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Displaying 38376 - 38400 of 73929

Elastic, Anelastic, Piezoelectric Coefficients of Monocrystal Lithium Niobate

October 1, 2004
Author(s)
H M. Ledbetter, H Ogi, N Nakamura
Using improved acoustic spectroscopy, we determined the complete above coefficients (16 independent ones) by measuring the macroscopic resonance frequencies of a single lithium-niobate monocrystal. The improvement consisted of using laser-Doppler

Electrical material property measurements using a free-field, ultra-wideband system

October 1, 2004
Author(s)
Chriss A. Grosvenor, Robert T. Johnk, David R. Novotny, Seturnino Canales, James R. Baker-Jarvis, Michael D. Janezic, Jim L. Drewniak, Marina Kolednitseva, Jianmin Zhang, Poornachander Rawa
Abstract: Nondestructive measurements of materials using TEM horn antennas and an ultra-wideband measurement system are presented. Time-domain gating and genetic algorithms are used to process the data and extract the dielectric properties of the material

Evaluation of Elastic Modulus and Hardness of Thin Films By Nanoindentation

October 1, 2004
Author(s)
Yeon-Gil G. Jung, Brian R. Lawn, M Martyniuk, H Huang, X Z. Hu
Simple equations are proposed for determining elastic modulus and hardness properties of thin films on substrates from nanoindentation experiments. The empirical formulation relates the modulus E and hardness H of the film/substrate bilayer to

Fatigue and Damage Tolerance of Y-TZP Ceramics in Layered Biomechanical Systems

October 1, 2004
Author(s)
Yu Zhang, Antonia Pajares, Brian R. Lawn
The fatigue properties of fine-grain Y-TZP in cyclic flexural testing are studied. Comparative tests on a coarser-grain alumina provide a baseline control. A bilayer configuration with ceramic plates bonded to a compliant polymeric substrate and loaded

Feasibility Study for the Development of a Motion Imagery Quality Metric

October 1, 2004
Author(s)
J Irvine, Charles D. Fenimore, D Cannon, John W. Roberts, S Israel, L Simon, C Watts, J Miller, A I. Aviles, P F. Tighe, R J. Behrens
The motion imagery community would benefit from the availability of standard measures for assessing image interpretability. The National Imagery Interpretability Rating Scale (NIIRS) has served as a community standard for still imagery, but no comparable

Fermi Level Alignment and Electronic Levels in Molecular Wire Self-Assembled Monolayers on Au

October 1, 2004
Author(s)
Christopher D. Zangmeister, Steven W. Robey, Roger D. van Zee, Yuxing Yao, J M. Tour
A combination of one- and two-photon photoelectron spectroscopies are used to determine the electronic structure around the Fermi level for self-assembled monolayers of a prototypical molecular wire , 4,4 -(ethynylphenyl)-1-benzenethiol (C6H5-C≡C-C6H4-C≡C-

Final Report on CIPM Key Comparison of 1 kg Standards in Stainless Steel (CCM.M-K1)

October 1, 2004
Author(s)
R S. Davis, C Aupetit, L O. Becerra, W Bich, N Bignell, G D. Chapman, J.-H. Chung, J Coarasa, Stuart Davidson, N G. Domostroeva, Kitty Fen, M Glaser, W G. Lee, M Lecollinet, Q Li, R Spurny, J Verbeek, Zeina J. Kubarych, A Ooiwa, A Torino
This report describes a Key Comparison of 1 kg standards in stainless steel undertaken by the Consultative Committee on Mass and Related Quantities (CCM) and piloted by the Bureau International des Poids et Mesures (BIPM). The comparisons were carried ou

Gene Expression Profiles of Cells in Response to Tyrosine Polycarbonate Blends

October 1, 2004
Author(s)
Matthew Becker, L A. Bailey, N Washburn, J Kohn, Eric J. Amis
The evaluation and identification of detrimental interactions between biological species and synthetic surfaces is a daunting challenge as the number of materials and control of physical variables increases. In this talk, the physical properties of

Grid Computing

October 1, 2004
Author(s)
Christopher E. Dabrowski
The National Software Reference Library (NSRL) of the U.S. National Institute of Standards and Technology (NIST) collects software from various sources and publishes file profiles computed from this software (such as MD5 and SHA-1 hashes) as a Reference

Ground and First Excited Torsional States of Acetamide

October 1, 2004
Author(s)
Vadim V. Ilyushin, E A. Alekseev, S K. Dyubko, I Kleiner, Jon T. Hougen
Recent progress in measuring, assigning and fitting the millimeter wave spectrum of the ground, first and second excited torsional states of the acetamide molecule CH3CONH2 is reported. New measurements of the acetamide spectrum have been carried out

Guide to Public Safety Applications of Wireless Technology

October 1, 2004
Author(s)
Leonard E. Miller
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

High-contrast dark resonances in s+ -s- optical field

October 1, 2004
Author(s)
S. Kargapoltsev, John Kitching, Leo W. Hollberg, A. V. Taichenachev, V L. Velichanski, V. I. Yudin
For application to atomics clocks, it is important to have large amplitude and small width of the CPT resonance. In this paper, we show that the contrast and amplitude of the dark resonance can be significantly increased in a miniature buffer gas cell by

Horizontal Growth and In Situ Assembly of Oriented Zinc Oxide Nanowires

October 1, 2004
Author(s)
Babak Nikoobakht, Chris A. Michaels, Stephan J. Stranick, Mark D. Vaudin
The positioning and directed assembly of semiconductor nanowires (NWs) is of considerable current interest for bottom-up approaches to the engineering of intricate structures from nanoscale building blocks. We report a horizontal growth mode for ZnO NWs on
Displaying 38376 - 38400 of 73929
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