1. Assistant Professor, Dept. of Civil & Coastal Engineering, Univ. of Florida, P.O. Box 116580, Gainesville, FL 32611-6580.
2. Graduate Research Assistant, Dept. of Civil & Coastal Engineering, Univ. of Florida, P.O. Box 116580, Gainesville, FL 32611-6580.
3. Fellow, CSIR Division of Mining Technology, Johannesburg, South Africa, 2006.
4. Professor, Dept. of Civil & Coastal Engineering., Univ. of Florida, P.O. Box 116580, Gainesville, FL 32611-6580.