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Displaying 22601 - 22625 of 74178

Challenges in Microbial Sampling in the Indoor Environment

March 1, 2012
Author(s)
Jayne B. Morrow, Autumn S. Downey, Jordan Peccia
This report summarizes the results of the Challenges in Microbial Sampling in the Indoor Environment Workshop held on February 14-15, 2011 at the National Institute of Standards and Technology in Gaithersburg, Maryland.

CODATA Recommended Values of the Fundamental Physical Constants: 2010

March 1, 2012
Author(s)
Peter J. Mohr, Barry N. Taylor, David B. Newell
This paper give the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. The 2010 adjustment takes into

Differential matrices for depolarizing media

March 1, 2012
Author(s)
Thomas A. Germer
The evolution of a Stokes vector through depolarizing media is considered. A general form for the differential matrix is derived that is appropriate in the presence of depolarization, and is parameterized in a manner that ensures that it yields, upon

Freeform Fabricated Scaffolds with Roughened Struts that Enhance both Stem Cell Proliferation and Differentiation by Controlling Cell Shape

March 1, 2012
Author(s)
Girish Kumar, Carl G. Simon Jr., Michael S. Waters, Tanya M. Farooque, Marian F. Young
We demonstrate that imparting freeform fabricated (FFF) scaffolds with surface roughness on their struts enhances osteogenic differentiation of primary human bone marrow stromal cells (hBMSCs) by controlling cell shape. Previous work showed that hBMSCs

Hydration Water Freezing in Single Supported Lipid Bilayers

March 1, 2012
Author(s)
Laura Toppozini, Clare L. Armstrong, Martin D. Kaye, Madhu Sudan Tyagi, Timothy Jenkins, Maikel C. Rheinstadter
We present a high temperature and high energy resolution neturon scattering investigation of hydration water freezing in single supported lipid bilayers. Single supported lipid bilayers provide a well defined biological interface to study hydroation water

Light a Single Candle: Studying Supernovae

March 1, 2012
Author(s)
Dianne M. O'Leary, Bert W. Rust
At peak luminosity, Type Ia supernovae can be even brighter than their parent galaxies, and their light curves display a very uniform and regular behavior. This makes them excellent candidates for a role as standard candles in measuring the distances to

Stress propagation in a colloidal suspension under shear

March 1, 2012
Author(s)
William L. George, Pascal Hebraud, Didier Lootens, Mouhamad Khalil, Nicos Martys
The stress propagation in a concentrated attractive colloidal suspension, under shear, is studied using mumerical simulations. A novel way of describing the intercolloidal stress field is proposed and its spatial correlations are studied. An inertia-like

Transmission EBSD from 10 nm domains in a scanning electron microscope

March 1, 2012
Author(s)
Robert R. Keller, Roy H. Geiss
The spatial resolution of electron diffraction within the scanning electron microscope (SEM) has progressed from channelling methods capable of measuring crystallographic characteristics from 10 μm regions to electron backscatter diffraction (EBSD) methods

X-ray and Neutron Reflectivity and Electronic Properties of PCBM-poly(bromo)styrene Blends and Bilayers with Poly(3-hexylthiophene)

March 1, 2012
Author(s)
Stuart B. Kirschner, Nathaniel P. Smith, Kevin A. Wepasnick, Howard E. Katz, Brian Kirby, Julie Borchers, Daniel H. Reich
We used neutron reflectivity to complement x-ray reflectivity characterization of PCMB-based layers formed on poly(3-hexylthiophene) (P3HT). Single-layer analyses were used to provide reliable scattering length density values for bilayer fitting. Atomic

Fitting EXAFS data using molecular dynamics outputs and a histogram approach

February 29, 2012
Author(s)
Bruce D. Ravel, Stephen W. Price, Nicholas Zonias, Chris-Kriton Skylaris, Andrea Russell
It has been shown that for highly disordered systems, EXAFS underestimates coordination number and thus particle size when compared with the theoretical coordination number based on size determination from other experimental techniques1-4. Similarly, when

The 2009 Materials Science &Technology Conference & Exhibition (MS&T09)

February 29, 2012
Author(s)
Winnie Wong-Ng
The 2009 Materials Science and Technology Conference and Exhibition (MS&T09) took place at the David L. Lawrence Convention Center in Pittsburgh , Pennsylvania, from October 25-29. The Conference was the leading forum addressing structure, properties

VCI Simulation with Semiconductor Device Models: Test Report

February 29, 2012
Author(s)
John S. Villarrubia
JMONSEL, an electron beam imaging simulator, has been modified to permit conducting regions of a sample to be designated as unconnected to an external source or sink of charge (floating) or, alternatively, to be connected with a user-specified relaxation
Displaying 22601 - 22625 of 74178