A Study of the Correlation of the Recognition of the Sweat on the Fingertip with the Coefficient of the Friction Measured in Rubbing a Flat Surface with Forefinger

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  • 指腹部と物体表面の間の摩擦の測定と発汗の自覚に関する一考察
  • ユビ フクブ ト ブッタイ ヒョウメン ノ アイダ ノ マサツ ノ ソクテイ ト ハッカン ノ ジカク ニ カンスル イチ コウサツ

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Abstract

The frictional force between a fingertip and a flat surface of an object is not stable and changes each time. We measured the frictional force through rubbing on the surface of acryl plate by fingertip of forefinger of three men and eight women in life environment and reconfirmed that the frictional forces were not stable. Ten of eleven subjects succeeded to evaluate the difficulty to move the finger rubbing on the surface of the plate using a subjective rating scale method in five degrees. A subjective score revealed that the perceived interference was correlated to the magnitude of the frictional force between the finger and the surface. We recognized the sweat on the fingertip according to correlated value of the maximum coefficient of friction in the ten subjects though the sweat on the fingertip was not confirmed visually.

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