Revisión bibliográfica de los temas tratados en psicología de la salud

Segones Jornades de Foment de la Investigació de la FCHS (Any 1996-1997

Resonance in Asymmetric Warped Geometry

We study the spectrum of an asymmetric warped braneworld model with different AdS curvatures on either side of the brane. In addition to the RS-like modes we find a resonance state. Its mass is proportional to the geometric mean of the two AdS curvature scales, while the difference between them determines the strength of the resonance peak. There is a complementarity between the RS zero-mode and the resonance: making the asymmetry stronger weakens the zero-mode but strengthens the resonance, and vice versa. We calculate numerically the braneworld gravitational potential and discuss the holographic correspondence for the asymmetric model.Comment: 17 pages, 9 figures; v2 references with comments added; v3 two references added, JHEP versio

Rehabilitación de iglesias dañadas en México: dos casos de estudio

En México existe una gran cantidad de iglesias que fueron construidas durante los siglos XVI a XIX. Muchas de ellas han sufrido deterioro con el paso del tiempo, lo que ha dado origen a agrietamientos, corrosión y otros daños en los elementos de la estructura. En otros casos, la actividad sísmica ha causado daños menores que se han acumulado a lo largo del tiempo y que han terminado por afectar la resistencia y rigidez de la estructura. El abatimiento de aguas freáticas ha provocado asentamientos diferenciales en algunas iglesias, con el consecuente daño provocado en los materiales con los que están construidas. En este trabajo se presentan dos casos de rehabilitación de iglesias que han sufrido daños por las causas mencionadas anteriormente. La primera, es una construcción del siglo XVI, ubicada en el estado de Chiapas. Los daños existentes se atribuyen a la falta de mantenimiento y a los pequeños agrietamientos sucesivos que se han ido produciendo por eventos sísmicos ocurridos a lo largo del tiempo. Para recuperar la capacidad de carga de la estructura se realizaron diferentes tipos de intervención que incluyen la adición de tensores para restringir el desplazamiento de las columnas existentes y de los apoyos de las bóvedas interiores, así como la reparación de arcos y bóvedas. El segundo caso representa otro problema encontrado con cierta frecuencia en este tipo de construcciones. Se trata de una iglesia más reciente, que tiene diversos agrietamientos en bóvedas, muros y torre, provocados por asentamientos diferenciales. Las causas del asentamiento se atribuyen al abatimiento del nivel de aguas freáticas, a las variaciones abruptas del nivel del terreno firme, a las importantes descargas transmitidas al terreno de cimentación y a la distribución asimétrica de los esfuerzos sobre el terreno

Learning energy storage in hybrid/electric vehicles: Erasmus Mundus Master Course in Sustainable Transportation & Electrical Power Systems

The "Erasmus Mundus Master Course in Sustainable Transportation & Electrical Power Systems" is supported by three universities, located in Spain, Italy and United Kingdom, and a Polytechnic Institute in Portugal. One of the main goals is the training of qualified staff in areas related to electrical energy management, emphasizing in power systems for electric propulsion vehicles and renewable energies. Among others, the subject "Energy Storage and Recovery in Power Systems and Hybrid/Electric Vehicles" is considered a keystone in the Master. During third semester, the students who follow the technical track, have to develop small projects and tasks related to electric vehicles, battery management, power stages for battery charger and so on. This paper show the goals and the results obtained in these topics. All of these topics are partially collected in one subject, with a high practical content. The students have to learn not only the theoretical topics, but they have to elaborate a project, in a work team and use modern laboratory equipment as well. It should be noted that the students have to work and collaborate in a multicultural environment, with students and professors. This paper describes the subject methodology, and the results obtained

Land use and environmental factors affecting red-legged partridge (Alectoris rufa) hunting yields in southern Spain

The red-legged partridge is a small game species widely hunted in southern Spain. Its commercial use has important socioeconomic effects in rural areas where other agrarian uses are of marginal importance. The aims of the present work were to identify areas in Andalusia (southern Spain) where game yields for the red-legged partridge reach high values and to establish the environmental and land use factors that determine them. We analysed 32,134 annual hunting reports (HRs) produced by 6,049 game estates during the hunting seasons 1993/1994 to 2001/2002 to estimate the average hunting yields of red-legged partridge in each Andalusian municipality (n=771). We modelled the favourability for obtaining good hunting yields using stepwise logistic regression on a set of climatic, topographical, land use and vegetation variables that were available as digital coverages or tabular data applied to municipalities. Good hunting yields occur mainly in plain areas located in the Guadalquivir valley, at the bottom of Betic Range and in the Betic depressions. Favourable areas are related to highly mechanised, lowelevation areas mainly dedicated to intensive dry crops. The most favourable areas predicted by our model are mainly located in the Guadalquivir valley

Implementación de un sistema de escenarios futuros sobre el mapa de usos de suelo de Andalucía.

