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2,142 results for “by contact”
Contact Tracing is Associated with Lower COVID-19 Case Fatality Rates: Evidence from 40 countries
<p> </p> <p>Datasets represent data used in regression analysis.</p>
Data from: Insect adhesion on rough surfaces: analysis of adhesive contact of smooth and hairy pads on transparent micro-structured substrates
Insect climbing footpads are able to adhere to rough surfaces, but the details of this capability are still unclear. To overcome experimental limitations of randomly rough, opaque surfaces, we fabricated transparent test substrates containing square arrays of 1.4 µm diameter pillars, with variable height (0.5 and 1.4 µm) and spacing (from 3 to 22 µm). Smooth pads of cockroaches (Nauphoeta cinerea) made partial contact (limited to the tops of the structures) for the two densest arrays of tall pillars, but full contact (touching the substrate in between pillars) for larger spacings. The transition from partial to full contact was accompanied by a sharp increase in shear forces. Tests on hairy pads of dock beetles (Gastrophysa viridula) showed that setae adhered between pillars for larger spacings, but pads were equally unable to make full contact on the densest arrays. The beetles' shear forces similarly decreased for denser arrays, but also for short pillars and with a more gradual transition. These observations can be explained by simple contact models derived for soft uniform materials (smooth pads) or thin flat plates (hairy-pad spatulae). Our results show that microstructured substrates are powerful tools to reveal adaptations of natural adhesives for rough surfaces.
Data from: Estimation of the dispersal of a major pest of maize by cline analysis of a temporary contact zone between two invasive outbreaks
Dispersal is a key factor in invasion, and in the persistence and evolution of species. Despite the importance of estimates of dispersal distance, dispersal measurement remains a real methodological challenge. In this study, we characterized dispersal by exploiting a specific case of biological invasion, in which multiple introductions in disconnected areas lead to secondary contact between two differentiated expanding outbreaks. By applying cline theory to this ecological setting, we estimated σ, the standard deviation of the parent-offspring distance distribution, of the western corn rootworm, Diabrotica virgifera virgifera, one of the most destructive pests of maize. This species is currently invading Europe, and the two largest invasive outbreaks, in Northern Italy and Central Europe, have recently formed a secondary contact zone in Northern Italy. We identified vanishing clines at 12 microsatellite loci throughout the contact zone. By analyzing both the rate of change of cline slope and the spatial variation of linkage disequilibrium at these markers, we obtained two σ estimates of about 20 km.generation−1/2. Simulations indicated that these estimates were robust to changes in dispersal kernels and differences in population density between the two outbreaks, despite a systematic weak bias. These estimates are consistent with the results of direct methods for measuring dispersal applied to the same species. We conclude that secondary contact resulting from multiple introductions is very useful for the inference of dispersal parameters and should be more widely used in other species.
Data from: Dobzhansky-Muller incompatibilities, dominance drive, and sex-chromosome introgression at secondary contact zones: a simulation study
Dobzhansky-Muller (DM) incompatibilities involving sex chromosomes have been proposed to account for Haldane's rule (lowered fitness among hybrid offspring of the heterogametic sex) as well as Darwin's corollary (asymmetric fitness costs with respect to the direction of the cross). We performed simulation studies of a hybrid zone to investigate the effects of different types of DM incompatibilities on cline widths and positions of sex-linked markers. From our simulations, X-Y incompatibilities generate steep clines for both X-linked and Y-linked markers; random effects may produce strong noise in cline center positions when migration is high relative to fitness costs, but X- and Y-centers always coincide strictly. X-autosome and Y-autosome incompatibilities also generate steep clines, but systematic shifts in cline centers occur when migration is high relative to selection, as a result of a dominance drive linked to Darwin's corollary. Interestingly, sex-linked genes always show farther introgression than the associated autosomal genes. We discuss ways of disentangling the potentially confounding effects of sex biases in migration, we compare our results to those of a few documented contact zones, and we stress the need to study independent replicates of the same contact zone.
