1. Department of Engineering and Computer Science, West Texas A&M University, WTAMU Box 60767, Canyon, TX 79016.
2. Bridge Engineering Center, Iowa State University, 2711 South Loop Drive, Suite 4700, Ames, IA 50010.
3. Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011.