1. Asst. Prof., Dept. of Civ. Engrg., Rutgers Univ.-The State Univ. of New Jersey, New Brunswick, N.J.
2. Prof., Dept. of Materials Engrg., Univ. of Illinois at Chicago Circle, Chicago, Ill.
3. Assoc. Prof., Dept. of Materials Engrg., Univ. of Illinois at Chicago Circle, Chicago, Ill.