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1,891 results for “Field data”
Data for Stress fields around magma chambers influenced by elastic thermo-mechanical deformation: implications for forecasting chamber failure
<p>COMSOL model outputs as .txt files. as supplement to the paper: Stress fields around magma chambers influenced by elastic thermo-mechanical deformation: implications for forecasting chamber failure which has been submitted for publication in Scientific Reports. </p> <p> </p> <p> </p>
Data for ""Approximate multifractal correlation and products of universal multifractal fields, with application to rainfall data" by Auguste Gires, Ioulia Tchiguirinskaia, and Daniel Schertzer, NPG 2020
<p>This data set corresponds to the python scripts and data that were used for the paper :<br> “Approximate multifractal correlation and products of universal multifractal fields, with application to rainfall data” by Auguste Gires, Ioulia Tchiguirinskaia, and Daniel Schertzer which has been published in 2020 in Nonlin. Processes Geophys. (https://www.nonlinear-processes-in-geophysics.net/).</p> <p>Should this data be used, the above mentioned paper should be cited.</p>
Data from the Blackpool testing controlled methane release field campaign of 2018
<p>This dataset contains raw data from Amanda (UAV1) and Phillipa (UAV2), which was acquired during UAV sampling downwind of a controlled methane release in the year 2018. Raw position and wind measurements are provided from on-board UAV1 with mole fraction measurements from a ground-based instrument connected to UAV. Raw position and mole-fraction measurements are provided from on-board UAV2. Wind speed and wind direction measurements are provided from a stationary anemometer. Temperature, pressure and relative humidity measurements are provided from a stationary monitoring station. Processed positional and corrected mole fraction measurements are provided for both UAVs. Derived wind-height profiles are provided for each flight survey. Flux results for all flight surveys are provided as MATLAB files, with results provided as a text output. Results for the analysis can be found in the journal article, "Testing the near-field Gaussian plume inversion flux quantification technique using unmanned aerial vehicle sampling", published in Atmospheric Measurement Techniques.</p>
Data from: Effect of coupled reduced irrigation and nitrogen fertilizer on soil mite community composition in a wheat field
Overuse of groundwater and nitrogen fertilizer constitute a severe threat to crop production, thus, low inputs of irrigation and nitrogen fertilizer were required in current ecological agriculture. The effects of combined reduced irrigation and nitrogen fertilizer addition on soil organism (e.g., mite) community and biodiversity remain poorly understood. We analyzed soil mite community composition, wheat grain yields, and soil characteristics in a ten-year manipulation experiment with two levels of irrigation (reduced irrigation and conventional irrigation) and five levels of nitrogen fertilizer (0, 70, 140, 210, 280 kg N ha-1). The study showed that reduced irrigation (20% reduction, from 280 to 220 mm) and nitrogen fertilizer (25% reduction, from 280 to 210 kg N ha-1) addition did not significantly influence soil mite community and wheat yields. The relative abundances of fungivore and predator showed negative quadratic relationships with wheat yields, while that of plant parasite was positive. The relationships between soil mite trophic groups and wheat yields revealed that we can elevated the impacts of reduced irrigation and nitrogen fertilizer addition from the perspective of soil fauna. The soil mite community composition was altered by soil abiotic factors prior to reduced irrigation and nitrogen fertilizer addition. On the whole, moderate reductions of irrigation and nitrogen fertilizer may not threaten to soil mite community and diversity or decrease crop production, on the contrary, it will benefit to the development of mite community and the sustainable agriculture.
Data of the article "Efficient spin torques in antiferromagnetic CoO/Pt quantified by comparing field- and current- induced switching"
<p>Data for experimental transport measurements and analytical calculations for the article "Efficient spin torques in antiferromagnetic CoO/Pt quantified by comparing field- and current- induced switching" (https://arxiv.org/abs/2003.05923)</p> <p> </p>
Data supplement for "Efficient calculation of phase coexistence and phase diagrams: application to a binary phase-field crystal model"
<p>This dataset contains the data and source files for the diagrams of the following publication:</p> <p><em>Holl, M. P., Archer, A.J., & Thiele, U.<br> Efficient calculation of phase coexistence and phase diagrams: application to a binary phase-field crystal model<br> arXiv preprint </em><br> <a href="https://arxiv.org/abs/2009.02946">arXiv:2009.02946</a><em>, 2020 </em></p> <p>We provide the data and sources necessary to generate figures 10-14 of the manuscript.</p> <p>Additionally we provide the MATLAB codes to run all the continuations for the results in sections 4.2 and 5. </p> <p>For more information, please see the included README.md</p>
Data from: A field experiment demonstrating plant life-history evolution and its eco-evolutionary feedback to seed predator populations
The extent to which evolutionary change occurs in a predictable manner under field conditions and how evolutionary changes feed back to influence ecological dynamics are fundamental, yet unresolved, questions. To address these issues, we established eight replicate populations of native common evening primrose (Oenothera biennis). Each population was planted with 18 genotypes in identical frequency. By tracking genotype frequencies with microsatellite DNA markers over the subsequent three years (up to three generations, ≈5,000 genotyped plants), we show rapid and consistent evolution of two heritable plant life-history traits (shorter life span and later flowering time). This rapid evolution was only partially the result of differential seed production; genotypic variation in seed germination also contributed to the observed evolutionary response. Since evening primrose genotypes exhibited heritable variation for resistance to insect herbivores, which was related to flowering time, we predicted that evolutionary changes in genotype frequencies would feed back to influence populations of a seed predator moth that specializes on O. biennis. By the conclusion of the experiment, variation in the genotypic composition among our eight replicate field populations was highly predictive of moth abundance. These results demonstrate how rapid evolution in field populations of a native plant can influence ecological interactions.
