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Displaying 4651 - 4675 of 13217

High-accuracy Fabry-Perot displacement interferometry using fiber lasers

August 8, 2011
Author(s)
Mathieu Durand, John R. Lawall, Yicheng Wang
… We describe ongoing work in a Fabry-Perot interferometry system designed to measure … fiber laser. We explore the improvement in resolution obtained as the frequency separation between … Measurement Science and Technology …

Ontological Behavior Modeling

May 20, 2011
Author(s)
Conrad E. Bock, James Odell
… techniques. The techniques are applied to behaviors in the Unified Modeling Language (UML), using the logical meanings for classification introduced in UML 2. The article suggests unifying UML's three kinds of … provides a formal semantics to clarify ambiguities in the current informal semantics, and increases the …

Bottlenose Dolphins as Indicators of Persistent Organic Pollutants in Waters Along the US East and Gulf of Mexico Coasts

May 15, 2011
Author(s)
John R. Kucklick, Lori Schwacke, Randall S. Wells, Aleta Hohn, Aurore Guichard, Jennifer Yordy, Larry Hansen, Eric Zolman, Rachel Wilson, J. L. Litz, Doug Nowacek, Teresa Rowles, Rebecca S. Pugh, Brian C. Balmer, Carrie Sinclair, Patricia Rosel
… diphenyl ether (PBDE) flame retardants were determined in 300 blubber biopsy samples from coastal and near … dolphins sampled included those that reside permanently in a given estuary, two coastal migratory stocks living along … bottlenose dolphin stock. All classes of legacy POPs in estuarine/coastal shore dolphins varied significantly (p …

Amplification of the optical absorption cross section for aerosols of soot with a nonabsorbing coating from photoacoustic measurements

May 13, 2011
Author(s)
Pedro Bueno, Daniel K. Havey, George W. Mulholland, Joseph T. Hodges, Keith A. Gillis, Russell R. Dickerson, Michael R. Zachariah
… for evaluating the Earth's energy balance. Uncertainty in the net radiative forcing of atmospheric aerosols is … properties for bare and externally mixed soot particles. In this laboratory study of flame-generated soot, we combine … cross section. The results are interpreted and modeled in terms of a core-shell geometry and Lorenz-Mie theory of …

Humic Acid-Mediated Silver Nanoparticle Formation Under Environmentally Relevant Conditions

April 1, 2011
Author(s)
Nelson Akaighe, Robert I. MacCuspie, Divina A. Navarro, Diana S. Aga, Sarbajit Banerjee, Mary Sohn, Virender K. Sharma
… nanoparticles (AgNPs) via reduction of silver ions (Ag+) in the presence of humic acids (HAs) under various … of AgNPs was observed by ultraviolet-visible spectroscopy in as few as (2 to 4) days at 22 oC, for SHAs and for SUW. An elevated temperature of 90 oC resulted in the accelerated appearance of the SPR within (45 to 90) …

Effects of Polyethyleneimine-Mediated Functionalization of Multi-Walled Carbon Nanotubes on Earthworm Bioaccumulation and Sorption by Soils

March 24, 2011
Author(s)
Elijah J. Petersen, Roger A. Pinto, Liwen Zheng, Qingguo Huang, Peter E. Landrum, Walter J. Weber
… (PEI) surface coatings to make them more stable in water and give them positive, negative or neutral surface … influences their interactions with soil. Differences in uptake behaviors were not apparent among the different … and MWNTs, results that indicated limited absorption in into the organism tissues. However, the elimination …

Nitrogen Contamination in Elastic Neutron Scattering

February 23, 2011
Author(s)
Song Xue Chi, Jeffrey W. Lynn, Ying Chen, William D. Ratcliff, Benjamin Ueland, Nicholas P. Butch, Shanta R. Saha, Kevin Kirshenbaum, Johnpierre Paglione
… Nitrogen gas accidentally sealed in a sample container produces various spurious effects in elastic neutron scattering measurements. These effects are … Measurement Science and Technology … Nitrogen Contamination in Elastic Neutron Scattering …

Compact GdBa 2 Cu 3 O 7-d coated conductor cables for electric power transmission and magnet applications

February 10, 2011
Author(s)
Daniel C. van der Laan, Xifeng Lu, Loren F. Goodrich
… together to form high current cables is required in, for instance, power transmission and low-inductance … techniques that have been applied so far have not resulted in compact, mechanically robust, high-current cables that … transmission lines that have been installed in the electric power grid to be reduced in diameter. The …

Evidence that the reversible strain effect on critical current density and flux pinning in Bi2Sr2Ca2Cu3Ox tapes is caused entirely by the pressure dependence of the critical temperature

