Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publications Portal

You searched on: Author: daniel sawyer

Displaying records 21 to 30 of 45 records.
Resort by: Date / Title


21. Measuring Scale Errors in a Laser Tracker s Horizontal Angle Encoder through Simple Length Measurement and Two-face System Tests
Published: 11/1/2010
Authors: Balasubramanian Muralikrishnan, Christopher J Blackburn, Daniel S Sawyer, Steven David Phillips, Robert Bridges, Quan Ma
Abstract: We describe a method to estimate the scale errors in the horizontal angle encoder of a laser tracker in this paper. The method does not require expensive instrumentation such as a rotary stage or even a calibrated artifact. An uncalibrated but stable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904221

22. 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

23. Dimensional Metrology Issues of Army Body Armor Testing
Series: OTHER
Published: 2/18/2010
Authors: Kirk D Rice, Michael A Riley, Amanda Lattam Forster, Steven David Phillips, Craig M Shakarji, Daniel S Sawyer, Christopher J Blackburn, Bruce R. Borchardt, James J Filliben
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904958

24. ASME B89.4.19 Performance Evaluation Tests and Geometric Misalignments in Laser Trackers
Published: 1/30/2009
Authors: Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Bruce R. Borchardt, William Tyler Estler
Abstract: Small and unintended offsets, tilts, and eccentricity of the mechanical and optical components in laser trackers introduce systematic errors in the measured spherical coordinates (angles and range readings), and possibly in the calculated lengths of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824664

25. A Low Cost Fiducial Reference for Computed Tomography
Published: 11/11/2008
Authors: Zachary H Levine, Steven E Grantham, Daniel S Sawyer, Anthony P Reeves, David F Yankelevitz
Abstract: Rationale and Objectives. To detect the growth in lesions, it is necessary to ensure that the apparent changes in size are above the noise floor of the system. By introducing a fiducial reference, it may be possible to detect smaller changes in le ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842437

26. 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

27. Performance Evaluation of Laser Trackers
Published: 9/15/2008
Authors: Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Bruce R. Borchardt, William Tyler Estler
Abstract: The American Society for Mechanical Engineers (ASME) recently released the ASME B89.4.19 Standard [1] on performance evaluation of spherical coordinate instruments such as laser trackers. At the National Institute of Standards and Technology (NIST), ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824702

28. 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

29. 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

30. 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



Search NIST-wide:


(Search abstract and keywords)


Last Name:
First Name:







Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • 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