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13,017 results for “Positionning”
WW1 firing position, Espoo, Finland
First World War type E firing position for four riflemen in base XXVIII:23 in [Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) land front defense line in Puustellinmäki, Espoo, Finland. The base was built in 1915 - 1918. The whole base contains: * 20 meters of thrench * 3 type E riflemen firing positions More info: * [Location in Google Maps](https://goo.gl/maps/3HoZhBf2voQDcAmm6) * [Wikipedia: Krepost Sveaborg](https://en.wikipedia.org/wiki/Krepost_Sveaborg) * [John Lagerstedt , Markku Saari: Krepost Sveaborg](http://www.novision.fi/viapori/eavaus.htm) * [Finnish Heritage Agency site info](https://www.kyppi.fi/to.aspx?id=112.1000007771) (only in finnish) Source: Objaverse 1.0 / Sketchfab
Monitoring mobility in older adults using a global positioning system (GPS) smartwatch and accelerometer: A validation study
<p><strong>Background</strong></p> <p>There is interest in identifying the most reliable method for detecting early mobility limitations. Accelerometry and Global Positioning System (GPS) could provide insight into declines in mobility, but few studies have used this multi-sensor approach to monitor mobility in older adults. </p> <p><strong>Methods</strong></p> <p>Thirty-two volunteers (66.2±6.3 years) agreed to participate in our validation study. We conducted two experiments to determine the validity of the TicWatch S2 and Pro 3 Ultra GPS models against the Qstarz receiver in measuring life-space mobility, trip frequency, duration, and mode. We also assessed the accuracy of the TicWatch in measuring step count and agreement with the ActiGraph wGT3X-BT for activity counts and sedentary behavior. Participants wore devices simultaneously for three consecutive days and recorded activity and trip information.</p> <p><strong><span>Results</span></strong></p> <p>The TicWatch Pro 3 Ultra GPS performed better than the S2 model and was similar to the Qstarz in all tested trip-related measures, and it was able to estimate both passive and active trip modes. Both models showed similar results to the Qstarz in life-space-related measures. The TicWatch S2 demonstrated good to excellent overall agreement with the ActiGraph algorithms for the time spent in sedentary and non-sedentary activities, with 84% and 87% agreement rates, respectively. Under supervised conditions, the TicWatch Pro 3 Ultra GPS measured step count consistently with the gold standard observer, with a bias of 0.4 steps. The thigh-worn ActiGraph algorithm accurately classified sitting and lying postures (97%) and standing postures (90%).</p> <p><strong>Conclusion</strong></p> <p>Our multi-sensor approach to monitoring mobility has the potential to capture both accelerometer-derived movement data and trip/life-space data only available through GPS. In this study, we found that the TicWatch models are valid devices for capturing GPS and raw accelerometer data, making them useful tools for assessing real-world mobility in older adults and advancing our knowledge of early mobility decline.</p>
Data from: Evaluation of the horizontal approach to the medial malleolar facet in sagittal talar fractures through dorsiflexion and plantarflexion positions
<p><strong>Background</strong></p> <p>Talar fractures often require osteotomy during surgery to achieve reduction and screw fixation of the fractured fragments due to limited visualization and operating space of the talar articular surface. The objective of this study was to evaluate the horizontal approach to the medial malleolus facet by maximizing exposure through dorsiflexion and plantarflexion positions.</p> <p><strong>Methods</strong><strong> </strong></p> <p>In the positions of foot dorsiflexion, plantarflexion, and functional, we respectively obtained the anterior and posterior edge lines of the projection of the medial malleolus on the medial malleolar facet. The talar model from Mimics was imported into Geomagic software for image refinement. Then Solidworks software was used to segment the medial surface of the talus and extend the edge lines from the three positions to project them onto the "semicircular" base for 2D projection. The exposed area in different positions, the percentage of total area it represents, and the anatomic location of the insertion point at the groove between the anteroposternal protrusions of the medial malleolus were calculated.</p> <p><strong>Results</strong><strong> </strong></p> <p>The mean total area of the "semicircular" region on the medial malleolus surface of the talus was 542.10 ± 80.05 mm<sup>2</sup>. In the functional position, the exposed mean area of the medial malleolar facet around the medial malleolus both anteriorly and posteriorly was 141.22 ± 24.34 mm<sup>2</sup>, 167.58 ± 22.36mm<sup>2</sup>, respectively. In dorsiflexion, the mean area of the posterior aspect of the medial malleolar facet was 366.28 ± 48.12 mm<sup>2</sup>.