719 research outputs found

    Optimal diffusion in ecological dynamics with Allee effect in a metapopulation

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    How diffusion impacts on ecological dynamics under the Allee effect and spatial constraints? That is the question we address. Employing a microscopic minimal model in a metapopulation (without imposing nonlinear birth and death rates) we evince --- both numerically and analitically --- the emergence of an optimal diffusion that maximises the survival probability. Even though, at first such result seems counter-intuitive, it has empirical support from recent experiments with engineered bacteria. Moreover, we show that this optimal diffusion disappears for loose spatial constraints.Comment: 16 pages; 6 figure

    Comparación de la medición del espesor de la capa de fibras nerviosas de la retina con dos protocolos del SD-OCT Heidelberg

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    [Extracto] Justificación y objetivos - La medición del espesor de la capa de fibras nerviosas (CFN) del antiguo protocolo consiste en un escaneado circular de diámetro fijo que se coloca sobre el nervio óptico para medir las fibras nerviosas peripapilares. [...]info:eu-repo/semantics/publishedVersio

    Performance clínica de la autorrefraction Visionix L67

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