Recursos de colección

RiuNet. Repositorio institucional de la Universitat de Valencia (72.956 recursos)

RiuNet es el Repositorio Institucional de la Universitat Politècnica de València, gestionado por la Biblioteca, cuyo objetivo es ofrecer acceso en Internet a la producción científica, académica y corporativa de la comunidad universitaria con la finalidad de aumentar su visibilidad y hacerla accesible y preservable.

Tesis doctorales

Mostrando recursos 1 - 20 de 2.909

  1. La ilustración de ciencias naturales y el automatismo gráfico como paradigmas de la búsqueda de objetividad y subjetividad a través del dibujo. Estudio teórico práctico.

    LÓPEZ TORNEL, JULIO
    This doctoral dissertation, entitled Illustration of Natural Science and Graphic Automatism as Paradigms of the Search for Objectivity and Subjectivity through Drawing. A Theoretical and Practical Study, is centered in the field of drawing and born from a series of insights arising from the artistic practice of the autor of the thesis. It is about and investigation that delves into how aspects of nature are represented, learned about, and comunicated through drawing. To do this, two seemingly opposite forms of drawing are juxtaposed: the automatic drawing, developed by the Surrealists in the second decade of the twentieth century (which is...

  2. Urbanismo y arquitectura medieval en La Pobla de Vallbona (Valencia)

    CONTELLES LLOPIS, ANA ISABEL
    Different studies have demonstrated how at the end of the 12th century, in Jaca - in Camino de Santiago (thanks to a few jurisdictions) a regular city was created, which was then passed along the Santiago route to the rest of Aragon and the Aragonese Crown. In this study, it can be seen that the regular medieval urbanism has also influenced our area and objectified in the colonised Valencian towns. Not only it is verified that these villas followed some guidelines in its planning, common patterns that reflected a model of medieval construction typified in a regular and orthogonal layout, but...

  3. Generación de líneas T-DNA de tomate (Solanum lycopersicum) para la identificación de mutantes de inserción alterados en la morfogénesis y el desarrollo vegetal

    SÁNCHEZ LÓPEZ, JORGE
    Knowledge of the key genes that affect the development of plants and their interaction with external agents is a very important aspect, both from a basic point of view and applied. Screening of mutagenized populations allows the identification of plants mutants and, from them, genes responsible for a particular character. Compared with other methodological alternatives (chemical or physical mutagens), insertional mutagenesis with T-DNA provides an additional advantage, the gene is tagged by an insert. Its identification is easier because it is possible to clone the mutated gene from the known T-DNA sequence. In order to identify genes that control early developmental...

  4. Modelización económica del ajuste por riesgo del gasto sanitario per cápita segun morbilidad en la Comunidad Valenciana

    Caballer Tarazona, Vicent
    Introduction Increased life expectancy and the resulting aging population have led to a rise in population with one or more chronic diseases. This creates the need for a more targeted approach to the care and treatment of the chronic and pluripatological patients in the health system. On the economic front, an increasingly aging population and the growing morbidity, coupled with constant innovation in medical technology induce greater healthcare expenditure. For these reasons, in the current backdrop of economic crisis and budgetary constraints as happens in Spain, it is essential to introduce management tools that help improve the efficiency of the health...

  5. Estudio del comportamiento y de la influencia en el desgaste de los aceites lubricantes de baja viscosidad en MCIA

    Miró Mezquita, Guillermo
    The current socio-economic and environmental context worldwide, with different actors and needs, requires continued progress towards energy efficiency and environmental improvements in order to create a sustainable future, and this implies a scientific and technologic effort to achieve the proposed goals. Transport by propulsive systems based on reciprocating internal combustion engines (ICE) is one of the major agents affecting future environmental sustainability. Included in the wide research done in this area, one of the options considered is the use of low viscosity oils (LVO) as an option for increasing ICE efficiency. This technology presents a modest contribution to the efficiency target,...

  6. New electrochemical cells for energy conversion and storage

    Navarrete Algaba, Laura
    In this thesis different materials have been developed to use them in electrochemical cells. The electrochemical cells studied can be divided into two material big groups: solids oxides and acid salts materials. In the first group, materials to use them in electrodes for fuel cells an electrolyzer based on oxygen ion conductor electrolytes were optimized. Pertaining to this group, the influence of doping the Ba0.5Sr0.5Co0.8Fe0.2O3-d perovskite with 3% of Y, Zr and Sc in B position (ABO3-d) was checked. That optimization could reduce the polarization resistance of electrodes and improve the stability with time. Additionally, the limiting mechanisms in the oxygen...

  7. Cross-view Embeddings for Information Retrieval

    GUPTA, PARTH ALOKKUMAR
    In this dissertation, we deal with the cross-view tasks related to information retrieval using embedding methods. We study existing methodologies and propose new methods to overcome their limitations. We formally introduce the concept of mixed-script IR, which deals with the challenges faced by an IR system when a language is written in different scripts because of various technological and sociological factors. Mixed-script terms are represented by a small and finite feature space comprised of character n-grams. We propose the cross-view autoencoder (CAE) to model such terms in an abstract space and CAE provides the state-of-the-art performance. We study a wide variety of models for cross-language information...

