1. Visiting Assistant Professor, Purdue Univ. Calumet, Powers Building, Room 211, 2200 169th St. Hammond, IN 46323 (corresponding author).
2. Research Assistant, Lyles School of Civil Engineering, Hampton Hall, Purdue Univ., 550 Stadium Mall Dr., West Lafayette, IN 47907; Professor, School of Civil Engineering and Geomatics, Universidad del Valle, Santiago de Cali 760032, Colombia.
3. Associate Professor, Lyles School of Civil Engineering, Purdue Univ., Hampton Hall, 550 Stadium Mall Dr., W. Lafayette, IN 47907.