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Displaying 31451 - 31475 of 74135

Experimental Investigation of Firebrands: Generation and Ignition of Fuel Beds

April 1, 2008
Author(s)
Samuel L. Manzello, Thomas G. Cleary, John R. Shields, Alexander Maranghides, William E. Mell, Jiann C. Yang
A series of real scale fire experiments were performed to determine the size and mass distribution of firebrands generated from Douglas Fir (Pseudotsuga menziesii) trees. The results of the real scale fire experiments were used to determine firebrand sizes

Measurements to Support Modulated-Signal Radio Transmissions for the Public-Safety Sector

April 1, 2008
Author(s)
Catherine A. Remley, Galen H. Koepke, Christopher L. Holloway, Chriss A. Grosvenor, Dennis G. Camell, John M. Ladbury, Robert Johnk, David R. Novotny, William F. Young, George Hough, Michael McKinley, Yann Becquet, John Korsnes
We report on measurements of parameters utilized for characterization of broadband wireless technologies proposed for use by emergency responders (firefighters, police, and emergency medical personnel) and other public-safety personnel. We designed a

Mechanism for spontaneous growth of GaN nanowires with molecular beam epitaxy

April 1, 2008
Author(s)
Kristine A. Bertness, Alexana Roshko, Lorelle Mansfield, Todd E. Harvey, Norman A. Sanford
Although most semiconductor nanowires are grown via the vapor-liquid-solid mechanism, we present evidence that GaN nanowires form because of thermodynamically driven variations in surface sticking coefficients on different crystallographic planes under

Physical Properties of LnAg y X 4-y (Ln =La, Ce; X = Al, Ga; y 0.72)

April 1, 2008
Author(s)
Jung Y. Cho, Monica Moldovan, David P. Young, Nathan Lowhorn, Julia Y. Chan
Single crystals of LnAg(y)X(4-y) (Ln = La, Ce; X = Al, Ga; y 0.72) were synthesized by aluminum or gallium flux and characterized by single crystal X-ray diffraction. LnAg(y)X(4-y) (Ln = La, Ce; X = Al, Ga; y 0.72) crystallize in the tetragonal space group

Probing the dynamic fluorescence properties of single water-soluble quantum dots

April 1, 2008
Author(s)
J R. Krogmeier, Hyeong G. Kang, Matthew L. Clarke, p Yim, Jeeseong Hwang
The influence of surface modifications, including carboxyl-, amine-, and mercaptoundecanoicacid-functionalized chemistries, on the dynamic fluorescence properties of single quantum dots (QDs) are probed using a combined confocal fluorescence microscopy and

Proceedings of Static Analysis Summit II

April 1, 2008
Author(s)
Paul E. Black, Elizabeth N. Fong
Static Analysis Summit II was held 8 and 9 November 2007. The workshop had a keynote address by Professor William Pugh, paper presentations, discussion sessions, a panel on Obfuscation Versus Analysis Who Will Win? , and a new technology demonstration fair

Selecting a Primary Frequency Standard for a Calibration Laboratory

April 1, 2008
Author(s)
Michael A. Lombardi
Calibration laboratories can choose from a variety of frequency standards, including quartz oscillators, atomic oscillators, and oscillators disciplined to agree with reference signals from the Global Positioning System (GPS) satellites or other sources

Size Separation of Single Wall Carbon Nanotubes by Flow-Field Flow Fractionation

April 1, 2008
Author(s)
Jae H. Chun, Jeffrey A. Fagan, Erik K. Hobbie, Barry J. Bauer
Flow-field flow fractionation (Flow-FFF) is used to separate single wall carbon nanotubes (SWNTs) dispersed in aqueous medium by the use of DNA. On-line measurements are made of SWNT concentration, molar mass, and size by using UV-Vis absorption and multi

Spin Transfer Torques

April 1, 2008
Author(s)
Daniel C. Ralph, Mark D. Stiles
This tutorial article is designed for beginning graduate students who are interested in the physics of spin transfer torques in magnetic devices. We provide an elementary discussion of the mechanism of spin transfer torque, and review the theoretical and

The International System of Units (SI), 2008 Edition

April 1, 2008
Author(s)
Barry N. Taylor
The definitive international reference on the SI is a booklet published by the International Bureau of Weights and Measures (BIPM, Bureau International des Poids et Mesures) and often referred to as the BIPM SI Brochure. Entitled Le Systeme International d

Understanding IEEE 1451 - Networked Smart Transducer Interface Standard

April 1, 2008
Author(s)
Yuyin Song, Kang B. Lee
In response to industry's need for standardized sensor interfaces, a suite of smart transducer interface standards for transducers (sensors and actuators), known as the IEEE 1451, has been developed by the Institute of Electrical and Electronics Engineers

Wide-Bandwidth Coaxial PWB Transmission Line Probe

April 1, 2008
Author(s)
Nicholas Paulter, Robert H. Palm, Dwight D. Barry
The design, fabrication, and test of a wide bandwidth (3 dB attenuation bandwidth =>30 GHz) , 50 ohm, coaxial probe for the electrical characterization of printed wiring board (PWB) transmission lines is described. The probe can make thousands of repeated

X-Ray Imaging Optimization of 3D Tissue Engineering Scaffolds via Combinatorial Fabrication Methods

April 1, 2008
Author(s)
Yanyin Yang, Shauna M. Dorsey, Matthew Becker, Sheng Lin-Gibson, Gary E. Schumacher, Glenn M. Flaim, J Kohn, Carl G. Simon Jr.
We have developed a combinatorial method for determining optimum tissue scaffold composition for imaging by X-ray techniques. X-ray radiography and microcomputed tomography enable non-invasive imaging of implanted materials in vivo and in vitro

Correlation Between Microstructure, Electronic Properties and Ficker Noise in Organic Thin Film Transistors

March 31, 2008
Author(s)
Oana Jurchescu, Behrang H. Hamadani, Hao Xiong, Sungkyu Park, Sankar Subramanian, Neil M. Zimmerman, John E. Anthony, Thomas Jackson, David J. Gundlach
We report on observations of a direct correlation between the microstructure of the organic thin films and their electronic properties when incorporated in field-effect transistors. We present a simple method to induce enhanced grain growth in solution
Displaying 31451 - 31475 of 74135
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