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Displaying 32401 - 32425 of 73929

Environmental Regulations Impose New Product Lifecycle Information Requirements

July 1, 2007
Author(s)
John V. Messina, Eric D. Simmon, Matthew L. Aronoff
In a global response to increasing health and environmental concerns, there has been a trend towards governments enacting legislation to encourage sustainable manufacturing where industry creates products that minimize environmental impact. This

Extracting Electron Densities in N-Type GaAs from Raman Spectra: Theory

July 1, 2007
Author(s)
Herbert S. Bennett
Raman measurements are proposed as a non-destructive method for wafer acceptance tests of carrier density. The interpretation of Raman spectra to determine the majority electron density in n-type semiconductors requires an interdisciplinary effort

Field-free ringing of nanomagnets

July 1, 2007
Author(s)
Thomas J. Silva
Ever since William Gilbert's 16th century treatise "De Magnete," it has been known that magnetic fields can be used to manipulate the magnetic orientation of ferromagnets. This has been the foundation for electronic applications of magnetic materials for

Generic Simulation of Automotive Assembly for Interoperability Testing

July 1, 2007
Author(s)
Deogratias Kibira, Charles R. McLean
Computer simulation is effective in improving the effi-ciency of manufacturing system design, operation, and maintenance. Most simulation models are usually tailored to address a narrow set of industrial issues, e.g., the intro-duction of a new product. If

Implementing a Multiplexed System of Detectors for Higher Photon Counting Rates

July 1, 2007
Author(s)
V Schettini, Sergey Polyakov, Ivo P. Degiovanni, Giorgio Brida, Stefania Castelletto, Alan L. Migdall
Photon counting applications are often limited by detector deadtime to operate at count rates of a few MHz, at best, and often at significantly lower levels. This limitation is becoming more critical as with the advance of photon counting applications such

Interpolation Procedures for Database-Assisted Design

July 1, 2007
Author(s)
Joseph A. Main
Database-assisted design (DAD) is a methodology of designing structures for wind loads that makes direct use of pressure time series from wind tunnel tests. This paper presents interpolation procedures that enable application of the DAD approach for cases

Modeling of Photochemical Reactions in a Focused Laser Beam

July 1, 2007
Author(s)
Fern Y. Hunt, Adolfas Gaigalas, Lili Wang
This paper presents a mathematical model of photodegradation of fluorophores passing through a laser beam. The beam is focused on the sample and thus the power distribution of incident light is strongly dependent on spatial location while the fluorophores

NIST Measurement Services: cw Laser Power and Energy Calibrations at NIST

July 1, 2007
Author(s)
Joshua A. Hadler, Christopher L. Cromer, John H. Lehman
This document describes a calibration service for absolute laser power and energy measurements of laser power meters and detectors used with continuous wave lasers at laser wavelengths between 325 and 1550 nm. In addition to a summary of the calibration

Operational analysis of a quantum dot, optically gated, field-effect transistor as a single-photon detector

July 1, 2007
Author(s)
Eric Gansen, Mary A. Rowe, Marion Greene, Danna Rosenberg, Todd E. Harvey, Mark Su, Robert Hadfield, Sae Woo Nam, Richard Mirin
We report on the operation of a novel single-photon detector, where a layer of self-assembled quantum dots (QDs) is used as an optically addressable floating gate in a GaAs/Al0.2Ga0.8As Δ}-doped field-effect transistor. Photogenerated holes charge the QDs

RAPID INSPECTION OF CARBON NANOTUBE QUALITY

July 1, 2007
Author(s)
Stephanie A. Hooker, Roy H. Geiss, Aparna Kar
Carbon nanotubes have unique properties of interest for applications in aerospace, electronics, and biotechnology. However, the properties of different batches of carbon nanotubes can vary considerably depending on chemical purity and the nanotube types

RFID Devices and Systems in Homeland Security Applications

July 1, 2007
Author(s)
Kate Remley, Jeffrey R. Guerrieri, Dylan Williams, David R. Novotny, Anthony B. Kos, Nelson Bryner, Nader Moayeri, Michael Souryal, Kang Lee, Steven Fick
This article reports on activities being carried out by the National Institute of Standards and Technology to ensure secure, reliable use of Radio-Frequency Identification (RFID) technology in homeland security and public safety applications. These

Standards-Based Semantic Middleware

July 1, 2007
Author(s)
Nenad Ivezic, Boonserm Kulvatunyou, Marko Vujasinovic, Pat Snack, Zuran Marjanovic, Hyunbo Cho
We describe a novel semantics-based architecture for standards-based approaches to interoperable applications. The paper includes our experiences in prototyping the proposed architecture and demonstrating the resulting semantic middleware capability. This

The Role of Water in the Thermodynamics of Drug Binding to Cyclodextrin

July 1, 2007
Author(s)
Niya Tordorova, Frederick P. Schwarz
The thermodynamic parameters, DBGo, DBHo, and DBSo, of the drugs flurbiprofen (FLP), nabumetone (NAB), and naproxen (NPX) binding to b-cyclodextrin (bCD) and to g-cyclodextrin (gCD) in 0.10 M sodium phosphate buffer were determined from isothermal

Towards Standards for Integrated Gaming and Simulation for Incident Management

July 1, 2007
Author(s)
Sanjay Jain, Charles R. McLean, Yung-Tsun T. Lee
Simulation and gaming can support decision making through all phases of incident management including prevention, preparedness, response, recovery and mitigation. A number of gaming and simulation tools have been developed for the purpose but they
Displaying 32401 - 32425 of 73929
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