单词 | skin resistance |
释义 | skin resistancen. 1. Chiefly Physics and Nautical. = skin friction n. at skin n. Compounds 5. ΘΚΠ the world > matter > physics > mechanics > force > [noun] > resistance > friction > specific internal friction1797 surface friction1834 skin resistance1855 static friction1865 skin friction1869 stiction1946 1855 Minutes Proc. Inst. Civil Engineers 1854–5 14 302 He conceived it would be interesting to compare the friction in pipes, with that known in vessels by the term, ‘skin resistance’, as it appeared to be an analogous case. 1875 Eng. Mech. 3 Sept. 634/3 We have sufficient data from which the skin-resistance [of a ship's hull] can be determined. 1894 Aeronautics 1 163/2 Langley's experiments show that the friction of the air or ‘skin resistance’ is so small it may be neglected. 1895 H. Lamb Hydrodynamics xi. 575 The frictional or ‘skin-resistance’ experienced by a solid of ‘easy’ shape moving through a liquid. 1912 Times 21 Aug. 15/6 To afford skin resistance directly proportionate to mass only..the thickness of the Titanic plating should have been 4in. instead of 1in. 1933 Science 20 Oct. 350/1 Of the three types or forms of drag mentioned, that due to friction or skin resistance, so called, finds its explanation..in the need for constantly supplying the energy required to maintain the eddying turbulent boundary layer. 2001 K. J. Rawson & E. C. Tupper Basic Ship Theory (ed. 5) II. x. 415 Investigation..led Froude to postulate that a 3 per cent decrease in skin resistance for every 10°F rise in temperature could be adopted as a fair working allowance. 2. The resistance of the skin (skin n. 12e) of an electrical conductor. Cf. skin effect n. at skin n. Compounds 5. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > specific resistance resistivity1885 skin resistance1891 specific resistance1899 skin resistance1900 specific resistivity1958 1891 Jrnl. Inst. Electr. Engineers 20 479 When we deal with conductors of about a centimetre in diameter there is no apparent effect of this skin resistance. 1902 Encycl. Brit. XXXIII. 217/1 The resistance of the sea to Hertzian waves in ‘wireless telegraphy’ comes under the same principles, and may be calculated by the same formula as the skin resistance of wires. 1998 A. I. Pressman Switching Power Supply Design (ed. 2) vii. 299 High skin resistance at these higher-frequency Fourier components of even a 25-kHz rectangular current waveform makes skin effect a concern even for a low-frequency 25 kHz switcher. 3. The electrical resistance of the skin of a person or animal; (as a count noun) a measurement of this. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > specific resistance resistivity1885 skin resistance1891 specific resistance1899 skin resistance1900 specific resistivity1958 1900 Lancet 10 Mar. 697/1 Salt or soda may be added to the water to reduce the skin resistance. 1942 S. R. Hathaway Physiol. Psychol. xi. 236 The level of skin resistance has a low inverse correlation with neuroticism. 1971 Jrnl. Gen. Psychol. 85 88 Each record was analyzed by recording the averaged skin resistances for the last two minutes of the resting period and for each minute of the stimulus film period. 1997 B. Rowlands Which? Guide Complementary Med. 189 This deep rest leads to the production of alpha brainwaves and changes in muscle tone and skin resistance. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022). < n.1855 |
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