Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
13,017
datasets available to search
ShareScore release 0.9.0
Dataset results
13,017 results for “Positionning”
Data supporting On the step type of continuous propagating positive leader in laboratory-scale long spark discharges
<p>The data supports the manuscript entitled "On the step type of continuous propagating positive leader in laboratory-scale long spark discharges". The *.txt file contains the applied voltage waveform and discharge current waveform. The*.doc file contains the data for Figure 5. The *.rar file contains the high-speed video frames, and can be decompressed and opened. The data can be used freely for scientific purposes with appropriate citation.</p>
Phenotypic plasticity and the leaf economics spectrum: plasticity is positively associated with specific leaf area
<p>Phenotypic plasticity is a key mechanism by which plants respond to changing or heterogeneous conditions. Efforts to predict phenotypic plasticity across plant species have mainly focused on environmental variability or abiotic conditions, i.e., site characteristics. However, the considerable variation in phenotypic plasticity within sites calls for alternative approaches. Different functional groups are thought to differ in their plasticity levels. Further, traits such as leaf specific area (SLA), leaf area (LA) and maximum photosynthetic rate (Amax) reflect central aspects of plant strategies. Lower values of SLA, LA and Amax are indicative of a resource-conservative strategy, which is thought to be associated with lower phenotypic plasticity. We used meta-analytical data to test whether plant functional group (herbs, woody deciduous and woody evergreens) and SLA, LA and Amax are associated with phenotypic plasticity in four trait types: biomass allocation, plant size, leaf morphology and physiology. We obtained data from 168 plant species and accounted for phylogenetic relationships in all analyses. We found a positive relationship between SLA and phenotypic plasticity in biomass allocation, leaf morphology and physiology, with differences across functional groups. In contrast, there was no evidence of greater plasticity in plant size in species with higher SLA; rather the opposite was true for woody evergreens. Amax and LA showed similar, but less consistent associations with phenotypic plasticity. Our results show the potential of building predictive frameworks for phenotypic plasticity based on easily measured plant functional characteristics. Results also provide insights into plant strategies and suggest the existence of potential compromises: resource-conservative, low-SLA species tend to be more stress-tolerant but may be less able to cope with variable conditions due to their generally lower phenotypic plasticity. Further studies are needed to explore the mechanisms and the potential implications of this association.</p>
Creating Comparability among European Neighbourhoods to Enable the Transition of District Energy Infrastructures towards Positive Energy Districts
<p>The aim of the this raster file is to allow comparability of districts across Europe, to support energy transformation in urban areas. Comparability will allow to transfer knowledge between district energy renovation projects. This dataset combines different raster files from the <a href="https://gitlab.com/hotmaps">Hotmaps project</a>.<br> The dataset combines data from <a href="https://gitlab.com/hotmaps/heat/heat_res_curr_density/-/tree/master">Heat density</a>, <a href="https://gitlab.com/hotmaps/heat/heat_res_curr_density/-/tree/master">Total Gross Floor Area</a>, <a href="https://gitlab.com/hotmaps/gfa_res_curr_density">Residential Gross Floor Area</a>. These three dataset act as a proxy to Heat Demand, Floor Space Index and Share of Residential Gross Floor Area. Further description can be found in the paper "Creating comparability among European neighbourhoods to enable district energy infrastructure towards positive energy districts".</p>
Corresponding spreadsheet to the Paper 'Comparative analysis of pre-Covid19 child immunization rates across 30 European countries and identification of underlying positive societal and system influences'
<p>This study provides a macro-level societal and health system focused analysis of child vaccination rates in 30 European countries, exploring the effect of context on coverage. The importance of demography and health system attributes on health care delivery are recognized in other fields, but generally overlooked in vaccination. The analysis is based on correlating systematic data built up by the Models of Child Health Appraised (MOCHA) Project with data from international sources, so as to exploit a one-off opportunity to set the analysis within an overall integrated study of primary care services for children, and the learning opportunities of the ‘natural European laboratory’. The descriptive analysis shows an overall persistent variation of coverage across vaccines with no specific vaccination having a low rate in all the EU and EEA countries. However, contrasting with this, variation between total uptake per vaccine across Europe suggests that the challenge of low rates is related to country contexts of either policy, delivery, or public perceptions. Econometric analysis aiming to explore whether some population, policy and/or health system characteristics may influence vaccination uptake provides important results - GDP per capita and the level of the population’s higher education engagement are positively linked with higher vaccination coverage, whereas mandatory vaccination policy is related to lower uptake rates. The health system characteristics that have a significant positive effect are a cohesive management structure; a high nurse/doctor ratio; and use of practical care delivery reinforcements such as the home-based record and the presence of child components of e‑health strategies.</p>
