Yoshinori Tanaka

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In Japan, the total number of mobile-phone and personal handy-phone system (PHS) users reached 111 million as of the end of February 2009 and the penetration rate of the third-generation mobile communications system (IMT-2000) exceeded 88%. These figures testify to the provision of a data communications environment for mobile users. At the same time, the(More)
SUMMARY The performance of a passive RFID system in a dense multi-reader environment is limited by both reader-to-reader interference and reader-to-tag interference. In this paper, we formulate a practical RFID system model which takes into account the non-linear demodulation of the tags and the transmission spectrum of the readers. Using this model, we(More)
Human beings cannot control a position of sphere on the disk without seeing it. Because under such a condition, as we determine the position and estimate the motion of sphere by use of visual information, it is very difficult for human beings to control it using only tactile or force information of a hand. This is why the tactile and the force information(More)
The objective of this study is to verify if only the use of robotic force feedback enables indirect and dynamic manipulations which are difficult for human beings to perform. Human beings usually control the trajectory of an object using visual feedback; force/tactile information are secondarily employed because they are further qualitative in comparison(More)