Mobile sensor networks rely heavily on inter-sensor connectivity for collection of data. Nodes in these networks monitor different regions of an area of interest and collectively present a global overview of some monitored activities or phenomena. A failure of a sensor leads to loss of connectivity and may cause partitioning of the network into disjoint segments. A number of approaches have be...

mobile sensor networks rely heavily on inter-sensor connectivity for collection of data. nodes in these networks monitor different regions of an area of interest and collectively present a global overview of some monitored activities or phenomena. a failure of a sensor leads to loss of connectivity and may cause partitioning of the network into disjoint segments. a number of approaches have bee...

Connectivity has significance in both of data collection and aggregation for Wireless Sensor Networks (WSNs). Once the connectivity is lost, relay nodes are deployed to build a Steiner Minimal Tree (SMT) such that the inter-component connection is reestablished. In recent years, there has been a growing interest in connectivity restoration problems. In previous works, the deployment area of a W...

Wireless sensor and actor network’s connectivity and coverage plays a significant role in mission-critical applications, whereas sensors and actors respond immediately to the detected events in an organized and coordinated way for an optimum restoration. When one or multiple actors fail, the network becomes disjoint by losing connectivity and coverage; therefore, self-healing algorithm is requi...

Hyperfragmentation of rivers by anthropogenic barriers is a major threat to biodiversity. Restoration policies are being adopted worldwide mitigate these impacts, particularly those on fish connectivity. We assessed the utility novel genetic index fragmentation, FINDEX, monitoring real-time responses two genera restoration operations at 11 weirs in France. The FINDEX outperformed traditional to...

This paper investigates the optimal connectivity restoration in segmented sensor networks, where mobile/relay nodes are optimally placed to form “bridges” among segments, such that both the average path length from nodes to the sink and the number of mobile nodes used are minimized. We formulate the optimal connectivity restoration as a multi-objective optimization problem and develop centraliz...

tehran city has been subject of critical environmental challenges during the course of 20th. century namely: massive population growth, broad expansion, reduction in urban open/green spaces, increasing in energy consumption and waste production. releasing industrial wastewater into river valleys have led to considerable changes in structure of city's natural landscape. the natural structur...

urban landscape structural analysis; focused on the remnant patch mosaic network as the component with closest interdependency with air and water related processes was undertaken to find and propose environmental planning suggestions.assessments demonstrate that remnant patch mosaic network structure of tehran is still restorable. with appropriate corrective measures based on the natural lay ou...

Partitioning in wireless sensor network is an important aspect of research in wireless networks. Clusters or partitions in the network can be formed on the basis of either geographical area of the nodes or on the basis of some performance parameters. Also the nodes which form the cluster are either homogenous or heterogeneous in nature. In this paper a review of the various techniques proposed ...