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Displaying 1401 - 1425 of 1947

Lithographic sonication patterning of large area nanopillar forests

July 27, 2017
Author(s)
Joel C. Weber, Matthew D. Brubaker, Thomas M. Wallis, Kristine A. Bertness
This paper demonstrates a highly-scalable, material-independent method for patterning nanopillar forests known as lithographic sonication patterning. Through contact lithography, patterns with dimensions down to 3 υm were written across a 3-inch silicon

Metal Additive Manufacturing Standardization in Support of Qualification and Certification

February 28, 2017
Author(s)
Mohsen Seifi, Michael Gorelik, Jess Waller, Nik Hrabe, Nima Shamsaei, Steve Daniewicz, John J. Lewandowski
As the metal Additive Manufacturing (AM) industry moves towards industrial production, the need for qualification standards covering all aspects of the technology becomes ever more prevalent. While some standards and specifications for documenting the

Effect of Wear Track Diameter on Tribological Behavior

February 19, 2017
Author(s)
S Jahanmir
Wear tests were conducted using a pin-on-disk tribometer to evaluate the effect of disk track diameter on the tribological behavior. High purity alumina balls were used as pins sliding against glass-ceramic (IPS empress 2) disks under distilled water

All-Dimensional H2-CO Potential: Validation with Fully Quantum Second Virial Coefficients

February 3, 2017
Author(s)
Giovanni Garberoglio, Piotr Jankowski, Krzysztof Szalewicz, Allan H. Harvey
We use a new high-accuracy all-dimensional potential to compute the cross second virial coefficient B12(T) between molecular hydrogen and carbon monoxide. The path-integral method is used to fully account for quantum effects. Values are calculated from 10

Stress in Aluminum Induced by Hydrogen Absorption during Cathodic Polarization

September 16, 2015
Author(s)
Gery R. Stafford, Jae W. Shin, Kurt Hebert
The hydrogen concentration in metals during aqueous corrosion is influenced by the kinetics of hydrogen absorption. Measurements of absorption kinetics are challenged by competing gas evolution and corrosion processes. However, in situ measurements of

Self Assembly of Magnetic Nanoparticles at Silicon Surfaces

June 21, 2015
Author(s)
Katharina Theis-Brohl, Philipp Gutfreund, Alexei Vorobiev, Max Wolff, Boris P. Toperverg, Joseph Dura, Julie Borchers
Neutron reflectometry was used to study the assembly of magnetite nanoparticles in a water-based ferrofluid close to a silicon surface, Under three conditions, static, under shear and with a magnetic field, the depth profile is extracted. The particles

Scaling of Testing Speed for Different Source-to-Detector Distances

February 13, 2015
Author(s)
Bruce R. Norman, Anne L. Sallaska, Leticia Pibida
Several American National Standard Institute/Institute of Electrical and Electronics Engineers (ANSI/IEEE) and International Electrotechnical Commission (IEC) standards were developed for radiation detection systems used for homeland security applications

Attosecond timing in optical-to-electrical conversion

February 10, 2015
Author(s)
Frederick N. Baynes, Franklyn J. Quinlan, Tara M. Fortier, Qiugui Zhou, Andreas Beling, Joe C. Campbell, Scott A. Diddams
The most frequency-stable sources of electromagnetic radiation are produced optically, and optical frequency combs provide the means for high fidelity frequency transfer across hundreds of terahertz and into the microwave domain. A critical step in the

Estimating Fault Detection Effectiveness

April 1, 2014
Author(s)
David R. Kuhn, Raghu N. Kacker, Yu Lei
[Poster] A t-way covering array can detect t-way faults, however they generally include other combinations beyond t-way as well. For example, a particular test set of all 5-way combinations is shown capable of detecting all seeded faults in a test program

Guidance on Fire Emergency Procedures for Emergency Stair Travel Devices

November 26, 2013
Author(s)
Erica D. Kuligowski
This document provides specific detailed guidance and recommendations on the use of emergency stair travel devices, or stair descent devices, for evacuation of persons with mobility impairments during fire emergencies in buildings. The people who would

Efficient Algorithms for T-way Test Sequence Generation

October 16, 2012
Author(s)
Linbin Yu, Yu Lei, Raghu N. Kacker, D. Richard Kuhn, James F. Lawrence
Combinatorial testing has been shown to be a very effective testing strategy. Most work on combinatorial testing focuses on t-way test data generation, where each test is an unordered set of parameter values. In this paper, we study the problem of t-way

Quantum simulation of the hexagonal Kitaev model with trapped ions

November 25, 2011
Author(s)
Dietrich G. Leibfried, Roman Schmied , Janus H. Wesenberg
We present a detailed study of quantum simulations of coupled spin systems in surface-electrode ion-trap arrays, and illustrate our findings with a proposed implementation of the hexagonal Kitaev model [A. Kitaev, Annals of Physics 321,2 (2006)]. The e

Inhibition of Silane Ignition by Iodine Containing Additives

October 16, 2008
Author(s)
Valeri I. Babushok, Wing Tsang
The results of numerical studies on the influence of iodine and hydrogen iodide additives on silane self-ignition limits are reported. The entire matrix of possibilities with regard to silane and oxygen ratios was covered. The temperature and pressures

NIST 62. NIST/NRIM High Temperature Superconductors Database: Version 2.0

October 16, 2008
Author(s)
R G. Munro
The database of materials properties provides evaluated property data for high temperature superconductors.The range of materials covers the many series of compounds derived from the Y-Ba-Cu-O, Bi-Sr-Ca-Cu-O, Tl-Sr-Ca-Cu-O and La-Cu-O chemical families

Overview of the TREC 2005 Question Answering Track

October 2, 2006
Author(s)
Ellen M. Voorhees, Hoa T. Dang
The TREC 2005 Question Answering (QA) track contained three tasks: the main question answering task, the document ranking task, and the relationship task. In the main task, question series were used to define a set of targets. Each series was about a
Displaying 1401 - 1425 of 1947
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