1. Assistant Professor, Dept. of Technology, Eastern Kentucky Univ., 307 Whalin Technology Complex, 521 Lancaster Ave., Richmond, KY 40475-3102 (corresponding author).
2. Professor, Civil Engineering Dept., Univ. of Kentucky, C151C Raymond Building, Lexington, KY 40506.
3. Associate Professor (Formerly), Statistics Dept., Univ. of Kentucky, Lexington, KY 40506.