Recent Advances in Circuits, Systems, Telecommunications and Control Proceedings of the 4th European Conference of Systems (ECS '13), Proceedings of the 4th European Conference of Communications (ECCOM '13), Proceedings of the 4th European Conference of Control (ECC '13), Proceedings of the 4th European Conference of Circuits Technology and Devices (ECCTD '13), Proceedings of the 1st WSEAS International Conference on Wireless and Mobile Communication Systems (WMCS '13), Proceedings of the 1st WS