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3,264 results for “FAST”
Afrotropical secondary forests exhibit fast diversity and functional recovery, but slow compositional and carbon recovery after shifting cultivation
<p>Question: Human disturbance is increasingly affecting forest dynamics across the tropics. Forests can recover via natural secondary succession to pre-disturbance levels of biodiversity, species composition, and ecosystem carbon stocks. Central Africa will be subject to increasingly high shifting cultivation pressure in the next decades, but succession trajectories of these ecosystem properties are still poorly known for the Congo basin. We addressed two questions: (1) how does taxonomic and functional composition and diversity shift? (2) How fast do aboveground carbon stocks recover during secondary succession in tropical forests?</p> <p>Location: Central Congo basin</p> <p><span>Methods: We conducted an inventory of trees (DBH ≥10 cm diameter), measured species traits and soil texture and carbon content in 18 plots, located along six secondary succession stages (i.e. from agricultural to old growth forest sites). We measured tree diameter, height for 20% of trees distributed across diameter classes, wood traits from all species, and leaf traits from species that contributed to 85% of the plot basal area.</span></p> <p>Results: We showed that secondary forests recover relatively fast in terms of tree species diversity, alpha functional diversity, and fine root carbon, with near-old-growth forest values after six decades past disturbance, while floristic composition exhibited slower recovery. Secondary forests only partially shifted from acquisitive to a conservative life-history, with shifts in leaf traits being largely decoupled from wood traits. Only 43% of above-ground carbon recovered after 60 years of forest regrowth, potentially through a slow recovery of the large-sized tree stems that dominate carbon stocks of old-growth forests.</p> <p>Conclusions: Our findings underline the capacity of Afrotropical forests to recover species and alpha functional diversity after clear-cutting through shifting cultivation. Simultaneously, old-growth forests harbors a particular floristic community and store a large quantity of carbon with much longer recovery trajectories, stressing the need for conservation of these forests in the Congo Basin.</p>
Figs. 26–27 in New species of fast-running flies (Diptera: Empidoidea, Hybotidae, Tachydromiinae) from mangroves in Singapore
Figs. 26–27. Elaphropeza melanuroides, new species, male habitus: 26, lateral; 27, dorsal.
Fig. 35–36 in New species of fast-running flies (Diptera: Empidoidea, Hybotidae, Tachydromiinae) from mangroves in Singapore
Fig. 35–36. Elaphropeza pallida, new species, male habitus: 35, lateral; 36, dorsal.
Fig. 12 in New species of fast-running flies (Diptera: Empidoidea, Hybotidae, Tachydromiinae) from mangroves in Singapore
Fig. 12. Elaphropeza bakau, new species, male habitus lateral.
Figs. 1–2 in New species of fast-running flies (Diptera: Empidoidea, Hybotidae, Tachydromiinae) from mangroves in Singapore
Figs. 1–2. Elaphropeza albicornis, new species, male 1, habitus lateral; 2, habitus dorsal.