December 23, 2010
Author(s)
Daniel C. van der Laan, J. F. Douglas, Cameron C. Clickner, Theodore C. Stauffer, Loren F. Goodrich, Hans J. van Eck
… is entirely responsible for a reversible change in critical current and magnetic flux pinning in Bi 2 Sr 2 Ca 2 Cu 3 O x tapes with strain. … Superconductor Science and Technology … strain effect on critical current density and flux pinning in Bi2Sr2Ca2Cu3Ox tapes is caused entirely by the pressure …

Influence of Polyethyleneimine Graftings of Multi-Walled Carbon Nanotubes on Their Accumulation and Elimination by and Toxicity to Daphnia magna

December 23, 2010
Author(s)
Elijah J. Petersen, Roger A. Pinto, Danielle J. Mai, Peter E. Landrum, Walter J. Weber
… (PEI) surface coatings to make the MWNTs more stable in water and to give them positive, negative, or neutral … rates. Elimination of the carbon nanotubes was not evident in all samples at both concentrations in the absence of algae, yet near complete removal was …

Metal-Insulator-Metal Surface Plasmon Polariton Waveguide Filters with Cascaded Transverse Cavities

December 23, 2010
Author(s)
Lorena O. Diniz, Frederico D. Nunes, Euclydes Marega, Jr., John Weiner, Ben-Hur V. Borges
… In this work we propose a new approach for the desgn of … presenting cascaded cavities transversely arranged in the midpoint between the input and output ports. An extra degree of freedom added to this design consists in tilting the cavities around their midpoints which, besides …

Characterizing a Scatterfield Optical Platform for Semiconductor Metrology

December 21, 2010
Author(s)
Bryan M. Barnes, Ravikiran Attota, Richard Quintanilha, Martin Y. Sohn, Richard M. Silver
… measured glare as functions of the position of an aperture in the conjugate to the back focal plane (CBFP) of the … as important as the inspection of other optical elements in the optical column. Reflectivity can be derived for line … Measurement Science & Technology …

The evaluation of a pyroelectric detector with a sprayed carbon multi-wall nanotube black coating in the infrared

October 31, 2010
Author(s)
John H. Lehman, Evangelos Theocharous
… multi-wall carbon nanotube (MWCNT) coating was evaluated in the 0.9 υm-24 υm wavelength range. The relative spectral … properties of the "sprayed" MWCNTs play an important role in the spatial uniformity of response profiles. The "sprayed" … other black coatings and it is relatively durable. This, in combination with the small variation observed in the …

Partitioning of Persistent Organic Pollutants (POPs) between Blubber and Blood of Wild Bottlenose Dolphins: Implications for Biomonitoring and Health

June 15, 2010
Author(s)
Jennifer Yordy, John R. Kucklick, Randall S. Wells, Brian C. Balmer, Lori Schwacke, Teresa Rowles
… (POPs) is heavily reliant on concentrations determined in blubber, and there are few data relating blubber concentrations and levels in blood. Matched blubber and plasma samples (n=56) were … PCB 209, lipid-normalized concentrations of the major POPs in blubber and plasma were positively and significantly …

Temporal and Spatial Trends of Perfluorinated Compounds in Juvenile Loggerhead Sea Turtles (Caretta caretta) along the East Coast of the United States

May 21, 2010
Author(s)
Jennifer M. Lynch, John R. Kucklick, Steven O'Connell
… well as large-scale spatial trends of PFC concentrations in threatened juvenile loggerhead sea turtles from Florida … (PFNA) significantly decreased from 2000-2008 in the SC turtles annually by 20% and 11%, respectively (p ≤ … to pinpoint specific sources and transport pathways in areas with higher PFC contamination, and assess turtle …

Effect of strain, magnetic field and field angle on the critical current density of YBa 2 Cu 3 O 7-d coated conductors

May 18, 2010
Author(s)
Daniel C. van der Laan, J. F. Douglas, John (Jack) W. Ekin, Loren F. Goodrich, Theodore C. Stauffer, Cameron C. Clickner
… A large, magnetic-field-dependent, reversible reduction in critical current density with axial strain in YBa 2 Cu 3 O 7-δ coated conductors at 75.9 K has been … for the performance of YBa 2 Cu 3 O 7-δ coated conductors in applications where the conductor experiences large …

Microstructural Evolution of Pd-doped Nanoscale Zero-valent Iron (nZVI) Particles in Aqueous Media and Implications for Particle Reactivity

May 6, 2010
Author(s)
Andrew A. Herzing, Weile Yan, Christopher J. Kiely, Wei-xian Zhang
… the distribution of palladium within the nanoparticles. In this work, structural evolution of palladized nanoscale … the aged bimetallic particles display an 80% decrease in dechlorination rate of trichloroethene (TCE) compared to … also shed new insight on the function of palladium in hydrodechlorination reactions, nZVI particle aging and …
Displaying 4651 - 4675 of 13217
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