In mission critical applications, all critical points (CPs) are to be monitored effectively. Even a single node failure in the Wireless Sensor Network (WSN) may cause coverage hole, reducing the lifetime of the network. The sensor has nonrechargeable battery which makes energy supervision inevitable. The proposed Energy Efficient Coverage based Artificial Bee Colony Optimization (EEC-ABC) appro...

The utilization of millimeter-wave (mmWave) bands in 5G networks poses new challenges to network planning. Vulnerability blockages at mmWave can cause coverage holes (CHs) the radio environment, leading link failure when a user enters these CHs. Detection CHs carries critical importance so that necessary remedies be introduced improve coverage. In this letter, we propose novel approach identify...

We introduce tools from computational homology to verify coverage in a sensor network. Our methods are unique in that, while they are coordinate-free and assume no localization or orientation capabilities for the nodes, there are also no probabilistic assumptions. We demonstrate the robustness of the techniques by adapting them to a variety of settings, including static planar coverage, 3-d bar...

Graphene oxide (GO) is employed as a hole conductor in inverted planar heterojunction perovskite solar cells, and the devices with CH₃NH₃PbI₃-xClx as absorber achieve an efficiency of over 12%. The perovskite film grown on GO exhibits enhanced crystallization, high surface coverage ratio as well as preferred in-plane orientation of the (110) plane. Efficient hole extraction from the perovskite ...

10.1056/nejmp1011625 nejm.org 1 the Medicare Part D benefit.1 Several months ago, seniors who had reached the spending threshold that marked the beginning of their doughnut hole began to receive their $250 rebate checks. Incrementally between now and 2020, the coverage gap will be filled with subsidies from manufacturers of brandname drugs and from the federal government. Thus, the ACA, like Pa...

Coverage is one of the fundamental problems in wireless sensor networks (WSNs) since it is an important measure of Quality of Service (QoS) for the network’s applications. However, due to random development, power exhausting, intrusion and attacking of other malice nodes, coverage holes often appear and undermine the networks. In order to solve this problem, we present a decentralized, coordina...

In wireless sensor networks (WSNs), certain areas of the monitoring region may have coverage holes and serious coverage overlapping due to the random deployment of sensors. The failure of electronic components, software bugs and destructive agents could lead to the random death of the nodes. Sensors may be dead due to exhaustion of battery power, which may cause the network to be uncovered and ...

This paper analyzes the effect of particle-hole symmetry on the behavior of the tracer diffusion coefficient as well as the jump diffusion coefficient. The coefficients are obtained by performing a random walk of individual atoms in a two-dimensional square lattice at monolayer, using the n-fold way Monte Carlo simulation. Different hopping mechanisms have been introduced to study the effect of...

We are proposing a self deploying mobile sensor network which is empowered with event based relocation of redundant sensors for enhancing the quality of event sensing. Energy efficient Cell quorum based protocol is used for communication between event location and redundant sensors. Computationally light cascaded reorganization of sensor is suggested for relocation of sensors. The proposed meth...