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Displaying 15051 - 15075 of 73893

Pathloss Models for Indoor Hotspot Deployment at 83.5 GHz

December 3, 2016
Author(s)
Camillo Gentile, Jelena Senic, Peter B. Papazian, Jae-Kark Choi, Kate Remley
Conventional pathloss models are based on the received power from an omnidirectional antenna. Millimeter-wave receivers, conversely, will feature highly directional antennas that can be steered towards the angle with maximum power, exploiting their high

Architecture for Software-assisted Quantity Calculus

December 2, 2016
Author(s)
David W. Flater
A quantity value, such as 5 kg, consists of a number and a reference (often an International System of Units (SI)unit) that together express the magnitude of a quantity. Many software libraries, packages, and ontologies that implement "quantities and units

First-principles phase diagram calculations for the carbonate quasibinary systems CaCO(sub3)-ZnCO(sub3), CdCO(sub3)-ZnCO(Sub3), CaCO(sub3)-CdCO(sub3) and MgCO(Sub3)-ZnCO(sub3)

December 2, 2016
Author(s)
Z.T.Y. Liu, Benjamin P. Burton, S. V. Khare, P. Sarin
Quasibinary solid solutions of calcite-structure carbonate minerals play an important role in rock formation. We have investigated solid solutions with cations such as Ca, Cd, Mg and Zn by performing first-principles phase diagram calculations for Ca1

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
Displaying 15051 - 15075 of 73893
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