1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland, 1163 Glenn Martin Hall, College Park, MD 20742.
2. Staff Systems Engineer, Qualcomm, Inc., 5775 Morehouse Dr., AM-215F, San Diego, CA 92121.
3. Professor & Chair, Dept. of Geological Engineering, and Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706.