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NIST Authors in Bold

Displaying 50101 - 50125 of 73868

Simultaneous Optimization of Linear and Nonlinear Microwave Response of YBCO Films

June 1, 1999
Author(s)
James Booth, James A. Beall, David A. Rudman, Leila R. Vale, Ronald H. Ono, Christopher L. Holloway, S. B. Qadri, M. S. Osofsky, E. F. Skelton, J. H. Claasen, G. Gibson, J. L. MacManus-Driscoll, N. Malde, L. F. Cohen
We present results of a systematic study of the effect of film deposition temperture on both the linear and nonlinear response of super-conducting Yba 2Cu 3O7-γ^ (YBCO) thin films and devices at microwave frequencies. Measurements of the unpatterned films

Software to Optimize the Testing of Mixed-Signal Devices

June 1, 1999
Author(s)
Gerard N. Stenbakken, Andrew D. Koffman, T. M. Souders
New software is now available to help test and measurement engineers optimize the testing of complex electronic devices. Examples of products that are benefiting from this software range from A/D and D/A converters to multi-range precision instruments. The

Standard Reference Materials: Tin Freezing-Point Standard - SRM 741a

June 1, 1999
Author(s)
Gregory F. Strouse, N P. Moiseeva
The freezing point of tin (231.928 degrees C) is a defining fixed point of the International Temperature Scale of 1990 (ITS-90). Realization of this freezing point is performed using a fixed-point cell containing high-purity ({> or =} 99.9999 % pure) tin

Substrate Specificity of Deinococcus Radiodurans Fpg Protein

June 1, 1999
Author(s)
K. J. Tuerk, C Bauche, J Laval, M. Dizdaroglu
A DNA repair enzyme has recently been isolated from the ionizing radiation-resistant bacterium Deinococcus radiodurans (Bauche, C. and Laval, J. (1999) J. Bacteriol. 181, 262-269). This enzyme is a homologe of the Fpg protein of Escherichia coli. We

Superconducting Thin-Film Transformers at Microwave Frequencies

June 1, 1999
Author(s)
A. H. Miklich, J. X. Przybysz, T. J. Smith, Samuel Benz, Todd E. Harvey
We describe the use of thin-film superconducting transformers at frequencies up to 20 GHz. Transformers with turns ratios of 2,3, and 7 were fabricated out of Nb and tested in a liquid-He Dewar. The measured S-parameters showed considerably less bandwidth

Supporting Manufacturing Process Analysis and Trouble Shooting with ACTS

June 1, 1999
Author(s)
Michelle P. Steves, Wo L. Chang, Amy Knutilla
This paper presents a prototype tool called ACTS (Annotation Collaboration Tool via SMIL), which was designed to meet the user requirements of a distributed, collaborative team performing remote analysis of robotic welds. ACTS is a web-based collaboration

Symposium on Computer-Supported Cooperative Work

June 1, 1999
Author(s)
Kevin L. Mills
IComputer-supported cooperative work (CSCW) holds great importance and promise for modern society. This paper provides an overview of seventeen papers comprising a symposium on CSCW. The overviewI also discusses some relationships among the contributions

Telepresence: A New Paradigm for Industrial and Scientific Collaboration

June 1, 1999
Author(s)
Michael T. Postek, Marylyn H. Bennett, N J. Zaluzec
A portion of the mission of the National Institute of Standards and Technology (NIST) Manufacturing Engineering Laboratory (MEL) is to improve and advance length metrology in aid of U.S. industry. The successful development of a Collaboratory for

Telepresence: A New Paradigm for Industrial and Scientific Collaboration

June 1, 1999
Author(s)
Michael T. Postek, Marylyn H. Bennett, N J. Zaluzec
The successful development of a collaboratory for Telepresence Microscopy (TPM) provides an important new tool to promote technology transfer in the areas of measurement technology. NIST and Texas Instruments (TI), under the auspices of the National

The DLMF Project: A New Initiative in Classical Special Functions

June 1, 1999
Author(s)
Daniel W. Lozier
NIST (formerly, National Bureau of Standards) has started an ambitious project that aims to produce a successor to Abramowitz and Stegun's {\em Handbook of Mathematical Functions}, published by the National Bureau of Standards in 1964 and reprinted by

The Fallacy of Monitoring Surge Voltages: SPDs and PCs Galore

June 1, 1999
Author(s)
A. Mansoor, K. O. Phipps, Francois D. Martzloff
To support the recommendation of shifting transient monitoring from voltage surges to current surges, the paper presents experimental results as well as numerical modeling results demonstrating two mechanisms causing an apparent decrease of surge activity

The Infrared Spectra of (NO) + 2 , (NO) - 2 , and (NO) - 3 Trapped in Solid Neon

June 1, 1999
Author(s)
C Lugez, Warren E. Thompson, Marilyn E. Jacox, A Snis, I Panas
New studies of the infrared spectra of the products which result on codeposition at approximately 5 K of a Ne:NO sample with Ne atoms that have been excited in a microwave discharge have led to new and revised assignments for several ionic species. The

Thermal Conductivity of Two Compositions of Yttria-Stabilized Zirconia

June 1, 1999
Author(s)
Andrew J. Slifka, Bernard J. Filla, Judith K. Stalick
The thermal conductivities of two different compositions of yttria-stabilized zirconia have been measured using an absolute, steady-state method. The measurements were made in a one-dised guarded-hot-plate apparatus from 130 C to 950 C. one material has a

Time-Resolved Line Focus Acoustic Microscopy of Composites

June 1, 1999
Author(s)
Nelson N. Hsu
Acoustic microscopy has been used to measure material properties since the 1980s. The velocity of the leaky surface wave can be accurately determined from the V(z) curve which is formed by the interference between the leaky surface wave and specular

Toward Nanometer Accuracy Measurements

June 1, 1999
Author(s)
John A. Kramar, E Amatucci, David E. Gilsinn, Jay S. Jun, William B. Penzes, Fredric Scire, E C. Teague, John S. Villarrubia
We at NIST are building a metrology instrument called the Molecular Measuring Machine (MMM) with the goal of performing 2D point-to-point measurements with one nanometer accuracy cover a 50 mm by 50 mm area. The instrument combines a scanning tunneling

Triangulation-Based L 1 -fitting of Terrain Surfaces

June 1, 1999
Author(s)
Javier Bernal, Christoph J. Witzgall
Given a planar triangulation, the goal is to select elevations at its vertices so that resulting piecewise-linear triangulated surface approximates specified elevations using the L 1-norm as the primary measure-of-fit. Several suboptimal algorithms
Displaying 50101 - 50125 of 73868
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