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NIST Authors in Bold

Displaying 19026 - 19050 of 73697

Short-Range Magnetic Correlations in the Highly-Correlated Electron Compound CeCu 4 Ga

September 25, 2014
Author(s)
B. G. Ueland, C. F. Miclea, K. Gofryk, Yiming Qiu, F. Ronning, R. Movshovich, E. D. Bauer, J. S. Gardner, J. D. Thompson
We report results from experiments on the heavy-electron compound CeCu 4Ga which show that it possesses short-range magnetic correlations down to a temperature of T = 0.1 K. A peak occurs in the specific heat at T* = 1.2 K, but the specific heat remains

Detection of Hazardous Liquids using Microwave

September 24, 2014
Author(s)
Michael D. Janezic, Jolene D. Splett, Kevin J. Coakley, James R. Baker-Jarvis
The primary objective of this study is to determine the feasibility of using low-power microwaves to distinguish between hazardous and non-hazardous liquids at security checkpoints. According to the 2008 High-Priority Technology Needs, a report published

High-efficiency WSi superconducting nanowire single-photon detectors operating at 2.5 K

September 24, 2014
Author(s)
Varun B. Verma, Boris Korzh, Felix Bussieres, Robert D. Horansky, Adriana E. Lita, Francesco Marsili, Hugo Zbinden, Richard P. Mirin, Sae Woo Nam
We demonstrate that superconducting nanowire single photon detectors (SNSPDs) fabricated from amorphous WSi may be operated with > 75 % system detection efficiency at a temperature approaching seventy percent of the superconducting transition temperature

Generalizing Face Quality and Factor Measures to Video

September 23, 2014
Author(s)
Yooyoung Lee, P. Jonathon Phillips, James Filliben, J. R. Beveridge, Hao H. Zhang
Methods for assessing the impact of factors and image-quality metrics for still face images are well-understood. The extension of these factors and quality measures to faces in video has not, however, been explored. We present a specific methodology for

Inhibition of cellular proliferation and enhancement of hydrogen peroxide production in fibrosarcoma cell line by weak radio frequency magnetic fields

September 23, 2014
Author(s)
Pablo Castello, Iain Hill, Lucas Portelli, Frank Barnes, Robert J. Usselman, Carlos Martino
This study presents experimental data for the effects of weak radio frequency (RF) magnetic fields on hydrogen peroxide (H2O2) production and cellular growth rates of fibrosarcoma HT1080 cells in vitro. Cells were exposed either to 45mT static magnetic

Interferometric Measurement of the Current-Phase Relationship of a Superfluid Weak Link

September 22, 2014
Author(s)
Stephen Eckel, Fred Jendrzejewski, Avinash Kumar, Christopher J. Lobb, Gretchen K. Campbell
Weak connections between superconductors or superfluids differ from classical links due to quantum coherence, which allows flow without resistance. Transport properties through such weak links can be described with a single function, the current-phase

Performance evaluation of fingerprint open-set identification algorithms

September 22, 2014
Author(s)
Elham Tabassi, Craig I. Watson, Gregory P. Fiumara
We report performance of one-to-many fingerprint identification algorithms using one, two, four, eight or ten fingers for recognition. Performance is quantified in terms of recognition accuracy (false positive and false negative identification rate)

Photochemical Properties of Hydrofluoroethers CH3OCHF2, CH3OCF3, and CHF2OCH2CF3: Reactivity toward OH, IR Absorption Cross Sections, Atmospheric Lifetimes and Global Warming Potentials

September 22, 2014
Author(s)
Vladimir L. Orkin, Victor Khamaganov, A G. Guschin
Rate constants for the gas phase reactions of OH radicals with three partially fluorinated ethers, CH3OCF3 (kHFE-143a), CH3OCHF2 (kHFE-152a), and CHF2OCH2CF3 (kHFE-245fa), were measured using a discharge flow – electron paramagnetic resonance technique

Photoelectron spectroscopy of wet and gaseous samples through electron transparent graphene membranes

September 22, 2014
Author(s)
Jurgen Kraus, Robert Reichelt, Sebastian Gunther, Luca Gregoratti, Tang Lin Teo, Maya Kiskinova, Alexander Yulaev, Ivan Vlassiouk, Andrei Kolmakov
Photoelectron spectroscopy (PES) and microscopy are highly demanded for exploring morphologically complex solid-gas and solid-liquid interfaces under realistic conditions but the very small electron mean free path inside the dense media imposes serious

TESTING AND ANALYSES OF COPOLYMER FIBERS BASED ON 5-AMINO-2-(P-AMINOPHENYL)-BENZIMIDAZOLE

September 22, 2014
Author(s)
Walter G. McDonough, Joy P. Dunkers, Amanda L. Forster, Jae Hyun Kim, Scott A. Wight, Gale A. Holmes
Since the well-publicized failure of a body armor used by a police officer at a threat level the armor had been designed to survive, it has become imperative that the long-term properties and performance of new fibers being considered for use be understood

Fully Quantum Cross Second Virial Coefficients for the Three-Dimensional He-H2 Pair

September 21, 2014
Author(s)
Giovanni Garberoglio, Konrad Patkowski, Allan H. Harvey
We use a recent high-accuracy three-dimensional potential to compute the cross second virial coefficient B12(T) between helium and molecular hydrogen. The path-integral method used in this work fully accounts for both the flexibility of the hydrogen

Automated Ranking of Stem Cell Colonies by Translating Biological Rules to Computational Models

September 20, 2014
Author(s)
Adele P. Peskin, Steven P. Lund, YaShian Li-Baboud, Michael W. Halter, Anne L. Plant, Peter Bajcsy
This paper addresses the problem of automating an image ranking process for stem cell colonies. We automate the manual process in a novel way: instead of fitting off-the-shelf image features and colony ranks to prediction models, we define a new feature

Toward Manufacturing System Composability Analysis: A Use Case Scenario

September 20, 2014
Author(s)
Boonserm Kulvatunyou, Evan K. Wallace, Nenad Ivezic, Yunsu Lee
One of the characteristics of a smart manufacturing system is the ability to quickly adapt to new and changing requirements. This implies that software and hardware components of the manufacturing system need to be easily composed and recomposed. In

Assessing the Verification and Validation of Building Fire Evacuation Models

September 19, 2014
Author(s)
Enrico Ronchi, Erica D. Kuligowski, Daniel Nilsson, Richard Peacock, Paul A. Reneke
To date there is no International standard on the verification and validation (V&V) of building fire evacuation models, i.e., model testers adopt inconsistent procedures or tests designed for other model uses. For instance, the tests presented within the

Charge Offset Stability in Si Single Electron Devices with Al Gates

September 19, 2014
Author(s)
Neil M. Zimmerman, Henry Yang, Nai Shyan Lai, Wee Han Lim, Andrew S. Dzurak
We report on the charge offset drift (time stability) in Si quantum dots defined with Al gates. The size of the charge offset drift (0.1 e) is intermediate between that of Al/AlO_x/Al tunnel junctions (greater than 1 e) and Si quantum dots defined with Si
Displaying 19026 - 19050 of 73697
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