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It is proved that wireless network is suitable for disaster information infrastructure because of its robustness, mobility and flexibility. However current conventional wireless networks have limit in communication distance because of low electro-magnetic power density, non-directional antenna. This is quite fatal as emergency network particularly in mountain areas like Japan. In order to solve those...
More than 5 million of vending machines were so far installed in Japan. The quantity per head is the top in worldwide. One important factor of this success is that public security in Japan is well in force and that makes us possible to install vending machines on the street corner without concern for crime. As a result, unique "vending machine culture" to Japan was established. Recently...
In 2008, many disasters occurred in different places around the world. Remote sensing technique contributed significantly to observing and monitoring those disasters that occurred in remote locations. The ALOS satellite has observed the entire world using three sensors since its launch, thus providing important results soon after disasters strike. By comparing optical images or SAR amplitude images...
We performed a Ground Based SAR (GB-SAR) and PiSAR simultaneous experiment over a flood test site. In this site, one prefab was constructed in a baseball field of a Nihon University in Chiba, Japan. The PiSAR observations were done for three days with different soil moisture condition of ~25%, ~50%, and 100%. Some GB-SAR experiments have been also done in two of three days and the scattering process...
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