Results 271 to 280 of about 4,646,261 (335)

MCH-EOR: Multi-objective Cluster Head Based Energy-aware Optimized Routing algorithm in Wireless Sensor Networks

Sustainable Computing: Informatics and Systems, 2020
Hierarchical Wireless Sensor Networks (WSNs) have got vital application domains in modern era especially in monitoring and tracking of events, and without human intervention.
Deepak Mehta, S. Saxena
semanticscholar   +1 more source

WSN Clustering Algorithm Based on Cluster Head Reappointment

2012 Second International Conference on Instrumentation, Measurement, Computer, Communication and Control, 2012
Recently, in order to improve the energy efficiency of Wireless Sensor Network, wide research has been carried out. At present, most of the presented methods are based on the assumption that nodes can be elected cluster heads with the uniform probability in each round. So it's hard to implement those methods.
Yong-Zhen Li, Ai-Li Zhang, Shimei Jin
openaire   +1 more source

HQCA-WSN: High-quality clustering algorithm and optimal cluster head selection using fuzzy logic in wireless sensor networks

Fuzzy Sets Syst., 2020
Reducing the consumption of energy and the network lifetime are the main challenges that affect wireless sensor networks (WSNs). High-quality clustering is one of the most important approaches for reducing the energy consumption in WSNs. Various criteria
A. Baradaran, K. Navi
semanticscholar   +1 more source

Cluster Headache After Head Injury

Headache: The Journal of Head and Face Pain, 1987
SYNOPSIS Four patients developed cluster headaches after minor head injuries that caused no permanent neurologic or CT abnormalities. None had had headaches previously. The headaches of the three whose histories were known in detail either corresponded to the injury site or evolved from an earlier headache that did.
openaire   +2 more sources

Cluster-Head Selection Mechanism in Scenario with Uneven Clustering

2012 8th International Conference on Wireless Communications, Networking and Mobile Computing, 2012
Aiming at the shortcomings of the low energy adaptive clustering hierarchy (LEACH) routing protocol, an improved protocol in scenario with uneven clustering is proposed. In order to choose the right cluster-head, it considers many factors, including the residual energy of sensor nodes, the distance between the nodes and the base station, the difference
Yongjian Luo, Deyang Shi, Weidong Zhang, Gang Wu   +3 more
openaire   +1 more source

Head and facial injuries due to cluster munitions

Neurological Sciences, 2014
Cluster munitions are weapons that scatter smaller sub-munitions intended to kill or mutilate on impact. They have been used by the Israeli army in the south of Lebanon and are now scattered over wide rural areas affecting its inhabitants. Because of their easily "pickable" nature, sub-munitions can inflict injuries to the head and face regions.
Youssef, Fares, Jawad, Fares, Souheil, Gebeily   +2 more
openaire   +2 more sources

Cluster Head election in Wireless Sensor Networks

2014 10th International Conference on Information Assurance and Security, 2014
Wireless Sensor Networks (WSNs) consist of a collection of cheap, easy to deploy Sensor nodes arranged together to fulfill a specific purpose (monitoring, tracking …etc.). A WSN network is composed of a Base Station (BS) and collection of sensors. There are a lot of approaches for the network construction.
Sara El-Refaay, Marianne A. Azer, Nashwa Abdelbaki   +2 more
openaire   +1 more source

Increasing Availability and Survivability of Cluster Head in WSN

2008 The 3rd International Conference on Grid and Pervasive Computing - Workshops, 2008
Recently WSN has become one of the most interesting networking technologies since it can be deployed without communication infrastructures. The cluster-based wireless sensor network (WSN) can enhance the whole network lifetime. In the clustered environment, the data gathered by the sensors is communicated to the base station (BS) through a hierarchy of
Thandar Thein, Sung-Do Chi, Jong Sou Park   +2 more
openaire   +1 more source

Systematic selection of cluster heads for data collection

Journal of Network and Computer Applications, 2012
We present a systematic approach to selecting cluster heads (CHs) in networked sensing systems for data aggregation based on the idea of dominating sets of a graph. A set of vertices, D of a graph G=(V,E) is a k-dominating set if every vertex v@?V, is connected to some vertex in D via path of length less than or equal to k.
Kranthi K. Mamidisetty, Michael J. Ferrara, Shivakumar Sastry   +2 more
openaire   +1 more source

Dynamic cluster head for lifetime efficiency in WSN

International Journal of Automation and Computing, 2009
Saving energy and increasing network lifetime are significant challenges in wireless sensor networks (WSNs). In this paper, we propose a mechanism to distribute the responsibility of cluster-heads among the wireless sensor nodes in the same cluster based on the ZigBee standard, which is the latest WSN standard.
Hesham Abusaimeh, Shuang-Hua Yang
openaire   +1 more source