593 research outputs found

    Graphic study and geovisualization of the old windmills of La Mancha (Spain)

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    In Spain, one can find geographical diversity and unique sites of great significance and cultural heritage. Many of the nation’s treasured places, however, have deteriorated or have even disappeared. What is left, then, should be studied and documented both graphically and infographically. It is important to preserve and document Spain’s unique locations, especially those related to vernacular heritage, to transhumance and visual impact assessment in many national infrastructures projects. Windmills are important examples of agro-industrial heritage and are sometimes found in the beds of streams and rivers but can also be found high in the hills. Their presence is constant throughout the Iberian Peninsula. These mills are no longer in use due to technological advances and the emergence of new grinding systems. The aim of this study was to present a specific methodology for the documentation of windmills, to create a graphical representation using computer graphics, as well as to disseminate knowledge of this agro-industrial heritage. This research has integrated graphic materials, including freehand sketches, photographs, digital orthophotos, computer graphics and multimedia in the creation of a specific methodology based on cutting-edge technology such as a digital photogrammetric workstation (DPW), global navigation satellite systems (GNSS), computer-aided design (CAD) and computer animation

    Kinetics of Formic Acid Dehydrogenation on Pt electrodes by Time-Resolved ATR-SEIRAS

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    The potential dependence of the rate of dehydration of formic acid to adsorbed CO (COad) on Pt at pH 1 has been studied on a polycrystalline Pt surface by time-resolved surface-enhanced infrared absorption spectroscopy in the attenuated total reflection mode (ATR-SEIRAS) with simultaneous recording of current transients after a potential step. A range of formic acid concentrations has been used to obtain a deeper insight into the mechanism of the reaction. Our experiments have allowed us to confirm that the potential dependence of the rate of dehydration has a bell shape, going through a maximum around the potential of zero total charge (pztc) of the most active site. The analysis of the integrated intensity and frequency of the bands corresponding to COL and COB/M shows a progressive population of the active sites on the surface. The observed potential dependence of the rate of formation of COad is consistent with a mechanism in which the reversible electroadsorption of HCOOad is followed by its rate-determining reduction to COad.L.P.-M. acknowledges a doctoral scholarship within the Leverhulme Centre for Doctoral Training in Sustainable Production of Chemicals and Materials (Grant DS-2017-073)

    A Web-based Environment Providing Remote Access to FPGA Platforms for Teaching Digital Hardware Design

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    In this work we present the design and implementation of a Web-based application for remote access to the FPGA boards in a Digital Design Laboratory. It enables students from specialization courses to afford the design exercises at any place and time, even at home, just with an Internet access and a Web browser. At the same time, it opens the possibility of prototyping small designs to the rest of students which have no access rights to the physical Laboratory

    Advantages of Software Integration from Initial Design through to Production Design

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    The purposes of this paper are, firstly, to show that Design For Production (DFP) is an important philosophy which cannot be ignored at any stage of design, and secondly, to show that an integrated Design For Production capability is now possible with present-day technology

    Docencia Semipresencial en Laboratorios Docentes para Diseño de Hardware Digital en la ETSIT-UPM

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    En esta comunicación se describe el planteamiento seguido en la ETSIT-UPM (Escuela Técnica Superior de Ingenieros de Telecomunicación – Universidad Politécnica de Madrid) para la formación de sus alumnos en diseño de hardware digital, y la utilidad que tiene el trabajo práctico con herramientas reales y sistemas de prototipado en cada una de sus etapas. A continuación, se detalla la aproximación seguida en nuestra Escuela para posibilitar el acceso de un mayor número de alumnos a los recursos de laboratorio mediante el empleo de las TIC (Tecnologías de la Información y las Comunicaciones). El objetivo final del trabajo desarrollado es dotar a los alumnos de la capacidad para acceder de forma remota a herramientas software de desarrollo y, especialmente, a plataformas de prototipado reales, todas ellas destinadas al diseño de hardware digital. Finalmente, se introducen algunos detalles técnicos relativos a una parte fundamental del desarrollo, que es la aplicación Web para el acceso remoto a las placas de prototipado- In this paper we describe the approach taken at ETSIT-UPM (School for Telecommunication Engineers – Technical University of Madrid) to teach digital hardware design, together with the possibilities of practising with real software tools and prototyping platforms. Next, we detail our approach to facilitate access to the hardware laboratory to a greater number of students by means of TIC (Information and Communication Technologies). The final goal of our work is providing students with remote access to software development tools and prototyping platforms, all of them devoted to digital hardware design. Finally, we describe some technical details of the Web application providing remote access to the prototyping boards

    Kinetics of formic acid dehydration on Pt electrodes by time-resolved ATR-SEIRAS

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    ACKNOWLEDGMENT L.P.-M. acknowledges a doctoral scholarship within the Leverhulme Centre for Doctoral Training in Sustainable Production of Chemicals and Materials (Grant DS-2017-073).Peer reviewedPublisher PD

    Dynamics of a polymerization model on a graph

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    This work is concerned with the dynamics of a polymerization process coupled with mass transfer and monomers injection, modeled by means of an infinite-dimensional system of Smoluchowski's equations in a finite graph. Under suitable assumptions on the system's aggregation coefficients, we show that, as a consequence of the injection mechanism, a sizable depletion of the pool of available reacting substances  occurs at some finite time, that can be estimated in terms of the parameters of the problem. By analogy with well-known results in chemical engineering, we interpret that result as the onset of a sol-gel phase transition. We suggest that this property might have some interest in the mathematical modeling of neurodegenerative processes, where the polymerization of some soluble proteins and their eventual aggregation into insoluble plaques play a remarkable role, which is not well understood as yet
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