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Journals

Direct and indirect measurements and modeling of methane emissions in Indianapolis, IN

October 13, 2014

Author(s)

Kuldeep R. Prasad

Abstract Based on recent EPA Greenhouse Gas Inventories, releases of methane (CH4) from the natural gas supply chain in the United States account for...

Nonparametric Estimates of Drift and Diffusion Profiles via Fokker-Planck Algebra

October 13, 2014

Author(s)

Steven P. Lund, Michael W. Halter, Joseph B. Hubbard

Diffusion processes superimposed upon deterministic motion play a key role in understanding and controlling the transport of matter, energy, momentum, and even...

Exceptional Superionic Conductivity in Disordered Sodium Decahydro-closo-decaborate

October 13, 2014

Author(s)

Terrence J. Udovic, Motoaki Matsuo, Wan Si NMN Tang, Hui Wu, Vitalie Stavila, Alexei V. Soloninin, Roman V. Skoryunov, Olga A. Babanova, Alexander Skripov, John J. Rush, Atsushi Unemoto, Hitoshi Takamura, Shin-Ichi Orimo

Na 2B 10h 10 undergoes a transition from an ordered monoclinic phase to a disordered, face-centered-cubic phase near 370 K with the emergence of a vacancy-rich...

Self-Assembly of the Triblock Copolymer 17R4 Poly(propylene oxide)₁₄ - Poly(ethylene oxide)₂₄ - Poly(propylene oxide)₁₄ in D₂O

October 13, 2014

Author(s)

Bryna C. Kumi, Boualem Hammouda, Sandra C. Greer

The triblock copolymer Reverse Pluronic 17R4 consists of tow end blocks of poly(propylene oxide)(PPO) with a middle block of poly(ethylene oxide) (PEO): PPO 14...

Persistent Fe Moments in the Normal-State Collapsed-Tetragonal Phase of the Pressure-induced Superconductor Ca_0.67Sr_0.33Fe₂As₂

October 13, 2014

Author(s)

J.R. Jeffries, Nicholas Butch, M.J. Lipp, J.A. Bradley, K. Kirshenbaum, Shanta Saha, J. Paglione, C. Kenny-Benson, Y. Xiao, P. Chow, W. J. Evans

Using non-resonant Fe Κ}β x-ray emission spectroscopy, we reveal that Sr-doping of CaFe 2As 2 decouples the Fe moment from the volume collapse transition...

Insights into carbon nanotube nucleation: Cap formation governed by catalyst interfacial step flow

October 13, 2014

Author(s)

Rahul Rao, Renu Sharma, Frank Abild-Pedersen, Jens Norskov, Avetik R. Harutyunyan

In order to accommodate an increasing demand for carbon nanotubes (CNTs) with desirable characteristics one has to understand the origin of helicity of their...

Synthesis, Thermal Behaviors and Dehydrogenation Kinetics Studies on Lithiated Ethylenediamine

October 13, 2014

Author(s)

Juner Chen, Guotao Wu, Zhitao Xiong, Hui Wu, Yong Shen Chua, Wei Zhou, Bin Liu, Xiaohua Ju, Ping Chen

The lithiation of ethylenediamine by LiH is a step-wise process forming the partially lithiated intermidiates LiN(H)CH 2CH 2NH 2 and [LiN(H)CH 2CH 2NH 2][LiN(H...

Surface Analysis and Materials Characterization for the Study of the Ceramic Tiles HRSI from the Space Shuttle Thermal Protective Systems

October 12, 2014

Author(s)

Hanna Szczepanowska, Thomas Brian Renegar

The orbital thermal management systems fall into two categories, ablative or reusable. The first type was successfully applied on the Apollo missions, the...

A Microliter Capillary Rheometer for Characterization of Protein Solutions

October 10, 2014

Author(s)

Steven D Hudson, Prasad S. Sarangapani, Kalman D. Migler, Jai A. Pathak

Rheometry is an important characterization tool for therapeutic protein solutions because it determines syringeability and relates indirectly to solution...

Ultrafast THz photoconductivity of photovoltaic polymer-fullerene blends: a comparative study correlated with photovoltaic device performance

October 10, 2014

Author(s)

Edwin J. Heilweil, Jin Zuanming, Dominik Gehrig, Clare Dyer-Smith, Frederic Laquai, Mischa Bonn, Dmitry Turchinovich

Ultrafast photo-induced carrier dynamics in prototypical low band-gap polymer:fullerene photovoltaic blend films PTB7:PC70BM and P3HT:PC70BM is investigated...

Dynamic customization, validation and integration of product data models using semantic web tools

October 10, 2014

Author(s)

Allison Barnard Feeney, Sylvere Krima, sebti foufou

Product Lifecycle Management (PLM) requires robust solutions for representing and integrating product data models. Product data models enable information...

Neutron Scattering Studies of the Ferroelectric Distortion and Spin Dynamics in the Type-1 Multiferroic Perovskite Sr_0.56Ba_0.44MnO₃

October 9, 2014

Author(s)

Daniel K. Pratt, Jeffrey W. Lynn, James Mais, Omar Chmaissem, Dennis E. Brown, Stanislaw Kolesnik, Bogdan Dabrowski

The magnetic order, spin dynamics, and crystal structure of the multiferroic Sr 0.56Ba 0.44MnO 3 have been investigated using neutron and x-ray scattering...

Kitaev chains with long-range interactions

October 9, 2014

Author(s)

Davide Vodola, Luca Lepori, Elisa Ercolessi, Alexey Gorshkov, Guido Pupillo

We propose and analyze a generalization of the Kitaev chain for fermions with long-range p-wave pairing, which decays with distance as a power-law with exponent...

