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Author: john kramar

Displaying records 31 to 40 of 56 records.
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31. Dependence of Morphology on Miscut Angle for Si(111) Etched in NH(4)F
Published: 5/1/2003
Authors: S Gonda, Joseph Fu, John A Kramar, Richard M Silver, Hui Zhou
Abstract: Using scanning probe microscopy, we have examined the surfaces produced by etching several different vicinal Si(111) samples in NH(4)F aqueous solution. In agreement with others, we found that deoxygenation of the etchant generally reduces the number ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822425

32. 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

33. 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

34. 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

35. 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

36. 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

37. A Flexure Balance With Adjustable Restoring Torque for Nanonewton Force Measurement
Published: 1/1/2002
Authors: Jon Robert Pratt, David B Newell, John A Kramar
Abstract: The NIST electrostatic force balance compares mechanical probe forces to an SI realization of force derived from measurements of the capacitance gradient and voltage in an electronic null balance. As we approach the nanonewton regime, the finite stif ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822422

38. NIST Electrostatic Force Balance Experiment
Published: 1/1/2002
Authors: John A Kramar, David B Newell, Jon Robert Pratt
Abstract: We have designed and built a prototype electrostatic force balance for realizing forces in the micronewton range. The active electrodes are concentric cylinders, the outer serving as the reference and the inner suspended and guided by a rectilinear f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821769

39. SI Traceability of Force at the Nanonewton Level
Published: 7/1/2001
Authors: David B Newell, Jon Robert Pratt, John A Kramar, Douglas T Smith, L. A. Feeney, Edwin Ross Williams
Abstract: Although nanonewton force measurements are commonplace in industry, no National Measurement Institute supports a link to the International System of Units (SI) below one newton. The National Institute of Standards and Technology has launched a five- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=7241

40. Towards a Traceable Nanoscale Force Standard
Published: 5/1/2001
Authors: Jon Robert Pratt, David B Newell, Edwin Ross Williams, Douglas T Smith, John A Kramar
Abstract: The National Institute of Standards and Technology has launched a five-year project to traceably link the International System of Units (SI) to forces between 10^u-8^N and 10^u-2^N. In this paper, we give a background and overview of this project, di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821765



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