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.
1,047
datasets available to search
ShareScore release 0.9.0
Dataset results
1,047 results for “constraint”
Borrowing Constraints and Demand for Remedial Education: Evidence from Tanzania
<p>Replication package for “Borrowing Constraints and Demand for Remedial Education: Evidence from Tanzania” by Konrad Burchardi, Jonathan de Quidt, Selim Gulesci, and Munshi Sulaiman.</p>
Data release: "The metallicity dependence and evolutionary times of merging binary black holes: Combined constraints from individual gravitational-wave detections and the stochastic background"
<p>This data release contains the data to reproduce the results of "<strong>The metallicity dependence and evolutionary times of merging binary black holes: Combined constraints from individual gravitational-wave detections and the stochastic background</strong>" (<a href="https://arxiv.org/abs/2310.17625">arXiv:2310.17625</a>, published version <a href="https://iopscience.iop.org/article/10.3847/1538-4357/ad3d5c">here</a>).</p> <p>The code that was used to generate this data can be found on <a href="https://github.com/kevinturbang/bbh_gwb_time_delay_inference">this GitHub repository</a>. Jupyter notebooks to reproduce the figures of the paper are also included, and can be found <a href="https://github.com/kevinturbang/bbh_gwb_time_delay_inference/tree/main/figures">here</a>.</p>
Isotopic Constraints from Carbonates on the Thermochronologic Evolution of Fluid Flow and Faulting in the Monitor Range, Central Nevada, USA
<p>The dataset contains the following information:</p> <p>"Full data summary"- Isotopic data and GPS coordinates for all samples analyzed in this study.</p> <p>"L013 report", "L052 report"- Raw clumped isotope data for all samples.</p> <p>"U-Pb raw data"- Calcite U/Pb ratios of psuedo-spots for all unknown samples and standards analyzed in this study.</p> <p>"Yanay CC20"- Zircon U/Pb data for standards and unkown sample grains.</p>
Dataset: Geochemical - mineralogical constraints on the provenance of sediment supplied from South African river catchments draining into the southwestern Indian Ocean
<p>Supplementary Information Table 1 from manuscript in AGU <span>Geochemistry, Geophysics, Geosystems, titled</span>: Geochemical - mineralogical constraints on the provenance of sediment supplied from South African river catchments draining into the southwestern Indian Ocean.</p> <p>Pryor, E.J<span>1,†*</span>; Hall, I.R<span>1</span>; Simon, M.H<span>2,3</span>; Andersen, M<span>1</span>; Babin, D<span>4</span>; Starr, A<span>5</span>; Lipp, A<span>6</span>; van der Lubbe, H.J.L<span>7</span></p> <p><span>1</span>Cardiff University, School of Earth and Environmental Sciences, Main Building, United Kingdom</p> <p><span>2</span>NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway</p> <p><span>3</span> SFF Centre for Early Sapiens Behaviour (SapienCE), Bergen, Norway</p> <p><span>4</span><span>Lamont-Doherty </span>Earth Observatory of Columbia University, 61 Rt 9W, Palisades, New York 10964-8000, USA</p> <p><span>5</span>Department of Geography, University of Cambridge, United Kingdom</p> <p><span>6</span>Department of Earth Sciences, University College London, United Kingdom</p> <p><span>7</span>Department of Earth Sciences, Cluster Geochemistry & Geology, Vrije Universiteit Amsterdam</p> <p>(VU).</p> <p>†Now at Department of Earth Sciences, University of Bergen, Norway; SFF Centre for Early Sapiens Behaviour (SapienCE), Bergen, Norway</p> <p>*Corresponding author: Ellie Pryor (ellie.pryor@uib.no)</p> <p>This table provides the bedrock geology data for each river catchment between Durban and Cape Town, South Africa which was required for the endmember mixing model discussed in the submitted manuscript. This data can be used for endmember mixing calculations or used for GIS mapping. </p> <p>We also provide the grain size data measured on a Sympatec HELOS KR laser diffraction particle sizer. This grain size was inputted into the grain size endmember mixing model Analysize package within MATLAB 2022b (from Paterson and Heslop, 2015).</p>
Physical and biological constraints on the capacity for life-history expression of anadromous salmonids: an Eel River, California, case study
Recovery of anadromous salmonid populations is complicated by the fact that these fish have complex life-histories. Habitat valuation and capacity methods need to account for spatiotemporal variability in temperature, geomorphic features, and a species' thermal sensitivity mediated by biological interactions. We examined this interplay in a case study of steelhead trout (<i>Oncorhynchus mykiss</i>) and Chinook Salmon (<i>O. tshawytscha</i>) in California's Eel River watershed. We estimated habitat suitability and fish capacity for each salmonid run and freshwater life stage during average, cool, and warm years in each of the watershed's subbasins, including a high-elevation subbasin upstream of an impassable dam. Our estimates varied depending on whether we accounted for exposure to the Sacramento pikeminnow (<i>Ptychocheilus grandis</i>), an introduced predator/competitor. Our results indicate that the dammed subbasin could provide an important cool-water refuge during warm years and from pikeminnow, potentially improving the productivity and resilience of multiple anadromous salmonid populations. Our approach can be applied in any setting where spatially explicit habitat metrics can be estimated and population specific and life-stage specific habitat criteria can be specified.
