Science Seminar Keynote Speaker Talitha Washington Wednesday, March 15, 7:30 pm Frances Niederer Auditorium, Richard Wetherill Visual Arts Center "How Modeling Can Explain Our World." In our ever changing, complex, information-rich world, we increasingly rely on mathematical and statistical modeling to advance our frontiers of knowledge. Even though the Tacoma Narrows Bridge collapsed on July 1, 1940, we did not completely understand the reasons for its collapse until Joseph McKenna Ph.D., presented a nonlinear model in 1999. The relatively recent outbreak of the mosquito-borne Zika virus urgently requires understanding of how it spreads in a society so we can prevent further infections. The burden on law enforcement to keep our society safe can be eased through predictive policing which can create strategies to reduce crime and improve public safety. With models of our world, we can have better bridges, eliminate epidemic diseases, and live in safer communities. Washington is an associate professor of mathematics at Howard University. She is interested in the applications of differential equations to problems in biology and engineering, as well as the development of nonstandard finite difference schemes to numerically solve dynamical systems. She shares her expertise on diversity and mathematics with a wide range of audiences.