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Displaying 37901 - 37925 of 74079

Electronic and Phase Stability Properties of V-X (X = Pd, Rh, Ru) Alloys

August 1, 2004
Author(s)
P E. Turchi, Richard M. Waterstrat, R Kuentzler, V Drchal, J Kudrnovsky
In this work, we focus on the ordered structures of V-X systems, where X = Ru, Rh, Pd, and relate the variation in the difference of the numbers of valence electrons of the alloy constituents to the information contained in the constitution phase diagrams

Electronic Authentication: Guidance for Selecting Secure Techniques

August 1, 2004
Author(s)
Shirley M. Radack
This ITL Bulletin summarizes the contents of NIST Special Publication 800-63, Electronic Authentication Guideline, by William E. Burr, Donna F. Dodson, and W. Timothy Polk, which provides technical guidance on existing and widely implemented methods for

Energy Transfer Effects During the Multichannel Decomposition of Ethanol

August 1, 2004
Author(s)
Wing Tsang
Rate constants and expressions for the initial processes in the decomposition of ethanol have been derived on the basis of existing experimental and estimated results. Energy transfer effects on the multichannel decomposition processes have been determined

Evaluation of Thermal Imaging Cameras Used in Fire Fighting Applications

August 1, 2004
Author(s)
Francine K. Amon, Anthony P. Hamins
Thermal imaging cameras are rapidly becoming integral equipment for first responders for use in burning structures. Currently there are no standardized test methods or performance metrics available to the users or manufacturers of these instruments. The

Implementing the High Level Architecture in the Virtual Test Bed

August 1, 2004
Author(s)
J Sepulveda, Luis C. Rabelo, J Park, Frank H. Riddick
The Virtual Test Bed (VTB) is a prototype of a virtual engineering environment to study operations of current and future space vehicles, spaceports, and ranges. The High-Level Architecture (HLA) as defined by the Department of Defense (DoD), is the main

In-Situ Soft X-Ray Studies of CO Oxidation on the Pt(111) Surface

August 1, 2004
Author(s)
D J. Burnett, A T. Capitano, A M. Gabelnick, A L. Marsh, Daniel A. Fischer, J L. Gland
Temperature programmed and isothermal fluorescence yield measurements have been used to characterize carbon monoxide oxidation on the Pt(111) surface for oxygen pressures from 0.027 Pa to 2.7 Pa over the 200 to 600 K temperature range. Carbon monoxide

Information Security (IS) in the System Development Life Cycle (SDLC)

August 1, 2004
Author(s)
Ae-kyoung Lee, Tanya L. Brewer
Many system development life cycle (SDLC) models exist that can be used by an organization to effectively develop an information system. Security should be incorporated into all phases, from initiation to disposition, of an SDLC model. This Bulletin lays

Inputs and Outputs in PSL

August 1, 2004
Author(s)
Conrad Bock, Michael Gruninger
Inputs and outputs are ubiquitous in flow modeling, including popular programming languages. This paper examines how inputs and outputs can be formalized in the Process Specification Language (PSL) to reduce ambiguity and increase expressiveness compared

Making Cold Molecules by Time-Dependent Feshbach Resonances

August 1, 2004
Author(s)
Paul S. Julienne, Eite Tiesinga, T Kohler
Pairs of trapped atoms can be associated to make a diatomic molecule using a time dependentMagnetic field to ramp the energy of a scattering resonance state from above to below the scatteringthreshold. A relatively simple model, parameterized in terms of

Manufacturing Information Integration in Product Lifecycle Management (PLM)

August 1, 2004
Author(s)
Guixiu Qiao, Charles R. McLean
The research on manufacturing information integration in PLM calls for a new fundamental information technology to enable adaptive information representation and exchange between manufacturing applications. Four major problems are studied, including

Metric Mapping Concepts for TIA

August 1, 2004
Author(s)
Michelle P. Steves, Jean C. Scholtz
In this paper, we present a metrics framework and the underlying concepts that were used to help structure a series of evaluations of software tools to support intelligence workers with their data filtering and analytic processes. The deployment of the

Microfabricated Atomic Frequency References

August 1, 2004
Author(s)
Svenja A. Knappe, P Schwindt, V Shah, Leo W. Hollberg, John E. Kitching, Li-Anne Liew, John M. Moreland
We describe a design for a microfabricated atomic frequency reference with a volume of several cubic millimetres and a power dissipation in the range ot tens of milliwatts. It is anticipated that this frequency reference will be capable of achieving a

Mitigation Strategies for Autogenous Shrinkage Cracking

August 1, 2004
Author(s)
O M. Jensen
As the use of high performance concrete has increased, problems with early-age cracking have become prominent. The reduction in w/c ratio, the incorporation of silica fume, and the increase in binder content of high performance concretes all contribute to
Displaying 37901 - 37925 of 74079