1. Former Graduate Student, Dept. of Civil Engineering and Surveying, Construction Engineering, Univ. of Puerto Rico at Mayaguez Campus, P.O. Box 9000, Mayaguez, PR 00681-9000.
2. Professor, Dept. of Civil Engineering and Surveying, Construction Engineering, Univ. of Puerto Rico at Mayaguez Campus, P.O. Box 9000, Mayaguez, PR 00681-9000.
3. Associate Professor, Dept. of Civil Engineering and Surveying, Construction Engineering, Univ. of Puerto Rico at Mayaguez Campus, P.O. Box 9000, Mayaguez, PR 00681-9000.