1. Postdoctoral Research Associate, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., Ames, IA 50011.
2. Associate Professor, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., Ames, IA 50011.
3. Assistant Professor, Dept. of Industrial and Manufacturing Systems Engineering, Iowa State Univ., Ames, IA 50011.
4. Assistant Professor, Applied Linguistics and Technology Program, Iowa State Univ., Ames, IA 50011.