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Displaying 12326 - 12350 of 17284

Uncertainties in Scaling Factors for ab Initio Vibrational Zero-Point Energies

March 21, 2009
Author(s)
Karl K. Irikura, Russell D. Johnson III, Raghu N. Kacker, Ruediger Kessel
Vibrational zero-point energies (ZPEs) determined from ab initio calculations are often scaled by empirical factors. An empirical scaling factor partially compensates for the effects arising from vibrational anharmonicity and incomplete treatment of

NIST-NRC Comparison of Total Immersion Liquid-in-Glass Thermometers

January 31, 2009
Author(s)
Ken D. Hill, D. J. Gee, Christina D. Cross, Gregory F. Strouse
… thermometers is described in many documentary standards in the fields of environmental testing, material … metrology institutes, including the National Institute of Standards and Technology (NIST) and the National Research …

TOWARDS A TEST METHOD FOR HYDROGEN SENSOR PERFORMANCE

April 2, 2008
Author(s)
Nathan D. Marsh, Thomas G. Cleary
As part of an effort to develop standard test methods for the performance of commercial hydrogen sensors, we employed the Fire Emulator / Detector Evaluator, an instrumented flow system designed to study the response of fire detectors (smoke, heat, gas)

Preliminary Performance Assessment of Commercially-Available Hydrogen Sensors

November 12, 2007
Author(s)
Nathan D. Marsh, Thomas G. Cleary
As part of an effort to develop standard test methods for the performance of commercial hydrogen sensors, we employed the Fire Emulator / Detector Evaluator, an instrumented flow system designed to study the response of fire detectors (smoke, heat, gas)

Crack Tip Opening Angle Optical Measurement Methods in Five Pipeline Steels

October 16, 2007
Author(s)
Philippe P. Darcis, Christopher N. McCowan, H. Windhoff, Joseph D. McColskey, Thomas A. Siewert
Crack tip opening angle (CTOA) is becoming one of the more widely accepted properties for characterizing fully plastic fracture. In fact, it has been recognized as a measure of the resistance of a material to fracture in cases where there is a large degree

Recent Developments of the HLPR Chair

June 15, 2007
Author(s)
Roger V. Bostelman, James S. Albus, Tommy Chang
… (HLPR) Chair, developed at the National Institute of Standards and Technology (NIST) within the Intelligent …

CCQM-K31 Key Comparison: Arsenic in Shellfish

February 1, 2006
Author(s)
Robert R. Greenberg, Elizabeth A. Mackey
A Key Comparison (CCQM-K31) of the determination of arsenic in a marine shellfish (oyster tissue) was conducted under the auspices of the CCQM Inorganic Analysis Working Group as a follow-up to the CCQM-P11 Pilot Study. Arsenic was present at naturally

Information Modeling and Model Implementation

January 1, 2006
Author(s)
Yung-Tsun Lee, Charles R. McLean, Yan Luo
… model has been developed at the National Institute of Standards and Technology (NIST) as a part of system …

Significant papers from the first 50 years of the Boulder Labs

August 16, 2004
Author(s)
Mary E. DeWeese, Margaret Luebs, Heather McCullough
… the Boulder Labs have evolved from the Nation1 Bureau of Standards' Central Radio Propagation Laboratory to today's National Institute of Standards and Technology, National Oceanic and Atmospheric …

Specifying Autonomy Levels for Unmanned Systems: Interim Report

April 16, 2004
Author(s)
Hui-Min Huang, James S. Albus, Elena R. Messina, R C. Wade, W English
The viability of Unmanned Systems as tools is increasingly recognized in many domains. As technology advances, the autonomy on board these systems also advances. In order to evaluate the systems in terms of their levels of autonomy, it is critical to have
Displaying 12326 - 12350 of 17284
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