1. Prof. of Hydr. Engrg. and Director, Inst. of Hydromechanics, Univ. of Karlsruhe, Germany; formerly Assoc. Prof., Dept. Mech. and Hydr., and Research Engr., Inst. of Hydr. Research, The Univ. of Iowa, Iowa City, Iowa.
2. Assist. Prof., Dept. Mech. and Hydr., and Research Engr., Inst. of Hydr. Research, The Univ. of Iowa, Iowa City, Iowa.