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Displaying 42951 - 42975 of 74049

Bimodal Size Distribution of Self-Assembled InGaAs Quantum Dots

September 23, 2002
Author(s)
Solveig Anders, C. S. Kim, Benjamin D. Klein, Mark W. Keller, Richard Mirin
We investigate energy level quantization in self-assembled InGaAs quantum dots that are embedded In a GaAs matrix. We use capacitance and photoluminescence spectroscopy to analyze the evolution of the energy levels with varying amounts of deposited InGaAs

Knowledge Engineering for Real Time Intelligent Control

September 18, 2002
Author(s)
John Evans, Elena R. Messina, James S. Albus
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

Viscoelastic Characterization of Sealant Materials

September 18, 2002
Author(s)
Donald L. Hunston, Christopher C. White
Polymeric sealants are an important example of a major consumer product where the performance depends critically on rheological properties. The work here developed a testing and modeling procedure to characterize the basic mechanical properties of sealant

The 2001 Material Research Society (MRS) Fall Meeting Report

September 17, 2002
Author(s)
Winnie K. Wong-Ng
The 2001 Materials Research Society (MRS) annual meeting took place in Boston Copely Plaza (in the spacious Hynes Convention Center) from November 25-30. The four meeting co-chairs: B.M. Clemens, J.A. Floro, J.A. Kornfield, and Y. Suzuki have organized a

Effects of Word Error Rate in the DARPA Communicator Data During 2000 and 2001

September 16, 2002
Author(s)
Gregory A. Sanders, A N. Le, John S. Garofolo
During 2000 and 2001 two large data collections were performed, with paid users doing travel planning using eight Communicator spoken dialogue systems. We analyze the effects of speech recognition accuracy, as measured by Word Error Rate (WER), on other

The TREC 2001 Video Track: Information Retrieval on Digital Video Information

September 16, 2002
Author(s)
Alan Smeaton, Paul D. Over, C Costello, Arjen P. Vries, D Doermann, A Hauptmann, M Rorvig, J R. Smith, W Lide
The development of techniques to support content-based access to archives of digital video information has recently started to receive much attention from the research community. During 2001, the annual TREC activity, which has been benchmarking the

Rotational Hysteresis of Exchange-Spring Magnets

September 13, 2002
Author(s)
J.S. Jiang, S D. Bader, H Kaper, G Leaf, Robert D. Shull, Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, C L. Platt, A. E. Berkowitz, S David, E E. Fullerton
We highlight our experimental studies and micromagnetic simulations of the rotational hysteresis in exchange-spring magnets. Magneto-optical imaging and torque magnetometry measurements for SmCo/Fe exchange-spring films with uniaxial in-plane anisotropy

Application of an On-Line Weld Monitoring System

September 12, 2002
Author(s)
Thomas A. Siewert, Ivan Samardzic, Stefanija Klaric
quisition analysis and real-time manipulation of the welding parameters offer added controls over the weld quality. Thanks to the continual development of information technology and electronics, it is possible to improve the systems for monitoring of the
Displaying 42951 - 42975 of 74049
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