On Statistical Modeling and Forecasting of Energy Usage in Smart Grid

October 8, 2014

Author(s)

Wei Yu, Dou An, David W. Griffith, Qingyu Yang, Guobin Xu

Developing effective energy resource management in the smart grid is challenging because the entities in both the demand and supply sides experience various...

Optimizing Passive Quantum Clocks

October 8, 2014

Author(s)

Michael J. Mullan, Emanuel Knill

We describe protocols for passive atomic clocks based onquantum interrogation of the atoms. Unlike previous techniques, our protocols are adaptive and take...

Influence of Chemical Straightening on the Stability of Drugs of Abuse in Hair

October 8, 2014

Author(s)

Jeanita Pritchett, Karen W. Phinney

Chemical straightening, also known as a relaxer, is ubiquitously used among African American women to obtain straighter hair compared with their natural tresses...

Collapse and revivals for systems of short-range phase coherence

October 7, 2014

Author(s)

Khan W. Mahmud, Lei Jiang, Philip R. Johnson, Eite Tiesinga

We predict the existence of novel collapse and revival oscillations that are a distinctive signature of the short-range off-diagonal coherence associated with...

Modeling of an air-backed diaphragm in dynamic pressure sensors: effects of the air cavity

October 7, 2014

Author(s)

Haijun H. Liu, Douglas A. Olson, Miao Yu

As the key structure of most dynamic pressure sensors, a diaphragm backed by an air cavity plays a critical role in the determination of sensor performance. In...

Phase-Sensitive Detection of Spin Pumping via the ac Inverse Spin Hall Effect

October 6, 2014

Author(s)

Thomas J. Silva, Justin M. Shaw, Hans T. Nembach, Mathias A. Weiler

Sources of pure spin currents are a fundamental building block of spintronic devices. In ferromagnet/normal metal heterostructures, spin currents are generated...

Comb-calibrated laser ranging for three-dimensional surface profiling with micrometer-level precision at a distance

October 6, 2014

Author(s)

Esther Baumann, Fabrizio R. Giorgetta, Jean-Daniel Deschenes, William C. Swann, Ian R. Coddington, Nathan R. Newbury

Non-contact surface mapping at a distance is interesting in diverse applications including industrial metrology, manufacturing, forensics, and artifact...

A Homogenization Technique for Obtaining Generalized Sheet Transition Conditions for an Arbitrarily Shaped Coated Wire Grating

October 6, 2014

Author(s)

Christopher L. Holloway, Edward Kuester

Using a multiple-scale homogenization method, we derive generalized sheet transition conditions (GSTCs) for an arbitrarily shaped coated wire grating. The...

Economic Impact of Improved Service-Life Prediction for Seams in Low-Slope EPDM Roofing

October 5, 2014

Author(s)

Douglas S. Thomas

In the early part of the 1970's built-up-roofing dominated the U.S. membrane roofing industry. It was estimated that 10 to 15 percent of these roofs failed, but...

The Economics of Residential Fire Sprinklers and the Potential Impact of Recent Code Changes

October 5, 2014

Author(s)

David T. Butry

Residential fire sprinklers reduce the likelihood of room flashover, improving conditions for occupant egress, and thereby reduce the number of fatalities...

Cryogenic Design and Performance of an Apparatus for Magnetically Trapping Ultracold Neutrons

October 5, 2014

Author(s)

Hans Mumm

The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to...

Electromagnetic scattering from randomly-centered parallel single-walled carbon nanotubes embedded in a dielectric slab

October 2, 2014

Author(s)

Edward Garboczi, ahmed hassan

An analytical full wave model of parallel, randomly dispersed carbon nanotubes (CNTs) embedded in a dielectric slab was developed to calculate the...

From Membrane-in-the-Middle to Mirror-in-the-Middle with a High-Reflectivity Sub-Wavelength Grating

October 2, 2014

Author(s)

Corey A. Stambaugh, Haitan Xu, Utku Kemiktarak, Jacob M. Taylor, John R. Lawall

We demonstrate a ``membrane-in-the-middle'' optomechanical system using a silicon nitride membrane patterned as a subwavelength grating. The grating has a...

Origin of Surface Canting Within Fe₃O₄ Nanoparticles

October 2, 2014

Author(s)

Kathryn L. Krycka, Julie A. Borchers, R. A. Booth, Y. Ijiri, K. Hasz, J. J. Rhyne, S. A. Majetich

The nature of near-surface spin canting within Fe 3O 4 nanoparticles is highly debated. Here we develop a neutron scattering asymmetry analysis which quantifies...

Evaluation of the Impact of Peak Description on the Quantitative Capabilities of Comprehensive Two-Dimensional Liquid Chromatography

October 2, 2014

Author(s)

Benjamin Place, Mallory J. Morris, Melissa Phillips, Lane Sander, Catherine Rimmer

Comprehensive, two-dimensional liquid chromatography (LCxLC) is a powerful technique for the separation of complex mixtures. Most studies using LCxLC are...

The Solution Structure of Full-length Dodecameric MCM by SANS and Molecular Modeling

October 1, 2014

Author(s)

Susan Krueger, Jae-Ho Shin, Joseph E. Curtis, Kenneth A. Rubinson, Zvi Kelman

Universal scaling law for the flow of non-Newtonian colloidal suspension

October 1, 2014

Author(s)

Nicos Martys, William L. George, Maxime Liard, Pascal Hebraud, Didier Lootens

It has been observed that flow curves (viscosity vs shear-rate) of spherical non-colloidal particles suspended in a non-Newtonian fluid matrix can be rescaled...

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