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168 results for “Complex systems”
Ultimaster Nagomi™ Sirolimus Eluting Coronary Stent System in Complex PCI Patients
ClinicalTrials.gov study NCT05705973. IPD Sharing: Not stated. Countries: 13. Publications: 0.
Data from: Genes of the major histocompatibility complex highlight interactions of the innate and adaptive immune system
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Breeding system of diploid sexuals within the Ranunculus auricomus complex and its role in a geographical parthenogenesis scenario
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Data from: Strict monandry in the ponerine army ant genus Simopelta suggests that colony size and complexity drive mating system evolution in social insects
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Intraspecific mating system evolution and its effect on complex male secondary sexual traits: does male-male competition increase selection on size or shape?
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Data from: Ants determine their next move at rest: motor planning and causality in complex systems
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Data from: Regime shifts in marine communities: a complex systems perspective on food web dynamics
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Data from: The evolution of complexity in the visual systems of stomatopods: insights from transcriptomics
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A practical method for estimating coupling functions in complex dynamical systems
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Unprecedented biting performance in herbivorous fish: how the complex biting system of Pomacentridae circumvents performance trade-offs
<p>It is well accepted that the complexity of functional systems may mitigate performance trade-offs. However, data supporting this theory is hard to find because it needs to be based on a functional system with different complexity levels in closely-related species. The Pomacentridae (damselfishes) provide an excellent opportunity to test the hypothesis because most of the species have two mouth-closing systems: the first using the <i>adductor mandibulae</i>, as in all teleost fishes, and a second one relying on the cerato-mandibular ligament (cmd), a synapomorphic trait of the family. Interestingly, some pomacentrids have secondarily lost the cmd ligament during evolution and therefore have a less complex mouth-closing system. Using dissection, kinematic analysis, and mathematical modeling, we demonstrated that the possession of two mouth-closing systems enabled grazing damselfishes to have a forceful and extremely fast bite. This combination challenges a major functional trade-off in fish jaw dynamics, as systems better suited for force transmission are usually less suited for speed transmission, and vice versa. The combination of grazing behavior, small and robust lower jaws (conferring high biting force), and an ultra-fast bite is unusual within actinopterygians. These attributes and their associated performance seem to be required conditions to colonize the ecological niche of farming, i.e., the maintenance of small filamentous algae crops serving as both food and storage.</p>
Data from: Dental ontogeny in extinct synapsids reveals a complex evolutionary history of the mammalian tooth attachment system
The mammalian dentition is uniquely characterized by a combination of precise occlusion, permanent adult teeth, and a unique tooth attachment system. Unlike the ankylosed teeth in most reptiles, mammal teeth are supported by a ligamentous tissue that suspends each tooth in its socket, providing flexible and compliant tooth attachment that prolongs the life of each tooth and maintains occlusal relationships. Here we investigate dental ontogeny through histological examination of a wide range of extinct synapsid lineages to assess whether the ligamentous tooth attachment system is unique to mammals and to determine how it evolved. This study shows for the first time that the ligamentous tooth attachment system is not unique to crown mammals within Synapsida, having arisen in several non-mammalian therapsid clades as a result of neoteny and progenesis in dental ontogeny. Mammalian tooth attachment is here re-interpreted as a paedomorphic condition relative to the ancestral synapsid form of tooth attachment.
Supplementary material 1 from: Topping CJ, Duan X (2024) Managing large and complex population operations with agent-based models: The ALMaSS Population_Manager. Food and Ecological Systems Modelling Journal 5: e117593. https://doi.org/10.3897/fmj.5.117593
The code documentation for the ALMaSS Population_Manager class
Figure 2 from: Topping CJ, Duan X (2024) Managing large and complex population operations with agent-based models: The ALMaSS Population_Manager. Food and Ecological Systems Modelling Journal 5: e117593. https://doi.org/10.3897/fmj.5.117593
Figure 2 The time step processes. The three parts of the time step (BeginStep, Step, EndStep) process can run in multithreaded mode for each object 1 to n, extant at that time and are separated by customisable methods for reporting or list management by the Population_Manager class.
