Time：15:00, Monday, June 30 2025
Venue：E4-201
Host：Xing Gu, ITS
Speaker：David White, Denison University
Title：Topological and Statistical Approaches to Spatiotemporal Data
Abstract: I will give an overview of time series data (that is, data sampled at different points in time) and spatially autocorrelated data (e.g., home prices, where the price of the house next to yours contains information about the likely price of your house). I’ll then discuss the most common statistical models for such data, including ARIMA models that factor in what the past knows about the present, spectral models based on Fourier analysis, spatially weighted models, and the general linear mixed model for data with both spatial and temporal autocorrelation. I'll illustrate these models with vignettes from my research, on problems related to drug overdose in the USA, then I’ll explain some new research applying topological data analysis (TDA) to model the spatiotemporal spread of overdoses.
