Journals

Neutron Transmission of Single-Crystal Magnesium Fluoride

November 27, 2008

Author(s)

John Barker, David F. Mildner, Jose Rodriguez Rivera, P. Thiyagarajan

The neutron attenuation through single-crystal magnesium fluoride has been measured as a function of wavelength at both room temperature and 77 K. These data...

Addressing Y-Chromosome Short Tandem Repeat(Y-STR) Allele Nomenclature

November 25, 2008

Author(s)

John M. Butler, Margaret C. Kline, Amy E. Decker

Currently 120 different Y-chromosome short tandem repeat (Y-STR) markers are used by various genetic genealogy testing laboratories. In some cases, different...

Pressure-induced volume-collapsed tetragonal phase of CaFe 2 As 2 as seen via neutron scattering

November 24, 2008

Author(s)

A. Kreyssig, Mark Green, Y. Lee, G. D. Samolyuk, Pawel Zajdel, Jeffrey Lynn, S. L. Bud'ko, M. S. Torikachvili, N. Ni, S. Nandi, Juscelino Leao, Sarah Poulton, D. N. Argyriou, B. N. Harmon, R. J. McQueeny, P. C. Canfield, A. I. Goldman

Recent investigations of the superconducting iron-arsenide families have highlighted the role of pressure, be it chemical or mechanical, in fostering...

Measuring intensity correlations with a two-element superconducting nanowire single-photon detector

November 24, 2008

Author(s)

Eric Dauler, Martin Stevens, Burm Baek, Richard J. Molnar, Scott A. Hamilton, Richard Mirin, Sae Woo Nam, Karl Berggren

Second-order intensity correlation measurements were made using a two-element superconducting nanowire single photon detector (SNSPD) without the need for an...

Designing artificial cells to harness the biological ion gradient

November 23, 2008

Author(s)

Jian Xu, David A. LaVan

Cell membranes contain numerous natural nanoscale conductors, i.e. ion channels and ion pumps1-4, that work in concert to form transmembrane or transcellular...

Terahertz spectroscopy of aqueous L-Proline in reverse micelles

November 21, 2008

Author(s)

Catherine C. Cooksey, Edwin J. Heilweil, Benjamin Greer

A new method for obtaining room temperature terahertz (THz) absorption spectra of aqueous-phase biomolecules in the frequency range 1 THz to 21 THz (35 cm-1 to...

Josephson phase qubit circuit for the evaluation of advanced tunnel barrier materials

November 21, 2008

Author(s)

Jeffrey S. Kline, Haohua Wang, Seongshik Oh, John M. Martinis, David P. Pappas

We have found that crystalline Josephson junctions have critical current density control problems which decrease circuit yield. We present a qubit circuit...

Using Reverberation Chambers to Determine the Shielding Effectiveness of Physically Small, Electrically Large Enclosures/Cavities

November 20, 2008

Author(s)

Christopher L. Holloway, David A. Hill, Marco Sandroni, John M. Ladbury, Jason B. Coder, Galen H. Koepke, Andrew C. Marvin

With the proliferation of small electric devices in recent years, along with various other applications, there is a growing need to test and determine the...

Controlled Transport of Magnetic Particles Using Soft Magnetic Patterns

November 20, 2008

Author(s)

Richard Conroy, Gary Zabow, John M. Moreland, Alan P. Koretsky

Inspired by magnetic bubble memory technology, we demonstrate the temporal and spatial manipulation of superparamagnetic beads guided by soft magnetic patterns...

Pair correlation functions of simple solutes in a Lennard-Jones solvent

November 20, 2008

Author(s)

Yehuda A. Ben Naim, Vincent K. Shen

We have calculated the pair correlation functions for several binary mixtures composed of simple solutes in a Lennard-Jones solvent. In particular, we have...

Raman Spectroscopic Determination of Electron Concentration in n-Type GaSb

November 19, 2008

Author(s)

James E. Maslar, Wilbur S. Hurst, C Wang

Phonon-plasmon coupled mode Raman spectra of n-type GaSb were measured at room temperature as a function of electron concentration. These spectra were obtained...

Nanoscale thermal mechanical probe determination of softening transitions in thin polymer films

November 19, 2008

Author(s)

Jing N. Zhou, Jack F. Douglas, Alamgir Karim, Chad R. Snyder, Christopher Soles, Brian Berry

We report a quantitative study of softening behavior of glassy polystyrene (PS) films at the 100 nm length scales using nano-thermomechanometry (nano-TM), an...

Disordered Nanoparticle Interfaces for Defect-Tolerant Self-Assembly

November 17, 2008

Author(s)

Kevin G. Yager, Brian Berry, Kirt A. Page, Derek L. Patton, Alamgir Karim, Eric J. Amis

Self-assembly is a promising route for controlling the nanoscale structure and material properties of coatings, yet it remains difficult to control the...

Soluble Amyloid beta-Oligomers Affect Dielectric Membrane Properties by Bilayer Insertion and Domain Formation: Implications for Cell Toxicity

November 15, 2008

Author(s)

Gintaras Valincius, Frank Heinrich, R Budvytye, David J. Vanderah, Duncan J. McGillivray, Y Sokolov, J E. Hall, Mathias Losche

Cancellation of Vibration-Induced Phase Noise in Optical Fibers

November 15, 2008

Author(s)

Archita Hati, Craig W. Nelson, Jennifer A. Taylor, David A. Howe

Vibration causes mechanical distortions in fiber-optic transmission lines that induce phase fluctuations. A scheme is described which enables electronic...

