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Displaying 38601 - 38625 of 74223

Dynamic behavior of dagger-shaped atomic force microscope cantilevers

October 20, 2004
Author(s)
K Shen, Donna C. Hurley, J Turner
Experimental techniques based on the atomic force microscope (AFM) have been developed for characterizing mechanical properties at the nanoscale and applied to a variety of materials and structures. Atomic force acoustic microscopy (AFAM) is one such

Validation of the Receprocity Law for Coating Photodegradation

October 20, 2004
Author(s)
Joannie W. Chin, Tinh Nguyen, Jonathan W. Martin, E Byrd
Accelerating the photodegradation of commerical polymeric materials has great practical importance in the weathering community. However, questions exist as to whether high radiant flux exposure results cn be extrapolated to in-service exposure levels

Station Nightclub Fire Investigation Status Report.

October 19, 2004
Author(s)
William L. Grosshandler
National Construction Safety Team (NCST) Advisory Committee Meeting, Presentation: The Station Nightclub Fire Investigation Status Report, October 20, 2004

Crystal Chemistry and Crystallography of the Aurivillius Phase Bi 5 AgNb 4 O 18

October 18, 2004
Author(s)
Winnie K. Wong-Ng, Qingzhen Huang, Lawrence P. Cook, Igor Levin, James A. Kaduk, Alan D. Mighell, J Suh
Bi 5AgNb 4O 18 is a new phase, which was discovered during the phase equilibrium study of the Bi 2O 3-Ag 2O-Nb 2O 5 system. Bi 5AgNb 4O 18 was prepared at 750 C and is stable in air up to its melting temperature of 1160.1 5.0 C. Results of a Rietveld

Reference Scaffolds for Characterization of Porosity (Poster)

October 18, 2004
Author(s)
John A. Tesk
ASTM Task Force F04.42.06 was formed with the objective of developing reference scaffolds, with the initial thrust focused on porosity.Three dimensional test-scaffolds were fabricated by two 3-Dimensional rapid prototyping methods. Visual examinations and

Estimating Multiple-Reflection Uncertainties in Spherical Near-Field Measurements

October 17, 2004
Author(s)
Michael H. Francis, Jeffrey R. Guerrieri, Katherine MacReynolds, Ronald C. Wittmann
We propose a method to estimate multiple-reflection effects on test-antenna pattern and gain uncertainties in the far field derived from spherical near-field measurements. To estimate these uncertainties we make a near-field measurements on two spheres

Practical Implementation of Probe-Position Correction in Near-field Planar Scanning Measurements

October 17, 2004
Author(s)
Jeffrey R. Guerrieri, Katherine MacReynolds, Michael H. Francis, Ronald C. Wittmann, Douglas T. Tamura
Planar near-field measurements require taking amplitude and phase data on an accurate and equal space grid on the plane in front of the antenna under test. The position accuracy on this grid has been determined to be '/50. As frequencies become higher

Adaptive Road Detection through Continuous Environment Learning

October 15, 2004
Author(s)
M Foedissch, A Takeuchi
The Intelligent Systems Division of the National Institute of Standards and Technology has been engaged for several years in developing real-time systems for autonomous driving. A road detection program is an essential part of the project. Previously we

New Insights into Threshold Voltage Shifts for Ultrathin Gate Oxides

October 15, 2004
Author(s)
Da-Wei Heh, Eric M. Vogel, J B. Bernstein
Threshold voltage (Vth) shifts of p- and n-channel MOSFETs during a stress are analyzed from both experiment and simulation. The result of the analysis showed that Vth shift is mainly induced by the carrier channel mobility degradation. This result can
Displaying 38601 - 38625 of 74223
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