1. Department of Computer Science, City College, New York, USA
2. Institut für Informatik, Universität Bayreuth, Germany
3. School of Computing, Soongsil University, Seoul, Korea
4. School of Electronics and Information Engineering, Hankuk University of Foreign Studies, Korea
5. Mathematical and Computer Sciences and Engineering Division, King Abdullah University of Science and Technolgy, Thuwal, Kingdom of Saudi Arabia