1. Assistant Professor, Civil Engineering Dept., City College of New York, New York, NY 10031.
2. Engineer, Krupp Uhde GmbH∕Thyssenkrupp AG, Dortmund, NRW, 44141, Germany.
3. Walter P. Murphy Professor, Civil Engineering Dept., Nothwestern Univ., Evanston, IL 60208.
4. Director of Research and Materials Engineering, NRMCA, Silver Spring, MD 20910.
5. Vice President, Technology Development Group, Boral Material Technologies Inc., San Antonio, TX 78229.