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.
528
datasets available to search
ShareScore release 0.9.0
Dataset results
528 results for “SNAP”
InSAR stack of Western Cape, South Africa from Sentinel-1 ascending track 29 processed with SNAP
<p>A stack of unwrapped interferograms on Western Cape, South Africa.</p> <p>Sensor: Sentinel-1ascending track 29</p> <p>Time: 2019.03.03 - 2019.05.14, 7 acquisitions, 15 interferograms</p> <p>Processor: SNAP (accessed on 14 July 2019)</p> <p>Tropospheric delay estimated from ERA-5 using PyAPS is attached.</p> <p>This is an input dataset for the time series analysis with <a href="https://github.com/insarlab/MintPy/">MintPy</a>.</p>
Fig. 3 in A new western Atlantic snapping shrimp of the Alpheus macrocheles group (Caridea, Alpheidae) revealed by morphological, molecular and color data
Fig. 3. Alpheus ramosportoae sp. nov., paratype, ♂, from seamounts of the North Chain, Ceará, northeastern Brazil (MOUFPE 13703). A. Second pereiopod, lateral view. B. Third pereiopod, lateral view. C. Fourth pereiopod, lateral view. D. Fifth pereiopod, lateral view. E–G. Third to fifth pereiopods, detail of propodus, lateral view. H–I. Third and fourth pereiopods, detail of dactylus. Scale bars: A–G = 0.5 mm; H–I = 0.25 mm.
Fig. 1 in A new western Atlantic snapping shrimp of the Alpheus macrocheles group (Caridea, Alpheidae) revealed by morphological, molecular and color data
Fig. 1. Alpheus ramosportoae sp. nov. A–D. Holotype, ♂, from off Recife, state of Pernambuco, northeastern Brazil (MOUFPE 19470). A. Carapace and cephalic appendages, dorsal view (setae omitted). B. Same, lateral view. C. Tooth on ventromesial carina of antennular peduncle. D. Left mandible, mesial view. E–L. Paratype, ♂, from seamounts of the North Chain, Ceará, northeastern Brazil (MOUFPE 13703). E. First maxilla, lateral view. F. Second maxilla, lateral view. G. First maxilliped, lateral view. H. Second maxilliped, lateral view. I. Third maxilliped, lateral view. J. Telson and uropods, dorsal view (setae omitted). K. Uropod, detail of the distolateral angle of the exopod. L. Uropod, detail of the posteerior margin of endopod. Scale bars: A–B, J = 1 mm; C–I, K–L = 0.5 mm.
Heat wave and cold snap event library under various technical choices for NERC subregions in the conterminous U.S. (1980 - 2024)
<p>This <strong>Extreme Thermal Event Library</strong> provides comprehensive records of heat wave and cold snap events from 1980 to 2024, aggregated at the North American Electric Reliability Corporation (NERC) subregion level for the conterminous United States. A map of NERC subregions with county-level mean temperatures is included in the file <strong>'NERC_subregions_with_mean_temperature.tif'</strong>.</p> <p>The heat wave and cold snap events were identified using temperature data simulated by the Thermodynamic Global Warming (TGW) model. The raw TGW hourly temperature data (at a 12-km resolution) was aggregated to the county level using spatial averaging within county boundaries. Daily mean, maximum, and minimum temperatures were then derived from the hourly surface air temperature data for each county. Subsequently, the county-level daily temperatures were spatially aggregated to the NERC subregion level using three distinct spatial aggregation methods:</p> <ol> <li><strong>Simple Mean (SM)</strong>: A simple average of county-level temperatures.</li> <li><strong>Area-Weighted Mean (MWA)</strong>: Weighted by the area of each county.</li> <li><strong>Population-Weighted Mean (MWP)</strong>: Weighted by the population of each county.</li> </ol> <p>The database includes separate zipped files for each spatial aggregation method:</p> <ul> <li><strong>"heat_wave_library_NERC_average.zip"</strong> and <strong>"cold_snap_library_NERC_average.zip"</strong> contain events based on the SM method.</li> <li><strong>"heat_wave_library_NERC_average_area.zip"</strong> and <strong>"cold_snap_library_NERC_average_area.zip"</strong> contain events based on the MWA method.