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179 results for “data matrix”
Data from: An ASC-based unitary matrix pencil method for parameter estimation of group target
<p><span>The unitary matrix pencil (UMP) method has been successfully applied to antenna array optimization. In this work, the UMP method is applied to the parameter estimation of target detection based on the attributed scattering center (ASC) model. This method can accurately estimate the number of arbitrary group targets in the space. Firstly, the radar cross section (RCS) is reconstructed based on the ASC model. Since the unitary matrix can be used to process the parameter estimation of the echo with 'sum of attenuation exponents', the unitary matrix is constructed by the samples from this reconstructed RCS. Moreover, the stronger scattering center can be characterized via the larger singular values, and the number of group targets can be obtained by solving the number of large singular values. Then, singular value decomposition (SVD) is performed on this unitary matrix, and some larger singular values are screened by setting an appropriate threshold. The higher estimation accuracy can be obtained by fusing the echoes from multiple frequencies and angles. Besides, the estimation accuracies of this proposed method in this work are discussed under different signal-to-noise ratios (SNR) considering the noise in the actual scene. Simulation results show that this method can effectively and accurately estimate the number of group targets, and it shows strong robustness. <span>In this data file, the simulation results obtained by commercial software FEKO and MATLAB are listed.</span></span></p>
Matrix Profile of Seismological Data Repository
<p>The Computed Matrix Profile (MP) repository for seismic data.</p> <p>Please see below the archived manuscript of Shakibay Senobari et al., (Submitted to JGR, under review) for more information regarding the Matrix Profile and data set:</p> <p>essopenarchive.org/604953/p1vlDMs-5b0zsrs7C033Ug</p> <p>https://doi.org/10.1002/essoar.10512525.1</p>
Linguistic Matrix Theory Data
<p>Dataset for analyzing the statistics of ensembles of matrices in the Linguistic Matrix Theory programme introduced in arxiv:1703.10252. A Python script (ratios.py) for testing the fit of the matrix data to the 13-parameter permutation invariant Gaussian matrix models introduced in arXiv:1809.07559 is given.</p> <p>Two Sage+Jupyter notebooks are provided that assist in the computation of theoretical higher-order moments based on permutation invariant matrix model along with a set of Python functions (MFunctions.py) that are useful for further Gaussianity tests as well as computational language tasks. The dataset was constructed by D. Kartsaklis for arXiv:1703.10252, ratios.py was developed for arXiv:1912.10839 and the Sage+Jupyter code was developed in arXiv:2104.03707. MFunctions.py was developed in arXiv:2202.06829.</p>
Lateral interactions govern self-assembly of the bacterial biofilm matrix protein BslA (experimental and simulation data)
<p>The soil bacterium Bacillus subtilis is a model organism to investigate the formation of biofilms, the predominant form of microbial life. The secreted protein BslA self-assembles at the surface of the biofilm to give the B. subtilis biofilm its characteristic hydrophobicity. To understand the mechanism of BslA self-assembly at interfaces, here we built a molecular model based on the previous BslA crystal structure and the newly determined crystal structure of the BslA paralogue YweA. Our analysis revealed two conserved protein-protein interaction interfaces supporting BslA self-assembly into an infinite 2d lattice that fits previously determined transmission microscopy images. Molecular dynamics simulations and in vitro protein assays further support our model of BslA elastic film formation, while mutagenesis experiments highlight the importance of the identified interactions for biofilm structure. Based on this knowledge, YweA was engineered to form more stable elastic films and rescue biofilm structure in bslA deficient strains. These findings shed new light on protein film assembly and will inform the development of BslA technologies which range from surface coatings to emulsions in fast-moving consumer goods.</p>
Mygalomorph spiders: Discrete data matrix of burrow construction behavior and somatic morphology
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Raw, unprocessed SEM data images for: Figure 1: Scanning electron microscope images of “type-1 bone collagen” demineralized bone matrix fibrils
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Data from: CRISPR/Cas9 knockout of shell matrix protein 1 in the slipper-snail Crepidula atrasolea
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Data from: A myristoyl switch at the plasma membrane triggers cleavage and oligomerization of Mason-Pfizer monkey virus matrix protein
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Data matrix for phylogeography of Euphorbia jolkinii
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Concatenated data matrix of DNA sequences from two nuclear and four chloroplast gene regions
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Data from: Matrix context and patch quality jointly determine diversity in a landscape-scale experiment
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Data matrix for phylogeography of sea hibiscus (Hibiscus tiliaceus) group
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Data from: Isolating the role of the matrix at patch and landscape scales
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Colorectal cancer scRNA-seq 10xG-format data matrix
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Data from: An ASC-based unitary matrix pencil method for parameter estimation of group target
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Supplementary data to accompany "Abundant metabolite-matrix adducts illuminate the dark metabolome of MALDI-mass-spectrometry imaging datasets"
