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Journals

Spin Transfer Torques by Point-Contact Spin injection

August 24, 2009

Author(s)

Tingyong Chen, Yi Ji, S X. Huang, C L. Chien, Mark D. Stiles

Spin-transfer torques (STT) provide a new mechanism to alter the magnetic configuration in magnetic heterostructures, a feat previously only achieved by an...

Elastic Modulus of Amorphous Polymer Thin Films: Relationship to the Glass Transition Temperature

August 24, 2009

Author(s)

Jessica M. Torres, Christopher Stafford, Bryan D. Vogt

Understanding the mechanical properties of polymers at the nanoscale is critical in numerous emerging applications. While it has been widely shown that the Tg...

Evaluation of Dental Composite Shrinkage and Leakage using X-Ray Microcomputed Tomography

August 24, 2009

Author(s)

Diana N. Zeiger, Jirun Sun, Gary E. Schumacher, Sheng Lin-Gibson

Polymerization shrinkage of dental composites results in leakage and may lead to secondary caries and restoration failure. This study tested the hypothesis that...

Scaling Factors and Uncertainties for ab Initio Anharmonic Vibrational Frequencies

August 21, 2009

Author(s)

Russell D. Johnson III, Karl K. Irikura, Raghu N. Kacker, Ruediger Kessel

To predict the vibrational spectra of molecules, ab initio calculations are often used to compute harmonic frequencies, which are usually scaled by empirical...

A moving window correlation method to reduce the distortion of SPM images

August 20, 2009

Author(s)

Wei Chu, Joseph Fu, Ronald G. Dixson, Ndubuisi Orji, Theodore Vorburger

Many scanning probe microscopes (SPMs), such as the scanning tunneling microscope (STM) and atomic force microscope (AFM), use piezoelectric actuators operating...

Poly(ethylene glycol)s 2000-8000 in Water May be Planar: A Small-Angle Neutron Scattering (SANS) Structure Study

August 19, 2009

Author(s)

Kenneth A. Rubinson, Susan Krueger

The low-resolution three-dimensional structure of purified beef heart mitochondrial cytochrome c oxidase in asolectin unilameler liposomes has been measured by...

An Other-Race Effect for Face Recognition Algorithms

August 19, 2009

Author(s)

P J. Phillips, Alice J. O'Toole, Fang Jiang, Abhijit Narvekar, Julianne Ayadd

Psychological research indicates that humans recognize faces of their own race more accurately than faces of other races. This "other-race effect" occurs for...

Glassy Carbon as an Absolute Intensity Calibration Standard for Small Angle Scattering

August 19, 2009

Author(s)

Andrew J. Allen, Jan Ilavsky, Fan Zhang, Gabrielle G. Long, Pete R. Jemian

Absolute calibration of small-angle scattering (SAS) intensity data (in units of differential cross-section per unit sample volume per unit solid angle) is...

High-Fidelity Quantum Control Using 9Be+ Ion Crystals in a Penning Trap

August 19, 2009

Author(s)

Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger

We provide an introduction to the use of ion crystals in a Penning trap for experiments in quantum information. Macroscopic Penning traps allow for the...

Use of BANG3-Pro-1 gel Dosimetry to Measure the 3D Dose Distribution of a Sr90/Y90 Intravascular Brachytherapy Seed.

August 18, 2009

Author(s)

Guerda Massillon, Ronaldo Minniti, Michael G. Mitch, M.J. Maryanski, Christopher G. Soares

Absorbed dose distributions in 3D imparted by a single Novoste 5F 90Sr/90Y beta particle source of the type formerly used for intravascular brachytherapy were...

Coupled magnetic and ferroelectric hysteresis in multiferroic Ni ^ d3 ^ V ^ d2 ^ O ^ d8 ^

August 18, 2009

Author(s)

I. Cabrera, M. Kenzelmann, Wangchun Chen, Ross Erwin, Thomas R. Gentile, Juscelino Leao, Jeffrey W. Lynn, N. Rogado, R. J. Cava, C. Broholm, G. Lawes, Ying Chen

Electric control of spin chirality in a magnetically frustrated multiferroic is demonstrated through polarized magnetic neutron diffraction. Cooling to the...

Temperature analysis of low-expansion Fabry-Perot cavities

August 17, 2009

Author(s)

Richard W. Fox

A model of the temperature response of low-expansion glass Fabry-Perot cavities that includes structural distortion at the contacted mirrors compares well to...

Fiber-coupled semiconductor waveguides as an efficient optical interface to a single quantum dipole

August 15, 2009

Author(s)

Marcelo I. Davanco, Kartik A. Srinivasan

We theoretically investigate the interaction of a single quantum dipole with the modes of a fiber-coupled semiconductor waveguide. Through a combination of...

Conversion of laser optical rotation noise in cesium vapor

August 15, 2009

Author(s)

Ricardo Jimenez Martinez, Svenja A. Knappe, William C. Griffith, John E. Kitching

We have studied the noise in the optical rotation of a linearly polarized laser beam transmitted through a spin-polarized 133Cs vapor as a function of its...

Applications of artificial neural networks in optical performance monitoring

August 15, 2009

Author(s)

Jeffrey A. Jargon, Xiaoxia Wu, Ronald Skoog, Loukas Paraschis, Alan Willner

Applications using artificial neural networks (ANNs) for optical performance monitoring (OPM) are proposed and demonstrated. Simultaneous identification of...

