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Displaying 1851 - 1875 of 2965

Probing electric field control of magnetism using ferromagnetic resonance

January 29, 2015
Author(s)
Ziyao Zhou, Morgan Trassin, Ya Gao, Yuan Gao, Diana Qiu, Khalid Ashraf, Tianxiang Nan, Xi Yang, Samuel R. Bowden, Daniel T. Pierce, Mark D. Stiles, John Unguris, Ming Liu, Brandon Howe, Gail Brown, Sayeef Salahuddin, Ramamoorthy Ramesh, Nian Sun
A question of fundamental importance in multiferroic materials, such as BiFeO3, is whether the canted moment arising from the Dzyalozhinski-Moriya coupling is switchable with the application of an electric field. Since this canted moment is weak, directly

Development of Standard Reference Materials for Cement-Based Materials

January 6, 2014
Author(s)
Chiara F. Ferraris, Nicos Martys, William L. George
Rotational rheometers are routinely used for homogeneous materials, but their usage for characterization of a granular fluid like concrete is a relatively new phenomenon. As measurements with rheometers can involve flow in a complex geometry, it is

Absolute calibration of optical power and fluence rate for PDT: Report of AAPM TG140

July 23, 2013
Author(s)
Marla L. Dowell, Timothy Zhu, Christopher Bonnerup, Valdir Colussi, Jarod Finlay, Lothar Lilge, Thomas Slowery, claudio sibata
This report is primarily concerned with methods for optical calibration of laser power and light fluence rate for continuous wave (CW) light sources, predominantly used in photodynamic therapy (PDT). Dosimetry of light is very important for PDT, however

Thermodynamic Properties of o-Xylene, m-Xylene, p-Xylene, and Ethylbenzene

June 27, 2012
Author(s)
Eric W. Lemmon, Yong Zhou, Jiangtao Wu
Equations of state for the xylene isomers (o-xylene, m-xylene, and p-xylene) and ethylbenzene have been developed with the use of the Helmholtz energy as the fundamental property with independent variables of density and temperature. The general

PROBING MATERIAL PROPERTIES WITH SHARP INDENTERS: A REVIEW

January 2, 2012
Author(s)
Brian R. Lawn, Robert F. Cook
A review on the use of sharp, fixed-profile indenters as materials probes is presented. Indentation is proposed as a simple but powerful methodology for evaluating basic mechanical properties—elastic modulus, hardness, toughness, etc.—in all classes of

Microresonator based optical frequency combs

April 29, 2011
Author(s)
Scott A. Diddams, T. J. Klippenberg
Optical frequency combs based on mode-locked laser sources have provided unprecedented measurement capabilities for optical frequencies, enabling new applications in a wide range of topics that include atomic clocks, ultracold gases, molecular

Development Overview of an Information Model for Disassembly

December 23, 2009
Author(s)
Shaw C. Feng, Hanmin Lee, Che B. Joung, P. Ghodous
Manufacturing is a fundamental support of an industrialized society. Currently, manufacturing industry is facing major challenges, such as resources depletion, global climate change, environmental pollution, and social well being for the future generations

Knowledge representation and planning for on-road driving

July 16, 2004
Author(s)
Stephen B. Balakirsky, Christopher J. Scrapper Jr
This paper presents a cost-based adaptive planning agent and knowledge layers that is operating at one level of a deliberative hierarchical planning system for autonomous road driving. At this level, the planning agent is responsible for developing

Reliability of SiC MOS Devices

June 24, 2004
Author(s)
Ranbir Singh, Allen R. Hefner Jr.
Fundamental limitations to oxide reliability are analyzed in silicon carbide based devices. A barrier height primarily determined by band offsets between metal/SiC and the dielectric, and the electric field in the dielectric results in tunneling current

Antenna System Guide

April 1, 2001
Author(s)
W. A. Kissick, W J. Ingram, J M. Vanderau, R D. Jennings, Sharon E. Ellison
… the components of the antenna system as well as the fundamentals and characteristics of the antenna itself. …

Frequency Response Metrology for High-Speed Optical Receivers

March 1, 2001
Author(s)
Paul D. Hale, Tracy S. Clement, Dylan F. Williams
There are two types of optical sources whose modulation can be measured or calculated from fundamental principles: the hererodyne beat between two single- frequency lasers (frequency-domain) and the short pulse from a mode-locked laser (time-domain). While

Dynamic and Static Grain Growth During the Superplastic Deformation of 3Y-TZP

March 1, 1998
Author(s)
J Seidensticker, M J. Mayo
While phenomenological theories of superplasticity have often suffered from the fact that a single phenomenological law is not universally applicable to all superplastic systems, it is shown that a universal dynamic grain growth law does apply. The law is

Backdraft Phenomena. Final Report. 1990-1992.

June 1, 1994
Author(s)
Charles M. Fleischmann
The purpose of this project was to develop a fundamental physical understanding of backdraft phenomena. The research was divided into three phases: exploratory simulations, gravity current modeling, and quantitative backdraft experiments. The primary goal

Structure of Inhibited Counterflowing Nonpremixed Flames

May 11, 1993
Author(s)
Anthony P. Hamins, M H. Yang, I K. Puri
Recent international agreements call for a halt to the manufacture of CF3Br (Halon 1301), a commonly used halon fire suppressant, due to its high ozone-depletion potential. Ideally, the search for replacement compounds should be guided by fundamental
Displaying 1851 - 1875 of 2965
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