1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706-1691.
2. Assistant Professor, Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong Univ., 611756, China.
3. Professor, Dept. of Civil and Environmental Engineering, Geological Engineering Program, Univ. of Wisconsin-Madison, Madison, WI 53706-1691.
4. Dean, School of Engineering, Hamilton Endowed Chair in Civil and Environmental Engineering, Univ. of Virginia, Charlottesville, VA 22904-4246.