1. Prof.‐in‐Charge, Fluid Mechanics and Wind Engrg. Program, and Dir., Fluid Dynamics and Diffusion Lab., Colorado State Univ., Fort Collins, Colo. 80523
2. Prof., Technion, Haifa, Israel; and Visiting Prof., Colorado State Univ., Fort Collins, Colo. 80523
3. Assoc. Prof. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo. 80523
4. Asst. Prof. of Mech. Engrg., Faculty of Engrg. at Shobra, Cairo, Egypt