1. Associate, Exponent Inc., 9 Strathmore Rd., Natick, MA 01760 (corresponding author).
2. Senior Research Associate and Lecturer, Dept. of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139.
3. Deputy Group CEO, Arab Center for Engineering Studies, P.O. Box 5504, Amman 11183, Jordan.
4. Senior Geotechnical Engineer, Fugro Middle East (FME), P.O. Box 447, Abu Dhabi, United Arab Emirates.
5. Training with Industry, Dewberry, 8401 Arlington Blvd., Fairfax, VA 22031.