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Search Publications

NIST Authors in Bold

Displaying 34126 - 34150 of 73697

Characterization of Inertance Tubes Using Resonance Effects

June 14, 2006
Author(s)
Michael A. Lewis, Peter E. Bradley, Ray Radebaugh, Zhihua Gan
Inertance tubes can be characterized by their inertance, compliance, and resistance. All three of these impedance components are present during normal measurements of inertance tube impedance. As a result, in comparing experimental results with models it

Feasibility on Using a Concrete Mixing Truck as a Rheometer

June 14, 2006
Author(s)
S Amziane, Chiara C. Ferraris, E Koehler
Fresh concrete properties are crucial for the performance of the concrete in its hardened state. The measurement of workability is usually done using a simple slump test. This test, although widely used for almost 100 years, does not provide a full picture

Program: 2006 Boulder Laboratories Postdoctoral Poster Symposium

June 14, 2006
Author(s)
Joe W. Magee
The Boulder Laboratories Diversity Council has announced a networking opportunity - the 2006 Boulder Laboratories Postdoctoral Poster Symposium, for postdoctoral associates and student affiliates. The planned event is to begin with an informal gathering

Proposed Rapid Cooldown Technique for Pulse Tube Cryocoolers

June 14, 2006
Author(s)
Ray Radebaugh, Agnes O?Gallagher, Michael A. Lewis, Peter E. Bradley
Some cryocooler applications, such as those for military operations dealing with high temperature superconducting (HTS) magnets, motors, or generators, require faster cooldown times than what can normally be provided with a cryocooler designed to

Usability Standards: Are they effective in fostering good usability practice?

June 14, 2006
Author(s)
Mary F. Theofanos, Whitney Quesenbery, Dean Barker, Lisa Battle, Mike Paciello, Mary Beth Rettger
Do standards have a place in developing our usability practice? From those who believe they are a critical part of developing the profession to those who think they get in the way of creativity, standards provoke strong opinions. At Usability Professionals

Uncertainties of Spectral Responsivity Measurements

June 13, 2006
Author(s)
George P. Eppeldauer, G Sauter, James Gardner
Uncertainty estimates of detector spectral responsivity measurements are discussed. A model describes independent (uncorrelated) uncertainty components at a given wavelength based on the measurement equation for test detector calibrations. Systematic

When to Fuse Two Biometrics?

June 13, 2006
Author(s)
Elham Tabassi, Patrick J. Grother, George W. Quinn
Biometric fusion, acquisition and combination of multiple pieces of evidence of identity, can achieve higher accuracy of biometric recognition than using a single biometric. However, fusion increases the cost or throughput of the system since it requires

Focus Groups Gauge Satisfaction of Interdisciplinary Customer Segments

June 12, 2006
Author(s)
Nancy Allmang, Mylene S. Ouimette
This poster describes a series of focus groups conducted by librarians at the Research Library at the National Institute of Standards and Technology (NIST) to assess the information needs and satisfaction of three hard-to-identify, interdisciplinary groups

Reverse Noise Measurement and Use in Device Characterization

June 10, 2006
Author(s)
James P. Randa, Tom McKay, Susan L. Sweeney, Dave K. Walker, Lawrence Wagner, David R. Greenberg, Jon Tao, G. Ali Rezvani
We review the concept of reverse noise measurements in the context of on-wafer transistor noise characterization. Several different applications of reverse noise measurements are suggested and demonstrated. Reverse measurements can be used to check

Correlating Molecular Design to Microstructure in Thermally Convertible Oligothiophenes: The Effect of Branched versus Linear End Groups

June 8, 2006
Author(s)
Dean M. DeLongchamp, Youngsuk Jung, Daniel A. Fischer, Eric K. Lin, P C. Chang, V Subramanian, A R. Murphy, J M. Frechet
The thin film microstructure development of functionalized oligothiophenes with branched, thermally removable groups at each end of conjugated cores with five, six, and seven thiophene rings was monitored during their thermal conversion from solution

Soft X-Ray Absorption Spectroscopy of the MgB 2 Boron K Edge in an MgB 2 /Mg Composite

June 8, 2006
Author(s)
Daniel A. Fischer, A R. Moodenbaugh, Q Li, G Gu, Y Zhu, J W. Davenport, D O. Welch, H Su
Soft x-ray absorption (XAS), using fluorescence yield, was used to study the boron K near edge in MgB2 superconductor. The sample consists of MgB2 crystallites randomly oriented in a magnesium matrix. Abrasion of the sample surface in vacuum provides a

Display Measurements for Flat Panel Displays

June 7, 2006
Author(s)
Edward F. Kelley
In this tutorial, problems encountered in making common measurements on flat-panel displays are reviewed, equipment limitations are explored, and properly managed stray light is stressed. Reflection description and measurement apparatus robustness are

Energy Levels and Spectral Lines of Ne VIII

June 7, 2006
Author(s)
Alexander Kramida, M-C Buchet-Poulizac
All experimental data on the valence-shell-excited and inner-shell-excited spectra of Li-like neon, including previously unpublished beam-foil spectroscopy data, have been compiled and critically evaluated. Seventeen spectral lines have been newly
Displaying 34126 - 34150 of 73697
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