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1. An Iterative Algorithm for Calculating Stylus Radius Unambiguously
Published: 9/24/2011
Authors: Theodore Vincent Vorburger, Xiaoyu A Zheng, Thomas B Renegar, Jun-Feng Song, Li Ma
Abstract: The stylus radius is an important specification for stylus instruments and is commonly provided by instrument manufacturers. However, it is difficult to measure the stylus radius unambiguously. Accurate profiles of the stylus tip may be obtained by ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907724

2. Applications of Cross-Correlation Functions
Published: 4/14/2010
Authors: Theodore Vincent Vorburger, Jun-Feng Song, Wei Chu, Li Ma, Xiaoyu A Zheng, Thomas B Renegar, Son H Bui
Abstract: We describe several examples where we use cross-correlation functions to quantify the similarity of 2D surface profiles or of 3D surface topography images. The applications have included 1) the manufacture of Standard Reference Material (SRM) bullet ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902481

3. Applications of Profile Filtering in the Dimensional Metrology of Fuel Cell Plates
Published: 5/14/2013
Authors: Balasubramanian Muralikrishnan, Wei Ren, Eric S Stanfield, Dennis S Everett, Xiaoyu A Zheng, Theodore D Doiron
Abstract: We describe the application of several surface profile filters as an enabling tool in the dimensional measurements of an engineering artifact, namely, a fuel cell plate. We recently reported work on the development of a non-contact system for dimensi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913301

4. 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

5. Confocal Microscopy Analysis of Breech Face Marks on Fired Cartridge Cases from Ten Consecutively Manufactured Pistol Slides
Published: 7/1/2012
Authors: Xiaoyu A Zheng, Robert Meryln Thompson, Todd Weller
Abstract: Ten (10) pistol slides with consecutively manufactured breech faces, were obtained from Sturm, Ruger Co, Inc. A total of nine (9) test fires from each pistol, for a total of ninety (90) test fired cartridge cases, were compared using comparison micr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906690

6. 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

7. Development of Ballistics Identification – From Image Comparison to Topography Measurement in Surface Metrology-
Published: 3/22/2012
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Robert Meryln Thompson, Thomas B Renegar, Xiaoyu A Zheng, James H Yen, Richard M Silver, Wei Chu
Abstract: Fired bullets and ejected cartridge cases have unique ballistics signatures left by the firearm. By analyzing the ballistics signatures, forensic examiners can trace these bullets and cartridge cases to the firearm used in a crime scene. Current au ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908043

8. GEOMETRICAL MEASUREMENTS OF NIST SRM ROCKWELL HARDNESS DIAMOND INDENTERS
Published: 11/21/2010
Authors: Jun-Feng Song, Samuel Rea Low III, Xiaoyu A Zheng
Abstract: The geometric parameters of 28 candidate Standard Reference Material (SRM) Rockwell hardness diamond indenters are calibrated by an automated system recently developed at the National Institute of Standards and Technology (NIST). The calibration res ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906117

9. NIST Microform Calibration System for Rockwell Hardness Standardization
Published: 8/25/2008
Authors: Jun-Feng Song, Samuel Rea Low III, Xiaoyu A Zheng
Abstract: In the uncertainty budget of Rockwell hardness tests, microform geometric errors of the diamond indenter are a major contributor. The microform calibration of Rockwell diamond indenters has been one of the key steps for Rockwell hardness standardiza ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824621

10. NIST SRM (Standard Reference Material) 2460/2461 Standard Bullets and Casings Project
Published: 10/13/2009
Authors: Jun-Feng Song, Thomas B Renegar, Xiaoyu A Zheng, Robert Meryln Thompson, Richard M Silver, Martin M Ols, Ted T Vorburger
Abstract: The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 Bullets and 2461 Cartridge Cases. NIST has also d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903625