A sensor network is a network of low-powered, energy-constrained nodes equipped with sensor(s) and wireless communication devices that are intended to sense some physical phenomena from the area of deployment. Recent technological advances in the field of micro-electromechanical systems (MEMS) have made the development of multi-functional sensor nodes technically and economically feasible. The ...

Sensor nodes are low power, tiny, and computationally restricted microelectromechanical devices that usually run on battery. They are capable of communicating over short distances and of sensing information for specific purposes. In sensor networks, large amount of sensor nodes are deployed over a wide region. For secure communication among sensor nodes, secure links must be established via key...

Wireless sensor actor networks are composed of sensor and actor nodes wherein sensor nodes outnumber resource-rich actor nodes. Sensor nodes gather information and send them to a central node (sink) and/or to actors for proper actions. The short lifetime of energy-constrained sensor nodes can endanger the proper operation of the whole network when they run out of power and partition the network...

WirelessHART is a standard that has been developed by four major companies in control systems. They mainly deal with field devices and their monitoring and controlling aspects. In this chapter, components are any process devices. Sensor nodes are referred to as nodes or sensor nodes. The sensor nodes can be connected to a component to make it wireless. The sensor nodes are deployed in uniform d...

Information retrieval is an essential activity for extraction of information from unstructured data. This data uses simpler data model rather than traditional column database which is based on Boolean and Vector space model. There is need to focus on process like information gathering, observation and data encryption process for communication among sensor nodes. These sensor nodes play an impor...

In order to extend the availability of the wireless sensor network and to extract maximum possible information from the surveillance area, proper usage of the power capacity of the sensor nodes is important. Our work describes a dynamic relocation algorithm called MaxNetLife, which is mainly based on utilizing the remaining power of individual sensor nodes as well as properly relocating sensor ...