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Displaying 40851 - 40875 of 73697

The Common Industry Format: A Way for Vendors and Customers to Talk About Software Usability

June 1, 2003
Author(s)
Jean C. Scholtz, Emile L. Morse, Sharon J. Laskowski, A Wichansky, K Butler, K Sullivan
One way to encourage software developers to integrate usability engineering into their development process is for purchasers to require evidence of product usability. Until recently this presented a difficulty because usability and ¿user friendly software¿

Thermal and Flammability Properties of a Silica-PMMA Nanocomposite

June 1, 2003
Author(s)
Takashi Kashiwagi, A B. Morgan, Joseph M. Antonucci, Mark R. VanLandingham, Richard H. Harris Jr., W H. Awad, John R. Shields
PMMA, poly(metheylmethacrylate), nanocomposites were made by in situ radical polymerization of MMA, methylmethacrylate, with colloidal silica (ca. 12 nm) to study the effects of nanoscale silica particles on the physical properties and flammability

Tolerance Synthesis Scheme

June 1, 2003
Author(s)
Utpal Roy, N Pramanik, Sudarsan Rachuri, Ram D. Sriram, Kevin W. Lyons
The objective of this report is to identify representations and issues for the generic assembly information model and its use in a proactive tolerance synthesis scheme. It is proposed to use the small displacement torsors (the screw parameters) as a

Towards Modeling the Evolution of Product Families

June 1, 2003
Author(s)
Fujun Wang, Steven J. Fenves, Sudarsan Rachuri, Ram D. Sriram
A strategy successfully used by manufacturing companies is to develop product families so as to offer a variety of products with reduced development costs. This paper introduces our initial research on the representation of the evolution of product

Transverse Compressive Stress Effect in Y-Ba-Cu-O Coatings on Biaxially Textured Ni and Ni-5at.%W Substrates

June 1, 2003
Author(s)
Najib Cheggour, John (Jack) W. Ekin, Cameron C. Clickner, D. T. Verebelyi, C. L. H. Thieme, Ron Feenstra, P Goyal, D F. Paranthaman
Electromechanical properties of yttrium-barium-copper-oxide (YBCO) coatings on both pure Ni and Ni-5at.%W alloy rolling-assisted, biaxially-textured substrates (RABiTS) were investigated. The effect of transverse compressive stress on transport critical

Tungsten Transition-Edge Sensors for IR/Optical/UV Photon Counting

June 1, 2003
Author(s)
Aaron J. Miller, Sae Woo Nam, John M. Martinis, Alexander V. Sergienko
Tungsten transition-edge sensors have been demonstrated to have impressive photon-counting capabilities. Of particular interest is the expected impact to the applications of low-flux astronomy and photonic quantum information. The combination of high

Tunnel-Coupled Quantum Dots: Atomistic Theory of Quantum Dot Molecules and Arrays

June 1, 2003
Author(s)
Garnett W. Bryant, Javier Aizpurua, W Jaskolski, M Zielinski
An understanding of how dots couple in quantum dot molecules and arrays is needed so that the possibilities for tailored nanooptics in these systems can be explored. The properties of tunnel-coupled dots will be determined by how the dots couple through

Uncertainty Analysis of Reflectance Colorimetry

June 1, 2003
Author(s)
E A. Early, Maria E. Nadal
The specification of the color of an object is important, sometimes crucially, to its acceptability for an intended application. When quantitative measurements are used to determine the color of an object, an uncertainty is required to satisfy the

Uncertainty Calculation for the Ratio of Dependent Measurements

June 1, 2003
Author(s)
C M. Wang, H K. Lyer, J Hannig
In this paper we consider the problem of computing an uncertainty interval a ratio with a prescribed confidence level. Although an exact confidence interval procedure, known as the Fieller interval, is available for this problem, practitioners often use

Virtual Environment for Manipulating Microscopic Particles with Optical Tweezer

June 1, 2003
Author(s)
Yong-Gu Lee, Kevin W. Lyons, Thomas W. LeBrun
In this paper, we use virtual reality techniques to define an intuitive interface to a nanoscale manipulation device. This device utilizes optical methods to focus laser light to trap and reposition nano-to-microscopic particles. The underlying physics are

VNA Calibration Software Manual

June 1, 2003
Author(s)
Dylan Williams, Jack Wang, Uwe Arz
This software algorithm combines a decade of experience in applying orthogonal distance regression and other iterative techniques to solving vector-network-analyzer (VNA) calibrations. The new software features a robust algorithm capable of finding

Monitoring Polymer/Clay Nanocomposites Compounding Using a Dielectric Slit Die

May 30, 2003
Author(s)
Anthony J. Bur, S C. Roth, M M. McBrearty
A new in-line process monitoring instrument, a dielectric slit die, was used to examine compounding of polymer/clay nanocomposites. It is a multi-purpose sensing device for measuring polymer dielectric, rheological and optical properties during extrusion

Specific Antibody-DNA Interaction: A Novel Strategy for Tight DNA Recognition

May 27, 2003
Author(s)
S M. Di Pietro, J M. Centeno, M L. Cerutti, M F. Lodeiro, D U. Ferreiro, L G. Alonso, Frederick P. Schwarz, F Goldbaum, G de Prat-Gay
Taking advantage of the extreme stability of a protein-DNA complex, we obtained highly specific monoclonal antibodies against a predetermined palindromic double stranded DNA sequence, corresponding to the binding site of the E2 transcriptional regulator of

ThermoML - An XML-Based Approach for Storage and Exchange of Experimental and Critically Evaluated Thermophysical and Thermochemical Property Data 2. Uncertainties

May 26, 2003
Author(s)
Robert D. Chirico, Michael D. Frenkel, Vladimir Diky, K N. Marsh, R C. Wilhoit
ThermoML is an XML-based approach for storage and exhange of experimental and critically evaluated thermophysical and thermochemical property data. Extensions to the ThermoML schema for the expression of uncertainties are described. Basic principles, scope

Gold-Black Coatings for Freestanding Pyroelectric Detectors

May 23, 2003
Author(s)
John H. Lehman, Evangelos Theocharous, George P. Eppeldauer, Chris Pannell
We describe the process of depositing gold-black on thin, freestanding pyroelectric detector substrates and compare this with previous work documented in the literature. We have evaluated gold-black coatings on thin, freestanding pyroelectric detector

Electricity Division Programs, Activities, and Accomplishments

May 21, 2003
Author(s)
James K. Olthoff, Barry A. Bell
This book describes the research programs, activities, and recent accomplishments of the Electricity Division organized by research project. After the project descriptions is a list of the calibration services that the Division provides, NRC Postdoctoral
Displaying 40851 - 40875 of 73697
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