Data from: A large-scale field study examining effects of exposure to clothianidin seed-treated canola on honey bee colony health, development, and overwintering success
In summer 2012, we initiated a large-scale field experiment in southern Ontario, Canada, to determine whether exposure to clothianidin seed-treated canola (oil seed rape) has any adverse impacts on honey bees. Colonies were placed in clothianidin seed-treated or control canola fields during bloom, and thereafter were moved to an apiary with no surrounding crops grown from seeds treated with neonicotinoids. Colony weight gain, honey production, pest incidence, bee mortality, number of adults, and amount of sealed brood were assessed in each colony throughout summer and autumn. Samples of honey, beeswax, pollen, and nectar were regularly collected, and samples were analyzed for clothianidin residues. Several of these endpoints were also measured in spring 2013. Overall, colonies were vigorous during and after the exposure period, and we found no effects of exposure to clothianidin seed-treated canola on any endpoint measures. Bees foraged heavily on the test fields during peak bloom and residue analysis indicated that honey bees were exposed to low levels (0.5–2 ppb) of clothianidin in pollen. Low levels of clothianidin were detected in a few pollen samples collected toward the end of the bloom from control hives, illustrating the difficulty of conducting a perfectly controlled field study with free-ranging honey bees in agricultural landscapes. Overwintering success did not differ significantly between treatment and control hives, and was similar to overwintering colony loss rates reported for the winter of 2012–2013 for beekeepers in Ontario and Canada. Our results suggest that exposure to canola grown from seed treated with clothianidin poses low risk to honey bees.
Data from: Protein deprivation decreases male survival and the intensity of sexual antagonism in southern field crickets Gryllus bimaculatus
Recent theory predicts that the magnitude of sexual antagonism should depend on how well populations are adapted to their environment. We tested this idea experimentally by comparing intersexual genetic correlations for adult survival in pedigreed populations of southern field crickets (Gryllus bimaculatus) raised on naturally balanced (free-choice) vs. imbalanced (protein-deprived) diets. We tested for (1) sex differences in nutritional intake and preference, (2) sex-specific effects of protein deprivation on survival and (3) diet dependence of the level of sexual antagonism. Adult males and females consumed a similar amount of protein, but protein deprivation decreased male survival but not female survival. Protein deprivation appeared to decrease the degree of sexual antagonism as intersexual genetic correlations were significantly lower than 1 only for the complementary free-choice diet group but close to 1 for the protein-deficient diet group. Our findings thereby implied that variation in nutritional environments can alter the magnitude of sexual antagonism. This research represents an important step towards understanding the relationship between sexual antagonism and adaptation in heterogeneous environments.
Data from: Mycorrhizal feedback is not associated with the outcome of competition in old-field perennial plants
The symbiosis between plants and arbuscular mycorrhizal (AM) fungi is hypothesized to be an important contributor to plant–soil feedbacks, which can influence the outcome of inter-specific competition. Mycorrhizal feedbacks can be conspecific, which affects individuals of the same species, or heterospecific, which affects individuals of a different species. When heterospecific feedbacks are more positive than conspecific feedbacks, heterospecific individuals are expected to outcompete conspecific individuals. To test this hypothesis, we quantified conspecific mycorrhizal feedback for Plantago lanceolata as a focal species, and heterospecific mycorrhizal feedbacks for 21 competitor old-field species using mycorrhizae cultured with P. lanceolata. We quantified inter-specific competition against the focal species by growing the 21 old-field species with and without P. lanceolata in the presence of mycorrhizae cultured with P. lanceolata. Heterospecific and conspecific feedbacks were both positive, and average heterospecific feedbacks exceeded conspecific feedback by 75%. Competition suppressed P. lanceolata biomass by 14% and average competitor biomass was reduced by 44% in the presence of P. lanceolata, and these effects varied with competitor species identity. Contrary to predictions, the magnitude of heterospecific feedbacks did not predict the ability of competitor species to either suppress or resist suppression by P. lanceolata. Instead, the outcome of competition was significantly and positively correlated with intrinsic growth rate, measured as biomass of competitor species five weeks after germination in non-inoculated conditions. Our findings suggest that species experiencing more positive mycorrhizal feedbacks than a competitor do not necessarily have a competitive advantage. Mycorrhizal mediated soil feedbacks may be less important than intrinsic differences in growth rate in determining competitive outcomes.
