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Displaying 43201 - 43225 of 74425

Ultracold Ground-State Molecule Production in Sodium

November 1, 2002
Author(s)
F K. Fatemi, Kevin Jones, Paul D. Lett, Eite Tiesinga
We have observed the formation of ground state Na 2 molecules via the spontaneous decay of excited molecules created by the photoassociation of ultracold atoms. We measure the energies of ground state molecules formed in three hyperfine components of the

Knowledge Engineering for Real Time Control

October 30, 2002
Author(s)
John Evans, Elena R. Messina, James S. Albus, Craig I. Schlenoff
The key to real-time intelligent control lies in the knowledge models that the system contains. Three main classes of knowledge are identified: parametric, geometric/iconic, and symbolic. Each of these classes provides unique perspectives and advantages

Towards a Formal Representation of Driving Behaviors

October 28, 2002
Author(s)
Craig I. Schlenoff, Michael Gruninger
To successfully perform their required tasks, intelligent information agents require accurate and meaningful communication and integration among other agents and information resources. However, the applications and infrastructure of information technology

Thermal Component Models for Electro-Thermal Analysis of Multichip Power Modules

October 24, 2002
Author(s)
J J. Rodriguez, John V. Reichl, Zharadeen R. Parrilla, Allen R. Hefner Jr., David W. Berning, M Velez-Reyes, Jih-Sheng Lai
Thermal component models are developed for multi-chip IGBT power electronic modules (PEM) and associated high-power converter heatsinks. The models are implemented in SABER and are combined with the electro-thermal IGBT and diode models to simulate the

Testing with Model Checkers: Insuring Fault Visibility

October 23, 2002
Author(s)
Vadim Okun, Paul E. Black, Y Yesha
To detect a fault in software, a test case execution must be chosen so intermediate errors propagate to the output. We describe two modeling methods for specification-based mutation testing using model checkers that guarantee this propagation. We evaluate

Development of High Throughput Methods for Polymer Nanocomposite Research

October 22, 2002
Author(s)
Jeffrey W. Gilman, Rick D. Davis, Marc R. Nyden, Takashi Kashiwagi, John R. Shields, W -. Demory
This chapter will present an overview of the development of two high throughput (HT) methods: 1) preparation of formulated polymer libraries using extrusion, 2) screening of flammability properties using flame spread measurements.

Defect Generation in Ultra-thin Oxide Over Large Fluence Range

October 21, 2002
Author(s)
Da-Wei Heh, Eric M. Vogel, J B. Bernstein
The defect generation rate (P g) during constant voltage stress is investigated by using short-time voltage pulses over large fluence range. It is found that P g is not constant as a function of injected charge and the voltage acceleration of P g in the

Round Robin Assessment of the Single Fiber Fragmentation Test

October 21, 2002
Author(s)
M J. Rich, L T. Drzal, Donald L. Hunston, Gale A. Holmes, Walter G. McDonough
The Versailles Project on Advanced Materials and Standards (VAMAS) was established following an economic summit meeting in 1982 held at Versailles by the Heads of State of the seven leading industrial nations and representatives from the Commission of the

Stiffness and Failure Behavior of Model Hybrid Composites

October 21, 2002
Author(s)
Donald L. Hunston, Walter G. McDonough
Many applications are exploring the use of hybrid composites; i.e., polymers reinforced with two different types of fibers, because such systems can have a superior balance of properties and/or a better balance of properties and cost. Unfortunately, the

Embedded Real-Time Linux for Cable Robot Control

October 2, 2002
Author(s)
Frederick M. Proctor, William P. Shackleford
Linux is a version of the Unix operating system distributed according to the open source model. Programmers are free to adapt the source code for their purposes, but are required to make their modifications or enhancements available as open source software

A Core Product Model for Representing Design Information

October 1, 2002
Author(s)
Steven J. Fenves
The report presents a core model for representing design information, motivated by the perceived needs of next-generation product development systems and drawing content-level requirements from a related study of design information flows. The core model

A Glyph Toolbox for Immersive Scientific Visualization

October 1, 2002
Author(s)
H W. Bullen, J S. Chang, A V. Harn, Steven G. Satterfield, Peter M. Ketcham, J E. Devaney
We describe a set of software, the Glyph ToolBox (GTB), for creating three dimensional (3D) glyphs. This software defines a single, general format for describing glyphs; it includes color and opacity parameters as well as location information.GTB is
Displaying 43201 - 43225 of 74425
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