2,176 research outputs found

    La lògica de l'espai construït al Sudest de la Península Ibèrica durant l'Argar (2200 - 1550 cal ANE) : una aproximació metodològica

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    L'estudi de l'arquitectura domèstica emprada per les societats del sud-est de la península Ibèrica durant l'Edat del Bronze requereix una sistematització de coneixements per esbrinar, en primer lloc, de quina manera construïen i sobretot quan temps invertien a construir els seus habitatges. És amb aquest objectiu que realitzem una proposta metodològica que conjuga disciplines com l'arquitectura, l'enginyeria i la mateixa restauració arqueològica sempre amb el propòsit de respondre aquestes qüestions fonamentals. Les respostes, al seu torn, ens proporcionen informació sobre el procés de producció i, per tant, ens aporten coneixement sobre les poblacions passades. Així doncs, proposem l'Anàlisi d'Elements Finits com una eina eficaç de resolució per a les nostres formulacions.The study of domestic architecture used by societies in the southeast of Iberia during Bronze Age requires a systematic and knowledges to determine firstly how to built and specially what time were invested to built their households. For this reason that we make a methodological approach which includes disciplines such as architecture, engineering or for example, archaeological restoration. Always the objective will be to answer these key issues wich also provide information about the process of production. Therefore provide information about lives of past populations. Thus, we propose the Finite Element Analysis (FEA) as an effective tool for solving our formulations

    Use of consumer-grade cameras to assess wheat N status and grain yield

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    Relationships between (a) fractional Intercepted PAR (fIPAR), and (b) aboveground biomass (Biomass) and (c) grain yield at harvest with the Normalized Difference Vegetation Index (NDVI) derived either from a spectroradiometer or a conventional camera at final grain filling (n = 12).Postprint (published version

    Aspects territoriaux et démographiques du Réseau des aires naturelles protégées de Castilla-La Mancha: 1978 -2014

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    The Autonomous Region of Castilla-La Mancha develops from the approval of the Spanish Constitution a whole executive and legislative branch to implement its policies on environmental protection. The new legislation (Law 9/1999, of 26 May) has pursued the conservation and the integral protection of the natural elements of the territory demanding to new criteria as such the environmental quality of ecosystems or the exceptional landscape. The spread and the declaration of new natural spaces have caused a double geographical and territorial model. First, natural spaces located in rural mountainous areas with depopulation and aging problems. And second, natural spaces situated in areas densely populatedLa Comunidad Autónoma de Castilla-La Mancha desarrolla a partir de la aprobación de la Constitución Española todo un aparato ejecutivo y legislativo para poner en marcha sus políticas en materia de protección medioambiental. La nueva normativa (Ley 9/1999, de 26 de mayo) ha buscado la conservación y protección integral de los elementos naturales del territorio atendiendo a nuevos criterios de selección como la calidad ambiental de los ecosistemas o la excepcionalidad paisajística. La proliferación y la declaración de los nuevos espacios naturales ha dado como resultado un doble modelo geográfico y territorial caracterizado por espacios naturales ubicados en ámbitos territoriales rurales, generalmente de montaña, donde confluyen problemas complejos de despoblación y envejecimiento y espacios naturales situados en zonas con mayor dinamismo y volumen demográfico.La Communauté Autonome de Castille -La Manche développe à partir de l'adoption de la Constitution espagnole tout un appareil exécutif et législatif pour mettre en oeuvre leurs politiques en matière de protection de l'environnement. La nouvelle législation (loi 9/1999, du 26 mai) a recherché la conservation et la protection intégrale des éléments naturels du territoire en fonction de nouveaux critères de sélection tels que la qualité environnementale des écosystèmes ou le caractère exceptionnel du paysage. La prolifération et la déclaration des nouveaux espaces naturels a entraîné un double modèle géographique et territorial caractérisé par des espaces naturels situés dans des domaines territoriales rurales où se retrouvent les problèmes complexes de dépeuplement et vieillissement des zones où sont localisés et des espaces naturels situés dans des zones à plus grand volume et de dynamisme démographique et de la population

    El paisaje fluvial del Valle del Cabriel: patrimonio cultural y natural como destino turístico de interior

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    XII Coloquio de Geografía del Turismo, Ocio y Recreación de la Asociación de Geógrafos Españoles. Colmenarejo (Madrid), del 17 al 19 de junio de 2010

    Fent servir el DIEC (I)

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    Severe poverty determinants in Spain using both a monetary and a deprivation approach

