1. Director, Iowa Inst. of Hydr. Research, State Univ. of Iowa, Iowa City, Iowa.
2. Head, Dept. of Mechanics and Hydr., State Univ. of Iowa., Iowa City, Iowa.
3. Associate Prof., Pept. of Mechanic and Hydr.; Research Engr., Iowa Inst. of Hydr. Research, State Univ. of Iowa, Iowa City, Iowa.