Recursos de colección

RiuNet. Repositorio institucional de la Universitat de Valencia (98.188 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 5.647

  1. 24th ISUF International Conference. City and territory in the Globalización

    Colomer Sendra, Vicente
    XXIV ISUF Conference in Valencia marks as its objective the updating of studies in urban morphology and urban and territorial planning on a two-fold global concern, environmental sustainability and social and urban inequality, concern to be focused on the development of new analytical techniques. First concern, environmental sustainability, is addressed in Topics nº 1 "Stages in territorial configuration", nº 4, "Efficient use of resources for a sustainable city", nº 5 "Transforming the existing city", and nº 8, "Urban green space". Second concern, social and urban inequality, is addressed in Topics nº2 "Urban form and social use of space" and nº3, "Reading and...

  2. Entre mitos. Libros de artista

    NAVARRO GOIG, GEMA-MATILDE
    La exposición de obras reseñadas en este catálogo giran en torno a uno de los legados culturales que mejor definen y representan a nuestra especie: el mito. Este concepto, ampliamente utilizado por el arte y la literatura, se aborda aquí a partir de una selección de libros creados por artistas de reconocido prestigio, a nivel nacional e internacional, con una destacada presencia del grupo de investigación LAMP (El libro de artista como materialización del pensamiento), profesores de la Facultad de Bellas Artes de la Universitat Politècnica de València y de la Universidad de Palermo. Se trata de libros especiales no tanto...

  3. A polyhedral approach to the Rural Postman Problem

    Corberan, A.; Sanchís Llopis, José María
    [EN] In this paper we study the polyhedron associated with the Rural Postman Problem (RPP). Because the RPP is NP-hard, we cannot expect to find a complete description of the rural postman polyhedron of a general graph, but a partial knowledge of such a description frequently proves to be useful for both theoretical and computational purposes. We have tried to characterize the facial structure of this unbounded full-dimensional polyhedron. Sets of valid inequalities inducing facets have been studied as well as their use in a cutting-plane algorithm. The application of this algorithm to a set of RPP instances taken from...

  4. Una propuesta de Recorrido de Estudio e Investigación (REI): Diseño, simulación y decisión de una estrategia de pesca sostenible

    Boigues, Francisco J.; Estruch, Vicente D.; Roig, Bernardino; Vidal, Anna
    [EN] In ecology and fisheries management, growth models are very important. We present a proposal of a Research and Study Course (RSI) for the subject Mathematics of first course of the Environmental Science Degree in the Polytechnic School of Gandia, in which modeling is used to propose a sustainable policy for fisheries from data collected during initial growth period of close season. The aim is: i) Establishing a mathematical model for the evolution of the population throughout the study period (close season). ii) Fixed a minimum population to ensure a sustainable development of fisheries resources, proposing a fishing quota that...

  5. Modelización de esculturas en la enseñanza de las matemáticas

    Gómez-Collado, M.C.; Puchalt, J.; Sarrió, J.; Trujillo, M.
    [EN] Throughout history the mathematics have been present in disciplines such as engineering, social sciences, architecture and also painting and sculpture. In this work we study the mathematical modelling of some sculptures of the artist Jaume Espí and we propose the removal of this material to be used in the teaching of mathematics. In addition, with the help of graphic design programs such as 3DStudioMax we open the perspective of extrapolating these sculptural works to the field of architecture.

  6. Diseño en arquitectura y modelización matemática

    Gómez-Collado, M.C.; Puchalt, J.; Sarrió, J.; Trujillo, M.
    [EN] In this work we present mathematical modelling as a design tool in architecture. Our thesis is that mathematics joint with a suitable software, such as Mathematica, are a source of ideas for creating forms in architecture. In this sense we have designed new architectural volumes using mathematics as a main tool. The results support our thesis, since the volumes created with Mathematica have nothing to envy to others created with specific software for designing.

