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Displaying 47301 - 47325 of 73830

Thermodynamics of Reactions Catalyzed by Branched-Chain-Amino-Acid Transaminase

October 1, 2000
Author(s)
Yadu D. Tewari, Robert N. Goldberg, J D. Rozzell
Apparent equilibrium constants and calorimetric enthalpies of reaction have been measured for reactions catalyzed by branched-chain-amino-acid transaminase. The following biochemical reactions have been studied at the temperature 298.15 K and in the pH

Uncertainties in Dynamic Sphere Radar Cross Section Data

October 1, 2000
Author(s)
Lorant A. Muth, W. Sefcik
This is a report on work in progress to understand the wide variations in sphere calibration data observed on dynamic radar cross section measurement ranges. The magnitude of these fluctuations indicate an uncertainty of greater than 2 dB in some cases

What's the Buzz? Use BEES to Design Greener, Lower-Cost Buildings

October 1, 2000
Author(s)
Barbara C. Lippiatt
The BEES (Building for Environmental and Economic Sustainability) version 2.0 software implements a rational, systematic technique for selecting environmentally and economically balanced building products. The technique is based on consensus standards and

Workshop on Smart Spaces

October 1, 2000
Author(s)
Kevin L. Mills, Jean C. Scholtz, K Sollins
In July of 1999, three agencies in the US government (the Defense Advanced Research Projects Agency, the National Science Foundation, and the National Institute of Standards and Technology) sponsored a workshop on Smart Spaces. The intention of this

CIE Fundamentals for Color Measurements

September 30, 2000
Author(s)
Yoshi Ohno
The paper first overviews the CIE system of colorimetry, covering CIE 1931 color matching functions, XYZ tristimulus values, the x, y diagram, the 1976 u', v' diagram, and the evolvement of CIELUV and CIELAB color spaces and color difference formulae. The

Diffuse Reflectance Spectroscopy for In Situ Process Monitoring and Control During Molecular Beam Epitaxy Growth of InGaAs Pseudomorphic High Electron Mobility Transistors

September 29, 2000
Author(s)
Jonathan E. Guyer, W. F. Tseng, Joseph G. Pellegrino
We report the use of diffuse reflectance spectroscopy for active, closed-loop control of substrate temperature during the growth of a modulation doped heterostructure. Measurement and control of substrate temperature is a common difficulty for molecular

On-Wafer Measurement of Transmission Lines On Lossy Silicon Substrates

September 25, 2000
Author(s)
Uwe Arz, Dylan Williams, Hartmut Grabinski
This paper examines broadband measurement techniques for electrical properties of planar transmission lines built on lossy silicon substrates. We start by investigating the performance of a new formulation of the calibration com-parison method which is

Automated Tracking of Structural Steel Members at the Construction Site

September 18, 2000
Author(s)
K M. Furlani, L E. Pfeffer
This paper presents further development and experimental testing of Comp-TRAK, a prototype system for identification and spatial tracking of structural steel components on a live construction site. Comp-TRAK is a web-based system for rapid tracking of

Attractors, Chain Transitive Sets and Invariant Measures

September 15, 2000
Author(s)
Fern Y. Hunt
This paper discusses an easy to implement procedure for approximating the long time behavior of iterates of maps. Applications include to finding the roots of a complex polynomial and approximating attractors. The method uses the theory of Markov chains.

Mutation Operators for Specifications

September 15, 2000
Author(s)
Paul E. Black, Vadim Okun, Yaacov Yesha
Testing has a vital support role in the software engineering process, but developing tests often takes significant resources. A formal specification is a repository of knowledge about a system, and a recent method uses such specifications to automatically

1999 Survey of Forensic Standard Reference Materials

September 13, 2000
Author(s)
Alim A. Fatah
A survey was conducted to assess the reference materials and collections that were available in forensic laboratories to determine which were not available and in greatest demand. This report presents the results of that survey. The survey included

Techniques to Measure Magnetic Domain Structures

September 11, 2000
Author(s)
Robert Celotta, John Unguris, Michael H. Kelley, Daniel T. Pierce
A summary of the current techniques for magnetic domain imaging of materials, including the practical aspects of each technique, the requirements on the sample, the specimen modification allowed and the problems normally encountered. References to more

The Biometric Consortium 2000 Conference Proceedings

September 11, 2000
Author(s)
Fernando L. Podio, J S. Dunn
The Biometric Consortium 2000 Conference examined rapid advances in biometric technologies and applications and explored new developments in the areas of metrology, assurance, and standards. Biometrics integration with information technology products was
Displaying 47301 - 47325 of 73830
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