<sup> </sup>In plantarflexion, the mean of the anterior aspect of the medial malleolar facet was 222.70 ± 35.32 mm<sup>2</sup>.<sup> </sup>The mean overlap area of unexposed area in both dorsiflexion and plantarflexion was 23.32 ± 5.94 mm<sup>2</sup>.<sup> </sup>The mean percentage of the increased exposure area in dorsiflexion (36.71 ± 3.25 %) and plantarflexion were 36.71 ± 3.25 % and 15.13 ± 2.83 %. The mean distance from the insertion point to the top of the talar dome was 10.69 ± 1.24 mm, to the medial malleolus facet border of the talar trochlea was 5.61 ± 0.96 mm, and to the tuberosity of the posterior tibiotalar portion of the deltoid ligament complex was 4.53 ± 0.64 mm.</p> <p><strong>Conclusions</strong><strong> </strong></p> <p>Within the 3D model, we measured the exposed area of the medial malleolus facet in different positions and the anatomic location of the insertion point at the medial malleolus groove. When the foot is in plantarflexion or dorsiflexion, a sufficiently large area and operating space can be exposed during surgery. The data regarding the exposed visualization area and virtual screws need to be combined with clinical experience for safer reduction and fixation of fracture fragments. Further validation of its intraoperative feasibility will require additional clinical research.</p>
Data for: Climatic-niche breadth, niche position, and speciation in lizards and snakes
<p><strong>Aim: </strong>The climatic niche is associated with diversification in many groups of animals and plants. However, the relationships between climatic-niche breadth evolution, climatic-niche position evolution, and speciation remain underexplored. It is particularly unclear whether changes in climatic-niche breadth are related to diversification. We tested two hypotheses relating niche breadth, niche position, and speciation using climatic data in Squamata (lizards and snakes), one of the largest radiations of tetrapods. These hypotheses were: (1) the oscillation hypothesis (niche breadth changes along with niche position and speciation); and (2) the musical chairs hypothesis (niche breadth remains relatively constant when niche position changes during speciation).</p> <p><strong>Location:</strong> Global.</p> <p><strong>Taxon:</strong> Squamata (lizards and snakes).</p> <p><strong>Methods: </strong>We estimated rates of speciation and evolutionary rates for both climatic-niche position and climatic-niche breadth for 5,320 squamate species. We tested relationships among these rates using Bayesian phylogenetic generalized linear-mixed models.</p> <p><strong>Results: </strong>Higher speciation rates were associated with higher rates of evolution in niche position and in niche breadth. Faster rates of change in niche breadth were related to narrower niches and faster rates of change in niche position.</p> <p><strong>Main Conclusions: </strong>Our results support the oscillation hypothesis to explain the relationships between speciation and changes in climatic niche position and climatic niche breadth. We found that species that changed climatic-niche breadths more rapidly: (1) speciated faster; (2) evolved towards narrower niche breadths; and (3) changed climatic-niche positions more rapidly. These results suggest that the oscillation between wider and narrower niches is coupled with climatic-niche divergence and speciation. These conclusions may apply to many other groups of plants and animals in which speciation is often related to climatic-niche divergence.</p>
Rapid positive response of young trees growth to warming reverses nitrogen loss from subtropical soil
<ol> <li>Global warming is widely expected to alter nitrogen (N) cycling in terrestrial ecosystems by accelerating N transformations in soils. However, it is unclear how warming will affect plant–soil N cycling in subtropical ecosystems.</li> <li>Here, we measured the N transformations including net ammoniation, nitrification, nitrous oxide emissions, and nitrate in soil solution throughout the plant–soil continuum with two years of experimental soil warming (+5 °C) in a young subtropical Chinese fir mesocosm. Seasonal variations of soil and plant (foliage and root) N concentrations and isotopes (δ<sup>15</sup>N), foliar water use efficiency, and arbuscular mycorrhizal colonization rate were measured.