The functional diversity of marsupial limbs is influenced by both ecology and developmental constraint
<p>Extant marsupials are less ecologically diverse than placentals, and this is reflected by placentals exhibiting a greater diversity of locomotor modes, including powered flight and fully aquatic swimming. One proposed explanation for this discrepancy is that the development of more disparate marsupial forelimbs is prevented by the neonate's crawl to the pouch, which requires precocious forelimb development for climbing adaptations. To test predictions of this Developmental Constraint Hypothesis, we pursue a comparative morphometric study on osteological traits of mammalian limbs, with an emphasis on functional differentiation of marsupial limbs among locomotor modes. We apply multivariate analyses to a large dataset of limb metrics and a diverse sample of mammals, with the placental sample limited to taxa whose locomotor modes are exhibited in marsupials. Overall, we do not find consistent evidence in support of the Developmental Constraint Hypothesis. Diprotodontia serves as an exception, with comparisons of their forelimbs to hind limbs supporting the Developmental Constraint Hypothesis. Our results suggest that developmental constraints on marsupial forelimbs may have limited marsupial diversity to some degree. Despite this, the marsupial locomotor groups show unexpectedly high levels of morphological differentiation relative to placentals of the same locomotor modes, indicating that ecological functions may overcome developmental constraints on a macroevolutionary scale.</p>
Cosmological constraints from the tomographic cross-correlation of DESI Luminous Red Galaxies and Planck CMB lensing
<p>Input maps and derived data for the DESI LRG samples, cross-correlated with the Planck CMB lensing maps, from</p> <p>Cosmological constraints from the tomographic cross-correlation of DESI Luminous Red Galaxies and Planck CMB lensing</p> <p>Martin White, et al.</p> <p>https://arxiv.org/abs/2111.09898</p> <p> </p>
Data for: More than what they eat: Uncoupled biophysical constraints underlie geographic patterns of herbivory
<p>Data used in Lynn et al. 2022 at Ecography. The first dataset contains data from published studies used for the main analyses of the paper. The second dataset is from Lynn and Fridley 2019 in Journal of Plant Ecology used for figure 3. The abstract from the paper is:</p> <p><span>Herbivory rates have classically been hypothesized to decrease from the tropics towards higher latitudes because the more benign abiotic conditions in tropical systems foster greater ecosystem complexity including greater intensity of biotic interactions. However, attempts to quantify latitudinal patterns of herbivory often fail to support this hypothesis. While biases have been offered as explanations for null results, here, we argue that framing the question of latitudinal variation in herbivory around nutrient and energetic constraints of insect herbivores and plants may provide mechanistic explanations of latitudinal herbivory patterns. As a case study, we focused on sodium as an uncoupled nutrient between herbivore and plant communities: sodium is a key limiting micronutrient for herbivore neural and muscular development while present at orders of magnitude lower concentrations in plants. We compared sodium deposition with latitude, mean annual temperature (MAT), and actual evapotranspiration (measure of primary productivity; AET) in their ability to predict consumed percentage leaf area from published datasets. Leaf percent herbivory increased with sodium deposition and MAT and decreased with latitude but was unrelated to AET. Sodium had comparable effect size and predictive ability to either MAT or latitude. Additionally, herbivory was highest in locales with both high sodium deposition and high MAT. Our hypothesis that geographic variation in herbivory is driven by an interaction of unrestrictive temperature environments (high MAT) and limiting nutrient supply to herbivores (high sodium deposition) was strongly supported. We propose that greater generality, predictability, and theoretical development on geographic variation in herbivory will arise from a refocus on the biophysical constraints (e.g., productivity, micronutrient availability, leaf mass consumed) that ultimately control consumer interactions rather than latitude <em>per se</em>. This refocus is likely to open new hypotheses for the evolution of defense syndromes across plant populations and communities based on the specific geography of limiting nutrients.</span></p>
