2 resultados para Elementos de terras raras

em Universitat de Girona, Spain


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La transformación, sin duda, más compleja del proceso de cambio del modelo universitario es la que implica el paso de un modelo centrado en la enseñanza a otro organizado en torno al aprendizaje. Formar estudiantes autónomos, capaces de dirigir y protagonizar su propio proceso de aprendizaje implica, además de un cambio metodológico, la transformación de roles y de mentalidades así como de estructuras organizativas y materiales. La comunicación presenta algunas de las cuestiones claves del proceso de cambio del modelo formativo que han surgido de la experiencia de utilización del modelo ABP en el primer curso del grado de Geografía y Ordenación del Territorio en la Universidad del País Vasco

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The area known as 'prats de Sant Sebastià' is in Caldes de Malavella. It is part of the wetlands located in the south-eastern end of the Selva Basin. Several areas with unusually high conductivity (EC up to 24,500 uS/cm) have been identified in this place. This fact allows highly specialised and comparatively rare botanical species to grow in this area. These saline soils follow a north-south line-up. The geophysical data, obtained with a field conductivemeter (EM 31), show that this superficial line-up continues in the subsoil. In addition to this, the conductivity cartography, made for an electromagnetic exploration depth of 6 meters, shows that the width of the region where these salinity anomalies take place increases in depth. When included in the hidrogeological context of this sector of the Selva Basin, these data bring new elements for the study of the genesis and working of these marshy environments. The model that future research will have to confirm, maintains that the groundwater discharges coming from the underlying hydrogeothermal aquifer are a conditioning factor of the aforementioned phenomenon. This ascending flow of highly mineralised waters (TDS of about 3,500 mg/l) can produce and keep stable the soil salinity