Events
Department of Mathematics and Statistics
Texas Tech University
This is the second and final part of the talk. In this session, we shall discuss how the various notions of open covers, diameters, metric span and metric cover come together into a diagram of interweaving functors. The colimits of these functors are precisely the various definitions of entropy. We shall discuss a theorem about how in such setups, the functors have a common colimit, thus reproving a fundamental result from the theory of Dynamical systems.
Preprint link
Failure time data occur frequently in clinical and epidemiological studies, where the event or failure of interest is known to occur within an interval induced by monitoring. Motivated by the HIV HVTN-703/704 clinical trials, we consider regression analysis of failure time data that are subject to censoring. We study the effects of HIV antibody concentration (subject to missing) over time on censored failure time using a class of stratified semiparametric transformation models, which include the proportional hazards model and the proportional odds model as special cases. We proposed a model estimation procedure using EM and a standard error estimating procedure through weighted bootstrap. We established consistency and asymptotic normality through modern empirical processes. Additionally, we examined the proposed method through extensive simulation studies and applied it to the HVTN-703/704 clinical trials.
Please virtually attend this week's Statistics seminar at 4:00 PM (UT-6) on the 4th via this zoom link
Abstract. This presentation outlines recent developments in advancing multiphase fluid dynamics simulations using Flash-X, with a focus on notable performance improvements resulting from its integration with AMReX. The talk provides an overview of Flash-X’s composable software architecture designed for modeling diverse simulations, including solid-liquid-gas interactions, phase transitions, and chemical transport, and compares its capabilities with those of existing open-source tools and commercial products. Additionally, this presentation outlines computational workflows centered around Flash-X, emphasizing its integration with scientific machine learning models. It identifies potential research directions that leverage Flash-X to establish a robust infrastructure for composability and performance portability in incompressible multiphase flows. The ultimate goal is to apply these advancements to address real-world engineering problems.
When: 4:00 pm (Lubbock's local time is GMT -6)
Where: room MATH 011 (basement)
ZOOM details:
- Choice #1: use this link
Direct Link that embeds meeting and ID and passcode.
- Choice #2: join meeting using this link
Join Meeting, then you will have to input the ID and Passcode by hand:
* Meeting ID: 944 4492 2197
* Passcode: applied
 | Thursday
Mar. 7
6:30 PM
MA 108
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| Mathematics Education
Math Circle
Aaron Tyrrell
Mathematics and Statistics, Texas Tech University
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Math Circle spring poster
abstract 2 PM CST (UT-6)