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.
278
datasets available to search
ShareScore release 0.9.0
Dataset results
278 results for “square”
Data from: A prediction model of compressor with variable geometry diffuser based on elliptic equation and Partial Least Squares
In order to fulfill more and more extensive intake air flow range of diesel engine, variable geometry compressor (VGC) is introduced into turbocharged diesel engine. However, due to the variable diffuser vanes angle (DVA), the prediction for the performance of VGC becomes more difficult than normal compressor. In the present study, a prediction model comprised of elliptical equation and PLS (Partial Least Squares) model was proposed to predict the performance of VGC. The speed lines of pressure ratio map and efficiency map with elliptical equation were fitted, and the coefficients of elliptical equation was introduced into PLS model to build the polynomial relationship between the coefficients and relative speed, DVA. And further, the maximal order of polynomical was detailed investigated to reduce the number of sub-coefficients and acceptable fit accuracy simultaneously. The prediction model was validated with sample data and in order to present the superiority in compressor performance prediction, the prediction results of this model were compared with those of look-up table and BPNN. The validation and comparison results show that the prediction accuracy of the new developed model is acceptable, and this model is much more suitable than look-up table and BPNN under the same condition in the VGA performance prediction. Moreover, the new developed prediction model provides a novel and effective prediction solution for VGC and can be used to improve the accuracy of the thermodynamic model for turbocharged diesel engines in the future.
Data from: Time-dependent speciation and extinction from phylogenies: a least squares approach
Molecular phylogenies contribute to the study of the patterns and processes of macroevolution even though past events (fossils) are not recorded in these data. In this paper, I consider the general time-dependent birth–death model in order to fit any model of temporal variation in speciation and extinction to phylogenies. I establish formulae to compute the expected cumulative distribution function of branching times for any model, and, building on previous published works, I derive maximum likelihood estimators. Some limitations of the likelihood approach are described, and a fitting procedure based on least squares is developed that alleviates the shortcomings of maximum likelihood in the present context. Parametric and nonparametric bootstrap procedures are developed to assess uncertainty in the parameter estimates, the latter version giving narrower confidence intervals and being faster to compute. I also present several general algorithms of tree simulation in continuous time. I illustrate the application of this approach with the analysis of simulated data sets, and two published phylogenies of primates (Catarrhinae) and lizards (Agamidae).
Model St. Basil's Cathedral Red Square
📍 [Longwood, FL](https://scaniver.se/L28.71457,-81.37354) Source: Objaverse 1.0 / Sketchfab
Square Antiprismatic Chelation Is a Key Determinant for Potassium Ion Selectivity
<p>Files presented here are archives KDB.tar.gz, MEMB_DB.tar.gz and PDB70.tar.gz.</p> <p>Archives KDB.tar.gz, MEMB_DB.tar.gz and PDB70.tar.gz contain models of indentified sites for potassium channels (dataset #1), other membrane proteins, excluding potassium channels (dataset #2) and non-membrane proteins form PDB70 (dataset #3). The name of a folder in the dataset corresponds to PDB ID of a protein for which calculation were made. Each folder contain the following files:</p> <ul> <li><PDB_ID>.pdb — the original pdb file.</li> <li><PDB_ID>.ref — file that contains oxygens and nitrogens from original pdb that were used for scanning.</li> <li><PDB_ID>_COMBS.txt — combinations of atoms that were used for calculations.</li> <li><PDB_ID>_alignment_X.pdb — original template that was aligned to the protein atoms. X denotes a number of the alignment.</li> <li><PDB_ID>_site_X.pdb — this pdb file contains eight atoms that form the site for K+ and which were used for the corresponding alignment X.</li> <li><PDB_ID>_RES.txt — the combinations of protein atoms that form the site are written in square brackets. The RMSD value for the alignment to this site is written to the right of them.</li> <li><PDB_ID>_RMSD.log — this file contains RMSD values of the template alignment to the corresponding site.</li> </ul> <p> </p>
FIGURE. Map of the studied regions (Black square―site of sampling). in Morphological and phylogenetic relations of members of the genus Coelastrella (Scenedesmaceae, Chlorophyta) from the Ural and Khentii Mountains (Russia, Mongolia)
FIGURE. Map of the studied regions (Black square―site of sampling).
