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Displaying 16276 - 16300 of 73892

Geometrical pumping with a Bose-Einstein condensate

May 20, 2016
Author(s)
Lauren M. Aycock, Dina Genkina, Seiji Sugawa, Max Schemmer, Hsin I Lu, Ian Spielman
We realized a quantum "charge" pump for a Bose-Einstein condensate (BEC) in a novel bipartite magnetic lattice, whose bands are characterized by non-trivial topological invariants: the Zak phases. For each band, the Zak phase is determined by that band's

Multiple Sensor Detection of Process Phenomena in Laser Powder Bed Fusion

May 20, 2016
Author(s)
Brandon M. Lane, Eric P. Whitenton, Shawn P. Moylan
Laser powder bed fusion (LPBF) is an additive manufacturing (AM) process in which a high power laser melts metal powder layers into complex, three-dimensional shapes. LPBF parts are known to exhibit relatively high residual stresses, anisotropic

Pore Chemistry and Size Control in Hybrid Porous Materials for Acetylene Capture from Ethylene

May 20, 2016
Author(s)
Xili Cui, Kaijie Chen, Huabin Xing, Qiwei Yang, Rajamani Krishna, Zongbi Bao, Hui Wu, Wei Zhou, Xinglong Dong, Yu Han, Bin Li, Qilong Ren, Michael J. Zaworotko, Banglin Chen
The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation and purification through physisorption. We report control over pore chemistry and size in copper coordination networks

Representation of PIV Chain-of-Trust for Import and Export

May 20, 2016
Author(s)
Hildegard Ferraiolo, Ramaswamy Chandramouli, Ketan L. Mehta, Jason Mohler, Stephen Skordinski, Steven Brady
This document provides a common XML-based data representation of a chain-of-trust record to facilitate the exchange of PIV Card enrollment data. The exchanged record is the basis to personalize a PIV Card for a transferred employee and also for service

Towards a dynamic pressure standard based on laser absorption spectroscopy

May 20, 2016
Author(s)
Kevin O. Douglass, Douglas A. Olson
We describe an approach for creating a cost-effective, field deployable dynamic pressure standard based on measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we plan on

Towards Annotations and Product Definitions for Additive Manufacturing

May 20, 2016
Author(s)
Paul W. Witherell, Gaurav Ameta, Jennifer Herron
As AM is viewed more and more as a production-capable technology, the costs of complexity have become increasingly apparent in the form of information requirements. With design flexibilities come the need to capture and communicate complex shapes. In

Characterization of Buried Interfaces with Scanning Probe Microscopes

May 19, 2016
Author(s)
Joseph J. Kopanski, Lin You, Jungjoon Ahn, Yaw S. Obeng
Scanning probe microscopes (SPMs) have some capability to image sub-surface structure, including the details of buried interfaces. This paper describes the theoretical and practical basis for obtaining information about shallow buried interfaces

Depletion-Driven Crystallization of Cubic Colloids Sedimented on a Surface

May 19, 2016
Author(s)
Harold W. Hatch, William P. Krekelberg, Steven D Hudson, Vincent K. Shen
Cubic colloids, sedimented on a surface and immersed in a solution of depletant molecules, were modeled with a family of shapes which smoothly varies from squares to circles. Using Wang-Landau simulations with expanded ensembles, we observe the formation

Interaction driven exotic quantum phases in spin-orbit coupled lattice spin?1 bosons

May 19, 2016
Author(s)
Ian B. Spielman, Jedediah Pixley, Stefan Natu, Sankar Das Sarma
We study the interplay between large-spin, spin-orbit coupling, and superfluidity for bosons in a two dimensional optical lattice, focusing on the spin-1 spin-orbit coupled system recently realized at the Joint Quantum Institute [Campbell et. al., arXiv

Low Frequency Radio Wave Detection of Electrically Active Defects in Dielectrics

May 19, 2016
Author(s)
Yaw S. Obeng, Chukwudi A. Okoro, Pavel Kabos, Rhonda R. Franklin, Papa K. Amoah
In this paper, we discuss the use of low frequency (up to 300 MHz) radio waves (RF) to detect and characterize electrical defects present in the dielectrics of emerging integrated circuit devices. As an illustration, the technique is used to monitor the

On various nonlinearity measures for boolean functions

May 19, 2016
Author(s)
Joan Boyar, Magnus G. Find, Rene Peralta
A necessary condition for the security of cryptographic functions is to be "sufficiently distant" from linear, and cryptographers have proposed several measures for this distance. We show that six common measures, nonlinearity, algebraic degree

Visualizing edge states with an atomic Bose gas in the quantum Hall regime

May 19, 2016
Author(s)
Ian B. Spielman, Ben Stuhl, Hsin I Lu, Lauren M. Aycock, Dina Genkina
We engineered a two-dimensional magnetic lattice in an elongated strip geometry, with effective per-plaquette flux $\approx4/3$ times the flux quanta. We imaged the localized edge and bulk states of atomic Bose-Einstein condensates in this strip. Further

Approaching the quantum limit for plasmonics: linear atomic chains

May 18, 2016
Author(s)
Garnett W. Bryant
Optical excitations in atomic scale materials can be strongly mixed, having contributions from both single-particle transitions and collective response. This complicates the quantum description of these excitations, because there is no clear way to define

Hydration-Induced Spin-Glass State in a Frustrated Na-Mn-O Triangular Lattice

May 18, 2016
Author(s)
Ioanna Bakaimi, Rosaria Brescia, Craig Brown, Alexander A. Tsirlin, Mark A. Green, Alexandros Lappas
Birnessite compounds are stable across a wide range of compositions that produces a remarkable diversity in their physical, electrochemical and functional properties. These are hydrated analogues of the magnetic frustrated, mixed-valent manganese oxide

Modeling of Suspension Flow in a Pipe Geometry and Rheometers

May 18, 2016
Author(s)
Nicos Martys, Chiara F. Ferraris, William L. George
Abstract Measurement and prediction of the flow of suspensions like cement based materials represents a significant challenge for both the experimentalist and modeler. In this paper, results of a computational study of suspension flow in a pipe and a

Preface (Semiconductor Materials for Solar Photovoltaic Cells)

May 18, 2016
Author(s)
Winnie Wong-Ng, Mariappan Paranthaman, Raghu Bhattacharya
This introductory chapter briefly describes the book "Semiconductor Materials for Solar Photovoltaic Cells", coedited by M. Parans Paranthaman, Winnie Wong-Ng, and Raghu N. Bhattacharya (Springer US, 2015). This essential reference provides the most
Displaying 16276 - 16300 of 73892
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