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Displaying 41401 - 41425 of 73697

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

The HI0073/HI0074 Protein Pair From Haemophilus Influenzae is a Member of a New Nucleotidyltransferase Family: Structure, Sequence Analyses, and Solution Studies

February 1, 2003
Author(s)
C Lehmann, Kap Lim, V R. Chalamasetty, W Krajewski, E Melamud, Andrey Galkin, A Howard, Z Kelman, Prasad T. Reddy, A Murzin, O Herzberg
The crystal structure of HI0074 from Haemophilus influenzae, a protein of unknown function, has been determined at a resolution of 2.4 . The molecules form an up-down four-helix bundle, and associate into homodimers. The fold is most closely related to the

The Proving Ring

February 1, 2003
Author(s)
Simone L. Yaniv
In this homepage, the history, construction, design and calibration of proving rings are given. The importance of force measurement and the principles involved are described.

ThermoML - an XML-Based Approach to Standardize Storage and Exchange of experimental and Critically Evaluated Thermophysical and Thermochemical Property Data. 1. Experimental Data

February 1, 2003
Author(s)
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Qian Dong, Svetlana Frenkel, Paul R. Franchois, K N. Marsh, R C. Wilhoit, D L. Embry, T L. Teague
sic principles, scope, and description of all structural elements of ThermoML are discussed. ThermoML is an XML-based approach to standardize storace and exchange of experimental and critically evaluated thermophysical and thermochemical property data

Tuning P-Wave Interactions in an Ultracold Fermi Gas of Atoms

February 1, 2003
Author(s)
C A. Regal, J L. Ticknor, J L. Bohn, D S. Jin
We have measured a p-wave Feshbach resonance in a single-component, ultracold Fermi gas of 40K atoms. We have used this resonance to enhance the normally suppressed p-wave collision cross-section to values larger than thebackground s-wave cross-section

Ultracold Collision Properties of Metastable Alkaline-Earth Atoms

February 1, 2003
Author(s)
A Derevianko, S. G. Porsev, Svetlana A. Kotochigova, Eite Tiesinga, Paul S. Julienne
Ultra-cold collisions of spin-polarized Mg, Ca, and Sr in the metastable 3P2 excited state are investigated. We show the existence of purely long-range potentials, determine the scattering length, and estimate the collisional loss rate as a function of

Uncertainties in Interpolated Spectral Data

February 1, 2003
Author(s)
J L. Gardner
Interpolation is often used to improve the accuracy of integrals over spectral data convolved with various response functions or power distributions. Formulae are developed for propagation of uncertainties through the interpolation process, specifically

X-Ray Absorption Spectroscopy to Probe Interfacial Issues in Photolithography

February 1, 2003
Author(s)
Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Daniel A. Fischer, S Sambasivan, Eric K. Lin, Ronald L. Jones, Christopher Soles, Wen-Li Wu, D L. Goldfarb, M Angelopoulos
Control of the shape, critical dimension (CD), and roughness is critical for the fabrication of sub 100 nm features, where the CD and roughness budget are approaching the molecular dimension of the resist polymers1. Here we utilize near edge X-ray

Automated Security Self-Evaluation Tool Technical Documentation, Version 1.03

January 31, 2003
Author(s)
Mark McLarnon, Marianne M. Swanson
The Automated Security Self-Evaluation Tool (ASSET) automates the process of completing a system self-assessment. ASSET will assist organizations in completing the self-assessment questionnaire contained in NIST Special Publication (Special Publication)
Displaying 41401 - 41425 of 73697
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