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Displaying 39376 - 39400 of 73830

Optical Anisotropy in Viscoelastic Carbon Nanotube Suspensions

February 1, 2004
Author(s)
D J. Fry, Erik K. Hobbie
Carbon nanotubes, having remarkably high tensile strength, large aspect ratio, and enhanced electrical and thermal properties, continue to hold much promise as filler particles for new classes of composite materials. Processing of these materials, such as

Organogelators and Their Application in Bioactive Dental Composites

February 1, 2004
Author(s)
Elizabeth Wilder, Joseph M. Antonucci
Concerns regarding the use of amalgam fillings in restorative dentistry have spurred an interest in alternative polymeric dental materials such as bioactive composites. However, current polymeric dental composites are inadequate for use in posterior dental

Parallel Programming with Interoperable MPI

February 1, 2004
Author(s)
William L. George, John G. Hagedorn, J E. Devaney
In this article we describe IMPI (Interoperable Message Passing Interface), a message passing protocol that allows you to easily run parallel programs across multiple clusters, SMPs (symmetric multiprocessors), parallel machines, personal computers, and

Peel Test Revisited Using Novel High Throughput Methods

February 1, 2004
Author(s)
A Chiche, Wenhua Zhang, Christopher Stafford
We have developed a novel combinatorial method for peel testing based on the use of gradient techniques, including surface roughness and energy, adhesive or backing layer thickness, and sample annealing temperature. The experimental design provides us with

Phase Field Modeling of Electrochemistry. I. Equilibrium

February 1, 2004
Author(s)
Jonathan E. Guyer, William J. Boettinger, James A. Warren, Geoffrey B. McFadden
A diffuse interface (phase field) model for an electrochemical system is developed. We describe the minimal set of components needed to model an electrochemical interface and present a variational derivation of the governing equations. With a simple set of

Phase Field Modeling of Electrochemistry. II. Kinetics

February 1, 2004
Author(s)
Jonathan E. Guyer, William J. Boettinger, James A. Warren, Geoffrey B. McFadden
The kinetic behavior of the phase field model described in (J.E. Guyer, W.J. Boettinger, J.A. Warren and G. B. McFadden, Phase field modeling of electrochemistry: Equilibrium, unpublished) is explored for advancing (plating) and receding (corroding)

Phase-locked, erbium-fiber-laser-based frequency comb in the near infrared

February 1, 2004
Author(s)
Brian Washburn, Jeffrey W. Nicholson, C. G. Jorgensen, M. Yan, Scott Diddams, Nathan R. Newbury
A phase-locked frequency comb in the near-infrared is demonstrated with a mode-locked, Erbium-doped, fiber laser, whose output is amplified and spectrally broadened in dispersion-flattened highly nonlinear optical fiber to span from 1100 nm to >2200 nm

Photoassociation Spectroscopy of the Lowest Triplet Potential of Na 2

February 1, 2004
Author(s)
R Dumke, M Johanning, J D. Weinstein, Paul D. Lett
We have performed a type of Autler-Townes spectroscopy to investigate the level structure of the triplet ground state potential of the sodium dimer. By driving photoassociation transitions with continuous-wave lasers, we state-selectively form excited

Porous Tin Oxide Nanostructured Microspheres for Sensor Applications

February 1, 2004
Author(s)
C Martinez, B Hockey, Christopher B. Montgomery, Stephen Semancik
There is a growing need to develop highly sensitive chemical sensors for applications such as military reconnaissance and toxic waste removal. A promising route for improving device performance is to use nanostructured materials (e.g. nanoparticles

Quantitative Response Measurement of Cell Substrate Interactions via RT-PCR

February 1, 2004
Author(s)
Matthew Becker, L A. Bailey, Karen L. Wooley, J Kohn, Eric J. Amis, N Washburn
High-throughput metrologies for the rapid and systematic evaluation of synthetic materials, which would elucidate a candidate s potential biocompatibility, are needed. New synthetic methodologies have enabled a remarkable advance in the rational design of

Reaching Beyond Discovery

February 1, 2004
Author(s)
Eric J. Amis
Whatever you are trying to make, the choice of materials is often bewildering. Novel combinatorial approaches allow you to reduce the time and costs necessary to optimize results, while stimulating the quest for deeper fundamental knowledge.

Realization of a Quantum Random Walk With Ultracold Atoms

February 1, 2004
Author(s)
D Ciampini, M B. d'Arcy, J M. Grossman, Kristian Helmerson, Paul D. Lett, William D. Phillips, A Vaziri, S L. Rolston
Classical random walks have many applications in computer science. Quantum random walks (QRWs) [1] have been suggested as the potential basis for quantum computing algorithms. Such algorithms have been reported, some of which offer an exponential speed-up

Scattering Methods Applied to High Throughput Materials Science

February 1, 2004
Author(s)
A I. Norman, J Cabral, D L. Ho, Eric J. Amis, Alamgir Karim
Scattering methods have been employed to study the aqueous phase behavior of two low molecular weight diblock copolymers, EO(6)BO(11) and EO(18)BO(9), where EO denotes an ethyleneoxide unit and BO denotes a butyleneoxide unit. Depending on the lengths of

Semiconductor Nanocrystal Probes for Human Metaphase Chromosomes

February 1, 2004
Author(s)
Yan Xiao, Peter E. Barker
Novel inorganic fluorophores called semiconductor nanocrystals have recently been incorporated into protein, antibody and microbead oligonucleotide detection methods where previously, organic dyes were universally employed. To improve quantitation of

Significant Parameters in the Optimization of MALDI-TOF-MS

February 1, 2004
Author(s)
S Wetzel, Kathleen M. Flynn, James J. Filliben
One of the most significant issues in any analytical technique is optimization. Optimization and calibration are key factors in quantitation. In matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), one of the
Displaying 39376 - 39400 of 73830
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