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Displaying 41651 - 41675 of 73969

More Diamagnetism Demonstrations

February 1, 2003
Author(s)
Chris Conery, Loren F. Goodrich, Theodore C. Stauffer
The availability of very strong permanent magnets allows observation of phenomena previously difficult to see. The diamagnetism of water and diamagneticly stabilized magnetic levitation are now easy to demonstrate.

On Information and Performance of Complex Manufacturing Systems

February 1, 2003
Author(s)
Albert W. Jones, Larry H. Reeker, A S. Deshmukh
This paper makes several critical points related to the intrinsic relationship between information and performance in complex, dynamic systems. Using a manufacturing enterprise as an example, we highlight the co-dependence of information and decision

Optical Properties of Gold Nanorings

February 1, 2003
Author(s)
Javier Aizpurua, P Hanarp, D S. Sutherland, Garnett W. Bryant, F J. Garcia de Abajo, M Kall
The optical response of ring-shaped gold nanoparticles prepared by colloidal lithography is investigated. Compared to solid gold particles of similar size, nanorings exhibit a redshifted localized surface plasmon that can be tuned over an extended

Physics Laboratory: 2002 Activities, Accomplishments and Recognition

February 1, 2003
Author(s)
Jonathan E. Hardis, William R. Ott, G G. Wiersma
This report summarizes the research and measurement science carried out during calendar year 2001 in the NIST Physics Laboratory. The Laboratory supports U.S. industry, government, and the scientific community by providing measurement services and research

Polymer Dynamics and Diffusive Properties in Ultra-Thin Photoresist Films

February 1, 2003
Author(s)
Christopher L. Soles, Ronald L. Jones, Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Vivek M. Prabhu, Wen-Li Wu, Eric K. Lin, D L. Goldfarb, M Angelopoulos
A series of experiments are presented to demonstrate thin film confinement effects on the diffusive properties in poly(tert-butoxycarboxystyrene) (PBOCSt). Bilayer diffusion couple measurements reveal that as the thickness of a PBOCSt film is decreased

Potassium Bromate Assay by Redox Titrimetry Using Arsenic Trioxide

February 1, 2003
Author(s)
J M. Smeller, Stefan D. Leigh
Bromate, a disinfectant, is one of the analytes of interest in wastewater analysis. Environmental laboratories have a regulatory need for their measurements to be traceable to NIST standards. Bromate is not currently certified as a NIST Standard Reference

Present Status of Radiometric Quality Silicon Photodiodes

February 1, 2003
Author(s)
R Korde, C Prince, N. Cunningham, Robert E. Vest, E Gullikson
Evaluation of five types of silicon photodiodes was undertaken to verify their suitability for absolute radiometry and also for their use as transfer standards in the spectral region from 1 nm to 1100 nm. Four types of photodiodes were fabricated for this

Quantitative Synthetic Polymer Mass Spectrometry Workshop

February 1, 2003
Author(s)
William E. Wallace, Charles M. Guttman, S D. Hanton
Mass spectrometry is a rapidly evolving measurement technique for synthetic polymers. It holds the promise of providing not only absolute molecular mass distributions but also quantitative end-group and repeat-unit composition, and structural information

Radiometrically Deducing Aperture Sizes

February 1, 2003
Author(s)
Allan W. Smith, Adriaan C. Carter, Steven R. Lorentz, Timothy M. Jung, Raju V. Datla
The desire for high-accuracy infrared sources suitable for low-background seeker/tracker calibrations pushes the limits of absolute cryogenic radiometry and blackbody design. It remains difficult to calibrate a blackbody at flux levels below 1 nW/cm2 using

Receptance Coupling for High-Speed Machining Dynamics Prediction

February 1, 2003
Author(s)
T L. Schmitz, Timothy J. Burns
We apply receptance coupling techniques to predict the tool-point frequency response for high-speed machining applications. Building on early work of Duncan, Bishop and Johnson, and more recent work of Ewins, et al., we develop an analytic expression for

Short-Term Characterization of Building Integrated Photovoltaic Panels

February 1, 2003
Author(s)
Arthur H. Fanney, Brian P. Dougherty, Mark W. Davis
Building integrated photovoltaics, the integration of photovoltaic cells into one or more exterior building surfaces, represents a small but growing part of today s $2 billion photovoltaic industry. A barrier to the widespread use of building integrated

Standardization and Conformity Assessment in the Republic of Korea

February 1, 2003
Author(s)
G H. Choe
This report describes the national standardization and conformity assessment system in the Republic of Korea. To the extent possible, efforts have been made to provide a comparison of U.S. entities with Korean entities.Though a general overview of the

Stray-Light Correction Algorithm for Spectrographs

February 1, 2003
Author(s)
Steven W. Brown, Bettye C. Johnson, M Feinholz, M Yarbrough, S Flora, Keith R. Lykke, D K. Clark
In this work, we describe an algorithm to correct a spectrograph's response for stray light. Two recursion relations are developed: one to correct the system response when measuring broad-band calibration sources and a second to correct the response when

Sumo2loom Documentation

February 1, 2003
Author(s)
David W. Flater
In 2002, a project at the U.S. National Institute of Standards and Technology (NIST) called for the use of an upper ontology in conjunction with an inference engine. After a review of available ontologies and inference engines it was decided to translate

Superconformal Electrodeposition of Silver from a KAg(CN) 2 -KCN-KSeCN Electrolyte

February 1, 2003
Author(s)
B C. Baker, M Freeman, B Melnick, Daniel Wheeler, Daniel Josell, Thomas P. Moffat
Electrodeposition of silver from a KAg(CN) 2-KCN electrolyte was investigated. The addition of potassium selenocyanate (KSeCN) results in a hysteretic current-voltage response, specular films and superconformal growth in submicrometer vias. These

The Essentials of a Database Quality Process

February 1, 2003
Author(s)
D M. Blakeslee, J R. Rumble
Many steps are involved in the process of turning an initial concept for a database into a finished product that meets the needs of its user community. In this paper, we describe those steps in the context of a four-phase process with particular emphasis
Displaying 41651 - 41675 of 73969
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