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Displaying 10576 - 10600 of 17273

Reference Materials for MS-based Untargeted Metabolomics and Lipidomics: A Review by the Metabolomics Quality Assurance and Quality Control Consortium (mQACC)

April 9, 2022
Author(s)
Katrice Lippa, William Davis, Christina Jones, Tracey Johnston, Juan Aristizabal-Henao, Richard Beger, John Bowden, Corey Broeckling, Chris Beecher, Warwick Dunn, Roberto Flores, Goncalo Gouveia, Thomas Hartung, Matthew Lewis, Ioanna Ntai, Andrew Percy, Dan Raftery, Jinchun Sun, Georgios Theodoridis, Fariba Tayyari, Federico Torta, Candice Ulmer, Baljit Ubhi
Introduction The metabolomics quality assurance and quality control consortium (mQACC) is enabling the identification, development, prioritization and promotion of suitable reference materials (RMs) to be used in quality assurance (QA) and quality control

Extended Data Analysis of Bilateral Comparisons with Air and Natural Gas up to 5 MPa

September 28, 2016
Author(s)
John D. Wright, Bodo Mickan, J-P Vallet, CHUNHUI LI
… the comparisons was to prove the equivalence of reference standards for gas flow using pressurized air and natural gas … functions based on physical understanding of the transfer standards. The paper documents the full equivalence of all … and perhaps give insight on the long term drift of primary standards. …

High Rate Tensile Strength Measurements of Frangible Bullets Using a Kolsky Bar

June 8, 2008
Author(s)
Steven P. Mates, Richard L. Rhorer, Stephen W. Banovic, Eric P. Whitenton, Richard J. Fields
The tensile strength of frangible bullets is measured by a high rate diametral compression test (DCT) performed with a Kolsky Bar. Frangible bullets, meant to disintegrate on impact by brittle failure, also exhibit significant plasticity in compression. As

Development of a Motion Imagery Quality Metric

November 20, 2006
Author(s)
J Irvine, Charles D. Fenimore, D Cannon, Donna Haverkamp, John W. Roberts, S Israel, L Simon, J Miller, A Aviles, Michelle Brennan
The motion imagery community would benefit from the availability of standard measures for assessing image interpretability. The National Imagery Interpretability Rating Scale (NIIRS) has served as a community standard for still imagery, but no comparable

High Rate Tensile Strength Measurements of Frangible Bullets Using a Kolsky Bar

January 1, 2006
Author(s)
S P. Mates, Richard L. Rhorer, S Banovic, Eric P. Whitenton, Richard J. Fields
The tensile strength of frangible bullets is measured by a high rate diametral compression test (DCT) performed with a Kolsky Bar. Frangible bullets, meant to disintegrate on impact by brittle failure, also exhibit significant plasticity in compression. As

Traceable Force Metrology for Micronewton Level Calibration

October 1, 2004
Author(s)
Jon R. Pratt, Richard Seugling
… a capacitance-based load detection scheme. Transfer standards of this nature are primarily envisaged for use as a … approaches for establishing traceable small force standards are currently under investigation at NIST [], PTB …

Earning the Stamp of Approval: How to Achieve Optimal Usability

January 1, 2003
Author(s)
Susan L. Makar
… scientists and engineers at the National Institute of Standards and Technology have relied on it for their research … Its mission is to develop and promote measurements, standards, and technology to enhance productivity, facilitate …

Measurements of the Refractive Indices of MOCVD and HVPE Grown AlGAN Films Using Prism-Coupling Techniques Correlated With Spectroscopic Reflection/Transmission Analysis

January 1, 2003
Author(s)
Norman Sanford, Larry Robins, Albert Davydov, Alexander J. Shapiro, Denis V. Tsvetkov, Vladimir A. Dmitriev, Stacia Keller, Umesh Mishra, Steven P. DenBaars
Waveguide prism-coupling methods were used to measure the ordinary and extraordinary refractive indices of Al xGaN films grown on sapphire substrates by HVPE and MOCVD. Several discrete wavelengths ranging from 442 nm to 1064 nm were used and the results

Ionization Constant of Water

June 10, 2025
Author(s)
Hugues Arcis, Allan Harvey
This is an update of two tables in the CRC Handbook of Chemistry and Physics (for the 106th ed.) to reflect a new standard formulation adopted in 2024 by the International Association for the Properties of Water and Steam (IAPWS).

Bound Electron Nonlinearity Beyond the Ionization Threshold

September 18, 2017
Author(s)
Jared K. Wahlstrand, Sina Zahedpour, H M. Milchberg
Using supercontinuum spectral interferometry, we measure the ionization induced optical phase shift in three noble gases and nitrogen and oxygen. Results largely support the standard model of filamentation.

Optical Lattice Clocks

January 1, 2015
Author(s)
Andrew D. Ludlow, Christopher W. Oates
… briefly describe recent advances in these atomic frequency standards, looking to future work and applications. …
Displaying 10576 - 10600 of 17273
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