24G THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1950 



Slepian has been engaged in mathematical research in communication 

 theory, switching theory and theory of noise. Parker Fellow in physics. 

 Harvard University 1949-50. Member of I.R.E,, American Mathemati- 

 cal Society, the American Association for the Advancement of Science 

 and Sigma Xi. 



Milton Sobel, B.S., City College of New York, 1940; M.A., 1946 and 

 Ph.D., 1951, Columbia University; U. S. Census Bureau, Statistician, 

 1940-41; U. S. Army War College, Statistician, 1942-44; Cohunbia Uni- 

 versity, Department of Mathematics, Assistant, 1946-48 and Research 

 Associate 1948-50; Wayne University, Assistant Professor of Mathe- 

 matics, 1950-52; Columbia University, Department of Mathematical 

 Statistics, Visiting Lecturer, 1952; Cornell University, fundamental re- 

 search in mathematical statistics, 1952-54; Bell Telephone Laboratories, 

 1954-. Dr. Sobel is engaged in fundamental research on life testing 

 reliability problems with special application to transistors and is a con- 

 sultant on many Laboratories projects. Member of Institute of Mathe- 

 matical Statistics, American Statistical Association and Sigma Xi. 



Morris Tanenbaum, A.B., Johns Hopkins University, 1949; M.A., 

 Princeton University, 1950; Ph.D. Princeton University, 1952; Bell 

 Telephone Laboratories, 1952-, Dr. Tanenbaum has been concerned 

 with the chemistry and semiconducting properties of intermetallic com- 

 pounds. At present he is exploring the semiconducting properties of 

 silicon and the feasibility of silicon semiconductor devices. Dr. Tanen- 

 baum is a member of the American Chemical Society and American 

 Physical Society. He is also a member of Phi Lambda LTpsilon, Phi Beta 

 Kappa and Sigma Xi. 



Donald E. Thomas, B.S. in E.E., Pennsylvania State College, 1929; 

 M.A., Columbia University, 1932; Bell Telephone Laboratories, 1929- 

 1942, 1946-. His first assignment at the Laboratories was in submarine 

 cable development. Just prior to World War II he became engaged in 

 the development of sea and airborne radar and continued in this work I 

 until he left for military duty in 1942. During World War II he was made ' 

 a member of the Joint and Combined Chiefs of Staff Committees on 

 Radio C-ountermeasures. Later he was a civilian memlior of the Depart-' 

 ment of Defense's Research and Development Board Panel on Electronic 

 Countermeasures. Upon rejoining the Laboratories in 1946, Mr. Thomas 

 was active in the development and installation of the first deep sea re- 

 peatered submarine telephone cable, hctwcen Key West and Havana,' 



