1000 resultados para Interferometria de luz branca


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Neste artigo, apresentaremos um estudo da tradução da obra Inferno da autora Patrícia Melo, com o título Inferno, por Clifford Landers. Buscamos refletir sobre como são projetados no exterior uma visão da realidade violenta de grandes centros urbanos brasileiros e sobre o quanto o tradutor conseguiu resgatar da nossa sociedade no texto traduzido. Partimos do pressuposto de que o tradutor, consciente ou inconscientemente, usa recursos durante o processo de mediação entre o texto de partida e o texto de chegada, que tornam a leitura da obra traduzida mais fácil. Baker (1996) propõe a investigação de tipos de comportamento linguístico característicos de textos traduzidos. O objetivo desse trabalho é identificar aspectos de normalização presentes na tradução. Para a investigação, recorremos aos Estudos da Tradução Baseados em Corpus (Baker, 1993, 1996; Camargo, 2005, 2007), à Linguística de Corpus (Berber Sardinha, 2004) e aos estudos sobre normalização de Scott (1998). Pode-se observar a ocorrência de mudança de registro de linguagem, omissões, adições, diferenças no comprimento das sentenças e relacionadas a imprecisões de expressões. Espera-se que o presente trabalho possa contribuir para uma maior conscientização das tendências apresentadas pelos tradutores, e para apresentar as possibilidades oferecidas pela intersecção dos Estudos da Tradução Baseados em Corpus e da Linguística de Corpus.

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In the current context of lexicographical studies, there have been increasing discussions concerning the issue of the relationship between theoretical knowledge of the lexicon and pedagogical practices involved in its teaching. However, in this context, the special lexicon of Portuguese such as neologisms, foreign words, slang and idioms has received little attention from researchers. There are many theoretical studies on each one of these phenomena, but few studies aim at an organization and inclusion of special units in the teaching of Portuguese. For this reason, this article presents a reflection on the teaching of idioms, and, despite the widely held belief that dictionaries are only needed for the teaching of foreign languages, the article suggests the implementation of special dictionaries for the teaching of Portuguese Language in elementary education.

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This paper is result of an analysis of the Brave New World by Aldous Huxley, made based on the perspective of discursive semiotics. For both, the elements of the generative course of meaning were applied, particularly those in works of Barros (2001) and Fiorin (2000). In view of that each of the three levels (elementary, narrative and discourse) of semiotics approach are considered capable of independent descriptions, we sought through the (re) construction of meaning of specific parts of the work and also the relationship of its thematic route with the time it was composed, found that, as a result of this work, the relationships between fiction and reality and thus the relevance of the work of Aldous Huxley

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There are cassava varieties that present compounds as carotenoids, beta-carotene, lycopene and minerals important for human and animal health. The present study evaluated the antioxidant activity of the white, yellow and pinkish varieties of Manihot esculenta, by mean of the DPPH test and by the ferrous ion-chelating activity. Furthermore, the total phenols, carotenoids, beta-carotene, lycopene and zinc contents were also determined. Utilizing the DPPH test it was possible to find that extracts of boiled samples presented higher antioxidant activity (89.53% - pinkish) in comparison to the fresh samples (1.97% - white). For the ferrous ion-chelating test, the highest activity was found for the boiled pinkish variety extract (63.43%) and the lowest was for fresh yellow extract (17.34%) the white sample did not present activity. The highest concentration of total phenols and zinc content was obtained for the boiled pinkish variety extract 136.12 mg EAG/g of extract and 0,811ppm, respectively, in the concentration of 1000 µg/mL. The pinkish variety presented also higher quantity of pigments, including carotenoid (29.40 µg/g), beta-carotene (9.14 µg/100g) and lycopene (68.92%). According to the results obtained in this study it was possible to conclude that the yellow and pinkish varieties of M. esculenta present quantity of phenolic compounds and minerals sufficient to attribute the antioxidant activity and may thus contribute to reduce oxidative damage and be used as nutraceuticals or directly ingested in the diet to maintain good health.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Filosofia - FFC

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Action-research conducted in a a Brazilian public elementary school. Using the tools provided by Meirieu, the point was to offer teachers the possibility of improving their perception of their own knowledge and practice. The process consisted in filming classes and watching the films together for reflexive interaction. When given the chance to look at themselves, their practice and their students, the teachers started to do build a new perspective of the learning process and to deconstruct certain truths regarding their interventions, which brought in new outlooks, new discourse and new practices.

