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The emerging field of wireless sensor networks (WSNs) allows novel methods of designing surveillance and tracking systems. Tracking moving targets in WSNs is a canonical application of practical importance to military as well as civilian fields. Since WSNs are highly constrained in computation, communication and energy resources, the application is required to be designed with minimal resource consumption...
Information on the Web is growing dramatically. Without a recommended system, the users may spend lots of time on the Web in finding the information they are interested in [5]. With the Web becoming the most popular media for collecting, sharing, and distributing information, it is very common for educational institutions, and organizations to develop Web-Based Training (WBT) systems [6]. Data mining...
We propose a four-layer architecture model (FLAM) to obtain the potential energy savings for sensor nodes in large scale wireless sensor networks. The very first layer, the bottom layer is a network of a resource-constrained sensor nodes deployed in the field. The second layer is ad hoc network formed by resource-rich dynamic sink nodes, also knows as cluster sink nodes. The third layer consists of...
The paper presents design and development of Wireless Telecommand (TC) and Telemetry (TM) subsystems for satellite. The Low Rate Wireless Personal Area Network (LR-WPAN) IEEE 802.15.4/ZigBee standard is used for wireless command distribution and acquisition of health parameters from different subsystems in a spacecraft. The wireless TC system is designed to operate 100 Bps, and wireless TM system...
CORDIC stands for crdinate rotation digital computer, is an algorithm developed to compute trigonometric function through series of rotation. Para-CORDIC is the latest method of implementation of CORDIC equations and has an advantage over other implementation algorithm in terms of speed and accuracy. This paper presents the implementation of para-CORDIC algorithm and its applications in satellite...
We propose a three-layer architecture model (TLAM) for wireless sensor networks. The first layer (bottom layer) consists of a network of resource-constrained sensor nodes deployed in the field. The second layer contains a set of resource-rich dynamic sink nodes forming an ad hoc network. The sinks at layer second are responsible to monitor and collect data from a region, called cluster. So the sinks...
Presence, broadly defined as an event publish-notification infrastructure for converged applications, has emerged as a key mechanism for collecting and disseminating context attributes for next-generation services in both enterprise and provider domains. Current presence-based solutions and products lack in the ability to a) support flexible user-defined queries over dynamic presence data and b) derive...
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