</li> <li>Soil warming significantly increased net ammoniation and nitrification of the soil, together with the transient positive response observed in inorganic N of the soil. Warming increased nitrate N fluxes in soil solution and nitrous oxide emissions in the first year but not in the second year, suggesting N losses through leaching and gaseous in the initial period of warming. Warming primarily induced enrichment of <sup>15</sup>N in foliage relative to the soil, which was attributed to the trade-offs of persistent increases in plant N uptake caused by enhanced tree growth and a decrease in N losses with continuous warming.</li> <li>Warming significantly increased arbuscular mycorrhizal colonization and foliar water use efficiency throughout the warming period. These results suggest that young trees' growth and N uptake can rapidly acclimate to warming by mechanisms including increases in plant water use efficiency and mycorrhizal colonization.</li> <li>Our findings highlight that warming accelerates the plant–soil N cycle and promotes young trees' growth and N uptake, which in turn reduces soil N lost from this subtropical ecosystem. Therefore, our study suggests that the competition for N between plants and microbes governs whether subtropical forests are opened or closed N cycle systems under climate warming. We highlight that young trees can still maintain their high productivity in facing future climate warming since warming can improve plant N uptake and reduce N loss from subtropical ecosystems. </li> </ol>
Data from: a positive feedback to climate change: the effect of temperature on the respiration of key wood-decomposing fungi does not decline with time
<p>Heterotrophic soil microorganisms are responsible for ~50% of the carbon dioxide released by respiration from the terrestrial biosphere each year. The respiratory response of soil microbial communities to warming, and the control mechanisms, remains uncertain, yet is critical to understanding the future land carbon (C)-climate feedback. Individuals of nine species of fungi decomposing wood were exposed to 90 days of cooling to evaluate the medium-term effect of temperature on respiration. Overall, the effect of temperature on respiration increased in the medium term, with no evidence of compensation. However, the increasing effect of temperature on respiration was lost after correcting for changes in biomass. These results indicate that C loss through respiration of wood-decomposing fungi will increase beyond the direct effects of temperature on respiration, potentially promoting greater C losses from terrestrial ecosystems and a positive feedback to climate change.</p>
Data from: Positive effects of tree species diversity on productivity switch to negative after severe drought mortality in a temperate forest experiment
<p>Synthesis of a large body of evidence from field experiments suggests more diverse plant communities are both more productive as well as more resistant to the effects of climatic extremes like drought. However, this view is strongly based on data from grasslands due to limited empirical evidence from tree diversity experiments. Here we report on the relationship between tree diversity and productivity over ten years in a field experiment established in 2005 that was then affected by the 2018 megadrought in central Europe. Across a number of years, tree species diversity and productivity were significantly positively related, however, the slope switched to negative in the year of the drought. Net diversity effects increased through time, with complementarity making greater continuations to the net diversity effect than selection effects. Complementarity was clearly positive (95 % credible interval) in three and five species mixtures before the drought (2012-2016) but was found to decrease in the year of the drought. Selection effects were clearly positive in 2016, and remained positive in 2018, the drought year in two, three, and five species mixtures. Survival of the Norway spruce (<em>Picea abies</em>) plummeted during drought and a negative relationship between species diversity and spruce survival was found. Our findings suggest that tree diversity per se may not buffer communities against the impacts of extreme drought and that tree species composition and the drought tolerance of tree species (i.e., species identity) will be important determinants of community productivity as the prevalence of drought increases.</p>
Converging findings of climate models and satellite observations on the positive impact of European forests on cloud cover