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Este trabalho pretende investigar a eficiência do Programa “Luz para Todos” - LPT, na alocação de recursos financeiros para os estados mais carentes da nação. Para tanto, utiliza-se o ferramental da Análise Exploratória de Dados Espaciais (AEDE). Inicialmente, elabora-se uma análise univariada para o PIB estadual per capita, verificando-se dois clusters significativos para essa variável: um, com valores elevados e outro, com valores reduzidos. Em seguida, utiliza-se a mesma metodologia para avaliar os recursos alocados pelo Programa LPT, detectando-se os estados com valores significativos para essa variável. Por fim, é realizada uma análise bivariada confrontando a renda per capita estadual contra os recursos alocados pelo Programa LPT em cada estado. Os resultados sugerem que o Programa LPT cumpre parcialmente sua função social, pois dois estados “ricos”, Minas Gerais e Goiás, possuem como vizinhos, estados que receberam quantias abaixo da média do referido Programa.

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This study evaluated in vitro the shear bond strength of brackets bonded with xenon plasma arc light, light-emitting diode (LED) and conventional halogen light using different curing times. Brackets were bonded to the buccal surface of 60 human maxillary premolars allocated to five groups. In groups 1 and 2, the resin was cured with the plasma arc for three and six seconds (s), respectively; in groups 3 and 4, the LED was used for five and ten s, respectively; and in group 5, the halogen light was used for 40 s. The specimens were stored in water for 24 hours and subjected to a shear force until bracket failure. The debonding pattern was classified according to the adhesive remnant index (ARI). The results were assessed by Anova and the SNK post-hoc test. No differences were detected among groups 2, 4 and 5, which showed higher averages than groups 1 and 3, which were not different between themselves. The ARI scores showed no differences among the three types of light sources in all times tested. Plasma arc and LED lights can be used with shorter curing times, within certain limits, than conventional halogen light for bonding orthodontic brackets, without decreasing bond strength.

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This study assessed the surface microhardness of compound resins cured by different light sources. Methods Three micro hybrid (Vit-l-escence, Amelogen Plus, Opallis) and one nanoparticle (Filtek Z350, 3M ESPETM Dental Products, St. Paul, USA) compound resins were selected. The resins were polymerized by a halogen light unit (Ultralux, Dabi Atlante, Ribeirão Preto, Brasil) with two tips, one semi-guided made of glass and another of painted acrylic and a LED-based source (UltraLume 2, Ultradent®, South Jordan, USA). Specimens constructed from a circular aluminum matrix were photopolymerized for 40 second after they received the compound resin and stored dry for 24 hours. After this period, a Vickers surface microhardness assay was performed, measuring the top (hardness 1) and base (hardness 2) surfaces four times each. Variance analyses were complemented by Newman-Keuls method, with significance set at 5%. Results The Opallis (FGM, Santa Catarina, Brasil) resin subjected to UltraLume 2 (Ultradent®, South Jordan, USA) obtained the lowest mean hardness values for the top surface. The Vit-l-escence (Ultradent®, South Jordan, USA) compound cured by Led UltraLume 2 (Ultradent®, South Jordan, USA) and by Ultralux PCP (Dabi Atlante, Ribeirão Preto, Brasil) halogen light obtained the highest mean hardness, followed by the Filtek Z350 (3M ESPETM Dental Products, St. Paul, USA) resin subjected to UltraLume 2 (Ultradent® South Jordan, USA). The Opallis (FGM, Santa Catarina, Brasil) resin cured by LED UltraLume 2 (Ultradent®, South Jordan, USA) also obtained the lowest mean hardness for the base surface and the Vit-L-Escence (Ultradent®, South Jordan, USA) resin obtained the highest value, followed by Amelogen Plus, when cured by Ultralux (Dabi Atlante, Ribeirão Preto, Brasil) using the semi-guided tip. Conclusion The polymerization and, consequently, the microhardness achieved by the LED unit was equivalent to those achieved by conventional halogen units for three of the four composites tested.

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The purpose of this study was to use a fluorescent dye and CLSM microscope to observe the effect of different light intensities on dentin tensile bond strength. Flat dentin surfaces were created on 16 intact human third molars and divided in 4 groups: Group G1 - halogen - KM -200R®; Group G2 - LED - Ultraled®; Group G3 - LED - UltraLume LED5® and Group G4 - LED - Biolux Single V®. For all the groups, the restoration procedure used Single Bond® adhesive, mixed with rodamin B and InTen-S® composite resin. Then, they were cut on serial sections to obtain 1 mm2 area and submitted to micro tensile test and after words, the fractures were analyzed with a digital microscope and CLSM. The statistical analysis showed that all in all groups, except Group G2, which had a significant smaller tensile bond strength ratio. The fracture mode analysis showed that there were significant differences when comparing groups G1 / G2, and G2 / G4. There is no evidence of relevant differences among the other groups. With these results, we conclude that the use of fluorescent dye and CLSM demonstrated to be a simple and nondestructive technique, and that there are evidences that light intensities influenced the dentine tensile.

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Ao atender um paciente, muitas vezes o profissional da saúde fotografa ou filma o caso. Há, via de regra, duas razões básicas para tal atitude. A primeira é para a documentação do caso per se, e as imagens ficarão restritas ao prontuário clínico do paciente. E, se porventura algum dia houver um litígio envolvendo aquele determinado tratamento, tais imagens poderão ser utilizadas como meio de prova. A segunda razão diz respeito à divulgação do caso clínico, com a sua publicação em periódicos científicos, apresentação em aulas, cursos, congressos e similares. Pode-se citar ainda uma outra razão: o uso das imagens para a divulgação dos serviços do profissional que conduziu o tratamento/procedimento. Para a obtenção/gravação das imagens, faz-se necessário o consentimento do paciente, ou de seu responsável legal (no caso de incapaz). Porém, a imagem produzida somente poderá ser utilizada para os fins específicos a que se destinou inicialmente. Se porventura o profissional tiver intenção de usá-la, por exemplo, em publicações, precisará do consentimento específico para este fim. Vale lembrar que a própria Constituição Federal da Brasil assegura tal direito. A produção de imagens de pessoas e a sua divulgação em meios acadêmicos, por exemplo, ocorre não somente em atendimentos clínicos, como também em pesquisas que envolvam seres humanos. É necessário respeitar as normas éticas e legais relacionadas ao uso de imagens. Este trabalho apresenta uma proposta de Termo de Consentimento para obtenção e uso de imagens de pacientes de profissionais da saúde.

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By understanding the reader as a central link to the meaning of the literary text and with the opportunity to extend the relevance of such studies, this work aims at analyzing the short story A benfazeja, by João Guimarães Rosa, with subsidies from Aesthetic Response Theory, by Wolfgang Iser. It investigates how structures of the text conduct the reading, in a subversive manner, by technique, repertory of themes, allusions, inversions of expectations, determinations and “gaps”. It verifies that there is an allegorical court with a persuasive rhetoric, in which the defense lawyer not only intends to protagonist MulaMarmela’s absolution, but also an invitation to new ways to see and judge to implied reader, beyond obvious reason and prejudice.