1. ESYCOM, UMR 9007 CNRS, Univ Gustave Eiffel, 77454 Marne-la-Vallée, France
2. Si-Ware Systems, Cairo 11361, Egypt
3. Faculty of Engineering, Ain-Shams University, Cairo 11535, Egypt
4. CINTRA, IRL 3288 CNRS-NTU-THALES, Nanyang Technological University, Singapore 637553, Singapore