1. Lt., U.S. Navy; formerly, Grad. Student, Dept. of Civ. Engrg., Univ. of Delaware, Newark, Del.
2. Visiting Prof., Leichtweiss-Institut fur Wasserbau, der Technische Universitat Braunschweig, Germany, and Prof., Dept. of Civ. Engrg., Univ. of Delaware, Newark, Del.