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NIST Authors in Bold

Displaying 13651 - 13675 of 17285

Probe-Force Calibration Experiments Using the NIST Electrostatic Force Balance

January 1, 2003
Author(s)
Jon R. Pratt, David B. Newell, John A. Kramar, J Mulholland, Eric P. Whitenton
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 weighing

A Bose-Einstein Condensate in an Optical Lattice

July 1, 2002
Author(s)
J Denschlag, J E. Simsarian, H Heffner, C R. McKenzie, A Browaeys, D Cho, Kristian Helmerson, S L. Rolston, William D. Phillips
We have performed a number of experiments with a Bose-Einstein condensate (BEC) in a one dimensional optical lattice. Making use of the small momentum spread of a BEC and standard atom optics techniques a high level of coherent control over an artifical

Speed of Sound as a Thermodynamic Property of Fluids

September 15, 2001
Author(s)
Daniel G. Friend
In this chapter, we review the principles of sound propagation in fluid systems. From a study of the hydrodynamic equations, sound propagation is shown to be a wave phenomenon. The speed of sound then can be derieved at any state point from a knowledge of

The Art and Science of Lamp Photometry

August 1, 2001
Author(s)
R S. Bergman, Yoshi Ohno
This paper first overviews photometric quantities of lamps - luminous flux, luminous intensity, illuminance, and luminance - and general techniques for measurement of these quantities to characterize lamps. The total luminous flux of lamps (in lumens) is

Bayesian Approach to Combining Results From Multiple Methods

January 1, 2001
Author(s)
Hung-Kung Liu, Nien F. Zhang
Many solutions to the problem of estimating the consensus mean from the results of multiple methods or laboratories have been proposed. In a Bayesian analysis, the consensus mean is specified through probabilistic dependency as either a ¿parent¿ or a

MSIDs Continuous Improvement Activities

January 1, 2001
Author(s)
Sharon J. Kemmerer, Kristy D. Thompson
… improvement projects internal to the National Institute of Standards and Technology (NIST), Manufacturing Engineering …

Pulse-Driven Josephson Digital/Analog Converter

June 1, 1998
Author(s)
Samuel Benz, Clark A. Hamilton, Charles J. Burroughs, Todd E. Harvey, Laurie Christian, J. X. Przybysz
We have designed and demonstrated a pulse-driven Josephson digital/analog converter. When used as a programmable voltage standard, this device can synthesize metrologically accurate ac waveforms as well as stable dc voltages. We show through simulations

SGML on the WEB: A Tale of Two Sites

December 1, 1997
Author(s)
Joshua Lubell
Business and organizations are increasingly finding that HTML (Hyper-Text Markup Language) offers no help whatsoever in managing the information on their web sites. SGML (Standard Generalized Markup Language) provides the flexibility and reuse lacking in

Test Fire Signatures and the Fire-Emulator/Detector-Evaluation (NISTIR 6030)

June 1, 1997
Author(s)
William L. Grosshandler, Thomas G. Cleary
Existing methods for evaluating the performance of smoke and thermal detectors are reviewed. The levels of combustion gases, smoke, temperature and velocity likely to be produced in the European standard detector test fires are discussed, and this
Displaying 13651 - 13675 of 17285
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