<p>Overview:<br>This repository hosts a comprehensive dataset resulting from a Space for Time (S4T) analysis (<em>Duveiller et al. 2018</em>). The dataset spans monthly data from 2004 to 2014, providing detailed insights into cloud cover dynamics and land cover characteristics. Leveraging observations from the Cloud CCI MODIS-Aqua dataset (<em>Stengel et al. 2017</em>) and RegCM5 (<em>Giorgi et al. 2023</em>) model outputs at 0.05 degrees resolution, it offers valuable resources for researchers studying atmospheric and terrestrial interactions.</p> <p>Contents:</p> <p>s4t_ESACCI.zip:<br>Output of the space-for-time algorithm applied to the Global MODIS-Aqua cloud cover data for low, medium, and high clouds.<br>s4t_RegCM5.zip:<br>Output of the space for time algorithm applied to the European RegCM5 cloud data for low, medium, and high clouds.<br>Variables:</p> <p>Cloud Area Fractions:<br>Includes low (cll), medium (clm), and high (clh) cloud area fractions, expressed as percentages.<br>Cloud layers are categorized based on cloud top pressure (CTP), following the convention of the International Satellite Cloud Climatology Project.</p>
Dataset related to 'Full-waveform inversion reveals diverse origins of lower mantle positive wave speed anomalies'
<p>This repository contains the global distribution of sources and receivers, tomographic models (netCDF4 format), stacked waveforms from the wavefield modelling (.h5 format), 2D grids of the time-depth correlations (.csv format), and Python scripts required for the full analysis and figures presented in the manuscript.</p>
Data from: Phylogenomic position of eupelagonemids, abundant and diverse deep-ocean heterotrophs
<p>Eupelagonemids, formerly known as Deep Sea Pelagic Diplonemids I (DSPD I), are among the most abundant and diverse heterotrophic protists in the deep ocean, but little else is known about their ecology, evolution, or biology in general. Originally recognized solely as a large clade of environmental ribosomal subunit RNA gene sequences (SSU rRNA), branching with a smaller sister group DSPD II, they were postulated to be diplonemids, a poorly-studied branch of Euglenozoa. Although new diplonemids have been cultivated and studied in depth in recent years, the lack of cultured eupelagonemids has limited data to a handful of light micrographs, partial SSU rRNA gene sequences, a small number of genes from single amplified genomes (SAGs), and only a single formal described species, <em>Eupelagonema oceanica</em>. To determine exactly where this clade goes in the tree of eukaryotes and begin to address the overall absence of biological information about this apparently ecologically important group, we conducted single-cell transcriptomics from two eupelagonemid cells. A SSU rRNA gene phylogeny shows these two cells represent distinct subclades within eupelagonemids, each different from <em>E. oceanica</em>. Phylogenomic analysis based on a 125-gene matrix contrasts with the findings based on ecological survey data, and shows eupelagonemids branch sister to the diplonemid subgroup Hemistasiidae.</p>
OrgaMapper: A robust and easy-to-use workflow for analyzing organelle positioning
<p><span>Eukaryotic cells are highly compartmentalized by a variety of organelles that carry out specific cellular processes. The position of these organelles within the cell is elaborately regulated and vital for their function. For instance, the position of lysosomes relative to the nucleus controls their degradative capacity and is altered in pathophysiological conditions. The molecular components orchestrating the precise localization of organelles remain incompletely understood. A confounding factor in these studies is the fact that organelle positioning is surprisingly non-trivial to address. E.g., perturbations that affect the localization of organelles often lead to secondary phenotypes such as changes in cell or organelle size. These phenotypes could potentially mask effects or lead to the identification of false positive hits. To uncover and test potential molecular components at scale, accurate and easy-to-use analysis tools are required that allow robust measurements of organelle positioning. </span></p> <h2><span>Results</span></h2> <p><span>Here, we present an analysis workflow for the faithful, robust, and quantitative analysis of organelle positioning phenotypes. Our workflow consists of an easy-to-use Fiji plugin and an R Shiny App. These tools enable users without background in image or data analysis to (1) segment single cells and nuclei and to detect organelles, (2) to measure cell size and the distance between detected organelles and the nucleus, (3) to measure intensities in the organelle channel plus one additional channel, (4) to measure radial intensity profiles of organellar markers, and (5) to plot the results in informative graphs. Using simulated data and immunofluorescent images of cells in which the function of known factors for lysosome positioning has been perturbed, we show that the workflow is robust against common problems for the accurate assessment of organelle positioning such as changes of cell shape and size, organelle size and background.</span></p> <h2><span>Conclusion</span></h2> <p><span>OrgaMapper is a versatile, robust and easy-to-use automated image analysis workflow that can be utilized in microscopy-based hypothesis testing and screens. It effectively allows for the mapping of the intracellular space and thereby enables the discovery of novel regulators of organelle positioning. </span></p>
