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2,214 results for “Walls”
Out from under the wing: reconceptualizing the insect wing gene regulatory network as a versatile, general module for body-wall lobes in arthropods
<p>Body plan evolution often occurs through the differentiation of serially homologous body parts, particularly in the evolution of arthropod body plans. Recently, homeotic transformations resulting from experimental manipulation of gene expression have been interpreted as evidence that portions of dorsal and lateral arthropod body-wall are serially homologous to wings. These results, along with comparative data on the expression and function of genes in the wing regulatory network, provided a new perspective on an old question in insect evolution—how did the insect wing, evolve? A proposed ancestral role for the wing regulatory network in patterning body-wall margins motivated a broader comparison of gene function in wings and body-wall. We investigated the roles of a suite of ten wing- and body-wall related genes in a hemimetabolous insect, Oncopeltus fasciatus. Our results indicate that genes involved in wing development in O. fasciatus play similar roles in the development of adult body-wall flattened cuticular evaginations. We found extensive functional similarity between the development of wings and other bilayered evaginations of the body wall. Overall, our results support the existence of a versatile development module for building bilayered cuticular epithelial structures, which may have played a central role in the evolution of wings.</p>
FIG. 5 in New species and new status of Urophyllum Wall. (Rubiaceae) from Cambodia and Viêtnam
FIG. 5. — Isotype of Urophyllum bidoupense Yooprasert, Culham & Utteridge, sp. nov.
Robustness of organ morphology is associated with modules of co-expressed genes related to plant cell wall
<p>Reproducibility in organ size and shape is a fundamental trait of living organisms. The mechanisms underlying such robustness remain, however, to be elucidated. In the manuscript <a href="https://www.biorxiv.org/content/10.1101/2022.04.26.489498v1"><strong>"Robustness of organ morphology is associated with modules of co-expressed genes related to plant cell wall", </strong>doi: https://doi.org/10.1101/2022.04.26.489498</a>, we took the sepal of Arabidopsis as a model, and we investigated whether variability of gene expression plays a role in variation of organ morphology.</p> <p>To address this question, we produced a dataset composed of both transcriptomic and morphological information obtained from 27 individual sepals from wild-type plants.</p> <p>This repository contains the raw confocal image of 30 sepals used as starting point for the analysis, as well as their extracted contours as binary images. These images were used to recover the 3D shape of the sepals.</p> <p>The 30 abaxial sepals were collected at early stage 11, from three different Col-0 wild-type plants, labeled D, E and F, grown simultaneously in experimentally controlled standard conditions. Each sepal was imaged under a confocal microscope using autofluorescence. Immediately following imaging, the sepal was frozen in liquid nitrogen for RNA extraction, on which an RNA-seq analysis was performed.</p> <p><strong>Related informations :</strong></p> <ul> <li>The repository of the numerical tools used for 3D shape extraction as well as the results of geometrical measurements is <a href="http://forge.cbp.ens-lyon.fr/redmine/projects/florivar">here</a>.</li> <li>The repository of RNA-Seq analysis results of these same sepals is here.</li> <li>And the analysis tools used to relate geometrical measurements to RNA-seq data are here.</li> </ul>
Shield wall: Kelps are the last stand against corals in tropicalised reefs
<p>Communities inhabiting biogeographic transition zones are shifting in composition as a result of progressive warming and heatwaves. In the marine environment, corals are expanding onto higher latitude reefs historically dominated by temperate kelp forests, initiating a shift towards warm-affinity coral dominated states. Although these coral expansions are a global phenomenon, the mechanisms that are underpinning the expansion process remain poorly understood, which limits the projections of the rate and extent of ecosystem reconfiguration. Here, we investigated the interaction between the kelp Ecklonia radiata and the high latitude scleractinian coral Plesiastrea versipora in several of Western Australia's temperate reefs, where coral colony abundance has increased by 50% in recent years. Combining field surveys with field and laboratory experiments, we test the importance of physical (abrasion and light reduction) and chemical (allelopathic effects) effects of kelp canopies on coral tissue cover, photosynthetic parameters, and calcification rates. In the field, kelp cover had a negative effect on coral density that was overwhelming in comparison to other dominant macroalgal taxa. Abrasion by kelp whiplash was the predominant mechanism by which kelp exerted a negative effect on P. versipora fitness, scraping up to 80% of live coenosarc from experimental colonies. In contrast, canopies had no effects on P. versipora photochemical efficiency and laboratory incubations showed that there were no allelochemical effects from kelp on P. versipora. We conclude that E. radiata inhibits P. versipora establishment and development through abrasion, and the survey data confirmed that recent climate-driven kelp loss released corals from this effect, facilitating their expansion on high-latitude reefs in Western Australia. This shows how competitive interactions actively shield against species expansion in biogeographic transition zones and suggests a continued decline of kelp canopies will increase the permeability of temperate reefs to warm affinity species such as scleractinian corals.</p>
