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Displaying 45126 - 45150 of 73960

Graded Microstructure and Mechanical Properties of Human Crown Dentin

September 1, 2001
Author(s)
W Tesch, Naomi Eidelman, P Roschger, F Goldenberg, K Klaushofer, P Fratzl
The mineralized tissue of intertubular dentin is a collagen-mineral composite with considerable local variations of mechanical properties. Area-scans of human tooth were made by complementary methods to investigate correlations between local mechanical

How Accurately Can Your Interferometer Interpolate Fringes?

September 1, 2001
Author(s)
John R. Lawall
Optical interferometry is the means by which real-world displacements are measured relative to a standard reference wavelength. Most interferometers use a helium-neon laser and generate a signal with a period of half the wavelength, λ/2=316.5 nm. To

Machine Translation Website

September 1, 2001
Author(s)
John S. Garofolo
This paper demonstrates that, for large-scale tests, the match and non-match similarity scores have no specific underlying distribution function. The forms of these distribution functions require a nonparametric approach for the analysis of the fingerprint

Manufacturing of Prostheses

September 1, 2001
Author(s)
Matthew A. Davies, Ronald G. Dixson
This paper is a summary of a workshop session during the Workshop on Biomedical Materials and Devices, held June 13 -14, 2001. The workshop is part of a series of workshops and topical meetings organized by NIST in the area of biomedical technology. The

Measuring T g in Ultra-Thin Polymer Films With an Excimer Fluorescence Technique

September 1, 2001
Author(s)
Christopher C. White, Kalman D. Migler, Wen-Li Wu
An excimer fluorescence technique has been applied to the measurement of T g of ultra-thin polystyrene films. This technique utilizes an excimer-forming molecule with fluorescent emission in two wavelength bands. The intensity ratio of these bands is a

Measuring the Frequency Response of Gigabit Chip Photodiodes

September 1, 2001
Author(s)
Paul D. Hale, Tracy S. Clement, Dylan F. Williams, E. Balta, N. D. Taneja
We describe a calibratin and measurement procedure for determining the intrinsic frequency response fo gigabit chip photodiodes embedded in simple test fixtures. The procedure is unique because we make the measurements in the time-domain using a calibrated

Measuring the Impact of Information on Complex Systems

September 1, 2001
Author(s)
Albert T. Jones, Larry H. Reeker
The application of power-driven machinery to manufacturing and other areas of human endeavor characterized the Industrial Revolution in the 18th and 19th centuries. Measurement contributed in many ways to the increasing economic influence of these machines

Microstructural Characterization Studies to Relate the Properties of Thermal Spray Coatings to Feedstock and Spray Conditions

September 1, 2001
Author(s)
Andrew J. Allen, Gabrielle G. Long, H Boukari, J Ilavsky, A Kulkarni, S Sampath, H Herman, A N. Goland
This paper reports how the microstructural information, obtainable for thick plasma-sprayed ceramic deposits by small-angle scattering can be used to explore the relationships among the feedstock or spray process conditions, the anisotropic void and crack

Microstructural Properties of (Ba,Sr)Ti0 3 Films Fabricated from BaF 2 /SrF 2 /Ti0 2 Amorphouse Multilayers Using the Combinatorial Precursor Method

September 1, 2001
Author(s)
Ichiro Takeuchi, K S. Chang, R P. Sharma, Leonid A. Bendersky, H C. Chang, X D. Xiang, E A. Stach, C Y. Song
We have investigated the microstructure of (Ba,Sr)Ti0 3 films fabricated from BaF 2/SrF 2/Ti0 2 amorphouse multilayers. Rutherford backscattering spectroscopy and x-ray diffraction studies show that a controlled thermal treatment can interdiffuse the

Molecular Templating of Nanoporous Ultralow Dielectric Constant (approximate to 1.5) Organosilicates by Tailoring the Microphase Separation of Triblock Copolymers

September 1, 2001
Author(s)
S Y. Yang, P A. Mirau, C S. Pai, O Nalamasu, E Reichmanis, Eric K. Lin, V. J. Lee, D W. Gidley, J N. Sun
Triblock polymers, poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (PEO-b-PPO-b-PEO), are used as molecular templates in poly(methyl silsesquioxane) (MSQ) matrices to fabricate nanoporous organosilicates. Initially homogeneous blends of the

MSEL 2001 Programs and Accomplishments: Materials Reliability Division

September 1, 2001
Author(s)
F R. Fickett, Thomas A. Siewert
The materials Reliability Division's mission is to develop and disseminate measurement methods and standards enhancing the quality and reliability of materials and to provide technical leadership in their introduction to appropriate industries. Our main

MSEL FY 2001 Programs and Accomplishments: Metallurgy Division

September 1, 2001
Author(s)
C A. Handwerker, Frank W. Gayle, Richard E. Ricker
This report describes major programs and accomplishments of the Metallurgy Division of the NIST Materials Science and Engineering Laboratory (MSEL) in FY2001 The mission of the NIST Metallurgy Division is to provide critical leadership in the development

MSEL FY 2001 Programs and Accomplishments: Polymers Division

September 1, 2001
Author(s)
B M. Fanconi, Eric J. Amis
The Polymers Division provides measurement methods, standards, and concepts to facilitate technology development, manufacture of products, commerce, and use of synthetic polymers. Projects are selected based on assessments of current needs and in
Displaying 45126 - 45150 of 73960
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