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Displaying 47301 - 47325 of 73697

The Effect of Suggested Changes to the Rockwell Hardness Test Method

September 1, 2000
Author(s)
Samuel R. Low III, David J. Pitchure, C D. Flanigan
In the latest revision of the ISO Rockwell hardness test standard (ISO/FDIS 6508(E), 1999), the introductory paragraphs introduce changes to the test practice; one new to this revision, and one suggested as a possibility for the next revision. The change

The Ternary Eutectic of Sn-Ag-Cu Solder Alloys

September 1, 2000
Author(s)
Kil-Won Moon, William J. Boettinger, Ursula R. Kattner, Frank S. Biancaniello, C A. Handwerker
New measurements using precision thermal analysis and existing experimental data for the Sn-Ag-Cu system are summarized. For Sn-Ag-Cu alloys, the location of the ternary eutectic involving L, Sn, Ag3Sn, and Cu6Sn5 phases in the Sn-rich corner is of

The Trilogy Update of IEEE Std. C62.41

September 1, 2000
Author(s)
Francois D. Martzloff
Progress report on the restructuring of two IEEE standards concerned with surges in low-voltage a.c. power circuits into a Trilogy of three documents. First a basic Guide describes the surge environment, then a Recommended Practice proposes a limited set

Waveguide Atom Beam Splitter for Laser-Cooled Neutral Atoms

September 1, 2000
Author(s)
D Muller, Eric A. Cornell, M Prevedelli, P Schwindt, A A. Zozulya, D Z. Anderson
A laser-cooled neutral-atom beam from a low-velocity intense source is split into two beams while it is guided by a magnetic-field potential. We generate our multimode beam-splitter potential with two current-carrying wires upon a glass substrate combined

XML Technologies

September 1, 2000
Author(s)
Mary C. Brady, Carmelo Montanez-Rivera, Richard M. Rivello, Lisa J. Carnahan
An Internet language called the Extensible Markup Language (XML) is rapidly becoming one of the most popular languages in the world. XML is being incorporated into many Internet Web pages and applications; it is particularly useful for those involving

Meeting the Metrology Needs of the Microdisplay Industry

August 31, 2000
Author(s)
Paul A. Boynton, Edward F. Kelley, John M. Libert
Measuring the optical characteristics of microdisplays produce challenges to traditional display metrology. When using light-measuring devices to measure scenes having high contrasts or wide color variations, they suffer the effects of veiling glare or

Nanotechnology for Next-Generation Josephson Voltage Standards

August 30, 2000
Author(s)
Samuel P. Benz, Paul D. Dresselhaus, Charles J. Burroughs
We have developed two voltage standard systems: the programmable Josephson voltage standard and the Josephson arbitrary waveform synthesizer. The programmable system is fully automated and provides stable programmable DC voltages from -1.2 V to +1.2 V. The

Features of Intelligence Required by Unmanned Ground Vehicles

August 16, 2000
Author(s)
James S. Albus
A definition of intelligence is given in terms of performance that can be quantitatively measured. Behaviors required of unmanned ground vehicles are described and computational requirements for intelligent control at seven hierarchical levels in a

Web Usability Logging: Tools and Formats

August 15, 2000
Author(s)
John V. Cugini
Systematic usability studies of web-based applications require software tools and data standards to support both the capture and representation of users' activities. Web logging tools can be based within the browser, the website, or the underlyingserver

Low Harmonic Distortion in a Josephson Arbitrary Waveform Synthesizer

August 14, 2000
Author(s)
Samuel P. Benz, Charles J. Burroughs, Paul D. Dresselhaus
The use of broadband integrated filters has enabled practical operating margins for ac waveforms synthesized from the perfectly quantized voltage pulses of Josephson junction arrays. This improvement enabled the digital synthesis of arbitrary waveforms
Displaying 47301 - 47325 of 73697
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