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Displaying 37026 - 37050 of 74165

Application of Machine Shop Data Model in Manufacturing Simulation

May 1, 2005
Author(s)
Yan Luo, Yung-Tsun Lee
Simulation technology holds tremendous promise for the manufacturing industry. A machine shop data model has been developed at the National Institute of Standards and Technology (NIST) to represent neutral machine shop data for supporting machine shop

Boundary Fields in Reverberation Chambers

May 1, 2005
Author(s)
David A. Hill
A previous plane-wave integral representation for fields in a reverberation chamber is extended to analyze fields near the boundaries of a rectangular chamber. The field point can be located near a single wall, a right-angle bend, or a right-angle corner

Broad Spectrum Capabilities for CW Laser Power Measurements at NIST

May 1, 2005
Author(s)
Joshua A. Hadler
Recent improvements for mid-level laser power measurements (1 μW to 1 W) have increased the range of calibrations available to customers of our CW laser power measurements. In this presentation we present an overview of our capabilities as well as recent

Comparison of Measurements and Simulations for Machining of Aluminum

May 1, 2005
Author(s)
Robert W. Ivester, Eric P. Whitenton, Laurent Deshayes
This paper compares experimental measurements and model-based simulations of cutting temperature, force, and chip thickness for machining of aluminum. Cutting temperatures have been measured using high-speed infrared videography, and forces have been

Criteria for Exact Qudit Universality

May 1, 2005
Author(s)
G K. Brennen, Dianne M. O'Leary, Stephen Bullock
We describe criteria for implementation of quantum computation in qudits. A qudit is a d-dimensional system whose Hilbert space is spanned by states |0>, |1>,..., |d-1>. An important earlier work of Mathukrishnanand Stroud describes how to exactly simulate

Effect of an Organogelator on the Properties of Dental Composites

May 1, 2005
Author(s)
Elizabeth Wilder, K S. Wilson, Janet Quinn, Drago Skrtic, Joseph M. Antonucci
Bioactive dental composites containing amorphous calcium phosphate have the potential to remineralize caries lesions and white spots, but their applications are limited by the inherent weakness of calcium phosphate as a filler material. In order to extend

Effect of Conformal Roughness on Ferromagnetic Resonance Linewidth in Thin Permalloy Films

May 1, 2005
Author(s)
Brian B. Maranville, J Mallett, Thomas P. Moffat, Robert McMichael, Andrew P. Chen, William F. Egelhoff Jr.
The ferromagnetic resonance line width is a result of both intrinsic damping and contributions from inhomogeneities, which in thin films can be dominated by the roughness. Microstructural measurements and magnetization dynamics are reported here for 50 nm

Experimental Determination of Electron Inelastic Mean Free Paths in 13 Elemental Solids in the 50 eV to 5000 eV Energy Range by Elastic-Peak Electron Spectroscopy

May 1, 2005
Author(s)
S Tanuma, T Shiratori, Tetsuya Kimura, K Goto, S Ichimura, Cedric J. Powell
We have determined electron inelastic mean free paths (IMFPs) in C (graphite), Si, Cr, Fe, Cu, Zn, Ga, Mo, Ag, Ta, W, Pt and Au by elastic-peak electron spectroscopy (EPES) using Ni as a reference material for electron energies between 50 eV and 5000 eV

GaAs Buffer Layer Morphology and Lateral Distributions of InGaAs Quantum Dots

May 1, 2005
Author(s)
Alexana Roshko, Todd E. Harvey, Susan Y. Lehman, Richard Mirin, Kristine A. Bertness, Brittany Hyland
Atomic force microscopy was used to study the morphology of GaAs buffer layers and the density and height distributions of self-assembled InGaAs quantum dots (QDs) grown on these buffers by molecular beam epitaxy. The surface roughness and terrace size of

High-resolution Optical Metrology

May 1, 2005
Author(s)
Richard M. Silver, Ravikiran Attota, Michael T. Stocker, M R. Bishop, Lowell P. Howard, Thomas A. Germer, Egon Marx, M P. Davidson, Robert D. Larrabee
Recent advances in optical imaging techniques have unveiled new possibilities for optical metrology and optical-based process control measurements of features in the 65 nm node and beyond. In this paper we discuss methods and applications that combine

Implementation of the Semiclassical Quantum Fourier Transform in a Scalable System

May 1, 2005
Author(s)
J. Chiaverini, J. Britton, D. Leibfried, Emanuel Knill, M D. Barrett, R. B. Blakestad, W M. Itano, J. D. Jost, C. Langer, R Ozeri, T Schaetz, D Britton, David J. Wineland
The n-qubit concurrence canonical decomposition (CCD) is a generalization of the two-qubit canonical decomposition SU(4)=[SU(2) (x) SU(2)] ? [SU(2) (x) SU(2)], where ? is the commutative group which phases the maximally entangled Bell basis. A prequel

In Situ Ellipsometric Study of PEG/Cl - Coadsorption on Cu, Ag, and Au

May 1, 2005
Author(s)
Marlon L. Walker, Lee J. Richter, Thomas P. Moffat
Spectroscopic ellipsometry was used to examine the adsorption of polyethylene glycol (PEG) and Cl- on polycrystalline Cu, Ag and Au electrodes in sulfuric acid. In halide-free sulfuric acid, PEG adsorption on Cu and Ag is minimal at potentials positive of

In Vitro Cytotoxicity of Amorphous Calcium Phosphate Composites

May 1, 2005
Author(s)
Carl Simon Jr., Joseph M. Antonucci, D W. Liu, Drago Skrtic
Calcium phosphate-based biomaterials are being widely used as bone substitutes in dentistry as well as reconstructive and orthopedic surgery because of their generally accepted good biocompatibility, osteoconductivity and/or bone-bonding properties. Among

Interparticle Interaction Effects in the Magnetic Properities NiO Nanorods

May 1, 2005
Author(s)
M Seehra, H Shim, P Dutta, A Manivannan, John E. Bonevich
Magnetic properties of sol-gel synthesized 5 nm nanorods of NiO, with and without oleic acid coating to affect interparticle interactions, are reported. Particle morphologies were studied by transmission electron microscopy and temperature variations (5 K

IPv6: Hope, Hype, and (Red) Herrings

May 1, 2005
Author(s)
Douglas C. Montgomery
We examine the performance of multimodal biometric authentication systems using state-of-the-art Commercial Off-the-Shelf (COTS) fingerprint and face biometric systems on a population approaching 1,000 individuals. Majority of prior studies of multimodal

Magnetic Normal Modes of Nanoelements

May 1, 2005
Author(s)
Robert D. McMichael, Mark D. Stiles
Micromagnetic calculations are used to determine the eigenfrequencies and precession patterns of some of the lowest-frequency magnetic normal modes of submicron patterned elements. For a Permalloy-like ellipse, 350 nm 160 nm 5 nm thick in zero field, the

Measuring Internal Geometry of Fiber Ferrules

May 1, 2005
Author(s)
Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup
The focus of this paper is on the metrology of microstructures. Traditional Coordinate Measuring Machines (CMM) are limited to measuring holes of 300 m diameter. Smaller features and holes require thinner styli & novel probing technologies that can
Displaying 37026 - 37050 of 74165
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