</li> <li><strong>"heat_wave_library_NERC_average_pop.zip"</strong> and <strong>"cold_snap_library_NERC_average_pop.zip"</strong> contain events based on the MWP method.</li> </ul> <p>Each zipped file includes 12 event libraries, corresponding to 12 different event definitions. Details about these definitions are provided in the file <strong>'Event definitions.docx'</strong>.</p> <p> </p> <h3><strong>Event Library Structure</strong></h3> <p>Each row in an event library represents one detected thermal event. The columns in the library are defined as follows:</p> <ul> <li><strong>start_date</strong>: Start date of the event.</li> <li><strong>end_date</strong>: End date of the event.</li> <li><strong>centroid_date</strong>: The centroid date, calculated as the midpoint between the start and end dates.</li> <li><strong>highest_temperature / lowest_temperature</strong>: The highest daily maximum temperature (for heat waves) or lowest daily minimum temperature (for cold snaps), in Kelvin.</li> <li><strong>duration</strong>: Duration of the event in days.</li> <li><strong>NERC_ID</strong>: Identifier for the NERC subregion.</li> <li><strong>spatial_coverage</strong>: The spatial coverage of the event within the NERC subregion, expressed as the percentage of counties experiencing the event relative to the total number of counties in the subregion.</li> </ul>
Fig. 1 in A New Record Of The Snapping Shrimp, Alpheus Lobidens, From The Iraqi Coast (Malacostraca, Decapoda, Alpheidae)
Fig. 1. Sampling site north west of the Persian-Arabian Gulf: 1 — Fao site1, 2 — Fao sit2 breakwaters, 3 — Khor Abdullah, 4 — Khor Al-Zubair and 5 — Shatt Al-Basrah Canal.
Fig. 2 in A New Record Of The Snapping Shrimp, Alpheus Lobidens, From The Iraqi Coast (Malacostraca, Decapoda, Alpheidae)
Fig. 2. Alpheus cf. lobidens De Haan, 1849: A — male from Iraqi coast, (MSC.233) lateral view; B — major chela of male, C — major chela of male, fingers opened to show the plunger. Photographs by M. D. Naser.
Weapon performance and contest assessment strategies of the cavitating snaps in snapping shrimp
<p class="MsoNormal">Animals compete in contests over limited resources. Contestants forfeit once they ascertain that their opponent has greater resource holding potential (RHP) (mutual assessment) or once they reach a threshold of costs (self assessment). Functional scaling studies of contest behavior performance can inform how assessment signals, offensive capacity, and endurance scale with RHP and thereby elucidate the mechanisms through which each of these assessment types operate. Here, we performed behavioral contest analyses to determine the assessment strategies used in snapping shrimp (<em>Alpheus heterochaelis</em>) contests. Then, we used biomechanical measurements of a common contest behavior to inform how assessment might operate. We were specifically interested in the snapping behavior during which snapping shrimp fire imploding cavitation bubbles – hereafter, "snaps" – at their opponents. We showed that <em>A. heterochaelis</em> use mutual assessment early in contests. Then, when they fire snaps, they switch to cumulative assessment – a type of self assessment where contestants endure costs from their own behaviors (e.g. energy) and their opponent's (e.g. injury). Because larger individuals tend to win contests, we then tested how the maximum performance and endurance of snaps scaled with size. We measured the average angular velocity of the snapping dactyl, cavitation bubble duration, and pressure of snaps as metrics of performance. We measured 10 snaps per individual (n = 76 individuals). From this series of 10 snaps, we calculated the maximum of each metric as the maximum performance and the attrition of each metric over the course of ten snaps as a measure of endurance. Maximum performance increased with size, but endurance did not. This suggests that cumulative assessment in snapping shrimp is driven by opponent-imposed costs. Our results are not consistent with self-assessment based on endurance; however, the experiment could not fully replicate the quick succession of snaps fired in real contests. Future experiments should better replicate the rapid firing of snaps to test if endurance matters in a more ecologically relevant context. Our framework of integrating biomechanics and behavioral ecology provide a pathway to identify precise mechanisms of contest assessment and animal behavior more broadly.</p>
