U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 52351 - 52375 of 74191

An Automated Apparatus for Measuring Sound Speeds in Hazardous Gases

June 1, 1998
Author(s)
John J. Hurly
Our laboratory has developed an automated apparatus for measuring the sound speed in hazardous gases such as those used in processing semiconductors. The sound speed (P,T) is deduced from measurements of the acoustic resonance frequencies of a gas-filled

An Equilibrium and Calorimetric Study of Some Transamination Reactions

June 1, 1998
Author(s)
Yadu D. Tewari, N Kishore, Robert N. Goldberg, T N. Luong
Apparent equilibrium constants and calorimetric enthalpies of reaction have been measured for the following enzyme-catalyzed biochemical reactions at the temperature 298.15 k:l-alanine(aq) + 2-oxoglutarate(aq) = pyruvate(aq) + L-glutamate(aq); L-tyrosine

Characterization of On-Wafer Diode Noise Sources

June 1, 1998
Author(s)
James P. Randa, Dave K. Walker, Lawrence P. Dunleavy, Robert L. Billinger, John Rice
A set of wafer probeable diode noise source transfer standards are characterized using on-wafer noise temperature methods developed recently at the National Institute of Standards and Technology (NIST). This paper reviews the methods for accurate on-wafer

Comparison of SOLR and TRL Calibrations

June 1, 1998
Author(s)
Dave K. Walker, Dylan F. Williams
We examine a short-open-load-reciprocal scattering parameter calibration in both in-line and orthogonal probe configurations. We explore its standard definitions and verify its accuracy by comparing it to a multiline thru-reflect-line calibration.

Cyclopolymerizable Monomers for Use as Acrylic Biomaterials

June 1, 1998
Author(s)
John A. Tesk, J W. Stansbury, Alan S. Litsky
Despite their many advantageous characteristics and extensive use, mixtures of methyl methacrylate monomers (MMA) and poly methyl methacrylate powders have some certain shortcomings for their use as synthetic biomaterials eg. In denture base resins

Developing a Method to Determine Linewidth Based on Counting the Atom-Spacings Across a Line

June 1, 1998
Author(s)
Richard M. Silver, Carsten P. Jensen, V W. Tsai, Joseph Fu, John S. Villarrubia, E C. Teague
We are developing the instrumentation and prototype samples at NIST to enable the counting of atom-spacings across linewidth features etched in silicon. This is an effort to allow the accurate counting of atom-spacings across a feature in a controlled

Developing Usability Tools and Techniques for Designing and Testing Web Sites

June 1, 1998
Author(s)
Jean C. Scholtz, Sharon J. Laskowski, L L. Downey
Web sites are developed by a wide variety of companies from small one or two person operations to large corportions with entire teams and departments devoted to web development work. Many of the smaller companies have no usability professionals to help

Display Reflectance Model Based on the BRDF

June 1, 1998
Author(s)
Edward F. Kelley, George R. Jones Jr., Thomas Germer
Many flat panel displays (FPDs) permit anti-reflection surface treatments that differ in character from those of traditional cathode-ray-tube displays. Specular reflection models (mirror-like, producing a distinct image) combined with diffuse (Lambertian)

Document Image Recognition and Retrieval: Where Are We?

June 1, 1998
Author(s)
Michael D. Garris
This paper discusses data collected as a result of planning a project to evaluate document recognition and information retrieval technologies. In the process of establishing the project, a Request for Comment (RFC) was widely distributed throughout the

Effect of Regenerator Geometry on Pulse Tube Refrigerator Performance

June 1, 1998
Author(s)
Michael A. Lewis, T Kuriyama, J Xiao, Ray Radebaugh
This paper gives results of the cooling performance of a double-inlet pulse tube refrigerator using various redenerators. The same pulse tube was used for all the experiments and measured 4.76 mm in diameter and 46.2 m in length. A commercial linear

Emerging Network Storage Management Standards for Intelligent Data Storage Subsystems

June 1, 1998
Author(s)
Fernando L. Podio, W Vollrath, J Williams, B Kobler, D Crouse
Sophisticated network storage management applications are rapidly evolving to satisfy a market demand for highly reliable data storage systems with tremendous data storage capacities and performance requirements. To preserve a high degree of data integrity

Evaluation of High-Voltage Impulse Waveforms Using Model-Based Deconvolution

June 1, 1998
Author(s)
Gerald FitzPatrick, Eric D. Simmon, J. Lagnese
Accurate measurement of high voltage (hv) impulse waveforms is of critical importance in the testing of hv apparatus and for fundamental insulation studies. Quantifying the measurement system errors can be performed by following procedures recommended by
Displaying 52351 - 52375 of 74191
Was this page helpful?