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You searched on: Author: jolene splett

Displaying records 11 to 20 of 37 records.
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11. A Comparison of Methods for Computing the Residual Resistivity Ratio of High-Purity Niobium
Published: 2/17/2011
Authors: Jolene D Splett, Dominic F. (Dominic F.) Vecchia, Loren Frederick Goodrich
Abstract: We compare methods for estimating the residual resistivity ratio (RRR) of high-purity niobium samples and investigate the effects of using different functional models on the final value. RRR is typically defined as the ratio of the electrical resista ...

12. Use of Electronic Calibration Units for Vector-Network-Analyzer Verification
Published: 7/30/2010
Authors: Dylan F Williams, Arkadiusz C. Lewandowski, Denis X. LeGolvan, Ronald A Ginley, Chih-Ming Wang, Jolene D Splett
Abstract: We present measurements indicating that electronic calibration units are stable enough to be used in place of mechanical vector-network-analyzer verification artifacts. This enables a new fully automated approach to verifying microwave vector-network ...

13. Influence of Ti and Ta doping on the irreversible strain limit of ternary Nb^d3^Sn superconducting wires made by the restacked-rod process
Published: 4/1/2010
Authors: Najib Cheggour, Loren Frederick Goodrich, Theodore C Stauffer, Jolene D Splett, Xifeng Lu, A. K. Ghosh, G. Ambrosio
Abstract: Nb^d3^Sn superconducting wires made with restacked-rod process (RRP®) were found to have a dramatically improved resilience to axial tensile strain when alloyed with Ti as compared to Ta. Whereas Ta-alloyed Nb^d3^Sn in RRP wires showed permanent dama ...

14. Frequentist coverage properties of uncertainty intervals for weak Poisson signals in the presence of background
Published: 2/3/2010
Authors: Kevin J Coakley, Jolene D Splett, David S Simons
Abstract: We construct uncertainty intervals for weak Poisson signals in the presence of background. We consider the case where a primary experiment yields a realization of the signal plus background, and a second experiment yields a realization of the bac ...

15. Charpy Machine Verification: Limits and Uncertainty
Series: Special Publication (NIST SP)
Published: 9/1/2008
Authors: Jolene D Splett, Christopher N McCowan, Chih-Ming Wang
Abstract: The purpose of this document is to clarify some issues pertaining to uncertainty statements and the ASTM E 23 limits used in the Charpy machine verification program. We explain some of the distributional subtleties associated with uncertainty and ult ...

16. A Liquid Density Standard Over Wide Ranges of Temperature and Pressure Based on Toluene
Series: Journal of Research (NIST JRES)
Published: 2/1/2008
Authors: Mark O McLinden, Jolene D Splett
Abstract: The density of liquid toluene has been measured over the temperature range -60 {degree}C to 200 {degree}C with pressures up to 36 MPa. A two-sinker hydrostatic-balance densimeter utilizing a magnetic suspension coupling provides an absolute determina ...

17. Dynamic Force Measurement: Instrumented Charpy Impact Testing
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6652
Published: 1/1/2008
Authors: Christopher N McCowan, Jolene D Splett, E. Lucon
Abstract: The maximum forces measured by the machines in this round robin are in good agreement. This general result shows that the static force calibration of instrumented strikers is quite robust, and that the various striker designs evaluated here performed ...

18. NIST Recommended Practice Guide: Computing Uncertainty for Charpy Impact Machine Test Results
Series: Special Publication (NIST SP)
Published: 9/1/2007
Authors: Jolene D Splett, Christopher N McCowan, Hariharan K Iyer, Chih-Ming Wang
Abstract: The purpose of this recommended practice guide is to demonstrate how to determine the uncertainty associated with mean absorbed energy of specimens tested on a Charpy impact machine. We assume that the Charpy machine has successfully met the requirem ...

19. An Empirical Model for the Warm-Up Drift of a Commercial Harmonic Phase Standard
Published: 6/1/2007
Authors: Jeffrey A Jargon, Jolene D Splett, Dominic F. (Dominic F.) Vecchia, Donald C. DeGroot
Abstract: We develop an empirical model for the warm-up drift in a harmonic phase standard used to calibrate the phase distortion of a nonlinear vector network analyzer. The model enables us to estimate the time at which the standard reaches stability.

20. Current Ripple Effect on n-Value
Published: 6/1/2007
Authors: Loren Frederick Goodrich, Jolene D Splett
Abstract: We studied the systematic effect of current ripple on the determination of n-value, which is the index of the shape of the electric field-current (E-I) curve. Commercial Nb^d3^Sn wires were measured with controlled amounts of ac ripple. Substitution- ...

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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