1. Concordia Institute for Information Systems Engineering, Concordia University, Canada. w_elkh@encs.concordia.ca, bentahar@ciise.concordia.ca
2. Faculty of Computers and Information, Menoufia University, Egypt. moh_marzok75@yahoo.com
3. Automatic Control and Systems Engineering, Sheffield University, United Kingdom. h.qu@sheffield.ac.uk
4. Concordia Institute for Information Systems Engineering, Concordia University, Canada. dssouli@concordia.ca