Automated systematic evaluation of cryo-EM specimens with SmartScope - Trained models for square and hole detectors
<p>Trained models used by SmartScope for square and hole detection.</p>
MAP. Stations around New Caledonia: SPANBIOS in yellow squares; EXBODI in red spots. in Additional records of bathyal ascidians (Tunicata) from the New Caledonia region
MAP. Stations around New Caledonia: SPANBIOS in yellow squares; EXBODI in red spots.
ORAL HISTORY, FIGURATION AND INTERPRETATION OF THE RUBBER TANKER: AN ANALYSIS OF THE SYMBOLIC REPRESENTATION PRESENT IN THE RUBBER SQUARE SQUARE, IN PORTO VELHO.
Open the record for dataset details and reuse information.
Square Antiprismatic Chelation Is a Key Determinant for Potassium Ion Selectivity
<p>Files presented here are archives KDB.tar.gz, MEMB_DB.tar.gz and PDB70.tar.gz.</p> <p>Archives KDB.tar.gz, MEMB_DB.tar.gz and PDB70.tar.gz contain models of indentified sites for potassium channels (dataset #1), other membrane proteins, excluding potassium channels (dataset #2) and non-membrane proteins form PDB70 (dataset #3). The name of a folder in the dataset corresponds to PDB ID of a protein for which calculation were made. Each folder contain the following files:</p> <ul> <li><PDB_ID>.pdb — the original pdb file.</li> <li><PDB_ID>.ref — file that contains oxygens and nitrogens from original pdb that were used for scanning.</li> <li><PDB_ID>_COMBS.txt — combinations of atoms that were used for calculations.</li> <li><PDB_ID>_alignment_X.pdb — original template that was aligned to the protein atoms. X denotes a number of the alignment.</li> <li><PDB_ID>_site_X.pdb — this pdb file contains eight atoms that form the site for K+ and which were used for the corresponding alignment X.</li> <li><PDB_ID>_RES.txt — the combinations of protein atoms that form the site are written in square brackets. The RMSD value for the alignment to this site is written to the right of them.</li> <li><PDB_ID>_RMSD.log — this file contains RMSD values of the template alignment to the corresponding site.</li> </ul>
Figure. The occurrence of paedomorphosis in Lissotriton vulgaris populations within Romania: past records (filled diamonds), our record (filled square). in Facultative paedomorphosis in a population of Lissotriton vulgaris (Amphibia: Salamandridae) from the Danube Delta Biosphere Reserve (Romania)
Figure. The occurrence of paedomorphosis in Lissotriton vulgaris populations within Romania: past records (filled diamonds), our record (filled square).
Data from: Optimal allocation ratios: A square root relationship between the ratios of symbiotic costs and benefits
<p>All organisms struggle to make sense of environmental stimuli in order to maximize their fitness. For animals, single cells and superorganisms responses to stimuli are generally proportional to stimulus ratios – a phenomenon described by Weber's Law. However, Weber's Law has not yet been used to predict how plants respond to stimuli generated from their symbiotic partners. Here, we develop a model for quantitatively predicting the carbon (C) allocation ratios into symbionts that provide nutrients to their plant host. Consistent with Weber's Law, our model demonstrates the optimal ratio of resources allocated into a less- relative to the more-beneficial symbiont scale to the ratio of the growth benefits of the two strains. As C allocation into symbionts increases, the ratio of C allocation into two strains approaches the square root of the ratio of symbiotic growth benefits (e.g., a worse symbiont providing ¼ the benefits gets sqrt(¼) =1/2 the C of a better symbiont). We document a compelling correspondence between our square-root model prediction and a meta-analysis of experimental literature on C allocation. This type of preferential allocation can promote coexistence between more- and less-beneficial symbionts, offering a potential mechanism behind the high diversity of microbial symbionts observed in nature.</p>
Data for: Artificial squares, rectangles and Xray images in random rotational orientations, centered and in different sizes
