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UWB-IR is an excellent choice for precision positioning systems because of its inherent advantage in providing very good accuracy while operating dense multipath environments. This paper describes a UWB-IR transceiver that acts as an active reflector for ranging applications. The active reflector works as a ranging or positioning tag that can be attached to objects whose range or position needs to...
With the advent of Wireless Sensor Networks (WSN's) covering a whole gamut of applications which is getting broader by the day and it is indeed necessary to study the nuances in WSN out of which aforementioned is one. WSN's consists of large number of deployed sensor nodes and a base node for aggregating data from deployed sensor nodes. Wireless Sensor Network's (WSN) are attribute based and they...
Given a set of points P and a query point q, the reverse furthest neighbor (Rfn) query fetches the set of points p isin P such that q is their furthest neighbor among all points in PU{q}. This is the monochromatic Rfn (Mrfn) query. Another interesting version of Rfn query is the bichromatic reverse furthest neighbor (Brfn) query. Given a set of points P, a query set Q and a query point q isin Q, a...
Signature can be seen as an individual characteristic of a person which if modeled with precision can be used for his/her validation. Automatic signature verification is a technique that saves time and money. The paper is focused on skilled forgery detection. In addition, it also lays emphasis on the extraction of the critical regions which are more prone to mistakes. It follows a graph matching approach,...
A robust approach to detection and tracking of multiple moving targets from a moving camera is presented. The main novelty of this approach is that objects are represented using efficient compact form of the colour correlogram. Like previous correlograms, this encodes both spatial pattern and appearance information about the target. However it is less complex to compute, making it applicable to real...
This paper provides an analysis of optimum offered load that maximizes the throughput of IEEE 802.11 media access control (MAC) protocol for the multihop network. We extend Ping Chung Ng analysis in presence of hidden terminal and capture effect, with some modifications in the derivation of throughput. The analytical throughput results are validated against ns-2 simulation using direct sequence spread...
This paper provides an analysis of optimum offered load that maximizes the throughput of IEEE 802.11 Media Access Control (MAC) protocol for the multihop network. We extend Ping Chung Ng analysis in presence of hidden terminal and capture effect, with some modifications in the derivation of throughput. The analytical throughput results are validated against simulation using Direct Sequence Spread...
This paper describes an approach to tracking multiple independently moving objects observed from moving cameras. The method addresses difficulties typically associated with tracking, including changes in background, parallax in the scene, arbitrary camera motion, object occlusions, cross-overs, and appearance changes. Using a bottom up approach, independently moving objects are detected in images...
Wireless Sensor Networks (WSN) are planned to be deployed in critical applications like border surveillance, monitoring physical and chemical environmental phenomena, intelligent agriculture and personal healthcare. Theses days, researcherspsila vision is to implant sensor nodes in the human body, which will monitor the biological parameters and report them to the patient and the doctor, when abnormalities...
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