1. Assistant Professor, Widener Univ., Dept. of Civil Engineering, Chester, PA 19013; formerly Manager of Technology Development, Tensar Earth Technologies, Inc., 5883 Glenridge Dr., Ste. 200, Atlanta, GA 30328.
2. Professor, Dept. of Civil Engineering, North Carolina State Univ., Campus Box 7908, Raleigh, NC 27695-7908.