Figure 1 from: Topping CJ, Duan X (2024) Managing large and complex population operations with agent-based models: The ALMaSS Population_Manager. Food and Ecological Systems Modelling Journal 5: e117593. https://doi.org/10.3897/fmj.5.117593
Figure 1 The current class hierarchy for beetle population managers, starting with the parent class Population_Manager_Base.
Figure 3 from: Topping CJ, Duan X (2024) Managing large and complex population operations with agent-based models: The ALMaSS Population_Manager. Food and Ecological Systems Modelling Journal 5: e117593. https://doi.org/10.3897/fmj.5.117593
Figure 3 Change in the maximum and minimum sizes and population numbers for two scenarios using the Theoretical1 species, N = do nothing, Rand = randomise the execution order.
Figure 4 from: Moreno-González JA, Pinto-da-Rocha R, Gallão JE (2021) Bringing order to a complex system: phenotypic and genotypic evidence contribute to the taxonomy of Tityus (Scorpiones, Buthidae) and support the description of a new species. ZooKeys 1075: 33-75. https://doi.org/10.3897/zookeys.1075.67459
Figure 4 Tityus C. L. Koch, 1836, telotarsi IV, showing ventral macrosetae A, C, E, G, I, K white light B, D, F, H, J, L UV light A, BTityus (Tityus) brazilae Lourenço & Eickstedt, 1984 (type II) (MZSP 75619) C, DTityus (Archaeotityus) clathratus C. L. Koch, 1844 (type I) (MZSP 31468) E, FTityus (Atreus) forcipula (Gervais, 1843) (type II) (MZSP) G, HTityus (Atreus) obscurus Gervais, 1843 (type I) (MNRJ 07610) I, JTityus (Tityus) serrulatus Lutz & Mello, 1922 (type II) (MZSP 28205) K, LTityus (Tityus) spelaeus sp. nov. (MZSP 74633) (type II). Observations = telotarsi I–IV ventral setae distribution: Type I = tuft of irregularly distributed setae. Type II = two discrete ventrosubmedian rows of setae. Scale bars: 500 μm.
Figure 14 from: Moreno-González JA, Pinto-da-Rocha R, Gallão JE (2021) Bringing order to a complex system: phenotypic and genotypic evidence contribute to the taxonomy of Tityus (Scorpiones, Buthidae) and support the description of a new species. ZooKeys 1075: 33-75. https://doi.org/10.3897/zookeys.1075.67459
Figure 14 Habitat of Tityus (Tityus) spelaeus sp. nov. in the Russão cave A inside landscape of the cave B females on the cave walls.
Figure 11 from: Moreno-González JA, Pinto-da-Rocha R, Gallão JE (2021) Bringing order to a complex system: phenotypic and genotypic evidence contribute to the taxonomy of Tityus (Scorpiones, Buthidae) and support the description of a new species. ZooKeys 1075: 33-75. https://doi.org/10.3897/zookeys.1075.67459
Figure 11 Tityus (Tityus) spelaeus sp. nov., female paratype (MZSP 74633) genital area and pectines A genital operculum and pectinal basal piece B closeup of the pectinal basal piece, showing cuticular pores on glandular region C right pectine D peg sensillae, distribution E closeup of a peg sensilla. Scale bars: 800 µm (A); 60 µm (B); 1000 µm (C); 20 µm (D); 3 µm (E).
Figure 10 from: Moreno-González JA, Pinto-da-Rocha R, Gallão JE (2021) Bringing order to a complex system: phenotypic and genotypic evidence contribute to the taxonomy of Tityus (Scorpiones, Buthidae) and support the description of a new species. ZooKeys 1075: 33-75. https://doi.org/10.3897/zookeys.1075.67459
Figure 10 Tityus (Tityus) spelaeus sp. nov., female holotype (MZSP 74633), chela A external view B dorsal view C ventral view. Scale bar: 3 mm.
Figure 8 from: Moreno-González JA, Pinto-da-Rocha R, Gallão JE (2021) Bringing order to a complex system: phenotypic and genotypic evidence contribute to the taxonomy of Tityus (Scorpiones, Buthidae) and support the description of a new species. ZooKeys 1075: 33-75. https://doi.org/10.3897/zookeys.1075.67459
Figure 8 Tityus (Tityus) spelaeus sp. nov., female holotype (MZSP 74633), carapace, dorsal view A white light B UV light. Scale bars: 2 mm.
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.