1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095-1593. E-mail: sjbrandenberg@ucla.edu
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616.
3. Facility Manager, Center for Geotechnical Modeling, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616.