1. Graduate Student Researcher, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, 1 Shields Ave., Davis, CA 95616.
2. Senior Staff Engineer, Jacobs Associates, Seattle, WA 98101.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, 1 Shields Ave., Davis, CA 95616.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, 1 Shields Ave., Davis, CA 95616.