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An important issue faced while employing Pyroelectric InfraRed (PIR) sensors in an outdoor Wireless Sensor Network (WSN) deployment for intrusion detection, is that the output of the PIR sensor can, as shown in a recent paper, degenerate into a weak and unpredictable signal when the background temperature is close to that of the intruder. The current paper explores the use of an optical camera as...
An optical camera was recently employed by a subset of the authors as a sensing modality complementary to that of a Pyroelectric InfraRed (PIR) sensor, for carrying out intrusion detection and classification in an outdoor environment. The aim there was to develop a classification algorithm that mimicked the performance of the PIR sensor and which was complementary to the PIR in the sense that it could...
Prior work by a subset of the authors led to the development of a Pyroelectric Infrared (PIR) sensor platform for the purposes of distinguishing in an outdoor environment, between human and animal intrusion while rejecting false alarms arising from wind-blown vegetation. The algorithm employed there, modeled the intrusion signal as a linear combination of chirplets. The extracted chirplet-based features...
The actual working condition of transformers plays an important role for uninterrupted power supply in power grid. There is always a pressure on power utilities to invent an effective maintenance strategy to conserve the transformer health, which should give the possibility to know transformer working condition for a long interval of time. In this paper, a fuzzy model of transformer temperature control...
Various advantages of permanent magnet generator such as higher efficiency than wound rotor, reduced cooling requirement, simpler construction, less service, eliminating need for field excitation & slip rings, etc. increase its importance in various industries. In this paper, fuzzy model of permanent generator has been developed with a set of linguistic rules which may be helpful for study of...
Injections of lignocaine as local anaesthetic for pain control in oral and maxillofacial surgery can themselves be painful. The time of onset of anaesthesia is from 3 to 5min. Sodium bicarbonate has been used worldwide to reduce both these drawbacks to the injection, so making procedures more acceptable. This randomised prospective trial of 100 patients aged 18–55 years who were given 3 nerve blocks...
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