Dynamics of coupled ultraslow optical solitons in a coherent four-state double-¿ system

August 15, 2009

Author(s)

Lu Deng, Guoxiang Huang

We present a systematical investigation, both analytical and numerical, on the dynamics of two nearly lossless and distortion-free weak nonlinear optical pulses...

Modeling the Effects of Outdoor Gasoline Powered Generator Use on Indoor Carbon Monoxide Exposures

August 14, 2009

Author(s)

Steven J. Emmerich, Liangzhu Wang

The U.S. Centers for Disease Control and Prevention (CDC) has reported that up to half of non-fatal CO poisoning incidents during the hurricane seasons in 2004...

Non-Hydrolytic Synthesis and Electronic Structure of Ligand-Capped CeO2- and CeOCl Nanocrystals

August 13, 2009

Author(s)

Daniel A. Fischer, S. Depner, K. Kort, Cherno Jaye, Sarbajit Banerjee

A novel and versatile non-hydrolytic approach is developed for the synthesis of ligand-passivated CeO2-δ and CeOCl nanocrystals soluble in non-polar organic...

Broadband lumped-element integrated n-way power dividers for programmable Josephson voltage standards

August 12, 2009

Author(s)

Mike Elsbury, Paul D. Dresselhaus, Norman F. Bergren, Charles J. Burroughs, Samuel P. Benz, Zoya Popovic

This paper presents a monolithically integrated broadband lumped-element Wilkinson power divider centered at 20 GHz, which was designed and fabricated to...

Design and Experimental Verification of a 3D Magnetic EZ Antenna at 300 MHz

August 11, 2009

Author(s)

Christopher L. Holloway, Richard Ziolkowski, Chia-Ching Lin, J. A. Nielsen, M. H. Tanielian

Several variations of a 300 MHz version of the electrically small coax-fed three-dimensional (3D) magnetic EZ antenna were designed and tested. The final design...

Factors that Influence Algorithm Performance

August 11, 2009

Author(s)

P J. Phillips, J. R. Beveridge, Geof H. Givens, Bruce A. Draper

A statistical study is presented quantifying the effects of covariates such as gender, age, expression, image resolution and focus on three face recognition...

Formation of Silicon-Based Molecular Electronic Structures Using Flip-chip Lamination

August 11, 2009

Author(s)

Mariona Coll Bau, Lauren H. Miller, Lee J. Richter, Daniel R. Hines, Curt A. Richter, Christina A. Hacker

The use of organic molecules to impart electrical surface properties has been a subject of intense research not only from a fundamental perspective but for many...

Lattice Interferometer for Ultra-Cold Atoms

August 11, 2009

Author(s)

Mikkel Andersen, Tycho Sleator

We demonstrate an atomic interferometer based on ultra-cold atoms released from an optical lattice. This technique yields a large improvement in signal to noise...

Diffusion Under Temperature Gradient: A Phase-field Model Study

August 11, 2009

Author(s)

Rashmi R. Mohanty, Jonathan E. Guyer, Yong Ho Sohn

A diffuse interface model was devised and employed to investigate the effect of thermotransport (a.k.a., thermomigration) process in single-phase and multi...

Reference measurements of Hydrogen's Dielectric Permittivity

August 10, 2009

Author(s)

James W. Schmidt, Michael R. Moldover, Eric F. May

We used a quasi-spherical cavity resonator to measure the relative dielectric permittivity ε r of H 2 at frequencies from 2.4 GHz to 7.3 GHz, at pressures up to...

Combinatorial Software Testing

August 7, 2009

Author(s)

David R. Kuhn, Raghu N. Kacker, Yu Lei, Justin Hunter

Developers of large data-intensive software often notice an interesting - though not surprising - phenomenon: when usage of an application jumps dramatically...

A Spin-1/2 Optical Lattice Clock

August 7, 2009

Author(s)

Nathan D. Lemke, Andrew D. Ludlow, Zeb Barber, Tara M. Fortier, Scott A. Diddams, Yanyi Jiang, Steven R. Jefferts, Thomas P. Heavner, Thomas E. Parker, Christopher W. Oates

We experimentally investigate an optical clock based on 171Yb (I = 1/2) atoms confined in an optical lattice. We have evaluated all known frequency shifts to...

Development of a Seebeck Coefficient Standard Reference Material

August 7, 2009

Author(s)

Nathan Lowhorn, Winnie Wong-Ng, John Lu, Evan L. Thomas, Makoto Otani, Martin L. Green, Neil Dilley, Jeffrey Sharp, Thanh N. Tran

We have successfully developed a Seebeck coefficient Standard Reference Material (SRM ), Bi2Te3, that is crucial for interlaboratory data comparison and for...

Volatility of Aprotic Ionic Liquids - A Review

August 7, 2009

Author(s)

Jose M.S.S. Esperanca, Jose N. Canongia Lopes, Mohd Tariq, Luis M.N.B.F. Santos, Joe W. Magee, Luis P. Rebelo

A review of research on the volatility of aprotic ionic liquids is presented. This topic is limited to aprotic liquids, since measurements have led to a...

Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene

August 6, 2009

Author(s)

Hongki Min, Allan H. MacDonald

We predict that the optical conductivity of normal graphene multilayers is close to ς uni=(π/2) e 2/h per layer over a broad range of frequencies. The origin of...

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