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Topic Area: Metrology

Displaying records 51 to 60 of 835 records.
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51. Embedded Capacitive Displacement Sensor for Nanopositioning Applications
Topic: Metrology
Published: 8/17/2010
Authors: Svetlana Avramov-Zamurovic1, Nicholas G Dagalakis, Rae Duk Lee, Yong Sik Kim, Jae Myung Yoo, Seung Ho Yang
Abstract: The scale of nano objects requires very precise position determination. The state-of-the-art manipulators involve accurate nanometer positioning. This paper presents the design of a capacitive displacement sensor for a nanopositioning application. Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906019

52. Choosing test positions for laser tracker evaluation and future Standards development
Topic: Metrology
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

53. High-voltage Nanoimprint Lithography of Refractory Metal Film
Topic: Metrology
Published: 7/1/2010
Authors: John A. Dagata, Natalia Farkas, R Ramsier
Abstract: Local oxidation of metal, semiconductor, and polymer surfaces has provided a common basis from which to explore fundamental principles of nanolithography and prototype functional nanostructures for many years now. This article summarizes an investiga ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824748

54. Cylindrical Acoustic Resonator for the Re-determination of the Boltzmann Constant
Topic: Metrology
Published: 6/1/2010
Authors: J.T. Zhang, H. Lin, X.J. Feng, Keith A Gillis, Michael R Moldover
Abstract: We describe progress towards re-determining the Boltzmann constant {I}k{/I}^dB^ using two fixed-path, gas-filled, cylindrical, acoustic cavity resonators. The longitudinal acoustic resonance modes of a cylindrical cavity have lower quality factors {I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905511

55. Feasibility of an Accurate Dynamic Standard for Water Flow
Topic: Metrology
Published: 6/1/2010
Authors: Iosif I Shinder, Michael R Moldover
Abstract: We used NIST's primary water flow standard to study the feasibility of accurately determining mass flow rates {I}m{/I}^ddot^ of water "dynamically," that is from the time derivative of the weight {I}W{/I} of the collection tank: {I}m{/I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832344

56. The Limits and Extensibility of Optical Patterned Defect Inspection
Topic: Metrology
Published: 4/1/2010
Authors: Richard M Silver, Bryan M Barnes, Martin Yeungjoon Sohn, Richard Quintanilha, Hui Zhou, Chris Deeb, Mark Johnson, Milton Goodwin, Dilip Patel
Abstract: New techniques recently developed at the National Institute of Standards and Technology using bright field optical tools are applied to signal-based defect analysis of features with dimensions well below the measurement wavelength. A key to this app ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905318

57. Accurate Stochastic Simulations Using Graphics Hardware: Nanoassembly With the Optical Tweezers
Topic: Metrology
Published: 3/1/2010
Authors: Arvind Kumar Balijepalli, Thomas W LeBrun, Satyandra K. Gupta
Abstract: Significant speedup is possible when using the Graphics Processing Unit (GPU) for stochastic particle simulations. A simulation of freely diffusing spherical particles using Langevin's equation has been developed and the results from the CPU an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823243

58. Pilot Study of Automated Bullet Signature Identification Based on Topography Measurements and Correlations
Topic: Metrology
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824708

59. Three steps towards metrological traceability for ballistics signature measurements
Topic: Metrology
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901492

60. DYNAMIC PERCEPTION WORKSHOP REPORT: Requirements and Standards for Advanced Manufacturing
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7664
Topic: Metrology
Published: 1/14/2010
Authors: Tsai Hong Hong, Elena R Messina, Hui-Min Huang, Michael O Shneier, Roger Diack Eastman, Jane Shi, James Wells
Abstract: The Dynamic Perception workshop was intended to further the development of standardized, reproducible, and portable test methods that can advance the technology of sensors and perception systems for new, flexible robotic and automation applications i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904612