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Displaying 10701 - 10725 of 73893

Chip-scale atomic diffractive optical elements

December 31, 2018
Author(s)
Liron Stern, Douglas G. Bopp, Susan A. Schima, Vincent N. Maurice, John E. Kitching
Atomic systems have long provided a useful material platform with unique quantum properties. The efficient light-matter interaction in atomic vapors has led to numerous seminal scientific achievements including accurate and precise metrology 1-3 and

Hydrofluorocarbons (HFCs)

December 31, 2018
Author(s)
Vladimir L. Orkin, Stephen A. Montzka, Guus J. Velders, Paul B. Krummel, Malte Meinshausen, J. Muhle, Sunyoung Park

Improving Rigid-Body Registration Based on Points Affected by Bias and Noise

December 31, 2018
Author(s)
Marek Franaszek, Geraldine S. Cheok
The task of registering two coordinate frames is frequently accomplished by measuring the same set of points in both frames. Noise and possible bias in the measured locations degrade the quality of registration. It was shown that the performance of

Near-Surface Elemental Analysis of Solids by Neutron Depth Profiling

December 31, 2018
Author(s)
Jamie Weaver, Robert Gregory Downing
Neutron Depth Profiling (NDP) is an analytical nuclear technique for the determination of elemental mass as a function of depth into a sample's surface. It is suitable for characterizing a few select elements in most solid materials to depths of

Boehmite and Gibbsite Nanoplates for the Synthesis of Advanced Alumina Products

December 28, 2018
Author(s)
Xin Zhang, Patricia L. Huestis, Carolyn I. Pearce, Jian Zhi Hu, Katharine Page, Lawrence M Anovitz, Alexandr B. Aleksandrov, Micah P. Prange, Sebastien Kerisit, Mark E. Bowden, Wenwen Cui, Zheming Wang, Nicholas R. Jaegers, Trent R. Graham, Mateusz Dembowski, Hsiu-Wen Wang, Jue Liu, Alpha T. N'Diaye, Markus Bleuel, David F. Mildner, Thomas M. Orlando, Greg A. Kimmel, Jay A. La Verne, Sue B. Clark, Kevin M. Rosso
Boehmite (γ-AlOOH) and gibbsite (α-A;(OH) 3) are important archetype (oxy)hydroxides of aluminum in nature that also play diverse roles across a plethora of industrial applications. As a consequence, highly precise synthesis of these pure phases with

Frequently Asked Questions About Commercial Hydrogen Vehicle Refueling

December 28, 2018
Author(s)
Juana S. Williams
"Commonly asked questions about hydrogen fuel cell electric vehicles (HFCEV) and hydrogen fuel availability, technology, safety; and the legal metrology requirements and terminology applicable to hydrogen fuel quality, measuring equipment, method of sale

Microwave Monitoring of Atmospheric Corrosion of Interconnects

December 28, 2018
Author(s)
Papa Amoah, Dmitry Veksler, Christopher E. Sunday, Stephane Moreau, David Bouchu, Yaw S. Obeng
Traditional metrology has been unable to adequately address the reliability needs of emerging integrated circuits at the nano scale; thus, new metrology and techniques are needed. In this paper, we use microwave propagation characteristics (insertion

Nondegenerate Parametric Resonance in Large Ensembles of Coupled Micromechanical Cantilevers with Varying Natural Frequencies

December 28, 2018
Author(s)
Christopher B. Wallin, Roberto De Alba, Daron Westly, Glenn Holland, Scott Grutzik, Richard Rand, Alan Zehnder, Vladimir Aksyuk, Slava Krylov, Robert Ilic
We investigate the collective dynamics and nondegenerate parametric resonance (NPR) of coplanar, interdigitated arrays of microcantilevers distinguished by their cantilevers having linearly expanding lengths and thus varying natural frequencies. Within a

Evidence for multiple mechanisms underlying surface-electric field noise in ion traps

December 27, 2018
Author(s)
J. A. Sedlacek, J. Stuart, Daniel Slichter, C. D. Bruzewicz, R. McConnell, J. M. Sage, J. Chiaverini
Energetic ion bombardment, or ion milling, of ion-trap electrode surfaces has previously been shown to reduce electric-field noise, a limit to quantum-logic gate fidelity, generated by the surface. Here, using motional heating of a single trapped strontium

In-situ near-field probe microscopy of plasma processing

December 27, 2018
Author(s)
Alexander Tselev, Jeffrey Fagan, Andrei Kolmakov
There exists a great necessity for in situ nanoscale characterization of surfaces and thin films during plasma treatments. To address this need, the current approaches rely on either ‘post mortem' sample microscopy, or in situ optical methods. The latter

Effects of Ionic Strength, Salt, and pH on Aggregation of Boehmite Nanocrystals: Tumbler Small-Angle Neutron and X-ray Scattering and Imaging Analysis

December 26, 2018
Author(s)
L. M. Anovitz, X. Zhang, J. Soltis, E. Nakouzi, A. J. Krzysko, J. Chun, G. K. Schenter, T. R. Graham, K. M. Rosso, J. J. De Yoreo, A. G. Stack, Markus Bleuel, Cedric V. Gagnon, David F. Mildner, J. Ilavsky, I. Kuzmenko
The U.S. government currently spends significant resources annually managing the legacies of the Cold War, including 300 million liters of highly radioactive wastes stored in hundreds of tanks at the Hanford Site (WA) and the Savannah River Site (SC). The
Displaying 10701 - 10725 of 73893
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