1. Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Nebraska–Lincoln, Lincoln, NE.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Nebraska Center for Materials and Nanoscience, Midwest Roadside Safety Facility (MwRSF), Univ. of Nebraska–Lincoln, Lincoln, NE.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Nebraska–Lincoln, Lincoln, NE.