1. Associate Professor, Civil and Environmental Engineering Dept., 5731 Boelter Hall, Univ. of California, Los Angeles, CA 90095.
2. Project Engineer, Praad Geotechnical, 5465 South Centinela Ave., Los Angeles, CA 90066.
3. Assistant Research Engineer, Civil and Environmental Engineering Dept., 6679 Boelter Hall, Univ. of California, Los Angeles, CA 90095.
4. Professor, Civil and Environmental Engineering Dept., 440 Davis Hall, Univ. of California, Berkeley, CA 94720.