1. Assistant Professor, Dept. of Manufacturing and Construction Engineering Technology, Indiana Univ.-Purdue Univ. Fort Wayne, P.O. Box 9003, Fort Wayne, IN 46805.
2. Assistant Professor, Dept. of Architectural Engineering, Pennsylvania State Univ., University Park, PA 16802.
3. Assistant Professor, Dept. of Applied Engineering, Safety and Technology, Millersville Univ., P.O. Box 1002, Millersville, PA 17551.