I am a professor in the Department of Computer Science at Virginia Tech. My research interests include theoretical computer science, algorithms, graph theory, computational biology and bioinformatics, computational genomics, complex networks, and computational epidemiology. I completed a Ph.D. in computer science (1985) at the University of North Carolina, Chapel Hill, an M.S. in mathematics (1976) at the University of Chicago, and a B.S. in mathematics (1975) at the University of North Carolina, Chapel Hill. Before joining the faculty at Virginia Tech in 1987, I was an instructor of applied mathematics and member of the Laboratory of Computer Science at MIT. I am a lifetime member of SIAM, a member of the ACM, and a senior member of the IEEE.