Retrieving Data Constraint Implementations Using Fine-Grained Code Patterns
<p>Business rules are an important part of the requirements of software systems that are meant to support an organization. These rules describe the operations, definitions, and constraints that apply to the organization. Within the software system, business rules are often translated into constraints on the values that are required or allowed for data, called data constraints. Business rules are subject to frequent changes, which in turn require changes to the corresponding data constraints in the software. The ability to efficiently and precisely identify where data constraints are implemented in the source code is essential for performing such necessary changes.</p> <p>In this paper, we introduce Lasso, the first technique that automatically retrieves the method and line of code where a given data constraint is enforced. Lasso is based on traceability link recovery approaches and leverages results from recent research that identified line-of-code level implementation patterns for data constraints. We implement three versions of Lasso that can retrieve data constraint implementations when they are implemented with any one of 13 frequently occurring patterns. We evaluate the three versions on a set of 299 data constraints from 15 real-world Java systems, and find that they improve method-level link recovery by 30%, 70%, and 163%, in terms of true positives within the first 10 results, compared to their text-retrieval-based baseline. More importantly, the Lasso variants correctly identify the line of code implementing the constraint inside the methods for 68% of the 299 constraints.</p>
Hands On Exercise 3: Productions constraints by timeslice
<p>Files available in this repository:</p> <p>1) Default example of MUSE</p> <p>2) Results excel spreadsheet</p> <p>3) Final modelled example</p>
Data from: Genetic analysis of life-history constraint and evolution in a wild ungulate population
Trade-offs among life-history traits are central to evolutionary theory. In quantitative genetic terms, trade-offs may be manifested as negative genetic covariances relative to the direction of selection on phenotypic traits. Although the expression and selection of ecologically important phenotypic variation are fundamentally multivariate phenomena, the in situ quantification of genetic covariances is challenging. Even for life-history traits, where well-developed theory exists with which to relate phenotypic variation to fitness variation, little evidence exists from in situ studies that negative genetic covariances are an important aspect of the genetic architecture of life-history traits. In fact, the majority of reported estimates of genetic covariances among life-history traits are positive. Here we apply theory of the genetics and selection of life histories in organisms with complex life cycles to provide a framework for quantifying the contribution of multivariate genetically based relationships among traits to evolutionary constraint. We use a Bayesian framework to link pedigree-based inference of the genetic basis of variation in life-history traits to evolutionary demography theory regarding how life histories are selected. Our results suggest that genetic covariances may be acting to constrain the evolution of female life-history traits in a wild population of red deer Cervus elaphus: genetic covariances are estimated to reduce the rate of adaptation by about 40%, relative to predicted evolutionary change in the absence of genetic covariances. Furthermore, multivariate phenotypic (rather than genetic) relationships among female life-history traits do not reveal this constraint.
Replication Package (version 2) for "Information Constraints and Examination Quality in Patent Offices: The Effect of Initiation Lags" (International Journal of Industrial Organization, forthcoming)
<p>This replication package contains the datasets in Stata 16 format and the Stata do file to generate the results reported in "Information Constraints and Examination Quality in Patent Offices: The Effect of Initiation Lags" by Sadao Nagaoka and Isamu Yamauchi, to be published in International Journal of Industrial Organization.</p>
Differences in feather structure between urban and forest great tits – constraint or adaptation?
