1. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208.
2. Associate Professor, Department of Civil and Environmental Engineering, University of South Carolina, 300 Main St., Columbia, SC 29208.
3. Senior Research Geologist, Shell International Exploration & Production, Inc., P.O. Box 481, Houston, TX 77001.