El AVE Madrid-Lisboa por Extremadura: efectos territoriales y diferentes alternativas

Se han considerado diferentes trazados del futuro AVE Madrid-Lisboa por Extremadura. A tenor de los diferentes criterios cualitativos escogidos (población servida directa por el AVE, distancias, nº de paradas, coste de las obras, impacto ambiental, intermodalidad y transporte de mercancías) se han tratado de hallar los trazados más adecuados de cara a optimizar los efectos positivos de desarrollo y progreso que una infraestructura de este tipo produciría a nivel territorial en Extremadura. Efectos que, por otra parte, se conocen mejor gracias a la década de experiencia que se ha obtenido en ciudades como Ciudad Real y Puertollano, muy semejantes en la mayoría de los aspectos a las extremeñas (Cáceres, Mérida, Badajoz,...). Algunos de los criterios descritos anteriormente (ser la zona de mayor población de Extremadura, tener trazados por relieves más suaves, tener menor impacto ambiental o mayor intermodalidad), determinan que los trazados que discurren por Mérida y Badajoz crean mayor vertebración de la región y tienen unas consecuencias mucho más favorables que otros, donde el trazado no conecta en altas prestaciones las tres ciudades más importantes de Extremadura: Cáceres, Mérida y Badajoz (denominados en la tesina Centro CMB-1,2 y Sur-S)

Comunicación, ciencia, desarrollo y tercer mundo

En el present treball es pretén identificar i analitzar el paper de diversos factors que les modernes tecnologies de la informació, la comunicació i la documentació han anat introduint com a elements potencials per a desenvolupar-se i autosostenir-se en un dels sectors més desatesos en els països del Tercer Món: la formació tecnicocientífica i la recerca. Es mostra el perfil d'alguns dels actors que intervenen des del Primer Món i es du a terme un procés de convergència de tots aquests actors cap a una autèntica comunitat científica virtual internacional, amb la complicitat del fenomen Internet com a fons conceptual i pragmàtic.This paper tries to identify and analize the role of several factors coming from the modern information, communication and documentation technologies. These factors have been proposed as agents to promote and enhance the development and sustainability processes in one of the most underdeveloped sectors in Third World countries: the scientific revolution. Some of the actors, coming from the Developed World, are subject of shaping and convergence processes towards the formation of a true scientific virtual international community with the omnipresent aid, in the end, of Internet as both conceptual and pragmatic background.En el presente trabajo se intentan identificar y analizar el papel de diversos factores que las modernas tecnologías de la información, la comunicación y la documentación han ido introduciendo como elementos potenciales para el desarrollo y la autosostenibilidad en uno de los sectores más desatendidos en los países del Tercer Mundo: la formación tecnicocientífica y la investigación. Se muestra el perfil de algunos de los actores que intervienen desde el Primer Mundo y se hace un proceso de convergencia de todos ellos hacia una auténtica comunidad científica virtual internacional con la complicidad del fenómeno Internet como fondo conceptual y pragmático

Are you a discriminator? A Lab Experiment : Gift Exchange and the impact of information on the wages of immigrants

