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Displaying 48976 - 49000 of 74069

Broadband Electromagnetic Field Sensors with Electro-Optical Links

November 1, 1999
Author(s)
Keith D. Masterson, Motohisa Kanda, David R. Novotny
In this paper, we review the system design, antenna structures, and optoelectronic components that can be used to accurately measure electromagnetic (EM) fields at frequencies up to 100 GHz, in support of the technologies of telecommunications, materials

Challenges in Capturing Oxygenase Activity In Vitro

November 1, 1999
Author(s)
V L. Vilker, Vytautas Reipa, M P. Mayhew, Marcia J. Holden
Biocatalysis using oxygenase or desaturase enzymes has the potential to add value to native fats and oils by adding oxygen hydroxyl groups, or double bonds to create regio- and/or stereospecific products. These enzymes are a subset of the large class of

Charge Lamp BAsed on MgH RAdiation

November 1, 1999
Author(s)
S Ukegawa, Alan Gallagher
We report the efficacy and spectrum of an inductively-coupled, radio-frequency discharge in mixtures of magnesium (Mg), hydrogen (H 2), and argon vapor. The predominantly green emission is dominated by the A-X band of MgH, plus some Mg lines. The discharge

Deployment Test of the NIST EOS Thermal-Infrared Transfer Radiometer

November 1, 1999
Author(s)
Joseph P. Rice, S C. Bender, W H. Atkins, Francis J. Lovas
The National Institute of Standards and Technology (NIST) Thermal-infrared Transfer Radiometer (TXR), developed for the National Aeronautics and Space Administration (NASA) Earth Observing System (EOS), was deployed at the remote sensing radiometric

Direct Blind Deconvolution

November 1, 1999
Author(s)
Alfred S. Carasso
Blind deconvolution seeks to deblur an image without knowing the cause of the blur. Iterative methods are commonly applied to that problem, but the iterative process is slow, uncertain, and often ill-behaved. This paper considers a significant but limited

Dynamic Power-Conscious Routing for MANETs: An Initial Approach

November 1, 1999
Author(s)
M W. Subbarao
We develop an initial dynamic power-conscious routing scheme (MPR) that incorporates physical layer and link layer statistics to conserve power, while compensating for the channel conditions and interference environments at the intended receiver. The aim

Embedded Systems and the Year 2000 Problem

November 1, 1999
Author(s)
G E. Fisher, M Cherry
Much has been written about embedded systems and how they will be affected by the year 2000 problem. During the first 6 months of 1999, a significant amount of conflicting information was spread about the outlook for fixing systems that rely on embedded

Experiments in Dilute Atomic Bose-Einstein Condensation

November 1, 1999
Author(s)
Eric A. Cornell, J R. Ensher, C E. Wieman
Why BEC? - In the month we began writing this paper, fourteen papers on the explicit topic of Bose-Einstein condensation (BEC) in a dilute gas appeared in the pages of Physical Review. Both theoretical and experimental activity in BEC has expanded

Extracting Thermochemical Information From Ab Initio Data

November 1, 1999
Author(s)
Karl K. Irikura
These are two lectures delivered at the NATO ASI on Energetics of Stable Molecules and Reactive Intermediates, Castelo Branco, Portugal, July 1998. They have been lightly edited and converted to HTML for electronic publication. Text for review is at the

Filler-Induced Composition Waves in Phase-Separating Polymer Blends

November 1, 1999
Author(s)
B P. Lee, Jack F. Douglas, S C. Glotzer
The influence of a dilute concentration of filler particles on polymer blend phase separation is investigated computationally using a generalization of the Cahn-Hilliard-Cook (CHC) theory to include model filler particles (spheres, fibers, platelets)

Grating Pitch Measurements With the Molecular Measuring Machine

November 1, 1999
Author(s)
John A. Kramar, Jay S. Jun, William B. Penzes, Fredric Scire, E C. Teague, John S. Villarrubia
At the National Institute of Standards and Technology, we are building a metrology instrument called the Molecular Measuring Machine (M^3) with the goal of performing nanometer- accuracy two-dimensional feature placement measurements over a 50 mm by 50 mm
Displaying 48976 - 49000 of 74069