The purpose of this study is to present the evaluation method of contact resistance between hands and building elements from the view point of safety. In this repot, we firstly carried out sensory test, to make the evaluation scales of posture keeping in slipperiness with hands. Next, we developed the slip meter that could measure the slip resistance of plane samples. Then, coefficients of slip resistance of the plane samples by various slider materials, shapes, vertical loads and pull speeds are searched with the slip meter. Also, the relations are investigated between slip resistance and evaluation scales of posture keeping in slipperiness. As a result, we presented main points of measurement method of slip resistance of building elements and members with hands.
The prebuckled cylindrical (PC) shell represents a new structural concept suitable for use in the undersea environment. The externally pressurized PC shell has been shown to be more resistant to buckling failure than a comparable “true” cylinder. The technical feasibility of this new concept has now been realized by the design and construction of a large-scale prototype made entirely of transparent acrylic plastic. The success of this initial effort offers encouragement to further pursue applications of this novel structural form to other uses in the ocean.
The aim of this study is to investigate the difference between skilled workers and beginners focusing on the applied force and the movement of their arms during simplified plastering with mortar. The force was recorded by force plate and the arm movement was recorded by myo-electric potential from four shoulder and forearm muscles. Five skilled workers and seven beginners were selected as the subjects. They plastered with 200g weight mortar at a time. As a result, the force and the myo-electric potential of shoulders by the skilled workers tended to be larger until 1.0s from the rising of the force.
In this paper, the authors reconsider to improve the slider in the method of measuring the slipperiness of wet floors with bare feet. First, sensory tests for making psychological scale of slipperiness were carried out with many and various wet floors. Next, they studied on the adaptability of C.S.R BF with many and various wet floors by using psychological scale. Then, the new slider of ONO PPSM (ONO Portable Pull Slip Meter) was developed, corresponded to psychological scales. Finally, the relation between a measured value (C.S.R BF 2) with the new slider of ONO PPSM and the evaluation scales were presented as the evaluation indexes.
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