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Author: craig shakarji

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11. Evaluating Coordinate Measuring Machine Software Geometry Uncertainties Using National and International Standards
Published: 1/1/2004
Authors: Craig M Shakarji, J D Raffaldi
Abstract: In coordinate metrology, evaluating task specific measurement uncertainty can be difficult, a problem which prompted the current development of several related standards at the national and international levels. Software that processes coordinate dat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822115

12. Reference Algorithms for Chebyshev and One-Sided Data Fitting for Coordinate Metrology
Published: 1/1/2004
Author: Craig M Shakarji
Abstract: This paper describes reference algorithms developed at the National Institute of Standards and Technology that fit geometric shapes to data sets according to Chebyshev, maximum -inscribed, and minimum - circumscribed criteria. Using an improved appro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822103

13. Spot Weld Analysis with Two-Dimensional Ultrasonic Arrays
Published: 1/1/2004
Authors: D A Denisov, Craig M Shakarji, R G Maev, J M Paille, B B Lawford
Abstract: This paper describes a threefold method of testing the performance of an array-based ultrasonic tool for nondestructive testing of spot welds. The tool is described in its capabilities, use, and advantages over existing counterparts. Performance test ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822114

14. Evaluation of One- and Two-Sided Geometric Fitting Algorithms in Industrial Software
Published: 9/1/2003
Author: Craig M Shakarji
Abstract: Recent work in testing and comparing maximum-inscribed, minimum-circumscribed, and minimum-zone (Chebyshev) fitting algorithms indicates that serious problems can exist in present commercial software packages for coordinate measuring machines. Effort ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822081

15. Should You Be Concerned with Software Measurement Uncertainty?
Published: 8/1/2003
Authors: Craig M Shakarji, J D Raffaldi
Abstract: The contribution of software to the uncertainty of measurements is an important but often overlooked aspect of uncertainty evaluations. In coordinate metrology, software is often relied upon for complicated fitting of data, filtering, calibrations, a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822070

16. Validation of CMM Task Specific Measurement Uncertainity Software
Published: 8/1/2003
Authors: M P Henke, J M Baldwin, K Summerhays, B Rasnick, P Murray, Daniel S Sawyer, Bruce R. Borchardt, Steven David Phillips, Craig M Shakarji
Abstract: Task specific CMM measurement uncertainty statements can be generated using computer (Monte Carlo) simulation. REcently, commercial products using this powerful technique have become available; however they typically involve megabytes of code inacces ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822066

17. The Validation of CMM Task Specific Measurement Uncertainty Software
Published: 1/1/2003
Authors: Steven David Phillips, Bruce R. Borchardt, A Abackerli, Craig M Shakarji, Daniel S Sawyer, P Murray, B Rasnick, K Summerhays, J M Baldwin, M P Henke
Abstract: Task specific CMM measurement uncertainty statements can be generated using computer (Monte Carlo) simulation. Recently, commercial products using this powerful technique have become available; however they typically involve megabytes of code inacces ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822036

18. Information Technology Measurement and Testing Activities at NIST
Published: 2/1/2001
Authors: David W Flater, James E. Fowler, Simon Paul Frechette, Craig M Shakarji, Michael D Hogan, Shirley M. Radack, Douglas C Montgomery, L Johnson, R Rosenthal, R Mccabe, R Carpenter, Lisa J Carnahan, M M Gray
Abstract: Our high technology society continues to rely more and more upon sophisticated measurements, technical standards, and associated testing activities. This was true for the industrial society of the 20th century and remains true for the information soc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821635

19. Information Technology Measurement and Testing Activities at NIST
Series: Journal of Research (NIST JRES)
Published: 1/1/2001
Authors: Michael D Hogan, Lisa J Carnahan, Robert J. Carpenter, David W Flater, James E. Fowler, Simon Paul Frechette, M M Gray, L Arnold Johnson, R. McCabe, Douglas C Montgomery, Shirley M. Radack, R Rosenthal, Craig M Shakarji
Abstract: Our high technology society continues to rely more and more upon sophisticated measurements, technical standards, and associated testing activities. This was true for the industrial society of the 20th century and remains true for the information so ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150696

20. Least-Squares Fitting Algorithms of the NIST Algorithm Testing System
Published: 12/1/1998
Author: Craig M Shakarji
Abstract: This report describes algorithms for fitting certain curves and surfaces to points in three dimensions. All fits are based on orthogonal distance regression. The algorithms were developed as reference software for the NIST Algorithm Testing System, w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821955



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