Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T22:25:46Z No. of bitstreams: 1 RafaeleSabrinaBarbosaPereira_DISSERT.pdf: 5752486 bytes, checksum: 0bf019e2a266290708f317664b44e04e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-24T00:14:46Z (GMT) No. of bitstreams: 1 RafaeleSabrinaBarbosaPereira_DISSERT.pdf: 5752486 bytes, checksum: 0bf019e2a266290708f317664b44e04e (MD5) / Made available in DSpace on 2017-03-24T00:14:46Z (GMT). No. of bitstreams: 1 RafaeleSabrinaBarbosaPereira_DISSERT.pdf: 5752486 bytes, checksum: 0bf019e2a266290708f317664b44e04e (MD5) Previous issue date: 2015-09-01 / Cometas, planetas, luas e constela??es foram, ao longo de civiliza??es, representados por pintores, arquitetos e escultores por meio de imagens e mapas celestes e mapas zodiacais. Na cultura renascentista, essas imagens estiveram, por exemplo, nas ab?bodas do pal?cio de Schifanoia em Ferrara, tal como em diversas gravuras de Albrecht D?rer, como apontou Aby Warburg e, posteriormente, Erwin Panofsky. Nessa escrita, apontamos que as gravuras, a saber, O sifil?tico (1494), O astr?nomo (1500) e A mulher com zod?aco (1502), Melencolia I (1514), atribu?das a D?rer, poderiam fazer parte de temas, especialmente, da astrologia, recorrentes em outras gravuras de seu per?odo. Para isso, partiremos da rela??o entre imagem e texto presente nas imagens elencadas, de acordo com a perspectiva de W.J.T. Mitchell. Assim, visamos entender como as imagens podem, atrav?s de sua visualidade, ajudar a compor um per?odo em que o pensamento era concebido por determinadas correspond?ncias entre o homem e os astros, a partir da ideia do homem como um microcosmo. Assim sendo, para entender essa dada forma de se organizar atrav?s de um espa?o correspondente, ou atrav?s de uma vis?o de mundo, no qual os astros tinham lugar especifico, apontamos para a categoria espa?o m?tico tal qual apontada segundo a perspectiva do ge?grafo Yi-Fu Tuan. / Comets, planets, moons and constellations, were throughout civilizations, represented by painters, architects and sculptors through pictures, celestial maps and zodiacal maps. In Renaissance culture these images were, for instance, in the vaults of the Schifanoia Palace in Ferrara, as well as in several prints by Albrecht D?rer as pointed by Aby Warburg and later, Erwin Panofsky. In this writing, we point out that the pictures, namely, The Syphilitic (1494), Astronomer (1500) and The Woman with Zodiac (1502), Melencolia I (1514) attributed to D?rer could be part of subjects, especially, astrology, recurring in other prints in hisage. In order to develop this idea, we start from the relationship between picture and text present in the listed images, according to the perspective of WJT Mitchell. Thus, we aim to understand how pictures can through their visuality helped the composing of a time when the thought was conceived by certain correspondences between man and the stars, from the idea of mankind as a microcosm. Therefore, to understand this given way to organize life through a corresponding space or through a worldview in which the stars had a specific place, we point to the category mythical space as it is presented in the geographer Yi-Fu Tuan?s perspective.

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Made available in DSpace on 2014-12-17T14:55:05Z (GMT). No. of bitstreams: 1 RobsonHCM_TESE.pdf: 3686861 bytes, checksum: 9b78889548f4f5129d82c1a9c438aec4 (MD5) Previous issue date: 2012-06-18 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / This work presents the development of new microwaves structures, filters and high gain antenna, through the cascading of frequency selective surfaces, which uses fractals D?rer and Minkowski patches as elements, addition of an element obtained from the combination of the other two simple the cross dipole and the square spiral. Frequency selective surfaces (FSS) includes a large area of Telecommunications and have been widely used due to its low cost, low weight and ability to integrate with others microwaves circuits. They re especially important in several applications, such as airplane, antennas systems, radomes, rockets, missiles, etc. FSS applications in high frequency ranges have been investigated, as well as applications of cascading structures or multi-layer, and active FSS. In this work, we present results for simulated and measured transmission characteristics of cascaded structures (multilayer), aiming to investigate the behavior of the operation in terms of bandwidth, one of the major problems presented by frequency selective surfaces. Comparisons are made with simulated results, obtained using commercial software such as Ansoft DesignerTM v3 and measured results in the laboratory. Finally, some suggestions are presented for future works on this subject / Este trabalho apresenta o desenvolvimento de novas estruturas de micro-ondas, filtros multi-banda ou banda larga, atrav?s do cascateamento de superf?cies seletivas em frequ?ncia, que usa patches fractais de D?rer pentagonal e Minkowski como elementos, al?m de um elemento obtido a partir da combina??o de outros dois mais simples que s?o o dipolo em cruz e a espira quadrada. Superf?cies seletivas em frequ?ncia (FSS) abrangem uma grande ?rea das Telecomunica??es e t?m sido largamente utilizadas devido a seu baixo custo, peso reduzido e possibilidade de se integrar com outros circuitos de micro-ondas. Elas s?o especialmente importantes em diversas aplica??es, como avi?es, sistemas de antenas, radomes, foguetes, m?sseis, etc. Aplica??es de FSS em faixas de frequ?ncia elevadas t?m sido investigadas, assim como aplica??es destas estruturas em cascata ou multicamadas, FSS ativas. Nesse trabalho, s?o apresentados resultados simulados e medidos para as caracter?sticas de transmiss?o de estruturas cascateadas (multicamadas), com intuito de investigar o comportamento do funcionamento em termos de largura de banda, um dos grandes problemas apresentados por superf?cies seletivas em frequ?ncia. S?o feitas compara??es entre resultados simulados, obtidos utilizando software comercial como Ansoft DesignerTM v3 e resultados medidos em laborat?rio. S?o apresentadas, ainda, sugest?es de continuidade do trabalho