Theodoros Alexopoulos(National Technical Univ. of Athens (GR)), Stavros Maltezos(National Technical Univ. of Athens (GR)), Evangelos Gazis(National Technical Univ. of Athens (GR)), George Iakovidis(Brookhaven National Laboratory (US)), Venetios Polychronakos(Brookhaven National Laboratory (US)), Lorne Levinson(Weizmann Institute of Science (IL))