Supporting data for 'Fast universal quantum gate above the fault-tolerance threshold in silicon'
<p>Data supporting for paper 'Fast universal quantum gate above the fault-tolerance threshold in silicon'.</p> <p>All the data are stored in the HDF5 format that can be conveniently loaded by the xarray Python package.</p>
Reproduction package for the paper "Multi-dimensional population modelling using frbpoppy: Magnetars can produce the observed fast radio burst sky"
<p>This is a basic reproduction package for the paper "Multi-dimensional population modelling using frbpoppy: Magnetars can produce the observed fast radio burst sky" by David Gardenier & Joeri van Leeuwen (2021).</p> <p>* arXiv: <a href="https://arxiv.org/abs/2012.06396">arXiv:2012.06396</a><br> * DOI: <a href="https://doi.org/10.1051/0004-6361/202040119">10.1051/0004-6361/202040119</a></p> <p> </p>
byteSteady: Fast Classification Using Byte-Level n-Gram Embeddings - Gene Classification Dataset
<p>The gene classification dataset used in the <a href="https://arxiv.org/abs/2106.13302">byteSteady paper</a>.</p>
Helios fast solar wind stream observation times
<p>This record contains the dates, times and observing probe of fast solar wind streams observed by the two Helios spacecraft, used in a study of the radial variation of alpha particles in the solar wind</p> <p>stream_times.csv contains following columns:</p> <p>Start: Start time of each observed structure (UT)<br> End : End time of each observed structure (UT)<br> Probe : Observing probe of each structure (1 for Helios 1, 2 for Helios 2)</p>
Reproduction package for the paper 'Discovery of a probable very fast extragalactic nova in a symbiotic binary'
<p>This is a basic reproduction package (RP) for the paper "Discovery of a probable very fast extragalactic nova in a symbiotic binary". It aims to provide the most important data products to check and reproduce the main results of the paper, listing all software used and data archives containing the public data used.</p> <p>Authors: David Modiano, Rudy Wijnands</p> <p>Arxiv DOI: 2210.06057</p> <p>Paper DOI: 10.1051/0004-6361/202244679</p> <p>Accepted for publication in Astronomy and Astrophysics (date of acceptance: 11/10/2022)</p>
SIMCor - Demo of fast-to-evaluate surrogate models used for device implantation
<p>This video illustrates a fast to evaluate model for TAVI device implantation based on isogeometric analysis. The tissue is modelled in a rigid manner, meaning that no deformation can be caused by the device. The device deployment is modelled using an expanding cylinder and assessing the contacts between device and tissue. This approach allows rapid evaluation of the risk of paravalvular leakage for different device orientations.</p>
Data from: Surface Acoustic Wave-based Lab-On-a-Chip for the fast detection of Legionella pneumophila in water
<p><span>Surface acoustic wave (SAW) -based immuno-biosensors are used for several applications, thanks to their versatility and faster response than conventional analytical methods. SAW immuno-biosensors can be usefully applied to promptly detect bacteria and prevent bacterial infections that can lead to severe diseases. Here, we present a SAW immuno-biosensor to detect <em>Legionella</em> <em>pneumophila</em> in water. Our device, working at ultra-high frequency (740 MHz), is functionalized with an anti-<em>L</em>. <em>pneumophila</em> antibody to maximize the specificity. We report the characteristic curve of the sensor, calculated measuring bacterial samples at known densities, and its related parameters. We also measure <em>L</em>. <em>pneumophila</em> samples contaminated with different Gram-positive and Gram-negative bacterial species (<em>Escherichia</em> <em>coli</em> and <em>Enterococcus</em> <em>faecium</em>) and samples diluted in mains waters. The proposed device is able to detect <em>L</em>. <em>pneumophila</em> in the range from 1</span><span>×</span><span>10<sup>6</sup> to 1</span><span>×</span><span>10<sup>8</sup> CFU/mL, with a limit of blank of 1.22</span><span>×</span><span>10<sup>6</sup> CFU/mL and a limit of detection of 2.01</span><span>×</span><span>10<sup>6</sup> CFU/mL. The nonspecific signal due to contaminant bacteria is very limited and measurements of <em>L</em>. <em>pneumophila</em> are not affected by contamination. We obtain a good detection also in mains water, representing a realistic matrix for <em>L</em>. <em>pneumophila</em>. Our results are encouraging and pave the way to the use of fast, easy-to-use, reliable and precise sensors to prevent bacterial infections in human activities.</span></p>
