This is a past event.

ME-EM Graduate Seminar Speaker Series

proudly presents

Kathryn Maupin, PhD

Sandia National Laboratories

Abstract

Computational simulation has allowed scientists to explore, observe, and test physical regimes previously thought to be unattainable. Bayesian analysis provides a natural framework for incorporating the uncertainties that undeniably exist in computational modeling. However, the ability to perform quality Bayesian and uncertainty analyses is often limited by the computational expense of first-principles physics models. In the absence of a reliable low fidelity physics model, phenomenological surrogate models can be used to mitigate this expense; however, phenomenological models may not adhere to known physics or properties. Furthermore, the interactions of complex physics in high-fidelity codes lead to dependencies between quantities of interest (QoIs) that are difficult to quantify and capture when individual surrogates are used for each observable. Predicting multiple QoIs with a single surrogate preserves valuable insights regarding the correlated behavior of the target observables and maximizes the information gained from available data. Applications to thermonuclear ignition and hypersonic reentry are discussed.

Bio

Kathryn Maupin is a Senior Member of the Technical Staff at Sandia National Laboratories. Her research focuses on model form error quantification and multi-objective surrogate modeling. Broader research interests include Bayesian methods, model validation, sensitivity analysis, and uncertainty quantification. Kathryn joined Sandia as a postdoc in 2016 and converted to a staff position in 2018. She received her PhD in Computational Sciences, Engineering and Mathematics and her MS in Computational and Applied Mathematics from The University of Texas at Austin after completing her BA in Applied Mathematics at the University of California, San Diego. When she is not working, Kathryn spends her time playing with her two girls and three dogs.

*Sandia National Laboratories is a multi mission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.

Invited by: Susanta Ghosh