Algebraic characterization of quasi-isometric spaces via the Higson compactification

AbstractThe purpose of this article is to characterize the quasi-isometry type of a proper metric space via the Banach algebra of Higson functions on it

Determinants and Tools to Evaluate the Ecological Sustainability of Using Forest Biomass as an Alternative Energy Source

Forest biomass, the most ancient of fuels, is again in the center of renewable energy production. This chapter provides an introductory view of the main factors that condition the ecological sustainability of this energy source. The basic concepts of ecological sustainability, ecological rotation, and ecological thresholds (among others) are presented. The state of the art on approaches to assess the sustainability of forest biomass production for heat and electricity is discussed, and tools available for decision-makers to evaluate the sustainability of forest biomass production and management are described. This chapter then describes the main advantages and drawbacks of forest certification, growth and yield tables, and ecological models in relationship to their use in sustainable forest management for biomass and energy production

Luxación congénita irreductible de rodilla: Caso clínico

La luxación congénita de rodilla es una patología muy poco habitual, estimándose una incidencia de 0.017 por mil nacidos vivos, o aproximadamente un 1 por ciente de la incidencia de la displasia de desarrollo de la cadera (DDC). Debido a su baja incidencia existe controversia respecto al tratamiento definitivo. Presentamos el caso de una luxación congénita de rodilla tratada satisfactoriamente mediante tratamiento ortopédico.The congenital dislocation of the knee is a rare infrequent pathology, to be precise the incidence is around 0.017 per thousand live births, or approximately 1% over the incidence of congenital hip dysplasia. Due to such a low incidence, there exist controversial approaches the absolute treatment. This paper presents the particular case of a congenital dislocation of the knee, which has been successfully treated by means of orthopaedic treatment