<p>SORFAC-CT (Cylindrical-Topology Self-Organizing Reference-Free Alignment and Classification; pronounced sôr-fakt or sôr-fak-si-ti) is an efficient method of reference-free rotational image alignment. SORFAC-CT circumvents the dependence of subjective user- or computer-generated external or internal reference images used by other reference-based techniques. Alignment is performed using a Kohonen self-organizing map (SOM), configured on a cylindrical array of artificial neurons. Although alternative alignment protocols often depend on an expert to adjust many ad hoc parameters, SORFAC-CT instead achieves the minimization of one objectively calculated target function by varying only two free parameters. Because SOMs preserve the topological properties of the training (dataset) images, the relative in-plane rotational orientations of dataset images are obtained directly from the array's intrinsic cylindrical coordinate system by noting each mapped dataset image's respective azimuthal angle coordinate placement around the cylinder. Dataset images are not rotated into alignment with internally or externally generated reference images. Instead, SORFAC-CT starts with a cylindrical array of proto-models consisting of random pixel values. The proto-models gradually morph to become the rotational class models by an unsupervised process. The dataset images are then mapped to the class models according to greatest similarity; the alignment angles directly read off the cylinder. This was tested on datasets including square, rectangular and hexagonal geometrical shapes in six different sizes, to introduce heterogeneity. It was also tested using noisy 2-dimensional projections of the AQP-1 x-ray model. The results were near-perfect alignments that could be improved by increasing cylinder circumference, until the resolution limits of the dataset images are reached.</p>
DFT Calculated xyz in Support of "Computational Modelling and Mechanistic Insight into Light-driven CO Dissociation of square-planar Rh(I) Complexes"
<p>The C-H activation of alkanes mediated by electron-rich metal complexes, such as Rh(I) complexes, has drawn considerable attention in recent decades. In order to interact with the C-H bond, most Rh complexes, such as <em>trans-</em>Rh(PMe<sub>3</sub>)<sub>2</sub>(CO)(Cl) need to be activated through irradiation, which leads to the photocleavage of the Rh-CO bond and the formation of the active species Rh(PMe<sub>3</sub>)<sub>2</sub>(Cl). To elucidate the details of the photochemistry of <em>trans-</em>Rh(PMe<sub>3</sub>)<sub>2</sub>(CO)(Cl), we here present a computationally derived picture as obtained at the density functional level of theory (DFT) in combination with multireference wavefunction-based methods. We have identified that the photocleavage of CO proceeds via the metal-centered excited state, which is populated through intersystem crossing (ISC) from the dipole-allowed excited state S<sub>1</sub>. Moreover, the present study unraveled the reasons for the low C-H activation efficiency when using Rh featuring the bidentate ligand 1,2-bis(dimethylphosphino)ethane (dmpe), namely due to its unfavorable photochemical properties, i.e., the small driving force for light-induced CO loss and the fast deactivation of <sup>3</sup>MC state back to the singlet ground state. In this study, we provide theoretical insight into mechanistic details underlying the light-induced CO dissociation process, for Rh complexes featuring PMe<sub>3</sub> and dmpe ligands.</p>
A Waist Circumference and Body Fat Percentage Dual-Dimension Nine-Square Grid Model for Precision Obesity Management: A Randomized Controlled Trial in Overweight/Obese University Students
ClinicalTrials.gov study NCT07133542. IPD Sharing: YES. Countries: 1. Publications: 0.
Investigation of the Psychometric Properties of the Squares Test in Measuring Hand Function in Parkinson's Disease
ClinicalTrials.gov study NCT03580486. IPD Sharing: NO. Countries: 0. Publications: 9.
Data from: Compressor map regression modelling based on partial least squares
Open the record for dataset details and reuse information.
Data from: Time-dependent speciation and extinction from phylogenies: a least squares approach
Open the record for dataset details and reuse information.
Chromosome 28 genotypes and phenotypes for all samples used in the analyses, full panel of 298 genotypes, and R script for R-squared values
Open the record for dataset details and reuse information.
Data for: Artificial squares, rectangles and Xray images in random rotational orientations, centered and in different sizes
Open the record for dataset details and reuse information.
Data from: A prediction model of compressor with variable geometry diffuser based on elliptic equation and Partial Least Squares
Open the record for dataset details and reuse information.
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.