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513 results for “prone”
Natural variation further increases resilience of sorghum bred for chronically drought-prone environments
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Geometric model for toppling-prone deformation of layered reverse-dip slope
This paper concentrates on analyzing toppling response of layered reverse-dip slope under the action of geometric feature factors of slope angle, strata thickness and strata dip, so as to establish toppling-prone geometric model for toppling deformation. To achieve this, a total of 144 kinds of combination schemes performed by numerical simulation are carried out on three secondary factors of slope angle and strata dip and thickness. The toppling response of reverse dip slope under the effect of geometric feature factors is obtained using numerical simulation software UDEC. Then a model for toppling prediction is designed by utilizing support vector machine, and followed by a geometric model for possible toppling of reverse-dip slope. The research shows that the geometric model is a quarter of a spheroid with a slope angle of 80°, a strata dip of 80°, and a strata thickness of 0.19 m as the center. The length of the long equatorial radius of the spheroid is 31° (strata dip axial), that of the short equatorial radius is 21° (slope angle axial), and the polar radius is 0.075 m (strata thickness axial), and the ratio of long equatorial radius, short equatorial radius and polar radius is 2.48:1.68:1.00.
Data from: Persistence of an extinction-prone predator-prey interaction through metapopulation dynamics
In theory, predator-prey pairs with extinction-prone local populations can persist through metapopulation dynamics, wherein local populations fluctuate asynchronously, occasionally providing dispersers that prevent permanent extinction in all patches. A few studies have shown that spatial structure can extend predator-prey persistence. However, no studies have unequivocally demonstrated the asynchrony among patches, low dispersal rates, and rescue effects that prove metapopulation dynamics extend persistence. We used a protist predator-prey pair to show that spatial subdivision lengthens persistence through metapopulation dynamics. The pair comprised the predaceous ciliate, Didinium nasutum, feeding on the bacterivorous ciliate, Colpidium cf. striatum. A replicated experiment assessed how habitat subdivision affects persistence. Undivided habitats were of four volumes: 30, 180, 270, and 750 mt. Subdivided microcosms, or ''arrays,'' were groups of nine or 25 linked 30-mL bottles (270 or 750 mt total volume). In arrays, predators and prey persisted for 130 d (602 prey and 437 predator generations), at which point the experiment ended. Predators went extinct in undivided microcosms of equivalent volumes within a mean of only 70 d. Predators persisted for a mean of just 19 d in isolated 30-mL bottles (equivalent to isolated patches of arrays). In a separate experiment, prey were driven extinct in four of 15 isolated 30-mL bottles, and persistence times of predators were broadly similar. We documented the following hallmarks of metapopulation dynamics: (1) asynchronous fluctuations in different subpopulations; (2) frequent local prey extinctions and recolonizations; (3) persistence of protists in arrays, despite extinction of isolated local populations; and (4) rescue effects in predator populations. Other experiments measured dispersal rates and the effects on local dynamics of immigrant predators and prey, and initial predator : prey ratios. Only a small fraction of protists dispersed within a generation, consistent with metapopulation dynamics. Immigration of predators increased the frequency of local extinctions of prey, and immigration of prey increased the persistence of both predators and prey. Higher initial predator:prey ratios decreased the persistence of prey in undivided volumes. Although the pair persisted regionally in arrays, data indicated that local extinctions of prey were common. In array patches, predator:prey ratios were higher and predator-prey cycles were shorter than in undivided volumes. Dispersal made local dynamics more prone to extinction, yet promoted regional persistence because the risk of extinction of distant subpopulations became independent.
Data from: Predicting evolution in response to climate change: the example of sprouting probability in three dormancy-prone orchid species
Although many ecological properties of species respond to climate change, their evolutionary responses are poorly understood. Here, we use data from long-term demographic studies to predict evolutionary responses of three herbaceous perennial orchid species, Cypripedium parviflorum, C. candidum and Ophrys sphegodes, to predicted climate changes in the habitats they occupy. We focus on the evolution of sprouting probability, because all three species exhibit long-term vegetative dormancy, i.e. individual plants may not emerge above-ground, potentially for several consecutive years. The drivers of all major vital rates for populations of the species were analysed with general linear mixed models (GLMMs). High-dimensionality function-based matrix projection models were then developed to serve as core elements of deterministic and stochastic adaptive dynamics models used to analyse the adaptive context of sprouting in all populations. We then used regional climate forecasts, derived from high-resolution general atmospheric circulation models, of increased mean annual temperatures and spring precipitation at the occupied sites, to predict evolutionary trends in sprouting. The models predicted that C. parviflorum and O. sphegodes will evolve higher and lower probabilities of sprouting, respectively, by the end of the twenty-first century, whereas, after considerable variation, the probability of sprouting in C. candidum will return to its current level. These trends appear to be driven by relationships between mortality and size: in C. parviflorum and C. candidum, mortality is negatively related to size in the current year but positively related to growth since the previous year, whereas in O. sphegodes, mortality is positively related to size.
