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68 results for “solar activity”
Dataset for "Comparative Analysis of Machine Learning Models to Forecast Flaring Capability of Solar Active Regions: A Parameter Based Approach"
<p>This CSV file contains the values of 14 selected magnetic features along with the active region class for all the regions used in our study. As discussed in the paper, these 14 magnetic features characterize the properties of active regions. All these magnetic features are obtained from the HMI SHARP data series which provides open-sourced vector magnetic field information of solar active regions. the column named 'AR_class' carries information about the class of active regions i.e., 1 for flaring regions and 0 for non-flaring regions.</p>
Direct evidence that twisted flux tube emergence creates solar active regions
<p>This dataset is related to the paper "Direct evidence that twisted flux tube emergence creates solar active regions" in Nature Communications. There are three main elements:</p> <p>1. Source data: data for all the observational helicity and winding accumulation figures.</p> <p>2. Winding code: the code to download magnetograms and calculate helicity and winding fluxes.</p> <p>3. Simulation code: the MHD code used for the example flux emergence simulation.</p> <p>Instructions are included with the codes.</p>
Stellar chromospheric activity database of solar-like stars based on the LAMOST Low-Resolution Spectroscopic Survey
<p>A stellar chromospheric activity database of solar-like stars is constructed based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Low-Resolution Spectroscopic Survey (LRS). The database contains spectral bandpass fluxes and indexes of Ca II H and K lines derived from 1,330,654 high-quality LRS spectra of solar-like stars. We measure the mean fluxes at line cores of the Ca II H and K lines using a 1 Å rectangular bandpass and a 1.09 Å FWHM triangular bandpass, as well as the mean fluxes of two 20 Å wide pseudocontinuum bands on the two sides of the lines. Three activity indexes of Ca II H and K lines, <em>S</em><sub>rec</sub> based on the 1 Å rectangular bandpass and <em>S</em><sub>tri</sub> and <em>S<sub>L</sub></em> based on the 1.09 Å FWHM triangular bandpass, are evaluated from the measured fluxes to quantitatively indicate the chromospheric activity level. The uncertainties of all the obtained parameters are estimated. We also produce spectrum diagrams of Ca II H and K lines for all the spectra in the database. This database, with more than one million high-quality LAMOST LRS spectra of Ca II H and K lines and basal chromospheric activity parameters, can be further used for investigating activity characteristics of solar-like stars and solar-stellar connection.</p> <p> </p> <p>The entity of the database is composed of (1) a catalog of spectral sample and activity parameters, and (2) a library of spectrum diagrams of Ca II H and K lines.</p> <p>(1) Catalog of Spectral Sample and Activity Parameters<br> CaIIHK_Sindex_LAMOST_DR7_LRS.csv<br> (see Table3 in the paper 2022_ApJS_263_12 for description of the columns)</p> <p>(2) Library of Spectrum Diagrams of Ca II H and K lines<br> spectrum_diagrams_000-049.zip (46 subfolders)<br> spectrum_diagrams_050-099.zip (40 subfolders)<br> spectrum_diagrams_100-149.zip (47 subfolders)<br> spectrum_diagrams_150-174.zip (25 subfolders)<br> spectrum_diagrams_175-199.zip (24 subfolders)<br> spectrum_diagrams_200-224.zip (24 subfolders)<br> spectrum_diagrams_225-249.zip (23 subfolders)<br> spectrum_diagrams_250-259.zip (10 subfolders)<br> spectrum_diagrams_260-274.zip (12 subfolders)<br> spectrum_diagrams_275-299.zip (23 subfolders)<br> spectrum_diagrams_300-349.zip (41 subfolders)<br> spectrum_diagrams_350-374.zip (20 subfolders)<br> spectrum_diagrams_375-399.zip (19 subfolders)<br> spectrum_diagrams_400-424.zip (23 subfolders)<br> spectrum_diagrams_425-449.zip (22 subfolders)<br> spectrum_diagrams_450-499.zip (35 subfolders)<br> spectrum_diagrams_500-549.zip (27 subfolders)<br> spectrum_diagrams_550-599.zip (38 subfolders)<br> spectrum_diagrams_600-649.zip (32 subfolders)<br> spectrum_diagrams_650-699.zip (26 subfolders)<br> spectrum_diagrams_700-749.zip (28 subfolders)</p>
Melanoma of the Skin and Exposure to Solar Ultraviolet Radiation at Work in Modena Territory: a Case-control Study to Promote an Active Search and Prevention of Occupational Diseases Based on Recent I
ClinicalTrials.gov study NCT07251335. IPD Sharing: NO. Countries: 1. Publications: 7.
