We consider an unreliable wireless sensor gridnetwork with n nodes placed in a square of unit area. We are interested in the coverage of the region and the connectivity of the network. We first show that the necessary and sufficient conditions for the random grid network to cover the unit square region as well as ensure that the active nodes are connected are of the form p(n)r(n) ∼ log(n) n , w...

Most existing deployment algorithms for event coverage in underwater wireless sensor networks (UWSNs) usually do not consider that network communication has non-uniform characteristics on three-dimensional underwater environments. Such deployment algorithms ignore that the nodes are distributed at different depths and have different probabilities for data acquisition, thereby leading to imbalan...

One of the most fundamental tasks of wireless sensor networks is to provide coverage of the deployment region. In this paper, we study the coverage of a line segment with a set of wireless sensors with adjustable coverage ranges. Each coverage range of a sensor is an interval centered at that sensor. The objective is to find a range assignment with the minimum cost. There are two variants of th...

In wideband code division multiple access (WCDMA) cellular systems, the coverage radius of a cell depends on its current capacity level. As a result, existing WCDMA radio network dimensioning approaches require that coverage and capacity planning be carried out jointly in an iterative manner in order to obtain the minimum site count needed while fulfilling both coverage and capacity requirement...

This paper explores the joint cache placement and 3D deployment of Unmanned Aerial Vehicle (UAV) groups, utilizing potential game theory a two-hop UAV cooperative caching mechanism, which could create tradeoff between latency coverage. The proposed scheme consists three parts: first, initial 2D location groups is determined through K-means, with optimal altitude based on coverage radius. Second...

Recently, full-view coverage was introduced to capture intruders from any direction in camera sensor networks (CSNs), it can identify more effectively than traditional coverage. However, the usually requires a large number of sensors so that its estimation problem becomes complicated. In addition, practical application scenario, are often randomly deployed an irregular bounded region. this pape...

This study presents a plan for seismic monitoring of a region around a potential nuclear power plant. Seismic monitoring is needed to evaluate seismic risk. The International Atomic Energy Agency has set guidelines on seismic hazard evaluation and monitoring of such areas. According to these guidelines, we have made a plan for a local network of seismic stations to collect data for seismic sour...

conclusions the radiological findings of the present study showed that the use of a coral-dcfgp mixture led to superior bone defect healing and rapid graft incorporation when compared to the use of solely coral or dcfgp. background currently, coral is used as an osteoconductive material. demineralized calf fetal growth plate (dcfgp) has also been used as a source of osteoinduction. objectives t...

We consider a geometric coverage process consisting of a random number of disks, or grains, having random radii and positions in the plane. Our objective is granulometry: estimation of a parameter of the disk radius distribution, which is important in diverse applications such bio-assay, balistics, and numerical taxonomy. These disks are only incompletely observed due to mutual occlusion, spati...