1,854 research outputs found

    Efectos de las estrategias empresariales de los AGENTES BANPRO en la SATISFACCION DE LOS CLIENTES en la ciudad de Estelí en el año 2014

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    El presente trabajo determina los efectos de las estrategias empresariales de los agentes BANPRO para diseñar propuestas que mejore la satisfacción de los clientes y agentes en la ciudad de Estelí en el año 2014. El desarrollo de este estudio se hizo tomando en cuenta el enfoque cualitativo. El universo de estudio fue 23 agentes los cuales se encuentran ubicados en el municipio, con un tipo de muestreo no probabilístico porque los sujetos de consulta son elegidos en base a criterios selectivos como: Propietarios de establecimientos bancarios, clientes de BANPRO que usan este servicio, disponibilidad de las personas en brindar la información. Los instrumentos utilizados en el estudio fue la entrevista, guía de observación y por carácter del segundo objetivo se aplico encuestas dirigidas a clientes. Una limitante para el crecimiento de estos agentes es la publicidad muchos clientes desconoce este servicio y es inevitable su desconfianza al utilizarlo por primera vez, otra es la ubicación del POS dentro del local porque no garantiza la seguridad del cliente, haciendo que los usuarios recurran a las sucursales bancarias para realizar sus pagos. Es fundament al que BANPRO diseñe planes estratégicos para mejorar las limitantes que tienen como diseñar ventanillas para estos establecimientos y la importancia de invertir en publicidad para dar a conocer lo que se ofert

    Transformacions aerodinĂ miques d'un tren de mercaderies per al seu Ăşs en vies d'alta velocitat

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    L'objectiu principal del projecte és desenvolupar una sèrie de transformacions en l'estructura externa dels trens de mercaderies per tal de disminuir la seva resistència a l'avanç. D'aquesta manera els trens dissenyats per a circular a baixes velocitats podran augmentar la seva celeritat de servei com a conseqüència d'un decreixement important en les forces resistives que crea l'aire. El resultat serà un tren de mercaderies preparat per funcionar en vies d'alta velocitat. L’estudi principal del projecte es basa en la realització de simulacions aerodinàmiques de varis models de trens, a dues velocitats diferents, mitjançant el programa COMSOL Multiphysics. El projecte parteix d’un model de tren de mercaderies existent a l’actualitat. Primerament s’ha dissenyat el model tren de mercaderies i, a continuació, les successives transformacions del mateix, dotant-lo d’un perfil més propi de trens d’alta velocitat, emprant el programa de disseny per ordinador SolidWorks. S’han realitzat simulacions per cada model de la locomotora, amb un vagó i amb dos vagons. Un cop fetes totes les simulacions necessàries, s’analitzen les dades obtingudes, els gràfics de velocitats i pressions i els valors de la força de resistència a l’avanç de cada model dissenyat. La realització d’aquest projecte pot garantir que, incorporant modificacions aerodinàmiques al disseny original, s’aconsegueix un augment de la velocitat de creuer a igualtat de potència. D’aquesta manera es redueix el temps de desplaçament en el transport de mercaderies, i probablement augmenti el nombre de clients que es decantin pel transport ferroviari de mercaderies, en detriment d’altres modes com pot ser el transport per carretera. S’aconseguiria, d’aquesta manera, una reducció notable d’agents contaminants

    Raman Spectroscopy and DFT calculations for the Electronic Structure Characterization of Conjugated Polymers

