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13,017 results for “Positionning”
Data for: Positive impact of postfire environment on bumble bees not explained by habitat variables in a remote forested ecosystem
<p>Bumble bees are important pollinators in temperate forested regions where fire is a driving force for habitat change, and thus understanding how these insects respond to fire is critical. Previous work has shown bees are often positively affected by the post-fire environment, with burned sites supporting greater bee abundance and diversity, and increased floral resources. The extent to which fire impacts variation in bumble bee site occupancy is not well understood, especially in higher latitude regions with dense, primarily coniferous forests. Occupancy models are powerful tools for biodiversity analyses, as they separately estimate occupancy probability (likelihood that a species is present at a particular location) and detection probability (likelihood of observing a species when it is present). Using these models, we tested whether bumble bee site occupancy is higher in burned locations as a result of the increase in canopy openness, floral species richness, and floral abundance. We quantified the impact of fire, and associated habitat changes, on bumble bee species' occupancy in an area with high wildfire frequency in British Columbia, Canada. The burn status of a site was the only significant predictor for determining bumble bee occurrence (with burned sites having higher occupancy); floral resource availability and canopy openness only impacted detection probability (roughly, sample bias). These findings highlight the importance of controlling for the influence of habitat on species detection in pollinator studies and suggest that fire in this system changes the habitat for bumble bees in positive ways that extend beyond our measurements of differences in floral resources and canopy cover.</p>
Text-fig. 1. Lithostratigraphic scheme for Most Basin (edited according to Kvaček et al. 2019 and Hilgen et al. 2012) with fossiliferous horizons of Holešice and Libkovice members in its west part. Stratigraphic position of fish remnants is highlighted. in New Ichthyofauna From The Holešice And Libkovice Members In The Western Part Of Most Basin (Early Miocene), The Czech Republic
Text-fig. 1. Lithostratigraphic scheme for Most Basin (edited according to Kvaček et al. 2019 and Hilgen et al. 2012) with fossiliferous horizons of Holešice and Libkovice members in its west part. Stratigraphic position of fish remnants is highlighted.
Urbanus and Cosgrove Nature Communications (2023) - scRNAseq fastq files GFP positive sample in Figure 2
<p>This dataset contains .fastq files for the GFP negative sample in the scRNAseq dataset used in Figures 2. For any questions about this dataset please contact Leila Perie (leile.perie@curie.fr)</p>
A 5 m multi-scale topographic position color composite (MTPCC) across France
<p>The multi-scale topographic position color composite (MTPCC) describes the position of a pixel relative to its neighborhood at several spatial scales. It was derived from the national airborne DTM (RGE ALTI ®) at 5 m spatial resolution, which is available from the website of the French National Geographic Institute (IGN) (<a href="https://geoservices.ign.fr/">https://geoservices.ign.fr/</a>).</p> <p>Dataset includes:</p> <ul> <li>280 GeoTIFF raster files (MTPCC_000.tif) projected in the French Lambert-93 system (EPSG code 2154), each file corresponding to a 50 x 50 km tile. The number indicates the tile of interest ;</li> <li>1 vector tile index at Google Earth format (tile_index.kmz) showing the location of each tile. This file has been created to facilitate download layer only on area of interest.</li> </ul> <p>To reduce storage space and download time, each raster file has been packed at 7-Zip freeware format.</p> <p>A complete description of the dataset can be found in Panhelleux, L., Rapinel, S., Lemercier, B., Gayet, G., Hubert-Moy, L., 2023. A 5 m dataset of digital terrain model derivatives across mainland France. Data in Brief 109369. https://doi.org/10.1016/j.dib.2023.109369</p>
Position Measurement of a Levitated Nanoparticle via Interference with Its Mirror Image
<p>Interferometric methods for detecting the motion of a levitated nanoparticle provide a route to the quantum ground state, but such methods are currently limited by mode mismatch between the reference beam and the dipolar field scattered by the particle. Here we demonstrate a self-interference method to detect the particle’s motion that solves this problem. A Paul trap confines a charged dielectric nanoparticle in high vacuum, and a mirror retro-reflects the scattered light. We measure the particle’s motion with a sensitivity of 1.7×10−12  m/√Hz, corresponding to a detection efficiency of 2.1%, with a numerical aperture of 0.18. As an application of this method, we cool the particle, via feedback, to temperatures below those achieved in the same setup using a standard position measurement.</p>
FIG. 6 in Septonema lohmanii G. Delgado & O. Koukol, sp. nov., a new species in Mytilinidiales (Dothideomycetes) and the phylogenetic position of S. fasciculare (Corda) S. Hughes
FIG. 6. — Septonema fasciculare (Corda) S. Hughes (MUCL 8886) in culture (MEA): A, colonies after 1 month. Herbarium specimen; B, colonies on natural substrate; C, D, conidiophores, conidiogenous cells and conidia; E, F, conidia. Ibid. (IMI 84944a); G, colonies on natural substrate; H, J, conidia; I, conidiophores, conidiogenous cells and conidia. Septonema secedens (IMI 9939); K, colonies on natural substrate. L, M, conidia. Ibid. (IMI 25538a); N, conidiophore, branches and conidia. Scale bars: B, G, 200 μm; K, 500 μm; C-F, H-J, L-M, 10 μm; N, 20 μm.
