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Displaying 951 - 975 of 5220

Final report on the key comparison, CCM.PK15 in the pressure rangefrom 1.0 x 10-4 Pa to 1.0 Pa

January 30, 2017

Author(s)

Christian Wuethrich, Hitoshi Akimichi, Mercede Bergoglio, James A. Fedchak, Karl Jousten, Sueng Soo Hong, Jorge T. Guzman

The comparison CCM.M.P-K14 is a key comparison in pressure involving six laboratories in three regional metrological organizations (RMO). The measurand of the comparison is the accommodation coefficient of two spinning rotating gauge characterized in

From Image Tiles to Web-Based Interactive Measurements in One Stop

January 4, 2017

Author(s)

Antoine Vandecreme, Michael P. Majurski, Joe Chalfoun, Keana Scott, John Henry Scott, Mary C. Brady, Peter Bajcsy

This article aims at introducing readers to a web-based solution useful for interactive measurements of centimeter-sized specimens at nanoscales. Modern imaging technology has enabled nanoscale imaging to become a routine process. As the imaging technology

An alternative to the geometric addition method for calculating the rise time of fast oscilloscopes and pulse generations

January 2, 2017

Author(s)

Paul D. Hale, Kai Baaske, Thomas Kleine-Ostmann, Mark Bieler, Thorsten Schrader

In this paper we propose a new method for calculating the rise time of pulse generators and oscilloscopes using a correction factor. This new method is advantageous over the well known geometric rule, also known as the root sum of squares (RSS) rule

Gas-phase broadband spectroscopy using active sources: progress, status, and applications

January 1, 2017

Author(s)

Kevin C. Cossel, Eleanor M. Waxman, Ian A. Finneran, Geoffery A. Blake, Jun Ye, Nathan R. Newbury

Broadband spectroscopy is an invaluable tool for measuring multiple gas-phase species simultaneously. In this work we review current applications for broad-band spectroscopy. We discuss components of broad-band spectroscopy including light sources

Automation of Piston Gauge Calibration Services Phase I Results

December 29, 2016

Author(s)

Katie M. Schlatter, Julia Scherschligt, John S. Quintavalle, Robert G. Driver, Christina D. Cross

This report documents efforts to date to automate Piston Gage Calibration Services. This report includes an overview of the project, results for Phase I Implementation efforts, and a look ahead to Phase II. Phase I Measures and Deliverables are based on

Fire-blocking Performance of Laminated Barrier Fabrics: Cone Calorimetric Characterization

December 29, 2016

Author(s)

Shonali Nazare, William M. Pitts, John R. Shields

The fire blocking performance of barrier fabrics laminated to upholstery materials was investigated. The results are two-fold. The first involves information gathered directly from cone calorimetry tests conducted on foam/fabric composites to better

Fieldable dual-comb spectrometer for high-precision near-infrared spectroscopy spanning 44THz

December 26, 2016

Author(s)

Gar Wing Truong, Eleanor M. Waxman, Kevin C. Cossel, Esther Baumann, Andrew M. Klose, Fabrizio R. Giorgetta, William C. Swann, Nathan R. Newbury, Ian R. Coddington

A scoring metric for multivariate data for reproducibility analysis using chemometric methods

December 23, 2016

Author(s)

David A. Sheen, Werickson Fortunato de Carvalho Rocha, Katrice A. Lippa, Dan Bearden

Process quality control and reproducibility in emerging measurement fields such as metabolomics is normally assured by interlaboratory comparison testing. As a part of this testing process, spectral features from a spectroscopic method such as nuclear

Spectral dependence of carrier lifetimes in silicon for photovoltaic applications

December 21, 2016

Author(s)

John F. Roller, Yu-Tai Li, Mario Dagenais, Behrang H. Hamadani

Charge carrier lifetimes in photovoltaic-grade silicon wafers were measured by a spectral-dependent, quasi-steady-state photoconductance technique. Narrow bandwidth LEDs were used to excite excess charge carriers within the material, and the effective

Certification of New Standard Reference Material 2806b Medium Test Dust in Hydraulic Oil

December 19, 2016

Author(s)

Robert A. Fletcher, Nicholas W. Ritchie, David S. Bright, James J. Filliben, William F. Guthrie

A new material has been certified to become Standard Reference Material (SRM) 2806b - Medium Test Dust in Hydraulic Fluid. SRM 2806b consists of a trace polydisperse, irregularly shaped mineral dust particles suspended in hydraulic fluid. The certified

Introduction to the special issue on small-angle scattering

December 19, 2016

Author(s)

Michael Gradzielski, Andrew J. Allen

This is the foreword for a Special Issue of the Journal of Applied Crystallography on Small-Angle Scattering. This special issue collects together full-length peer-reviewed research papers in association with the 15th International Conference on Small

A microwave interferometer of a the michelson-type to improve the dynamic range of broadband ferromagnetic resonance measurements

December 15, 2016

Author(s)

Eric R. Edwards, Anthony B. Kos, Mathias Weiler, Thomas J. Silva

We present a Michelson-type microwave interferometer for use in ferromagnetic resonance experiments. The interferometer is capable of broadband operation without manual adjustment of phase delay or amplitude attenuation. A prototype of the design shows

NIST HB 105-4, Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures 4. Specifications and Tolerances for Liquefied Petroleum Gas and Anhydrous Ammonia Liquid Volumetric Provers (2016 Ed)

December 14, 2016

Author(s)

Georgia L. Harris, Val R. Miller

These specifications and tolerances are recommended as minimum requirements for standards used by state and local weights and measures officials and others in the regulatory verification of meters used in quantity determination of pressurized liquid

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