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Displaying 22626 - 22650 of 73741

Photoluminescence Polarization in Strained GaN/AlGaN Core/Shell Nanowires

August 17, 2012
Author(s)
G. Jacopin, L. Rigutti, S. Bellei, P. Lavenus, F. H. Julien, Albert Davydov, Denis Tsvetkov, Kristine A. Bertness, Norman Sanford, John B. Schlager, M. Tchemycheva
The polarization properties of GaN/AlGaN core/shell nanowire (NW) heterostructures have been investigated using polarization resolved micro-photoluminescence (µ-PL) and interpreted in terms of a strain dependent 6x6 k.p theoretical model. The NW

Design and Fabrication of a Three-DoF MEMS Stage Based on Nested Structures

August 15, 2012
Author(s)
Yong Sik Kim, Nicholas G. Dagalakis, Satyandra K. Gupta
This paper presents the design, fabrication and testing of a Micro Electro Mechanical Systems (MEMS) based positioning stage which is capable of generating translational motions along X, Y and Z axes, respectively. For this purpose, two existing 1 Degree

Optical isolator using an atomic vapor in the hyperfine Paschen-Back regime

August 15, 2012
Author(s)
Svenja A. Knappe, L. Weller, K.S. Kleinbach, M.A. Zentile, I.G. Hughes, C.S. Adams
A light, compact optical isolator using an atomic vapor in the hyperfine Paschen-Back regime is presented. Absolute transmission spectra for experiment and theory through an isotopically pure 87Rb vapor cell show excellent agreement for fields of 0.6 T. We

Overview of the TREC-2010 Blog Track

August 15, 2012
Author(s)
Ian M. Soboroff, Iadh Ounis, Craig Macdonald
The Blog track aims to investigate the information seeking behavior in the blogosphere. The track was initiated in 2006, and has used an incremental approach in tackling several search tasks by their level of difficulty. In TREC 2010, the track has

Proposal for a standardized test artifact for additive manufacturing machines and processes

August 15, 2012
Author(s)
Shawn P. Moylan, John A. Slotwinski, April L. Cooke, Kevin K. Jurrens, M A. Donmez
Historically, standardized test parts are used to quantitatively evaluate the performance of a machine or process. While several different additive manufacturing (AM) test parts have been developed in the past, there are no current standard test parts. We

Web-enabled Real-time Quality Feedback for Factory Systems using MTConnect

August 15, 2012
Author(s)
John L. Michaloski, Byeong Eon Lee, Frederick M. Proctor, Sid Venkatesh
Quality is a key element to success for any manufacturer, and the fundamental prerequisite for quality is measurement. In the discrete parts industry, quality is attained through inspection of parts but typically there is a long latency between machining

High-resolution neutron radiography of through-plane liquid water distribution in polymer electrolyte membrane and gas diffusion layer

August 14, 2012
Author(s)
Daniel S. Hussey, David L. Jacobson, Richard Fu, Ugur Pasaogullari, Takeshi Shiomi, Yuichiro Tabuchi
We re-investigate our previously studied water transport phenomena under nonisothermal conditions by measuring the through-plane liquid water distribution across PEFC components with the state-of-the-art high-resolution neutron radiography. A corrective

On the Nonlinearity of Maximum-length NFSR Feedbacks

August 14, 2012
Author(s)
Meltem Sonmez Turan
Linear Feedback Shift Registers (LFSRs) are the main building block of many classical stream ciphers; however due to their inherent linearity, most of the LFSR-based designs do not offer the desired security levels. In the last decade, using Nonlinear

Recommended vapor pressure and thermophysical data for ferrocene

August 14, 2012
Author(s)
Michal Fulem, Kvetoslav Ruzicka, Marisa A. Rocha, Luis M.N.B.F. Santos, Robert F. Berg
Recommended vapor pressure data for ferrocene (CAS Registry Number: 102-54-5) in the temperature range from 242 to 447 K were developed by the simultaneous correlation of critically assessed vapor pressures, heat capacities of the crystalline phase and the

Model Based Enterprise / Technical Data Package Summit Report

August 13, 2012
Author(s)
Joshua Lubell, Kenway K. Chen, John A. Horst, Simon P. Frechette, Paul J. Huang
This report summarizes the presentations, discussions and recommendations of a workshop held at the National Institute of Standards and Technology in December of 2011. The purpose of the workshop was to identify challenges, research, and implementation

Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu 2 Ge 2

August 13, 2012
Author(s)
Deepak Singh, A. Thamizhavel, Jeffrey W. Lynn, S. K. Dhar, T. Hermann
Neutron diffraction measurements on a high quality single crystal of CeAu 2Ge 2 reveal two new magnetic structures that coexist with commensurate long range antiferromagnetic order below the Neel temperature T N {approximately equal} 14 K. The new magnetic

Partial-Transfer Absorption Imaging: A versatile technique for optimal imaging of ultracold gases

August 13, 2012
Author(s)
Gretchen K. Campbell, Sergio R. Muniz, Kevin Wright, Russell P. Anderson, William D. Phillips, Kristian Helmerson
Partial-transfer absorption imaging is a tool that enables optimal imaging of atomic clouds for a wide range of optical depths. In contrast to standard absorption imaging, the technique can be minimally-destructive and can be used to obtain multiple

Scintillation Yield and Time Dependence from Electronic and Nuclear Recoils in Liquid Neon

August 13, 2012
Author(s)
Kevin J. Coakley, W. H. Lippincott, D. Gastler, E. Kearns, D. N. McKinsey, J. A. Nikkel
We have performed measurements of scintillation light in liquid neon, observing a signal yield in our detector as high as (3.5 +/- 0.04) photoelectrons/keV. We measure pulse shape discrimination between electronic and nuclear recoils in liquid neon between
Displaying 22626 - 22650 of 73741
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