Data from: Modeling spatial patterns of soil respiration in maize fields from vegetation and soil property factors with the use of remote sensing and geographical information system
To examine the method for estimating the spatial patterns of soil respiration (Rs) in agricultural ecosystems using remote sensing and geographical information system (GIS), Rs rates were measured at 53 sites during the peak growing season of maize in three counties in North China. Through Pearson's correlation analysis, leaf area index (LAI), canopy chlorophyll content, aboveground biomass, soil organic carbon (SOC) content, and soil total nitrogen content were selected as the factors that affected spatial variability in Rs during the peak growing season of maize. The use of a structural equation modeling approach revealed that only LAI and SOC content directly affected Rs. Meanwhile, other factors indirectly affected Rs through LAI and SOC content. When three greenness vegetation indices were extracted from an optical image of an environmental and disaster mitigation satellite in China, enhanced vegetation index (EVI) showed the best correlation with LAI and was thus used as a proxy for LAI to estimate Rs at the regional scale. The spatial distribution of SOC content was obtained by extrapolating the SOC content at the plot scale based on the kriging interpolation method in GIS. When data were pooled for 38 plots, a first-order exponential analysis indicated that approximately 73% of the spatial variability in Rs during the peak growing season of maize can be explained by EVI and SOC content. Further test analysis based on independent data from 15 plots showed that the simple exponential model had acceptable accuracy in estimating the spatial patterns of Rs in maize fields on the basis of remotely sensed EVI and GIS-interpolated SOC content, with R2 of 0.69 and root-mean-square error of 0.51 µmol CO2 m−2 s−1. The conclusions from this study provide valuable information for estimates of Rs during the peak growing season of maize in three counties in North China.
Data from: Effects of a 60 Hz magnetic field exposure up to 3000 µT on human brain activation as measured by functional magnetic resonance imaging
Several aspects of the human nervous system and associated motor and cognitive processes have been reported to be modulated by extremely low-frequency (ELF, < 300 Hz) time-varying Magnetic Fields (MF). Due do their worldwide prevalence; power-line frequencies (60 Hz in North America) are of particular interest. Despite intense research efforts over the last few decades, the potential effects of 60 Hz MF still need to be elucidated, and the underlying mechanisms to be understood. In this study, we have used functional Magnetic Resonance Imaging (fMRI) to characterize potential changes in functional brain activation following human exposure to a 60 Hz MF through motor and cognitive tasks. First, pilot results acquired in a first set of subjects (N=9) were used to demonstrate the technical feasibility of using fMRI to detect subtle changes in functional brain activation with 60 Hz MF exposure at 1800 μT. Second, a full study involving a larger cohort of subjects tested brain activation during 1) a finger tapping task (N=20), and 2) a mental rotation task (N=21); before and after a one-hour, 60 Hz, 3000 μT MF exposure. The results indicate significant changes in task-induced functional brain activation as a consequence of MF exposure. However, no impact on task performance was found. These results illustrate the potential of using fMRI to identify MF-induced changes in functional brain activation, suggesting that a one-hour 60 Hz, 3000 μT MF exposure can modulate activity in specific brain regions after the end of the exposure period (i.e., residual effects). We discuss the possibility that MF exposure at 60 Hz, 3000 μT may be capable of modulating cortical excitability via a modulation of synaptic plasticity processes.
Data from: Using radio telemetry to study behavioural thermoregulation in insects under field conditions
1. Thermoregulation is a central aspect of animal physiology. Mobile ectotherms have the potential to influence their temperature through their location and orientation. Behavioural thermoregulation has been extensively studied in insects, particularly in the migratory locust (Locusta migratoria). However, most field studies are confined to daytime observations typically using invasive thermocouples with obvious potential to disrupt natural behaviour. 2. We demonstrate that miniature radio-transmitters represent an alternative and less invasive method to study insect thermoregulation. We discuss how this method can be used to study the thermal behaviour of free-ranging animals for extended periods. Specifically, we show that there is a close correlation between temperature recordings from implanted thermocouples in locusts (L. migratoria) and externally mounted radio transmitters on the same animals. 3. Our experiments match earlier observations of locust thermoregulatory behaviour confirming that the locusts with transmitters exhibit "normal" thermoregulatory responses to feeding and to infections (behavioural fever). 4. Finally, we demonstrate the practicality of a radio-transmitter based system by recording natural thermoregulatory behaviour of locusts in a semi-field setting. Our field study showed locusts actively chose warm microclimates during the day and cold microclimates at night. We conclude that the use of radio-telemetry in studies of behavioural thermoregulation in wild insects could provide unique continuous recordings of body temperature over several days. Such data will provide researchers with a more complete understanding of how insects use behavioural thermoregulation in nature.
