Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publications Portal

You searched on: Author: michael moldover

Displaying records 81 to 90 of 116 records.
Resort by: Date / Title

81. The Effect of Vibrational Relaxation of the Discharge Coefficient of Critical Flow Venturis
Published: 12/1/2000
Authors: Aaron N Johnson, John D Wright, Shin-ichi Nakao, C L Merkle, Michael R Moldover
Abstract: This paper identifies a new mechanism that can affect the discharge coefficient of critical nozzle flows. Specifically, vibrational relaxation effects are demonstrated to significantly influence the discharge coefficient of selected gases in critical ...

82. Ab Initio Values of the Thermophysical Properties of Helium as Standards
Series: Journal of Research (NIST JRES)
Published: 9/1/2000
Authors: John J. Hurly, Michael R Moldover
Abstract: Recent quantum mechanical calculations of the interaction energy of pairs of helium atoms are accurate and some include reliable estimates of their uncertainty. We combined these recent ab initio results with earlier published results to obtain a he ...

83. An Improved Greenspan Acoustic Viscometer
Published: 9/1/2000
Authors: J Wilhelm, Keith A Gillis, J B. Mehl, Michael R Moldover
Abstract: We improved the Greenspan acoustic viscometer (double Helmholtz resonator) to measure the viscosity of gases at temperatures from 250 K to 400 K and at pressures up to 3.4 MPa. In anticipation of handling corrosive gases, all wetted parts of the app ...

84. Toroidal Cross-Capacitor for Measuring the Dielectric Constant of Gases
Published: 7/1/2000
Authors: T J. Buckley, J O. Hamelin, Michael R Moldover
Abstract: We describe toroidal cross capacitors built to accurately measure the dielectric constant of gases. We tested the capacitors by measuring the dielectric polarizability of helium and argon at 7 and 50 degrees C at pressures up to 3 MPa. For helium, ...

85. Thermodynamic Properties of Sulfur Hexafluoride
Published: 5/1/2000
Authors: John J. Hurly, Dana R Defibaugh, Michael R Moldover
Abstract: We present new vapor phase speed-of-sound data u(P,T), new Burnett density-pressure-temperature data {rho}(P,T), and a few vapor pressure measurements for sulfur hexafluoride (SF^d6^). The speed-of-sound data spanned the temperature range 230 K {le ...

86. Primary Acoustic Thermometry for Use Up to 800 K
Published: 12/1/1999
Authors: Dean C Ripple, Dana R Defibaugh, Keith A Gillis, Michael R Moldover

87. Thermodynamic Temperatures of the Triple Points of Mercury and Gallium and in the Interval 217 to 303 K
Series: Journal of Research (NIST JRES)
Report Number: N/A
Published: 12/1/1999
Authors: Michael R Moldover, S J. Boyes, Christopher W Meyer, A R. Goodwin

88. Thermophysical Properties of Process Gases
Published: 11/1/1999
Authors: John J. Hurly, Michael R Moldover
Abstract: We measured the speed of sound in the process gases Cl^d2^, HBr, BCl^d3^, and in the surrogate gases SF^d6^, CF^d4^, and C^d2^F^d6^. The data range up to 475 K (200 C) and from 25 kPa to 1500 kPa (or to 80% of the vapor pressure for condensable gas ...

89. Frequency-Dependent Viscosity of Xenon Near the Critical Point
Published: 10/1/1999
Authors: Robert F Berg, Michael R Moldover, G A Zimmerli
Abstract: We used a novel, overdamped oscillator aboard the Space Shuttle to measure the viscosity {eta} of xenon near its critical density {rho}^dc^ and temperature T^dc^. In microgravity, useful data were obtained within 0.1 mK of T^dc^, corresponding to a ...

90. Electrostriction of Near-Critical SF^d6^ in Microgravity
Published: 6/1/1999
Authors: G A Zimmerli, R A Wilkinson, R A Ferrell, Michael R Moldover
Abstract: We used interferometry to measure the electric-field-induced (I.e., electrostrictive) increase of the density of sulfur hexafluoride near its critical point. The results at the temperatures T^dc^ + 5 mK, T^dc^ + 10 mK, and T^dc^ + 30 mK, with T^dc^ ...

Search NIST-wide:

(Search abstract and keywords)

Last Name:
First Name:

Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series