Unusual Heavy-mass Nearly Ferromagnetic State with a Surprisingly Large Wilson Ratio in Double Layered Ruthenates (Sr_1-xCa_x)₃Ru₂O₇

November 14, 2008

Author(s)

Z Qu, L Spinu, H Q. Yuan, V Dobrosavljevic, Wei Bao, Jeffrey Lynn, M Nicklas, J Peng, T J. Liu, F Fobes, E Flesch, Z Q. Mao

We report a very unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio Rw (e.g., Rw 700 for x = 0.2) in double layered ruthenates...

MEASUREMENT OF COMPLEX CONDUCTIVITY IN CARBON NANOTUBE POLYMER COMPOSITES UNDER MECHANICAL SHEAR

November 14, 2008

Author(s)

Jan Obrzut, Jack F. Douglas

We measured the complex conductivity of carbon nanotube-polypropylene composites under mechanical shear conditions. In order to determine how flow alters the...

Preparation and Characterization of Patchy Particles

November 14, 2008

Author(s)

Thuy Chastek, Steven D. Hudson, Vincent A. Hackley

The self-assembled organization of partilces depends on the symmetry of their interactions, and strides are being made in producing nanoaparticles of controlled...

Timely Effective Handover Mechanism in Heterogeneous Wireless Networks

November 13, 2008

Author(s)

Sang J. Yoo, David E. Cypher, Nada T. Golmie

Next-generation wireless networks should be able to coordinate and integrate different communication systems. It has been a challenging problem to support a...

Mapping the Elastic Properties of Granular Au Films by Contact Resonance Atomic Force Microscopy

November 13, 2008

Author(s)

Gheorghe Stan, Robert F. Cook

Endowed with nanoscale spatial resolution, contact resonance atomic force microscopy (CR-AFM) provides extremely localized elastic property measurements. We...

Testing Randomness via Aperiodic Words

November 11, 2008

Author(s)

Andrew L. Rukhin, Z Volkovich

The properties of statistical procedures based on numbers of occurrences of aperiodic patterns in a random text are summarized. The asymptotic formulas for the...

Self-Assembly in a Polymer Matrix and its Impact on Phase Separation

November 11, 2008

Author(s)

Jack F. Douglas, Jacek Dudowicz, Karl Freed

Molecular self-assembly often occurs in the presence of long chain polymers, and we develop a theory to describe the competition between self-assembly and phase...

Rheological Properties of Cement Pastes: A Discussion of Structure Formation and Mechanical Property Development

November 11, 2008

Author(s)

Gaurav Sant, Chiara C. Ferraris, Jason Weiss

The objective of this paper is to examine the evolution of rheological properties (e.g. yield stress) and to evaluate the use of these properties as a way to...

A Low Cost Fiducial Reference for Computed Tomography

November 11, 2008

Author(s)

Zachary H. Levine, Steven Grantham, Daniel S. Sawyer, Anthony P. Reeves, David F. Yankelevitz

Rationale and Objectives. To detect the growth in lesions, it is necessary to ensure that the apparent changes in size are above the noise floor of the system...

An Evaluation of Description Logic for the Development of Product Models

November 10, 2008

Author(s)

Xenia Fiorentini, Sudarsan Rachuri, Hyo Won Suh, Jae H. Lee, Ram D. Sriram

The languages and logical formalisms developed by information scientists and logicians concentrate on the theory of languages and logical theorem proving. These...

The Infrared Spectroscopy and Photochemistry of NO₃ Trapped in Solid Neon

November 10, 2008

Author(s)

Marilyn E. Jacox, Warren E. Thompson

NO3 can be stabilized in solid neon either by codeposition at 4.3 K of a Ne:O2 mixture with a Ne:NO mixture that had been passed through a microwave discharge...

A Semantic-Mediation Architecture for Interoperable Supply-Chain Applications

November 10, 2008

Author(s)

Marko Vujasinovic, Nenad Ivezic, Boonserm Kulvatunyou, Edward J. Barkmeyer Jr., Michele Missikoff, Francesco Taglino, Zuran Marjanovic, Igor Miletic

This paper presents a semantic-mediation architecture that enables standards-based interoperability between heterogeneous supply-chain applications. The...

Long-distance entanglement-based quantum key distribution over optical fiber

November 10, 2008

Author(s)

Toshimori Honjo, Sae Woo Nam, Hiroki Takesue, Qiang Zhang, H. Kamada, Y. Nishida, O. Tadanaga, M. Asobe, Burm Baek, Robert Hadfield, Shigehito Miki, Mikio Fujiwara, Masahide Sasaki, Z. Wang, K. Inoue, Yoshihisa Yamamoto

We report the first entanglement-based quantum key distribution (QKD) experiment over a 100-km optical fiber. We used superconducting single photon detectors...

Workshop on Measurement Needs for Local-Structure Determination in Inorganic Materials

November 8, 2008

Author(s)

Igor Levin, Terrell A. Vanderah

The functional responses (e.g. dielectric, magnetic, catalytic, etc) of many industrially-relevant materials are controlled by their local structure a term that...

Frequency Shifts in an Optical Lattice Clock Due to Magnetic Dipole and Electric-quadrupole Transitions

November 7, 2008

Author(s)

A. V. Taichenachev, V. I. Yudin, V.D. Ovsiannikov, V.G. Pal'chikov, Christopher W. Oates

We report an hitherto undiscovered frequency shift for forbidden J =0 - J =0 clock transitions excited in atoms confined to an optical lattice. These shifts...