1. Project Geotechnical Engineer, Geocomp Corp., 1145 Massachusetts Ave. Boxborough, MA 01719-1408; formerly, Doctoral Student, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 (corresponding author).
2. Associate Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590.
3. Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590.
4. Professor, School of Civil and Environmental Engineering, Cornell Univ., Ithaca, NY 14853-3501.