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.

Investigación

Mostrando recursos 1 - 20 de 428

  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. Principales componentes de la imagen corporativa de entidades culturales

    Ramis Carrasco, María; Pérez Cabañero, Carmen
    [EN] In the present research, we carry out an analysis of the corporate image of a cultural organization which aims tohighlight its role in order to design management strategies in the cultural field. We investigate what particular attributes are better assessed by the public and which dimensions compose the corporate image of a cultural organization. Based on the literature review, we made an in-depth interview to the programming manager of a cultural organization and also a descriptive survey on its audience through a structured questionnaire.The results of the analyses show that the corporate image of the cultural organization under study...

  7. Nuevas metodologías expositivas en museos

    González Ceballos, Sara
    [EN] What we would like to achieve is a “estado de la cuestión” about new methodologies that are being used in the museums to create a link between the observer and the piece, which tools and methods are used, though analysis and observation. We are facing an important search of information, to update some of the old concepts about how to expose via impartial investigation

  8. Modelo de Evaluación para Ciudades Sensibles

    FERGNANI BRION, MARÍA FLORENCIA
    [EN] In this article we made a research about the Sentient Cities and produced an assessment model to analyse if a city is or could be potentially considered one. It can be used to evaluate the current situation of a city before introducing urban policies based on citizen participation in hybrid environments (physical and digital).To that effect, we've developedevaluation grids with the main elements that form a Sentient City and their measurement values. The Sentient City is a variation of the Smart City, also based on technology progress and innovation, but where the citizens are the principal agent. In thismodel, governments...

  9. La proyección exterior del teatro español contemporáneo: el papel del Centro Dramático Nacional y la Compañía Nacional de Teatro Clásico

    Colina Martín, Sergio; Gaviño, Carlota
    [EN] Efficient strategies in the field of cultural diplomacy, implemented in coherent ways by public administrations, can be crucial in promoting the internationalization of national theatre and the presence of Spanish creative agents abroad. From a perspective that combines cultural management analysis and an approach based on international relations, this article analyzes the role played by two Spanish public institutions (Centro Dramático Nacional and Compañía Nacional de Teatro Clásico) during the period 1978-2013, in an attempt to identify weaknesses and strengths in their historical developmentas well as future potentials

  10. Fracaso o mutación: Un derrotero azaroso tras una pérdida de objetivos

    Ruvira Palau, Lucas
    [EN] It is known that the term "culture" is very polysemic. The concept to which it alludes, even with scarce centuries of existence, is very broad and encompasses a myriad of definitions and connotations, which have been treated by ethologists, anthropologists and educators in their different fields. But almost all of them underlie a vision of knowledge transmission, as well as progressivity and growth. Cultural development can be considered as an imperative of behavior for personal and social development. However, in recent times this imperative seems to be blurred in a looser sense of its meaning, where other spurious meanings...

  11. Utilidad de los modelos de viscoelasticidad en el aprendizaje de la ingeniería de materiales poliméricos

    Fombuena Borrás, Vicent; Boronat Vitoria, Teodomiro; Sánchez Nacher, Lourdes; García Sanoguera, David; Balart Gimeno, Rafael Antonio
    [EN] The present article makes a brief description about the simplest mathematical models of viscoelasticity:Maxwell Model and Kelvin-Voigt Model. However, these basic models have a number of limitations becauseit has considerable di erences from reality. Thus, the Burgers model is studied due to is an appropriatemodel to study the viscoelasticity in polymers. By solving a practical case, the usefulness for studentsof mathematical models related with process such as creep or relaxation and their understanding andprediction of the mechanical behaviour has been revealed

  12. Una experiencia con Entornos Virtuales de Aprendizaje en Enseñanza Secundaria Obligatoria

    Orquín Serrano, Ismael; Aguado Sahagún, Henar
    [EN] In this work an experience using Virtual Learning Environment (VLE) in a secondary education schoolis described for third and fourth courses of secondary compulsory education, thus substituting standardbooks in class. The aim of this paper is showing the results of our study about the e ects of the use ofthis new tool through the analysis of the survey lled in by the students. Several features of the sampleof students are given to better understand the conclusions arising from the poll. Lastly, advantages anddisadvantages arising from the use of VLE in secondary education classrooms are analyzed in light of theresults...

  13. Proyecto Quick Natura. Tecnologías móviles aplicadas a rutas botánicas urbanas

    Ripoll, Sergio; Mayoral, Olga; Azkárraga, Jose Maria
    [EN] The Quick Natura project aims to approach people of the city of Valencia to the green areas around them,in a fast and pleasant way. The initiative is based on the use of new technologies to connect the physicalwith the virtual world by placing QR codes (Quick Response code) on di erent plant species, located mainlyin gardens and parks to display information about each labelled species. Any user can scan the QR codelocated in labelled plants by using a smartphone or other mobile devices, enabling almost immediate accessto an information layer displayed in an enjoyable way, without using very technical...

  14. Modelo experimental para estimar la viscosidad de fluidos no newtonianos: ajuste a expresiones matemáticas convencionales.

