This author has not been identified. Look up 'Yongrui Qin' in GoogleThis author has not been identified. Look up 'Quan Z. Sheng' in GoogleThis author has not been identified. Look up 'Nickolas J. G. Falkner' in GoogleThis author has not been identified. Look up 'Schahram Dustdar' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Hua Wang' in GoogleThis author has not been identified. Look up 'Athanasios V. Vasilakos' in Google