  7. Technical Evolution of Ceramic Tile Printing

    Sanz, V.; Reig, Y.; Feliú, C.; Bautista, Y.; Edwards Schachter, Mónica Elizabeth
    [EN] Ceramic tile decorating techniques have evolved significantly in recent years. Digital inkjet printing technology has enabled digital systems to be used for the direct decoration of ceramic tiles, revolutionizing ceramic tile decoration and providing many advantages over traditional decoration techniques. It was the formulation of inks with soluble and vitrifiable stains that allowed inkjet printing technology to be introduced into ceramic tile decoration. The incorporation of milled inorganic pigments into the inks broadened the available color palette. However, the colloidal instability of these inks and the constraints of the printing heads themselves made it necessary to reduce pigment particle...

  8. ABC classification of spare parts considering costs and service

    Cardós, Manuel; Guijarro, Ester; Babiloni, Eugenia
    [EN] This paper focuses on the multi-item problem where it is necessary to reach an overall stock availability of the spare parts while minimising involved costs. Over the last years, a number of authors have proposed a variety of approaches and provided different rules in order to classify items in ABC classes. An additional optimisation has to be performed in order to minimise the inventory cost while fulfilling a target service level. The proposed approach focuses on the characteristics of spare parts and optimises the inventory cost subject to the overall target fill rate by means of a closed form...

  9. Morphological and morphometric changes of sagittae otoliths related to fish growth in three Mugilidae species

    Callico Fortunato, Roberta Glenda; Benedito Durá, Vicent; González-Castro, M.; Volpedo, Alejandra
    [EN] The aim of this study was to analyze morphologic and morphometric changes of sagittae otoliths throughout the growth of three mullets: Mugil liza, Mugil cephalus and Liza ramada. Fish were collected seasonally between October 2011 and April 2014, and three methods were used: regression analysis of traditional biometric characters; morphological analysis for group identification; and morphometrical analysis of shape indices among groups (circularity, rectangularity, aspect ratio and percentage occupied by the sulcus). In all species, dependence of standard length on otolith length and height were best described as power functions. Two morphological groups were identified for M. liza and...

  10. Thermal hysteresis of microwave loss in (La1-xPrx)(0.7)Ca 0.3MnO3 films

    Kale, Sangeeta; Lofland, S.E.; Bhagat, S.M.; García Miquel, Ángel Héctor; Ogale, S.B.; Shinde, S.R.; Venkatesan, T.
    [EN] We have measured the temperature (T) dependencies of the dc resistances (R-dc) and the microwave loss (R-muw) in a variety of samples of (La1-xPrx)(0.7)Ca0.3MnO3 while varying x from 0 to 0.4. Whereas both the sets of data exhibit maxima, the ac loss peak is much flatter and, during cooling, appears at a much lower temperature than the peak temperature in R-dc. The discrepancy, which vanishes for x=0, increases with lowering tolerance factor (t) (or increasing x). Also R-muw vs T exhibits large thermal hysteresis for x=0.4 indicating that the transition is first order. Cooling in a magnetic field of...

  11. Very large magnetoimpedance effect in FeCoNi ferromagnetic tubes with high order magnetic anisotropy

    Kurlyandskaya, G.V.; Yakabchuk, H.; Kisker, E.; N.G. Bebenin; García Miquel, Ángel Héctor; Vázquez, M.; Vas'kovskiy, V.O.
    [EN] The extraordinarily high (up to 800% magnetoimpedance ratio) and sensitive magnetoimpedance effect has been found and studied in FeCoNi magnetic tubes electroplated onto CuBe nonmagnetic wire at frequency of about 1 MHz order. Special annealing was done in order to induce magnetic anisotropy. The high harmonic response has been studied, and the harmonics show larger variations with the external magnetic field than the fundamental. This huge sensitivity of the harmonics (up to an order of the tens of thousands %/Oe) is promising in regard to the increase of the sensitivity of giant magnetoimpedance sensors. To explain the experiment results,...

  12. Una propuesta para trabajar la proporción desde el arte

    Ferrando, Irene; Segura, Carlos
    [EN] We present a proposal addressed to students of the first courses of ESO. Through these activities, pupils will work concepts related with proportionality. Our proposal is developed along art history, the students will acquire skills related with proportionality through the uses the artists have done throughout history. Through a route beginning in ancient Egypt and ending in today Athens, students will act as the artists, architects or even tour guides to deal with technical problems and solve them mathematically. Some of the activities have been already implemented in the project Estalmat CV (a mathematic stimulation program for talented students)...

