1. Inst., Dept. of Mechanics and Hydraulics, The Univ. of Iowa, and Research Assoc., Iowa Inst. of Hydraulic Research, Iowa City, Iowa.
2. Inst., Dept. of Mechanics and Hydraulics, The Univ. of Iowa, and Research Engr., Iowa Inst. of Hydraulic Research, Iowa City, Iowa; presently Asst. Prof. of Bioengineering, Carnegie-Mellon Univ., Pittsburgh, Pa.