4,053 research outputs found

    Discrete orbits, recurrence and solvable subgroups of Diff(C^2,0)

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    We discuss the local dynamics of a subgroup of Diff(C^2,0) possessing locally discrete orbits as well as the structure of the recurrent set for more general groups. It is proved, in particular, that a subgroup of Diff(C^2,0) possessing locally discrete orbits must be virtually solvable. These results are of considerable interest in problems concerning integrable systems.Comment: The first version of this paper and "A note on integrability and finite orbits for subgroups of Diff(C^n,0)" are an expanded version of our paper "Discrete orbits and special subgroups of Diff(C^n,0)". An intermediate version re-submitted to the journal on March 2015 is available at http://www.fep.up.pt/docentes/hreis/publications.htm where there is also a comparison between these 3 version

    Burnout among occupactional therapists in Portugal

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    PREVALÊNCIA DAS DISFUNÇÕES DOS MÚSCULOS DO ASSOALHO PÉLVICO EM MULHERES QUE BUSCAM A REALIZAÇÃO DO EXAME PREVENTIVO DE CÂNCER DE COLO DE ÚTERO NAS UNIDADES BÁSICAS DE SAÚDE DO MUNICÍPIO DE ARARANGUÁ

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    TCC(graduação) - Universidade Federal de Santa Catarina. Araranguá. Fisioterapia.Assoalho pélvico, Constipação intestinal, Incontinência urinária, Dispareunia

    Colonization History and Origin of the Galapagos Flycatcher (\u3ci\u3eMyiarchus magnirostris\u3c/i\u3e) and its parasites

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    The Galápagos flycatcher (Myiarchus magnirostris) is an endemic species to the Galápagos Islands, Ecuador, and is among the least studied Galápagos terrestrial birds. In this work I unveiled the origin and colonization history of the Galápagos flycatcher, and also the origin of the parasites that are currently found in/on this bird species. To determine the origin of the Galápagos flycatcher, I rebuilt the phylogeny of the Myiarchus genus using cytb and ND2, and applied a Bayesian approach to estimate its colonization time. I discovered that the closest living relative of the Galápagos flycatcher is Myiarchus tyrannulus (Brown-crested flycatcher) from Central and North America, and these two sister groups diverged approximately 850,000 years ago. To better understand the Galápagos flycatcher evolution in the Galápagos Archipelago, I used seven microsatellites and morphological characters to compare populations from seven islands. Correlation between genetic diversity and island size pointed to drift as an important diversification force. In general, morphological distances across islands were not correlated with pairwise genetic distances, and local adaptation through natural selection may possibly have contributed to that, but drift and phenotypic plasticity could not be excluded as explanations. To investigate the origin of the Galápagos flycatcher parasites I studied blood parasites, lice, and mites from Galápagos flycatchers (n = 254) and from M. tyrannulus (n = 74) in Costa Rica. We found that different parasite species from the Galápagos flycatchers have different origins: five parasite species colonized the Galápagos Islands with the Galápagos flycatchers’ ancestors (two louse species and three mite species), and two parasite species were acquired from the native bird community after the Galápagos flycatchers ancestors arrived to Galápagos (Haemoproteus blood parasite and Brueelia louse). To investigate why some parasites found on M. tyrannulus (Plasmodium blood parasite and Philopterus louse) did not colonize Galápagos, I looked at immune responses of M. tyrannulus from Costa Rica to their parasites. I found no evidence that these parasites are affecting the health of M. tyrannulus more negatively than the other parasites and in a manner that would hinder their ability to colonize Galápagos

    Cannabinoids: Forensic Toxicology and Therapeutics

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