FIG. 5 in Septonema lohmanii G. Delgado & O. Koukol, sp. nov., a new species in Mytilinidiales (Dothideomycetes) and the phylogenetic position of S. fasciculare (Corda) S. Hughes
FIG. 5. — Septonema fasciculare (Corda) S. Hughes (MUCL 8886, herbarium specimen): A, conidiophores, ramoconidia and conidia in chains; B, conidia. Scale bar: 20 μm.
FIG. 3. — Septonema lohmanii G. Delgado & O in Septonema lohmanii G. Delgado & O. Koukol, sp. nov., a new species in Mytilinidiales (Dothideomycetes) and the phylogenetic position of S. fasciculare (Corda) S. Hughes
FIG. 3. — Septonema lohmanii G. Delgado & O. Koukol,sp.nov.(BPI 910175, holotype = CBS 141174).On natural substrate:A, conidiophores,branches and conidia.In culture (MEA); B, colony after 21 days; C, D, conidiophores,branches and conidia; E, hyphal segment showing warts.Ibid. (PRC 4117,paratype); F, colony on natural substrate; G, conidiophores, branches and conidia; H, conidia. Scale bars: A, 20 μm; C-E, G-H, 10 μm; F, 200 µm.
FIG. 2. — Septonema lohmanii G. Delgado & O in Septonema lohmanii G. Delgado & O. Koukol, sp. nov., a new species in Mytilinidiales (Dothideomycetes) and the phylogenetic position of S. fasciculare (Corda) S. Hughes
FIG. 2. — Septonema lohmanii G. Delgado & O. Koukol, sp. nov. (BPI 910175, holotype): A, conidiophores, branches and conidia; B, acute apices of young co- nidiophores and branches. Scale bars: 20 μm.
FIG. 4 in Septonema lohmanii G. Delgado & O. Koukol, sp. nov., a new species in Mytilinidiales (Dothideomycetes) and the phylogenetic position of S. fasciculare (Corda) S. Hughes
FIG. 4. — Phylogenetic tree inferred from Bayesian and ML analyses of concatenated ITS-LSU sequence data showing the placement of Septonema fasciculare (Corda) S. Hughes within the family Venturiaceae (Venturiales, Dothideomycetes). Numbers above branches represent Bayesian posterior probabilities PP>0.95 followed by ML bootstrap support values BS≥90 %. The studied strain MUCL 8886 is highlighted in bold.
FIG. 1 in Septonema lohmanii G. Delgado & O. Koukol, sp. nov., a new species in Mytilinidiales (Dothideomycetes) and the phylogenetic position of S. fasciculare (Corda) S. Hughes
FIG. 1. — Phylogenetic tree inferred from Bayesian and ML analyses of concatenated LSU-EF1-α sequence data showing the placement of Septonema lohmanii G. Delgado & O. Koukol, sp. nov. within Mytilinidiales and related orders in Dothideomycetes. Numbers above branches represent Bayesian posterior probabilities PP>0.95 followed by ML bootstrap support values BS≥90%. Strains belonging to the new taxon are highlighted in bold.
