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Displaying 45776 - 45800 of 73697

Stability of Diamond Turning Processes That Use Round Nosed Tools?

February 12, 2001
Author(s)
David E. Gilsinn, B Balachandran, Matthew A. Davies
In this article, a multi-mode model is developed for a diamond-turning process which takes into account the cutting forces that result from the geometry of the chip area cut by a round nosed tool. These cutting forces are assumed proportional to the uncut

Superconducting Nb DHEB Mixer Arrays for Far-Infrared Spectroscopy

February 12, 2001
Author(s)
Eyal Gerecht, Carl D. Reintsema, Erich N. Grossman, A. L. Betz, R. T. Boreiko
We are developing a heterodyne focal plane array with up to eight elements to study lines with frequencies of 2 THz and above. It is intended for studies of the interstellar medium and planetary atmospheres. Our fabricatin process utilizes selective ion

Test Chip for Electrical Linewidth of Copper-Interconnection Features and Related Parameters

February 6, 2001
Author(s)
Michael W. Cresswell, N. Arora, Richard A. Allen, Christine E. Murabito, Curt A. Richter, Ashwani K. Gupta, Loren W. Linholm, D. Pachura, P. Bendix
This paper reports a new electrical test structure for measuring the barrier-layer thickness and total physical linewidth of copper-cored interconnect features. The test structure has four critical dimension (CD) reference segments of different drawn

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
Displaying 45776 - 45800 of 73697
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