1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI.
2. Graduate Student, Dept. of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI.
4. Professor, Dept. of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI.