999 resultados para Conceitos complexos


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The railroad, from 1870 and on, becomes an usual complaining in the press s and politician elite s speeches, especially because of Natal s geographic isolation. The implantation of two railroads in the capital territory Estrada de Ferro de Natal a Nova Cruz, afterwards part of Great Western Railway Company network, and Estrada de Ferro Central do Rio Grande do Norte had serious implications in the urban environment. While railroad s structures were already consolidated, other transportation mechanisms were being implanted in the first decades of the 20th century, such as trams lines, which, by the way, was a transport modal that also used rails as a dislocation meaning. Considering these questions, we may ask: how come railroads and tramways demands, roads and buildings had influenced the internal organization of Natal? We work with the general hypothesis that the influence of technical networks, composed by tramways and railroads, over Natal s urban space happened in a diversified way, sometimes consolidating social aspects in certain areas, sometimes improving the occupation of others. The impact over the city s territory also happens in a diversified way between the buildings/railroad s complexes and the pathways. The different scale of the train in comparison to the trams velocity, size, noise level, flow, among others is also a cause to the different consequences in urban environment. The main objective of this work is to understand the role of circulation technical networks in the construction process of urban space in Natal, as a way to contribute to the urban historiography about the subject. The time frame adopted, between 1881 and 1937, marks the time path of railroads and tramways in Rio Grande do Norte: 1881 is the year of railroad s first section inauguration from Natal to São José do Mipibu as well of the railroad complex in the Republic Square in Natal; the year of 1937 marks the beginning of tramways declination process in the city. At this time railroads and tramways had to face more intensively the competition of motor vehicles. The theory reference adopted is based on concepts and analysis of authors, such as Flávio Villaça and Roberto Lobato Corrêa references to the concepts of urban structure , localization and accessibility and Gabriel Dupuy to explain the concept of urban technical networks . These references reveal the conflict of different realities in the urban universe interests and values which is an important factor about the construction of urban space. The information sources used were from two distinctive natures: primary, journals of the time studied and official government reports, and secondary, based on other works about the subject. It was also used by this study iconographic source, especially images from the data base of the research group História da Cidade, do Território e do Urbanismo .

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Dissertação para obtenção do grau de Mestre em Arquitetura, apresentada na Universidade de Lisboa - Faculdade de Arquitetura.

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Dissertação (mestrado)—Universidade de Brasília, Instituto de Química, Programa de Pós-Graduação em Química, 2015.

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Dissertação de mest. em Biotecnologia, Departamento de Química e Bioquímica da Faculdade de Ciêicias e Tecnologia, Univ. do Algarve, 2004

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Recent studies are investigating a new class of inorganic materials which arise as a promising option for high performance applications in the field of photoluminescence. Highlight for rare earth (TR +3 ) doped, which have a high luminous efficiency, long decay time and being able to emit radiation in the visible range, specific to each element. In this study, we synthesized ZrO2: Tb +3 , Eu +3 , Tm +3 nanoparticles complex polymerization method (CPM). We investigated the influences caused by the heat treatment temperature and the content of dopants in zirconia photoluminescent behavior. The particles were calcined at temperature of 400, 500 and 600 ° C for two hours and ranged in concentration of dopants 1, 2, 4 and 8 mol% TR +3 . The samples were characterized by thermal analysis, X-ray diffraction, photoluminescence of measurements and uv-visible of spectroscopies. The results of X-ray diffraction confirmed the formation of the tetragonal and cubic phases in accordance with the content of dopants. The photoluminescence spectra show emission in the region corresponding simultaneous to blue (450 nm), green (550 nm) and red (615 nm). According to the results, ZrO2 particles co-doped with rare earth ions is a promising material white emission with a potential application in the field of photoluminescence

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the nourishing industry is a segment that makes use of high water consumption due to necessity of the hygienic cleaning of the establishments and the maintenance of the good quality of the food. It enters the nourishing industries with bigger water consumption we have the fishery industry which generates effluent around 5.4 m(3). t(-1) of processed fish. This work had as objective the reduction in the water consumption of the processing of Nile tilapia through the implantation of P+L techniques, for had been in such a way carried through hydraulical alterations in the filleting tables aiming at the minimum possible water consumption for two methods of filleting, eviscerated and not eviscerated, as well as the comment of the alterations in the generated quality of the effluent one. In the present study, the reduction in the water consumption in the filleting process corresponded 98.16% for method EV considering an average time of processing of 3 hours for 32.99 kg of fish, and for method NEV the reduction was of 97.97% with average time of processing of 2.1 hours for 34.96 kg of fish, thus demonstrating that the P+L techniques are efficient for the reduction of the water consumption.

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The present study provides a methodology that gives a predictive character the computer simulations based on detailed models of the geometry of a porous medium. We using the software FLUENT to investigate the flow of a viscous Newtonian fluid through a random fractal medium which simplifies a two-dimensional disordered porous medium representing a petroleum reservoir. This fractal model is formed by obstacles of various sizes, whose size distribution function follows a power law where exponent is defined as the fractal dimension of fractionation Dff of the model characterizing the process of fragmentation these obstacles. They are randomly disposed in a rectangular channel. The modeling process incorporates modern concepts, scaling laws, to analyze the influence of heterogeneity found in the fields of the porosity and of the permeability in such a way as to characterize the medium in terms of their fractal properties. This procedure allows numerically analyze the measurements of permeability k and the drag coefficient Cd proposed relationships, like power law, for these properties on various modeling schemes. The purpose of this research is to study the variability provided by these heterogeneities where the velocity field and other details of viscous fluid dynamics are obtained by solving numerically the continuity and Navier-Stokes equations at pore level and observe how the fractal dimension of fractionation of the model can affect their hydrodynamic properties. This study were considered two classes of models, models with constant porosity, MPC, and models with varying porosity, MPV. The results have allowed us to find numerical relationship between the permeability, drag coefficient and the fractal dimension of fractionation of the medium. Based on these numerical results we have proposed scaling relations and algebraic expressions involving the relevant parameters of the phenomenon. In this study analytical equations were determined for Dff depending on the geometrical parameters of the models. We also found a relation between the permeability and the drag coefficient which is inversely proportional to one another. As for the difference in behavior it is most striking in the classes of models MPV. That is, the fact that the porosity vary in these models is an additional factor that plays a significant role in flow analysis. Finally, the results proved satisfactory and consistent, which demonstrates the effectiveness of the referred methodology for all applications analyzed in this study.

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Comunicação apresentada ao 1º Encontro Nacional de Didácticas e Metodologias de Ensino / CIFOP - U. Aveiro, Fevereiro de 1988

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Introdução O tratamento das feridas agudas e crónicas mudou significativamente nos últimos vinte anos e centra-se em recomendações baseadas na evidência e no desenvolvimento de novas tecnologias. Pelo seu impacto no indivíduo e económico, a comunidade científica tem investido nesta temática. Objetivos Definir ferida aguda e crónica; Expor fatores que influenciam a cicatrização e determinam a cronicidade da ferida; Estabelecer as diferenças no tratamento de feridas agudas e crónicas. Questão de Investigação Quais as diferenças no tratamento de feridas agudas e crónicas? Metodologia Revisão da literatura nas bases de dados ESBCO, SciELO, PubMed com as palavras-chave "ferida aguda" e "ferida crónica" e utilizou-se um manual sobre a temática. Resultados Processo de cicatrização normal Evolução até 14 dias após trauma ou intervenção cirúrgica; Ferida crónica intervencionada. Processo de cicatrização prolongado Evolução superior a 3 semanas/tratamento superior a 6 semanas; Desvio do processo cicatricial fisiológico. Discussão/Conclusão A cicatrização ocorre através de processos bioquímicos específicos, independentemente da etiologia ou tempo de evolução da ferida. Existem fatores que influenciam esse mecanismo e são responsáveis pela evolução crónica da ferida. Os estudos considerados apontam para o surgimento de novas tecnologias no tratamento de feridas crónicas. No entanto, os fundamentos da intervenção em feridas são transversais. O enfermeiro tem um papel preponderante no tratamento da pessoa com ferida, devendo estar desperto para todos os fatores responsáveis pela sua cronicidade.

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A temática proposta como objeto de estudo na presente tese, é o resultado de uma investigação dedicada ao fenómeno de utilização da imaginária processional nos cortejos de penitência de pendor franciscano, nos séculos XVII a XX na ilha de S. Miguel, Açores. Este tipo de manifestações religiosas, particularmente característico no espaço Iberoamericano, evidencia-se pela originalidade cenográfica, na qual são utilizados vestuário e adereços cénicos como complementos dos respetivos conjuntos escultóricos, as denominadas imagens de vestir. No arquipélago dos Açores, a Venerável Ordem Terceira da Penitência teve um papel de grande importância na organização destes eventos processionais, sendo que as ilhas de S. Miguel e da Terceira representam atualmente um dos últimos redutos na organização de procissões penitenciais, com recurso à utilização de imagens de vestir. No caso especifíco de S. Miguel, este tipo de imaginária pode ser ainda observada nos acervos de algumas das antigas igrejas conventuais da Ordem dos Frades Menores existentes nesta ilha, bem como na única procissão oriunda do espírito penitencial da Ordem Terceira, que se realiza anualmente na cidade da Ribeira Grande. O estudo agora apresentado pretende compreender as diversas componentes da utilização deste tipo de imaginária, bem como o registo do legado patrimonial que os seculares franciscanos perpetuaram até à atualidade, materializado num processo de patrimonialização das suas imagens de vestir, expresso na dicotomia entre os objetos, enquanto matéria, e as suas realidades biográficas, ligadas às comunidades de Terceiros que estiveram por detrás do uso destas imagens processionais; ABSTRACT: Religious sculptures for dressing of the Third Procession: history, concepts, typologies and traditions - A Franciscan heritage legacy in the island of S. Miguel, Azores, between the 17th and 19th centuries. The theme proposed as object of study in this thesis is the result of a research dedicated to the custom of adorning religious sculptures and displaying them in Franciscan penitential processions between the seventeenth and twentieth centuries, in the island of S. Miguel, Azores. This type of religious expression, particularly characteristic in the Ibero-American space, featuring up by scenic originality, in which clothing and scenic props are used to complement the respective sculptural groups, called religious sculptures for dressing. In the Azores, the Venerable Third Order of Penance had a major role in organizing these processional events, and the islands of S. Miguel and Terceira currently represents one of the last holdouts in organizing penitential processions, with the use of religious sculptures for dressing. In the case of S. Miguel, this type of imaginary can still be seen in the collections of some of the ancient Order of the convent churches of the Friars Minor existing on this island, and the only procession coming from the penitential spirit of the Third Order, which is held annually in the city of Ribeira Grande. The study now being presented aims to understand the various components of the use of such imaginary, and the recording of heritage legacy that the Franciscan secular perpetuated to the present day, materialized in a patrimonialization process of their dress images, expressed in the dichotomy between objects, as matter, and their biographical realities, linked to third-party communities that were behind the use of these processional images.

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O cancro é a segunda causa de mortalidade a nível mundial. Um dos problemas nos tratamentos atuais de quimioterapia relaciona-se com os efeitos secundários causados pela falta de seletividade dos fármacos utilizados. Assim, um dos desafios atuais é o desenvolvimento de sistemas terapêuticos que permitam potenciar o efeito dos fármacos e diminuir os seus efeitos nocivos. Neste contexto, neste trabalho, foram sintetizados complexos de Fe, Co e Zn com fórmula geral [M(bipy-R)3]x+, a partir dos quais foi possível obter sistemas micelares formados in situ pela adição de um copolímero de PLA-b-PEG ou por introdução de macroligandos poliméricos anfifílicos. Os resultados mostram que as nanopartículas formadas apresentam tamanho e características adequadas para aplicações na terapia dirigida contra o cancro. Os resultados preliminares de citotoxicidade na linha tumoral humana da mama MDAMB231 indicam que todos os compostos estudados apresentam atividade citotóxica relevante, sendo os compostos micelares os mais promissores; Abstract: New micellar transition metals complexes for targeted therapy of cancer Cancer is the second leading cause of mortality worldwide. One problem in the current chemotherapy treatments is related to the severe side effects caused by the lack of selectivity of the drugs in clinical use. Thus, one of the current challenges is the development of new therapeutic systems that allow maximizing the effect of the drugs and reducing their harmful effects. In this context, several Fe, Co and Zn compounds of the general formula [M (bipy-R)3]x+ were synthesized in order to obtain micellar systems, either by in situ addition of a PLA-b-PEG copolymer or by introducing amphiphilic macroligands. The results show that the formed nanoparticles have size and characteristics suitable for applications in targeted therapy against cancer. Preliminary results of cytotoxicity in human breast cancer line MDAMB231 indicate that all the studied compounds show significant cytotoxic activity, being the micellar compounds the most promising agents.

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Abordagem enquadrada nos estudos sobre o futuro, a prospetiva é, hoje, uma poderosa ferramenta na área do planeamento, pela possibilidade que oferece na promoção e planificação da mudança cultural, ou seja, como auxílio à construção do futuro (Berger, 1957; De Jouvenel, 2000; Godet, 1993; Perestrelo, 2000; Porter, 1989; Davis, 1998; Van Der Heijden, 2000). Este capítulo aborda aspetos relativos à génese e fundamentos, conceitos, vantagens, limites e interesse da prospetiva para as ciências sociais.

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Este artigo tem como objetivo inserir a proposta de organização da agricultura baseada nos conceitos da Integração Lavoura-Pecuária-Floresta (ILPF) no âmbito das discussões relacionadas à necessidade de transformação do modelo produtivo vigente. Foram utilizadas as diretrizes e os conceitos relacionados com a Green Economy Initiative (GEI), uma iniciativa do Programa das Nações Unidas para o Meio Ambiente (Pnuma). Busca-se mostrar que a proposta ILPF está alinhada com os aspectos de agricultura sustentável proposta na GEI, e que a ILPF se coloca como uma importante estratégia de aumento da produção agropecuária de forma sustentável para o Brasil. A adoção da GEI é uma estratégia consistente para a implementação de políticas com a finalidade de promover o desenvolvimento sustentável. Dessa forma, a produção agrícola baseada no modelo ILPF alinha-se perfeitamente com as premissas da GEI no que tange à promoção e incentivos a modelos de agricultura de baixo carbono.