Recursos de colección

RiuNet. Repositorio institucional de la Universitat de Valencia (74.547 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 54

  1. Use of standard and setup of non conventional techniques for the elimination of viruses associated with Fig Mosaic Disease (FMD) in fig germplasm (Ficus carica L.)

    YAHYAOUI, EMNA
    Abstract Ficus carica L. is considered one of the oldest fruit trees in the Mediterranean basin and is widely grown and harvested for the consumption of its fruits dry and fresh. This species is affected by different virus diseases, especially by Fig mosaic disease (FMD), for which Fig leaf mottle-associated virus 1 (FLMaV-1), Fig leaf mottle-associated virus 2 (FLMaV-2), Fig mild mottling-associated virus (FMMaV), Fig mosaic virus (FMV), Fig latent virus 1 (FLV-1), Fig badnavirus 1 (FBV-1) and Fig fleck-associated virus (FFkaV) are associated. FMD is the most widespread disorder of this species, which represents a threat and a constraint for...

  2. NUTRITIONAL AND HORMONAL FACTORS AFFECTING FRUIT SET IN AVOCADO (Persea americana Mill.)

    D'ASARO, ANTONIO
    Under favourable conditions, the avocado sets more fruits than the tree is able to bring to maturity, so that the plant adjusts, during the early stages of development, its ability to nourish them by modifying their number, that is, causing the fruit drop of those who can not maintain their growth rate. Accordingly, carbohydrate availability could be a key factor in the physiological abscission of these fruits. Since this species presents dichogamy, the abscission of fruits has also been attributed to the absence of pollination, but at the same time it has been related to failures in seed development, embryo...

  3. Ploidy manipulation for genetic improvement in some Mediterranean fruit crops

    CIMÒ, GIUSEPPE
    Plant breeding is focused on selection of new genotypes with improved traits. Conventional methods based on hybridization and those based on biotechnology (somatic hybridization, genetic transformation, ploidy manipulation, etc.) are used to create novel genetic variations. Biotechnology provides powerful tools for plant breeding, for instance, haploid technology allows achievement of homozygous lines from heterozygous parents in one step, which reduces significantly the time required by conventional methods. Concerning woody species, characterized by self-incompatibility, long juvenile period and high degree of heterozygosity, this technique is the only way to get homozygous lines. Haploid plants are of great interest for breeding and...

  4. Temperature regulating floral bud differentiation in loquat (Eriobotrya japonica Lindl.). Hormonal and genetic aspects.

    GARCÍA LORCA, ANA LUISA
    In loquat, apex of a current shoot changes from vegetative to reproductive stage during summer, i.e. under high temperature conditions. Indeed, just before floral bud differentiation, a decline in the growth rate due to high temperature takes place. The aim of this work is to study the role of this 'summer rest period' on the apex transition from vegetative to reproductive stage. For this purpose 1) sprouting of secondary shoots was promoted at different times, removing the main shoot, before, during and after floral bud differentiation occurred and 2) groups of trees were shifted to a greenhouse under average maximum...

  5. Evaluation of antioxidant properties and assessment of genetic diversity of Capparis spinosa cultivated in Pantelleria Island.

    LO BOSCO, FABRIZIA
    Capparis spinosa is a wild and cultivated bush, which grows mainly in the Mediterranean Basin. Unopened flower buds, called capers are used in the Mediterranean cuisine as flavoring for meat, vegetable and other foods. Several studies evaluated bioactive component and antioxidant activity of Capparis spinosa, increasing the market demand and the economic importance of capers. The aim of this work was to evaluate the contents of bioactive compounds in floral buds fermented in salt of C. spinosa collected from different areas of Pantelleria Island (Italy), testing the effect on healthy function as total antioxidant compounds. Hydrophilic extracts of C. spinosa from...

  6. CHARACTERISATION OF THE TENSILE BEHAVIOUR OF UHPFRC BY MEANS OF FOUR-POINT BENDING TESTS

    López Martínez, Juan Angel
    Combining the most recent technologies in concrete, Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC) arises as a promising material for the near future. UHPFRC have shown how flexible concrete can be to adapt to the ever-changing social and environmental demands. With its high flexibility composition and its mechanical properties, UHPFRC is full of both unexplored and unexploited possibilities. Engineers should take responsibility for this task. However, it is fair to acknowledge that this is not an easy task and it requires the development of reliable and widely accepted design standards provided by the scientific community. A major concern about durability, long-lasting structures and reduction...