  8. Pronóstico probabilístico de eventos de sequías y evaluación del riesgo en la gestión de sistemas de recursos hídricos. Caso de estudio en una cuenca andina regulada

    AVILÉS AÑAZCO, ALEX MANUEL
    Hydroclimatic water shortage conditions can affect hydrological services offered by mountain basins causing severe impacts to the population benefiting from these resources. These conditions have become a real challenge for decision-makers in Andean basins with respect to the management of water resources systems in drought times. This thesis evaluates the risk of failure in the water supply by introducing probabilistic forecasts of drought events that serve as support for decision-making regarding the satisfaction of the consumptive demands, non-consumptive and environmental in scarcity times. Through a drought index (DI) created from the prioritization of available information about water-related variables, performance of...

  9. Understanding the formulation of business strategy in luxury firms, a mixed methods research including external market factors and internal managerial perspectives

    MILLAN PLANELLES, DAVID
    Abstract This Thesis is a research about the concept of luxury and its relationship to strategic Management. Motivations. The driver behind the elaboration of this study is to explore the complexity involved in managing luxury firms, and particularly the process of business strategy formulation. The research has been extensive in the case of the state of the art and the research phase. Nevertheless, the author acknowledges that his experience both as a business lecturer (postgraduate level) and as a private consultant has influenced the ability to gather further insights into this research. The ultimate motivation of this research is to contribute to academic...

  10. Escarola (Cichorium endivia L.): sistemas de manejo y ciclos como factores de la incidencia de fisiopatías y la acumulación de nitratos.

    GROMAZ ROIG, ANDREA
    Abstract Endive (Cichorium endivia L.) is a leafy vegetable mainly used in ready-to use salads. Nitrate accumulation, is a serious problem in this type of vegetables, because when ingested, nitrate has toxic effects in the human health. Solar radiation, nitrogen fertilization and temperature are some factors that affect nitrate concentration in leaves. 'Tipburn' , bolting and 'glassines' are some physiological disorders that appears in endives and impairs their marketable quality. 'Tipburn' is characterized by necrosis on the outside of leaves, and 'glassines' is associated with oil spots on leaves. In this thesis have been studied the influence of different environmental factors...

  11. MODELACIÓN DE LA CALIDAD DE LAS AGUAS EN LOS HUMEDALES ARTIFICIALES DE FLUJO SUPERFICIAL (HAFS). APLICACIÓN A LOS HAFS DEL TANCAT DE LA PIPA EN L'ALBUFERA DE VALENCIA.

    GARGALLO BELLÉS, SARA
    Constructed wetlands (CWs) are anthropically designed systems to improve and optimize certain physical and biochemical processes that occur in the ecosystems of natural wetlands with the main objective of removing pollutants from the water. This technology, which usually has been used for the treatment of urban wastewater, is being recently applied for treating a great variety of flows, including eutrophic water. Treatment efficiency of these systems depends on the interrelation of a great variety of processes and factors that hinder the establishment of simple principles for its design and/or exploitation. Therefore, mathematical models are useful tools to increase the knowledge about...

  12. Monitorización de calidad de servicios cloud mediante modelos en tiempo de ejecución

    CEDILLO ORELLANA, IRENE PRISCILA
    Cloud computing has brought many benefits to its users that are derived from its specific characteristics. However, it also creates new challenges as regards the provisioning of software and hardware services. One of the most significant challenges is the appropriate provisioning of high quality services that cloud providers should offer to their customers. Given the large number of cloud service providers, it is essential to supply customers with services that satisfy their needs and the expected level of quality. The characteristics of the Quality of Services (QoS) agreed upon between customers and providers are contained in Service Level Agreements (SLAs),...

  13. Ecos de Grecia: la cuestión pendiente. Bases históricas de la polifonía vocal e instrumental en el Mundo Clásico

    LAFARGA MARQUÉS, MANUEL
    No source explicitly supports the assumption that Greeks and Romans did not practice polyphony, nor does any surviving source point to the contrary. The second remark of Girolamo Mei remains in force nowadays: in contemporary pagan sources this fact isn't mentioned, nor is it in Christian contemporary or later sources after the fall of the pagan world. After this event, we find a historical gap for almost seven centuries (which not only affects music sources but to a greater extent) regarding the existence and dissemination of devices and instruments. Some of them reappeared with a similar design (bagpipes, lutes), while others...

