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X-WR-CALDESC:Events for Claremont Center for the Mathematical Sciences
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DTSTART;TZID=America/Los_Angeles:20251020T161500
DTEND;TZID=America/Los_Angeles:20251020T171500
DTSTAMP:20260407T095327
CREATED:20250829T230854Z
LAST-MODIFIED:20250902T231226Z
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SUMMARY:Some New Advances in Similarity-Based Predictive Modeling (Joel A. Dubin\, University of Waterloo)
DESCRIPTION:Abstract: Earlier work has shown that similarity-based predictive models can improve upon predictive performance\, as compared to using the entire training data to help build models\, particular regarding model discrimination for binary responses. My collaborators and I have some updated results to share\, regarding similarity-based modeling for joint consideration of model calibration and discrimination\, as well as for dynamic prediction models. Properties of our methods will be investigated in comprehensive simulation studies\, and we will demonstrate the methods through separate analyses of a publicly-available intensive care unit (ICU) database.
URL:https://colleges.claremont.edu/ccms/event/some-new-advances-in-similarity-based-predictive-modeling-joel-a-dubin-university-of-waterloo/
LOCATION:Emmy Noether Room\, Estella 1021\, Pomona College\,\, 610 N. College Ave.\, Claremont\, CA\, 91711\, United States
CATEGORIES:Applied Math Seminar
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DTSTART;TZID=America/Los_Angeles:20251021T121500
DTEND;TZID=America/Los_Angeles:20251021T131000
DTSTAMP:20260407T095327
CREATED:20250807T222137Z
LAST-MODIFIED:20251007T213217Z
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SUMMARY:Singularities in characteristic p and the Riemann–Hilbert correspondence (Robert Cass\, CMC)
DESCRIPTION:The Riemann–Hilbert correspondence relates algebra to differential equations on complex algebraic varieties. In characteristic p\, there is an analogous correspondence due to Emerton–Kisin and later generalized by Bhatt–Lurie\, where the derivative operator is replaced by the p-th power Frobenius operator. In this talk we will explain a relation between the mod p Riemann–Hilbert correspondence and the study of singularities of algebraic varieties in characteristic p. This talk is mostly about commutative algebra\, and we will introduce concepts such as local cohomology and perverse sheaves along the way. This is joint work with João Lourenço.
URL:https://colleges.claremont.edu/ccms/event/antc-talk-robert-cass-cmc/
LOCATION:Estella 2099
CATEGORIES:Algebra / Number Theory / Combinatorics Seminar
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DTSTART;TZID=America/Los_Angeles:20251021T160000
DTEND;TZID=America/Los_Angeles:20251021T170000
DTSTAMP:20260407T095327
CREATED:20250910T222206Z
LAST-MODIFIED:20251001T223838Z
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SUMMARY:Claremont Topology Seminar: Puttipong Pongtanapaisan (Pitzer College)
DESCRIPTION:We welcome all undergraduate/graduate students and faculty to attend topology seminar! \nSpeaker: Puttipong Pongtanapaisan (Pitzer College) \nTitle: Special Positions of Shapes in Four-Dimensional Space \nAbstract: I will begin by convincing you that four-dimensional space is more familiar than it might first appear. Then\, I will introduce ways in which mathematicians study objects in 4-space. Each visualization method comes with its own advantages and limitations\, as well as a natural measure of complexity that captures how “knotted” a shape can be. Drawing from my work on several projects\, I will explain how these complexity measures connect to other areas of mathematics. For example\, placing surfaces in what we call a rainbow position reveals connections to symplectic geometry.
URL:https://colleges.claremont.edu/ccms/event/puttipong-pongtanapaisan-pitzer-college/
LOCATION:Fletcher 104\, Pitzer College\, 1050 N Mills Ave\, Claremont\, 91711\, United States
CATEGORIES:Topology Seminar
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DTSTART;TZID=America/Los_Angeles:20251024T110000
DTEND;TZID=America/Los_Angeles:20251024T121500
DTSTAMP:20260407T095327
CREATED:20250923T141134Z
LAST-MODIFIED:20251023T215848Z
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SUMMARY:CCMS Colloquium: Braxton Osting (University of Utah)
DESCRIPTION:CCMS Colloquium invites you to a talk by Braxton Osting (University of Utah)\n\n \nTitle: Blood pressure monitoring with biophysics-informed machine learning models\n\n \nAbstract: Measurement of blood pressure (BP) is essential for early diagnosis and management of hypertension\, a condition that 45% of US adults have and a risk factor for development of heart failure\, the leading cause of death in the US. Wearable technologies have the potential to transform BP monitoring by providing continuous assessments of cardiovascular health metrics and guiding clinical management. However\, existing cuffless wearable devices for BP monitoring often rely on methods lacking theoretical foundations\, such as pulse wave analysis or pulse arrival time\, making them vulnerable to physiological and experimental confounders that undermine their accuracy and clinical utility. We developed a smartwatch device with real-time electrical bioimpedance (BioZ) sensing for cuffless hemodynamic monitoring. We elucidate the biophysical relationship between BioZ and BP via a multiscale analytical and computational modeling framework\, and identify physiological\, anatomical\, and experimental parameters that influence the pulsatile BioZ signal at the wrist. A signal-tagged physics-informed neural network incorporating fluid dynamics principles enables calibration-free estimation of BP and radial and axial blood velocity. We successfully tested our approach with healthy individuals at rest and after physical activity including physical and autonomic challenges\, and with patients with hypertension and cardiovascular disease in outpatient and intensive care settings. Our findings demonstrate the feasibility of BioZ technology for cuffless BP and blood velocity monitoring\, addressing critical limitations of existing cuffless technologies.\n \nBio:  Braxton Osting is a Professor in the Department of Mathematics at the University of Utah where he works on mathematical challenges in the natural and applied sciences. He has broad interests in analytical and computational methods for problems in applied mathematics\, especially in optimization\, partial differential equations\, computational geometry\, and machine learning. \nAfter attending the University of Washington for his undergraduate studies\, Braxton earned a Ph.D. in Applied Mathematics at Columbia University. Before moving to Utah\, he was an NSF Postdoctoral Fellow in the Department of Mathematics at the University of California\, Los Angeles. \nIn his free time\, Braxton enjoys biking\, skiing\, running\, hiking\, and generally spending time outdoors. \n 
URL:https://colleges.claremont.edu/ccms/event/ccms-colloquium-selim-esedoglu-university-of-michigan/
LOCATION:Davidson Lecture Hall\, CMC\, 340 E 9th St\, Claremont\, CA\, 91711\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Bahar Acu":MAILTO:Bahar_Acu@pitzer.edu
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