Responsiveness to cold snaps by turtle embryos depends on exposure timing and duration
<p>Characterizing how organisms respond to transient temperatures may further our understanding of their susceptibility to climate change. In animals with temperature-dependent sex determination (TSD), unusual transient temperatures during incubation result in sex bias and may therefore impair population breeding capacity. Past studies in the red-eared slider turtle (<em>Trachemys scripta</em>) have demonstrated that the timing and duration of heat exposure ("heat waves") can have major implications for the response of genes involved in gonadal development and the production of female hatchlings. Yet, no study has considered how the response of these genes to transient cold exposure ("cold snaps") may affect gene expression and influence the resulting production of males.</p> <p>We investigated how cold snap timing and duration affect gonadal gene expression in <em>T. scripta</em> embryos. Additionally, we explored the effect of early cold snap exposure duration on resulting hatchling sex ratios. Results show that responsiveness to cool temperatures changes rapidly across development, such that genes that responded to cold snaps when exposure began on incubation day 14 responded differently when cold exposure occurred just 4 to 8 days later. The sex ratio experiment revealed that embryos experiencing an early cold snap also require a long exposure (> 20 days) before most commit to testis development, further suggesting that early development under warm temperatures may lower their sensitivity to later cold snaps. These results highlight how individual responses to incubation temperature can change rapidly across development in turtles and have important effects on sex ratios. We discuss how variation in responsiveness to transient temperatures might help maintain mixed-sex ratios under variable thermal conditions in nature and may permit adaptive population responses to climate change.</p>
Supporting data for "Snap happy: camera traps are an effective sampling tool when compared to alternative methods"
<p>Author recommendations and response ratios extracted from studies comparing camera traps to another survey method. These data underlie the analyses in a the journal article 'Snap happy: camera traps are an effective sampling tool when compared to alternative methods', published in the journal Royal Society Open Science (https://doi.org/10.1098/rsos.181748). </p>
Figure 1 in Efficiency of pitfall traps and snap traps in small terrestrial mammals depends on their diet composition
Figure 1. RDA biplot (first two axes) summarizing the effect of sampling method (triangles) on community composition (arrows) of small mammals. The first two eigenvalues were 0.23 and 0.36, respectively.
Linked collectors and determiners for: Alpheus naranjo, a new brightly coloured snapping shrimp from the Caribbean coast of Panama (Malacostraca, Decapoda, Alpheidae).
Natural history specimen data linked to collectors and determiners held within, "Alpheus naranjo, a new brightly coloured snapping shrimp from the Caribbean coast of Panama (Malacostraca, Decapoda, Alpheidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/ce0ab832-46b8-40e9-8aaa-9ca99ab24f32">https://bionomia.net/dataset/ce0ab832-46b8-40e9-8aaa-9ca99ab24f32</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ce0ab832-46b8-40e9-8aaa-9ca99ab24f32">https://gbif.org/dataset/ce0ab832-46b8-40e9-8aaa-9ca99ab24f32</a>. Formatted as a Frictionless Data package.
Tradeoffs and benefits explain scaling, sex differences, and seasonal oscillations in the remarkable weapons of snapping shrimp (Alpheus spp.)
