1. Professor, Dept. of Civil and Environmental Engineering, California Polytechnic State Univ., San Luis Obispo, CA.
2. Research Fellow of Global Waste Research Institute and Lecturer, Dept. of Civil and Environmental Engineering, California Polytechnic State Univ., San Luis Obispo, CA.
3. Director, Global Waste Research Institute, California Polytechnic State Univ., San Luis Obispo, CA.