Positional errors in species distribution modelling are not overcome by the coarser grains of analysis
<p>The performance of species distribution models is known to be affected by the analysis grain and the positional error of species occurrences. Coarsening of the spatial analysis grain has been suggested to compensate for positional errors. Nevertheless, this way of dealing with positional errors has never been thoroughly tested. With increasing use of fine-scale environmental data in predictive models developed for conservation and climate change studies it is increasingly important to test this assumption. Species distribution models using fine-scale environmental data are more likely to be negatively affected by positional error as the inaccurate species occurrences might easier end up in unsuitable environment, which can result in inappropriate conservation actions.</p> <p>Here, we examine the trade-offs between positional error and analysis grain and provide recommendations for best practice. We generated virtual species using tree canopy height, topography wetness index, and altitude derived from LiDAR point clouds at 5 x 5 m fine-resolution. We simulated the positional error in the range of 5 m to 99 m and evaluated the effects of several spatial grains in the range of 5 m to 500 m. In total, we assessed 49 combinations of positional accuracy and analysis grain. We used three common modelling techniques (MaxEnt, BRT and GLM) and four discrimination metrics to evaluate model performance (Sørensen index, overprediction and underprediction rate, AUC and TSS).</p> <p>We found that model performance decreased with increasing positional error in species occurrences and coarsening of the analysis grain. Most importantly, we showed that coarsening the analysis grain to compensate for positional error did not improve model performance. Our results reject coarsening of the analysis grain as a solution to address the negative effects of positional error on model performance.</p> <p>We recommend fitting models with the finest possible analysis grain (i.e., depending on data availablity) even when available species occurrences suffer from positional errors. If there are significant positional errors in species occurrence data, users are unlikely to benefit from making additional efforts to obtain higher resolution environmental data unless they also minimize the positional errors of species occurrences.</p>
Positive effects of fast growth on locomotor performance in pelagic fish juveniles
<p><span>Many laboratory experiments on aquatic vertebrates that inhabit closed water or coastal areas have highlighted negative effects of fast growth on swimming performance. Nonetheless, field studies on pelagic fishes have provided evidence of survival advantages of faster growing individuals. To reconcile this contradiction, we examined the relationship between growth rate and swimming performance as a continuous function for juveniles of chub mackerel (<em>scomber japonicus</em>) using 3D tracking analysis. For experiments, 20, 24, 27, and 30 days post-hatch individuals within the size range of 14.5–25.3 mm were used. We found that the growth–swimming (burst speed) relationship in chub mackerel was substantially positive and it was supported by morphological traits such as muscle area, which were also positively related with growth rate. This finding is consistent with field observations showing selective survival of fast-growing individuals of this species, reconciling the current contradiction between laboratory experiments and field observations. A dome-shaped quadratic curve described the relationship between growth rate and burst speed better than a linear or cubic function, suggesting that growth may trade off with swimming performance, as reported in many previous studies, when it is extremely fast. These results, obtained from the rarely tested offshore species, strongly suggests the importance of experimental verification using animals that inhabit various types of habitats in understanding the principles underlying the evolution of growth–locomotor relationship.</span></p>
Supplementary Files - Transcriptomic analysis of CPM-positive hiPSCs-derived liver progenitor cells in a microfluidic device shows zonation-like patterns.
<p>Supplementary Files for the paper intitled Transcriptomic analysis of CPM-positive hiPSCs-derived liver progenitor cells in a microfluidic device shows zonation-like patterns. </p>
Raw data for the manuscript entitled "Forest age and topographic position jointly shape the species richness and composition of vascular plants in karstic habitats"
<p>Doline surveys from the Mecsek Mountains, Hungary. Transects were established with north to south orientation across each doline, traversing their deepest point. Transects began and ended on doline rims, and consisted of 1 m  × 1 m plots spaced at 2 m intervals (94, 89, 90 and 99 plots in the different forest age classes, respectively; 372 plots in total). We recorded the presence/absence data of shrubs and herbs in each plot. Fieldwork was carried out between 2007 and 2019 from June to August, at the peak of the growing season.</p>
Supplementary figure: No evidence of any wild animal samples positive for SARS-CoV-2 RNA or antibodies were found in China.