From performance curves to performance surfaces: Interactive effects of temperature and oxygen availability on aerobic and anaerobic performance in the common wall lizard
<p>1. Accurately predicting the responses of organisms to novel or changing environments requires the development of ecologically-appropriate experimental methodology and process-based models.</p> <p>2. For ectotherms, thermal performance curves (TPCs) have provided a useful framework to describe how organismal performance is dependent on temperature. However, this approach often lacks a mechanistic underpinning, which limits our ability to use thermal performance curves predictively. Further, thermal dependence varies across traits, and performance is also limited by additional abiotic factors, such as oxygen availability.</p> <p>3. We test a central prediction of our recent Hierarchical Mechanisms of Thermal Limitation (HMTL) Hypothesis which proposes that natural hypoxia exposure will reduce maximal performance and cause the thermal performance curve for whole-organism performance to become more symmetrical.</p> <p>4. We quantified thermal performance curves for two traits often used as fitness proxies, sprint speed and aerobic scope, in lizards under conditions of normoxia and high-elevation hypoxia.</p> <p>5. In line with the predictions of HMTL, anaerobically-fueled sprint speed was unaffected by acute hypoxia while the TPC for aerobic scope became shorter and more symmetrical. This change in TPC shape resulted from both the maximum aerobic scope and the optimal temperature for aerobic scope being reduced in hypoxia as predicted.</p> <p>6. Following these results, we present a mathematical framework, which we call Temperature-Oxygen Performance Surfaces (TOPS), to quantify the interactive effects of temperature and oxygen on whole-organism performance in line with the HMTL hypothesis. This framework is transferrable across traits and levels of organization to allow predictions for how ectotherms will respond to novel combinations of temperature and other abiotic factors, providing a useful tool in a time of rapidly changing environmental conditions.</p>
Experimental data: Low-velocity out-of-plane impact tests on double-wythe unreinforced brick masonry walls instrumented with optical measurements
<p>This dataset includes the results of laboratory impact tests conducted on natural-scale double-wythe unreinforced brick masonry walls. The walls were spanning vertically between two reinforced concrete slabs and were subjected to low-velocity drop-weight pendulum tests in which they were repeatedly hit until the opening of a breach in the center of the wall. The tests were instrumented with both hard-wired and optical measurements, the latter consisting of high-speed cameras and digital image correlation techniques. Investigated in these tests were the out-of-plane response of the walls and their capacity to resist the impacts. The axial load applied on the top of the walls was varied for two wall configurations and monitored throughout the tests to study the effect of arching on the failure mechanism produced and number of repeated hits needed to open the breach. Of interest was also the evidence of cracking, more specifically the way it initiated on the undamaged walls and next propagated upon consecutive hits. </p> <p>The data generated from the tests is made here available and documented to support further investigations on masonry structures subjected to extreme actions. The dataset includes four ZIP files, ordered from 01 to 05, along with an auxiliary PDF document describing the content and organization of the data. </p> <p>Test implementation and test results that are built upon this data are presented and discussed in the following research article:</p> <blockquote> <p><a href="https://www.sciencedirect.com/science/article/pii/S0734743X23001082?via%3Dihub">Godio M, Flansbjer M, Williams Portal N (2023) Low-velocity out-of-plane impact tests on double-wythe unreinforced brick masonry walls instrumented with optical measurements, International Journal of Impact Engineering</a></p> </blockquote> <p>To cite this data in your work please refer to the article.</p> <p>The Authors</p>
Thermal design and full-scale thermal response test on Energy Walls
<p>This folder contains a spreadsheet that includes the underlying data referred to the publication mentioned in the title.</p> <p>For each figure, the underlying data are listed in a dedicated sub-sheet.</p>
An experimental investigation on the water retention behaviour of a silty soil for the computation of the lateral earth thrust on a retaining wall.
