3,617 research outputs found

    An alternative methodology to predict aging effects on the mechanical properties of glass fiber reinforced cement (GRC)

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    The effect of three different aging methods (immersion in hot water, freeze–thaw cycles and wet–dry cycles) on the mechanical properties of GRC were studied and compared. Test results showed that immersion in hot water may be an unreliable method for modified GRC formulations, with it being in probability a very harmful procedure. A new aging method, mixing freeze–thaw cycles and wet–dry cycles, seems to be the most accurate simulation of weather conditions that produce a noticeable change in GRC mechanical properties. Future work should be carried out to find a correlation between real weather and the proposed aging method

    The role of metaphor in conceptual dependency

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    Sisenes Jornades de Foment de la Investigació de la FCHS (Any 2000-2001

    Using virtual worlds for the development of inclusive education: a glance at the future from the past of Second Life

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    "Second Life" es un entorno virtual con potencial para ser aplicado al desarrollo de la educación inclusiva por su carácter innovador, por promover la participación en un entorno en 3D de todos los alumnos que pueden acceder a la plataforma, por promulgar la colaboración en red de manera virtual y por acercar a los estudiantes al tipo de comunicación que utilizan en su tiempo de ocio y a las tecnologías que probablemente emplearán como profesionales. La utilización de entornos virtuales supone la proyección de los usuarios en avatares. La conexión entre la persona física y los avatares muestra la ambigua, difusa y borrosa línea que separa los mundos virtuales de la realidad. Es en este espacio en el que los docentes deben situar las actividades académicas, conectando y, simultáneamente, distinguiendo ambos mundos. Los avatares se convierten en herramientas para la empatía, para potenciar la relación entre pares y que posibilitan actividades académicas en un entorno distinto al aula física. No obstante, para que estas actividades tengan lugar, es necesario que se proporcionen unas condiciones de acceso idóneas a la plataforma a los estudiantes con discapacidad, mediante una adaptación de la interfaz y el software. De lo contrario, la tecnología virtual tendrá el efecto opuesto al propuesto: incrementará la brecha digital existente entre los alumnos con discapacidad y el resto de los estudiantes.Second Life is a virtual environment which could be used, with innovation and experimentation, for the inclusion of students with disabilities. SL promotes the participation of all the students in a 3D environment through collaboration in a virtual network, exercising the type of communication the students use in their leisure time and the technology they will probably employ in their professional career. The use of virtual environments involves the projection of users into avatars. The connection between the individuals and the avatars demonstrates the ambiguous and blurred line that separates reality and virtual worlds. It is in this space where educators must place the academic activities, connecting and simultaneously distinguishing both worlds. The avatars become tools for empathy, to enhance the relationship between peers and a medium to develop academic activities in an environment which is different from the physical classroom. Nevertheless, to develop educational activities in the metaverse, it is necessary to provide the appropriate access to the platform for students with disabilities, adapting the interface and software. Otherwise, virtual technology will increase the digital divide between students with disabilities and other students

    Ecoeficiencia y desarrollo de infraestructura urbana sostenible en Asia y América Latina: estrategias y medidas para el desarrollo de infraestructura de transporte urbano basada en principios de ecoeficiencia. Análisis aplicado al Área Metropolitana de La Serena y Coquimbo

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    Incluye bibliografíaEl presente estudio aborda el tema de la introducción de principios de ecoeficiencia en la provisión de infraestructura en dos dimensiones: la primera de orden institucional, explorando las actuales prácticas que realiza el sector público en este ámbito y las posibles estrategias para mejorarlas; la segunda, de orden técnico, analizando las herramientas y procesos de inversión que mejor rendimiento producen al momento de la toma de decisiones sobre proyectos específicos de infraestructur

    Necesidades de información en la empresa: la contabilidad

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    El propósito de este trabajo es explicar el porgué de la Contabilidad, haciendo una pequeña referencia a los antecedentes de esta ciencia. Conocer las unidades económicas a las que puede referirse y las principales características del entorno económico actual. Precisar quiénes son los usuarios de la información contable, y cuáles son sus necesidades de información. Finaliza el trabajo proporcionando una visión de conjunto de los principales sistemas de información contableThe intention of this work is to explain because of the Accounting, doing a small reference to the antecedents of this science. To know the economic units which can talk about and the main characteristics the present economic surroundings. To need who are the users of the countable information, and which are their necessities of information. A vision of set of the main countable information systems finalizes the work providin

    Indicadores Urbanos Activos (IURA): un camino hacia el Índice de Desarrollo Urbano

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    Gobernanza urbana en Galicia: cicatrices en la ciudad difusa

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    Synchronization in a ring of pulsating oscillators with bidirectional couplings

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    We study the dynamical behavior of an ensemble of oscillators interacting through short range bidirectional pulses. The geometry is 1D with periodic boundary conditions. Our interest is twofold. To explore the conditions required to reach fully synchronization and to invewstigate the time needed to get such state. We present both theoretical and numerical results.Comment: Revtex, 4 pages, 2 figures. To appear in Int. J. Bifurc. and Chao

    Government deficit sustainability, and monetary versus fiscal dominance: The case of Spain, 1850-2000

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    In this paper, we provide a test of the sustainability of the Spanish government deficit over the period 1850-2000, and examine the role played by monetary and fiscal dominance in order to get fiscal solvency. The longer than usual span of the data would allow us to obtain some more robust results on the fulfilling of the intertemporal budget constraint than in most of previous analyses. First, we analyze the relationship between primary surplus and debt, following the recent critique of Bohn (2007), and investigate the possibility of structural changes occurring along the period by means of the new approach of Kejriwal and Perron (2008). The analysis is complemented in two directions: (i) performing Granger-causality tests in order to distinguish properly between a fiscal dominant and a monetary dominant regime; and (ii) presenting the impulse-response functions of debt to innovations in the primary surplus, through the approach of Canzoneri, Cumby and Diba (2001).Fiscal policy, Sustainability, Fiscal Theory of the Price Level, Monetary dominance, Fiscal dominance.
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