Talks and presentations

See a map of all the places I've given a talk!

Sampling Strategies for Training Machine Learning Emulators of Gravity Wave Parameterizations

November 02, 2022

Invited Presentations, Institute for Mathematical and Statistical Innovation Workshop: Machine Learning for Climate and Weather Applications, Chicago, IL

This talk introduces a sampling strategy designed to overcome set imbalance in high dimensional datasets in regression tasks. In a case study of training emulators of a gravity wave parameterization scheme on a long-tail distributed dataset, we find that this strategy improves the errors at the tail of the distribution except at the extreme end, while maintaining minimal loss of accuracy at the peak of the distribution.

Time Integration of Wave Turbulence Problems

March 17, 2020

Contributed Presentations, Geophysical and Astrophysical Fluid Dynamics Seminar, CU Boulder, Boulder, Colorado

In this talk, Ian Grooms introduced background on wave turbulence, and then I presented my research on methods for time integration of wave turbulence problems using IMEX and exponential integrators. This work led to this paper.

Simulated Half-Precision Implementation of Blocked QR Factorization and Graph Clustering Applications

March 01, 2019

Invited Presentations, Minisymposium: Mitigating Communication Costs Using Variable Precision Computing Techniques @ SIAM Computational Science and Engineering, Spokane, WA

This presentation discussed round off error analysis of linear algebra subroutines used for the Householder QR decomposition, as well as its implementation for use in graph analysis task. Further work on this topic resulted in this paper.