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Displaying 27276 - 27300 of 73929

NETWORK-CENTRIC PRODUCT REALIZATION AND THE ROLE OF STANDARDS

February 18, 2010
Author(s)
Ram D. Sriram, Albert W. Jones, Mahesh Mani, Sudarsan Rachuri, Eswaran Subrahmanian
The early part of this millennium has witnessed the emergence of an Internet-based engineering marketplace. Here, engineers, designers, and manufacturers from small and large companies can collaborate electronically in various product development and

Performance Measures Framework for Unmanned Systems (PerMFUS): Initial Perspective

February 18, 2010
Author(s)
Hui-Min Huang, Elena R. Messina, Adam S. Jacoff
The performance of intelligent unmanned systems (UMS) must be able to be measured to ensure that they can meet the operational requirements. A generic framework to enable capturing and organizing the performance metrics are highly desirable. In this

A Combinatorial Study of Thin Film Process Variables Using Microhotplates

February 17, 2010
Author(s)
David L. Lahr, Joshua L. Hertz, Stephen Semancik
A major goal of materials research over the past two decades has been the development of high throughput methods for rapid discovery and optimization of processing routes. These methods rely on highly parallel materials synthesis to efficiently create

Frequency Comparison of Two High-Accuracy Al+ Optical Clocks

February 17, 2010
Author(s)
Chin-Wen Chou, David Hume, J.C. Koelemeij, David J. Wineland, Till P. Rosenband
We have constructed an optical clock with a fractional frequency inaccuracy of 8.6e-18, based on quantum logic spectroscopy of an Al+ ion. A simultaneously trapped Mg+ ion serves to sympathetically laser-cool the Al+ ion and detect its quantum state. The

Proceedings of the 2009 Workshop on Innovative Fire Protection

February 17, 2010
Author(s)
Anthony P. Hamins, Francine K. Amon, Jason D. Averill, Nelson P. Bryner, David T. Butry, Rick D. Davis, Richard G. Gann, Jeffrey W. Gilman, Samuel L. Manzello, Randall J. McDermott, William E. Mell, Nathan D. Marsh
The Innovative Fire Protection Workshop was held at the National Institute of Standards and Technology (NIST) on June 4 and 5, 2009. The 70 participants represented a broad range of stakeholder perspectives, including various non-profit, academic, industry

Quantifying How Lighting and Focus Affect Face Recognition Performance

February 16, 2010
Author(s)
P J. Phillips, J. R. Beveridge, Bruce A. Draper, David Bolme, Geof H. Givens, Yui M. Lui
Recent studies show that face recognition in uncontrolled images remains a challenging problem, although the reasons why are less clear. Changes in illumination are one possible explanation, although algorithms developed since the advent of the PIE and

Heralded, pure-state single-photon source based on a Potassium Titanyl Phosphate waveguide

February 15, 2010
Author(s)
Zachary H. Levine, Jingyun Fan, Jun Chen, Alexander E. Ling, Alan L. Migdall
WWe analyze the generation of single spatial mode, spectrally uncorrelated photon pairs via type II spontaneous parametric downconversion in a Potassium Titanyl Phosphate (KTP) waveguide using real experimental parameters. We show that this source can be

Steady-state and transient photoconductivity in c-axis GaN nanowires grown by nitrogen-plasma-assisted molecular beam epitaxy

February 12, 2010
Author(s)
Norman A. Sanford, Paul T. Blanchard, Kristine A. Bertness, Lorelle Mansfield, John B. Schlager, Aric W. Sanders, Alexana Roshko, Beau Burton, Steven George
Analysis of steady-state and transient photoconductivity measurements at room temperature performed on c-axis oriented GaN nanowires yielded estimates of free carrier concentration, drift, mobility, surface band bending, and surface capture coefficient for

Challenges in Continuum Modeling of Intergranular Fracture

February 11, 2010
Author(s)
Valerie R. Coffman, James P. Sethna
Intergranular fracture in polycrystals is often simulated by finite elements coupled to a cohesive-zone model for the interfaces, requiring cohesive laws for grain boundaries as a function of their geometry. We discuss three challenges in understanding

Concrete nanoscience and nanotechnology: Definitions and applications

February 10, 2010
Author(s)
Edward Garboczi
There are many improvements needed in concrete, especially for use in renewal and expansion of the world's infrastructure, e.g. increased durability, decreased brittleness and increased tensile strength, and use of non-traditional materials like fly ash

Interfacial reactions of Ba2YCu3O6+x with Coated Conductor Buffer Layer, LaMnO3

February 10, 2010
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Lawrence P. Cook, James A. Kaduk
Chemical interactions between the Ba2YCu3O6+x superconductor and the LaMnO3 buffer layers employed in coated conductors have been investigated experimentally by determining the phases formed in the Ba2YCu3O6+x - LaMnO3 system. The Ba2YCu3O6+x - LaMnO3 join

Rational synthesis and characterization of a new family of low thermal conductivity misfit layered compounds [(PbSe)0.99]m[(WSe2)]n

February 9, 2010
Author(s)
Ian M. Anderson, Michael D. Anderson, Qiyin Lin, Mary Smeller, Colby L. Heideman, Paul Zschack, Mikio Koyano, Robert Kykyneshi, Douglas A. Keszler, David C. Johnson
We describe here a general synthesis approach for the preparation of new families of misfit layer compounds and demonstrate its effectiveness through the preparation of the first 64 members of the [(PbSe)0.99]m(WSe2)n family of compounds, where m and n are
Displaying 27276 - 27300 of 73929
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