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Author: jon pratt

Displaying records 51 to 60 of 82 records.
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51. Progress Towards Systeme International d'Unites Traceable Force Metrology for Nanomechanics
Published: 1/1/2004
Authors: Jon Robert Pratt, Douglas T Smith, David B Newell, John A Kramar, Eric Paul Whitenton
Abstract: Recent experiments with the National Institute of Standards and Technology (NIST) Electrostatic Force Balance (EFB) have achieved agreement between an electrostatic force and a gravitational force of 10^(-5) N to within a few hundred pN/¿N. This resu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822394

52. Calibration of Piezoresistive Cantilever Force Sensors Using the NIST Electrostatic Force Balance
Published: 11/16/2003
Authors: Jon Robert Pratt, David B Newell, John A Kramar, Eric Paul Whitenton
Abstract: The characterization of material properties and mechanical performance of micro-electromechanical devices often hinges on the accurate measurement of small forces.  Calibrated load cells of appropriate size and range are used, but are often not ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823316

53. The NIST Microforce Realization and Measurement Project
Published: 4/1/2003
Authors: David B Newell, Edwin Ross Williams, John A Kramar, Jon Robert Pratt, Douglas T Smith
Abstract: The National Institute of Standards and Technology (NIST) has launched a five-year Micro-force Realization and Measurement project focusing on the development of an instrument and laboratory capable of realizing and measuring the SI unit of force bel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822085

54. Microforce and Instrumented Indentation Research at the National Institute of Standards and Technology, Gaithersburg, MD
Published: 1/1/2003
Authors: Jon Robert Pratt, David B Newell, John A Kramar, Douglas T Smith
Abstract: This paper provides an overview of recent efforts at the National Institute of Standards and TEchnology to develop metrology and standards to support general users of instrumented indentation and scan-probe devices. Research directed towards a primar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821956

55. Probe-Force Calibration Experiments Using the NIST Electrostatic Force Balance
Published: 1/1/2003
Authors: Jon Robert Pratt, David B Newell, John A Kramar, J Mulholland, Eric Paul Whitenton
Abstract: The sensitivity of a piezoresistive cantilever force sensor has been determined by probing the weighing pan of the NIST prototype electrostatic force balance. In this experiment, micronewton contact forces between a force probe and the balance''s wei ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821900

56. Compact Force Sensors for Low-Force Mechanical Probe Calibration
Published: 9/1/2002
Authors: Jon Robert Pratt, Douglas T Smith, S Woody
Abstract: The loading mechanisms of instrumented indentation machines are often calibrated using deadweights. In many cases, due to the geometry of the loading frame, the applied deadweight is tensile, while the indentation leads to be measured are compressive ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821945

57. Compact Force Sensors for Low-Force Mechanical Probe Calibration
Published: 6/1/2002
Authors: Douglas T Smith, S Woody, Jon Robert Pratt
Abstract: The loading mechanisms of instrumented indentation machines are often calibrated using deadweights. In many cases, due to the geometry of the loading frame, the applied deadweight is tensile, while the indentation leads to be measured are compressiv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850645

58. The NIST Microforce Realization and Measurement Project
Published: 6/1/2002
Authors: David B Newell, Jon Robert Pratt, John A Kramar, Douglas T Smith, Edwin Ross Williams
Abstract: The National Institute of Standards and Technology (NIST) has launched a five-year Micro-force Realization and Measurement project focusing on the development of an instrument and laboratory capable of realizing and measuring the SI unit of force bel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30081

59. The NIST Microforce Realization and Measurement Project
Published: 6/1/2002
Authors: David B Newell, Jon Robert Pratt, John A Kramar, Douglas T Smith, Edwin Ross Williams
Abstract: The National Institute of Standards and Technology (NIST) has launched a five-year Microforce Realization and Measurement project focusing on the development of an instrument and laboratory capable of realizing and measuring the SI unit of force belo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=20316

60. Regenerative Stability Analysis of Highly Interrupted Machining
Published: 5/1/2002
Authors: Matthew A. Davies, Jon Robert Pratt, Brian S. Dutterer, Timothy J Burns
Abstract: We discuss theoretical and experimental work that supports the use of very low radia immersion in the high-speed milling of difficult-to-machine materials, such as titanium alloys. Our theory is based upon modeling the cutting process by a kicked ha ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823351



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