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DTSTAMP:20240412T133752
DTSTART;TZID=America/Detroit:20240422T100000
SUMMARY:Lecture / Discussion:Nick Ellis Dissertation Defense
DESCRIPTION:This dissertation focuses on analytical developments to triple oxygen isotope measurements (Δ′17O) and their potential for new applications in the paleosciences. In this dissertation\, I explore the utility of Δ′17O as a paleoecological tool using the fossil teeth of Early Eocene mammals. Furthermore\, I use these Δ′17O measurements to probe global biological productivity in the Early Eocene.\n\nChapter 2 introduces a new analytical method for making high-precision (< 10 ppm 1σ uncertainty) Δ′17O measurements in an array of diverse Earth materials\, including organics\, sulfates\, phosphates\, nitrates\, carbonates\, silicates\, and waters. The method uses a 3-step process to quantitatively convert sample oxygen to molecular oxygen (O2) for mass spectrometric analysis. Sample oxygen is first converted to oxygen in CO via a high temperature conversion (HTC) furnace (commonly known by the popular Thermo brand “TC/EA”)\, then oxygen in CO is converted to oxygen in water via a Bosch-type methanation reaction\, and finally oxygen in water is converted to O2 by fluorination. In this chapter\, I report the first ever high-precision Δ′17O measurements for organic materials and nitrates along with new measurements for various other standard reference materials.\n\nChapter 3 applies the triple oxygen isotope system to a taxonomically diverse group of mammal teeth from the Early Eocene Willwood Formation of the Bighorn Basin. I use Δ′17O as a tracer for evaporative signals that yield information about the types of water resources each animal used during its life. This chapter offers new insights into the water-use strategies\, dietary preferences\, and habitats of the animals surveyed. I found evidence for semi-aquatic lifestyles in Homogalax and Coryphodon\, while Hyracotherium appeared to be substantially more water independent. Esthonyx and Cantius recorded more variable intermediate Δ′17O values\, potentially suggesting more generalized water-use behaviors in these taxa. \n\nChapter 4 explores the utility of Δ’17O in mammalian teeth to reconstruct biological productivity at the global scale. Here\, I used animal body water models to isolate the Δ′17O signal of respired atmospheric O2 from the fossil mammal teeth sampled in chapter 3. I then leveraged the relationship between global gross primary productivity (GPP) and Δ′17O of atmospheric O2 to reconstruct global GPP. The results from this analysis suggest that global GPP may have been substantially elevated relative to present day\, providing additional context for the state of life during a warm greenhouse world unlike the modern.\n\nThe advances to triple oxygen isotope geochemistry outlined here offer new\, highly versatile methodologies and applications that lay the foundation for routine Δ′17O measurements in a number of new Earth materials. This will fundamentally allow for new investigations into previously underexplored topics in the geosciences and expand our understanding of ancient worlds.
UID:121417-21846523@events.umich.edu
URL:https://events.umich.edu/event/121417
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Dissertation
LOCATION:1100 North University Building - 2540
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20240417T102935
DTSTART;TZID=America/Detroit:20240422T110000
DTEND;TZID=America/Detroit:20240422T120000
SUMMARY:Workshop / Seminar:Determinantal expressions for Ohyama polynomials
DESCRIPTION:The Ohyama polynomials provide algebraic solutions of the D7 case of the Painleve III equation at a particular sequence of parameter values. It is known that many special function solutions of Painleve equations are expressed in terms of tau functions that can be written in the form of determinants\, but until now such a representation for the Ohyama polynomials was not known. Here we present three different determinantal formulae for these polynomials: the first\, in terms of Wronskian determinants related to a Darboux transformation for a Lax pair of KdV type\; and the second\, in terms of Hankel determinants\, which is related to the Toda lattice. The third is for a slightly modified form of the polynomials and is given as a Wronskian of associated Laguerre polynomials.