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    Flash presentationIn the last three decades, there has been a broad academic and industrial interest in conjugated polymers as semiconducting materials for organic electronics. Their applications in polymer light-emitting diodes (PLEDs), polymer solar cells (PSCs), and organic field-effect transistors (OFETs) offer opportunities for the resolution of energy issues as well as the development of display and information technologies1. Conjugated polymers provide several advantages including low cost, light weight, good flexibility, as well as solubility which make them readily processed and easily printed, removing the conventional photolithography for patterning2. A large library of polymer semiconductors have been synthesized and investigated with different building blocks, such as acenes or thiophene and derivatives, which have been employed to design new materials according to individual demands for specific applications. To design ideal conjugated polymers for specific applications, some general principles should be taken into account, including (i) side chains (ii) molecular weights, (iii) band gap and HOMO and LUMO energy levels, and (iv) suited morphology.3-6 The aim of this study is to elucidate the impact that substitution exerts on the molecular and electronic structure of π-conjugated polymers with outstanding performances in organic electronic devices. Different configurations of the π-conjugated backbones are analyzed: (i) donor-acceptor configuration, (ii) 1D lineal or 2D branched conjugated backbones, and (iii) encapsulated polymers (see Figure 1). Our combined vibrational spectroscopy and DFT study shows that small changes in the substitution pattern and in the molecular configuration have a strong impact on the electronic characteristics of these polymers. We hope this study can advance useful structure-property relationships of conjugated polymers and guide the design of new materials for organic electronic applications.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    Conjugated Polymers for Organic Electronics: Structural and Electronic Characteristics

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    The use of organic materials to design electronic devices has actually presented a broad interest for because they constitute an ecological and suitable resource for our current "electronic world". These materials provide several advantages (low cost, light weight, good flexibility and solubility to be easily printed) that cannot be afforded with silicium. They can also potentially interact with biological systems, something impossible with inorganic devices. Between these materials we can include small molecules, polymers, fullerenes, nanotubes, graphene, other carbon-based molecular structures and hybrid materials. Actually these materials are being used to build electronic structures into electronic devices, like organic light-emitting diodes (OLEDs), organic solar cells (OSCs), and organic field-effect transistors (OFETs), constituting and already commercial reality. Some of them are used on a widespread basis1, and are the focus of some recent researches in molecules2,3 and polymers4-6 suitable for these purposes. In this study we analyze the electronic and molecular characteristics of some different π-conjugated structures in order to evaluate their potential as semiconducting materials for organic electronics. For this purpose we focus on the study of conjugated polymers with different backbones configurations: (i) donor-acceptor configuration, (ii) 1D lineal or 2D branched conjugated backbones, and (iii) encapsulated polymers. To achieve this goal, we use a combined experimental and theoretical approach that includes electronic spectroscopies (i.e., absorption, emission and microsecond transient absorption), vibrational Raman spectroscopy and DFT calculations. These structural modifications are found to provoke a strong impact on the HOMO and LUMO levels and the molecular morphology, and, consequently, on their suitability as semiconductors in organic electronic applications.References 1. S. R. Forrest, M. E. Thompson. Chem. Rev., 2007, 107, 923 2. R. C. González-Cano, G. Saini, J. Jacob, J. T. López Navarrete, J. Casado and M. C. Ruiz Delgado. Chem. Eur. J. 2013, 19, 17165 3. J. L. Zafra, R. C. González-Cano, M. C. Ruiz Delgado, Z. Sun, Y. Li, J. T. López Navarrete, J. Wu and J. Casado. J. Chem. Phys. , 2014, 140, 054706 4. M. Goll, A. Ruff, E. Muks, F. Goerigk, B. Omiecienski, I. Ruff, R. C. González-Cano, J. T. López Navarrete, M. C. Ruiz Delgado, S. Ludwigs. Beilstein J. Org. Chem., 2015, 11, 335. 5. D. Herrero-Carvajal, A. de la Peña, R. C. González-Cano, C. Seoane, J. T. López Navarrete, J. L. Segura, J. Casado, M. C. Ruiz Delgado, J. Phys. Chem. C, 2014, 118, 9899. 6. M. Scheuble, Y. M. Gross, D. Trefz, M. Brinkmann, J. T. López Navarrete, M. C. Ruiz Delgado, and S. Ludwigs, Macromolecules, 2015, 48, 7049.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
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