  7. Evaluation of the impact of risk reduction indicators and epistemic uncertainty in dam safety governance

    MORALES TORRES, ADRIÁN
    Large dams are critical infrastructures whose failure could produce high economic and social consequences. For this reason, in recent years, the application of quantitative risk analysis to inform dam safety governance has risen significantly worldwide. This thesis is focused in how computed quantitative risk results can be useful to inform dam safety management. It proposes different methods and metrics to deal with the two key issues identified in this process: how risk results can be managed to prioritize potential investments and how uncertainty should be considered in quantitative risk models to inform decision making. Firstly, it is demonstrated that risk reduction indicators...

  8. Experiments on turbocharger compressor acoustics

    García Tíscar, Jorge
    As turbocharging requirements raise to face an increasingly stricter environmental regulation of internal combustion engines, concerns regarding their acoustic emission become more pressing. Since downsized engines require higher boost pressures and lower mass flow rates, the turbocharger compressor is forced to work at more unstable regimes, where flow patterns become more complex and noise levels rise. This thesis aims to thus to investigate these issues, proposing methodologies to characterize the acoustic emission of turbocharger compressors and implementing them in different experiments with a special focus on the link between acoustic emission and flow behaviour at unstable conditions. A literature review is...

  9. Improving Energy and Area Scalability of the Cache Hierarchy in CMPs

    Valls Mompó, Joan Josep
    As the core counts increase in each chip multiprocessor generation, CMPs should improve scalability in performance, area, and energy consumption to meet the demands of larger core counts. Directory-based protocols constitute the most scalable alternative. A conventional directory, however, suffers from an inefficient use of storage and energy. First, the large, non-scalable, sharer vectors consume unnecessary area and leakage, especially considering that most of the blocks tracked in a directory are cached by a single core. Second, although increasing directory size and associativity could boost system performance by reducing the coverage misses, it would come at the expense of area and energy consumption. This thesis focuses and...

  10. Improvement of interconnection networks for clusters: direct-indirect hybrid topology and HoL-blocking reduction routing

    PEÑARANDA CEBRIÁN, ROBERTO
    Nowadays, clusters of computers are used to solve computation intensive problems. These clusters take advantage of a large number of computing nodes to provide a high degree of parallelization. Interconnection networks are used to connect all these computing nodes. The interconnection network should be able to efficiently handle the traffic generated by this large number of nodes. Interconnection networks have different design parameters that define the behavior of the network. Two of them are the topology and the routing algorithm. The topology of a interconnection network defines how the different network elements are connected, while the routing algorithm determines the path that a packet must take...

  11. Aplicación de los otolitos en el estudio de la interconectividad de stocks pesqueros de mugílidos de zonas costeras de la provincia de Buenos Aires, Argentina y de la costa Valenciana, España.

    CALLICO FORTUNATO, ROBERTA GLENDA
    The aim of this thesis was to identify mugilid stocks in the Southwestern Atlantic coast (25°30'S-40°32'S) and in the Mediterranean coast of the Valencia Community (38º08'N-40°38-N), and their connectivity using the morphology, morphometry and chemical composition of sagittae otoliths (complex carbonate structures located in the inner ear of the fish). Morphology of sagittal for 9 Mugilidae species was analyzed; thus, being able to differentiate them and generating an identification key for the species. Moreover, morphological patterns for family and genera were proposed. Given that otoliths vary along fish growth, ontogenetic patterns were identified for Mugil liza, Mugil cephalus and Liza...

  12. Screening methodologies for the determination of water contaminant residues by compact disk technology

    DOBOSZ, PAULINA DOROTA
    The contamination of water resources with many industrial, agricultural and other chemicals is one of the key environmental problems that humanity is facing nowadays. Despite the fact that they are usually present at very low concentration, they possess a significant risk to aquatic and human life. To address this issue many national and international institutions set different regulations to monitor and control the water quality. Currently, the monitoring of compounds included in official watch lists is conducted by chromatographic and mass spectroscopic methods. These techniques are approved as "gold standards" for analytical quantitation of organic residues in water. Although they...

  13. EFFECT OF ENZYMATIC TREATMENTS ON CARBOHYDRATE MATRICES TOWARDS HEALTHY GLUTEN FREE FOODS APPLICATION

    DURÁ DE MIGUEL, ÁNGELA
    Starch is the major energy reserve in plants, extensively present in many food and non-food applications, and is one of the most abundant carbohydrates in human diet. In addition to starch native form currently used as a raw material for industrial applications, modified starches have become very attractive to develop numerous products that have greatly expanded starch use and utility. Enzymatic modifications are carried out to enhance starch functionality with the aim of overcoming technological constraints and to improve final product quality. Above all starches, corn starch is widely produced and consumed, and used as main ingredient to produce gluten-free...