  13. Reflections from European examples on the teaching of modelling

    Cabassut, Richard
    [EN] Recommendations of European parliament and Rocard‘s report invite to develop the teaching of modelling. The European Commission programmes like LEMA, PRIMAS and STEAM support the development of resources, training and research on the teaching of modelling. We will study European examples about the teaching of modelling, from secondary and tertiary education and from pre-service and in-service teachers training. They point the different levels of determination and the different didactic questions related to students and teachers practices and to mathematical and didactical organisations. The example of the European program LEMA illustrates a teacher training course on modelling and the difficulties...

  14. Problemas de estimación de magnitudes no alcanzables: una propuesta de aula a partir de los modelos generados por los alumnos

    Albarracín, Lluís; Gorgorió, Núria
    [EN] In this paper we present a proposal to introducing modeling in Secondary School classrooms. The proposal is based on the use of a set of Fermi problems related to estimating large quantities. It uses the results of a previous study which describes the strategies proposed by the students to solve this kind of problems.

  15. Primeros pasos con las tareas de modelización en secundaria

    Gallart Palau, Cèsar; Garcia-Raffi, Lluís M.
    [EN] The growing importance of skills in our education system emphasizes the need not only of methodological changes in the teaching of mathematics in compulsory secondary education, but also to design new tools to develop the basic competences in general and mathematical competence in particular our students. The problems of modelling, in the context of realistic mathematics education, become an important tool for this purpose. In this paper we describe the design and implementation of a pilot activity modelling with students aged 15-16 as a first step in the introduction of this type tasks in the programming course.

  16. Ophthalmic: Laboratorio virtual para el diseño de nuevas lentes oftálmicas multifocales

    Calatayud, Arnau; Remón, Laura; Monsoriu, Juan A.; Giménez, Fernado; Furlan, Walter D.
    [EN] This work presents a new virtual laboratory, OPHTALMIC, developed with MATLAB GUI for using in Optics and Optometry courses as a computer tool for studying the focusing properties of multifocal diffractive both on unconventional structures both periodic and aperiodic. This virtual laboratory enables students to quickly and easily analyze the influence of the different parameters of construction and find the best solution for a user.

  17. Modelo para el trazado de una carretera entre dos paraboloides

    Lorente Arreba, Víctor José; Jiménez Fernández, Eduardo; Vicent Ferrando, Lorena
    [EN] We present a classroom task that consists to model the path of the road between two paraboloid surfaces. The purpose of this paper is to teach the differential calculus using mathematical modeling as a teaching tool. The context of the engineering design of a highway serves as a vehicle for teaching and learning the mathematical contents necessary for driving the task.

  18. Modelización no lineal de secciones aeronaúticas con EXCEL-SOLVER©

    Lázaro, Mario; Pérez Aparicio, José Luis
    [EN] The program MICROSOFT-EXCEL© has a great popularity in the professional world of engineering-consulting. The authors are aware of that from own experience. This is the reason that has led us to implement a nonlienar model to predict the ultimate strenght of fuselage and wings structures. The didactic methology has been developed for the subject Aircraft Structural Design in the 4th course of Aeronautical Engineering studies at the Polythecnic University of Valencia. The students show a high level of satisfaction since they learn nonlinear computational methods, valid for real structures; they are capable of the implementation with help of the...

  19. Innovación en la educación matemática: más allá de la tecnología

    Llinares, Salvador
    [EN] Relationships between mathematical competence and mathematics teaching innovation do emerge the need for new practices of mathematics teaching. One of the aspects of this new practice is the interaction patterns in the classroom characterizing the mathematical discourse. From these perspectives, the relation between innovation and new mathematics practices defines different contexts for professional development of mathematics teacher.

  20. Generación de fractales a partir del método de Newton

    Marín, María José; Giménez, Fernando; Monsoriu, Juan A.
    [EN] A large number of fractals known, as Julia fractals and Mandelbrot, can be generated from an iterative method. In this paper we present a virtual laboratory developed as a Graphical User Interface (GUI) of Matlab that allows us to study and visualize in real time the relationship between Newton iterative methods of two variables and the generation of fractals. The main objective is to allow Technical School students in Numerical Computation subjects to acquire the skills to generate fractals and interpret their plots in terms of the convergence or divergence speed of the sequence of iterated.

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