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Displaying 22651 - 22675 of 74079

Spin transport in memristive devices

January 26, 2012
Author(s)
Hyuk-Jae Jang, Oleg A. Kirillov, Oana Jurchescu, Curt A. Richter
We report on electron spin transport through electrochemically precipitated copper filaments formed in TaOX memristive devices consisting of Co(60nm)/TaOX(16nm)/Cu(5nm)/Py(60nm) with crossbar-type electrode geometry.The devices show memristive behavior

Distinguishing the Monomer to Cluster Phase Transition in Concentrated Lysozyme Solutions by Studying the Temperature Dependence of the Short-Time Dynamics

January 25, 2012
Author(s)
Peter Falus, Lionel Porcar, Emiliano Fratini, Wei-Ren Chen, Antonio Faraone, Kunlun Hong, Piero Baglioni, Yun Liu
Recently experiments that combine both small angle neutron scattering (SANS) and Neutron Spin Echo (NSE) have demonstrated that dynamic clusters can form in concentrated lysozyme solutions when a right combination of a short-ranged attraction and long

Dynamics of Hydration Water in Portland Cement with and without a Superplasticizer Studied by High-Resolution Quasi-Elastic Neutron Scattering

January 25, 2012
Author(s)
Hua Li, Emiliano Fratini, Francesca Ridi, Francesco Bausi, Piero Baglioni, Madhu Sudan Tyagi, Sow-Hsin Chen
The influence of a new comb-shaped polycarboxylate-based superplasticizer (CSSP) on the hydration kinetics and transport properties of aged cement pastes has been investigated by high-resolution Quasi-Elastic Neutron Scattering (QENS) and low temperature

EFFECT OF ETHANOL FUEL AND MICROBIOLOGICALLY INFLUENCED CORROSION ON THE FATIGUE CRACK GROWTH BEHAVIOR OF PIPELINE STEELS

January 25, 2012
Author(s)
Jeffrey W. Sowards, Timothy S. Weeks, Joseph D. McColskey, James R. Fekete, Jain Luke, Charles H. Williamson
Ethanol fuel production and consumption is expected to increase significantly in the near future. Existing pipeline infrastructure could be repurposed to transport ethanol and other biofuels from production sources, such as those located in the Midwest, to

Chiral Index Dependence of the G+ and G- RamanModes in Semiconducting Carbon Nanotubes

January 24, 2012
Author(s)
Ming Zheng, Xiaomin X. Tu, Hagen Telg, Stephen K. Doorn, Juan Duque
Raman spectroscopy on the radial breathing mode is a common tool to determine the diameter d or chiral indices (n;m) of single walled carbon nanotubes. In this work we presentan alternative technique to determine d and (n;m) based on the high-energy G mode

Information Technology Laboratory Brochure

January 24, 2012
Author(s)
Elizabeth B. Lennon
This brochure describes the Information Technology Laboratory (ITL) at the National Institute of Standards and Technology, its mission, highlights, and research programs.

Efficiency of quasiparticle evacuation in superconducting devices

January 23, 2012
Author(s)
Sukumar Rajauria, L. Pascal, P. Gandit, F. Hekking, B. Pannetier, H. Courtois
We have studied the di®usion of excess quasiparticles in a current-biased superconductor strip in proximity to a metallic trap junction. In particular, we have measured accurately the superconductor temperature at a near-gap injection voltage. By analyzing

Recommendation for the Triple Data Encryption Algorithm (TDEA) Block Cipher

January 23, 2012
Author(s)
William C. Barker, Elaine B. Barker
This publication specifies the Triple Data Encryption Algorithm (TDEA), including its primary component cryptographic engine, the Data Encryption Algorithm (DEA). When implemented in an SP 800-38-series-compliant mode of operation and in a FIPS 140-2

Standards for the Optical Detection of Protein Particulates

January 23, 2012
Author(s)
Dean C. Ripple, Michael J. Carrier, Joshua R. Wayment
Particulates in protein therapeutics, composed of agglomerated protein monomers, may cause an immunogenic response in patients. Consequently, industry and the FDA desire more accurate methods for counting and characterizing particulates. Unlike likely

The Effects of Folding on High Strength Fibers Used in Soft Body Armor

January 23, 2012
Author(s)
Haruki Kobayashi, Walter G. McDonough, Joy Dunkers, Jae H. Kim, Hae-Jeong Lee, Scott Wight, Amanda L. Forster, Kirk D. Rice, Gale A. Holmes
Poly (p-phenylene benzobisoxazole) (PBO) fibers have been used in soft body armor (SBA) because of their high mechanical strength. However, there was an unexpected failure of a first responder's SBA which was composed of PBO fiber that was in service for

Ultrafast Demagnetization Measurements using Extreme Ultraviolet Light: Comparison of Electronic and Magnetic Contributions

January 23, 2012
Author(s)
Thomas J. Silva, Justin M. Shaw, Hans T. Nembach, Margaret M. Murnane, Henry C. Kapteyn, Chan La-O-Vorakiat, Stefan Mathias, Emrah Turgut, Teale A. Carson, Martin Aeschlimann, Claus M. Schneider
Ultrashort pulses of extreme ultraviolet light from high-harmonic generation are a new tool for probing coupled charge, spin, and phonon dynamics with element specificity, attosecond pump-probe synchronization, and time resolution of a few-femtoseconds in
Displaying 22651 - 22675 of 74079