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9 results for “corona discharge”
Electrocharging face masks with corona discharge treatment
<p></p><p>We detail an experimental method to electrocharge N95 facepiece respirators and face masks (FMs) made from a variety of fabrics (including non-woven polymer and knitted cloth) using corona discharge treatment (CDT). We present practical designs to construct a CDT system from commonly available parts and detail calibrations performed on different fabrics to study their electrocharging characteristics. After confirming the post-CDT structural integrity of fabrics, measurements showed that all non-woven polymer electret and only some knitted cloth fabrics are capable of charge retention. Whereas polymeric fabrics follow the well-known isothermal charging route, ion adsorption causes electrocharging in knitted cloth fabrics. Filtration tests demonstrate improved steady filtration efficiency in non-woven polymer electret filters. On the other hand, knitted cloth fabric filters capable of charge retention start with improved filtration efficiency which decays in time over up to 7 h depending on the fabric type, with filtration efficiency tracking the electric discharge. A rapid recharge for a few seconds ensures FM reuse over multiple cycles without degradation.</p><p></p>
Acoustic activity of bats at power lines correlates with relative humidity: A potential role for corona discharges
<p><span>With the ever-increasing dependency on electric power, electrical grid networks are expanding worldwide. Bats exhibit a wide diversity of foraging and flight behaviours, and their sensitivity to anthropogenic stressors suggests this group is very likely to be affected by power lines in a myriad of ways. Yet the effects of power lines on bats remain unknown. Here we assessed the responses of insectivorous bats to very-high-voltage power lines (>220 kV, VHVPL). We implemented a paired sampling design and monitored bats acoustically at 25 pairs, one pair consisting of one forest edge near to VHVPL matched with one control forest edge. Relative humidity mediates the effects of power lines on bats: we detected bat attraction to VHVPL at high relative humidity levels and avoidance of VHVPL by bats at low relative humidity levels. We argue that the former could be explained by insect attraction to the light emitted by VHVPL due to corona discharges while the latter may be due to the physical presence of pylons/cables at foraging height and/or because of electromagnetic fields. Our work highlights the response of bats to power lines at foraging habitats, providing new insight into the interactions between power lines and biodiversity.</span></p>
Electrocharging face masks with corona discharge treatment
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Acoustic activity of bats at power lines correlates with relative humidity: A potential role for corona discharges
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Quasi-2D Finite Volume Modeling of Corona Discharges for Ionic Propulsion: Comparison of Reduced Reaction Schemes
<p>This work investigated the effects of different kinetic models on the results of corona discharge simulations of a wire-cylinder geometry. The considered dry air kinetic models are: a 6-species model from Parent et al. (<a title="https://doi.org/10.1016/j.jcp.2013.11.029" href="https://doi.org/10.1016/j.jcp.2013.11.029" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.jcp.2013.11.029</a>), a Townsend-like model (<a title="http://dx.doi.org/10.1088/0022-3727/30/4/017" href="http://dx.doi.org/10.1088/0022-3727/30/4/017" target="_blank" rel="noreferrer noopener">http://dx.doi.org/10.1088/0022-3727/30/4/017</a>) and the simple model proposed by Mateo-Velez et al. (<a title="http://dx.doi.org/10.1088/0022-3727/41/3/035205" href="http://dx.doi.org/10.1088/0022-3727/41/3/035205" target="_blank" rel="noreferrer noopener">http://dx.doi.org/10.1088/0022-3727/41/3/035205</a>).</p>
Effects of a negative corona discharge on subsequent positive streamers
<p>Data Description for "Effects of a negative corona discharge on subsequent positive streamers":</p> <p>1. ICCD files_long exposure: pictures of streamers in 80 mbar air and nitrogen with 500 ns exposure.</p> <p>2. ICCD files_short exposure: pictures of streamers in 80 mbar air and nitrogen with 50 ns exposure.</p> <p>3. waveforms: the oscilloscope waveforms streamers and corona discharge in 80 mbar air.</p>
Data used for publication on 'Analysis of blue corona discharges at the top of tropical thunderstorm clouds in different phases of convection'
<p>This data was used from implementing Figures 1-4 in the main manuscript and all the Figures in the Supportive Information of the submitted publication 'Analysis of blue corona discharges at the top of tropical thunderstorm clouds in different phases of convection'.</p>
Data for: Nitrous oxide formation by corona discharge: Isotopic composition measurements and atmospheric applications
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Data for "Different types of corona discharges associated with high-altitude positive Narrow Bipolar Events nearby cloud top"
<p>The VLF/LF radio data at Malaysia station support the findings of the paper "Different types of corona discharges associated with high-altitude positive Narrow Bipolar Events nearby cloud top " is presented here. </p> <p>Each file includes three columns: time(seconds), azimuthal magnetic field Bø (nT) and radial magnetic field Br (nT).</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.