American mathematican who was a health physicist with the Manhattan Project from 1943 during WW II. Afterwards, he completed an M.S. degree in Mathematics, and joined the Oak Ridge National Laboratory as a research mathematician. He became a recognized expert in pseudo-random number generators. In the 1950s-60s, he was very active in the civil rights movement in Oak Ridge, dedicated to racial equality and spear-headed effort to desegregate a local high school. As an excellent tournament chess player, he was Tennessee State Champion eight times.