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Displaying 501 - 525 of 1184

FATIGUE CRACK GROWTH OF TWO X52 PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

September 9, 2012
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Neha N. Rustagi, Damian S. Lauria, Joseph D. McColskey, Robert L. Amaro
Fatigue crack growth tests were conducted on two API 5L X52 pipeline steel alloys. One alloy was from a new linepipe that was installed for hydrogen service in 2011. The other alloy was from a vintage pipe that first saw natural gas service in 1964

An LC-ESI/MS Method for Determining Theanine in Green Tea Dietary Supplements

April 28, 2010
Author(s)
Mary Bedner, Lane C. Sander, Katherine E. Sharpless
Theanine is the major amino acid present in Camellia sinensis, or green tea. A method for determining theanine in its native state using liquid chromatography with positive-mode electrospray ionization mass spectrometric detection was developed

Comb-Generator Characterization

February 1, 2008
Author(s)
Howard C. Reader, Dylan Williams, Paul D. Hale, Tracy S. Clement
We characterize a 50 GHz comb generator measured on a sampling oscilloscope. With careful control of the input power, input harmonics and comb generator temperature, we find the output spectrum to be stable to 0.1 dB and 0.5 degrees. We correct results for

Towards Development of an ISO Container to Spreader Bar Sensor System

June 12, 2007
Author(s)
Richard J. Norcross
This report describes a sensor system that determines the relative pose between a crane spreader and an ISO container. The sensor system supports efforts to transfer cargo between ships in high sea states under ONR s HiCASS program. The sensor system is a

X-Ray Induced Fluorescence Measurement of Segregation in a DyI3 Metal-Halide Lamp

April 19, 2007
Author(s)
T Nimalisuriya, John J. Curry, Craig J. Sansonetti, E J. Ridderhof, S Shastri, A J. Flikweert, W W. Stoffels, M Haverlag, J J. van der Mullen
X-ray induced fluorescence measurements, using high energy synchrotron radiation generated on the Sector 1 Insertion Device beamline at the Advanced Photon Source, were performed on a metal-halide lamp containing Hg and DyI$_3}$. Density distributions of

Long-distance quantum key distribution in optical fibre

September 14, 2006
Author(s)
Philip A. Hiskett, Danna Rosenberg, Charles G. Peterson, Richard J. Hughes, Jane E. Nordholt, Sae Woo Nam, Adriana Lita, Aaron J. Miller
… an error-corrected, privacy-amplified key over 148.7 km of dark optical fibre at a mean photon number υ = 0.1, …

Correlation for the Vapor Pressure of Mercury

September 12, 2006
Author(s)
Marcia L. Huber, Arno D. Laesecke, Daniel G. Friend
We present a new correlation for the vapor pressure of mercury that is valid from the triple point to the critical point. The equation is a Wagner-type form, where the terms of the equation are selected using a simulated annealing optimization algorithm

Anomalous Switching Behavior of Antiparallel-Coupled CO Layers Separated by a Super-Thin Ru Spacer

May 15, 2002
Author(s)
V S. Gornakov, Valerian I. Nikitenko, William F. Egelhoff Jr., Robert D. McMichael, Alexander J. Shapiro, Robert D. Shull
The details of the magnetization reversal mechanisms upon field reversal in coupled ferromagnetic CO (2.5 nm)/Ru(0.5 nm)/Co (2.6 nm) trilayers deposited on obliquely sputtered Ta (10.6 nm) underlayers were studied using the magneto-optical indicator film

Multifilmamentary Nb 3 Sn wires reacted in hydrogen gas

May 1, 2002
Author(s)
M Takayasu, R G. Ballinger, Ronald B. Goldfarb, A. A. Squitieri, P. J. Lee, David C. Larbalestier
Reaction of Nb 3Sn wires in an Icology 908 conduit in the presence of oxygen can decrease the conduit's fracture toughness. This may be avoided by reacting in a reducing atmosphere of 5% hydrogen-95% argon. The effects of the hydrogen reaction on the

AlGaN Schottky Diodes for Short-Wavelength UV Applications

June 1, 2001
Author(s)
P P. Chow, J J. Klaassen, Robert E. Vest, J M. VanHove, A Wowchak, C Polley
High performance ultraviolet (UV) detectors have been fabricated using plasma-enhanced molecular beam epitaxy (MBE). The realized AlGaN Schottky detectors exhibit high responsivity, sharp spectral cutoff and high shunt resistance of several giga-ohns for 0

Fibers, Percolation, and Spalling of High-Performance Concrete

May 1, 2000
Author(s)
Dale P. Bentz
While the strength and durability of high performance concretes (HPCs) are often greatly superior to conventional concretes under ambient conditions, their failure is sometimes rapid and dramatic during exposure to a fire, characterized by the explosive

Low-Temperature Elastic Coefficients of Polycrystalline Indium

November 1, 1997
Author(s)
K Sudook, H M. Ledbetter
Using an ultrasonic pulse-echo method, we measured the elastic coefficients of polycrystalline indium from 300 to 5K. All elastic coefficients showed regular temperature behavior, as predicted by an Einstein-oscillator model. The shear and Young moduli

Growth of GMR Spin Valves using Indium as a Surfactant

January 1, 1996
Author(s)
William F. Egelhoff Jr., P J. Chen, Cedric J. Powell, Mark D. Stiles, Robert McMichael
We have investigated the use of In as a surfactant to achieve smoother interfaces in spin-valve multilayers of the general type: FeMn/Ni 80Fe 20/Co/Cu/Co/Ni 80Fe 20/glass. The coupling field is reduced from 0.8 to 0.3 mT, presumably by suppressing
Displaying 501 - 525 of 1184
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