SOLAR: Efficacy and Safety of Cobomarsen (MRG-106) vs. Active Comparator in Subjects With Mycosis Fungoides
ClinicalTrials.gov study NCT03713320. IPD Sharing: NO. Countries: 8. Publications: 2.
Solar parks provide heterogeneous habitats for winter-active ground-dwelling predatory arthropods
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Data from: Pollination on the dark side: acoustic monitoring reveals impacts of a total solar eclipse on flight behavior and activity schedule of foraging bees
The total solar eclipse of 21 August 2017 traversed ~5000 km from coast to coast of North America. In its 90-min span, sunlight dropped by three orders of magnitude and temperature by 10–15°C. To investigate impacts of these changes on bee (Hymenoptera: Apoidea) pollinators, we monitored their flights acoustically in natural habitats of Pacific Coast, Rocky Mountain, and Midwest regions. Temperature changes during the eclipse had little impact on bee activity. Most of the explained variation (R2) in buzzing rate was attributable to changes in light intensity. Bees ceased flying during complete darkness at totality, but flight activity was unaffected by dim light in partial phases before and after totality. Flights of bees during partial phases of the eclipse lasted longer than flights made under full sun, showing that behavioral plasticity matched bee flight properties to changes in light intensity during the eclipse. Efforts of citizen scientists, including hundreds of school children, contributed to the scope and educational impact of this study.
FIGURE 2 in A new solar powered species of the genus Phyllodesmium Ehrenberg, 1831 (Mollusca: Nudibranchia: Aeolidoidea) from Indonesia with analysis of its photosynthetic activity and notes on biology
FIGURE 2: Phyllodesmium jakobsenae, morphology: A: General outline of organs in situ. B: Digestive tract (oral glands omitted). C: Right jaw seen from the interior side. D: Distal genital system. E: Schematic cross section of apical part of ceras. The upper side represents the part which is exposed to light, when resting on the food coral. F: Central nervous system. Abbreviations: a anus, am ampulla, au auricle, bg buccal ganglion, ca capsule gland, cplg cerebropleural ganglion, dgl digestive gland, e eye, i intestine, mu mucous gland, og oral glands, ot oral tentacles, pg pedal ganglion, ph pharynx, pr prostate, rec receptaculum seminis, rh rhinophore, rhg rhinophoral ganglion, sy syrinx, ve ventricle.
FIGURE 3 in A new solar powered species of the genus Phyllodesmium Ehrenberg, 1831 (Mollusca: Nudibranchia: Aeolidoidea) from Indonesia with analysis of its photosynthetic activity and notes on biology
FIGURE 3: Phyllodesmium jakobsenae, hard structures in digestive system: A: Right jaw seen from the outside. B: Left jaw from the inside, denticles at the masticatory border seen from the inside. C: Distal part of radula of specimen No. 5. D: Closeup of distal part of radula of specimen No. 5; note the worn denticles on the edge of the rhachidian teeth.. E: Distal part of radula of specimen No. 3. F: Different angle of view of rhachidian cusps from No. 3. G: Part of the radula of specimen No. 3.