<p>Evolutionary theory suggests that individuals should express costly traits at a magnitude that optimizes the cost-benefit ratio for the trait-bearer. Trait expression varies across a species because costs and benefits vary among individuals. For example, if large individuals pay lower costs than small individuals, then larger individuals should reach optimal cost-benefit ratios at a greater magnitude of trait expression. Using the remarkable cavitation-shooting weapons found in the big claws of male and female alpheid snapping shrimp, we test whether size- and sex-dependent expenditures explain the scaling of weapon size relative to body size and why males have larger proportional weapon size than females. We found that males and females from three snapping shrimp species (<em>Alpheus</em> <em>heterochaelis</em>, <em>Alpheus</em> <em>angulosus</em>, and <em>Alpheus</em> <em>estuariensis</em>) exhibit resource allocation tradeoffs between weapon and abdomen mass. For male <em>A</em>. <em>heterochaelis</em>, the species for which we had the greatest sample size and statistical power, the smallest individuals showed the steepest tradeoff. Our extensive dataset in <em>A</em>. <em>heterochaelis</em> also included data about pairing, breeding season, and egg clutch size. Therefore, we could test for reproductive tradeoffs and benefits in this species. Female <em>A</em>. <em>heterochaelis</em> exhibited additional tradeoffs between weapon size and egg count, average egg volume, and total egg mass volume. For average egg volume, the smallest females exhibited the steepest tradeoff relative to weapon size. Furthermore, for both sexes, large weapons were positively correlated with the relative size of their pair mate; however, for males only, large weapons were positively correlated with being paired in the first place. In conclusion, we establish that size-dependent tradeoffs underlie reliable scaling relationships of costly traits. Furthermore, we show that males and females differ in weapon investment, suggesting that weapons are especially beneficial to males and especially burdensome to females.</p>
SNAPPING PSI surface motion measurements over selected sites presented in MDPI Remote Sensing paper "SNAPPING Services on the Geohazards Exploitation Platform for Copernicus Sentinel-1 Surface Motion Mapping"
<p>SNAPPING PSI surface motion measurements over selected sites as presented in the paper with the title "SNAPPING Services on the Geohazards Exploitation Platform for Copernicus Sentinel-1 Surface Motion Mapping" by Michael Foumelis, Jose Manuel Delgado Blasco, Fabrice Brito, Fabrizio Pacini, Elena Papageorgiou, Panteha Pishehvar and Philippe Bally on Remote Sensing Open Access Journal.</p> <p>Whenever using this dataset, please cite its original paper (<a href="https://doi.org/10.3390/rs14236075">https://doi.org/10.3390/rs14236075</a>) and include the reference to this dataset (<a href="https://doi.org/10.5281/zenodo.7369653">https://doi.org/10.5281/zenodo.7369653</a>).</p> <p>This dataset includes average Line-of-Sight velocities for the following sites and dates:</p> <table> <tbody> <tr> <td><strong>Site name</strong></td> <td><strong>Country</strong></td> <td><strong>Period</strong></td> <td><strong>Relative orbit</strong></td> <td><strong>Orbit direction</strong></td> </tr> <tr> <td>Cap-Haïtien</td> <td>Haiti</td> <td>Jan-2017 / Dec-2019</td> <td>106</td> <td>ascending</td> </tr> <tr> <td>Gran Renaissance Ethiopian Dam</td> <td>Ethiopia</td> <td>Jan-2019 / Jun-2021</td> <td>50</td> <td>descending</td> </tr> <tr> <td>La Palma Volcano</td> <td>Spain</td> <td>Jun-2019 / Dec-2021</td> <td>169</td> <td>descending</td> </tr> <tr> <td>Santorini Volcano</td> <td>Greece</td> <td>Apr-2015 / May-2021</td> <td>29</td> <td>ascending</td> </tr> <tr> <td>San Francisco</td> <td>USA</td> <td>Jan-2016 / Dec-2020</td> <td>115</td> <td>descending</td> </tr> <tr> <td>Thessaloniki International Airport (SKG)</td> <td>Greece</td> <td>Apr-2015 / Dec-2020</td> <td>102</td> <td>ascending</td> </tr> </tbody> </table>
Developing elastic mechanisms: Ultrafast motion and cavitation emerge at the millimeter scale in juvenile snapping shrimp
<p>Organisms such as jumping froghopper insects and punching mantis shrimp use spring-based propulsion to achieve fast motion. Studies of elastic mechanisms primarily focus on fully developed and functional mechanisms in adult organisms. However, the ontogeny and development of these mechanisms can provide important insights into lower size limits of spring-based propulsion, the ecological or behavioral relevance of ultrafast movement, and the scaling of ultrafast movement. Here we examine the development of the spring-latch mechanism in the big claw snapping shrimp, <em>Alpheus</em> <em>heterochaelis</em> (Alpheidae). Adult snapping shrimp use an enlarged claw to produce high-speed strikes that generate cavitation bubbles. However, until now, it was unclear when the elastic mechanism emerges during development and whether juvenile snapping shrimp can generate cavitation at this size. We reared <em>A</em>. <em>heterochaelis</em> from eggs, through their larval and postlarval stages. Starting one month after hatching, the snapping shrimp snapping claw gradually developed a spring-actuated mechanism and began snapping. We used high-speed videography (300,000 frames s<sup>-1</sup>) to measure juvenile snaps. We discovered that juvenile snapping shrimp generate the highest recorded accelerations (5.8x10<sup>5</sup> ± 3.3x10<sup>5</sup> m s<sup>-2</sup>) for repeated use and underwater motion and are capable of producing cavitation at the millimeter scale. The angular velocity of snaps did not change as juveniles grew; however, juvenile snapping shrimp with larger claws produced faster linear speeds and generated larger, longer-lasting cavitation bubbles. These findings establish the development of the elastic mechanism and cavitation in snapping shrimp and provide insights into early life-history transitions in spring-actuated mechanisms.</p>
Developing elastic mechanisms: Ultrafast motion and cavitation emerge at the millimeter scale in juvenile snapping shrimp
Open the record for dataset details and reuse information.
