Device-centric wireless networks, including Deviceto-Device communications and Multi-hop Cellular Networks, are expected to perform a pivotal role in the design of future 5G wireless networks. In addition, opportunistic schemes have shown to have the potential to enhance the efficiency of devicecentric wireless networks by intelligently exploiting contextand content-awareness. In this context, ...

Vastly increasing capacity and coverage demand in communication networks accompanied by energy efficiency challenge is getting attraction in research topics of this area. In this paper, an improved structure of Phantom cell heterogeneous networks (HetNets) is proposed to fulfil these requirements in the next generation cellular networks.It will be shown that the proposed orthogonal frequency-di...

Having dealt with the first two important criteria for data embedding in medical images namely, robustness towards attacks and imperceptibility to human visual system, the third and final most important criterion is optimizing the data hiding capacity parameter. This is especially a very important criterion since it deals with medical data management. Embedding of data over digital images can c...

Since the Nara Hydropower Station was put into operation, it has far exceeded designed service life of 25 years. The generator insulation is seriously aging, water leakage turbine large, working efficiency unit low, operation failure occurs frequently, and hidden safety problems are prominent. At present, upstream cascade power station leading reservoir have been constructed hydraulic resources...