Energy hole is an inherent problem caused by heavier traffic loads of sensor nodes nearer the sink because of more frequent data transmission, which is strongly dependent on the topology induced by the sensor deployment. In this paper, we propose an autonomous sensor redeployment algorithm to balance energy consumption and mitigate energy hole for unattended mobile sensor networks. First, with ...

With severe spectrum shortage and high capacity requirement in future cellular networks, millimeter wave (mmWave) frequencies is a candidate for next-generation wireless networks. Due to the sensitivity of mmWave signals to blockage and using directional beamforming in both transmitter and receiver, novel models are needed to analyze cellular networks operating in mmWave frequencies. Base stati...

The Sensor Nodes (SN) play an important role in various hazardous applications environments such as military surveillance, forests, battlefield, etc. Wireless Network (WSN) comprised multiple numbers of sensor nodes which are used to perform sensing the physical conditions and subsequently transmitting data Base Station (BS). have limited batteries. random distribution areas causes overlapping ...

By varying the density of solution-processed lithium fluoride (sol-LiF) nanoparticles at the interface between tin-doped indium oxide (ITO) and poly(3,4ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), we have demonstrated that the electronic hole collection efficiency of an organic photovoltaic cell can be optimized through tuning the energy level alignment at the ITO/PEDOT:PSS inter...

An experimental investigation of the local film cooling effectiveness and heat transfer coefficient downstream of a row of elongated holes in a simulated axial turbine blade tip is presented. Film cooling is needed to protect the turbine blade tip region from high heat transfer rates, especially when cooling by convection is insufficient to keep the temperature distribution of the blade within ...

Coverage hole detection is an important research problem in wireless sensor network community. However, distributed approaches proposed recent years for coverage have high computational complexity. In this paper, we propose a novel approach networks called FD-TL (Force-directed and Transfer-learning) which based on layout generation capability of Force-directed Algorithms image recognition powe...

The preparation of highly efficient perovskite nanocrystal light-emitting diodes is shown. A new trimethylaluminum vapor-based crosslinking method to render the nanocrystal films insoluble is applied. The resulting near-complete nanocrystal film coverage, coupled with the natural confinement of injected charges within the perovskite crystals, facilitates electron-hole capture and give rise to a...