UID:121530-21846678@events.umich.edu
URL:https://events.umich.edu/event/121530
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics,seminar,Virtual
LOCATION:Off Campus Location
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20240322T160710
DTSTART;TZID=America/Detroit:20240422T110000
DTEND;TZID=America/Detroit:20240422T120000
SUMMARY:Meeting:Drop In Advising with a Newnan Transfer Academic Advisor
DESCRIPTION:Kayla Harteg and Joel Beebe\, transfer advisors in the Newnan Academic Advising Center\, will be offering drop-in academic advising all semester long in the small conference room next to the Transfer Student Center. Check in at the Transfer Student Center when you arrive.\n\nSo\, stop in the TSC for your free coffee and tea and then pop in to get all of your advising questions answered.
UID:120626-21845056@events.umich.edu
URL:https://events.umich.edu/event/120626
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Transfer Students
LOCATION:LSA Building - 1180
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20240417T211515
DTSTART;TZID=America/Detroit:20240422T110000
DTEND;TZID=America/Detroit:20240422T150000
SUMMARY:Social / Informal Gathering:Earth Day Tote Bag Decorating!
DESCRIPTION:Join Michigan Dining at the Shapiro Lobby on Earth Day from 11:00am to 3:00pm for a delightful opportunity to unleash your creativity! \n\nDive into the joy of decorating and painting your very own tote bag - all completely free! Hurry in and join the fun while supplies last!
UID:121568-21846729@events.umich.edu
URL:https://events.umich.edu/event/121568
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Free,Undergraduate Students,Sustainability,nature,Environment,environmental,Health & Wellness,In Person,Michigan Dining
LOCATION:Shapiro Library
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20240422T121503
DTSTART;TZID=America/Detroit:20240422T110000
DTEND;TZID=America/Detroit:20240422T170000
SUMMARY:Exhibition:Impressions: 2024 Stamps Senior Exhibition
DESCRIPTION:Impressions: 2024 Stamps Senior Exhibition features work in a range of media by graduating Stamps BA\, BFA\, and Interarts Performance students at the University of Michigan Stamps School of Art &amp\; Design.\nOpening Reception: Friday\, April 19\, 2024 from 4 - 8 p.m.Screening of Time-Based Work: Friday\, April 19\, 2024 from 6 - 8 p.m.\, Art &amp\; Architecture Auditorium (room 2104)\nExhibition Hours: Open daily Monday - Saturday\, 11 a.m. - 5 p.m. from April 20 through May 4\, 2024. Closed Sundays.
UID:119891-21843779@events.umich.edu
URL:https://events.umich.edu/event/119891
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Art
LOCATION:Off Campus Location
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20240401T124709
DTSTART;TZID=America/Detroit:20240422T110000
DTEND;TZID=America/Detroit:20240422T120000
SUMMARY:Lecture / Discussion:Monday 4/22 @ 11AM  - Marisa Bartolomei\, Ph.D. - DHG Seminar Series - Kahn Auditorium\, BSRB
DESCRIPTION:DEPARTMENT OF HUMAN GENETICS 2023 - 2024 SEMINAR SERIES   \n \n“DNA methylation reprogramming in mammals.”\n \nPresented by: \nMarisa Bartolomei\, Ph.D.\nPerelman Professor of Cell & Developmental Biology\nDirector\, Center for Women’s Health and Reproductive Medicine\nCo-Director\, Epigenetics Institute\nUniversity of Pennsylvania Perelman School of Medicine\n\nMonday\, April 22\, 2024\n11:00 AM – 12:00 PM EST\nKahn Auditorium\, BSRB\n \nHosted by: \nSue Hammoud\, Ph.D.\nAssociate Professor of Human Genetics\nAssociate Professor of Obstetrics and Gynecology\nAssociate Professor of Urology
UID:121015-21845690@events.umich.edu
URL:https://events.umich.edu/event/121015
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:genetics,genome,Free,Faculty,epilepsy,Discussion,Chemistry,cancer,Bsbsigns,Biosciences,Biology,biological science,biological chemistry,biolgical chemistry,basic sciences,Basic Science,Natural Sciences,seminar,Science,research,Reception,Public Policy,Public Health,Postdoctoral Research Fellows,neurological disease,sodium channel,Medicine,Life Science,lecture,Human Genetics\, Genetics\, Neurogenetic Diseases,Human Genetics\, Genetics\, Epidemiology,human genetics,genomics
LOCATION:Taubman Biomedical Science Research Building - Kahn Auditorium, BSRB
CONTACT:
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