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Author: jun-feng song

Displaying records 31 to 40 of 124 records.
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31. Comparison of Optical and Stylus Methods for Measurement of Rough Surfaces
Published: 1/1/2007
Authors: Theodore Vincent Vorburger, H G Rhee, Thomas B Renegar, Jun-Feng Song, Xiaoyu A Zheng
Abstract: Abstract Optical methods are increasingly used for measurement of surface texture, particularly for areal measurements where the optical methods are generally faster. A new Working Group under Technical Committee (TC) 213 in the International Organiz ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824605

32. NIST Standard Bullets and Casings Project
Published: 1/1/2007
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Susan M Ballou, Thomas B Renegar, Li Ma, Eric Paul Whitenton, David R Kelley, Robert A. Clary, A Zheng, M Ols
Abstract: The National INstitute of Standards and Technology (NIST) standard bullets and casings project will provide support to firearm examiners and to the National Integrated Ballistics Information Network (NIBIN) in the United States. The standard bullet i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822141

33. Tolerancing Form Deviations for NIST Standard Reference Material (SRM) 2809 Rockwell Diamond Indenters
Published: 1/1/2007
Authors: Jun-Feng Song, Samuel Rea Low III, Li Ma
Abstract: The National Institute of Standards and technology (NIST) plans to develop Standard Reference Material (SRM) 2809 Rockwell Diamond Indenter to support Rockwell hardness standardization.  Most tolerances of the SRM indenters are adopted from thos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823240

34. Verifying Measurement Uncertainty Using a Control Chart With Dynamic Control Limits
Published: 1/1/2007
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: We propose a control chart with dynamic control limits that promotes the process of developing and refining an uncertainty budget and verifying the measurement uncertainty. The upper and lower dynamic control limits, µ +2s and µ - 2s, are ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824602

35. Calibration Reproductibility Test for NIST's No. 3581 Standard Rockwell Diamond Indenter
Published: 1/1/2006
Authors: Jun-Feng Song, Samuel Rea Low III, A Zheng
Abstract: Standard Rockwell diamond indenter plays an important role for a worldwide unified Rockwell hardness scale.  In 1994, NIST established a microform calibration system with sufficiently small calibration uncertainty for the calibration of standard ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823202

36. Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques
Published: 1/1/2006
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Thomas B Renegar, Hyug-Gyo Rhee, A Zheng, L Ma, John M Libert, Susan M Ballou, B Bachrach, K Bogart
Abstract: Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a NIST (National Institute of Standards and Te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823187

37. Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques
Published: 1/1/2006
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Thomas B Renegar, Xiaoyu A Zheng, Hyug-Gyo Rhee, John M Libert, Li Ma, K Bogart, Susan M Ballou, B Bachrach
Abstract: Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a National Institute of Standards and Technolo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822359

38. The Effect of Gaussian Filter Long Wavelength Cutoff in Topography Comparisons and Measurements
Published: 1/1/2006
Authors: Jun-Feng Song, Lijun Ma, Theodore Vincent Vorburger
Abstract: Five parameters are used for 2D and 3D topography comparisons and measurements, those include two correlation parameters Ds and CCFmax , and three surface parameters: the r-m-s roughness Rq (or Sq for 3D), r-m-s waviness Wq and Gaussian filter long w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823217

39. Topography Measurements and Applications
Published: 1/1/2006
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: Based on auto- and cross-correlation functions (ACF and CCF), a new surface parameter called profile (or topography) difference, Ds, has been developed for quantifying differences between 2D profiles or between 3D topographies with a single number. & ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823205

40. Three-dimensional Scanning Optical Tweezers
Published: 12/5/2005
Authors: Thomas W LeBrun, T W. Hwang, I Y Park, Jun-Feng Song, Yong-Gu Lee, Nicholas G Dagalakis, Cedric Victor Lucien Gagnon, Arvind Kumar Balijepalli
Abstract: There are several new tools for manipulating microscopic objects. Among them, optical tweezers (OT) has two distinguishing advantages. Firstly, OT can easily release an object without the need of a complicated detaching scheme. Secondly, it is antici ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822371



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