<p>This dataset accompanies the publication "Abundant metabolite-matrix adducts illuminate the dark metabolome of MALDI-mass-spectrometry imaging datasets". The dataset includes all files, scripts and results that are included in the associated publication.</p> <p>Spatial metabolomics using mass spectrometry imaging (MSI) is a powerful tool to map hundreds or thousands of metabolites across biological systems. One major challenge is the complexity of the data, which includes signals from experimental artifacts. Formation of adducts (<em>e.g. </em>with Na+or K+) or abundant matrix-cluster, in the case of matrix-assisted laser desorption ionization (MALDI)-MSI, strongly increase peak counts. We developed <em>mass2adduct</em>, a universally applicable tool for adduct abundance estimations in high-mass-resolution spatial metabolomics datasets. Our study illustrates that MALDI-MSI data density is remarkably driven by adduct formation and revealed a major influence of so far unrecognized metabolite-matrix adducts on total peak counts. Current data analyses neglect those matrix adducts and therefore overestimate total metabolite numbers, thereby inflating the dark metabolome size.</p> <p>mass2adduct zenodo doi (10.5281/zenodo.1405088)</p> <p>mass2adduct gihub: https://github.com/kbseah/mass2adduct</p>
Data from: Temporal stability versus community matrix measures of stability and the role of weak interactions
<p>Relationships between different measures of stability are not well understood in part because empiricists and theoreticians tend to measure different aspects and most studies only explore a single form of stability. Using time-series data from experimental plankton communities, we compared temporal stability typically measured by empiricists (coefficient of variation of biomass) to stability measures typically measured by theoreticians derived from the community matrix (asymptotic resilience, initial resilience, and intrinsic stochastic invariability) using first-order multivariate autoregressive models (MAR). Community matrices were also used to derive estimates of interaction strengths between plankton groups. We found no relationship between temporal stability and stability measures derived from the community matrix. Weaker interaction strengths were generally associated with higher stability for community matrix measures of stability but were not consistently associated with higher temporal stability. Temporal stability and stability measures derived from the community matrix stability appear to represent different aspects of stability reflecting the multi-dimensionality of stability.</p>
Data from: Multi-driver and multi-scale assessment of vine community structure and composition across a complex tropical environmental matrix
Ecological communities are structured by multiple processes operating at multiple scales yet understanding the scale-dependency of these processes remains an open challenge. This might be particularly true for parasites, for which biotic rather than abiotic processes may play a primary role in structuring communities. Focusing on vines, a group of structural parasites that gain access to the canopy using different climbing mechanisms, we examined the influence of abiotic factors in tandem with host-parasite and parasite-parasite interactions in the assembly of tropical vine communities. Two synthetic variables, namely Climate1 and landscape Variety, were consistently important in explaining variation in species richness and diversity, as well as species composition, but their importance varied with scale. Whereas Climate1 summarizes the largest variability among climatic variables, landscape Variety expresses landscape heterogeneity within a neighborhood. Significant patterns of species co-occurrences suggest that vine-vine interactions also contribute to vine community assembly. Our results may be critical to understand vine proliferation and help design management strategies for their control.
Data from: Matrix correspondence tests on the DNA phylogeny of the Tenerife lacertid elucidate both historical causes and morphological adaptation
Previous studies using partial regression Mantel tests of matrix correspondence on within-island geographic variation in the color pattern of the Tenerife (Canary Islands) lacertid lizard (Gallotia galloti) support natural selection for different north--south climatically determined biotopes but do not support any historical cause. However, tests on the DNA phylogeny based primarily on population data from 57 localities on Tenerife support the hypothesis that there were populations on two putative precursor islands that have come into secondary contact and introgressed after these islands were joined to form Tenerife by the eruption of the Canadas edifice. Subsequent partial Mantel tests continue to support the hypothesis that color pattern is adapted to the climatic biotopes even when this phylogenetic information is taken into account by (1) testing for color pattern adaptation separately within each lineage and (2) testing for color pattern adaptation across the entire island while considering the molecular phylogenetic relationships as representing an alternative explanation. Selection has largely expunged any trace of the geological history from current morphological variation, and the introgression of these island populations after an estimated 0.7 million years of separation gives an insight into the relationships between allopatric divergence and reproductive isolation.
Data from: Effect of the landscape matrix on gene flow in a coastal amphibian metapopulation
Functional connectivity is crucial for the persistence of a metapopulation, because migration among subpopulations enables recolonization and counteracts genetic drift, which is especially important in small subpopulations. We studied the degree and drivers of connectivity among occupied patches of a coastal dune metapopulation of the Natterjack Toad (Epidalea calamita Laurenti), on the basis of microsatellite variation. As spatial landscape heterogeneity is expected to influence dispersal and genetic structure, we analyzed which landscape features affect functional connectivity and to what extent. Sixty different landscape resistance scenarios as well as the isolation-by-distance model were compared using two landscape genetics approaches. We identified three subpopulations with unidirectional levels of gene flow among the two most geographically separated subpopulations, while inferred gene flow into the geographically intermediate subpopulation was limited. Urbanization and vegetation height negatively affected connectivity. Low estimates of genetic diversity and effective population size indicate that conservation measures in the smallest and most isolated subpopulation are required.
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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.