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Displaying 20376 - 20400 of 73751

ENVIRONMENTAL METABOLOMICS: NMR TECHNIQUES

December 8, 2013
Author(s)
Myrna Simpson, Dan Bearden
Environmental metabolomics is a rapidly growing area of research, and over the last decade the focus has been on organism responses to various types of environmental stressors (pollutants, nutritional shifts, and global climate change, for example)

Sparse Embedding-based Domain Adaptation for Object Recognition

December 8, 2013
Author(s)
P J. Phillips, Jingjing Zheng, Rama Chellappa
Domain adaptation algorithms aim at handling the shift between source and target domains. A classifier is trained on images from the source domain; and the classifier recognizes objects in images from the target domain. In this paper, we present a joint

Dynamical Arrest in Adhesive Hard-Sphere Dispersions Driven by Rigidity Percolation

December 6, 2013
Author(s)
Nestor E. Valadez-Perez, Yun Liu, Aaron P. R. Eberle, Norman J. Wagner, Ramon Castaneda-Priego
One major goal in condensed matter physics is identifying the physical mechanisms that lead to arrested states of matter, especially gels and glasses. The complex nature and microscopic details of each particular system are relevant. However, from both

High-Accuracy Measurements of the Vapor Pressure of Ice Referenced to the Triple Point

December 6, 2013
Author(s)
Katarzyna E. Bielska, Daniel K. Havey, Gregory E. Scace, D Lisak, Allan H. Harvey, Joseph T. Hodges
The vapor pressure of hexagonal (Ih) ice was measured over the temperature range 175 K to 253.4 K and referenced to the value at the triple point of water. This experiment combined a highly accurate humidity generation system containing an ice-coated

Impact of UV Irradiation on the Surface Chemistry and Structure of Multiwall Carbon Nanotube Epoxy Nanocomposites

December 6, 2013
Author(s)
Elijah Petersen, Thomas F. Lam, Justin Gorham, Keana Scott, Chris Long, Deborah Jacobs, Renu Sharma, James Alexander Liddle, Tinh Nguyen
One of the most promising applications of nanomaterials is as nanofillers to enhance the properties of polymeric materials. However, the effect of nanofillers on polymers subject to typical environmental stresses, such as ultraviolet (UV) radiation, high

Muon Spin Relaxation and Electron/Neutron Diffraction Studies of BaTi 2 (As 1-x Sb x ) 2 O: Absence of Static Magnetism and Superlattice Reflections

December 6, 2013
Author(s)
Y. Nozaki, K. Nakano, T. Yajima, H. Kageyama, B. Frandsen, L Liu, S. Cheung, T. Goko, Y. J. Uemura, T.S.J. Munsie, T. Medina, G. M. Luke, J. Munevar, D. Nishio-Hamane, Craig Brown
We present the results of muon spin relaxation/rotation, transmission electron microscopy, and neutron diffraction measurements performed on several specimens of BaTi 2(As 1-xSb x) 2O, which is known to have either charge density or spin density wave

Spatial-Temporal Modeling of Extreme Bottom-Up Filling of Through-Silicon-Vias

December 6, 2013
Author(s)
Daniel Wheeler, Thomas P. Moffat, Daniel Josell
Extreme bottom-up superfilling of annular through-silicon-vias (TSV) during copper electrodeposition has been reported wherein metal deposits on the bottom surface of the TSV with negligible deposition on its sidewalls or the field around it. The growth

Distance-Dependent Ultrafast Dynamics at H2Pc\C60 Interfaces

December 5, 2013
Author(s)
Gregory J. Dutton, Steven W. Robey
We investigated the distance-dependence of interfacial charge transfer processes at the donor-acceptor heterojunction formed between H2Pc and C60. The interface region was formed layer-by-layer using organic molecular beam epitaxy (MBE). For each thickness

Phase inversion and collapse of the cross-spectral function

December 5, 2013
Author(s)
Craig W. Nelson, Archita Hati, David A. Howe
Cross-spectral analysis is a mathematical tool for extracting the power spectral density of a correlated signal from two time series in the presence of uncorrelated interfering signals. We demonstrate and explain a set of conditions where the detection of

Three-Corner Hat Analysis of the Stability of UTC and Various UTC(k)s

December 5, 2013
Author(s)
Thomas E. Parker
The stabilities of some local UTC time scales have recently improved dramatically with the increasing use of cesium or rubidium fountains as nearly always present frequency references. Along with time scales using maser ensembles, there are now a number of

Additive Manufacturing Technical Workshop Summary Report

December 4, 2013
Author(s)
Christopher U. Brown, Joshua Lubell, Robert R. Lipman
This report summarizes the presentations, discussions, and recommendations from the Additive Manufacturing Technical Workshop held during the PDES, Inc. offsite meeting in Gaithersburg, Maryland in March of 2013. The purpose of the workshop was to identify

Capture and isolation of highly-charged ions in a compact Penning trap: V12

December 4, 2013
Author(s)
Samuel Brewer, Nicholas D. Guise, Joseph Tan
Room-temperature, compact Penning traps have been shown recently to be useful for capture and storage of highly-charged ions extracted from an EBIT ion source at the National Institute of Standards and Technology (NIST). Highly-charged argon and neon ions

Standardization of 237Np

December 4, 2013
Author(s)
Lizbeth Laureano-Perez, Ryan P. Fitzgerald, Ronald Colle
The standardization of 237Np was investigated. The certified massic activity for 237Np was obtained by 4 liquid scintillation (LS) counting with correction for the 233Pa daughter using the CIEMAT/NIST efficiency tracing method using a 3H standard

Composition-Explicit Distillation Curves of Alternative Turbine Fuels

December 3, 2013
Author(s)
Raina V. Gough, Thomas J. Bruno
In recent years, environmental considerations, the potential for supply disruptions, and rising fuel prices have led to the development of turbine fuels produced from non-petroleum feedstocks. To determine the suitability of an alternative turbine fuel, it

Preliminary Reconnaissance of the May 20, 2013, Newcastle-Moore Tornado in Oklahoma

December 3, 2013
Author(s)
Erica D. Kuligowski, Long Phan, Marc L. Levitan, David P. Jorgensen
This is a report on the National Institute of Standards and Technology (NIST) reconnaissance to collect information on the performance of one critical facility and two educational facilities in the May 20, 2013, Newcastle-Moore tornado in Oklahoma. The
Displaying 20376 - 20400 of 73751
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