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Displaying 24876 - 24900 of 74176

Light-Controlled Protein Dynamics Observed with Neutron Spin Echo Measurements

August 2, 2011
Author(s)
Shao-Chun Wang, Panteha Mirarefi, Antonio Faraone, Jr. Lee
A photo-responsive surfactant has been used as a means to control protein structure and dynamics with light illumination. This cationic azobenzene surfactant, azoTAB, which undergoes a reversible photoisomerization upon exposure to the appropriate

Molecular Spin Excitations in the Orbitally Frustrated Spinel GeCo 2O d4^

August 2, 2011
Author(s)
K. Tomiyasu, Michael K. Crawford, D.T. Adroja, P. Manuel, A. Tominaga, S. Hara, H. Sato, T. Watanabe, S. I. Ikeda, Jeffrey W. Lynn, K. Iwasa, K Yamada
We describe powder and single-crystal inelastic neutron scattering experiments on a spinel-type antiferromagnet GeCo 2O 4 with orbital degrees of freedom, which is a candidate for a geometrically orbitally frustrated system. Several types of short-range

Precision spectroscopy with frequency combs at 3.4 ym

August 2, 2011
Author(s)
Esther Baumann, Fabrizio R. Giorgetta, William C. Swann, Alexander M. Zolot, Ian R. Coddington, Nathan R. Newbury
We discuss precision spectroscopy with a comb-based spectrometer at 3.4 υm. Our goal is to explore comb-based spectroscopy as an alternative method for fast, highly resolved, accurate measurements of gas line shapes. The spectrometer uses dual 1.5 υm

Thermodynamic properties of adamantane revisited

August 2, 2011
Author(s)
Vladimir Diky, Ala B. Bazyleva, Andrey V. Blokhin, Gennady J. Kabo, Mikhail B. Charapennikau, Vladimir N. Emel'yanenko, Sergey P. Verevkin
The heat capacity and parameters of the solid-to-solid phase transition of adamantane were measured in the temperature range (80 to 370) K using adiabatic calorimetry. The thermodynamic functions for the compound in the crystalline and liquid states were

A Simple Series Resistance Extraction Methodology for Advanced CMOS Devices

August 1, 2011
Author(s)
Jason P. Campbell, Kin P. Cheung, John S. Suehle, A Oates
Series resistance has become a serious obstacle inhibiting the performance of advanced CMOS devices. However, series resistance quantification in these same advanced CMOS devices is becoming exceedingly difficult. In this study, we demonstrate a very

A Special Functions Handbook for the Digital Age

August 1, 2011
Author(s)
Ronald F. Boisvert, Charles W. Clark, Daniel W. Lozier, Frank W. Olver
The NIST Digital Library of Mathematical Functions (DLMF) is a reference work providing information on the properties of the special functions of applied mathematics. It is a successor to the highly successful NBS Handbook of Mathematical Functions

Cell Adhesion to Borate Glasses by Colloidal Probe Microscopy

August 1, 2011
Author(s)
Sheldon M. Wiederhorn, Carl G. Simon Jr., Young-Hun Chae
The adhesion of Osteoblast-like cells to silicate and borate glasses was measured using colloidal probe microscopy in a cell growth medium. The probe consisted of silicate and borate glass spheres, 25 µm to 50 µm in diameter, attached to the tip of an

Development of a Seebeck Coefficient Standard Reference Material (SRM)

August 1, 2011
Author(s)
Nathan Lowhorn, Winnie Wong-Ng, John Lu, Joshua B. Martin, Martin L. Green, John E. Bonevich, Evan L. Thomas, Neil Dilley, Jeff Sharp
We have successfully developed a Seebeck coefficient Standard Reference Material (SRM™), Bi2Te3, that is essential for interlaboratory data comparison and for instrument calibration. Certification measurements were performed using a differential steady

Effect of Alternating Ar and SF6/C4F8 Gas Flow in Si Nano-Structure Plasma Etching

August 1, 2011
Author(s)
Lei Chen, Vincent K. Luciani, Houxun H. Miao
Si is very reactive to normal plasma etchants such as fluorine based chemicals and the reactions are inherently isotropic. To fabricate small and/or high aspect ratio nanoscale structures in Si, anisotropic profile is necessary. SF6 combined with C4F8 has

Effect of sample conditioning on the water absorption of concrete

August 1, 2011
Author(s)
Javier Castro, Dale P. Bentz, Jason Weiss
ASTM C1585 is commonly used to determine the absorption and rate of absorption of water in unsaturated hydraulic cement concretes. ASTM C1585 preconditions the samples for a total of 18 days. Unfortunately however, the range of relative humidities that can

GaN Nanowires Grown by Molecular Beam Epitaxy

August 1, 2011
Author(s)
Kristine A. Bertness, Norman A. Sanford, Albert Davydov
The unique properties of GaN nanowires grown by molecular beam epitaxy are reviewed. These properties include the absence of residual strain, exclusion of most extended defects, long photoluminescence lifetime, low surface recombination velocity,and high

Optimization of Cement and Fly Ash Particles to Produce Sustainable Concretes

August 1, 2011
Author(s)
Dale P. Bentz, Andrew Hansen, John Guynn
In the drive to produce more sustainable concretes, considerable emphasis has been placed on replacing cement in concrete mixtures with more sustainable materials, both from a raw materials cost and a CO2 footprint perspective. High volume fly ash
Displaying 24876 - 24900 of 74176
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