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You searched on: Author: theodore vorburger

Displaying records 21 to 30 of 204 records.
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21. Striation Density for Predicting the Identifiability of Fired Bullets
Published: 9/1/2010
Authors: Wei Chu, Jun-Feng Song, Theodore Vincent Vorburger, Susan M Ballou
Abstract: Without a selection procedure to exclude the bullets having insufficient individualized ballistics signature, automated ballistics identification systems will correlate an evidence bullet with all reference bullets stored in the database. Correlation ...

22. Subpixel Image Stitching for Linewidth Measurement Based on Digital Image Correlation
Published: 8/13/2010
Authors: Wei Chu, Joseph Fu, Theodore Vincent Vorburger

23. Topography measurements for correlations of standard cartridge cases
Published: 7/1/2010
Authors: Theodore Vincent Vorburger, Jun-Feng Song, Wei Chu, Thomas B Renegar, Xiaoyu A Zheng, James H Yen, Robert Meryln Thompson, Richard M Silver, Benjamin Bachrach, Martin Ols
Abstract: NIST Standard Reference Materials (SRM) 2460 Standard Bullets and 2461 Standard Cartridge Cases are intended for use as check standards for crime laboratories to help verify that their computerized optical imaging equipment for ballistics image acqui ...

24. Interlaboratory Comparison of Traceable Atomic Force Microscope Pitch Measurements
Published: 6/14/2010
Authors: Ronald G Dixson, Donald Chernoff, Shihua Wang, Theodore Vincent Vorburger, Ndubuisi George Orji, Siew-Leng Tan, Joseph Fu
Abstract: The National Institute of Standards and Technology (NIST), Advanced Surface Microscopy (ASM), and the National Metrology Centre (NMC) of the Agency for Science, Technology, and Research (A*STAR) in Singapore have undertaken a three-way interlaborator ...

25. Introduction to Surface Finish Metrology
Published: 6/14/2010
Author: Theodore Vincent Vorburger
Abstract: We discuss the range of methods available to measure surface finish and emphasize the methods of stylus profiling and various types of optical profiling. Documentary standards for measurement of surface texture and comparisons between methods are al ...

26. Optimal Compression and Binarization of Signature Profiles for Automated Bullet Identification Systems
Published: 5/1/2010
Authors: Wei Chu, Jun-Feng Song, Theodore Vincent Vorburger, Robert Meryln Thompson, Thomas B Renegar, Richard M Silver

27. 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 ...

28. Calibration of 1 nm SiC Step Height Standards
Published: 3/31/2010
Authors: Theodore Vincent Vorburger, Albert M. Hilton, Ronald G Dixson, Ndubuisi George Orji, J. A. Powell, A. J. Trunek, P. G. Neudeck, P. B. Abel
Abstract: We aim to develop and calibrate a set of step height standards to meet the range of steps useful for nanotechnology. Of particular interest to this community is the calibration of atomic force microscopes operating at their highest levels of magnifi ...

29. Pilot Study of Automated Bullet Signature Identification Based on Topography Measurements and Correlations
Published: 3/1/2010
Authors: Wei Chu, Jun-Feng Song, Theodore Vincent Vorburger, James H Yen, Susan M Ballou, Benjamin Bachrach
Abstract: A procedure for automated bullet signature identification is described based on topography measurements using confocal microscope and correlations calculation. Automated search and retrieval systems are widely used for comparison of firearms evidence ...

30. Three steps towards metrological traceability for ballistics signature measurements
Published: 2/1/2010
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Robert Meryln Thompson, Thomas B Renegar, Xiaoyu A Zheng, Li Ma, James H Yen, Martin Ols
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 casings. NIST and ATF are propos ...

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  • 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