171 research outputs found

    El Cuadro de mando integral

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    El trabajo se centra en la figura del mando integral como nueva herramienta enla gestión de las empresas de la era de la información para las cuales la contabilidad de gestón tradicional y sus métodos han quedado obsoletos. El trabajo se divide en tres partes diferentes: una introducción teórica al concepto de mando integral, un descripción del sector de distribución minorista de carburantes de automoción a través de estaciones de servicio en España y, por último,la aplicación del cuadro de mando integral a una de estas empresasDepartamento de Economía Financiera y ContabilidadGrado en Administración y Dirección de Empresa

    Displacement Calculus

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    In this work, we establish a theory of Calculus based on the new concept of displacement. We develop all the concepts and results necessary to go from the definition to differential equations, starting with topology and measure and moving on to differentiation and integration. We find interesting notions on the way, such as the integral with respect to a path of measures or the displacement derivative. We relate both of these two concepts by a Fundamental Theorem of Calculus. Finally, we develop the necessary framework in order to study displacement equations by relating them to Stieltjes differential equationsThis research was partially funded by Ministerio de Economía y Competitividad, Spain, and FEDER, project MTM2013-43014-P, and by the Agencia Estatal de Investigación (AEI) of Spain under grant MTM2016-75140-P, co-financed by the European Community fund FEDER. Ignacio Márquez Albés was partially supported by Xunta de Galicia, grant ED481A-2017/095S

    Existence and uniqueness of solution for Stieltjes differential equations with several derivators

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    In this paper, we study some existence and uniqueness results for systems of differential equations in which each of equations of the system involves a different Stieltjes derivative. Specifically, we show that this problems can only have one solution under the Osgood condition, or even, the Montel–Tonelli condition. We also explore some results guaranteeing the existence of solution under these conditions. Along the way, we obtain some interesting properties for the Lebesgue– Stieltjes integral associated to a finite sum of nondecreasing and left–continuous maps, as well as a characterization of the pseudometric topologies defined by this type of mapsIgnacio Márquez Albés was partially supported by Xunta de Galicia under grant ED481A-2017/095 and project ED431C 2019/02. F. Adrián F. Tojo was partially supported by Xunta de Galicia, project ED431C 2019/02, and by the Agencia Estatal de Investigación (AEI) of Spain under Grant MTM2016-75140-P, co-financed by the European Community fund FEDERS

    Desarrollo de aplicaciones para Smart TV usando la tecnología Android TV

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    Este documento presenta el Trabajo de Fin de Grado basado en el desarrollo de aplicaciones para Smart TV, mediante el uso de la tecnología Android TV. Se realiza un estudio y documentación de las diferentes alternativas actuales en el mundo de las Smart TV y, posteriormente, se centra dicho estudio en Android TV, la nueva apuesta de Google tras el cierre de su tecnología anterior, Google TV. Para ello se ha documentado dicha tecnología tan reciente, presentada en el año 2014, que ha permitido conocer sus funcionalidades y capacidades para descubrir si puede tratarse de una buena alternativa a las plataformas existentes. Para completar el estudio se ha desarrollado una aplicación para Android TV, partiendo de un código base proporcionado por Google, orientada por completo para su uso en un televisor y poder comprobar así, en primera persona, el funcionamiento de dicha tecnología.Ingeniería Telemátic

    Sistema de acoplamiento y accionamiento de manos artificiales para un robo manipulador

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    Treball final de Màster Universitari en Disseny i Fabricació (Pla de 2015). Codi: SDI413. Curs acadèmic: 2018/2019El alcance de este trabajo incluye el diseño, fabricación y montaje de todas las piezas necesarias para poder acoplar manos protésicas al brazo robot Dobot Magician. También incluye la programación del control del brazo para poder situarlo en distintas posiciones con la intención de realizar futuras pruebas o ensayos con las manos acopladas. Las trayectorias y movimientos obtenidos tras aplicar el control deberán poder ser simulados con antelación de forma virtual para poder verificar que son correctos antes de que el robot los ejecute. El control del movimiento de los dedos de las manos para realizar los agarres está fuera del alcance de este trabajo

    On first and second order linear Stieltjes differential equations

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    This work deals with the obtaining of solutions of first and second order Stieltjes differential equations. We define the notion of Stieltjes derivative on the whole domain of the functions involved, provide a notion of n-times continuously Stieltjes-differentiable functions and prove existence and uniqueness results of Stieltjes differential equations in the space of such functions. We also present the Green's functions associated to the different problems and an application to the Stieltjes harmonic oscillatorThe authors were partially supported by Xunta de Galicia, project ED431C 2019/02, and by the Agencia Estatal de Investigación (AEI) of Spain under grant MTM2016-75140-P, co-financed by the European Community fund FEDER. Ignacio Márquez Albés was partially supported by Xunta de Galicia under grant ED481B-2021-074S

    Effect of structural modifications on the drying kinetics of foods: changes in volume, surface area and product shape

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    Macro and micro-structural changes take place during food dehydration. Macro-structural changes encompass modifications in shape, area and volume. Studies of such changes are important because dehydration kinetics (essential for calculating industrial dryers) may be highly influenced by changes in food shape and dimensions. The overall changes in volume, surface area (“shrinkage”) and shape (Heywood factor, with provides a close description of food shape) were determined experimentally, and the results were correlated with simple expressions. Hence, although dehydration kinetics can be modeled with simplified overall shrinkage expressions, the possibility of selecting a suitable geometry and predicting the characteristics dimensions will provide higher accuracy. An additional unresolved problem is the lack of a general model that predicts macro-structural changes for various foods and diverse geometries. In this work, based on experimental data of sweet and sour cherries, and rose hip fruits, a simplified general model to predict changes in volume and surface area are proposed. To estimate how the changes in characteristic dimensions affect the kinetic studies, experimental drying curves for the three fruits by means of a diffusional model considered the following variants for the characteristic dimensions: (i) The radius of the fresh food, assumed constant; (ii) The radius of the partially dehydrated product; (iii) The radius predicted by the correlation for structural changes, especially volume, obtained in this work and generalized for the three fruits, and (iv) to demonstrate the need to study the macro-structural changes for all dehydrated foods, also be present the case of a restructured food.Facultad de Ciencias Exacta
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