/lsa.umich.edu\/chem"                },             {
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