Radiation Performance Data of the Fast-, Light-cured Plastic Scintillator Formulations
<p>This repository contains the waveforms from the CAEN DT5730 digitizer of the fast-, light-cured plastic scintillators for the different formulations used in the two level-factorial parameter study (AFIT101-130) and ethanol treatment study (AFIT220-230). Each scintillator was wrapped with two layers of MIL-T-27730A PTFE tape and coupled to a 2" Hamamatsu R7724 PMT biased at -1050 V. The signals were recorded using CAEN CoMPASS software on a CAEN DT5730 digitizer while the scintillators were exposed to Na-22, Cs-137, and AmBe radiation sources. Some of the scintillator formulations were measured more than once, but due to the limitations of the data that can be saved in this repository, not all the experimental data is included; however, this repository consists of the data closest to the average performance of each scintillator. Additionally, the EJ-276 dataset is included.<br> <br> The table below lists the weight percentage of the compounds in each scintillator formulations. The compounds for each formulation were weighed and placed into a 20 mL reaction vial. The compounds were thoroughly mixed together using an alternating combination of an ultrasonic bath and hot plate to gently warm the mixture. To reduce oxygen-induced quenching, the reaction vial was transferred to a glove box pressurized with a nitrogen atmosphere and dissolved oxygen was removed by sparging with nitrogen for 10 min. The reaction vial was sealed before removal from the glove box. Next, the resin solution was cured using a commercially-available 405 nm Formlabs Form Cure for 5 mins and Dymax BlueWave AX-550 VisiCure for 4 mins.<br> Finally, all solid scintillators were sanded and polished using 180 grit, 400 grit, 1000 grit, and 2000 grit sandpaper and a 300~nm alumina slurry.</p> <table> <tbody> <tr> <td>Scintillator</td> <td>DIN</td> <td>PPO</td> <td>Exalite</td> <td>IBOA</td> <td>HDDMA</td> <td>BPADMA</td> <td>TPO</td> </tr> <tr> <td>AFIT101</td> <td>-</td> <td>30</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT102</td> <td>10</td> <td>20</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT103</td> <td>20</td> <td>10</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT104</td> <td>30</td> <td>-</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT105</td> <td>-</td> <td>30</td> <td>0.2</td> <td>49</td> <td>14</td> <td>7</td> <td>0.1</td> </tr> <tr> <td>AFIT106</td> <td>10</td> <td>20</td> <td>0.2</td> <td>49</td> <td>14</td> <td>7</td> <td>0.1</td> </tr> <tr> <td>AFIT107</td> <td>20</td> <td>10</td> <td>0.2</td> <td>49</td> <td>14</td> <td>7</td> <td>0.1</td> </tr> <tr> <td>AFIT109</td> <td>-</td> <td>30</td> <td>0.2</td> <td>49</td> <td>7</td> <td>14</td> <td>0.1</td> </tr> <tr> <td>AFIT110</td> <td>10</td> <td>20</td> <td>0.2</td> <td>49</td> <td>7</td> <td>14</td> <td>0.1</td> </tr> <tr> <td>AFIT111</td> <td>20</td> <td>10</td> <td>0.2</td> <td>49</td> <td>7</td> <td>14</td> <td>0.1</td> </tr> <tr> <td>AFIT113</td> <td>-</td> <td>30</td> <td>0.2</td> <td>49</td> <td>-</td> <td>21</td> <td>0.1</td> </tr> <tr> <td>AFIT114</td> <td>10</td> <td>20</td> <td>0.2</td> <td>49</td> <td>-</td> <td>21</td> <td>0.1</td> </tr> <tr> <td>AFIT130</td> <td>15</td> <td>15</td> <td>0.2</td> <td>49</td> <td>10.5</td> <td>10.5</td> <td>0.1</td> </tr> <tr> <td>AFIT230</td> <td>-</td> <td>30</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT225</td> <td>5</td> <td>25</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT220</td> <td>10</td> <td>20</td> <td>0.2</td> <td>49</td> <td>21</td> <td>-</td> <td>0.1</td> </tr> <tr> <td>AFIT221</td> <td>10</td> <td>20</td> <td>0.2</td> <td>49</td> <td>14</td> <td>7</td> <td>0.1</td> </tr> </tbody> </table> <p>DIN: diisopropyl naphthalene<br> PPO: 2,5-diphenyloxazole<br> Exalite: Exalite 416<br> IBOA: isobornyl acrylate<br> HDDMA: difunctionized 1,6-hexanediol dimethacrylate<br> BPADMA: bisphenol-A dimethacrylate<br> TPO: diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide</p>
On the fast track: Hybrids adapt more rapidly than parental populations in a novel environment
