1. Lecturer, Dept. of Civ. Engrg., E. Pakistan Univ. of Engrg. and Tech., Dacca, E. Pakistan; formerly, Graduate Research.Asst., M. I. T., Cambridge, Mass.
2. Director, Instit. of Hydraulic Research, Univ. of Iowa, Iowa City, Iowa; formerly, Assoc. Prof. Civ. Engr., Hydrodynamics Laboratory, M. I. T., Cambridge, Mass.