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Displaying 37926 - 37950 of 74066

Phase Equilibria of Ba-R-Cu-O-F-OH for Coated-Conductor Applications (R=Lanthanides and Y)

August 1, 2004
Author(s)
Winnie K. Wong-Ng, Lawrence P. Cook, Igor Levin, J Suh, Ron Feenstra, T J. Haugan, P. D. Barnes
Phase diagrams of the Ba 2RCu 3O 6+x (R=Nd, Sm, Gd, Y, and Er) superconductors, prepared under 0.1 % 0 2 at 810 C, reflect the trend of the lanthanide contraction. The single-phase regions of Ba 2-x(Nd 1+x-yR y) Cu 3O 6+z for R=Gd, Y and Yb, and Ba 2-x(R 1

Proceedings of the Biometric Consortium Conference 2003, Vol 1, No 2)

August 1, 2004
Author(s)
Fernando L. Podio, J S. Dunn
This document contains the proceedings from the 2003 Biometric Consortium Conference held September 22-24, 2003, in Arlington, Virginia. The conference provides a forum to discuss government and commercial implementations and initiatives and recent

Quantum-Based Microwave Power Measurements: Proof-of-Concept Experiment

August 1, 2004
Author(s)
Thomas P. Crowley, E. A. Donley, T P. Heavner
An initial proof-of-concept experiment to measure microwave power based on quantum-mechanical principles is presented. Ground state cesium atoms exposed to 9.192631770 GHz microwave oscillate between two hyperfine states at a rate that is proportional to

Quantum-Based Microwave Power Measurements: Proof-Of-Concept Experiment

August 1, 2004
Author(s)
Thomas P. Crowley, E. A. Donley, T P. Heavner
An initial proof-of-concept experiment to measure microwave power based on quantum-mechanical principles is presented. Ground state cesium atoms exposed to 9.192631770 GHz microwave oscillate between two hyperfine states at a rate that is proportional to

R-22 Replacement Status

August 1, 2004
Author(s)
J M. Calm, Piotr A. Domanski
The next step in the transition to environmentally safer refrigerants is phase out of R-22. It is the most widely used refrigerant, both in the United States and on a global basis. Its application range in residential, commercial, industrial, and transport

Relativity of Explicit Conceptual Models

August 1, 2004
Author(s)
David W. Flater
Explicit conceptual models are supposed to capture knowledge of lasting value in a reusable form. Reuse of explicit conceptual models is hampered by arbitrary and application-specific constraints; any constraints that conflict with a new application must

Requirements on Information Technology for Product Lifecycle Management

August 1, 2004
Author(s)
Peter O. Denno, T Thurman
Good decision-making is founded on good information. Information technology supporting product lifecycle management ought to provide a high degree of information cohesion and traceability ? knowledge of the interrelations among data, and basis for belief

Standard Reference Material 1751 - A Gallium Melting-Point Standard

August 1, 2004
Author(s)
Gregory F. Strouse
The melting point of gallium %2829%2E7646%B0C%29 is a defining thermometric fixed point of the International Temperature Scale of 1990 %28ITS%2D90%29%2E Realization of this melting point is performed using a fixed%2Dpoint cell containing high%2Dpurity

Statistical Analysis of Key Comparisons with Linear Trends

August 1, 2004
Author(s)
Nien F. Zhang, Hung-Kung Liu, N Sedransk, W Strawderman
A statistical analysis for Key Comparisons with linear trend is proposed. The approach has the advantage that it is consistent with the case in which there is no trend. The uncertainties for KCRV and the degrees of equivalence are also provided. As an

Tackling the Semantic Interoperability of Modern Manufacturing Systems

August 1, 2004
Author(s)
Steven R. Ray
The need for increased precision in information standards coupled with the desire to automate parts of the system integration process has led us to the use of a formal semantic approach to systems integration. This paper provides a brief overview of some

TEM horn antennas: A promising new technology for compliance testing

August 1, 2004
Author(s)
Chriss A. Grosvenor, Robert T. Johnk, David R. Novotny, Seturnino Canales
Abstract-This paper discusses the advantages of using a TEM-horn antenna over conventional EMC antennas such as the log-periodic, hybrids, or biconical antennas. Important issues such as frequency coverage, linearity, time-resolution of events, cost, and

The IEEE Standard on Transitions, Pulses, and Related Waveforms, Std-181-2003

August 1, 2004
Author(s)
Nicholas Paulter, Donald R. Larson, Jerome J. Blair
The IEEE has written a new standard on pulse techniques and definitions to replace the withdrawn standards, IEEE-Std-181-1977 and Std-194-1977. The Std-181-2003 combines information from both of the withdrawn standards. Relative to the withdrawn standards

The Remarkable Metrological History of Radiocarbon Dating [II]

August 1, 2004
Author(s)
Lloyd A. Currie
Radiocarbon dating would not have been possible if 14C had not had the wrong half-life -- a fact that delayed its discovery [1]. Following the discovery of this 5730 year radionuclide in laboratory experiments by Ruben and Kamen, it became clear to W.F

Thermoacoustic Boundary Layers Near the Liquid-Vapor Critical Point

August 1, 2004
Author(s)
Keith A. Gillis, Iosif I. Shinder, Michael R. Moldover
We measure and calculate the sound attenuation within thermoacoustic boundary layers between solid surfaces and xenon at its critical density rc as the reduced temperature t=(T -Tc)/Tc approaches zero. (Tc is the critical temperature.) Using the singular

Wet chemical cleaning of plasma oxide grown on heated (001) InP surfaces

August 1, 2004
Author(s)
Bogdan Lita, O Pluchery, R L. Opila, Y J. Chabal, G. Bunea, J P. Holman, E J. Bekos
Wet chemical cleaning is performed prior to most semiconductor processing steps, including epitaxial growth, metal and dielectric film deposition, and diffusion, with the purpose of removing unwanted chemical species that reside on the wafer surface. In
Displaying 37926 - 37950 of 74066