Field campaign observation data for 'Impacts of Heatwaves on Characteristics of Atmospheric Methylglyoxal in a Suburban Area in Eastern China'
Open the record for dataset details and reuse information.
Wide-field cortical calcium imaging data from behaving mice
<p>This data release contains simultaneous recordings of fluorescent<br>signals of the mouse cortex by wide-field calcium imaging and behavioral<br>activity from 5 animals.<br><br>These data were used in</p> <p>Ajioka T, Nakai N, Yamashita O, Takumi T (2024) End-to-end deep learning approach to mouse behavior classification from cortex-wide calcium imaging. PLoS Comput Biol 20(3): e1011074. https://doi.org/10.1371/journal.pcbi.1011074</p> <p><a href="https://doi.org/10.1371/journal.pcbi.1011074">https://doi.org/10.1371/journal.pcbi.1011074</a></p> <p> </p> <p>The code to make the figures in the paper is available at<br><br><a href="https://github.com/atakehiro/Neural_Decoding_from_Calcium_Imaging_Data" target="_blank" rel="noopener noreferrer">https://github.com/atakehiro/Neural_Decoding_from_Calcium_Imaging_Data</a><br><br>If you use these data in a paper, please cite the original research<br>paper, as well as this dataset using the Zenodo doi.</p>
Field measurement data for the mangroves bordering the lagoons of La Mancha and El Llano, Mexico
<p><span>Between</span><span> 27 June </span><span>and</span><span> 13 July 2022, a </span><span>total</span><span> </span><span>of</span><span> 11 </span><span>f</span><span>ield plot</span><span>s were investigated, where</span><span> </span><span>six</span><span> plots were located at </span><span>El Llano</span><span> lagoon, and </span><span>five</span><span> at </span><span>La Mancha</span><span> lagoon. </span><span>Plot </span><span>size</span><span> </span><span>varied in relation to stand density. In the </span><span>l</span><span>agoon of </span><span>El</span><span> </span><span>L</span><span>lan</span><span>o,</span><span> </span><span>three</span><span> plots of 10 × </span><span>1</span><span>0 m</span><span> </span><span>were delimited in the west of the lagoon and </span><span>three plots of the same size</span><span> on the east, neighbouring a system </span><span>o</span><span>f stabilized dunes. </span><span>In La Mancha</span><span> lagoon</span><span>, </span><span>two</span><span> plots of </span><span>1</span><span>0 × </span><span>1</span><span>0 m</span><span> and two 15</span><span> × </span><span>15</span><span> m</span><span> subplots of 30</span><span> × </span><span>30</span><span> m</span><span> permanent plots located in the north, and one plot of 2</span><span>0 × </span><span>2</span><span>0 m</span><span> </span><span>for large <em>R. mangle</em> trees</span><span> were sampled in the southeast of the lagoon. </span><span>Species id, stem diameter (cm) at 1.3 m from ground surface, and tree height (m) were recorded within each plot</span><span>. Additionally,</span><span> trunk diameter at lowest living branch, canopy width and length in the case of shrubs or young trees, and diameter above the highest prop root in the case of <em>R. mangle </em>were also recorded.</span></p>
Supporting data set for: Three-dimensional Configuration of Induced Magnetic Fields around Mars
<p>Supplementary data to reproduce figures for: Three-dimensional Configuration of Induced Magnetic Fields around Mars</p>
more data for "High-Latitude Electrodynamics Specified in SAMI3 Using AMPERE Field-Aligned Currents"
<p>Potential maps derived from AMPERE field-aligned current data and SAMI3 conductances</p>
Raw data for Reservoir computing on silicon platform with a ferroelectric field-effect transistor
<p>Raw data of publication "Reservoir computing on silicon platform with a ferroelectric field-effect transistor"</p>
Data set for phase-field studies of K-feldspar dissolution through etch-pit formation
<p>The numerical data in this repository consists of the simulation data of K-feldspar dissolution through etch-pit formation. The simulations were performed using the software package named "Pace3D".</p> <p>The data is organized, the way it appears in the figures (only, those figures, where simulation data is rquired) in the manuscript and the folders are named accordingly.</p> <ul> <li>The intermediate growth stage simulation data were translated from Pace3D output data format to VTK data format. Using open-source software tools such as Paraview, the VTK files can be examined. Each subfolder's data files are likewise compressed (*.gz file extension). Data must be decompressed for visualization (e.g. with gzip, 7zip).</li> </ul>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.