Computers and simulation in modern science selected papers from the WSEAS conferences : University of Cambridge (UK), University of Harvard (USA), Massachusetts Institute of Technology - MIT (USA), China Jiliang University (China), Beijing Jiaotong University (China), University Paris-Sud (France), Federal University UFRN, (Brazil), Romanian Academy of Science (Romania), Univ. Politecnica of Bucharest (Romania), Technical University of Sofia (Bulgaria), Tianjin University of Technology and Educa