<p>Urbanization is one of the strongest habitat transforming processes today that has resulted in changes in the ecological conditions for wild populations. In birds, the limitation of natural food sources and a warmer microclimate in cities can potentially influence the development and functioning of the plumage that may have important fitness consequences. Despite its potential significance, the plumage structure of urban birds are largely unexplored and it is unclear whether and how they respond to urban ecological processes such as different constraints and selection pressures. In this study, we compared several structural properties of contour, primary and tail feathers between two forest and two urban great tit <em>(Parus major)</em> populations. Our results show that the urban environment affects only a few structural properties of feathers and only in the plumage of first-year birds. We found that both the plumulaceous and the pennaceous parts of their contour feathers are longer and have lower barb density in the urban than in the forest habitat. We also found that the primaries of first-year birds have narrower rachis and higher barbule density in the cities than in the forests, but there were no differences in other wing feather traits and in any tail feather traits between habitats. We did not find differences in the feather structure of urban versus forest adult birds. The habitat differences in first-year birds may indicate nutritional constraints or the effects of the warmer microclimate of the urban environment. These differences seem to disappear completely in adulthood that can be explained by the selective mortality of first-year birds, or by adults being less sensitive than first-year birds to environmental effects during their molt.</p>
A microfluidic platform to investigate the role of mechanical constraints on tissue reorganization
<p>Movie 1: 40 minutes long timelapse (brightfield) of an aggregate aspired in a channel.<br> <br> Movie 2: 60 minutes long timelapse (two-photon microscopy) of an aggregate aspired in a channel.<br> <br> Movie 3: cell-cell junctions involved in cellular rearrangements in Supplementary Movie 2.<br> <br> Movie 4: aspiration and rapid relaxation experiment (two-photon microscopy).<br> <br> Movie 5: relaxation experiment after a long aspiration (two-photon microscopy).</p>
Supplementary material for "A collection of Constraint Programming models for the three-dimensional stable matching problem with cyclic preferences"
<p>No external dependency is needed to compile the code, but MiniZinc is required to run it. Running the code without any argument will give the instructions.</p>
Replication package for: Hours Constraints, Occupational Choice, and Gender: Evidence from Medical Residents
<p>This is the replication package for:</p> <p>Wasserman, Melanie (forthcoming) "Hours Constraints, Occupational Choice, and Gender: Evidence from Medical Residents" Review of Economic Studies</p> <p>It contains:</p> <ul> <li>README file</li> <li>do files to reproduce the main tables and figures</li> <li>data files for all reproducible analyses</li> <li>all reproducible results</li> </ul>
Tracer and Observationally Derived Constraints on Diapycnal Diffusivities in an Ocean State Estimate
<p>Data used to generate figures in Trossman et al. (2022) in Ocean Science</p>
Elemental and S isotopic composition data for "Sulfur isotopic fractionation of the youngest Chang'e-5 basalts: Constraints on the magma degassing and geochemical features of the mantle source"
<p>Data for "Sulfur isotopic fractionation of the youngest Chang'e-5 basalts: Constraints on the magma degassing and geochemical features of the mantle source".</p>
Data underlying the publication: Callisto's atmosphere: First evidence for H2 and constraints on H2O
<p>We explore the parameter space for the contribution to Callisto's H corona observed by the Hubble Space Telescope (Roth et al. 2017a) from sublimated H<sub>2</sub>O and radiolytically produced H<sub>2</sub> using the Direct Simulation Monte Carlo (DSMC) method. The spatial morphology of this corona produced via photo- and magnetospheric electron impact-induced dissociation is described by tracking the motion of and simulating collisions between the hot H atoms and thermal molecules including a near-surface O<sub>2</sub> component. Our results indicate that sublimated H<sub>2</sub>O produced from the surface ice, whether assumed to be intimately mixed with or distinctly segregated from the dark non-ice or ice-poor regolith, cannot explain the observed structure of the H corona. On the other hand, a global H<sub>2</sub> component can reproduce the observation, and is also consistent with enhanced electron densities observed at high altitudes by <em>Galileo</em>'s plasma-wave instrument (Gurnett et al. 1997, 2000), providing the first evidence of H<sub>2</sub> in Callisto's atmosphere. The range of H<sub>2</sub> surface densities explored, under a variety of conditions, that are consistent with these observations is ∼(0.4-1)×10<sup>8</sup> cm<sup>-3</sup>. The simulated H<sub>2</sub> escape rates and estimated lifetimes suggest that Callisto has a neutral H<sub>2</sub> torus. We also place a rough upper limit on the peak H<sub>2</sub>O number density (<∼10<sup>8</sup> cm<sup>-3</sup>), column density (<∼10<sup>15</sup> cm<sup>-2</sup>), and sublimation flux (<∼10<sup>12</sup> cm<sup>-2</sup> s<sup>-1</sup>), all of which are 1-2 orders of magnitude less than that assumed in previous models. Finally, we discuss the implications of these results, as well as how they compare to Europa and Ganymede.</p>
Data for "Crustal Structure Constraints From the Detection of the SsPp Phase on Mars"
<p>This file contains the event data for eight marsquakes used in the paper entilted "Crustal Structure Constraints From the Detection of the SsPp Phase on Mars" for publication in Earth and Space Science.</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.