984 resultados para frames tecnológicos


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[ES] Análisis de la Loza Tradicional Canaria y estudio de nuevos procesos existentes para su conservación y divulgación digital

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The main scope of this Ph.D. thesis has concerned the possible transformations of bridging ligands in diiron complexes, in order to explore unconventional routes to the synthesis of new functionalized multisite bound organic frames. The results achieved during the Ph.D. can be summarized in the following points: 1) We have extended the assembling between small unsaturated molecules and bridging carbyne ligands in diiron complexes to other species. In particular, we have investigated the coupling between olefins and thiocarbyne, leading to the synthesis of thioallylidene bridging diiron complexes. Then, we have extended the study to the coupling between olefins and aminocarbyne. This result shows that the coupling between activated olefins and heteroatom substituted bridging carbynes has a general character. 2) As we have shown, the coupling of bridging alkylidyne ligands with alkynes and alkenes provides excellent routes to the synthesis of bridging C3 hydrocarbyl ligands. As a possible extension of these results we have examined the synthesis of C4 bridging frames through the combination of bridging alkylidynes with allenes. Also in this case the reaction has a general character. 3) Diiron complexes bearing bridging functionalized C3 organic frames display the presence of donor atoms, such as N and S, potentially able to coordinate unsaturated metal fragments. Thus, we have studied the possibility for these systems to act as ‘organometallic ligands’, in particular towards Pd and Rh. 4) The possibility of releasing the organic frame from the bridging coordination appears particularly appealing in the direction of a metal-assisted organic synthesis. Within this field, we have investigated the possibility of involving the C3 bridging ligand in cycloaddition reactions with alkynes, with the aim of generating variously functionalized five-membered cycles. The [3+2] cyclization does not lead to the complete release of the organic fragment but rather it produces its transformation into a cyclopentadienyl ring, which remains coordinated to one Fe atom. This result introduces a new approach to the formation of polyfunctionalised ferrocenes. 5) Furthermore, I have spent a research period of about six months at the Department of Inorganic Chemistry of the Barcelona University, under the supervision of Prof. Concepción López, with the aim of studying the chemistry of polydentate ferrocenyl ligands and their use in organometallic synthesis.

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This research work faces the problem of insertion of viscous dampers into Moment Resisiting Frames (MRF) for maximum efficiency in mitigation of the seismic effects. The work would lead to a precise design indication. The fundamental result of the thesis consists in showing that, even for moment-resisting structures, you can design a system of added viscous dampers able to achieve target levels of performances. Ie given the reduction factor in the seismic response, discover the characteristics of the viscous dampers which allow to achieve it.

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Corporations, nongovernmental organizations, and other organizational forms are major players in the sodal world. Recently, sociological scholarship on organizations has converged with research on the professions to discuss the ways in which professions are shaped or influenced by different organizational forms. In this article, I borrows from the notion of framing within social movement research to argue that organizational forms frame the bids of aspiring professionals. More specifically, I argue that certain organizational forms-such as that of the modern corporation-can aid would-be professionals in making their claims for professional recognition. Organizations do this, I argue, by providing aspiring professionals with a ready-made setting, rationale, and guarantees that make the newcomers more easily recognizable as professionals to outside audiences. I explore this argument by examining how the corporate form has facilitated private military contractors in their attempts to legitimate and develop this highly controversial new industry. The data are drawn from my interviews with private military contractors, state officials, and other interested parties surrounding private military corporations, as well as from archival data that detail the rise of the private military industry.

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In this paper, the well-known method of frames approach to the signal decomposition problem is reformulated as a certain bilevel goal-attainment linear least squares problem. As a consequence, a numerically robust variant of the method, named approximating method of frames, is proposed on the basis of a certain minimal Euclidean norm approximating splitting pseudo-iteration-wise method.

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Biofuel production, while highly contested, is supported by a number of policies worldwide. Ethiopia was among the first sub-Saharan countries to devise a biofuel policy strategy to guide the associated demand toward sustainable development. In this paper, I discuss Ethiopia’s biofuel policy from an interpretative research position using a frames approach and argue that useful insights can be obtained by paying more attention to national contexts and values represented in the debates on whether biofuel production can or will contribute to sustainable development. To this end, I was able to distinguish three major frames used in the Ethiopian debate on biofuels: an environmental rehabilitation frame, a green revolution frame and a legitimacy frame. The article concludes that actors advocating for frames related to social and human issues have difficulties entering the debate and forming alliances, and that those voices need to be included in order for Ethiopia to develop a sustainable biofuel sector.

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Proyecto 16H315. Repositorios de tesis de posgrado: Capacidad del sistema académico NEA para la generación de depósitos de tesis de acceso libre / Belarmina Benítez, dir.; María Norma Prevosti, codir. Secretaría de Investigación y Posgrado, Facultad de Humanidades y Ciencias Sociales. Universidad Nacional de Misiones.

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La intención del presente catálogo es procurar y permitir la difusión y transferencia de los proyectos de investigación que están desarrollando docentes e investigadores de las distintas unidades académicas de la Universidad Nacional de Cuyo sobre las diferentes problemáticas de la actividad vitivinícola en nuestra provincia. Con esto se busca ofrecer este conocimiento y ponerlo a disposición del sector privado dedicado a la vitivinicultura, como así también a organismos públicos nacionales, provinciales y locales preocupados por el buen desarrollo del sector. Es una guía sencilla, ordenada por temas, que incluye los títulos de los proyectos, un resumen ejecutivo de cada uno de ellos, los principales resultados obtenidos y los datos de contacto del Instituto de Ciencias Ambientales, en caso de que alguno de ellos sea de interés. La finalidad es ofrecer una herramienta de información confiable, rigurosa, seria, apropiada y oportuna. Este inventario de proyectos ha sido elaborado desde el Instituto de Ciencias Ambientales, dependiente de la Secretaría de Desarrollo Institucional, conjuntamente con la Secretaría de Ciencia, Técnica y Posgrado de la Universidad Nacional de Cuyo y con la colaboración de la Corporación Vitivinícola Argentina, a través del proyecto Observatorio Vitivinícola.

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Se realizó un análisis sobre la producción académica en Bibliotecología y Ciencia de la Información de la región Iberoamericana -artículos científicos y ponencias presentadas en eventos- con el objetivo de identificar en la literatura trabajos con contenidos tecnológicos definidos, para luego describir y cuantificar los temas tratados. En una segunda etapa, se realizó una exploración preliminar de los planes de estudio de algunas escuelas de Bibliotecología y Ciencia de la Información de nuestra región, con la idea de observar el tratamiento de esos temas en la currícula. Los resultados preliminares pretenden mostrar la relación existente entre los intereses tecnológicos de la comunidad profesional de la región y su tratamiento por parte de las Escuelas de Bibliotecología. Por otro lado la información recopilada podría constituirse en una herramienta para la realización de estudios longitudinales sobre la fluctuación en el tiempo de las diferentes temáticas, su ascenso y consolidación o su desaparición