FIGURE 4 in A new solar powered species of the genus Phyllodesmium Ehrenberg, 1831 (Mollusca: Nudibranchia: Aeolidoidea) from Indonesia with analysis of its photosynthetic activity and notes on biology
FIGURE 4: Phyllodesmium jakobsenae, histology: A: View of ceras from side orientated to light. Note the dense branches along the whole ceras. B: View of ceras from side orientated away from light. Note the main branch of digestive gland and the fewer ramifications. C: Cnidosac of large ceras with no nematocysts. D: Digestive glandular branches beneath epidermis in large ceras. Note the many zooxanthellae especially in the digestive glandular tissue. E: Longitudinal section of small ceras with cnidosac. The digestive glandular duct is not branching, and shows glandular cells. The cnidosac is filled with many tiny nematocysts. The epidermis shows many glandular cells, beneath the epidermis a layer of "cellules spéciales" can be seen. F: Section trough eye and statocyst with one statolith. G: Small part of the oral gland with outleading duct. Abbreviations: cn cnidosac, cs "cellules spéciales", e eye, mc mucous cells, st statocyst.
FIGURE 1 in A new solar powered species of the genus Phyllodesmium Ehrenberg, 1831 (Mollusca: Nudibranchia: Aeolidoidea) from Indonesia with analysis of its photosynthetic activity and notes on biology
FIGURE 1: Phyllodesmium jakobsenae, living animals from North Sulawesi: A: Specimen laying eggs in an aquarium. B: Two specimens sitting in their food coral Xenia: on the right side a specimen with more brownish cerata and to the left a bigger specimen with more whitish cerata. Polyps of Xenia surround both individuals. C: Bigger specimen from B; please note the smaller cerata in the anterior part of body and the oral tentacles stretched to the lateral sides. D: Animal sitting inactive and mimicking Xenia polyps. E: Specimen starting to crawl.
Ionosphere-thermosphere data published in 'The 2D evolution of thermospheric ∑O/N2 response to weak geomagnetic activity during solar-minimum observed by GOLD'
This dataset was used to generate plots for a paper in the Geophysical Research Letter, an AGU journal. It includes the percentage difference of column density ratio of O/N2 between quiet time (DOY 153 in 2019) and weak geomagnetic activity time (DOY 156 in 2019), together with the meridional wind, zonal wind, meridional component and the zonal component of E cross B drift at pressure level -1.375 (160-170 km).
Data for the figures in paper 'Variations in thermosphere composition and ionosphere total electron content under extremely weak geomagnetic activity conditions at solar-minimum'
This data set include the simulated percentage difference of O to N2 column density ratio between DOY 111 and 110 (Figure 3 of paper), and the absolute difference of neutral wind vector at pressure level -1.375 (Figure 3 of paper).They are from 0:10 UT to 23:55 UT on DOY 111 in 2019 with a temporal resolution of 15-min. And the absolute difference of diagnostic terms (horizontal advection, vertical advection and molecular diffusion) of O at pressure level -1.375 at 13:10 UT (Figure 4 of the paper)
Dataset of "Photoactivity Enhancement by Electrochemical Activation of Bifunctional V2C@S MXene: Desirable Approach in Single-architecture High-rate Zinc-ion Solar Batteries"
Single-architecture solar battery energy storage devices which are capable of storing energy from solar energy harvesting in only one package, are being developed as the upcoming and future off-grid energy storage systems. In this research, we explore the photo-responsive characteristics and application of vanadium-based MXene in pouch zinc-ion solar batteries. In addition to the pristine V2CTx MXene, a sulfur-incorporated nanocomposite of V2CTx@S was synthesized via a reaction between exfoliated V2CTx MXene and sulfur at a high benign temperature to evaluate the efficiency of both as photocathodes for such state-of-the-art devices. Through the initial electrochemical charging activation, photoactivity of the V2CTx@S photocathode was enhanced significantly because of the formation of nanoscale vanadium oxide on the surface of conductive V2CTx MXene and the presence of sulfur element without losing the MXene nanolayered characteristics. The results of the pouch zinc-ion solar battery made by V2CTx@S indicate a specific capacity of 197 mAh g–1 at 1 A g–1 under illumination, compared to the dark condition with the amount of 114 mAh g–1 at 1 A g–1 (72.8% enhancement). Additionally, the V2CTx@S zinc-ion solar battery carried out a photo-charging voltage response of 700 mV, and a remarkable energy density of 255 Wh kg–1 at 1 A g–1 under illumination compared to dark conditions with the energy density of 150 Wh kg–1 at 1 A g‒1. Furthermore, a photoconversion efficiency of ≈2.04% was obtained in the pouch zinc-ion solar battery. Density functional theory studies supported these experimental findings by revealing that sulfur modification and vanadium oxide formation improve the electronic properties and light absorption capabilities of the pristine V2C MXene, contributing to its superior photocathodic performance. These great achievements in photo-electrochemical behaviors of V2CTx@S are due to the catalytic synergy of bifunctional MXene decorated with sulfur element, the formation of outer high-valence vanadium oxide, and inner conductive of V2CTx. The findings provide crucial insights into designing of highly efficient photocathode materials for advanced solar batteries.
