1,585 research outputs found

    Mecanismos de proyecto medievales. El caso cordobés a partir de sus parroquias

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    Se realiza un acercamiento a la planta de algunas iglesias parroquiales de Córdoba, comenzadas a construir a finales del siglo XIII. Por sus semejanzas, es posible suponer criterios de diseño comunes para la generación de su traza. Los planteamientos tienen en cuenta el modus operandi medieval, del que es buen ejemplo el 'Álbum de Villard', prestándose especial atención a uno de sus dibujos, el croquis de una planta cisterciense. Los resultados apuntan el uso de un sencillo modelo que permitirá generar la planta de todo un conjunto de edificios, los cuales estructurarían el tejido urbano de la ciudad bajomedieval

    Antecedents and consequences of bank reputation: a comparison of the United Kingdom and Spain

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    Purpose: – The purpose of this paper is to identify the key antecedents and consequences of bank reputation and whether their relative importance varies across countries. Design /methodological approach – The sample consists of 900 bank customers, representative of the national populations in the United Kingdom (500) and Spain (400), two of the countries in which the weight of the financial system on the GDP is much bigger than that of other European countries. The research hypotheses were tested by conducting a multi-group analysis with covariance-based structural equation modelling (CB-SEM). Findings: – In contrast with previous studies, it was discovered that the most important cognitive antecedent of banks’ reputation is reliability/financial strength. This study reinforces the prominence of satisfaction as a key emotional aspect of reputation. Differences between the United Kingdom and Spain were found in the impact of employer branding and corporate social responsibility (CSR). The positive effect of bank reputation on consumer behaviour (loyalty and word of mouth) and the existence of cross-country differences as regards loyalty were also confirmed. Originality/value: – This is a systematic cross-country analysis of corporate reputation which includes not only cognitive antecedents but also emotional determinants that have been repeatedly ignored. This paper sheds light on whether the antecedents and consequences of corporate reputation vary across countries. The choice of the banking sector provides a unique opportunity to observe the determinants and outcomes of corporate reputation following an unstable time in the banking sector

    La operatividad turística de los espacios culturales de origen industrial. Una valoración de los grupos de interés a través del método Delphi

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    En el municipio de Madrid existen espacios culturales ubicados en antiguas instalaciones industriales que, tras el cese de sus actividades productivas, han experimentado procesos de transformación especialmente a lo que a usos se refiere. Estos contenedores culturales han sido acogidos de forma positiva por la población local y han incrementado considerablemente la oferta cultural de la ciudad. A pesar del éxito cultural de estos antiguos espacios industriales, su operatividad como recursos turísticos resulta incomprensiblemente baja. A través de esta investigación, estructurada mediante el método Delphi, se han detectado cuáles son los factores más relevantes que, según el panel de expertos seleccionado, limita la funcionalidad turística de estos espacios

    Towards eLearning 2.0 University

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    The editorial introduction to the special issue: Towards eLearning 2.0 University. Interactive Learning Environment

    Brain morphometry in Florida kids in relations with some parameters of the growth

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    Se determinan los datos de peso, volumen y medidas lineales de los encéfalos de 44 cabritos (22 hembras y 22 machos) de raza Florida. Se valoran la diferencias encontradas según el sexo, la edad y el peso, así como las principales correlaciones entre los parámetros controlados

    Monte Carlo simulation of metal deposition on foreign substrates

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    The deposition of a metal on a foreign substrate is studied by means of grand canonical Monte Carlo simulations and a lattice-gas model with pair potential interactions between nearest neighbors. The influence of temperature and surface defects on adsorption isotherms and differential heat of adsorption is considered. The general trends can be explained in terms of the relative interactions between adsorbate atoms and substrate atoms. The systems Ag/Au(100), Ag/Pt(100), Au/Ag(100) and Pt/Ag(100) are analyzed as examples.Comment: 26 pages, 9 figure

    Influence of the substrate type on CVD grown homoepitaxial diamond layer quality by cross sectional TEM and CL analysis

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    To assess diamond-based semiconducting devices, a reduction of point defect levels and an accurate control of doping are required as well as the control of layer thickness. Among the analyses required to improve such parameters, cross sectional studies should take importance in the near future. The present contribution shows how FIB (focused ion beam) preparations followed by electron microscopy related techniques as TEM or CL allowed to performanalysis versus depth in the layer, doping and point defect levels. Three samples grown along the sameweek in the same machinewith identical growth conditions but on different substrates (CVD-IIIa (110) oriented, CVD-optical grade (100) oriented and a HPHT-Ib (100) oriented) are studied. Even though A-band is observed by CL, no dislocation is observed by CTEM. Point defect type and level are shown to substantially change with respect to the substrate type as well as the boron doping levels that vary within an order of magnitude. H3 present in the epilayer grown on HPHT type of substrate is replaced by T1 and NE3 point defects for epilayers grown on the CVD type one. An increase of excitonic transitions through LO phonons is also shown to take place near the surface while only TO ones are detected deeper in the epilayer. Such results highlight the importance of choosing the correct substrate.5 page

    Quantum Computing with Atomic Josephson Junction Arrays

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    We present a quantum computing scheme with atomic Josephson junction arrays. The system consists of a small number of atoms with three internal states and trapped in a far-off resonant optical lattice. Raman lasers provide the "Josephson" tunneling, and the collision interaction between atoms represent the "capacitive" couplings between the modes. The qubit states are collective states of the atoms with opposite persistent currents. This system is closely analogous to the superconducting flux qubit. Single qubit quantum logic gates are performed by modulating the Raman couplings, while two-qubit gates result from a tunnel coupling between neighboring wells. Readout is achieved by tuning the Raman coupling adiabatically between the Josephson regime to the Rabi regime, followed by a detection of atoms in internal electronic states. Decoherence mechanisms are studied in detail promising a high ratio between the decoherence time and the gate operation time.Comment: 7 figure

    Membrane disintegration caused by the steroid saponin digitonin is related to the presence of cholesterol

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    In the present investigation we studied the molecular mechanisms of the monodesmosidic saponin digitonin on natural and artificial membranes. We measured the hemolytic activity of digitonin on red blood cells (RBCs). Also different lipid membrane models (large unilamellar vesicles, LUVs, and giant unilamellar vesicles, GUVs) in the presence and absence of cholesterol were employed. The stability and permeability of the different vesicle systems were studied by using calcein release assay, GUVs membrane permeability assay using confocal microscopy (CM) and fluorescence correlation spectroscopy (FCS) and vesicle size measurement by dynamic light scattering (DLS). The results support the essential role of cholesterol in explaining how digitonin can disintegrate biological and artificial membranes. Digitonin induces membrane permeability or causes membrane rupturing only in the presence of cholesterol in an all-or-none mechanism. This effect depends on the concentrations of both digitonin and cholesterol. At low concentrations, digitonin induces membrane permeability while keeping the membrane intact. When digitonin is combined with other drugs, a synergistic potentiation can be observed because it facilitates their uptake
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