    Masoliver i Marcos, Guillem; Pérez-Sánchez, Modesto; López Jiménez, Petra Amparo
    [EN] The construction process of a viscometer, developed in collaboration with a nal project student, is he-re presented. It is intended to be used by rst year's students to know the viscosity as a uid property,for both Newtonian and non-Newtonian ows. Viscosity determination is crucial for the uids behaviorknowledge related to their reologic and physical properties. These have great implications in engineeringaspects such as friction or lubrication. With the present experimental model device three di erent uidsare analyzed (water, k etchup and a mixture with cornstarch and water). Tangential stress is measuredversus velocity in order to characterize all the uids...

  15. Modelado y análisis de datos procedentes de sistemas de imagen para diagnóstico médico mediante Mathematica

    Ortigosa, Nuria; Cerdá Boluda, Joaquín
    [EN] Modelling in Science Education and Learninghttp://polipapers.upv.es/index.php/MSELMSELModellingin Science Education and LearningModelling in Science Education and LearningVolume 10 (1), 2017doi: 10.4995/msel.2017.6662.Instituto Universitario de Matem atica Pura y AplicadaUniversitat Polit ecnica de Val enciaModelado y an alisis de datos procedentes desistemas de imagen para diagn ostico m edicomediante MathematicaModelling and analysis of data from imagingsystems for medical diagnosis usingMathematicaNuria Ortigosa, Joaqu n Cerd a BoludaUniversitat Polit ecnica de Val encianuorar@upvnet.upv.es, joacerbo@eln.upv.esAbstractLos sistemas de imagen para diagn ostico m edico son una de las tecnolog as que han despertado graninter es en los ultimos a~nos. Precisamente por presentar un marcado car acter multidisciplinar,...

  16. Matemáticas Dialógicas. ‘Yo soy de mates’

    Díez-Palomar, Javier
    [EN] In this article I introduce the dialogic mathematics approach, drawing on three successful educationalactions (SEAs): interactive groups, family involvement in mathematics, and dialogic mathematics gathe-rings. The main aim is to illustrate through these examples how SEAs, which previous studies have provedthat contribute to improve mathematics learning, work. I conclude that looking at interactions may openthe oor to better understand how we learn mathematics, while the creation of dialogic spaces based onsuch contributions may also be an opportunity to improve students' mathematics achievement.

  17. Los videojuegos como objeto de investigación incipiente en Educación Matemática

    Albarracín, Lluís; Hernández-Sabaté, Aura; Gorgorió, Núria
    [EN] This article presents a review of research made in the eld of mathematics education onthe use of video games in the classroom. These investigations have focused on four areas:impact in academic performance focused on mathematical contents, speci c mathematicalcontents learning, videogame design elements for mathematical learning and relation bet-ween videogames and problem solving. Finally, we propose two research new approachesthat have not been explored so far, like the use of commercial videogames for mathema-tical activities or the use of simulation games as environment to promote mathematicalmodeling

  18. La opinión de los estudiantes sobre metodologías docentes

    Carbó, S.; Meseguer, S.; Juan, P.
    [EN] We conducted an investigation into certain methodologies described by Finkel in his book((Teaching withyour mouth shut)). This research consists of an assessment carried out by students from I.E.S. Bovalarin Castell on through a survey. The research aims to prove whether there is a relationship between thosemethodologies that students consider more participatory, and those which they would like their teachers touse, in other words, if students prefer to use teaching methods which get them more involved, and wherethey are the center of the teaching-learning process. Following a stadistical analysis using SPSS, we canconclude that there is a direct relationship between...

  19. La enseñanza problematizada de la física cuántica en el bachillerato y en los cursos introductorios de física

    Savall Alemany, Francisco; Domènech Blanco, Josep Lluís; Martínez Torregrosa, Joaquín; Rey Cubero, Alexandra; Rosa Cintas, Sergio
    [EN] The e ectiveness of the problem based teaching on the science learning has been highlighted by the didacticresearch. This teaching model is characterized by organizing the units around problems and by proposinga research plan to nd a solution which requires concepts and models to be introduced in a functional way,as possible solutions to the problem. In this article we present a problem based unit for teaching quantumphysics in introductory physics courses and we analyze in detail the teaching strategy that we follow tobuild a model to explain the emission and absorption of radiation

  20. Introduciendo la dinámica de fluidos computacional en el análisis de flujos en medio poroso

    Salcedo, Ramón; Bayón Barrachina, Arnau; Chueca, Patricia
    [EN] This paper presents an introduction about how to model a ow through a porous medium with Computatio-nal Fluid Dynamics (CFD). To this end, a case study is proposed by simulating an air current produced bythe fan of an air assisted sprayer through a porous medium (vegetation). The work is aimed at adjustingthe porosity resistance to the air ow using experimental data. The adjustment assesses three scenarios:one, considering only equal inertial losses between di erent porous bodies, two, considering both inertiallosses and viscous losses and, three, considering only di erent inertial losses between di erent porousbodies. Finally, velocities obtained in each...

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