COLLOQUIA         2014 -- 2015

Colloquia are held on Fridays in Parker Hall, Room 250, from 4:00-4:50 (unless otherwise advised).
Refreshments are served in Parker Hall, Room 244, beginning at 3:30.

 

   

September 19, 2014

Speaker: Dr. Habib Najm, Sandia National Laboratories, Livermore, California

Title: Uncertainty Quantification in Computational Models

Abstract: Models of physical systems typically involve inputs/parameters that are determined from empirical measurements, and therefore exhibit a certain degree of uncertainty. Estimating the propagation of this uncertainty into computational model output predictions is crucial for purposes of model validation, design optimization, and decision support.

Recent years have seen significant developments in probabilistic methods for efficient uncertainty quantification (UQ) in computational models. These methods are grounded in the use of functional representations for random variables. In particular, Polynomial Chaos (PC) expansions have seen significant use in this context. The utility of PC methods has been demonstrated in a range of physical models, including structural mechanics, porous media, fluid dynamics, aeronautics, heat transfer, and chemically reacting flow. While high-dimensionality remains a challenge, great strides have been made in dealing with moderate dimensionality along with non-linearity and oscillatory dynamics.

In this talk, I will give an overview of UQ in computational models. I will cover the two key classes of UQ activities, namely: estimation of uncertain input parameters from empirical data, and forward propagation of parametric uncertainty to model outputs. I will cover the basics of PC UQ methods with examples of their use in both forward and inverse UQ problems.

Faculty host: Xiaoying Han

September 26, 2014



Speaker: Tomas Caraballo, University of Seville, Spain

Title: Random and Non-autonomous Dynamics of Chemostats

Abstract: Click here

Faculty host: Georg Hetzer



October 3, 2014

Speaker: Max Pitz, Mathematical Institute, University of Oxford

Title: TBA

Faculty host: Ziqin Feng



October 10, 2014

Speaker: Frank Uhlig

Topic: Francis Algorithm, the mathematics, uses, and history



October 31, 2014

Speaker: Prof. Jie Shen, Purdue University

Title: TBA

Faculty host: Junshan Lin



MONDAY, NOVEMBER 3, 2014 in honor of Andrew Lelek, who is turning 80

Speaker 1: Prof. Lex Oversteegen, University of Alabama at Birmingham, 3 pm

Speaker 2: Prof. Thelma West, University of Louisiana at Lafayette, 4 pm

Faculty host: Krystyna Kuperberg



November 7, 2014

Speaker: Dr. Kumer Pial Das ('05), Associate Professor of Mathematics, Lamar University (Beaumont, Texas)

Dr. Das is one of three people from the U.S. and Canada to receive the 2013 Mathematical Association of America's (MAA) Henry L. Alder Award for Distinguished Teaching by a Beginning College or University Mathematics Faculty Member.

Title: TBA

Faculty host: Ming Liao



November 14, 2014

Speaker: Dr. Huaihou Chen, University of Florida

Title: TBA

Faculty host: Guanqun Cao



January 30, 2015

Speaker: Guanqun Cao

Title: TBA 



February 6, 2015

Speaker: Professor Ram Mohapatra, University of Central Florida

Title: TBA

Faculty host: Pete Johnson



April 10, 2015

Speaker: Chi-Kwong Li, Ferguson Professor of Mathematics, 
              College of William and Mary 
Editor-in-chief of Linear and Multilinear Algebra, and Operators and Matrices.
              See http://people.wm.edu/~cklixx/

Title: TBA

Faculty host: T.-Y. Tam 

 

September 5, 2014

Speaker: Jim Gleason, Department of Mathematics, University of Alabama, Tuscaloosa

Title: Math Tests: What are we measuring and how well?

Abstract: We will examine and reflect on our goals and objectives for giving math tests and describe how educational research techniques can help us to determine how well we are meeting those goals.

Faculty host: T.-Y. Tam



THURSDAY, August 28, 2014, 2:00 in Parker 328 

Speaker: Saad El-Zanati, Illinois State University (Professor Zanati received his Ph.D. from Auburn in 1991; Dr. Rodger was his advisor.)

Title: On Decomposing Regular Graphs and Multigraphs into Isomorphic Trees and Forests

Abstract: Click here

Faculty host: Chris Rodger

Last updated: 09/17/2014