Results 61 to 70 of about 483,474 (280)

Parkinson's disease and long-term exposure to outdoor air pollution: A matched case-control study in the Netherlands

open access: yesEnvironment International, 2019
Background: There is some evidence to suggest an association between ambient air pollution and development of Parkinson's disease (PD). However, the small number of studies published to date has reported inconsistent findings.
Rosario Toro   +12 more
doaj   +1 more source

Nanoslot metasurface design and characterization for enhanced organic light-emitting diodes

open access: yesScientific Reports, 2021
We investigate bottom-emitting organic light-emitting diodes (B-OLEDs) integrated with metasurface (MS) to analyze the effect of the structural parameters on the output performance.
Kyungnam Kang   +4 more
doaj   +1 more source

Are biogenic emissions a significant source of summertime atmospheric toluene in the rural Northeastern United States? [PDF]

open access: yes, 2009
Summertime atmospheric toluene enhancements at Thompson Farm in the rural northeastern United States were unexpected and resulted in a toluene/benzene seasonal pattern that was distinctly different from that of other anthropogenic volatile organic ...
Ambrose, Jesse L.   +10 more
core   +1 more source

Numerical simulations of shocks encountering clumpy regions

open access: yes, 2012
We present numerical simulations of the adiabatic interaction of a shock with a clumpy region containing many individual clouds. Our work incorporates a sub-grid turbulence model which for the first time makes this investigation feasible.
Arthur   +50 more
core   +1 more source

Effect of Pulse Shaping on Subharmonic Aided Pressure Estimation In Vitro and In Vivo. [PDF]

open access: yes, 2016
OBJECTIVES: Subharmonic imaging (SHI) is a technique that uses the nonlinear oscillations of microbubbles when exposed to ultrasound at high pressures transmitting at the fundamental frequency ie, f METHODS: Eight waveforms with different envelopes were ...
Dave, Jaydev K.   +11 more
core   +2 more sources

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

X-ray emission from stellar jets by collision against high-density molecular clouds: an application to HH 248 [PDF]

open access: yes, 2015
We investigate the plausibility of detecting X-ray emission from a stellar jet that impacts against a dense molecular cloud. This scenario may be usual for classical T Tauri stars with jets in dense star-forming complexes.
Albacete-Colombo, Juan Facundo   +8 more
core   +6 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Synergic impact of volcanic ash, carbide lime residue, and curing regime on the performance of geopolymer composites

open access: yesCase Studies in Construction Materials
This research explores the impact of different parameters on the properties of geopolymer (GP) composites incorporating volcanic ash (VA) and carbide lime residue (CLR). The Taguchi design of experiments was employed, considering five factors such as the
Ponalagappan Chokkalingam   +3 more
doaj   +1 more source

Correlation strength, Lifshitz transition and the emergence of a two- to three-dimensional crossover in FeSe under pressure

open access: yes, 2018
We report a detailed theoretical study of the electronic structure, spectral properties, and lattice parameters of bulk FeSe under pressure using a fully charge self-consistent implementation of the density functional theory plus dynamical mean-field ...
Anisimov, V. I.   +3 more
core   +1 more source

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