Carlos González

Analisam-se neste artigo alguns resultados matemáticos que já foram assinalados como contrários à intuição e se realiza uma pesquisa das possíveis causas desse caráter contraintuitivo. Nesse sentido, são estudados o Paradoxo de Galileu, a demonstração de Cantor de que o segmento tem a mesma quantidade de pontos que o quadrado e o Paradoxo de Tarski-Banach. Primeiro é discutido o papel que o conceito de infinito e princípios como “o todo é maior que a parte” têm nesses paradoxos. Em segundo lugar, é estudada a influência que as intuições geométricas têm em alguns paradoxos e a relação delas com a concepção de geometria do Erlanger Programm de Felix Klein

Suele referirse a los tristes acontecimientos del 11 de septiembre del 2001 como la "pérdida de la inocencia" de la sociedad estadounidense, refiriéndose al despertar a una pesadilla: la del terrorismo en casa, de la enorme vulnerabilidad de su vida doméstica. La década de los años sesentas del siglo XX sirvió de escenario para otra pérdida de la inocencia, al ver fallar a su país como el eficiente melting pot cultural que creían ser, y también al atestiguar cómo la fanática guerra contra el comunismo, no sólo desangraba a una nación pobre como Vietnam, sino que fracasaba militarmente y en sus intentos por crearle un consenso dentro de los Estados Unidos.

Resumen: En este artículo analizamos, en un corpus del diario La Nación, la ideología de la cobertura mediática respecto del conflicto chileno-mapuche durante el primer gobierno de Michelle Bachelet Jeria. En particular, nos preocupa dar cuenta de la forma en que son retratados en este periódico los comuneros indígenas y los personeros de gobierno. Para ello, en primer lugar, describimos la caracterización de estos dos tipos de actores a partir de un análisis de contenido, y luego, en una segunda parte, damos cuenta del panorama ideológico general en donde se insertan estas construcciones. Concluimos que la cobertura del diario se funda en tres puntos nodales: en primer lugar, el “reconocimiento cultural”, donde prima la construcción del llamado indio permitido; en segundo lugar, la “seguridad pública”, donde predomina la imagen del indio insurrecto. Estos dos puntos, el “reconocimiento cultural” y la “seguridad pública”, siempre van en la dirección de insinuar “competencia gubernamental”, el tercer punto nodal, entendido como “éxito y destreza en la generación de gobernabilidad”, parte fundamental en el proyecto político de la Concertación de Partidos por la Democracia.: In this article we analyze the ideology behind chilean newspaper La Nacion’s coverage of the chilean-mapuche conflict, specifically during the first government of Michelle Bachelet Jeria. We try to account for the way both indigenous subjects and government officials are portrayed, characterizing these types of actors, to later, in a second part, attempt to account for the general ideological landscape in which these constructs are inserted. We conclude that the coverage moves between three nodal points: first, “cultural recognition”, in which we find the indio permitido; second, “public security”, where we find the indio insurrecto. Both these nodal points always seem to imply the third one: “governmental competence”, understood as success and skill in generating political governance, a fundamental part of the Concertacion’s political project.

Aberrations introduced by the atmospheric turbulence in large telescopes are compensated using adaptive optics systems, where the use of deformable mirrors and multiple sensors relies on complex control systems. Recently, the development of larger scales of telescopes as the E-ELT or TMT has created a computational challenge due to the increasing complexity of the new adaptive optics systems. The Complex Atmospheric Reconstructor based on Machine Learning is an algorithm based on artificial neural networks, designed to compensate the atmospheric turbulence. During recent years, the use of GPUs has been proved to be a great solution to speed up the learning process of neural networks, and different frameworks have been created to ease their development. The implementation of CARMEN in different Multi-GPU frameworks is presented in this paper, along with its development in a language originally developed for GPU, like CUDA. This implementation offers the best response for all the presented cases, although its advantage of using more than one GPU occurs only in large networks.

Some properties and an algorithm for solving systems of multivariate polynomial equations over finite fields are presented. It is then shown how formulas of propositional logics can be translated into polynomials over finite fields in such a way that several logic problems are expressed in terms of algebraic problems. Consequently, algebraic properties and algorithms can be used to solve the algebraically-represented logic problems. The methods described herein combine and generalise those of various previous works.

Las enseñanzas de Arquitectura en España han sufrido cambios significativos en el ámbito normativo en los últimos 50 años. La formación de la Arquitectura, basada mayoritariamente en el formato de taller, constituye un elemento de articulación entre distintas técnicas de aprendizaje. En este trabajo se plantea una aproximación a un Método de Aprendizaje Emocional (MAE), que pretende integrar, en el ámbito de Bolonia, una metodología docente específicamente sensible a las enseñanzas de Arquitectura. Los resultados obtenidos en los dos últimos cursos, desde que se implantó la titulación en la Universidad Antonio de Nebrija, han sido prometedores y sobre todo han significado un estímulo para docentes y alumnos. Entendemos que esta metodología de aprendizaje es transferible a titulaciones de corte tanto teórico como artístico o humanista.

Corporate, Social, Ethical and Environmental Reporting should ideally discharge the accountability of an organisation to its stakeholders. Voluntary reporting has been characterised by a dearth of neutral and objective information such that the advocates of SEER recommend that it be made compulsory. Their underlying rationale is that legally specified disclosure requirements and enforcement mechanisms will enhance the quality of such reporting. This paper sets out to explore how realistic this scenario actually is, in view of the conflicting interpretations in the literature on this subject. To that end, a survey of the reporting patterns of 78 of the largest Spanish companies between 2001 and 2003 examines the extent of their compliance with the ICAC-2002 standard, which obliged them to make environmental disclosures in their financial statements. The results suggest that progressive and improved regulation could increase the volume and quality of SEER disclosures. They also suggest, however, that persistent non-compliance means that the problems associated with voluntary disclosure still exist. Finally, through an impression management perspective, the study reveals, the diverse strategies, ranging from dismissal to concealment, that are employed by companies to avoid transparency. As regulation improves and enforcement expectations rise, it becomes more difficult to dismiss compulsory reporting norms. As a result, some firms engage in more complex concealment strategies to attain corporate legitimacy, depriving stakeholders of regulatory information. The latter point serves to reconcile apparently contradictory explanations in the literature as to whether legitimacy theory might explain partial compliance with SEER regulation.