  14. Diseño y aplicaciones de nuevas estructuras difractivas aperiódicas.

    FERRANDO MARTÍN, VICENTE
    The diffractive optical elements have enhanced his importance in the last decades due to the improvement of the technology which allows its construction and the greater computing power that helps predicting the behaviour of the diffractive structures in function of the design parameters without en extra cost. The periodic symmetry become a key factor in order to understand the performance of these elements, and it allows to study the properties and the applicability of the different diffractive elements. However, this periodicity also introduces certain limitation in the design of the elements and their properties, such as high chromatic aberration when...

  15. Sistemas dinámicos con retardos temporales: contribución al desarrollo de predictores robustos para el control de sistemas inestables

    García Gil, Pedro José
    Una de las mayores dificultades en el diseño de un sistema de control es sin duda la presencia de retardos, máxime si el sistema que se pretende controlar es inestable en bucle abierto y/o de fase no mínima. Los retardos temporales pueden ser intrínsecos a los procesos a controlar, véase por ejemplo los procesos químicos, biológicos, columnas de destilación, procesos con intercambios térmicos, etc, o bien introducirse en el sistema de control por el propio diseño del mismo (tiempo de cómputo del algoritmo de control, sistemas distribuidos, control remoto, redes de comunicaciones, retardos introducidos por los sensores y/o actuadores, etc.). El Predictor de Smith, así como sus múltiples extensiones, y la...

  16. An Approach to support the Strategies Alignment Process in Collaborative Networks

    Andrés Navarro, Beatriz
    [EN] Manufacturing enterprises are more and more aware of establishing collaborative relationships with the network partners, due to the advantages associated. Especially, the participation of small and medium-sized enterprises (SMEs) in collaborative networks (CN) leads to enhance their competitiveness, by increasing their agility, responsiveness and adaptability to deal with the rapid market evolutions, and the business globalization. Nevertheless, the participation in CN has associated challenges, especially for SMEs, which are derived from the lack of resources and capabilities, and the limitations associated to cultural barriers. CN consist of autonomous partners, each one defining its own objectives and formulating its own strategies....

  17. TRANSFORMACIONES URBANAS EN LA CIUDAD DE TERUEL: RECONSTRUCCIÓN Y ANÁLISIS GRÁFICO

    SANCHO MIR, MIGUEL
    [EN] The city of Teruel was founded in 1177 by Alfonso II as a strategic enclave for the Aragonese conquest towards Levante, and it was granted its own jurisdiction. Just before the new Christian town, there is documentary evidence of a minor Muslim settlement in the area, Tirwal, with several theories about its exact location and actual significance. The sands of time will set its stamp on the morphology and the urban landscape of Teruel, based on its medieval background, but it will still be transformed and adapted, where a complex image will be generated as a result and legacy of...

  18. Presencia y usos del bajón en Valencia durante los siglos XVI al XX y transferencia de sus funciones al fagot.

    GIMENEZ MARTINEZ, OVIDIO
    [EN] This Doctoral Thesis is a study on the presence and use of the bassoon, musical instrument predecessor of the bassoon, in the Valencia area. Based on a comparison with the rest of the national and international scene we have defined the period of existence of this instrument determining which were the specific dates and causes of both its appearance and its extinction. We have also been established as the downturn musical functions were assumed by the bassoon. Chronologically documented the existence of numerous bajonistas performers, musical compositions where data has undeniable role, musical treatises and iconography. Also part of this thesis study...

  19. Valoración de inmuebles urbanos comparativa modelo regresión multivariable versus redes neuronales artificiales para la ciudad de Morelia Michoacán, México.

    PRECIADO CARRILLO, JOSÉ CARLOS
    [EN] To obtain the market value for urban properties, the following is necessary for the decision making in different scenarios: in case of dealing with financial institutions, the focus will be in acquiring knowledge of the value of the property to finance a mortgage. One of the different government orders are to collect property taxes, so this profit will serve as the foundation for proceedings before public and private organizations. For an accurate estimate of the price or value that will describe the market conditions, it is necessary to build models that will be capable of calculating such value. The...

  20. Nuevos museos y nuevas tecnologías: una propuesta de musealización para el cementerio general de Valencia.

    ESCRIVÁ ESTEVAN, FINA
    [EN] This research focused on the value enhancement strategy of the main graveyard in Valencia. This monumental cemetery, created at the beginning of the nineteen-century, has an important heritage needed of an urgent revalorization. Considering the sociocultural changes related to the management of cemeteries and their increasing role on heritage and tourism, a musealization route is created with the aim to contribute to the conservation and the diffusion of this heritage, particularly the Cementerio General de Valencia. Nowadays, many efforts have been carried out from the main European associations in order to set up different musealization projects. In fact, we took advantage...

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