La Consejería de Medio Ambiente (CMA) ha puesto en marcha un estudio para la generación de cartografía prospectiva de usos de suelo en la Andalucía del siglo XXI. El objeto de este proyecto es explorar y analizar la posible evolución a medio-largo plazo de los usos del suelo y sus implicaciones ambientales, en un contexto de cambio global según diferentes escenarios. Los estudios prospectivos tales como, la construcción de escenarios, permiten iluminar la toma de decisiones. La distribución de los usos de suelo influye en el crecimiento y desarrollo de nuestra sociedad y representa un elemento importante para predecir los impactos ambientales. Actualmente la CMA dispone de una cartografía con los más elevados niveles de detalle y precisión espacial, que cumple los estándares cartográficos internacionales, y que cubre los últimos 50 años en la evolución de los usos del suelo en nuestra región. El poder anticipar, bajo diferentes supuestos de desarrollo socioeconómico, la evolución y la distribución de los usos del suelo en el futuro, supondría avanzar y complementar esta línea de trabajo. La integración de estos factores se ha llevado a cabo mediante autómatas celulares utilizados para modelar los cambios de uso y el desarrollo urbano.The Environmental Ministry of the Andalusian Regional Government has initiated a study to generate prospective mapping of land uses in Andalusia in the XXI century. The goal of this project is to explore and analyze medium to long- term land uses changes and their environmental implications according to different scenarios in the context of global change. Predicting land use change under such scenarios will provide valuable information to decision makers. The distribution of the land uses influences in the growth and development of our society and thus represents a crucial element to predict future environmental impacts. The Environmental Ministry of Andalusia currently has maps available that depict land use changes in the region over the past 50 years and contain the highest level of detail and spatial precision according to international cartographic standards. The power to predict the growth and distribution of future land uses under different assumptions of socioeconomic development will advance and complement this work. The integration of these factors is carried out based on cellular automata applied to model land use changes and urban development

Distribution modelling of wild rabbit hunting yields in its original area (S Iberian Peninsula)

In this work we used the information of the Annual Hunting Reports (AHRs) to obtain a high-resolution model of the potential favourableness for wild rabbit harvesting in Andalusia (southern Spain), using environmental and land-use variables as predictors. We analysed 32,134 AHRs from the period 1993/2001 reported by 6049 game estates to estimate the average hunting yields of wild rabbit in each Andalusian municipality (n5771). We modelled the favourableness for obtaining good hunting yields using stepwise logistic regression on a set of climatic, orographical, land use, and vegetation variables. The favourability equation was used to create a downscaled image representing the favourableness of obtaining good hunting yields for the wild rabbit in 161 km squares in Andalusia, using the Idrisi Image Calculator. The variables that affected hunting yields of wild rabbit were altitude, dry wood crops (mainly olive groves, almond groves, and vineyards), temperature, pasture, slope, and annual number of frost days. The 161 km squares with high favourableness values are scattered throughout the territory, which seems to be caused mainly by the effect of vegetation. Finally, we obtained quality categories for the territory by combining the probability values given by logistic regression with those of the environmental favourability function

Enhanced current-limiting droop controller for grid-connected inverters to guarantee stability and maximize power injection under grid faults

Droop controlled inverters are widely used to integrate distributed energy resources (DERs) to the smart grid and provide ancillary services (frequency and voltage support). However, during grid variations or faults, the droop control scheme should inherit a current-limiting property to protect both the inverter and the DER unit. In this brief, a novel structure of the recently developed current-limiting droop (CLD) controller is proposed to accomplish two main tasks: i) guarantee current limitation with maximum power injection during grid faults and ii) rigorously guarantee asymptotic stability of any equilibrium point in a given bounded operating range of the closed-loop system for a grid-connected inverter. Since the maximum power of the DER unit can be utilized under grid faults with the proposed enhanced CLD, then inspired by the latest fault-ride-through requirements, it is further extended to provide voltage support to a faulty grid via the maximum injection of reactive power. This is achieved by simply adjusting the reactive power reference opposed to existing control schemes which require adjustment of both the real and the reactive power. Hence, a unified current-limiting control scheme for grid-connected inverters under both normal and faulty grids with a simplified voltage support mechanism is developed and experimentally verified in this brief

Identificación y caracterización del paisaje mediante parámetros visuales del relieve. REDIAM

El presente trabajo tiene como fin crear una metodología que permita construir un modelo objetivo, replicable, homogéneo y sistemático, que permita analizar y caracterizar un relieve desde el punto de vista visual, y cuyo resultado constituya un instrumento para la toma de decisiones, basadas en criterios paisajísticos, en la planificación y gestión de recursos naturales.This paper intends to create a methodology for building an objective, replicable, consistent and systematic model for analyzing and characterizing a relief from the visual point of view in order to provide a tool for landscape-based decision making on natural resources planning and management