992 resultados para Martínez, Martín.
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La tesis investiga los imaginarios de la sierra y de sus habitantes a través de la fotografía de Sebastián Rodríguez (Huancayo, 1896-Morococha, 1968) y Martín Chambi (Puno, 1891-Cusco, 1973). Así, la relación entre representación y poder toma centralidad en el trabajo y dialoga con la elaboración de heterogeneidad histórico estructural, con el objetivo de visibilizar las formas como adquiere concreción el poder y su manifestación en las representaciones sobre la Sierra y sus habitantes en espacios sociales diferenciados, como son Morococha, Junín, en la Sierra Centro, y Cusco, Cusco, en la Sierra Sur. El análisis semiótico de las fotografías parte de un nivel descriptivo para adentrarnos progresivamente en lo denotativo de las imágenes. En el transito de uno al otro identificamos tres elementos o niveles de análisis en cada fotografía: el índice, el ícono y el símbolo. En este proceso, la propuesta del Grupo µ (2002) sobre la retórica visual permite identificar los elementos retóricos que desplazan el signo inicial a otro diferente, de índole denotativo, sobre la Sierra y sus habitantes. En el caso de la Sierra como lugar, hay una apropiación de la disciplina geográfica que organiza la composición de las tomas. En el caso de sus habitantes, existe poca similitud entre los casos de Cusco y Morococha: comparten ciertos elementos o criterios (raza, clase, género, edad) que organizan las fotos; sin embargo, de acuerdo a la especificidad histórica de la Sierra Sur y la Sierra Centro, adquieren una articulación propia. Por tanto, la relación entre representación y poder refleja la ausencia de una matriz constitutiva única, y, en su lugar, expone la presencia de un patrón, es decir, una densa malla que atraviesa las diferentes relaciones sociales, dándoles particularidad sin perder su articulación en una unidad analítica.
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This study aims to examine the contemporary viewer and also propose a review of the literature surrounding the spanish researcher Jésus Martín-Barbero. The proposed review, based on Martín-Barbero observations and the Latin American Cultural Studies analysis, observes the individual as part of the processes of communication and research on the concept of cultural mediation, the viewer as component/agent/object of the production of meaning. The study will perceive it as an element of inaccuracy/inadequacy and understand it as a subject of these reactive processes that contain complex and involve communication and culture, in contrast the impressions that resulted from a discussion between a television professional and a communication researcher and of these findings on the same viewer. The work also aims to point the viewer as a component of the possible mapping desired by Martín-Barbero to massive contemporary interpretation of the processes and its concept of night map
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O presente artigo trata da concepção de processo grupal e poder social enfocada por Martín-Baró.¹ O autor retoma a concepção de grupo presente no trabalho de Sílvia Lane, quando considera os aspectos pessoais, as características grupais, a vivência subjetiva e realidade objetiva e o caráter histórico do grupo. Na perspectiva da psicologia social, segundo o autor, é muito mais relevante a análise do papel do poder na vida cotidiana, no dia-a-dia das pessoas, do que se centrar nos acontecimentos excepcionais e não rotineiros. Considerando que grande parte da prática profissional do psicólogo, principalmente numa perspectiva psicossocial, envolve o trabalho com grupos, a abordagem da questão do poder passa a ter papel fundamental. Neste sentido, o contato com a produção de Martín-Baró é essencial e pode contribuir incisivamente no nosso trabalho cotidiano.
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SAFT techniques are based on the sequential activation, in emission and reception, of the array elements and the post-processing of all the received signals to compose the image. Thus, the image generation can be divided into two stages: (1) the excitation and acquisition stage, where the signals received by each element or group of elements are stored; and (2) the beamforming stage, where the signals are combined together to obtain the image pixels. The use of Graphics Processing Units (GPUs), which are programmable devices with a high level of parallelism, can accelerate the computations of the beamforming process, that usually includes different functions such as dynamic focusing, band-pass filtering, spatial filtering or envelope detection. This work shows that using GPU technology can accelerate, in more than one order of magnitude with respect to CPU implementations, the beamforming and post-processing algorithms in SAFT imaging. ©2009 IEEE.
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This work presents a method to obtain B-scan images based on linear array scanning and 2R-SAFT. Using this technique some advantages are obtained: the ultrasonic system is very simple; it avoids the grating lobes formation, characteristic in conventional SAFT; and subaperture size and focussing lens (to compensate emission-reception) can be adapted dynamically to every image point. The proposed method has been experimentally tested in the inspection of CFRP samples. © 2010 American Institute of Physics.
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In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a polarity function and a threshold criterium are used to develop an image compounding technique. The spatial diversity is increased using an additional array, which generates complementary information about the defects, improving the results of the proposed algorithm and producing high resolution and contrast images. The inspection of isotropic plate-like structures using linear arrays and Lamb waves is presented. Experimental results are shown for a 1-mm-thick isotropic aluminum plate with artificial defects using linear arrays formed by 30 piezoelectric elements, with the low dispersion symmetric mode S0 at the frequency of 330 kHz. © 2011 American Institute of Physics.
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Incluye Bibliografía
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Inauguración oficial del Director Regional del UNICEF del Simposio en el cual alude al objetivo de éste, que es definir qué es el desarrollo social, cuáles son sus fines y sus relaciones con lo económico y con los regímenes políticos y, sobre todo, cuáles son sus medios para aumetnar el bienestar humano.
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Documento Informativo
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Presentaciones de Alicia Bárcena y Christof Kersting.