<p>The dataset is linked with the conference paper available open access with the same title. In the excel file, each spreadsheet reports the data of the figures available in the manuscript.</p>
Old concrete industrial wall
One half of a block of lime kilns at the old Warkworth Cement Factory, near Auckland, New Zealand, that closed in the late 1920s. I managed to scan inside one of the 18 brick chimneys. My 3D model from photos generated with photogrammetry software 3DF Zephyr v5.019 processing 113 images Source: Objaverse 1.0 / Sketchfab
Early Diamond meets a late Wall
Crown Hall, Mies van der Rohe, 1956 Villa Savoye, Le Corbusier, 1931 Wall House, John Hejduk, 1973 Source: Objaverse 1.0 / Sketchfab
Tealing Church Wall Version 2
This is the southern wall of the Tealing Parish Church. The sculpture in the centre is made of sandstone and has not weathered very well due to the Scottish climate. There are a number of other stones close to the wall but no explanation as to why they are there. The mesh on this version has been decimated to allow quicker loading. Photographed and Modelled by Simon Goulding, Dundee Howff Conservation Group Source: Objaverse 1.0 / Sketchfab
London Roman Wall at All-Hallows-On-The-Wall
A section of London's Roman and later wall located outside All-Hallows-On-The-Wall Church on London Wall (road). https://historicengland.org.uk/listing/the-list/list-entry/1002067 78 photos taken in July 2013 with a Sony Nex-3 and processed in Agisoft Metashape. Source: Objaverse 1.0 / Sketchfab
Stone Wall Nr.6
Stone Wall with plants, moss and some lichen, 60 photos processed with Photoscan. It is a small part of Stone Wall Nr.5 Source: Objaverse 1.0 / Sketchfab
Arivurichardich - Name & Date On Wall
Arivurichardich is a remote mid 19 th century croft consisting of a shepherd's cottage and adjoining sheepfank on the slopes of Meall Odhar, in the hills to the N of Callandar. The complex has a significant effect upon the spectacular landscape, visible on the mountainside from far down the valley from which it is approached. Modern farming practises are less likely to use these distant fanks and are therefore becoming more rare. The sheepfank is fairly large, and the walls (ruinous) that enclose the fank and cottage form a rare and reasonably complete example of a remote sheep station. A grade C listed building. This carving is on the N facing gable wall. It reads 1844 John Fisher(?). The cottage is on the Drummond Estates and is used as a private bothy by the Stovie Club. It is kept securely locked. Grid Ref : NN 64254 13767 Source: Objaverse 1.0 / Sketchfab
Wall vol3
Newcastle upon Tyne town defences: section of curtain wall including Durham Tower and section of town ditch. Source: Objaverse 1.0 / Sketchfab
London Roman Wall At Tower Hill
Ruined section of London Roman Wall near Tower Hill underground station. https://historicengland.org.uk/listing/the-list/list-entry/1357518 Source: Objaverse 1.0 / Sketchfab
Stone Wall 3
Old stone wall in Cornwall Park, Auckland, New Zealand. My 3D model generated with photogrammetry software 3DF Zephyr v5.019 processing 50 images Source: Objaverse 1.0 / Sketchfab
Gypsum wall panel relief, Nimrud
Gypsum wall panel relief: in the upper register, a line of Assyrian warriors moves ⇦. On the right, an Assyrian soldier wearing a mail-shirt over the tunic decorated with the fringed border hanging down between his knees, and, as it seems, a helmet, pulls at the branches of a low tree. In front of it are six warriors, three slingers and before them, a man with round shield and dagger, all similarly dressed, except that the tunic of the shield-bearer is richly ornamented with concentric squares. He follows a pair of warriors; the first, wearing a garment decorated with fringes and small discs put into squares, is an archer; the man partly hidden by him and wearing an ornamented tunic holds a dagger in his right hand. Dating to 728 BC, found in Tiglath-pileser III's Palace at Nimrud. Height: 272 centimetresLength: 239 centimetres Source: Objaverse 1.0 / Sketchfab
St Peter's Church,Cambridge; North Wall
The northern wall of the church showcases an excellent example of Medieval recycling of Roman building materials, with a series of Roman bricks being incorporated into the lower course of the wall. These bricks likely came from the former Roman wall of Cambridge, a section of which ran through where the adjacent Kettles Yard art gallery now sits. The rest of the building material is made up of flint rubble and Barnack stone, being of Medieval and Georgian origin. St Peter's Church is thought to have been built in the 12th-century, possibly with Anglo-Saxon origins. Most of the church seen today is Georgian and was heavily reconstructed in 1781 when the Norman nave and chancel were demolished and rebuilt following a long period of ruin. The Georgian reconstruction reused much of the original material, including Roman tiles and bricks robbed from the ruins of Roman Cambridge, including the once-adjacent 4th-century town wall. St Peter's Church is open daily from 10am-4pm. Source: Objaverse 1.0 / Sketchfab
Detailed wall
Detailed wall at Casa de Santa Maria's Chapel in Cascais. Used 18 images to captured it and built with 3DF Zephyr :D Source: Objaverse 1.0 / Sketchfab
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.