<p>Rates of hybridization are predicted to increase due to climate change and human activity that cause redistribution of species and bring previously isolated populations into contact. At the same time, climate change leads to rapid changes in the environment, requiring populations to adapt rapidly in order to survive. A few empirical cases suggest hybridization can facilitate adaptation despite its potential for incompatibilities and deleterious fitness consequences. Here we use simulations and Fisher's Geometric model to evaluate the conditions and time frame of adaptation via hybridization in both diploids and haplodiploids. We find that hybrids adapt faster to new environments compared to parental populations in nearly all simulated scenarios, generating a fitness advantage that can offset intrinsic incompatibilities and last for tens of generations, regardless of whether the population was diploid or haplodiploid. Our results highlight the creative role of hybridization and suggest that hybridization may help contemporary populations adapt to the changing climate. However, adaptation by hybrids may well happen at the cost of reduced biodiversity, if previously isolated lineages collapse into one.</p>
Dataset for CFD4NRS-9 conference paper "Simulation of noble metal particle growth and removal in the molten salt fast reactor"
<p>Dataset used for the results presented in the CFD4NRS-9 conference paper "Simulation of noble metal particle growth and removal in the molten salt fast reactor". Also the code used to generate results is included (it is also publicly available at https://github.com/edofrederix/flotationFoam), and contains a README with instructions. The plots can be generated with their respective Python files.</p>
Unpaired fast- and slow-acquisition microCT scans of carbon-fibre-reinforced composites
<p>data.zip contains tomographic images of carbon-fibre-reinforced composites with <a href="https://www.toraycma.com/wp-content/uploads/T700S-Technical-Data-Sheet-1.pdf.pdf">Toray T700S</a> fibres in a <a href="http://sicomin.com/datasheets/product-pdf1123.pdf">Sicomin SR8500 KTA313</a> epoxy matrix.</p> <p>The datasets accompany the paper <a href="https://doi-org.remotexs.ntu.edu.sg/10.1016/j.compscitech.2023.110278" target="_blank" rel="noopener"><em>Deep-learning image enhancement and fibre segmentation from time-resolved computed tomography of fibre-reinforced composites</em></a>.</p> <p>They are used in a two-step process:<br>1) to train a 3DCycleGAN enhancement algorithm available on <a href="https://github.com/pvilla/3DCycleGaN">https://github.com/pvilla/3DCycleGaN</a>.<br>2) to train a UNetID segmentation algorithm available on <a href="https://github.com/CMG-KULeuven/UnetID-FibreSeg">https://github.com/CMG-KULeuven/UnetID-FibreSeg</a>.</p> <p>The tomograms were acquired at the TOMCAT Beamline at the Swiss Light Source in October 2021.</p> <p>Acquisition specifications:</p> <p>T700_GF_0p8um_1ms:</p> <ul> <li>detector: GigaFRoST</li> <li>effective voxel size: 800x800x800 nm³</li> <li># projections: 500</li> <li>exposure time: 1 ms</li> <li>total acquisition time: 500 x 1 ms = 0.5 s</li> <li>beam: polychromatic</li> <li>datasets: (same sample, different regions)<br>T700-T-21_GF_0p8um_1ms_1.h5<br>T700-T-21_GF_0p8um_1ms_2.h5<br>T700-T-21_GF_0p8um_1ms_3.h5</li> </ul> <p>T700_GF_1p6um_0p5ms:</p> <ul> <li>detector: GigaFRoST</li> <li>effective voxel size: 1600x1600x1600 nm³</li> <li># projections: 500</li> <li>exposure time: 0.5 ms</li> <li>total acquisition time: 500 x 0.5 ms = 0.25 s</li> <li>beam: polychromatic</li> <li>files: (same sample, different regions)<br>T700-T-21_GF_1p6um_0p5ms_1.h5<br>T700-T-21_GF_1p6um_0p5ms_2.h5</li> </ul> <p>T700_GF_1p6um_3ms:</p> <ul> <li>detector: GigaFRoST</li> <li>effective voxel size: 1600x1600x1600 nm³</li> <li># projections: 500</li> <li>exposure time: 3 ms</li> <li>total acquisition time: 500 x 3 ms = 1.5 s</li> <li>beam: polychromatic</li> <li>files: (same sample, different regions)<br>T700-T-21_GF_1p6um_3ms_1.h5<br>T700-T-21_GF_1p6um_3ms_2.h5<br>T700-T-21_GF_1p6um_3ms_3.h5<br>T700-T-21_GF_1p6um_3ms_4.h5<br>T700-T-21_GF_1p6um_3ms_5.h5</li> </ul> <p>T700_pco_0p4um:</p> <ul> <li>detector: pco.edge 5.5</li> <li>effective voxel size: 400x400x400 nm³ (scaled from 325x325x325 nm³)</li> <li># projections: 2000</li> <li>exposure time: 250 ms</li> <li>total acquisition time: 2000 x 250 ms = 500 s</li> <li>beam: 15 keV</li> <li>files: (different samples)<br>T700-T-02_pco_0p4um.h5<br>T700-T-08_pco_0p4um.h5<br>T700-T-21_pco_0p4um_reference.h5<br>T700-T-26_pco_0p4um.h5</li> </ul> <p>3DCycleGAN_trained_models.zip contains pre-trained models for the 3DCycleGAN enhancement algorithm.</p> <p>UnetID_trained_models.zip contains pre-trained models for the UNetID segmentation algorithm.</p>
