We developed an intuitively operational shoulder disarticulation prosthesis system that can be used without long-term training. The developed system consisted of four degrees of freedom joints, as well as a user adapting control system based on a machine learning technique and surface electromyogram (EMG) of the trunk. We measured the surface EMG of the trunk of healthy subjects at multiple points and analyzed through principal component analysis to identify the proper EMG measurement portion of the trunk, which was determined to be distributed in the chest and back. Additionally, evaluation experiments demonstrated the capability of four healthy subjects to grasp and move objects in the horizontal as well as the vertical directions, using our developed system controlled via the EMG of the chest and back. Moreover, we also quantitatively confirmed the ability of a bilateral shoulder disarticulation amputee to complete the evaluation experiment similar to healthy subjects.

The lelics of Lake Imba drainage works the Edo era is found in the northwestern part of the Chiba prefecture. The area in which the Lake lies is a part of the Kwanto Plain. The Lake being connected with the river Tone till 1922, all rain-water at the northwestern Kwanto Plain flowed into the Lake. Consequently the Tone Basin had to suffer from frequent floods. Especially since its waterway to the Tokyo Bay was converted to Tyoshi, damage was rather seriously. So they took consideration

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