Yasuhiro Kushihashi

Motion Recognition for Forearm Using EMG Frequency Distribution.

This paper describes a development of a method for motion recognition using frequency distribution considering motion transition in order to build an exoskeleton robot system for assistance in rehabilitation. Firstly, a method of recognition based on calculation of differences in frequency distribution between template data and current one has been proposed. Additionally, two sets of parameters were assembled to deal with keeping stiffness in sustained action and compliance in motion transition. Furthermore, method for detection of motion transition has been proposed and implemented into the system. As the result, the recognition ratio has been successfully increased to eighty percent by using the above-mentioned method.

Development of a measuring system for bioelectric potential distribution in plant surface

In order to investigate the behavior of the bioelectric potential distribution on the surface of callus, leaf or root under stimulus, a multichannel biological potential measuring system was developed. The system comprises grid-patterned multielectrode made by sputtered silver, gold or platinum onto, the plate glass, the 64 channel-bioelectric amplifier, a constant temperature box, callus cultivating capsules containing magnetic stimulator, and a computer to collect and store data. This system is indispensable to study sensing or transferring information in plant, providing the morphogenetic field forming around plants. Consequently, spike potential frequently induced by the stimulus, and spontaneous spike potential often dispersed by the stimulus can be obtained. In addition, the bioelectric potential distribution fluctuates along the root approximate every 30minutes. It is, therefore, the potential distribution is related to morphogenetic field. Accordingly, it is expected that the presently developed system will enable to examine interrelationships among electric field and development, differentiation and growth in plant.