  14. DESARROLLO Y OPTIMIZACIÓN DE NUEVOS PROCESOS PARA LA OBTENCIÓN DE PRODUCTOS DE LA PESCA AHUMADOS

    Rizo Párraga, Arancha María
    Fish salting and smoking industry need to innovate in their production processes, optimizing them to increase the profitability of its activities, improving the nutritional quality of their products and ensuring food safety. Currently, salting and smoking improvements focus primarily on speed up processes, using alternative techniques, which allow reducing processing steps, minimize waste and achieve a greater standardization of their products. In this study, a simultaneous salting-smoking method has been developed, employing a controlled salting, liquid smoke and water vapour permeable bags, to obtain smoked fish products. The feasibility of this technique was studied on three fish species (salmon, cod and...

  15. Control electrónico de metales preciosos soportados para catalizar reacciones de formación carbono-nitrógeno e hidrogenación de anillos aromáticos.

    Rubio Marqués, Paula
    In this thesis, different solids-containing precious metals has been prepared with controlled size and electronics, and used as catalysts for hydrogenation and hydroadition reactions, among others, obtaining prod-ucts of interest in Fine Chemistry. A palladium catalyst comprising <3 nm nanoparticules supported on carbon is capable of hydrogenating different nitroderivative compounds and subsequent cross-couplings of the amine generated in the process, with high chemoselectivity and at relatively low temperatures. Furthermore, this catalyst with a Lewis acid function allows to obtain cyclohexanone oxime directly from nitrobenzene under mild reaction condi-tions with yields above 95%. A carbon-supported nanoalloy platinum-ruthenium catalyst catalyzes the hydrogenation of different types...

  16. ESTUDIO DE LAS ALTERACIONES EN EL PATRON DE METILACIÓN DEL DNA DEL HUÉSPED INDUCIDAS POR UN VIROIDE NUCLEAR

    Castellano Pérez, Mayte
    In the first chapter, we determined that cucumber plants infected with hop stunt viroid (HSVd) accumulated high levels of sRNAs derived of ribosomal RNA (rb-sRNAs).Moreover, this effect was correlated with an increase of the transcription of the ribosomal RNAs precursors (rRNAs) due to a decrease in DNA methylation in its promoter region, revealing that certain ribosomal genes (usually silenced) reactivated its transcriptional activity during the infection. In the following chapter and in order to determine whether this process could be a common phenomenon to other plant-pathogen systems, we analyzed N.benthamiana transgenic plants that expressed, in a constitutive way, the viroid...

  17. High performance photonic devices for switching applications in silicon photonics

    Sánchez Diana, Luis David
    El silicio es la plataforma más prometedora para la integración fotónica, asegurando la compatibilidad con los procesos de fabricación CMOS y la producción en masa de dispositivos a bajo coste. Durante las últimas décadas, la tecnología fotónica basada en la plataforma de silicio ha mostrado un gran crecimiento, desarrollando diferentes tipos de dispositivos ópticos de alto rendimiento. Una de las posibilidades para continuar mejorando las prestaciones de los dispositivos fotónicos es mediante la combinación con otras tecnologías como la plasmónica o con nuevos materiales con propiedades excepcionales y compatibilidad CMOS. Las tecnologías híbridas pueden superar las limitaciones de la tecnología de...

  18. METODOLOGÍAS DE DISEÑO COMO PLATAFORMA PARA LA X-DISCIPLINARIDAD EN PROYECTOS TECNOLÓGICOS: SURFING DISCIPLINES

    BLANCO BASCUAS, MARÍA TERESA
    The transgression of the boundaries between disciplines is one of the main consequences of the progress of the Knowledge Society, and the simultaneous role of technological innovation as a factor and transformation framework is evident. This has led to a metamorphosis in society itself, establishing new models of behavior in a stream of technological innovation that is plural, multicultural and multidisciplinary. In this propagative and faceted scenario, the engines of innovation are no longer confined exclusively to the intrinsic progress of the technology itself, but also come into play those deliberate changes in the meaning of the product. As a...

  19. Chemometric Approaches for Systems Biology

    Folch Fortuny, Abel
    The present Ph.D. thesis is devoted to study, develop and apply approaches commonly used in chemometrics to the emerging field of systems biology. Existing procedures and new methods are applied to solve research and industrial questions in different multidisciplinary teams. The methodologies developed in this document will enrich the plethora of procedures employed within omic sciences to understand biological organisms and will improve processes in biotechnological industries integrating biological knowledge at different levels and exploiting the software packages derived from the thesis. This dissertation is structured in four parts. The first block describes the framework in which the contributions presented...

  20. Arte y migraciones hispanoamericanas en la globalización.

    TOVAR LARENAS, OLIVIER
    This thesis focuses on analysing the discourses and resources of the works of art related to the Hispanic-American migration since the fall of the Berlin Wall in 1989. This fall is the prelude to the polarization of the world, particularly in the economic sphere. Based on common criteria in the works of prestigious artists, in our research we propose groupings, classifications and pairings of the artistic contemporary products. The mentioned classifications objective or poetically document descriptions, opinions or criticisms about the various aspects of the exodus of the numerous Hispanic-American fractions, such as its origins, antecedents and consequences. The final document translates,...

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