CoMix social contact data for Switzerland (2021-2022)
<p><a href="https://www.uhasselt.be/en/aparte-sites-partner-en/epipose/the-comix-study">CoMix</a> is a social contact survey that followed households across Europe throughout the COVID-19 pandemic (<a href="https://doi.org/10.1186/s12916-021-02133-y">Verelst et al., 2021</a>). In Switzerland, we conducted a total of 24 survey waves from 22 January 2021 to 19 May 2022. The market research company Ipsos MORI recruited a nationally representative sample of study participants using quota sampling based on age, gender, region, and work status through a combination of social media, web advertising, and email campaigns. The survey included adults aged 18 or above and parents (at least 18 years old) who completed the surveys on behalf of their children (<18 years old). For parents, quotas were set on region only. </p><p>Participants reported their social contacts made on the day prior to survey participation. A contact was defined as anyone who met the participant in person with whom at least a few words were exchanged or physical contact was made. The design of the survey is largely based on the POLYMOD study (<a href="https://doi.org/10.1371/journal.pmed.0050074">Mossong et al., 2008</a>). Further details about the study design and methodology have been published elsewhere (<a href="https://doi.org/10.1186/s12916-021-02133-y">Verelst et al., 2021</a>; <a href="https://doi.org/10.1186/s12879-023-08214-y">Wong et al., 2022</a>).</p>
FEM data sets for heat generation due to plastic deformation and the and associated contact temperature during a normal impact between an elastic-perfectly-plastic particle and a rigid surface.
<p>This dataset contains essential data from the Finite Element Method (FEM) model predicting heat generation due to plastic deformation during the normal impact of a deformable spherical particle and a rigid flat substrate. Part of this data was processed and featured in a publication of a journal article (https://doi.org/10.1016/j.ijimpeng.2023.104831). The following is the description of the data files and the associated figures in the original paper. </p><p>'Energy_Vy200_1200 .xlsx' and 'Temp_Vy200_1200 .xlsx' - data for the evolution of heat and nodal temperature, respectively for varying impact velocities. Data was used for Figs.5 -7 in the published paper.</p><p>'Energy_YM_5_1000.xlsx' and 'Temp_YM_5_1000.xlsx' - data for the evolution of heat and nodal temperature, respectively for varying Young moduli. Data was used for Figs. 8 and 9 in the published paper.</p><p>'Energy_YS_50_800.xlsx' , 'Temp_YS_50_800.xlsx' - data for the evolution of heat and nodal temperature, respectively for varying yield strengths. Data was used for Figs. 10 and 11 in the published paper.</p><p>'Energy_Den_500_8000.xlsx' , 'TempC_Den_500_8000.xlsx'- data for the evolution of heat and nodal temperature, respectively for varying densities. Data was used for Figs. 12 and 13 in the published paper.</p><p>'Temp_TC.xlsx' , 'Temp_HC.xlsx' - data for the evolution of nodal temperatures for varying thermal conductivity and specific heat capacities, respectively. Data was used for Figs. 14 -17 in the published paper.</p><p> </p><p> </p><p> </p><p> </p><p> </p>
Secondary contact, introgressive hybridization and genome stabilization in sticklebacks
<p>Variant data in vcf format and SNPEFF annotation related files for the manuscript "Secondary contact, introgressive hybridization and genome stabilization in sticklebacks".</p>
Figure 1 from: Lyapina MG, Tsanova-Savova SP, Nikolova MG, Vizeva ML, Momekov GT (2024) Gallates – toxicological data and a pilot study on the prevalence of contact sensitization. Pharmacia 71: 1-6. https://doi.org/10.3897/pharmacia.71.e120507
Figure 1 Patch testing technique.
