1. Assistant Professor, School of Civil and Environmental Engineering, 373 Hollister Hall, Cornell Univ., Ithaca, NY 14853-3501.
2. Project Control Engineer, Bechtel Corporation, 5275 Westview Dr., Frederick, MD 21703.
3. Graduate Student, School of Civil and Environmental Engineering, 220 Hollister Hall, Cornell Univ., Ithaca, NY 14853-3501.