Aggression and spatial positioning of kin and non-kin fish in social groups
<p>Group-living animals are faced with the challenge of sharing space and local resources amongst group members who may be either relatives or non-relatives. Individuals may reduce the inclusive fitness costs they incur from competing with relatives by either reducing their levels of aggression towards kin or by maintaining physical separation between kin. In this field study, we used the group-living cichlid <em>Neolamprologus</em> <em>multifasciatus</em> to examine whether within-group aggression is reduced among group members that are kin and whether kin occupy different regions of their group's territory to reduce kin competition over space and local resources. We determined the kinship relationships among cohabiting adults via microsatellite genotyping and then combined these with spatial and behavioural analyses of groups in the wild. We found that aggressive contests between group members declined in frequency with spatial separation between their shelters. Female kin did not engage in aggressive contests with one another, whereas non-kin females did, despite the fact these females lived at similar distances from one another on their groups' territories. Contests within male-male and male-female dyads did not clearly correlate with kinship. Non-kin male-male and male-female dyads lived at more variable distances from one another on their territories than their corresponding kin dyads. Together, our study <span>indicates that contests among group members can be mediated by relatedness in a sex-dependent manner. We also suggest that spatial relationships can play an important role in determining the extent to which group members compete with one another.</span></p>
Data for: Position in the plant size hierarchy is not heritable
<p><span>The rate of fitness evolution is largely determined by the amount of genetic variation for fitness in the population. In many plant populations, a few large individuals often occur alongside many more, smaller individuals. In annual plants, size is highly correlated with fitness. The contribution of genetic variation to position in the plant size hierarchy has not been investigated. We genotyped individuals at opposing positions in the plant size distribution in a natural population of the annual plant <em>Impatiens</em> <em>capensis</em> (Jewelweed). No significant genetic variation for position in the size hierarchy was detected when population structure was accounted for. This result suggests that the rate of evolution for increased plant fitness is constrained by low levels of standing genetic variation.</span></p>
The imbalance of wanting and liking contribute to a bias of internal attention towards positive consequences of tobacco smoking
<p>Data set used for the publication entitled "<strong>The imbalance of wanting and liking contribute to a bias of internal attention towards positive consequences of tobacco smoking</strong>".</p> <p>Variable names:</p> <p>sex: gender of respondent; classes: smoker profile; attempt: quit attempt in the past 12 months; imoportance: importance attributed to quit smoking; plan: whether they plan to quit smoking; prob1-prob3: how likely they will not smoke (1) within a year, (2) within 5 years, (3) within 10 years; time: when they plan to quit; nicotine_dependence: Fagerstöm score; smoking_freq: frequency of smoking; smokng_quantity: number of cigarettes on a day they smoke; wb: wanting-before; wd: wanting-during; wa: wanting-after; lb:liking-before; ld: liking-during; la: liking-after; ist-before: wd minus ld; ist_during: wd-ld; ist_after: wa-la; i1-14: importance scores of smoking consequences; regret: regret about start smoking; ease: assumed difficulity of quitting; environment: amont of smokers around; people: how much smoking bothers others around.</p> <p>For more info please email domonkos.file@gmail.com </p>
Supplemental data for: A bibliometric assessment of the incidence of amyloid-Eszett (Aß), a false positive of amyloid-beta (Aβ), in the neurodegenerative disease literature
<p>One claimed reason for the development of Alzheimer’s disease (AD), a prominent neurodegenerative disease, is the extracellular aggregation of amyloid-beta (Aβ). A linguistic or formatting error has resulted in the misrepresentation of the Greek letter β with the German letter Eszett (ß), resulting in the formation of a non-existent compound, amyloid-Eszett (Aß). These datasets offer a quantified appreciation of the AD-related literature, carrying a mention of this false positive in the title, abstract and keywords of papers indexed in the Web of Science Core Collection and Scopus. Also, as a curiosity given the popularity of this large language model, we asked the questions to ChatGPT. This AI chatbot developed by OpenAI was able to recognize Eszett as a linguistic or typographic error, within this context, recognizing Aß and Aβ as equals. This erroneous substitution of a Greek letter (in Aβ) by a German one (Aß), despite giving a non-existent compound, will likely not change the underlying scientific conclusions of the affected papers, although errata might be useful to enlighten others, including metadata managers and journal copyeditors, so as not to repeat the same mistake.</p>
Figure 1. Nandeva fittkaui Cranston, putative larva. a. Antenna, b. Labrum, c. Mandible ventral, c. Mandible ventral, e in AN ENIGMATIC CHIRONOMIDAE (DIPTERA): FIRST LARVAL DESCRIPTION FOR NANDEVA WIEDENBRUG, REISS AND FITTKAU AND EVIDENCE FOR PHYLOGENETIC POSITION IN TANYTARSINI Abstract
Figure 1. Nandeva fittkaui Cranston, putative larva. a. Antenna, b. Labrum, c. Mandible ventral, c. Mandible ventral, e. Mentum, with teeth enhanced, f. Mentum with ventromental plates enhanced.
