1. Grad. Res. Asst., Dept. of Civ. Engrg., City Coll. of New York and Grad. Ctr. of City Univ. of New York/CUNY, New York, NY 10031.
2. Prof., Dept. of Civ. Engrg., City Coll. of New York and Grad. Ctr. of City Univ. of New York/CUNY, New York, NY 10031.