Koichi Shin

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This paper newly proposes the human detection system around a detached house using UHF band transmitters, for the purpose of crime-prevention on the premises. In Japan, we can easily utilize some licence-free specified low power radio stations as UHF band transmitters, such as transceivers using 400 MHz band and wireless microphone systems using 800 MHz(More)
We have gotten the first opportunity to observe characteristics of the FM radio wave propagated over the epicenter. In our observation system installed at Nobeyama, fluctuations of the FM radio wave of 82.3MHz had been observed on the two Niigata Prefecture earthquakes on October 23 in 2004 and on July 16 in 2007. In this paper, the propagation(More)
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