1. Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2314 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.
2. Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2320 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.
3. Assistant Professor, Del E. Webb School of Construction, Arizona State Univ., P.O. Box 870204, Tempe, AZ 85287.
4. Naval Officer; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2314 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.