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Author: craig shakarji

Displaying records 11 to 20 of 27 records.
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11. The NIST 66 m Ball Range A One Dimensional Artifact to test Three Dimensional Imaging Systems
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7725
Published: 11/3/2010
Authors: Bruce R. Borchardt, Craig M Shakarji
Abstract: NIST (the National Institute of Standards and Technology) has instituted a 66 m long range for testing of distance-measuring systems. The range consists of titanium balls mounted along a line on stands at unequal intervals. This paper describes thi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906846

12. Choosing test positions for laser tracker evaluation and future Standards development
Published: 7/15/2010
Authors: Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Craig M Shakarji, Ed Morse, Robert Bridges
Abstract: A working group within the ISO TC 213 committee is developing a draft document [11] for evaluating the performance of laser trackers. The ASME B89.4.19 Standard [1] and the draft VDI/VDE 2617 part 10 [2] describe some useful tests that are incorporat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905959

13. Dimensional measurement traceability of 3D imaging data
Published: 1/19/2009
Authors: Steven David Phillips, Craig M Shakarji, Michael Krystek, K Summerhays
Abstract: This paper discusses the concept of metrological traceability to the SI unit of length, the meter. We describe how metrological traceability is realized, give a recent example of the standardization of laser trackers, and discuss progress and challe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900252

14. Calibration of a Computer Assisted Orthopedic Hip Surgery Phantom
Published: 11/4/2008
Authors: Daniel S Sawyer, Nicholas G Dagalakis, Craig M Shakarji, Yong Sik Kim
Abstract: Orthopedic surgeons have identified a need for calibration artifacts (phantoms) to establish the traceability (to the SI unit of length) of measurements performed with Computer Assisted Orthopedic Surgery (CAOS) systems. These phantoms must be light ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824707

15. Development of Tools for Measuring the Performance of Computer Assisted Orthopaedic Hip Surgery Systems
Published: 12/28/2007
Authors: Nicholas G Dagalakis, Yong Sik Kim, Daniel S Sawyer, Craig M Shakarji
Abstract: In the late seventies a sensor was invented, which could track the movement of athlete body parts.  In the early eighties an improved version of this sensor was introduced, by a group of NIST researchers, for the calibration and the performance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823612

16. NIST Medical Phantom Device to Assist With the Calibration and Performance Testing of CAOS Systems
Published: 11/9/2007
Authors: Nicholas G Dagalakis, James B Stiehl, Yong Sik Kim, Daniel S Sawyer, Craig M Shakarji
Abstract: According to expert othopaedic surgeons there is need for medical phantom devices with dimensional metrology traceable to national standards metrology organizations in order to confirm basic Computer Assisted Orthopaedic Surgery (CAOS) systems perfor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823625

17. Design and Fabrication of an Operating Room Computer Assisted Orthopaedic Hip Surgery Artifact
Published: 8/17/2007
Authors: Nicholas G Dagalakis, Yong Sik Kim, Daniel S Sawyer, Craig M Shakarji
Abstract: Hundreds of thousands of joint arthroplasty operations are performed throughout the world every year providing life saving relief from pain and return of mobility to the majority of the individuals who have this treatment. Clinical studies have show ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823614

18. 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

19. 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

20. 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



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