1. Graduate Research Assistant, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC.
2. Graduate Research Assistant, Dept. of Computer Science, North Carolina State Univ., Raleigh, NC.
3. Associate Professor, Dept. of Computer Science, North Carolina State Univ., Raleigh, NC.
4. E.I. Clancy Distinguished Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC.