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Wireless Sensor Networks (WSN) has become an attractive field for research due to the increasing number of applications. This paper uses a WSN to monitor Electromagnetic Pollution and report any violations in power levels. An event-by-event simulator is developed to calculate network lifetime and study important factors affecting it. One of these factors is(More)
Knowing the correlation between the Nd(3+) excited-state lifetime in proton-exchanged waveguides and the phase diagram of the H(x)Li(1-x)TaO(3) compound permits optimized waveguide fabrication parameters to be found. These have been used to produce a Nd:LiTaO(3) waveguide laser with a threshold of 2.9 mW and a slope efficiency of 33%, in good agreement with(More)
We report what is to our knowledge the f irst observation of quasi-phase-matched parametric fluorescence in the 1.2-2.3-microm region, at ambient temperature, in lithium tantalate waveguides, using a pump wavelength between 805 and 845 nm. The signal fluorescent power depends strongly on the proton concentration in the waveguide, and signals of up to 7 pW(More)
Wireless Sensor Networks (WSN) have recently become one of the major research areas in the wireless communication field and are implemented in a variety of applications. One of these applications that will be tackled in this paper is monitoring electromagnetic (EM) pollution that is mostly caused by a variety of wireless devices that we use in our daily(More)
Wireless Sensor Networks (WSNs) are sensor based networks that are widely used in various critical applications and require the network to have a prolonged lifetime. However, these networks rely on battery-operated sensors that cause the network to be resource-constrained. Therefore, there is a continuous urge to efficiently exploit the network's energy,(More)
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