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Author: jun-feng song

Displaying records 91 to 100 of 124 records.
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91. NIST Random Profile Roughness Specimens and Standard Bullets
Published: 1/1/2000
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Robert A. Clary, Michael L McGlauflin, Eric Paul Whitenton, Christopher J. Evans
Abstract: Based on the numerical controlled (NC) diamond turning process used previously for manufacturing random profile roughness specimens, two prototype standard bullets were developed at the National Institute of Standards and Technology (NIST). These sta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820982

92. Project Report (1998-99) of NIST Standard Bullets and Casings (National Institute of Standards and Technology, Gaithersburg, MD)
Published: 1/1/2000
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: Abstract not available.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901995

93. Rockwell Hardness - A Method-Dependent Standard Reference Material
Published: 7/1/1999
Authors: Samuel Rea Low III, R J. Gettings, Walter S Liggett Jr, Jun-Feng Song
Abstract: Rockwell hardness is not a fundamental physical property of a material. It is a method-dependent measurement of the deformation of the material to an applied force. There are no alternative measurement systems to directly or independently measure R ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852924

94. Rockwell Hardness - A Method-Dependent Standards Reference Material
Published: 7/1/1999
Authors: Samuel Rea Low III, R Gettings, Walter S Liggett Jr, Jun-Feng Song
Abstract: Rockwell hardness is a method-dependent measurement of the deformation of a material in response to an applied force. It is not a fundamental physical property of a material. There are no alternative measurement systems to directly or independently m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820937

95. Assessment Error Sources in Rockwell Hardness Measurements
Published: 6/1/1999
Authors: Walter S Liggett Jr, Samuel Rea Low III, David J Pitchure, Jun-Feng Song
Abstract: In the use of hardness test blocks, the uncertainty due to block non-uniformity can be reduced if one is willing to make measurements at specified locations on the blocks. Statistical methods for achieving this reduction are explained in this paper. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820936

96. Measurement Traceability to NIST Standard Rockwell Diamond Indenters
Published: 6/1/1999
Author: Jun-Feng Song
Abstract: A metrology-based Rockwell hardness scale is established by a standard machine and a standard diamond indenter. Both must be established through force and dimensional metrology with acceptably small measurement uncertainties. In 1994, NIST developed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820949

97. High Accuracy High Speed Gaussian Filter in Surface Metrology
Published: 5/31/1999
Authors: Y B Yuan, Jun-Feng Song, Theodore Vincent Vorburger
Abstract: Both (1+x^2)^(-n) and (sin x/x)^n functions are very close to the Gaussian distribution for large value of n. Based on these functions, two new algorithms are developed for designing high accuracy and high speed recursive type Gaussian digital filter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820955

98. NIST Microform Calibration - How Does It Benefit U.S. Industry?
Published: 10/1/1998
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: In microform metrology, complex 3-D surface features in the micrometer range must be quantified for their space and size including dimensions, curves, angles, profile deviations, and alignment errors, as well as surface roughness with measurement unc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823109

99. NIST Virtual/Physical Random Profile Roughness Calibration Standards
Published: 10/1/1998
Authors: Jun-Feng Song, Christopher J. Evans, Michael L McGlauflin, Eric Paul Whitenton, Theodore Vincent Vorburger, Y B Yuan
Abstract: The NIST (National Institute of Standards and Technology) virtual/physical surface roughness calibration standard consists of physical specimens whose surfaces are manufactured by a numerically controlled diamond-turning process using digitized profi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820910

100. Tip Characterization for Scanned Probe Microscope Width Metrology
Published: 3/1/1998
Authors: Samuel Dongmo, John S Villarrubia, Samuel N Jones, Thomas B Renegar, Michael T Postek, Jun-Feng Song
Abstract: Determination of the tip shape is an important prerequisite for converting the various scanning probe microscopies form imaging tools into dimensional metrology tools with sufficient accuracy to meet the critical dimension measurement requirements of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823092



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