1. Professor Emeritus, Department of Civil and Environmental Engineering, Arizona State University, P.O. Box 875306, Tempe, AZ 85287-5306;.
2. Research Assistant, Department of Civil and Environmental Engineering, Arizona State University, Tempe, AZ 85287-5306;.
3. Faculty Research Associate, Department of Civil and Environmental Engineering, Arizona State University, Tempe, AZ 85287-5306;.
4. Senior Research Specialist, Geotechnical Consulting and Testing Systems (GCTS), 6103 South Maple Avenue, Ste. #1, Tempe, AZ 85283, Tempe Arizona;.
5. Assistant Professor, Structural Engineering Department, Mansoura University, Egypt,.