<p>A compilation of results of wildlife sampling from the Huanan market and from China showing no evidence of positive animal for SARS-CoV-2 in China</p>
Older populations of the invader Solidago canadensis exhibit stronger positive plant-soil feedbacks and competitive ability in China
<p><strong>PREMISE</strong></p> <p>The enemy release hypothesis predicts that release from natural enemies, including soil-borne pathogens, liberates invasive plants from a negative regulating force. Nevertheless, invasive plants may acquire novel enemies and mutualists in the introduced range, which may cause variable effects on invader growth. However, how soil microorganisms may influence competitive ability of invasive plants along invasion chronosequences has been little explored.</p> <p><strong>METHODS</strong></p> <p>Using the invasive plant <em>Solidago canadensis</em>, we tested whether longer residence times are associated with stronger negative plant-soil feedbacks and thus weaker competitive abilities at the individual level. We grew S. canadensis individuals from 36 populations with different residence times in competition versus no competition and in three different types of soils: (1) conspecific rhizospheric soils, (2) soil from uninvaded patches, and (3) sterilized soil. For our competitor treatments, we constructed synthetic communities of four native species <em>Bidens parviflora, Solanum nigrum, Kalimeris indica,</em> and <em>Mosla scabra</em>, which naturally co-occur with <em>S. canadensis</em> in the field.</p> <p><strong>RESULTS</strong></p> <p>Solidago canadensis populations with longer residence times experienced stronger positive plant-soil feedbacks and had greater competitive responses (i.e., produced greater above-ground biomass and grew taller) in conspecific rhizospheric soils than in sterilized and uninvaded soils. Moreover, <em>S. canadensis</em> from older populations significantly suppressed above-ground biomass of the native communities in rhizospheric and uninvaded soils but not in sterilized soil.</p> <p><strong>CONCLUSIONS</strong></p> <p>The present results suggest that older populations of <em>S. canadensis</em> experience stronger positive plant-soil feedback, which may enhance their competitive ability against native plant communities. </p>
Phylogenetic position of Centroglossa and Dunstervillea (Ornithocephalus clade: Oncidiinae: Orchidaceae) based on molecular and morphological data
<p><span>Even though the monophyly of the <em>Ornithocephalus </em>clade (Oncidiinae) is currently well defined, the systematic positioning of <em>Centroglossa </em>and <em>Dunstervillea </em>remains obscure in the clade due to the absence in previous phylogenetic studies. <em>Centroglossa </em>has a very similar habit and is indistinguishable from <em>Zygostates</em>, whereas <em>Dunstervillea </em>has as its main characteristic the calcarate labellum, also found in <em>Centroglossa</em>. We clarify the systematic and phylogenetic positioning of Centroglossa and Dunstervillea in the <em>Ornithocephalus </em>clade (OC) through analysis of maximum likelihood, <em>Bayesian </em>inference, and maximum parsimony from molecular data (nrITS and <em>matK </em>cpDNA) and morphology. Our results indicate that Dunstervillea is phylogenetically close to <em>Eloyella</em>; both genera have a psigmoid habit, single-sided and flattened leaves, floral perianth with the same coloring, petals with entire margins, and a short rostellum. <em>Centroglossa </em>appears as a subclade within <em>Zygostates</em>. In addition to several homoplastic features, these two genera have the dorsal position of viscidium as a synapomorphy. The calcarate labellum, common to <em>Centroglossa </em>and <em>Dunstervillea</em>, originated more than once in the OC. Based on the phylogenetic results, we propose the nomenclatural changes to include <em>Dunstervillea </em>in <em>Eloyella </em>and Centroglossa in Zygostates. Lectotypes are indicated to <em>Centroglossa macroceras </em>and <em>C</em>. <em>glaziovii</em>.</span></p>
Positive and Negative Feedback from the Supernova remnant IC443: first results from SHREC
<p>Supernova remnants (SNRs) drive large-scale shocks that locally enhance the density of the surrounding material but also inject vast amounts of energy and momentum that largely perturb and disperse the Interstellar Medium (ISM). The interplay between these two effects is considered paramount in regulating the star formation efficiency in galaxies. However, how SNRs affect the conditions of density and temperature of the ISM is not well constrained from an observational point of view. In this poster, I present our exploratory large single-dish observing program SHREC, aimed to observe the molecular shock tracer SiO(2-1) toward a sample of 30 SNRs known to be interacting with molecular clouds. I introduce the aim and technical aspects of SHREC and present the first results obtained toward the SNRs IC443. IC443 is a well known SNR, expanding into and interacting with a nearby toroidal molecular cloud. Toward the major site of interaction, known as clump G, we estimate the mass of the shocked gas to be 100 Msun. The shock driven by IC443 into this material enhances its density by a factor >10, to value consistent with those required to ignite star formation. Finally, we estimate that between 35-50% of the momentum injected by IC443 is transferred to the nearby molecular material. Our work therefore indicates that the molecular ISM is an important carrier of the SNR momentum and that the SNR-molecular cloud interaction play a crucial role in the regulating star formation in galaxies.</p>
THE POSITION OF THE AUTHOR AND THE FUNCTION OF THE NARRATOR IN THE STORY "THE MAN WITHOUT A HEAD" BY A. KAHKHOR
