巻号一覧
51 巻 (2005)
- 3+4 号 p. 40-
- 2 号 p. 21-
- 1 号 p. 1-
51 巻, 3+4 号
選択された号の論文の2件中1～2を表示しています
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Original Papers
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Mário LIMA, Lubos HES, Rosa VASCONCELOS, Jorge MARTINS2005 年 51 巻 3+4 号 p. 40-46
発行日: 2005年
公開日: 2006/04/12
ジャーナル フリーA new method to characterise the coefficient of friction of textile fabrics is proposed. The principle is based on the dry clutch, where an annular shaped flat upper body that is kept still, rubs against a lower flat surface, which rotates around a vertical axis at a constant angular velocity. Friction coefficient between the two contacting surfaces is then proportional to the level of the dragging torque between them, measured by means of a precision reaction torque sensor. Contact pressure is constant, given by the own weight of the upper body. The signal from the torque sensor is digitalised through an electronic interface and fed into a PC where friction coefficient is worked out. Finally, experimental work is reported.抄録全体を表示PDF形式でダウンロード (387K) -
Hiroko YOKURA, Masae NAKANISHI, Masako NIWA2005 年 51 巻 3+4 号 p. 47-52
発行日: 2005年
公開日: 2006/04/12
ジャーナル フリーIn order to design thermally desirable pillows, the relation between the sensory evaluation of the coolness of pillows and their thermal transport properties was investigated. The perception value Pv of coolness was correlated with the dry heat loss Qd of the pillow. The pillows with a large value of Qd were regarded as cooler. The Pv value tended to correspond to the apparent thermal conductivity Ke of the padding material used in the top side of the pillow. Pillows with a large value of Ke were regarded as cooler. The pillows with a small value for the contact area CA of the head and pillow showed a cooler feeling. The temperature Tm between the head and pillow after 30 minutes of use was measured. A pillow that had larger values for Qd and Ke and a smaller value for CA showed a lower value for Tm, and was regarded as being cooler.抄録全体を表示PDF形式でダウンロード (1173K)
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