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NIST Authors in Bold

Displaying 34251 - 34275 of 73697

Chapter A.2.1 Photometry, Handbook of Optoelectronics

May 17, 2006
Author(s)
Yoshihiro Ohno
General introduction to photometry, radiometry, and colorimetry is given. The chapter consists of the following sections:1. Introduction2. Basis of Physical Photometry (2.1 Visual response, 2.2 Photometric base unit the candela)3. Quantities and Units in

Development of the NIST Detector-based Color Temperature Scale

May 17, 2006
Author(s)
George P. Eppeldauer, Yoshihiro Ohno
Based on the spectral responsivity of the channels of a tristimulus colorimeter, a color temperature scale is being developed at NIST. The low uncertainty of the spectral responsivity measurements can dominate the chromaticity measurement uncertainty. New

Fatigue Resistant Miniature Piezoceramic Actuators

May 17, 2006
Author(s)
Stephanie A. Hooker, Jens Mueller, Clayton Kostelecky, K. Womer
Piezoelectric ceramics are desirable actuator materials for many biomedical applications due to their ability to generate precise, controlled motion with applied voltage. Herein, we report the fabrication of miniature piezoceramic actuators and their

Overview of TREC 2005

May 17, 2006
Author(s)
Ellen M. Voorhees
The fourteenth Text REtrieval Conference, TREC 2005, was held at the National Institute of Standards and Technology (NIST) November 15--18, 2005. The conference was co-sponsored by NIST and the US Department of Defense Advanced Research and Development

Anionic Effects in Hot Surface Catalyzed Combustions.

May 16, 2006
Author(s)
W W. Bannister, F Lai, W Paramasawat, W Sriseubsai, A Donatelli, J Li, F Bonner, N Schott, P Kurup, J Egan, E.G E. Jahngen, P Muanchareon, N Euaphantasate, S K. Chiang, S Sengupta, C S. Kuo, R Nagarajan, J Chaospukhum, A Meesrisom, V Kongkadee, V Babrauskas

Comparisons by PTB, NIST, and LNE-LADG in Air and Natural Gas With Critical Venturi Nozzles Agree Within 0.05 %

May 16, 2006
Author(s)
B Mickan, Roland H. Kraemer, D Dopheide, Hans-Jurgen Hotze, Heino-Michael Hinze, Aaron Johnson, John D. Wright, J-P Vallet
The PTB, NIST, and LNE-LADG conducted a comparison of gas flow measurement standards in air and natural gas in the pressure range from 0.9 to 42 bar. The artifacts used in the intercomparisons were four critical venturis with ISO standard toroidal shape

Diverter Uncertainty Less Than 0.01 percent for Water Flow Calibrations

May 16, 2006
Author(s)
Iryna V. Marfenko, Tsyh Tyan Yeh, John D. Wright
Measurement uncertainties introduced by liquid flow diverters are often one of the major contributors to the total uncertainty of static gravimetric liquid flow calibration facilities. This paper describes the primary water flow standard at NIST and tests

Fluid Dispensing and Dispersion

May 16, 2006
Author(s)
Jiann C. Yang, David R. Keyser
This paper is a condensed version of a chapter in the forthcoming Next Generation Program (NGP) final report edited by the authors. It summarizes the research conducted during the NGP program on fluid dispensing and dispersion within aircraft engine

Further Studies of Cup-Burner Flame Extinguishment.

May 16, 2006
Author(s)
F Takahashi, Gregory T. Linteris, Vishwanath R. Katta
The structure and extinguishment of heptane-air co-flow diffusion flames formed on a cup burner in normal earth gravity have been studied experimentally and computationally. A gaseous fire-extinguishing agent (CO2) was introduced gradually into a coflowing

Structure, ferromagnetic resonance and permeability of nanogranular fe-Co-B-Ni films

May 16, 2006
Author(s)
Pasquale Massimo, Celegato Federica, Coisson Marco, Magni Alessandro, Perero Sergio, Pavel Kabos, Teppati Valeria, Han Suk Hee, Kim Jongryoul, Lim Sang Ho
The static and microwave magnetic properties of soft nanogranular (Fe0.7)Co0.3)71B22Ni films with a 2T saturation magnetization are presented as a function of thickness, ranging from 135 to 235 nm. Microwave permeability values from 10 to 50 are measured

NIST Measurement Services: Specular Gloss

May 15, 2006
Author(s)
Maria E. Nadal, E A. Early, E A. Thompson
This document describes the instrumentation, standards, and measurement techniques used at the National Institute of Standards and Technology (NIST) to measure specular gloss. The organization of this document is as follow. Section 1 describes the

Phase-stabilized ultrafast lasers signal new era in measurement and research

May 15, 2006
Author(s)
Tara M. Fortier, A Bartels, Scott A. Diddams
The development of short-pulsed lasers has progressed steadily over the past 30 years. In the search for better techniques and materials to generate shorter and shorter pulses, the 1990?s witnessed the arrival of Kerr-lens mode-locked Ti:sapphire lasers as

TDR Permittivity Measurements of Dielectric Films

May 15, 2006
Author(s)
Jan Obrzut, R Nozaki
We have developed a time-domain reflectometry (TDR) technique to measure the dielectric permittivity of film specimens. The test specimen consists of a planar capacitor terminating coaxial waveguide. The complex permittivity is obtained from analysis of

High-resolution spectroscopic measurements of InGaAs/GaAs self-assembled quantum dots

May 12, 2006
Author(s)
Joseph J. Berry, Martin Stevens, Richard Mirin, Kevin L. Silverman
We report development of two absorption-based spectroscopic methods that have been adapted from atomic physics techniques to elucidate the basic physical properties of InGaAs/GaAs self-assembled quantum dots(SAQDs). Absorptive spectroscopic measurements
Displaying 34251 - 34275 of 73697
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