1. Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2314 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.
2. Project Engineer, Air Products; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2314 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.
3. PhD Candidate, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2320 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.