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Displaying 49801 - 49825 of 73832

Effect of Surface Free Energy Anisotrophy on Dendrite Tip Shape

August 1, 1999
Author(s)
Richard J. Braun, J Zhang, John W. Cahn, Geoffrey B. McFadden, A A. Wheeler
We describe a mean field, free energy model that allows the computation of realistic phase diagrams for a particular set of ordering transitions in face-centered-cubic (FCC) binary alloys. The model is based on a sixth-order Landau expansion of the free

Effects of Cement PSD on Porosity Percolation and Self-Desiccation

August 1, 1999
Author(s)
Dale P. Bentz
The degree of self-desiccation in field concrete depends on the availability of external water to replace that consumed due to the chemical shrinkage that occurs during cement hydration. As the cement hydrates, the capillary porosity depercolates

Electrical Measurements for Electronic Interconnections at NIST

August 1, 1999
Author(s)
Dylan Williams, Donald C. DeGroot
The National Institute of Standards and Technology (NIST) operates a number of research projects to advance measurement science and technology for the microelectronic industry. Here we will summarize (1), report on one component of the NIST program, the

Empirical Modeling of Electromagnetic Accoustic Transducer Data

August 1, 1999
Author(s)
Kevin J. Coakley, A V. Clark, C S. Hehman
We characterize the observed phase and amplitude of acoustic birefringence data collected with an electromagnetic acoustic transducer (EMAT). Our characterization models are extended versions of an idealized model for acoustic birefringence. In the

Guidelines for the Use of the Internet by IUPAC Bodies (Technical Report)

August 1, 1999
Author(s)
A N. Davies, Stephen R. Heller, J W. Jost
The rapid development of the Internet as a major communication tool between scientists has led to the need for co-ordinated IUPAC presence. Many diverse groups have already initiated distribution of IUPAC related material via their Web sites. These

High Q Backside Micromachined CMOS Inductors

August 1, 1999
Author(s)
Mehmet Ozgur, Mona E. Zaghloul, Michael Gaitan
Spiral inductors that are fabricated through a CMOS process, are micromachined by using a new post-processing procedure. In this new technique, the inductors are supported mechanically prior to etching with a low-loss host superstrate, and the silicon

Industrial Sludge Reference Material for the Analysis of Acid-Extractable Metals

August 1, 1999
Author(s)
Stuart J. Nagourney, N J. Tummillo, J Birri, K Peist, Bruce S. MacDonald, J S. Kane
An interlaboratory study to develop NIST reference values using NJDEP and USEPA methods to obtain values for the extractable concentrations of metals insludge is described. Industrial waste containing high concentrations of alkali, alkaline earth, ferrous

Influence of Secondary Tip Shape on Illumination-Mode Near-Field Scanning Optical Microscopy Images

August 1, 1999
Author(s)
Lee J. Richter, C E. Dentinger, Richard R. Cavanagh, Garnett W. Bryant, A Liu, Stephan J. Stranick, C D. Keating, M J. Natan
We report illumination-mode near-field optical microscopy images of individual 80-115 nm diameter Au particles recorded with metal-coated fiber probes. It is found that the images are strongly influenced by the metal-coating thickness. This dependence is

Measurement as Inference: Fundamental Ideas

August 1, 1999
Author(s)
William T. Estler
We review the logical basis of inference as distinct from deduction, and show that measurements in general, and dimensional metrology in particular, are best viewed as exercises in probable inference: reasoning from incomplete information. The result of a

Micro-Mechanic Model for Cathodic Blister growth in Painted Steel

August 1, 1999
Author(s)
Tze J. Chuang, Tinh Nguyen, S K. Lee
A micro-mechanic blister growth model is proposed for a coating system consisting of a polymer film applied to a steel substrate exposed to salt solutions. The mechanism of the blister formation is based on corrosion-induced disbondment of the coating at

Multilayers: Interlayer Coupling

August 1, 1999
Author(s)
P Grunberg, Daniel T. Pierce
The extensive research done on interlayer exchange coupling in transition metal multilayers has resulted in a deep understanding of this coupling and a remarkable agreement between theoretical results and measurements. The coupling between two magnetic

NIST Indices of NTEP Device Evaluations

August 1, 1999
Author(s)
L T. Sebring, Tina G. Butcher, H V. Oppermann
This publication contains index listings for all devices that have been type evaluated under the National Type Evaluation Program (NTEP) from January 1, 1986 through August 3, 1999. It replaces all previous editions and supplements (except copies of

Optimization of CMOS MEMS Microwave Power Sensors

August 1, 1999
Author(s)
V. Milanovic, M. Hopcroft, C. A. Zincke, Michael Gaitan, Mona E. Zaghloul
Micromachined power sensors with operation up to 50 GHz were recently achieved in CMOS technology. to improve their sensitivity and signal-to-noise ratio, while maintaining microwave performance, several design parameters must be considered, such as the

Optimization of Polymer Concrete Composites: Final Report

August 1, 1999
Author(s)
L Czarnecki, A Garbacz, P Lukowski, J R. Clifton
The main aim of the study was the development of a method for the design and optimization of polymer concrete composites, using a fundamental approach based on a material model of polymer concrete. The polymer concrete materials were characterized via
Displaying 49801 - 49825 of 73832
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