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Displaying 15076 - 15100 of 73925

Absence of Long-Wavelength Nematic Fluctuations in LiFeAs

December 1, 2016
Author(s)
Adrian Merritt, Jose Rodriguez Rivera, Yu Li, Weiyi Wang, Chenglin Zhang, Pengcheng Dai, Dmitry Reznik
We investigated long-wavelength nematic fluctuations in an Fe-based superconductor LiFeAs near q=(0.05,0,0) by measuring temperature-dependent renormalization of acoustic phonons through inelastic neutron scattering. We found that the phonons have

An Open Web-Based Repository for Capturing Manufacturing Process Information

December 1, 2016
Author(s)
William Z. Bernstein, Mahesh Mani, Katherine C. Morris, Kevin W. Lyons, Bjoern J. Johansson
With recent progress in developing more effective models for representing manufacturing processes, this paper presents an approach towards an open web-based repository for storing manufacturing process information. The repository is envisioned to include

Bayesian Method for the Analysis of Diffraction Patterns using BLAND

December 1, 2016
Author(s)
Joseph E. Lesniewski, Steven M.T. Disseler, Dylan J. Quintanta, Paul A. Kienzle, William D. Ratcliff
Rietveld refinement of x-ray and neutron diffraction patterns is routinely used to solve crystal and magnetic structures of organic and inorganic materials over many length scales. Despite its success over the last several decades, conventional Rietveld

Biomimetic Sniffing with an Artificial Dogs Nose Leads to Improvements in Vapor Sampling and Detection

December 1, 2016
Author(s)
Matthew E. Staymates, William A. MacCrehan, Jessica L. Staymates, John G. Gillen, Brent Craven, Rod Kunz, Ted Mendum, Ta-Hsuan Ong
This work presents fluid flow visualization studies and chemical detection experiments using an 3D printed anatomically-correct biomimetic canine nose from a female Labrador retriever. Schlieren imaging, high-speed videography, along with flow

Characterization of Yttrium-Rich Precipitate Phases in a Titanium Alloy Weld

December 1, 2016
Author(s)
Andrew Herzing, Ratna P. Kolli, Sreeramamurthy Ankem
The yttrium-rich (Y-rich) precipitates that form in the fusion zone (FZ) of a Ti-5111 alloy weld were characterized by atom probe tomography and scanning transmission electron microscopy. Two distinct types of precipitates were identified: (1) a higher

Colored Oxides with Hibonite Structure: A Potential Route to Non-cobalt Blue Pigments

December 1, 2016
Author(s)
Jun Li, Elena A. Medina, Judith K. Stalick, Arthur W. Sleight, M. A. Subramanian
The crystal structure of hibonite with an ideal formula CaAl 12O 19 is hexagonal P6 3/mmc, isostructural with magnetoplumbite. Natural and synthetic hibonites have been widely studied for their formation, compositions, crystal structures, properties and

Coordinated Universal Time and the Leap Second

December 1, 2016
Author(s)
Judah Levine
I will discuss the considerations that were important in the design of the current version of Coordinated Universal Time. The design includes the addition of additional “leap” seconds to keep Coordinated Universal time within 0.9 s of the UT1 time scale

Enhanced Sensitivity of Neil1-/- Mice to Chronic UVB Exposure

December 1, 2016
Author(s)
M Miral Dizdar, Marcus J. Calkins, Vladimir Vartanian, Guldal Kirkali, Amanda K. McCullough, R. S. Lloyd, Pawel Jaruga
DNA base damage induced by oxidative stress and reactive oxygen species (ROS) are thought to be central mediators of ultraviolet light (UV)-induced carcinogenesis and skin aging. However, increased steady-state levels of ROS-induced DNA base damage have

Large Anomalous Hall Effect in a Half-Heusler Antiferromagnet

December 1, 2016
Author(s)
T. Suzuki, Robin Michael Daub Chisnell, A. Devarakonda, Y.-T. Liu, W. Feng, D. Xiao, Jeffrey W. Lynn, J. G. Checkelsky
The quantum mechanical (Berry) phase of the electronic wavefunction has profound effects on spin-dependent behavior in solids [2,2]. In the context of electronic transport, the Berry phase plays a critical role as a fundamental origin of the anomalous [3,4

Lessons Learned from Monitoring Organic Contaminants in Three Decades of Marine Samples from the Pacific Basin Archived at the USA's Marine Environmental Specimen Bank

December 1, 2016
Author(s)
Stacy Schuur, Paul R. Becker, Colleen E. Bryan Sallee, Rebecca Pugh, Jared Ragland, Jessica Reiner, Jennifer Hoguet, Michele M. Schantz
The USA's Marine Environmental Specimen Bank (ESB) has archived marine wildlife collections dating back to 1976. Numerous lessons have been learned including collecting the correct species and tissues for environmental contaminant monitoring, developing
Displaying 15076 - 15100 of 73925
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