Responsiveness to cold snaps by turtle embryos depends on exposure timing and duration
Open the record for dataset details and reuse information.
Weapon performance and contest assessment strategies of the cavitating snaps in snapping shrimp
Open the record for dataset details and reuse information.
Tradeoffs and benefits explain scaling, sex differences, and seasonal oscillations in the remarkable weapons of snapping shrimp (Alpheus spp.)
Open the record for dataset details and reuse information.
Snaps of a tiny amphipod push the boundary of ultrafast, repeatable movement
<p>Surprisingly, the fastest motions are not produced by large animals or robots. Rather, small organisms or structures, including cnidarian stinging cells, fungal shooting spores, and mandible strikes of ants, termites, and spiders hold the world acceleration records. These diverse systems share common features: they rapidly convert potential energy - stored in deformed material or fluid - into kinetic energy when a latch is released. However, the fastest and smallest known movements often cannot be used multiple times, because mechanical components are broken or ejected. Furthermore, some of these systems must overcome the added challenge of moving in water, where high density and viscosity constrain acceleration at small sizes. Here we report the kinematics of repeatable, ultrafast snaps by tiny marine amphipods (<em>Dulichiella</em> cf. <em>appendiculata</em>). Males use their enlarged major claw, which exceeds 30% of body mass, to snap a 1 mm-long dactyl with a diameter equivalent to a human hair (184 µm). The claw snaps closed extremely rapidly, averaging 93 µs, 17 m s-1 and 2.4 x 105 m s-2. These snaps are among the smallest and fastest-moving of any documented repeatable movement and are sufficiently fast to operate in the inertial hydrodynamic regime (Re >10,000). They generate audible pops and rapid water jets, which occasionally yield cavitation, and may be used for defense. These amphipod snaps push the boundaries of acceleration and size for repeatable movements, particularly in water, and exemplify how new biomechanical insights can arise from unassuming animals.</p>
SARWIND LG-Mod (v4.01) output data with reference to the Sentinel-1A (2014/12/07, Camargue), EW, GRD, MR, VV-polarized, descending orbit, SNAP pre-processed data (+ the additional SKYRON reference wind)
<p>A zipped folder containing SARWIND LG-Mod (v4.01) output data obtained by processing the Sentinel-1A (2014/12/07, Camargue), EW, GRD, MR, VV-polarized, descending orbit, SNAP pre-processed data (+ the additional SKYRON reference wind).</p> <p>Pre-processed data derived from the Sentinel-1 SAR image have been obtained by using the Sentinel Application Platform (SNAP), ver. 3.0.3, distributed by the European Space Agency (ESA). The reference wind components have been provided by the Numerical Weather Model (NWM) SKYRON.</p> <p>These Earth Observation (EO) data have been used as inputs to the SARWIND LGMod algorithm, ver. 4.01, developed by Rana Fabio Michele (2014-2016) for the sea surface wind field retrieval.</p> <p>The available Sentinel-1, Extra Wide Swath Mode, Ground Range, Multi-look, Detected, Medium Resolution, Vertical polarisation on transmit, Vertical polarisation on receive, Descending orbit, C-band SAR image, has been acquired on the 7th Dec 2014, 05:51:54.</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.