Fasting increases investment in soma upon refeeding at the cost of gamete quality in zebrafish
<p>Fasting increases lifespan in invertebrates, improves biomarkers of health in vertebrates, and is increasingly proposed as a promising route to improve human health. Nevertheless, little is known about how fasted animals use resources upon refeeding, and how such decisions affect putative trade-offs between somatic growth and repair, reproduction, and gamete quality. Such fasting-induced trade-offs are based on strong theoretical foundations and have been recently discovered in invertebrates, but the data on vertebrates is lacking. Here we report that fasted female zebrafish, <em>Danio</em> <em>rerio</em>, increase investment in soma upon refeeding, but it comes at a cost of egg quality. Specifically, an increase in fin re-growth was accompanied by a reduction in 24-hours post-fertilization offspring survival. Refed males showed a reduction in sperm velocity and impaired 24-hour post-fertilisation offspring survival. These findings underscore the necessity of considering the impact on eggs and sperm when assessing evolutionary and biomedical implications of lifespan-extending treatments in females and males and call for careful evaluation of the effects of fasting (both during and post) on fertilisation.</p>
Assessment of Fast-Track pathway in hip and knee replacement surgery by propensity score matching on patient-reported outcomes
<p>This is the dataset accompanying the publication "Assessment of Fast-Track pathway in hip and knee replacement surgery by propensity score matching on patient-reported outcomes" published on the Diagnostics journal.</p>
Data from: Differential gene expression and mitonuclear incompatibilities in fast- and slow-developing inter-population Tigriopus californicus hybrids
<p>Mitochondrial functions are intimately reliant on proteins and RNAs encoded in both the nuclear and mitochondrial genomes, leading to inter-genomic coevolution within taxa. Hybridization can break apart coevolved mitonuclear genotypes, resulting in decreased mitochondrial performance and reduced fitness. This hybrid breakdown is an important component of outbreeding depression and early-stage reproductive isolation. However, the mechanisms contributing to mitonuclear interactions remain poorly resolved. Here we scored variation in developmental rate (a proxy for fitness) among reciprocal F2 inter-population hybrids of the intertidal copepod <em>Tigriopus californicus</em>, and used RNA sequencing to assess differences in gene expression between fast- and slow-developing hybrids. In total, differences in expression associated with developmental rate were detected for 2,925 genes, whereas only 135 genes were differentially expressed as a result of differences in mitochondrial genotype. Up-regulated expression in fast developers was enriched for genes involved in chitin-based cuticle development, oxidation-reduction processes, hydrogen peroxide catabolic processes, and mitochondrial respiratory chain complex I. In contrast, up-regulation in slow developers was enriched for DNA replication, cell division, DNA damage, and DNA repair. Eighty-four nuclear-encoded mitochondrial genes were differentially expressed between fast- and slow-developing copepods, including twelve subunits of the electron transport system (ETS) which all had higher expression in fast developers than in slow developers. Nine of these genes were subunits of ETS complex I. Our results emphasize the major roles that mitonuclear interactions within the ETS, particularly in complex I, play in hybrid breakdown, and resolve strong candidate genes for involvement in mitonuclear interactions.</p>
Data from "The evolution of fast-growing coral reef fishes"
<p>Datasets and scripts generated during and/or analysed in the paper '<strong>The evolution of fast-growing coral reef fishes</strong>', published in <em>Nature</em>. More details can be found in the README file.</p>
ScienceDex guides
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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.