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Author: johannes soons
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1. 2D and 3D Topography Comparisons of Toolmarks Produced from Consecutively Manufactured Chisels and Punches.
Published: 5/20/2014
Authors: Xiaoyu A Zheng, Johannes A Soons, Robert Meryln Thompson, John Villanova, Taher Kakal
Abstract: A 2009 report by the National Academies [1] recommended strengthening the scientific basis of procedures and criteria employed by the forensic science specialty of toolmark identification. The current method of comparison and determination of ide ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914887

2. A Novel Cooling System to Reduce Thermally-Induced Errors of Machine Tools
Published: 6/14/2007
Authors: M. Alkan Donmez, Mahn-Hee Hahn, Johannes A Soons
Abstract: This study explores a method to reduce thermally-induced errors of machine tools through temperature stabilization with compressed air. The method uses inexpensive, specialy-shaped, silicon tubing wth small silts. Compressed air forced through such ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822722

3. A Simple Ball Averager for Reference Sphere Calibrations
Published: 1/1/2005
Authors: Ulf Griesmann, Quandou Wang, Johannes A Soons, Remi Carakos
Abstract: When measuring the form errors of precision optics with an interferometer, the calibration of the reference wavefront is of central importance.  Ball averaging, or random ball testing, has in recent years emerged as a robust method for calibrati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822303

4. Absolute interferometric tests of spherical surfaces based on rotational and translational shears
Published: 9/13/2012
Authors: Johannes A Soons, Ulf Griesmann
Abstract: Traceability of interferometric form measurements requires characterization of the reference wavefront. We investigate absolute tests for spherical surfaces where the form errors of both reference and test surface are estimated by minimizing the diff ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911749

5. Accessing the Performance of Model-Based Control in a Distributed Machine Tool Control Environment
Published: 10/2/2004
Authors: John L Michaloski, Johannes A Soons, Frederick M Proctor
Abstract: Although Computerized Numerical Controller (CNC) machine tools have greatlyimproved precision, quality and productivity, there are still many areaswhere inaccuracies and inef- ficiencies remain. Model-Based Control (MBC) isa technique to advance mach ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823505

6. Analysis of the Step-Diagonal Test
Published: 6/1/2005
Author: Johannes A Soons
Abstract: The step-diagonal test modifies the diagonal displacement test for machine tool performance evaluation by executing a diagonal as a sequence of single-axis motions.  The proposed modification has gained interest because of the claim that the obt ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822286

7. Applications of Surface Metrology in Firearm Identification
Published: 1/8/2014
Authors: Xiaoyu A Zheng, Johannes A Soons, Theodore Vincent Vorburger, Jun-Feng Song, Thomas B Renegar, Robert Meryln Thompson
Abstract: Surface metrology is commonly used to characterize functional engineering surfaces. The technologies developed offer opportunities to improve forensic toolmark identification. Toolmarks are created when a tool comes into contact with a surface an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914401

8. Applications of Surface Metrology in Toolmark Identification
Published: 1/8/2014
Authors: Xiaoyu A Zheng, Johannes A Soons, Theodore Vincent Vorburger, Jun-Feng Song, Thomas B Renegar, Robert Meryln Thompson
Abstract: Surface metrology is commonly used to characterize functional engineering surfaces. The technologies developed offer opportunities to improve forensic toolmark identification. In 2009, a report by the National Academies called into question, amon ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913337

9. Characterization of Precision Spheres With XCALIBIR
Published: 1/1/2004
Authors: Ulf Griesmann, Johannes A Soons, Quandou Wang
Abstract: The geometry of a nearly spherical surface, for example that of a precision optic, is completely determined by the radius-of-curvature at one point and the deviation from the perfect spherical form at all other points of the sphere. Measurements of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822216

10. Comparison of Measurement Procedures for Evaluating Thermal Errors of Machine Tools due to Moving Linear Axes
Published: 6/1/2005
Authors: Michael L McGlauflin, Johannes A Soons, M. Alkan Donmez
Abstract: This paper investigates an alternative method to assess thermal errors due to the heat generated by moving linear axes using a spindle-mounted probe and simple artifacts.  The angular errors introduced by the warm-up of individual axes (X, Y and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821996



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