1. Asst. Prof., Dept. of Civ. and Envir. Engrg., 220 Hollister Hall, Cornell Univ., Ithaca, NY 14853.
2. Asst. Prof., Dept. of Civ. Engrg., 238 Harbert Engrg. Ctr., Auburn Univ., Auburn, AL 36849-5337.
3. Prof., Dept. of Civ. Engrg., ECJ Hall, Univ. of Texas at Austin, Austin, TX 78712.