1. Assistant Professor, Dept. of Mechanical Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208.
2. Postdoctoral Fellow, Dept. of Mechanical Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208 (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208.
4. Associate II, Wiss, Janney, Elstner Associates, Inc., 330 Pfingsten Rd., Northbrook, IL 60062.