Supplementary dataset for the research article "Abrupt increase in ENSO variability at 700 CE triggered by solar activity"
<p>The dataset includes coral Sr/Ca ratio from the Xisha Islands during 665-749 CE for the research article "<strong>Abrupt increase in ENSO variability at 700 CE triggered by solar activity</strong>" by Jiang et al.</p>
GPS data for 'Low-Latitude Ionospheric Density Irregularities and Associated Scintillations Investigated by Combining COSMIC RO and Ground-Based GPS Observations over a Solar Active Period' by Zhe Yang and Zhizhao Liu
<p>This dataset contains the final derived GPS data reported in the paper 'Low-Latitude Ionospheric Density Irregularities and Associated Scintillations Investigated by Combining COSMIC RO and Ground-Based GPS Observations over a Solar Active Period' by Zhe Yang and Zhizhao Liu.</p>
Influence of solar activity on penetration of travelling planetary-scale waves from the troposphere into the thermosphere
<p>This dataset contains model output files and examples of scripts for depicting figures related to the article "Influence of solar activity on penetration of travelling planetary-scale waves from the troposphere into the thermosphere" by A.V. Koval, N. M. Gavrilov, A. I. Pogoreltsev, N. O. Shevchuk.</p> <p>Contents:<br> averh.zip - Output data from model simulations averaged over 12 runs with high solar activity;<br> /averh/uvt400_Jan_ogw_volf.dx - Zonal, meridional wind components, temperature (structure corresponds to uvt.ctl);<br> /averh/phi.dx - Geopotential height in gpm;<br> /averh/gh_m1_1.dx, /averh/gh_m2_1.dx - Estimated PSW amplitudes and phases after the longitude-time Fourier transform of the MUAM solutions with the least squares fitting of the geopotential height (zonal wavenumber 1 and 2, respectively)<br> /averh/zw_m1_1.dx, /averh/zw_m2_1.dx, /averh/mw_m1_1.dx, /averh/mw_m2_1.dx, /averh/tp_m1_1.dx, /averh/tp_m2_1.dx - The same but for wind components and temperature, respectively<br> averl.zip - Output data from model simulations averaged over 12 runs with low solar activity; contents are similar to "averh.zip"<br> files *.gs, *.ctl - Examples of the scripts and file descriptions for GRADS system to build figures shown in the manuscript.<br> Additional data including outputs from separate model runs are available from the authors upon request. </p>
Influence of thermospheric impacts of solar activity on the general circulation and long-period planetary waves in the middle atmosphere
<p>This dataset contains model output files and examples of scripts for depicting figures related to the article "Influence of thermospheric impacts of solar activity on the general circulation and long-period planetary waves in the middle atmosphere " by A.V. Koval, N. M. Gavrilov, A. I. Pogoreltsev, N. O. Shevchuk.</p> <p><br> Contents:<br> Output data from model simulations averaged over 16 pairs of model runs with high and low solar activity:</p> <p><br> gh_m1_hsa5.dx, gh_m1_lsa5.dx – amplitudes of the geopotential height variations in g.p.m. at high and low solar activity caused by long-period PW modes with zonal wavenumber 1 averaged over 80 time subintervals selected from pairs of the MUAM runs (structure described in w1_tp1_hsa.ctl, w1_tp1_lsa.ctl).<br> gh_m2_hsa5.dx, gh_m2_lsa5.dx, gh_m3_hsa5.dx, gh_m3_lsa5.dx, gh_m4_hsa5.dx, gh_m4_lsa5.dx – the same but for zonal wavenumbers 2,3,4.<br> gh_m1_disp_dif5.dx – dispersion of differences in corresponding wave amplitudes between high and low solar activitiy (w1_tp1_disp.ctl).