Data from: Intrachromosomal rearrangements in avian genome evolution: evidence for regions prone to breakpoints
It is generally believed that the organization of avian genomes remains highly conserved in evolution as chromosome number is constant and comparative chromosome painting demonstrated there to be very few interchromosomal rearrangements. The recent sequencing of the zebra finch (Taeniopygia guttata) genome allowed an assessment of the number of intra-chromosomal rearrangements between it and the chicken (Gallus gallus) genome, revealing a surprisingly high number of intra-chromosomal rearrangements. With the publication of the turkey (Meleagris gallopavo) genome it has become possible to describe intrachromosomal rearrangements between these three important avian species, gain insight into the direction of evolutionary change and assess whether breakpoint regions are reused in birds. To this end, we aligned entire chromosomes between chicken, turkey and zebra finch, identifying syntenic blocks of at least 250kb. Potential optimal pathways of rearrangements between each of the three genomes were determined, as was a potential Galliform ancestral organization. From this, our data suggest that around one third of chromosomal breakpoint regions may recur during avian evolution, with 10% of breakpoints apparently recurring in different lineages. This agrees with our previous hypothesis that mechanisms of genome evolution are driven by hotspots of non-allelic homologous recombination.
Fluoxetine as a Quit Smoking AID for Depression Prone
ClinicalTrials.gov study NCT00113737. IPD Sharing: Not stated. Countries: 0. Publications: 10.
Early Prone Positioning and Clinical Outcomes in Non-Intubated Acute Respiratory Distress Syndrome (ARDS) Patients
ClinicalTrials.gov study NCT07133022. IPD Sharing: NO. Countries: 1. Publications: 0.
Prone Partial Breast Irradiation (PBI): a Prospective Randomized Trial
ClinicalTrials.gov study NCT02276885. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Changes in Optic Nerve Sheath Diameter in Patients Undergoing Spinal Surgery in the Prone Position
ClinicalTrials.gov study NCT04301817. IPD Sharing: Not stated. Countries: 0. Publications: 2.
Hemodynamic Changes Due to Prone Position
ClinicalTrials.gov study NCT04491331. IPD Sharing: NO. Countries: 1. Publications: 0.
The Effects of Different Prone Positioning Angles on Cardiopulmonary Function in Children After Congenital Heart Disease Surgery: A Randomized Controlled Trial
ClinicalTrials.gov study NCT07323979. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Study of Prone Accelerated Breast And Nodal IMRT
ClinicalTrials.gov study NCT02308488. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Wake Prone Positioning in Non-intubated Patients With Acute Hypoxemic Respiratory Failure
ClinicalTrials.gov study NCT05698004. IPD Sharing: Not stated. Countries: 0. Publications: 3.
Prone Versus Supine Positioning and the Impact on Bronchopulmonary Dysplasia in Very Low Birth Weight Infants.
ClinicalTrials.gov study NCT04890158. IPD Sharing: NO. Countries: 1. Publications: 0.
Prone Breath Hold Technique to Decrease Cardiac and Pulmonary Doses in Women Receiving Left Breast Radiotherapy
ClinicalTrials.gov study NCT02379988. IPD Sharing: Not stated. Countries: 1. Publications: 0.
The Effect of e-Registration and mHealth on Institutional Deliveries in the Hazard-prone Areas
ClinicalTrials.gov study NCT05398978. IPD Sharing: NO. Countries: 0. Publications: 1.
Measurement of Intraocular Pressure in Patients Undergoing Laminectomy in the Prone Position
ClinicalTrials.gov study NCT07067008. IPD Sharing: UNDECIDED. Countries: 0. Publications: 2.
A Study to Evaluate the Impact of Clascoterone 1% Cream on Skin Barrier Properties in Acne Prone Patients
ClinicalTrials.gov study NCT06415292. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Prone Duration in COVID-19 ARDS
ClinicalTrials.gov study NCT06765759. IPD Sharing: NO. Countries: 1. Publications: 0.
Validation of Prone Crawl Radiotherapy for Whole-breast Irradiation After Breast Conserving Surgery
ClinicalTrials.gov study NCT05179161. IPD Sharing: NO. Countries: 0. Publications: 2.
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.