dataset for Role of muzzle contact in the uptake of a novel food, triggered by wild immigrant vervet monkeys
<p>Dataset for preprint (https://doi.org/10.1101/2021.12.16.472640) and submission to eLife (not yet published).</p>
How to make contacts for converse ME measurements in liquid configuration
<p>In these slides, we show general schematics of the magneto-electric set-up for voltage control of magnetism in liquid configuration along with the real images of the samples.</p>
RIC-seq contacts in HeLa
<p>Contacts derived from HeLa RIC-seq <a href="https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE127188">data</a> by RIC-contacts <a href="https://github.com/smargasyuk/RNAcontacts">pipeline</a>.</p>
Data from: When virulence originates from nonagricultural hosts: evolutionary and epidemiological consequences of introgressions following secondary contacts in Venturia inaequalis
In pathogens, introgressions through secondary contacts between divergent populations from agricultural and nonagricultural disease reservoirs are expected to have crucial evolutionary and epidemiological implications. Despite the importance of this question for disease management, experimental demonstrations of these implications remain scarce. Recently, we identified a virulent population of the apple scab pathogen Venturia inaequalis that migrated from nonagricultural hosts to European domestic apple orchards. Here, we investigated the occurrence of gene flow between agricultural and nonagricultural populations sampled in two orchards, and thereafter its consequences on the pathogenicity of hybrids. Population genetic structure and demographic inferences based on the genotypes of 104 strains revealed a high amount of gene flow between the two populations in one orchard. In this site, mating between populations was made possible by the presence of a common host. Our results revealed an invasion of the virulent trait in the agricultural population; a main direction of introgression in hybrids from the agricultural to nonagricultural genetic backgrounds; and a population of hybrids with transgressive traits. We demonstrate a secondary contact with gene flow between divergent populations of pathogens. Our findings highlight evolutionary and epidemiological changes in pathogens and have concrete implications for sustainable disease management.
Inlists for paper: Simulating a stellar contact binary merger – I. Stellar models
<p>We study the initial conditions of a common envelope (CE) event resulting in a stellar merger. A merger’s dynamics could be understood through its light curve, but no synthetic light curve has yet been created for the full evolution. Using the smoothed particle hydrodynamics (SPH) code StarSmasher, we have created three-dimensional (3D) models of a 1.52 M<sub>⊙</sub> star that is a plausible donor in the V1309 Sco progenitor. The integrated total energy profiles of our 3D models match their initial one-dimensional (1D) models to within a 0.1 per cent difference in the top 0.1 M<sub>⊙</sub> of their envelopes. We have introduced a new method for obtaining radiative flux by linking intrinsically optically thick SPH particles to a single stellar envelope solution from a set of unique solutions. For the first time, we calculated our 3D models’ effective temperatures to within a few per cent of the initial 1D models, and found a corresponding improvement in luminosity by a factor of ≳10<sup>6</sup> compared to ray tracing. We let our highest resolution 3D model undergo Roche lobe overflow with a 0.16 M<sub>⊙</sub> point-mass accretor (<em>P</em> ≃ 1.6 d) and found a bolometric magnitude variability amplitude of ∼0.3 – comparable to that of the V1309 Sco progenitor. Our 3D models are, in the top 0.1 M<sub>⊙</sub> of the envelope and in terms of total energy, the most accurate models so far of the V1309 Sco donor star. A dynamical simulation that uses the initial conditions we presented in this paper can be used to create the first ever synthetic CE evolution light curve.</p>
Data generated by our developed theoretical asperity contact creep model
<p>The uploaded data was generated by our developed theoretical asperity contact creep model of interfacial friction for Geomaterials, including excel-style data and origin-style data.</p>
Simulation files for "How Charge Carrier Exchange between Absorber and Contact influences Time Constants in the Frequency Domain Response of Perovskite Solar Cells"
<p>MATLAB files, SETFOS .parx files for the manuscript "How Charge Carrier Exchange between Absorber and Contact influences Time Constants in the Frequency Domain Response of Perovskite Solar Cells"</p>
Contact data of Children in Belgium, Italy and Poland
<p>Social contact data focused on Children collected in 2023 in Belgium, Italy and Poland during school term and holiday term.</p>
Data of the article "Emergence of bidirectional cell laning from collective contact guidance"
<p>Data (datasets, images and video) that support the findings of the corresponding article (Lacroix et al., Emergence of bidirectional cell laning from collective contact guidance), and that are not in the Supplementary Material file.</p>
Time Course Comparison of Contact Lens Maintenance Systems for Hydrogel Lenses
ClinicalTrials.gov study NCT00732004. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Performance Evaluation of DAILIES® TOTAL1™ in First Time Contact Lens Wearers
ClinicalTrials.gov study NCT01494545. IPD Sharing: Not stated. Countries: 0. Publications: 0.
Characterization of the Edge of Soft Contact Lens and Its Interaction With Ocular Surface
ClinicalTrials.gov study NCT00707291. IPD Sharing: Not stated. Countries: 1. Publications: 0.
ScienceDex guides
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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.