sentences:  In 1930-1931 he studied at the University of Göttingen where he collaborated in the laboratory of Ludwig Prandtl (whose fellow Oscar Carl Gustav Titens previously worked for Westinghouse).From 1932 to 1945 he taught at Harvard University and took part in the organization of the International Congress of Applied Mechanics in Cambridge (Massachusetts) 1938.From 1945 to 1967 he taught dynamics and strength of materials at MIT and became Professor Emeritus upon retirement in 1967.