1. Assistant Professor, Dept. of Civil and Environmental Engineering, Lafayette College, 310 AEC, Easton, PA 18042.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Missouri-Columbia, E2509 Engineering Building East, Columbia, MO 65211-2200.
3. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Missouri-Columbia, E2509 Engineering Building East, Columbia, MO 65211-2200.