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"Anywhere" and "anytime" are the ultimate properties of wireless communications. To achieve these goals, frequency reuse is one of the most important concepts that has to be considered in high user density networks providing various broadband services. This paper proposes an efficient resource allocation algorithm called Group Based Graph Coloring (GBGC) that exploits unused spectrum...
Wireless Sensor Networks WSNs are special networks consist of devices (sensor nodes) in large numbers and spatial distribution. They have various sensing capability and cooperate to accomplish common task. Clustering is one of the most effective techniques used to solve the problem of energy consumption in WSNs. Grid based clustering has proven its efficiency specially for high dynamic networks. The...
Wireless Sensor Networks (WSNs) have become a leading solution in many important applications such as intrusion detection, target tracking, industrial automation, smart building and so on. The sensor nodes are generally unattended after their deployment in hazardous, hostile or remote areas. These nodes have to work with their limited and non replenish able energy resources. Energy efficiency is one...
The waiting time for patients in outpatient departments of university hospitals is a problem throughout the world. Outpatient departments face increasing pressure to improve the quality of their services through effective appointment scheduling in an effort to reduce waiting time. We analyzed the appointment scheduling system in the Obstetrics Gynecology Department at King Abdulaziz University Hospital,...
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