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You searched on: Author: michael moldover

Displaying records 61 to 70 of 116 records.
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61. Comment on Molecular Dynamics Simulations of a Fluid Near Its Critical Point
Published: 2/1/2005
Authors: Jan V. Sengers, Michael R Moldover
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830912

62. Quasi-Spherical Cavity Resonators for Metrology Based on the Relative Dielectric Permittivity of Gases
Published: 10/1/2004
Authors: E May, Laurent Pitre, J B. Mehl, Michael R Moldover, James W Schmidt
Abstract: We evaluate a quasi-spherical, copper, microwave cavity resonator for accurately measuring the relative dielectric permittivity {epsilon^dr^(p,T)} of helium and argon. In a simple, crude approximation the cavity s shape is a triaxial ellipsoid with a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830894

63. Thermoacoustic Boundary Layers Near the Liquid-Vapor Critical Point
Published: 8/1/2004
Authors: Keith A Gillis, Iosif I Shinder, Michael R Moldover
Abstract: We measure and calculate the sound attenuation within thermoacoustic boundary layers between solid surfaces and xenon at its critical density rc as the reduced temperature t=(T -Tc)/Tc approaches zero. (Tc is the critical temperature.) Using the sin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830870

64. Gas Flowmeter Calibrations with the 34 L and 677 L PVTt Standards
Series: Special Publication (NIST SP)
Published: 6/23/2004
Authors: John D Wright, Aaron N Johnson, Michael R Moldover, Gina M Kline
Abstract: This document provides a description of the 34 L and 677 L pressure, volume, temperature, and time (PVTt) primary gas flow standards operated by the National Institute of Standards and Technology (NIST) Fluid Flow Group. These facilities are used to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830866

65. Designing Quasi-Spherical Resonators for Acoustic Thermometry
Published: 6/1/2004
Authors: J B. Mehl, Michael R Moldover, J Pitre
Abstract: We describe a quasi-spherical, noble-gas-filled cavity designed to determine the thermodynamic temperature of the gas from measurements of the frequencies and the half-widths of microwave and acoustic resonances in the cavity. The quasi-spherical sh ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830879

66. The Viscosity of Seven Gases Measured with a Greenspan Viscometer
Published: 11/1/2003
Authors: John J. Hurly, Keith A Gillis, J B. Mehl, Michael R Moldover
Abstract: We determined the viscosity of seven gases (Ar, CH4, C3H8, N2, SF6, CF4, C2F6) by interpreting frequency-response data from a Greenspan acoustic viscometer with a detailed model developed by Gillis, Mehl, and Moldover. The model contains a paramete ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830829

67. Volumetric Gas Flow Standard with Uncertainty of 0.02% to 0.05%
Published: 11/1/2003
Authors: John D Wright, Michael R Moldover, Aaron N Johnson, A Mizuno
Abstract: A new pressure, volume, temperature, and time (PVTt) primary gas flow standard for calibrating flowmeters has an expanded uncertainty (k = 2) of between 0.02% and 0.05%. The standard diverts a steady flow into a collection tank of known volume durin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830814

68. Comment On 'General Principles for the Definition of the Base Units in the SI'
Published: 10/1/2003
Authors: Michael R Moldover, Dean C Ripple
Abstract: Recently, Kose et al. proposed general principles that should guide any future discussions regarding the redefinition of the SI base units and they illustrated their principles with an example of a revised SI. Part of their example (redefinition o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830852

69. Progress in Primary Acoustic Thermometry at NIST: 273 K to 505 K
Published: 9/1/2003
Authors: Gregory F Strouse, Dana R Defibaugh, Michael R Moldover, Dean C Ripple
Abstract: The NIST Acoustic Thermometer determines the thermodynamic temperature by measuring the speed of sound of argon in a spherical cavity. We obtained the thermodynamic temperature of three fixed points on the Interna-tionalTemperature Scale of 1990: the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830838

70. Techniques for Primary Acoustic Thermometry to 800 K
Published: 9/1/2003
Authors: Dean C Ripple, Dana R Defibaugh, Michael R Moldover, Gregory F Strouse
Abstract: The NIST Primary Acoustic Thermometer will measure the difference between the International TemperatureScale of 1990 and the Kelvin Thermodynamic Scale throughout the range 273 K to 800 K with uncertainties of only afew millikelvins. The acoustic the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830839



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