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Displaying 17751 - 17775 of 74137

A Cross-Benchmarking and Validation Initiative for Tokamak 3D Equilibrium Calculations

October 27, 2014
Author(s)
Geoffrey B. McFadden, Allan Reiman, Antoine Cerfon, E. Lazarus, S. Lazerson
We are pursuing a cross-benchmarking and validation initiative for tokamak 3D equilibrium calculations, with 11 codes participating: the linearized tokamak equilibrium codes IPEC and MARS-F,the time-dependent extended MHD codes M3D-C1, M3D, and NIMROD, the

Nanoparticle size determination using optical microscopes

October 27, 2014
Author(s)
Ravikiran Attota, Richard J. Kasica, Premsagar P. Kavuri, Hyeong G. Kang, Lei Chen
We present a simple method for size determination of nanoparticles using conventional optical microscopes. The method, called through-focus scanning optical microscopy (TSOM), makes use of the four-dimensional optical information collected at different

Spatial Computations over Terabyte-Sized Images on Hadoop Platforms

October 27, 2014
Author(s)
Peter Bajcsy, Antoine Vandecreme, Mary C. Brady, Phuong Nguyen
Our objective is to lower the barrier of executing spatial image computations in a computer cluster/cloud environment instead of in a desktop/laptop computing environment. We research two related problems encountered during an execution of spatial

The Leucine-Rich Amelogenin Peptide (LRAP) is a Partially Structured Monomer in Solution

October 25, 2014
Author(s)
Barbara J. Tarasevich, John S. Philo, Nasib Karl Mulof, Susan T. Krueger, Garry W. Buchko, Genyao Lin, Wendy J. Shaw
Amelogenin proteins are critical to the formation of enamel in teeth and may have roles in promoting nucleation, controlling growth, and regulating microstructures of the intricately woven hydroxyapatite (HAP). Leucine-rich amelogenin peptide (LRAP) is a

Path degeneracy and EXAFS analysis of disordered materials

October 24, 2014
Author(s)
Bruce D. Ravel
The analysis of EXAFS data measured on a material with a disordered local configuration environment around the absorbing atom can be challenging due to the proliferation of photoelectron scattering paths that must be considered in the analysis. In the case

3D Monte Carlo modeling of the SEM: Are there applications to photomask metrology?

October 23, 2014
Author(s)
John S. Villarrubia, Andras Vladar, Michael T. Postek
The ability to model the effect of fields due to charges trapped in insulators with floating conductors has been added to JMONSEL (Java Monte Carlo simulator for Secondary Electrons) and applied to a simple photomask metal on glass geometry. These

An Additive Manufacturing Test Artifact

October 23, 2014
Author(s)
Shawn P. Moylan, John A. Slotwinski, A L. Cooke, Kevin K. Jurrens, M A. Donmez
We propose a test artifact, intended for standardization, for the purpose of evaluating the performance of additive manufacturing (AM) systems. A thorough analysis of previously proposed AM test artifacts as well as experience with machining test artifacts

High-Fidelity, Weak-Light Polarization Gate Using Room-Temperature Atomic Vapor

October 23, 2014
Author(s)
Lu Deng, Runbing Li, Chengjie Zhu, Edward W. Hagley
Using a polarization-selective-Kerr-phase-shift technique we demonstrate an all-optical polarization gate in an atomic gain medium with the control-field intensity equivalent to 20 photons of 10 nanoseconds propagating in a 5 μm mode diameter photonic

On Systemic Risk in the Cloud Computing Model

October 23, 2014
Author(s)
Vladimir V. Marbukh
The major benefits of the emerging cloud computing infrastructure include elimination of the fixed cost and reduction in the marginal cost for the users due to the economy of scale and dynamic resource sharing. This paper argues that these unquestionable

Structure and Stability of Phospholipid Bilayers Hydrated by a Room-Temperature Ionic Liquid/Water Solution: a Neutron Reflectometry Study

October 23, 2014
Author(s)
Antonio Benedetto, Frank Heinrich, Miguel A. Gonzalez, Giovanna Fragneto, Erik Watkins, Pietro Ballone
Neutron reflectometry measurements (NR) have been carried out to probe the structure and stability of two model bio-membranes consisting of POPC and DMPC phospholipid bilayers hydrated by water solutions of two prototypical room-temperature ionic liquids

Feasibility of Integrating OAGIS and BPMN

October 22, 2014
Author(s)
Denis Gagne, Conrad Bock
Engineering and enterprise processes overlap in their concerns, for example, coordinating product design and customer relations. Integration of these processes provides more efficient communication and higher quality results than leaving them separated

Magnetoencephalography of Epilepsy with a Microfabricated Atomic Magnetrode

October 22, 2014
Author(s)
Svenja A. Knappe, Orang Alem, Alex M. Benison, Daniel S. Barth, John E. Kitching
We measured the magnetic signature of epileptiform discharges with high signal-to-noise ratio, using microfabricated atomic magnetometers based on laser spectroscopy of rubidium vapor and similar in size to scalp EEG electrodes. Sensitivity to neuronal

Prediction and Validation of Diffusion Coefficients in a Model Drug Delivery System Using Microsecond Atomistic Molecular Dynamics Simulation and Vapor Sorption Analysis

October 21, 2014
Author(s)
Christopher Forrey, D M. Saylor, Joshua S. Silverstein, Jack F. Douglas, Eric Davis, Yossef A. Elabd
Diffusion of small to medium sized molecules in polymeric medical device materials underlies a broad range of public health concerns related to unintended leaching from or uptake into implantable medical devices. Knowledge of diffusion rates is thus

Tunable Cobalt Vacancies and Related Properties in LaCo x As 2

October 21, 2014
Author(s)
Shijie Shen, Gang Wang, Shifeng Jin, Qingzhen Huang, Tianping Ying, Dandan Li, Xiaofang Lai, Tingting Zhou, Han Zhang, Zhiping Lin, Xiaozhi Wu, Xiaolong Chen
The origin of transition metal vacancies and their effects on the properties of ThCr 2Si 2-type compounds have been less studied and poorly understood. Here we carefully investigate the structure, physical properties, and electronic structure for a series
Displaying 17751 - 17775 of 74137