sentences:  Eckart (an Associate Professor) took leave from the University of Chicago to work on the problem, thus beginning his 31-year stay in California.From 1942, he was assistant director of the Division of War Research, and eventually he was director, a position he held until 1946.In 1946, Eckart officially resigned his position at the University of Chicago to become a professor of geophysics at the Scripps Institution of Oceanography of the University of California, San Diego (UCSD), a position he held until 1971.