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Author: james schmidt

Displaying records 11 to 20 of 21 records.
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11. IUPAC Experimental Thermodynamics Volume VI: Measurement of the Thermodynamic Properties of Single Phases: CH. 3 Pressure; b) Piston Gauges
Published: 12/1/2002
Authors: Charles D Ehrlich, James W Schmidt
Abstract: The last twenty five years have seen significant advances in the technology and theoretical models associated with the use of piston gauges for the measurement of both pneumatic and hydraulic pressure. Most notably, the incorporation of computers an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830212

12. Characterization of a Controlled-Clearance Piston Gauge Using the Heydemann-Welch Model
Published: 8/1/2002
Authors: T Kobata, James W Schmidt, Douglas A Olson
Abstract: A study on the characterization of a controlled-clearance piston gauge was performed at the National Institute of Standards and Technology (NIST). The characterization covers the pressure range from 37.5 MPa to 288 MPa, at jacket pressures up to 76 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830784

13. NCSL Pressure Comparison At 0.69 Mpa (100 psi) and 1.4 Mpa (200 psi)
Published: 7/1/2000
Authors: Robert G Driver, James W Schmidt
Abstract: The pressure and Vacuum Group at NIST has piloted a pressure comparison under the auspices of the Measurement comparison program committee for the NCSL. A 1.4 MPa (~200 psi)transducer package used as a transfer standard was circulated among 20 domes ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830692

14. A Model for Drag Forces in the Crevice of Piston Gages in the Viscous and Molecular Flow Regimes
Published: 6/1/1999
Authors: James W Schmidt, Charles D Ehrlich, S A Tison
Abstract: A model for drag forces in the crevice of pneumatic piston gages is presented. The model uses an interpolation function for momentum transfer between the piston and the cylinder mediated by the gas flowing in the crevice. The interpolation function ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830639

15. A primary pressure standard at 100 kPa
Published: 6/1/1999
Authors: James W Schmidt, Y Q Cen, Robert G Driver, Walter J. Bowers Jr., J C. Houck, S A Tison, Charles D Ehrlich
Abstract: Primary pressure standards in the atmospheric pressure range are often established using mercury manometers. To a lesser extent controlled-clearance dead-weight testers in which one component (normally the piston) has been dimensionally measured hav ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830636

16. Research at High Pressure
Published: 12/1/1997
Authors: James W Schmidt, S A Tison, D B Ward
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100320

17. Thermodynamic Properties of HFC-338mccq, CF^d3^-CF^d2^-CF^d2^-CH^d26F,1,1,1,2,2,3,3,4-Octafluorobutane
Published: 12/1/1997
Authors: Dana R Defibaugh, E Carrillo-nava, John J. Hurly, Michael R Moldover, James W Schmidt, L A. Weber
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100412

18. Equation of State and Ideal-Gas Heat Capacity of a Gaseous Mixture of 1,1,1,2-Tetrafluoroethane, Pentafluoroethane, and Difluoromethane
Published: 5/1/1997
Authors: John J. Hurly, James W Schmidt, Keith A Gillis
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100431

19. Virial Equation of State of Helium, Xenon, and Helium Xenon Mixtures from Speed-of-Sound and Burnett P{rho}T Measurements
Published: 5/1/1997
Authors: John J. Hurly, James W Schmidt, S J. Boyes, Michael R Moldover
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100432

20. CCM Key Comparison in the Pressure Range 0.05 MPa to 1 MPa (Gas Medium, Gauge Mode) - Phase A1: Dimensional Measurements and Calculation of Effective Area
Published: Date unknown
Authors: G F Molinar, B Rebaglia, A Sacconi, J C Legras, G P Vailleau, James W Schmidt, John Richard Stoup, D R Flack, W Sabuga, O Jusko
Abstract: The results obtained by five laboratories in the determination of the effective areas of two gas-operated 10 cm^u2^ piston-cylinder assemblies from dimensional measurements carried out as part, called phase A1, of a key comparison in the pressure ran ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830638



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