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

Thermoelectrical regulation of microinjection moulds

Microinjection is one of the major replication techniques for producing low cost micro parts. The small scale of the microinjection processes presents different challenges from those usually encountered in conventional injection moulding. One particular aspect, very important for part quality, is mould temperature control. In conventional injection moulding, the temperature control system is set to a fixed value during the injection cycle. In microinjection moulding such behaviour is not acceptable, which as lead to the development of “active” control temperature of the mould named “variotherm” systems. In the present paper a study will be presented for the implementation of thermo electric elements in dynamic temperature control of microinjection moulds and its impact on the process cycle time and part quality