Mestrado em EconomiaI report a reversed Multi-Employee gift exchange laboratory experiment considering immigrants and local workers. My main goal is to investigate the existence of statistical discrimination. In the experiment, firms make wage offers using the strategy method, while workers choose an effort level. Higher the effort, higher the cost to workers. There is a partial mechanism available to workers for punishing or rewarding firm’s offers. Con sistent with the gift exchange hypothesis, workers provided more effort at higher wages and performed a task as retribution. Immigrants provide slightly less effort than locals at higher wages, but this is far to be significant. Firms showed a wage-effort positive relation consistent with the Efficiency Wage Hypothesis. Firm’s non-binding effort requests were honoured, resulting in increased overall number of tasks performed by workers. Finally, no evidence of statistical discrimination was found in this studyEste estudo corresponde aos resultados duma experiência de laboratório que usa o jogo de troca de presentes invertido, com dois tipos de trabalhadores, imigrantes e locais. O objetivo principal é investigar a existência de discriminação estatística. Nesta experiência, as empresas fazem ofertas salariais usando o strategy method, enquanto os trabalhadores escolhem um nível de esforço. Quanto maior o esforço, maior o custo associado. Existe um mecanismo parcial disponível aos trabalhadores para punir ou recompensar as ofertas da empresa. Consistente com a hipótese da troca de presentes, os trabalhadores esforçam-se mais com salários mais altos e realizam uma tarefa em retribuição. Os imigrantes oferecem menos esforço do que os locais com salários mais altos, mas isto está longe de ser estatisticamente significativo. Para as empresas existe uma relação positiva esforço-salário consistente com a Hipótese da Eficiência Salarial. Os acordos não vinculativos da empresa-trabalhador foram cumpridos, resultando num aumento do número total de tarefas realizadas pelos trabalhadores. Finalmente, nenhuma evidência de discriminação estatística foi encontrada neste estudo.info:eu-repo/semantics/publishedVersio

Las Bitácoras o weblogs y la lógica del campo informativo : un análisis comparativo con la agenda mediática tradicional

Las bitácoras o weblogs ilustran las nuevas prácticas y modos informativos de Internet. Si bien cubren diversos géneros temáticos, perspectivas y prácticas discursivas el trabajo se centra en las bitácoras de actualidad. La investigación cuestiona que puedan considerarse medios alternativos de información capaces de independizarse de la prensa tradicional y electrónica además de preguntarse en qué medida las bitácoras y la red en general contribuyen a una mayor democratización y pluralidad de los contenidos. Se parte, así, de una comparación entre la agenda temática de las bitácoras y de los medios impresos para establecer cuál es su lugar en la dinámica del campo informativo, en qué medida pueden generar información nueva y cuál es el enfoque que ofrecen.Weblogs symbolize how nowadays people manage information in internet. Although under this concept are included a wide range of topics, views and discursive practices we focus on the journalistic oriented ones. This research wonders if weblogs can be considered as an alternative channel of information independent from traditional press and e-newspapers. It questions in which ways they contribute to a more democratic, plural and free news system. We compare some weblogs agenda with press one in order to find out which role they play in the dynamics of the informative field, in which degree they can generate new information and which approach they show

Output controllability analysis of fixed speed wind turbine

This paper deals with a study of output-controllability of a squirrel cage induction generator connected directly to grid. To obtain the Linear Time Invariant System, which describes the generator behavior, are chosen the qd-machine equations and the desired output of the whole system are both the active and reactive power. It is important to remark that whole system equations are linearized assuming steady state point.Preprin

A general approach for computing residues of partial-fraction expansion of transfer matrices

This paper deals with the description of a general method for calculating the residues of a linear system. Considering, physical models, it is well-assumed that the system described only presents simple eigenvalues, or at least simple-complex eigenvalues. However, as demonstrated in this paper, it is not completely true for all the real systems, and a method to evaluate the residues for these cases is required. In this paper, a methodology for computing the residues, even with the existence of multiple eigenvalues (described by their Jordan normal form) is developed and presented. Moreover, the calculation of the residues is applied to analyze the output-controllability of dynamic systems. Finally, some real examples are presented to validate the methodologies proposedPostprint (published version

Queratólise Puntacta

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Community identity, life satisfaction, empowerment and health: suggesting a model for the immigrant population

The academic literature shows that studies in the fields of Community Psychology and Group Psychology have reached the same conclusion: belonging to and identifying with a group has an impact on health. However, when the studies are reviewed, there seems to be little communication between those engaged in these two lines of work, as contributions made from the perspective of Community are not compared with those made from that of Social Identity. Therefore, this study opts for an integrative perspective that makes possible progress towards a political/social viewpoint. Specifically, it is sought to understand the relationship between identification with the neighbourhood in which one lives (what has been called "community identity") and the mental health of Malaga's immigrant population, a model being proposed in which the relationship between health and identity is mediated by empowerment.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Government of Spain's Ministry of Economy and Competitiveness, reference: PSI2013-40508-