719 research outputs found
Optimal diffusion in ecological dynamics with Allee effect in a metapopulation
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
[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
info:eu-repo/semantics/publishedVersio
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