<p><em>This article discusses the position of the author and the function of the narrator in the story "The Man Without a Head" by A. Kahkhor. The author's skill in turning reality into fiction in the story, figurative means: the ability to use such artistic means as comparison, comparison, irony, the writer's ability to use the word, the function of the narrator in the structure of the story, his role in realizing the relationship between the student and the reader, introduction others, their place and significance in the structure of the work, the neutral and biased position of the narrator in the narrative genre, the importance of the method of conveying information to the reader reasonably and quickly in the formation of characters, that the events expected by the reader do not occur in the plot, the reader’s plot scientific conclusions are made about the importance the contrast method used in an image to make it appear true to text.</em></p>
Diaspore traits specialized to animal adhesion and sea current dispersal are positively associated with the naturalization of European plants across the World
<p>Understanding what drives non-native species naturalization (the establishment of a self-sustainable population outside its native range) is a central question in invasion science. Plants' capacity for long distance dispersal (LDD) is likely to influence the spread and naturalization of non-native species differently according to their introduction pathways. These pathways include intentional introductions (for economic use, e.g. for agriculture), unintentional introductions (e.g. seed contaminants), plant dispersal via human infrastructures (e.g. roads), and plant spread from an adjacent region where the species was previously introduced. Herein, we tested the relationship between sets of LDD traits (syndromes) of 10,308 European plant species and their global naturalization incidence (i.e. whether a species has become naturalized or not) and extent (i.e. the number of regions where a species has become naturalized) using the most comprehensive database of naturalized plants worldwide (GloNAF). Diaspore traits allowed the identification of four traditional LDD syndromes, namely those with specializations for dispersal by: wind (anemochorous), animal ingestion (endozoochorous), attached to animals (epizoochorous), and sea currents (thalassochorous). These evolutionary specializations have been historically interpreted by biologists even though actual dispersal is not always related to diaspore syndromes. We found that while epizoochorous and thalassochorous traits are positively associated with global plant naturalization incidence, anemochorous and endozoochorous traits show a negative relationship. Species´ residence time outside their native range, their economic use and presence of epizoochorous traits (such as hooks, hairs and adhesive substances) are positively associated with global naturalization extent. Furthermore, we found that plants' economic use reduces the influence of LDD syndromes on the naturalization incidence of intentionally introduced plants. While the success of non-native plants is influenced by a broad array of species- and context-specific factors, LDD syndromes play an important role in this context depending on the economic use of plants.</p>
Joint coding of visual input and eye/head position in V1 of freely moving mice dataset
<p><span>Visual input during natural behavior is highly dependent on movements of the eyes and head, but how information about eye and head position is integrated with visual processing during free movement is unknown, since visual physiology is generally performed under head-fixation. To address this, we performed single-unit electrophysiology in V1 of freely moving mice while simultaneously measuring the mouse's eye position, head orientation, and the visual scene from the mouse's perspective. From these measures, we mapped spatiotemporal receptive fields during free movement based on the gaze-corrected visual input. Furthermore, we found a significant fraction of neurons tuned for eye and head position, and these signals were integrated with visual responses through a multiplicative mechanism in the majority of modulated neurons. These results provide new insight into coding in mouse V1, and more generally provide a paradigm for performing visual physiology under natural conditions, including active sensing and ethological behavior.</span></p> <p><span></span></p>
Text-fig. 2. Schematic map of the Prague Basin with position of the Loděnice – vinice locality. in Early Complex Tiering Pattern: Upper Ordovician, Barrandian Area, The Czech Republic
Text-fig. 2. Schematic map of the Prague Basin with position of the Loděnice – vinice locality.
Figs 1, 2 in Systematic position of the genus Vologdoptera Aristov, 2009 (Orthoptera: Pruvostitidae) from Upper Permian of Russia
Figs 1, 2. Forewing of Vologdoptera maculata Aristov, 2009. 1 – holotype PIN, No
Figs. 1–5. Carcina spp., male genitalia. 1–2 – C. luridella, 3–5 – C in To the taxonomic position of Lecithocera luridella Christoph and Carcina Hübner in the system of oecophoroid moths (Lepidoptera: Oecophoridae sensu lato)
Figs. 1–5. Carcina spp., male genitalia. 1–2 – C. luridella, 3–5 – C. quercana: 1, 3 –
Fig. 6 in To the taxonomic position of Lecithocera luridella Christoph and Carcina Hübner in the system of oecophoroid moths (Lepidoptera: Oecophoridae sensu lato)
Fig. 6. Phylogenetic relationships of Oecophoroid taxa inferred using Neighbor-joining
Figures 42-43. Primary courtship positions for P. pacosauritus. Figure 42. Stationary position. Figure 43 in Description of Phidippus pacosauritus sp. nov. (Salticidae: Salticinae: Dendryphantini: Dendryphantina), with a reanalysis of related species in the mystaceus group
Figures 42-43. Primary courtship positions for P. pacosauritus. Figure 42. Stationary position. Figure 43. Lateral display position. Photo credits: David Hill.
ScienceDex guides
Understand access before you commit
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.