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    Los cambios experimentados por la sociedad española en las últimas décadas pueden haber modificado la distribución de la renta y el perfil de pobreza en nuestro país. El presente trabajo tiene como principal objetivo retomar el análisis de los factores socioeconómicos que determinan las situaciones de pobreza extrema en el nuevo milenio. Utilizando algunos indicadores monetarios tradicionales para la medición de la pobreza, los resultados demuestran que existen ciertos factores que perduran en el tiempo como determinantes de la pobreza extrema, mientras que otras variables han modificado su impacto. Esta visión monetaria de la pobreza se completa con un estudio de la misma desde un punto de vista de privación, comprobándose que, cuando se adopta un enfoque multidimensional, algunos de los factores que determinan la pobreza extrema cambian su efecto.Changes in Spanish society in last decades may have modified the income distribution and the poverty profile in our country. The main aim of this paper is to bring up to date the analysis of socioeconomic factors determining situations of severe poverty in the new millennium. Using some of the traditional monetary indexes for poverty measuring, results show the prevalence in time of several factors as determinants of severe poverty, whereas some other variables have modified their impact. This monetary vision of poverty is completed using a deprivation poverty approach; we may conclude that when a multidimensional approach is adopted, some of the factors determining severe poverty have a different effect

    Fractional processes: an application to finance

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    Mestrado em Matemática FinanceiraNeste trabalho é apresentada uma extensa descrição matemática, orientada para a modelação financeira, de três principais processos fracionários: o processo Browniano fracionário e os dois processos de Lévy fracionários. Mostram-se como estes processos podem ser originados. É explorado o conceito de auto-semelhança e apresentamos algumas noções de cálculo fracionário. Também é discutido o lugar destes processos no problema de encontrar o preço de derivados financeiros e apresentamos uma nova abordagem para a simulação do processo de Lévy fracionário que permite um método Monte Carlo para encontrar o preço de derivados financeiros.In this work it is presented an extensive mathematical description oriented to financial modelling based on three main fractional processes: the fractional Brownian motion and both fractional Lévy processes. It is shown how these processes were originated. The concept of self-similarity is explored and we present some notions of fractional calculus. It is discussed the opportunity of these processes in pricing financial derivatives and we present a new approach for simulation of the fractional Lévy process, which allows a Monte Carlo method for pricing financial derivatives.info:eu-repo/semantics/publishedVersio

    Water availability affects the capability of reflectance indices to estimate berry yield and quality attributes in rain-fed vineyards

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    Remote sensing methods are known to provide estimates of berry quality. However, previous studies have shown that the Normalized Difference Vegetation Index (NDVI) failed to predict berry quality attributes in rain-fed vineyards. This study explores the association of several reflectance indices with vine biophysical characteristics and berry yield and quality attributes and their temporal stability. The study was conducted in rain-fed Chardonnay vineyards located around Masquefa (Penedès region, Catalonia, Spain) over four years. Canopy reflectance, fractional Intercepted Photosynthetic Active Radiation, predawn water potential and canopy temperature at midday were measured at veraison whereas berry yield and quality attributes were determined at harvest. Water availability and vine biophysical attributes showed large temporal stability whereas berry quality attributes were not temporally stable. The capability of reflectance indices to estimate berry quality attributes was subject to the timing and extent of water deficits. The NDVI, the Photochemical Reflectance Index (PRI) and the Water Index (WI) provided estimates of berry quality attributes under mild, moderate and severe water deficits, respectively. These results might have potential applications in precision viticulture activities such as selective harvesting according to grape quality attributes and the assessment of ripening.Postprint (published version

    Civic and Social Infrastructure Conservation through Modern Architecture intervention. Embassy of Chile in Argentina 1966-2009

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    Modern heritage is not protected in Chile. Most of Chilean modern architectural heritage stands without an official decree protecting it from being modified or even demolished. This is a consequence of having state-controlled organisms in charge of the protection and defense of architectural heritage that use almost exclusively the building’s age as main criteria for its appraisement. From this point of view it seems difficult that constructions that are only between 40 and 90 years old may catch the attention of heritage preservation government officials. However negative the situation which, in the majority of cases has led to the systematic violation of constructions that constitute valuable records of the status of disciplinary and cultural discussion of Modern Architecture, the following case, paradoxically, couldn’t have crystallized the way it did, if the building had been officially protected, and neither could the docomomo–Chile group could have played a protagonic role in its managemen

    Sincronización y Estimación de canal eficiente y robusta en sistemas CoMP OFDM

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    Este trabajo fue presentado en el XXIX Simposium Nacional de la Unión Científica Internacional de Radio, celebrado los días 3-5 de septiembre de 2014 en la Universidad Politécnica de Valencia (España).In this paper, an efficient and robust simultaneous timing synchronization and channel estimation method for Cooperative MultiPoint Transmission and Reception (CoMP) is proposed. Efficiency is obtained by using the same two Orthogonal Frequency Division Multiplexing (OFDM) symbols for simultaneously transmitting preambles by all the base stations. Robustness is achieved by specially designed orthogonal sequences both in time and frequency domain. The proposed method is able to estimate the channels from several base stations without losing anything in performance with respect to the single transmission scenario. Furthermore, our proposed synchronization outperforms single transmitter methods and so, it could also be adapted for single base station OFDM systems.Este trabajo ha sido financiado parcialmente por los proyectos GRE3NSYST (TEC2011-29006-C03-03) y COMONSENS (CSD2008-00010).Publicad
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