Figure 2 in AN ENIGMATIC CHIRONOMIDAE (DIPTERA): FIRST LARVAL DESCRIPTION FOR NANDEVA WIEDENBRUG, REISS AND FITTKAU AND EVIDENCE FOR PHYLOGENETIC POSITION IN TANYTARSINI Abstract
Figure 2. Bayesian dated tree for Tanytarsini, 'Pseudochironomini', terminals reduced from Krosch et al. (submitted 2019). Above node, black # Support statistics. * - maximum Bayesian posterior probability (1.00), - = maximum bootstrap (100),.xx/yy Bayesian posterior probability / bootstrap value. Below node, red # is mean date in Ma (million years before present). ........ indicates attenuated distance.
Lung nodule CT false positive reduction
<p>This data set is part of the public development data for the <a href="http://auc23.grand-challenge.org/">2023 Automated Universal Classification Challenge</a> (AUC23). The data set concerns the classification of lung nodules on screening thoracic computed tomography (CT) scans and was derived from the <a href="https://luna16.grand-challenge.org/Data/">2016 Lung Nodule Analysis (LUNA) challenge</a>. The data set was previously introduced and described by <a href="https://www.sciencedirect.com/science/article/pii/S1361841517301020?via%3Dihub">Setio et al. (2017)</a> and no images or patient information were added. Only the "false positive reduction" track was considered, where a provided set of nodule candidates should be classified. Data was restructured in compliance with the <a href="https://auc23.grand-challenge.org/">AUC23</a> challenge format. The data set was collected from the largest publicly available reference database for lung nodules: <a href="https://wiki.cancerimagingarchive.net/pages/viewpage.action?pageId=1966254">The Lung Image Database Consortium image collection</a>.</p> <p>Images are 3D tensors:</p> <ul> <li>0: 3D axial screening CT scan (cropped to candidate nodule's region of interest)</li> </ul> <p>Classification labels:</p> <ul> <li>0: Is a nodule</li> <li>1: Is not a nodule</li> </ul> <p>Folder structure:</p> <p>imagesTr (root folder with all patients and studies)<br> ├── LUNA16_0000_0000.mha (axial CT imaging for nodule 0000)<br> ├── LUNA16_0000_0002.mha (axial CT imaging for nodule 0002)<br> ├── ...<br> </p> <p>Please cite the following article if you are using the <a href="https://luna16.grand-challenge.org/Data/">2016 Lung Nodule Analysis (LUNA) challenge</a> false positive reduction track data set:</p> <pre><code>Setio AAA, Traverso A, de Bel T, Berens MSN, Bogaard CVD, Cerello P, Chen H, Dou Q, Fantacci ME, Geurts B, Gugten RV, Heng PA, Jansen B, de Kaste MMJ, Kotov V, Lin JY, Manders JTMC, Sóñora-Mengana A, García-Naranjo JC, Papavasileiou E, Prokop M, Saletta M, Schaefer-Prokop CM, Scholten ET, Scholten L, Snoeren MM, Torres EL, Vandemeulebroucke J, Walasek N, Zuidhof GCA, Ginneken BV, Jacobs C. Validation, comparison, and combination of algorithms for automatic detection of pulmonary nodules in computed tomography images: The LUNA16 challenge. Med Image Anal. 2017 Dec;42:1-13. doi: 10.1016/j.media.2017.06.015. Epub 2017 Jul 13. PMID: 28732268.</code></pre> <p> </p>
Archery eye position data
<p>This file contains data from Experiment 1 and Experiment 2 of "Effect of Binocular Vision during Target Shooting in Archery".</p> <p>In Experiment 1, each subject's arrow scores were recorded, and in Experiment 2, each subject's eye movements were recorded.</p>
Large positive ecological changes of small urban greening actions
<p><strong>Updated data and R codes associated with our article <em>Large positive ecological changes of small urban greening actions</em>:</strong></p> <p><strong>Ecological Solutions and Evidence</strong></p> <p><strong>Abstract</strong></p> <p>The detrimental effects of human-induced environmental change on people and other species are acutely manifested in urban environments. While urban greenspaces are known to mitigate these effects and support functionally diverse ecological communities, evidence of the ecological outcomes of urban greening remains scarce. We use a longitudinal observational design to provide empirical evidence of the ecological benefits of greening actions. We show how a small greening action quickly led to large positive changes in the richness, demographic dynamics, and network structure of a depauperate insect community. We demonstrate how large ecological benefits may be derived from investing in small greening actions and how these contribute to bring indigenous species back to greenspaces where they have become rare or locally extinct. Our findings provide crucial evidence that support best practice in greenspace design and contribute to re-invigorate policies aimed at mitigating the negative impacts of urbanisation on people and other species. </p>
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.