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Search Publications

NIST Authors in Bold

Displaying 14926 - 14950 of 73697

Effect of Charge on the Mechanical Properties of Surfactant Bilayers

November 23, 2016
Author(s)
Robert David Bradbury, Michihiro Nagao
The viscoelastic properties of surfactant bilayers have been measured over a range of surface charge densities, for a system with a low ionic strength, using small-angle neutron scattering and neutron spin echo (NSE) spectroscopy. An increase in the

Irreversible Desiccation Shrinkage of Cement Paste Caused by Cement Grain Dissolution

November 23, 2016
Author(s)
Xiaodan Li, Zachary Grasley, Jeffrey W. Bullard, Edward Garboczi
When cementitious materials are dried, internal stresses are generated that lead to desiccation shrinkage. A portion of this shrinkage is irreversible. Based on previous research indicating that dissolution of cement grains while a cementitious composite

Synthetic gauge potentials for ultracold neutral atoms

November 23, 2016
Author(s)
Ian B. Spielman, Yu-Ju Lin
Synthetic gauge fields for ultracold neutral atoms—engineered using the interaction between laser fields and the atoms' internal 'spin' degrees of freedom—provide promising techniques for generating the large (synthetic) magnetic fields required to reach

Vortex nucleation in a BoseEinstein condensate: from the inside out

November 23, 2016
Author(s)
Ian B. Spielman, Daniel Campbell, Ryan Price, Andika Putra, Dimitrius Trypogeorgos, Ana Vald?Curiel
We observed a new mechanism for vortex nucleation in Bose–Einstein condensates (BECs) subject to synthetic magnetic fields. We made use of a strong synthetic magnetic field initially localized between a pair of merging BECs to rapidly create vortices in

CODATA Recommended Values of the Fundamental Physical Constants: 2014

November 22, 2016
Author(s)
Peter J. Mohr, David B. Newell, Barry N. Taylor
This paper gives the 2014 self-consistent set of values of the constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA). These values are based on a least-squares adjustment that

Complex Arrangement of Orthogonal Columns via a Supramolecular Orientational Memory Effect

November 22, 2016
Author(s)
Mihai Peterca, Mohammad Imam, Steven Hudson, Benjamin Partridge, D Sahoo, Paul A. Heiney, M L. Klein, Virgil Percec
Memory effects, including shape, chiral and liquid crystalline, enabled macroscopic materials with novel functions. However, the generation of complex supramolecular nanosystems via memory effects was not investigated. Here we report a cyclotriveratrylene

Crowdsourcing to Develop Life-Saving Technologies

November 22, 2016
Author(s)
Tammi M. Marcoullier
The future of emergency services and saving more lives in disasters hinges on the success of technology that will be developed through crowdsourcing. Interoperability among first responder devices, Immersive Reality with VR/AR, and down-to-the-meter

Exploring the Next Generation of Access Control Methodologies

November 22, 2016
Author(s)
David Ferraiolo, Larry Feldman, Greg Witte
This bulletin summarizes the information presented in NIST SP 800-178: A Comparison of Attribute Based Access Control (ABAC) Standards for Data Service Applications. The publication describes Extensible Access Control Markup Language (XACML) and Next

Investigating Firebrand Accumulation over Various Scales

November 22, 2016
Author(s)
Samuel Manzello, Sayaka Suzuki
As structures are exposed to wind, stagnation planes are produced around structures. Using full-scale experiments, the authors demonstrated that firebrands may accumulate in these stagnation planes. In a subsequent full-scale study performed by the authors

On-Chip Temperature Distribution for Josephson Voltage Standards

November 22, 2016
Author(s)
Anna E. Fox, Evan B. Golden, Paul D. Dresselhaus, Samuel P. Benz
A substrate surface temperature characterization for the National Institute of Standards and technology Josephson voltage standard has been performed by fabricating and measuring Josephson junction arrays with on-chip thermometry. Circuits were designed

Oscillatory Non-Collinear Magnetism Induced by Interfacial Charge Transfer in Metallic Oxide Superlattices

November 22, 2016
Author(s)
Jason D. Hoffman, Brian Kirby, Jihwan Kwon, Gilberto Fabbris, John W. Freeland, Ivar Martin, Olle G. Heinonen, Paul Steadman, Hua Zhou, Christian M. Schleputz, Suzanne G. E. te Velthuis, Jian-Min Zuo, Anand Bhattacharya
Interfaces between correlated complex oxides are promising avenues to realize new forms of magnetism that arise as a result of charge transfer, proximity effects and locally broken symmetries. We report upon the discovery of a non-collinear magnetic

Study of Direct Lithiation of Thin Si Membranes with Spatially-Correlative Low Energy Focused Li Ion Beam and Analytical Electron Microscopy Techniques

November 22, 2016
Author(s)
Vladimir P. Oleshko, Christopher L. Soles, Kevin A. Twedt, J J. McClelland
Understanding and controlling defect interactions and transport properties of Li ions in silicon is crucial for the development of emerging technologies in energy storage and microelectronics. With a theoretical energy storage capacity of ~4200 mAhg-1

Urine Proteomics in the Era of Mass Spectrometry

November 22, 2016
Author(s)
Ashley B. Green
With the technological advances of mass spectrometry (MS)-based platforms, clinical proteomics is one of the most rapidly growing areas in biomedical research. Urine proteomics has become a popular sub-discipline of clinical proteomics because it is an

Concurrent Magnetic and Structural Reconstructions at the Interface of (111)-Oriented La 0.07 Sr 0.3 MnO 3 /LaFeO 3

November 21, 2016
Author(s)
I. Hallsteinsen, M. Moreau, Alexander Grutter, M. Nord, P.-E. Vullum, Dustin A. Gilbert, T. Bolstad, J. K. Grepstad, R. Holmestad, S. M. Selbach, A. T. N'Diaye, Brian Kirby, E. Arenholz, T. Tybell
We observe an induced switchable magnetic moment of 1.6 ± 0.40 υ B/Fe in the nominally antiferromagnetic LaFeOd3^/La 0.7Sr 0.3MnO 3/SrTiO 3(111). The magnetic reconstruction is driven by a mismatch of oxygen octahedra rotations resulting in an atomic

Lets Talk, Robots

November 21, 2016
Author(s)
Craig I. Schlenoff
This is a short article for Scientific Computing Magazine, at the request of the editor, that describes the IEEE 1872 IEEE Standard Ontologies for Robotics and Automation standard.

Manipulation of magnetic anisotropy through linear piezoelectric response in magnetoelectric heterostructures

November 21, 2016
Author(s)
Daniel B. Gopman, Robert D. Shull, Yury Y. Iunin, Margo Staruch, Shu-Fan Cheng, Konrad Bussmann, Peter Finkel
The ability to tune both magnetic and electric properties concomitantly in magnetoelectric (ME) composite heterostructures coupled through interfacial strain is crucial for multiple transduction applications including energy harvesting or magnetic field

Survey and New Directions for Physics-Based Attack Detection in Control Systems

November 21, 2016
Author(s)
David Urbina, Jairo Giraldo, Alvaro Cardenas, Junia Valente, Mustafa Faisal, Niles O. Tippenhauer, Justin Ruths, Rick Candell, Heinrik Sandberg
Monitoring the "physics" of control systems to detect attacks is a growing area of research. In its basic form a security monitor creates time-series models of sensor readings for an industrial control system and identifies anomalies in these measurements
Displaying 14926 - 14950 of 73697
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