<br> gh_m2_disp_dif5.dx, gh_m3_disp_dif5.dx, gh_m4_disp_dif5.dx – the same but for zonal wavenumbers 2,3,4.<br> index_refr1_1_5.dx, index_refr1_2_5.dx, index_refr1_3_5.dx, index_refr1_4_5.dx – the zonal-mean quasi-geostrophic complex refractivity index squared (RI2) for PW modes with zonal wavenumbers 1-4 (ind_refr1_1.ctl).<br> uq_vwres1_pv_Jan_1_5.dx, uq_vwres1_pv_Jan_2_5.dx, uq_vwres1_pv_Jan_3_5.dx, uq_vwres1_pv_Jan_4_5.dx – the Eliassen-Palm flux for PW modes with zonal wavenumbers 1-4 (uqep1_vwres_1.ctl).<br> zw_a0_grads5_hsa.dx, tp_a0_grads5_hsa.dx – zonal-mean zonal wind in m/s and temperature in K for December – February averaged over 16-member ensemble of model runs for high solar activity (m0_zw5_hsa.ctl, m0_tp5_hsa.ctl).<br> zw_a0_grads5_lsa.dx, tp_a0_grads5_lsa.dx – the same but for the low solar activity<br> disp_U_dif5_.dx, disp_T_dif5_.dx – dispersion of differences in zonal wind and temperature between high and low solar activitiy for December – February averaged over 16-member ensemble of model runs (tp1_disp.ctl).<br> Additional data including outputs from separate model runs are available from the authors upon request.</p>
Renewable energies and biodiversity: impact of ground-mounted solar photovoltaic sites on bat activity
<ol> <li>Renewable energy is growing at a rapid pace globally, but as yet there has been little research on the effects of ground-mounted solar photovoltaic (PV) developments on bats, many species of which are threatened or protected.</li> <li>We conducted a paired study at 19 ground-mounted solar PV developments in southwest England. We used static detectors to record bat echolocation calls from boundaries (i.e., hedgerows) and central locations (open areas) at fields with solar PV development, and simultaneously at matched sites without solar PV developments (control fields). We used generalized linear mixed-effect models to assess how solar PV developments and boundary habitat affected bat activity and species richness.</li> <li>The activity of six of eight species/species groups analysed was negatively affected by solar PV panels, suggesting that loss and/or fragmentation of foraging/commuting habitat is caused by ground-mounted solar PV panels. <em>Pipistrellus</em> <em>pipistrellus</em> and <em>Nyctalus</em> spp. activity was lower at solar PV sites regardless of the habitat type considered. Negative impacts of solar PV panels at field boundaries were apparent for the activity of <em>Myotis</em> spp. and <em>Eptesicus</em> <em>serotinus</em>, and in open fields for <em>Pipistrellus</em> <em>pygmaeus</em> and <em>Plecotus</em> spp.</li> <li>Bat species richness was greater along field boundaries compared with open fields, but there was no effect of solar PV panels on species richness.</li> <li> <em>Policy Implications</em>: Ground-mounted solar PV developments have a significant negative effect on bat activity, and should be considered in appropriate planning legislation and policy. Solar PV developments should be screened in Environmental Impact Assessments for ecological impacts, and appropriate mitigation (e.g., maintaining boundaries, planting vegetation to network with surrounding foraging habitat) and monitoring should be implemented to highlight potential negative effects.</li> </ol>
Renewable energies and biodiversity: impact of ground-mounted solar photovoltaic sites on bat activity
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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.