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Displaying 41826 - 41850 of 74203

A Seven Junction Cooper Pair Pump

February 15, 2003
Author(s)
Joe Aumentado, Mark W. Keller, John M. Martinis
We have measured current-voltage curves and individual charge transfer events in single-Cooper-pair pumps. We observe clear charge pumping in units of 2e, but this behavior is accompanied by significant effects from unwanted quasiparticles.

Fingerprint Matching Using Distortion Tolerant Filters

February 13, 2003
Author(s)
Craig I. Watson, D P. Casasent
The purpose of this paper is to discuss the use of distortion tolerant filters to improve the performance of fingerprint correlation matching. Previous work has shown that correlation matching of fingerprints is susceptible to larger false alarm rates than

Comparison of Cryogenic Radiometry and Thermal Radiometry Calibrations at NIST Using Multichannel Filter Raidometers

February 7, 2003
Author(s)
Bettye C. Johnson, Steven W. Brown, Keith R. Lykke, Charles E. Gibson, G Fargion, G Meister, S B. Hooker, B L. Markham, James J. Butler
Comparison of independent measurement results allows an assessment of the accuracy of the underlying methods. In this work, four multichannel filter radiometers were calibrated using tunable laser-illuminated and lamp-illuminated integrating sphere sources

Binding and Hydrolysis of Ampicillin in the Active Site of a Zinc Lactamase

February 6, 2003
Author(s)
Morris Krauss, N. Gresh, J Antony
Binding and hydrolysis of ampicillin is described in a model active site derived from di-nuclear B.fragilis zinc lactamase. The protein binding site consists of the two zinc cations bound with a bridging hydroxide and ligands from the first-shell residues

Formation of aluminum oxide thin films on FeAl(110) studied by STM

February 6, 2003
Author(s)
Orhan Kizilkaya, Dustin Hite, David M. Zehner, Phillip T. Sprunger
The surface morphology and atomic structure of clean and oxidized FeAl(l 10) surfaces have been investigated with scanning tunneling microscopy (STM). An incommensurate reconstructed structure, having FeAl2 stoichiometry confined to the outmost layer, is

Slow Damping of Internal Waves in a Stably Stratified Fluid

February 4, 2003
Author(s)
Katharine F. Gurski, R Kollar, R L. Pego
We study the damping of internal gravity waves in a stably stratified fluid with constant viscosity in two- and three-dimensional bounded domains. For the linearized Navier-Stokes equations for incompressible flow with no-slip boundary conditions that

NIST Standard Reference Materials Catalog 2003

February 3, 2003
Author(s)
J W. Thomas
This catalog provides technical and general ordering information for the Standard Reference Materials [SRMs] and Reference Materials [RMs] currently available from the NIST SRM Program. The materials are arranged according to technical category and

2003 Weights and Measures Directory

February 1, 2003
Author(s)
L T. Sebring
This directory is a listing of weights and measures officials in the U.S. and its territories. It includes each official's agency, title, address, phone, fax, e-mail, and some URL addresses.

A Double-Primary Dead-Weight Tester for Pressures (35-175) kPa in Gage Mode

February 1, 2003
Author(s)
K. Jain, Y Q. Cen, Walter J. Bowers Jr., James W. Schmidt
Primary pressure standards in the atmospheric pressure range are often established using mercury manometers. Less frequently, controlled-clearance dead-weight testers in which one component (normally the piston) has been dimensionally measured have also

A Study on the Variance Estimation for a Stationary Process in SPC

February 1, 2003
Author(s)
Nien F. Zhang
Recently, statistical process control (SPC) methodologies have been developed to accommodate autocorrelated data. To construct control charts for stationary process data, the process variance needs to be estimated. For an independently identically

A SURF Beamline for Synchrotron Source-Based Absolute Radiometry

February 1, 2003
Author(s)
Ping-Shine Shaw, Uwe Arp, Howard W. Yoon, Robert D. Saunders, Albert C. Parr, Keith R. Lykke
A new source-based radiometry beamline at Synchrotron Ultraviolet Radiation Facility (SURF III) was constructed recently. The goal of this beamline is to establish a national source standard with wide spectral range from far UVto IR by using the

Accurate spectral characterization of polarization-dependent loss

February 1, 2003
Author(s)
Rex M. Craig
Building on previous work, a rapid, automated, non-mechanical measurement system for spectral characterization of polarization-dependent loss (PDL) has been developed. A deterministic fixed-states Mueller/Stokes method in conjunction with real-time

Agglomerate Formation During Drying

February 1, 2003
Author(s)
A Vertanessian, Andrew J. Allen, M J. Mayo
The evolution of agglomerate structure during drying of particles from suspension has been studied for a nanocrystalline Y2O3 (8 mol %)-stabilized ZrO2 powder. Agglomerates in drying and dried suspensions were examined at the smallest size scales (100 nm

Algorithms and Codes for the Macdonald Function: Recent Progress and Comparisons

February 1, 2003
Author(s)
B R. Fabijonas, Daniel W. Lozier, J M. Rappoport
The modified Bessel function K iŅχ, also known as the Macdonald function, finds application in the Kontorovich-Lebedev integral transform when χ and Ņ are real and positive. In this paper, a comparison of three codes for computing this function is made

An Investigation of Particle Dynamics in a Rotating Disk Chemical Vapor Deposition Reactor

February 1, 2003
Author(s)
D M. Kremer, R W. Davis, Elizabeth F. Moore, James E. Maslar, Donald R. Burgess Jr., S H. Ehrman
This paper describes a numerical model for the nucleation, growth and transport of gas phase particles formed during the chemical vapor deposition (CVD) of epitaxial silicon from silane. This model has been constructed for use with the Sandia SPIN code
Displaying 41826 - 41850 of 74203
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