BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//UM//UM*Events//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Detroit
TZURL:http://tzurl.org/zoneinfo/America/Detroit
X-LIC-LOCATION:America/Detroit
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20070311T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20071104T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260131T210747
DTSTART;TZID=America/Detroit:20260205T160000
DTEND;TZID=America/Detroit:20260205T170000
SUMMARY:Workshop / Seminar:Geometry Seminar:  Superrigidity of rich representations
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.
UID:143037-21891970@events.umich.edu
URL:https://events.umich.edu/event/143037
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260112T144521
DTSTART;TZID=America/Detroit:20260205T160000
DTEND;TZID=America/Detroit:20260205T171500
SUMMARY:Workshop / Seminar:When the Ocean Aerosolizes Pollution: Chemistry of the Products We Breathe
DESCRIPTION:Emerging atmospheric particulates—including micro- and nanoplastics\, engineered nanoparticles\, and chemicals used in consumer and industrial products—are 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.\n\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—especially in the presence of salts and photosensitizers—forming higher yields of and more toxic particle-phase transformation products.\n\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.
UID:138410-21882915@events.umich.edu
URL:https://events.umich.edu/event/138410
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Analytical Chemistry,Chemistry,Science
LOCATION:Chemistry Dow Lab - 1640
CONTACT:
END:VEVENT
END:VCALENDAR