The raw GNSS position time series (raw_time_series.rar) and TDEFNODE models (TDEFNODE_models.rar) related to the manuscript authored by Rui Xu, D. S. Stamps and C. A. Williams
<p>This repository saves the raw GNSS position time series (raw_time_series.rar) and TDEFNODE models (TDEFNODE_models.rar) related to the manuscript authored by Rui Xu, D. S. Stamps and C. A. Williams. For more details, please refer to the NOTES files in each .rar archive.</p>
Orbit positions for the DS sources in the IRS 13 cluster close to Sgr A*
<p>This data is related to the manuscript entiteld "The Evaporating Massive Embedded Stellar Cluster IRS 13 Close to Sgr A*. II. Kinematic structure", published in the ApJ in 2024.</p> <p>We use the Keplerian elements and the data published in "The Evaporating Massive Embedded Stellar Cluster IRS 13 Close to Sgr A*. I. Detection of a Rich Population of Dusty Objects in the IRS 13 Cluster" and "The Evaporating Massive Embedded Stellar Cluster IRS 13 Close to Sgr A*. II. Kinematic structure" to create the orbital solutions published in this data set.</p> <h2>Organization of the data:</h2> <h3>Text files</h3> <p>All .txt files are the output of the fitted Keplerian approximation of the related source. The first column indicates the date, the second and third one the RA and DEC position in arcseconds, respectively. Please note that these positions are projected on the sky with respect to Sgr A<em>. </em>Since all sources are located<em> "to the right" </em>and <em>"below"</em> Sgr A, the related positions contain a minus. </p> <h3>Image files</h3> <p>The related .png files show the plotted .txt files together with the data points published in the manuscript entitled "The Evaporating Massive Embedded Stellar Cluster IRS 13 Close to Sgr A*. I. Detection of a Rich Population of Dusty Objects in the IRS 13 Cluster".</p> <h3>Statistics and Uncertainties</h3> <p>In addition, we publish the outcome of the Markow-Chain-Monte-Carlo (MCMC) simulations as .pdf files. These files indicate the uncertainty range and statistical robustness of the analysis presented in the manuscript entitled "The Evaporating Massive Embedded Stellar Cluster IRS 13 Close to Sgr A*. II. Kinematic structure". Due to the file number restrictions, we uploaded a .rar file that contains all pdf files.</p> <p> </p> <p> </p> <p> </p> <p> </p>
Cetaceans sighting positions from 2009 to 2021 (animal conservation)
<p>Sighting position of the Striped dolphin (<em>Stenella coeruleoalba</em>), Common bottlenose dolphin (<em>Tursiops truncatus</em>) and Fin whale (<em>Balaenoptera physalus</em>) in the 2009 - 2021 period collected buy aerial line transect distance sampling. These data coupled with other from public database are linked with the Copernicus in order to fit ensemble SDMs 16 and predict their current and future potential distribution at the Mediterranean subregional scale.</p> <p> </p>
QUAPOS: A Dataset for Assessing and Optimizing Quadrant Photodiode-based Visible Light Positioning Systems
<p><span>The QUAPOS (QUAdrant photodiode-based POSitioning system) database provides a comprehensive simulated dataset for Visible Light Positioning (VLP) systems using quadrant photodiodes as receivers. QUAPOS includes data from 73 unique scenarios, covering a variety of receiver-transmitter configurations, making it ideal for testing the influence of geometric arrangements on emerging algorithms.</span></p> <p><span>The database, generated using a novel simulation tool, provides both raw and processed data, including the received energy at each receiver for each emitter, estimated emitter position coordinates (calculated using our own positioning algorithm, assuming known receiver positions), and the ground truth emitter locations. The data are available in .csv and .mat formats, <span> </span>ensuring compatibility and ease of use with common platforms such as Matlab© and Python.</span></p> <p><span>This dataset aims to support research on optimising receiver placement, developing noise-resistant algorithms, and comparing different VLP system configurations. In addition, the dataset contains enough data to support a wide range of algorithms, including those based on Machine Learning.</span></p>
FIG. 4 in A new species, Lochriea monocarinata n. sp., and its position in the morphospace of the genus Lochriea Scott, 1942 (Conodonta, Mississippian)
FIG. 4. — Morphospace of the P1 elements of Lochriea Scott, 1942.
