Zobrazeno 1 - 10 of 72 pro vyhledávání: '"H Barrell"'
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Media are racist … if you say so
Autor: E. Wa ka Ngobeni, H. Barrell, J. Kindra
Publikováno v: Ecquid Novi: African Journalism Studies. 21:271-273
In this part of the 'Forum section' of this special edition of 'Ecquid Novi' on the media and racism, a number of original short articles, as well as statements and excerpts from publications and Internet authors are published to stimulate further de
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd86fff87a5131ce2b6724bed772d649
https://doi.org/10.1080/02560054.2000.9665874
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4
A toluene-mercury thermo-regulator for room control
Autor: J C Evans, H Barrell
Publikováno v: Journal of Scientific Instruments. 12:281-284
A toluene-mercury thermo-regulator is described which is capable, when operated under suitable conditions, of maintaining the temperature of a room constant within ±0.1°C. over long periods of time.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e918443f064e5bef7950c3f76c8edb47
https://doi.org/10.1088/0950-7671/12/9/302
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5
The refraction and dispersion of air and dispersion of air for the visible spectrum
Autor: H. Barrell, Junr. J. E. Sears
Publikováno v: Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences. 238:1-64
(a) Note on previously recorded values of the refractive index of air.For many centuries astronomers have recognized the effect that the refraction of the earth’s atmosphere has upon observations of the positions of celestial bodies. From the time
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::08b3500fd149caf36b4a1950394e509f
https://doi.org/10.1098/rsta.1939.0004
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7
Determinations of the fundamental standards of length in terms of wave-lengths of light
Autor: W. H. Johnson, Junr. J. E. Sears, H. Barrell
Publikováno v: Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character. 233:143-216
A new apparatus for determining the relationship between wave-lengths of light and the fundamental standards of length has been previously described.* Definitive determinations have now been completed of the lengths of the yard and metre in terms of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff3b6748a415084beb1ef8352aa2a837
https://doi.org/10.1098/rsta.1934.0016
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8
Measuring a Large Displacement by Interferometry
Autor: M J Puttock, H Barrell
Publikováno v: British Journal of Applied Physics. 1:87-91
A modified form of Michelson interferometer is used to calibrate the mechanical displacement system of an adjustable cavity resonator. With this resonator the velocity of propagation of electromagnetic waves has been newly determined, as will be desc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41312efbc1cd49c9400306e1199e1ccf
https://doi.org/10.1088/0508-3443/1/4/302
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A short history of measurement standards at the National Physical Laboratory
Autor: H. Barrell
Publikováno v: Contemporary Physics. 9:205-226
Summary Measurement science has been one of the major interests of the NPL since the creation of the Laboratory in 1900. This article gives a historical review of NPL work on the establishment, maintenance and improvement of the basic standards of me
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c729fb20f14e6b958b8d80d0ee955beb
https://doi.org/10.1080/00107516808204397
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