1. Department of R&D, K3Y Ltd., Sofia, Bulgaria
2. Department of Computer Science, Democritus University of Thrace, Kavala, Greece
3. Department of Networks and Digital Media, Kingston University, London, U.K.
4. SIDROCO Holdings Ltd., Nicosia, Cyprus
5. MetaMind Innovations, Kozani, Greece
6. Department of Electrical and Computer Engineering, University of Western Macedonia, Kozani, Greece