Quantum efficiency and vertical position of quantum emitters in hBN determined by Purcell effect in hybrid metal-dielectric planar photonic structures
<p>Data from the article "Quantum efficiency and vertical position of quantum emitters in hBN determined by Purcell effect in hybrid metal-dielectric planar photonic structures", <a href="https://pubs.acs.org/doi/10.1021/acsphotonics.4c01416">ACS Photonics, (2024)</a> - [arXiv:2407.20160]</p>
A deep learning-based parametric inversion for forecasting water-filled bodies position using electromagnetic method
<p>We design a tunnel electromagnetic joint scan observation system and present a deep learning-based parametric inversion for improved tunnel electromagnetic imaging, designed specifically for tunnel prediction of water filled structures. It utilizes a configuration wherein transmitters scan along the surface while receivers are positioned within the tunnel, employing time-domain and frequency-domain transmitters and a multi-component receiver. The DL model for the first time provides parametric imaging of two different view, forming a self-checking mechanism, which can help constrain the predictions and reduce the non-uniqueness of the inversion. Trained by synthetic data, our system shows impressive adaptability to predict the 3D spatial position of water-filled anomalies and strong robustness in the tunnel environment with metal interference.</p> <p> </p> <p>Before prediction, you need to download the pre-trained weight model which contain UNet_model/FTEM.ckpt.data-00000-of-00001, UNet_model/FTEM.ckpt.index, UNet_model/FTEM.h5. Then place the directory containing the weight model in the same directory as the prediction code. Then run: python predi.py</p>
Figure 350 in Further review of Orthochirus Karsch, 1892 (Scorpiones: Buthidae) from Asia: taxonomic position of O. melanurus, O. persa, O. scrobiculosus, and description of six new species
Figure 350. Orthochirus melanurus (Kessler, 1874), reproduced from Kessler (1874, Tab. I).
Sensor Position Comparison Dataset
<pre> </pre> <p>A dataset containing IMU recordings with full motion capture reference from 14 participants (approx. 10000 strides). Each participant was equipped with 15 synchronised IMUs (6 at different positions at each shoe, 1 at each ankle, and 1 and the lower back).</p> <p>The main goal of the dataset is to compare the recorded signals of the 6 sensors attached to each foot.</p> <p>For more information about the dataset check the `README.md` file in the dataset.</p> <p>If you are using the dataset, please cite the following paper:</p> <p>Küderle, Arne, Nils Roth, Jovana Zlatanovic, Markus Zrenner, Bjoern Eskofier, and Felix Kluge.<br> “The Placement of Foot-Mounted IMU Sensors Does Affect the Accuracy of Spatial Parameters during Regular Walking.”<br> PLOS ONE 17, no. 6 (June 9, 2022): e0269567. https://doi.org/10.1371/journal.pone.0269567.</p>
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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.