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181 results for “Stability studies”
Data from: Stability and generalization in seed dispersal networks: a case study of frugivorous fish in Neotropical wetlands
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Data from: Green derivative synchronous spectrofluorimetry for kinetic stability study of florfenicol
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Data from: Phylogenetic stability, tree shape, and character compatibility: a case study using early tetrapods
Phylogenetic tree shape varies as the evolutionary processes affecting a clade change over time. In this study, we examined an empirical phylogeny of fossil tetrapods during several time intervals, and studied how temporal constraints manifested in patterns of tree imbalance and character change. The results indicate that the impact of temporal constraints on tree shape is minimal and highlights the stability through time of the reference tetrapod phylogeny. Unexpected values of imbalance for Mississippian and Pennsylvanian time slices strongly support the hypothesis that the Carboniferous was a period of explosive tetrapod radiation. Several significant diversification shifts take place in the Mississippian and underpin increased terrestrialization among the earliest limbed vertebrates. Character incompatibility is relatively high at the beginning of tetrapod history, but quickly decreases to a relatively stable lower level, relative to a null distribution based on constant rates of character change. This implies that basal tetrapods had high, but declining, rates of homoplasy early in their evolutionary history, although the origin of Lissamphibia is an exception to this trend. The time slice approach is a powerful method of phylogenetic analysis and a useful tool for assessing the impact of combining extinct and extant taxa in phylogenetic analyses of large and speciose clades.
Data from: Species richness, but not phylogenetic diversity, influences community biomass production and temporal stability in a re-examination of 16 grassland biodiversity studies
1.Hundreds of experiments have now manipulated species richness of various groups of organisms and examined how this aspect of biological diversity influences ecosystem functioning. Ecologists have recently expanded this field to look at whether phylogenetic diversity among species, often quantified as the sum of branch lengths on a molecular phylogeny leading to all species in a community, also predicts ecological function. Some have hypothesized that phylogenetic divergence should be a superior predictor of ecological function than species richness because evolutionary relatedness represents the degree of ecological and functional differentiation among species. But studies to date have provided mixed support for this hypothesis. 2.Here, we re-analyze data from 16 experiments that have manipulated plant species richness in grassland ecosystems and examined the impact on aboveground biomass production over multiple time points. Using a new molecular phylogeny of the plant species used in these experiments, we quantified how the phylogenetic diversity of plants impacts average community biomass production as well as the stability of community biomass production through time. 3.Using four complementary analyses we show that, after statistically controlling for variation in species richness, phylogenetic diversity (the sum of branches in a molecular phylogenetic tree connecting all species in a community) is neither related to mean community biomass nor to the temporal stability of biomass. These results run counter to past claims. However, after controlling for species richness, phylogenetic diversity was positively related to variation in community biomass over time due to an increase in the variances of individual species, but this relationship was not strong enough to influence community stability. 4.In contrast to the non-significant relationships between phylogenetic diversity, biomass, and stability, our analyses show that species richness per se tends to increase the mean biomass production of plant communities, after controlling for phylogenetic diversity. The relationship between species richness and temporal variation in community biomass was either positive, non-significant or negative depending on which analysis was used. However, the increases in community biomass with species richness, independently of phylogenetic diversity, always led to increased stability. These results suggest that phylogenetic diversity is no better as a predictor of ecosystem functioning than species richness. 5.Synthesis. Our study on grasslands offers a cautionary tale when trying to relate phylogenetic diversity to ecosystem functioning suggesting that there may be ecologically important trait and functional variation among species that is not explained by phylogenetic relatedness. Our results fail to support the hypothesis that the conservation of evolutionarily distinct species would be more effective than the conservation of species richness as a way to maintain productive and stable communities under changing environmental conditions.
Knee Proprioception, Muscle Strength, and Stability in Type 2 Diabetes Mellitus: Unveiling the Moderating Effects of Physical Activity – A cross-sectional study.
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A Multicenter, Investigative Study of the Safety and Efficacy of Extended Administration of Aripiprazole in Combination With Mood Stabilizer for the Treatment of Patients With Bipolar Disorder Experie
ClinicalTrials.gov study NCT00606320. IPD Sharing: Not stated. Countries: 4. Publications: 0.
The Multicenter Atorvastatin Plaque Stabilization (MAPS) Study
ClinicalTrials.gov study NCT01053065. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Toric Eye Strain and Stability Study
ClinicalTrials.gov study NCT01857102. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Study of the Effectiveness and Safety of Risperidone as add-on Therapy to Mood Stabilizers in the Treatment of Manic Episodes Associated With Bipolar Disorder
ClinicalTrials.gov study NCT00253149. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Study to Assess Efficacy and Safety of Aclidinium Bromide and Aclidinium Bromide/Formoterol Fumarate in Stabile COPD Patients
ClinicalTrials.gov study NCT03022097. IPD Sharing: YES. Countries: 5. Publications: 0.
A UK Interventional Trial in Premature Infants With Apnea of Prematurity Using a Simple, Non-invasive Vibratory Device to Study the Effectiveness in Supporting Breathing and General Stability
ClinicalTrials.gov study NCT04528030. IPD Sharing: YES. Countries: 0. Publications: 17.
Comparative Study Evaluating Stability of Fracture Segments After Treatment of Mandibular Angle Fracture With 3d Strut Plate With or Without IMMF.
ClinicalTrials.gov study NCT03640039. IPD Sharing: NO. Countries: 0. Publications: 8.
MRI Study of Self-Perception of Postural Stability
ClinicalTrials.gov study NCT00060593. IPD Sharing: Not stated. Countries: 1. Publications: 3.
A Postmarket Surveillance Study of the Paradigm Spine Dynamic Stabilization System (DSS)
ClinicalTrials.gov study NCT01461005. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Multicenter Investigative Study of the Safety and Efficacy of Long-term Administration of Aripiprazole in Combination With Mood Stabilizer for the Treatment of Patients With Bipolar Disorder Experie
ClinicalTrials.gov study NCT00606229. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Study of the Effectiveness and Safety of Risperidone Versus Placebo as add-on Therapy to Mood Stabilizers, in the Treatment of Manic Episodes Associated With Bipolar Disorder.
ClinicalTrials.gov study NCT00250367. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Triathlon Total Stabilizer (TS) Outcomes Study
ClinicalTrials.gov study NCT00958789. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Attain Stability™ Quad Clinical Study
ClinicalTrials.gov study NCT03099655. IPD Sharing: NO. Countries: 10. Publications: 0.
Study in Stabilized Schizophrenic Patients to Evaluate the Pharmacokinetics of Risperidone and 9-Hydroxy (OH)-Risperidone When Risperidone is Administered From a Polyurethane Implant
ClinicalTrials.gov study NCT02658357. IPD Sharing: NO. Countries: 1. Publications: 0.
Impact of the Type of Stabilization in the Two-stage Knee Reimplantation on Reinfection - Prospective, Randomized Study.
ClinicalTrials.gov study NCT04446676. IPD Sharing: YES. Countries: 1. Publications: 0.
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.