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Institution

National Physical Laboratory

FacilityLondon, 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
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Journal ArticleDOI
TL;DR: In this paper, power spectral density measurements of the fluctuating component of the drag on square plates in both smooth and turbulent flow are presented, showing the importance of the ratio of turbulence scale to plate size.
Abstract: Measurements on square and circular plates in turbulent flow show the mean base pressure to be considerably lower than that measured in smooth flow. Power spectral density measurements of the fluctuating component of the drag on square plates in both smooth and turbulent flow are presented. The measurements in turbulent flow show the importance of the ratio of turbulence scale to plate size. There is shown to be a strong correlation between the fluctuating drag force and the velocity fluctuations in the approaching flow. The distortion of the turbulence structure approaching a plate is also discussed.

139 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that the 3d holes created by Sr 2+ substitution are itinerant both above and below T C, which can be explained on the basis of itinerant-electron ferromagnetism.
Abstract: Mossbauer and other studies establish that in La 1-x Sr x CoO 3 (x>0.125), ferromagnetic Sr 2+ -rich clusters coexist with paramagnetic La 3+ -rich regions in the same crystallographic phase, with the ferromagnetic component increasing with increasing x and decreasing T. The 3d holes created by Sr 2+ substitution are itinerant both above and below T C . All the experimental observations on this system can be explained on the basis of itinerant-electron ferromagnetism.

139 citations

Journal ArticleDOI
TL;DR: In this article, a survey of data compliations for surface analysis is presented, focusing on the provision of numerical values for use in calculations of quantitative surface analysis, providing unbiased data for the development of theory, and establishing a benchmark to judge the value of current research.
Abstract: Data compliations are an integral and vital part of the development of the measurement scheme for surface analysis. They have three main functions that will be considered in this survey: (i) the provision of numerical values for use in calculations of quantitative surface analysis, (ii) the provision of unbiased data for the development of theory, and (iii) the establishment of a benchmark to judge the value of current research. A brief review will be made of practical data relating to AES and XPS instruments; electron guns, x-ray sources, spectrometers and detectors. Next, data compilations of experimental measurements of relative sensitivity factors, attenuation lengths and backscattering factors will be contrasted. Finally, theoretically derived data banks of cross sections, inelastic mean free paths, asymmetry parameters, etc will be considered and conclusions drawn of the need for further work.

139 citations

Journal ArticleDOI
TL;DR: Biosensors offer exciting opportunities for numerous decentralized clinical applications, ranging from emergency room screening, home self testing and alternative site testing, continuous and real-time in vivo monitoring.

139 citations

Journal ArticleDOI
TL;DR: The variability of the global gamma index (γ) analysis in various commercial IMRT/VMAT QA systems and the impact of measurement with low resolution detector arrays on γ indicates that the detector array configuration and resolution have greater impact on the experimental calculation of γ due to under-sampling of the dose distribution, blurring effects, noise, or a combination.

139 citations


Authors

Showing all 7655 results

NameH-indexPapersCitations
Rajesh Kumar1494439140830
Akhilesh Pandey10052953741
A. S. Bell9030561177
David R. Clarke9055336039
Praveen Kumar88133935718
Richard C. Thompson8738045702
Xin-She Yang8544461136
Andrew J. Pollard7967326295
Krishnendu Chakrabarty7999627583
Vinod Kumar7781526882
Bansi D. Malhotra7537519419
Matthew Hall7582724352
Sanjay K. Srivastava7336615587
Michael Jones7233118889
Sanjay Singh71113322099
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202315
202242
2021356
2020438
2019434
2018406