1. Transportation Engineer, California Dept. of Transportation, Office of Geotechnical Design South-1, 100 South Main St., 11th Floor, Los Angeles, CA 90012; formerly, Ph.D. Student, The Univ. of Kansas, Lawrence, KS 66045-7609.
2. Associate Professor, Dept. of Civil, Environmental, and Architectural Engineering (CEAE), The Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045-7609 (corresponding author).
3. Assistant Professor, Dept. of Civil Engineering, Istanbul Univ., 34320 Avcilar, Istantul, Turkey.