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Displaying 43451 - 43475 of 75021

Light Scattering by Slightly Nonspherical Particles on Surfaces

July 1, 2002
Author(s)
Thomas A. Germer
We investigate the shape dependence of the scattering by dielectric and metallic particles on surfaces by considering particles whose free-space scattering properties are nearly identical. The scattering by metallic particles is very strongly dependent

Meteorological Extremes

July 1, 2002
Author(s)
Emil Simiu
This entry discusses briefly basic principles of extreme value (EV) estimation (see Extreme value analysis), the role of simulations for the development of relevant meteorological data sets, the interaction between the practical application of the

Modeling Moisture in Residential Buildings with a Multizone IAQ Program

July 1, 2002
Author(s)
Steven J. Emmerich, Andrew K. Persily, Steven J. Nabinger
Multizone airflow and contaminant transport modeling is a valuable tool for researchers and others studying indoor air quality (IAQ) problems in buildings. Although water vapor is not typically thought of as an indoor contaminant, multizone IAQ modeling

NDE of Concrete Structures Strengthened with FRP Using Infrared Thermography

July 1, 2002
Author(s)
M A. Starnes, Nicholas J. Carino, E A. Kausel
Numerical and experimental methods are used to investigate the effectiveness of infrared thermography to estimate the width of subsurface flaws in fiber-reinforce polymer (FRP) laminates bonded to concrete. The study focuses on establishing the potential

NIST Measurement Services That Support Optoelectronics

July 1, 2002
Author(s)
Sally S. Bruce, Christopher L. Cromer
The National Institute of Standards and Technology (NIST) offers a variety of hundreds of measurement services to its customers as a part of it's core mission. These services include reference data, reference materials, and physical measurements and

Nonreflecting Boundary Conditions for the Time-Dependent Wave Equation

July 1, 2002
Author(s)
Bradley K. Alpert, L Greengard, T Hagstrom
We describe a new, efficient approach to the imposition of exact nonreflecting boundary conditions for the scalar wave equation. We compare the performance of our approach with that of existing methods by coupling the boundary conditions to finite

Observation of Time-Dependent Inhibited Spontaneous Emission

July 1, 2002
Author(s)
D A. Branning, Alan L. Migdall
We present the results of an experiment to observe inhibited spontaneous emission of a parametric downconverter by an optical cavity whose switching time is short compared with the round trip time of the light.

Planning with Incrementally Created Graphs

July 1, 2002
Author(s)
Stephen B. Balakirsky, Otto H. Herzog
A framework for planning algorithms that is both optimal and complete will be presented that allows for the planning of optimal paths through a multi-level hierarchy of annotated graph spaces. A rich world model that contains multi-resolution attributes

Quantifying Usability: The Industry Usability Reporting Project

July 1, 2002
Author(s)
Jean C. Scholtz, Emile L. Morse, Sharon J. Laskowski, A Wishansky, K Butler
The paper describes the Common Industry format (CIF) developed in the Industry Usability Reporting Project (IUSR), which is now an ANSI standard. Four pilot studies conducted to verify the usefulness of the CIF are also described.

Quantitating Fluorescence Intensity From Fluorophores: Practical Use of MESF Values

July 1, 2002
Author(s)
Lili Wang, Adolfas K. Gaigalas, F Abassi, G E. Marti, R F. Vogt, A Schwarz
The present work uses fluorescein as the model fluorophore and points out critical steps in the use of MESF (Molecules of Equivalent Soluble Fluorophores) values for quantitative flow cytomeric measurements. It has been found that the emission spectrum

Quantitation of Polymer End Groups Using MALDI TOF MS

July 1, 2002
Author(s)
A P. Weaver, Charles M. Guttman, Kathleen M. Flynn
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI TOF MS) has been employed to analyze polystryrene mixtures of molecular mass ca. 4000u. The component polymers of thes mixtures are identical except for their end groups
Displaying 43451 - 43475 of 75021