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Displaying 45676 - 45700 of 143806

Density and Speed of Sound Measurements of Two Synthetic Aviation Turbine

June 29, 2011
Author(s)
Stephanie L. Outcalt, Tara J. Fortin
Rising prices and the uncertain supply of petroleum based aviation fuels have led to an interest in substitute fuels made from non-petroleum sources. Synthetic isoparaffinic kerosenes (S-IPK) are among the most promising alternatives. Two instruments were

Formation of stacking faults and their correlation with flux-pinning and critical current density for Sm-doped YBa2Cu3O7-x films

June 29, 2011
Author(s)
Winnie K. Wong-Ng, Sung H. Wee, Eliot D. Specht, Claudia Cantoni, Jonathan Zuegel, Victor Maroni, Guangyao Liu, Timothy J. Haugan, Amit Goyal
A correlation between flux-pinning characteristics and stacking faults (SFs) formed by Sm substitution on Y and Ba sites was found in Sm-doped YBCO films. It was confirmed that “223” type SFs, Y2Ba2Cu3Ox, composed of Y and O extra planes aligned parallel

Guided three-dimensional catalyst folding during Metal assisted Chemical Etching of Silicon

June 28, 2011
Author(s)
Konrad Rykaczewski, Owen J. Hildreth, Ching P. Wong, Andrei G. Fedorov, John H. Scott
In order to fabricate truly complex three-dimensional (3D) silicon nanostructures fabrication methods which expand beyond the concept of creation of straight 3D structures by direct extension of two dimensional (2D) patterns need to be developed. In recent

Guidelines for Protecting Basic Input/Output System (BIOS) Firmware

June 28, 2011
Author(s)
Shirley M. Radack
This bulletin summarizes the information presented in NIST Special Publication (SP) 800-147, BIOS Protection Guidelines: Recommendations of the National Institute of Standards and Technology. The publication was written by David Cooper, William Polk

Quantitative Determination of Competitive Molecular Adsorption on Gold Nanoparticles Using Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy

June 28, 2011
Author(s)
De-Hao D. Tsai, Melissa Davila-Morris, Frank W. DelRio, Suvajyoti S. Guha, Vincent A. Hackley, Michael R. Zachariah
Surface-sensitive quantitative studies of competitive molecular adsorption on nanoparticles were conducted using a modified Attenuated attenuated Total total Reflectionreflectance-Fourier Transform transform Infrared infrared (ATR-FTIR) spectroscopy method

Violation of the Condon Approximation in Semiconducting Carbon Nanotubes

June 28, 2011
Author(s)
Ming Zheng
A long-held but untested fundamental assumption in Raman spectroscopy of carbon nanotubes is that intensities arising from resonance with incident and scattered photons are equal. We present here the first complete Raman excitation profiles (REPs) for the

Generation of Ultrastable microwaves via optical frequency division

June 26, 2011
Author(s)
Tara Fortier, Matthew S. Kirchner, Jennifer A. Taylor, James C. Bergquist, Yanyi Jiang, Andrew Ludlow, Christopher W. Oates, Till P. Rosenband, Scott Diddams, Franklyn Quinlan, Nathan D. Lemke
A frequency-stabilized femtosecond laser optical frequency comb serves as a source of microwave signals having very low close-to-carrier phase noise. Comparison of two independent systems shows combined absolute phase noise of -100 dBc/Hz at an offset of 1

Understanding the Fire Hazards of Grouped Electrical Cables

June 26, 2011
Author(s)
Kevin B. McGrattan, David Stroup
CHRISTIFIRE (Cable Heat Release, Ignition, and Spread in Tray Installations during FIRE) is an Office of Nuclear Regulatory Research (RES, US NRC) program to quantify the mass and energy released from burning electrical cables. The experimental program has

Antiferromagnetic Spin Excitations in Single Crystals of Nonsuperconducting Li 1-x FeAs

June 24, 2011
Author(s)
Meng Wang, X. C. Wang, D. L. Abernathy, L. W. Harriger, H. Q. Luo, Yang Zhao, Jeffrey W. Lynn, Q. Q. Liu, C. Q. Jin, Chen Fang, Jianping Hu, Pengcheng Dai
We use neutron scattering to determine spin excitations in single crystals of nonsuperconducting Li 1¿xFeAs throughout the Brillouin zone. Although angle resolved photoemission experiments and local density approximation calculations suggest poor Fermi
Displaying 45676 - 45700 of 143806
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