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Displaying 46076 - 46100 of 73994

Normal Modes for a Stratified Viscous fluid Layer

February 2, 2001
Author(s)
Katharine F. Gurski, R L. Pego
We consider internal gravity waves in a stratified fluid layer with rigid horizontal boundaries and periodic boundary conditions on the sides at constant temperature with a small constant viscosity, modeled using the incompressible Navier-Stokes equations

85 Rb BEC Near a Feshbach Resonance

February 1, 2001
Author(s)
N R. Claussen, S L. Cornish, J L. Roberts, Eric A. Cornell, C E. Wieman
Bose-Einstein condensation has been achieved in a magnetically trapped sample of 85Rb atoms. Stable condensates of up to 10 4 atoms have been created by using a magnetic-field-induced Feshbach resnance to reverse the sign of the zero-field scattering

A Novel Microshear Test to Measure Dental Adhesion

February 1, 2001
Author(s)
Joseph M. Antonucci, Walter G. McDonough, Gary E. Schumacher, Y Shimada
A key factor in determining the strength and durability of polymeric dental restorative composites, sealants and adhesives is the quality of their interfaces/interphases. Bulk mechanical strength tests such as tensile, transverse and shear tests are

Ab Initio Structure of the Active Site of Phosphotriesterase

February 1, 2001
Author(s)
Morris Krauss
This research exploits two recent developments to obtain a fundamental understanding of the metalloenzyme active site using the bi-metallic enzyme phosphotriesterase as an example of this class. First, is the theoretical prediction that the structure and

Advanced Optics Characterization

February 1, 2001
Author(s)
Angela Davies, Charles S. Tarrio, Christopher J. Evans
Science, commerce, and defense continuously drive the optical community to provide less expensive, more perfect products. High performance optical systems always demand tighter tolerances-and tighter tolerances drive the need for ever better metrology

Alignment of Noisy Signals

February 1, 2001
Author(s)
Kevin J. Coakley, Paul D. Hale
We study the relative performance of various methods for aligning noisy one dimensional signals. In each method, we estimate the relative shifts of a set of signals which are translated with respect to each other. We simulate signals corrupted by both

Analysis of Behavioral Requirements for Component-Based Machine Controllers

February 1, 2001
Author(s)
Frederick M. Proctor, John L. Michaloski, S Birla, G Weinert
Machine controllers built from standardized software components have the greatest potential to reap open architecture benefits - including plug-and-play, reusability and extensibility. A challenge to component-based controllers relates to standardizing

Assurance Hierarchies in B2C Electronic Commerce

February 1, 2001
Author(s)
Gordon E. Lyon, Hai C. Tang
Electronic commerce (e-commerce) is defined as a broad, interdisciplinary field addressing the automation of business practices via open, globally spanning, Internet public access. E-commerce shows great promise in improving the efficiency of current

Capillary Electrophoresis as a Tool for Optimization of Multiplex PCR Reactions

February 1, 2001
Author(s)
John M. Butler, C M. Ruitberg, Peter M. Vallone
Copying multiple regions of a DNA molecule is routinely performed today using the polymerase chain reaction (PCR) in a process commonly referred to as multiplex PCR. The development of a multiplex PCR reaction involves designing primer sets and examining

Ceramic Thin Film Measurements and Standards Program Web Page

February 1, 2001
Author(s)
Charles E. Bouldin, Debra Kaiser, Peter K. Schenck
Ceramic materials are increasingly being used in thin film form in electronic, optical, optoelectronic, and magnetic devices. Our program addresses measurements, standards and data needs for a wide variety of application areas, including III-V andIII

Characterization of Coating System Interphases with Phase Imaging AFM

February 1, 2001
Author(s)
Tinh Nguyen, Xiaohong Gu, Mark R. VanLandingham, M Giraud, R Dutruc-Rosset, R Ryntz, D Nguyen
The interphase between a polymer film and a substrate controls the adhesion and durability of a variety of polymeric systems including adhesives, coatings on plastics and metals, and electronic packaging. A polymeric coating system consists of a coating

Characterization of Coating System Interphases With Phase Imaging AFM.

February 1, 2001
Author(s)
Tinh Nguyen, Xiaohong Gu, M Giraud, M R. VanLandingham, R Dutruc-Rosset, R Ryntz, D Nguyen
The interphase between a polymer film and a substrate controls the adhesion and durability of a variety of polymeric systems including adhesives and coatings on plastics and metals. Interphase formation is affected by processing conditions that control

Comparison of High- and Low-Voltage X-Ray Mapping of an Electronic Device

February 1, 2001
Author(s)
John A. Small, David S. Bright
In recent years, field-emission gun scanning electron microscopes, FEG-SEMs, with high-brightness electron guns and excellent performance at low electron beam energies (E 0 less then or equal to 5 keV) have become readily available. Concurrently the

Conical Emission by 2-PS Excitation of Potassium Vapor

February 1, 2001
Author(s)
D Sarkisyan, B D. Paul, S T. Cundiff, E A. Gibson, Alan Gallagher
Conical emission, redshifted from the atomic resonance, is observed when a ~2ps laser beam, blueshifted from resonance, propagates through potassium vapor. In contrast, no cone is visible when a 150-fs pulse is used. The 2-ps pulse-induced cone has a

Constructing Sibson Elements for a Rectangular Mesh

February 1, 2001
Author(s)
David E. Gilsinn
This paper documents the construction of a finite element, called the Sibson element. The shape function of this element is formed on rectangular grids by C 1 splines defined on a triangulation of each subrectangle by dividing it into four subtriangles
Displaying 46076 - 46100 of 73994
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