B.F. Goodrich R&D Center, Cleveland, OH BP (America) Research, Warrensville, OH General Motors Research Labs, Detroit, MI General Motors, Detroit, MI Goodyear Tire and Rubber, Akron, OH Hewlett-Packard Research Labs, Palo Alto, CA Institute for Information Sciences, Academia Sinica, Taipei, Republic of China. NASA Lewis Research Center, Cleveland, OH Picker International, Cleveland, OH UNDP--United Nations Development Program Westfield Companies, Westfield Center, OH Lanzhou University, Lanzhou China