1. Assistant Professor, Dept. of Civil and Environmental Engineering, 4505 Maryland Pkwy., Box 45-4015, Univ. of Nevada, Las Vegas 89154-4015.
2. Associate Professor, Dept. of Civil and Environmental Engineering and (by courtesy) Computer Science, and Director, Center for Facility Engineering, Stanford Univ., Stanford, CA 94305-4020.
3. Professor and Chair, Dept. of Civil and Environmental Engineering, Terman Engineering Center, Stanford Univ., Stanford, CA 94305-4020.