1. Ph.D. Student, Lyles School of Civil Engineering, Purdue Univ., West Lafayette, IN.
2. Ph.D. Student, School of Industrial Engineering, Purdue Univ., West Lafayette, IN.
3. Associate Professor, School of Industrial Engineering, Purdue Univ., West Lafayette, IN.
4. Associate Professor, Lyles School of Civil Engineering, Purdue Univ., West Lafayette, IN.