Institution
National Physical Laboratory
Facility•London, United Kingdom•
About: National Physical Laboratory is a facility organization based out in London, United Kingdom. It is known for research contribution in the topics: Dielectric & Thin film. The organization has 7615 authors who have published 13327 publications receiving 319381 citations.
Papers published on a yearly basis
Papers
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15 Apr 1998-Philosophical transactions - Royal Society. Mathematical, physical and engineering sciences
TL;DR: Thermocapillary forces were shown to play a part in the problems of ‘off–centre welding’, ‘porosity’ and ‘arc wander’ in GTA/TIG welding in the surface rippling of welds.
Abstract: The problem of it variable weld penetration or casttocast variation in GTA/TIG welding is discussed. It is shown that for normal GTA/TIG welding conditions the HeipleRoper theory is valid, i.e. tha...
250 citations
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249 citations
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TL;DR: A review of large-scale engineering metrology since the 1978 report of Puttock is given in this article, where techniques for high-accuracy straightness measurement, precision leveling and absolute distance metrology are described, together with approaches to compensation for the effects of atmospheric refraction.
248 citations
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TL;DR: In this article, a new electrical-substitution absolute radiometer operating at 5 K, based on a standard commercial helium cryostat, which has been developed at NPL for optical radiant power measurements, is described.
Abstract: The adoption in 1979 of a new definition of the candela, which permitted a detector-based approach to the realization of the unit, has emphasized the importance of high-accuracy absolute radiation detectors. This paper describes a new electrical-substitution absolute radiometer operating at 5 K, based on a standard commercial helium cryostat, which has been developed at NPL for optical radiant-power measurements. The principal advantages of operating the radiometer at liquid helium temperatures are that the detector can be a large, highly absorbing cavity (absorptivity 99.998%) and that exact equivalence of electrical and radiant heating can be clearly demonstrated. It will be the primary absolute detector for a new realization of the candela at NPL and will provide the basis for the development of a wider range of radiometric and spectroradiometric standards. The use of the radiometer to measure the radiant power of an intensity-stabilized laser source at the milliwatt level with an uncertainty of 4 parts in 105 is also described, together with its application in the determination of the responsivity of transfer-standard detectors, such as silicon photodiodes.
248 citations
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TL;DR: In this article, PANI and polyaniline (PANI)-coated multi-walled carbon nanotubes (MWCNTs) are used for making efficient microwave absorbers.
248 citations
Authors
Showing all 7655 results
Name | H-index | Papers | Citations |
---|---|---|---|
Rajesh Kumar | 149 | 4439 | 140830 |
Akhilesh Pandey | 100 | 529 | 53741 |
A. S. Bell | 90 | 305 | 61177 |
David R. Clarke | 90 | 553 | 36039 |
Praveen Kumar | 88 | 1339 | 35718 |
Richard C. Thompson | 87 | 380 | 45702 |
Xin-She Yang | 85 | 444 | 61136 |
Andrew J. Pollard | 79 | 673 | 26295 |
Krishnendu Chakrabarty | 79 | 996 | 27583 |
Vinod Kumar | 77 | 815 | 26882 |
Bansi D. Malhotra | 75 | 375 | 19419 |
Matthew Hall | 75 | 827 | 24352 |
Sanjay K. Srivastava | 73 | 366 | 15587 |
Michael Jones | 72 | 331 | 18889 |
Sanjay Singh | 71 | 1133 | 22099 |