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Displaying 30426 - 30450 of 74384

Modeling Core-Hole Screening in Core-Excitation Spectroscopies

October 16, 2008
Author(s)
Eric L. Shirley, J A. Soininen, J J. Rehr
We consider screening of the core-hole potential experienced by the ejected electron in core-excitation processes. This potential affects near-edge structure strongly, but it appears difficult to consistently obtain reliable screened core-hole potentials

Modeling Molecular Recognition: Theory and Application

October 16, 2008
Author(s)
K L. Mardis, R Luo, L David, M Potter, A J. Glemza, G F. Payne, M K. Gilson
Efficient, reliable methods for calculating the binding affinities of noncovalent complexes would allow advances in a variety of areas such as drug discovery and separation science. We have recently described a method that accommodates significant physical

Modeling Superconformal Electrodeposition Using an Open Source PDE Solver

October 16, 2008
Author(s)
Daniel Wheeler, Jonathan E. Guyer
Superconformal electrodeposition enables the void-free filling of high aspect ratio features such as trenches or vias in the Damascene metallization process. Superconformal electrodeposition, also known as superfill, occurs when particular combinations of

Moldable, Resorbable, Composite Bone Grafts Consisting of Calcium Phosphate Cement and Polymeric Microspheres: Mechanical Properties, Degradation Kinetics and Release of Bioactive Molecules

October 16, 2008
Author(s)
Francis W. Wang, C A. Khatri, J F. Hsii, S Hirayama, Shozo Takagi
We have developed new moldable, resorbable, composite bone grafts made of calcium phosphate cement (CPC) and poly(d,l-lactide-co-glycolide) [PLGA] microspheres or other porogens that allow control release of growth factors. The mass of the PLGA/CPC

Molecular Spectroscopy

October 16, 2008
Author(s)
D R. Lide, A Weber
This is a revised and expanded version of an article that appeared in the 2nd edition of the Encyclopedia of Physics, R.G. Lerner and G.L. Trigg, eds. Topics covered include Infrared, Raman, rotational, vibration-rotational, and electronic spectra, as well

Molecular Wire Conductance: Surface Electrostatics and Image Effects

October 16, 2008
Author(s)
V Mujica, A. E. Roitberg, M Ratner
We have studied the effect of the electrostatic potential on the current across a one dimensional tight-binding molecular wire by solving self-consistently the Poisson and Schrodinger equations.The results indicate that electrostatic effects on the current

Momentum Distribution of a Fermi Gas of Atoms in the BCS-BEC Crossover

October 16, 2008
Author(s)
C A. Regal, M Greiner, M Giorgini, M J. Holland, D S. Jin
We observe dramatic changes in the atomic momentum distribution of a Fermo gas in the region of the BCS-BEC crossover. We study the shape of the momentum distribution and the kinetic energy as a function of interaction strength. The data are compared to

Monitoring Polymerization in Microfludic Flow Channels Using Spectroscopy Methods

October 16, 2008
Author(s)
Anthony J. Bur, Zuzanna T. Cygan, Kathryn L. Beers, Susan E. Barnes
A micro-fluidic device, designed as a high throughput system for characterizing polymerizations over a range of solvent, monomer, initiator and temperature conditions, was instrumented with a fluorescence spectrometer. A fluorescent dye, incorporated into

Morphological Changes in Thin Polypropylene Films Induced by 4-Biphenyl Carboxylic Acid

October 16, 2008
Author(s)
Marlon L. Walker, Chad R. Snyder, Naomi Eidelman, E S. Etz, A P. Smith, Alamgir Karim, Eric J. Amis
The crystallization behavior of thin polypropylene films both neat and containing a nucleating agent, 4-biphenyl carboxylic acid, was investigated by optical microscopy, atomic force microscopy, infrared spectroscopy and Raman spectroscopy. High-throughput

Morphological Transitions of Elastic Domain Structures in Constrained Layers

October 16, 2008
Author(s)
Julia Slutsker, Andrei Artemev, Alexander L. Roytburd
The phase transformation in a constrained layer is a subject of this paper. The formation and evolution of polydomain microstructure under external stress in the constrained layer are investigated by phase-field simulation and analytically using

Morphology Study of Polystyrene-Polybutadiene-Polycaprolactone (PS-b-PB-b-PCL), Polybutadiene-Polycaprolactone (PB-b-PCL), and Polystyrene-Polycaprolactone (PS-b-PCL) Semicrystalline Block Copolymers

October 16, 2008
Author(s)
G Kim, C L. Jackson, M Libera, R Stadler, Charles C. Han, F V. Gyldenfeldt, V Balsamo
Distinctive behaviors of PCL(polycaprolactone) in block copolymers are significant for various polymer applications such as low temperature adhesives, biocompatibilizer and pigments. Thus, there has been increasing interest in the morphologies of block

Moving Beyond Crunch-the-Crown Testing Clinical Failure

October 16, 2008
Author(s)
J R. Kelly
Traditional fracture tests of single unit prostheses are inappropriate, since they do not create failure mechanisms seen clinically. Validated tests are needed to elucidate the role(s) metal copings, cement systems, bonding and occlusion play in the

MSEL 2003 Programs and Accomplishments: Materials Reliability

October 16, 2008
Author(s)
James A. St Pierre
The Materials Reliability Division mission is to develop and disseminate measurement methods and standards enhancing the quality and reliability of materials for industry. Our portfolio of research projects has changed again this past year, as we continue

NAA Characterization of the New Bovine Liver SRM

October 16, 2008
Author(s)
Rolf L. Zeisler, W. D. James, Elizabeth A. Mackey, Rabia Oflaz, Robert R. Greenberg
The National Institute of Standards and Technology (NIST) is preparing a freeze-dried powdered bovine liver tissue Standard Reference Material (SRM) to replace SRM1577b Bovine Liver as the stock of this material was exhausted during 2006. Like the original

Nanoscale Mechanisms of Fatigue in Ionic Solids

October 16, 2008
Author(s)
Emily Jarvis, E A. Carter
We employ periodic density functional calculations to explore the effect of cyclic tensile loading on the behavior of alumina in the threshold region of crack formation, i.e., where the crystal must choose between healing a defect through a uniform elastic
Displaying 30426 - 30450 of 74384
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