Prof. N.S. Cooray ( Japan)
Prof. Toshiichi Endo (Hong Kong )
Prof. Mario Brun (Argentina)
Prof. Wimal Rankaduwa (Canada )
Prof. Donathan Brown ( USA)
Prof. Francisco Delgado (Mexico)
Prof. Michael Kyobe (South Africa)
Prof. Klapproth, Florian (Germany)
Dr. Jerry Schnepp (USA)