1000 resultados para Misturador estático


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Tem-se como objetivo mostrar um dos aspectos da concepção de literatura brasileira desenvolvida por Antonio Candido em um conjunto de textos publicados entre 1953/5 e 1997. Dentre os três aspectos possíveis – os outros dois são o ritmo histórico e social e o sistema literário – o escolhido foi o ritmo estético, regido pela dialética do local e do cosmopolita, que, para o autor, funcionaria como “lei de evolução da nossa vida espiritual”– “se fosse possível estabelecer uma” (CANDIDO, 1965, p.131) –, presente, de modo decisivo, nas formas de expressão de nossa literatura, em cujo processo histórico se manifesta de modo diverso nas várias etapas do longo percurso que vai da dependência do período colonial até a integração na interdependência cultural de nosso tempo. O autor constrói sua concepção de literatura brasileira em tensão com a noção nacionalista de literatura do Brasil, que, de origem romântica, prossegue no Naturalismo e Modernismo, atingindo tempos ulteriores. Complementam a exposição algumas considerações sobre o processo de difusão e recepção das obras que propagam suas idéias, expressões de sua visão de mundo, “fiel à tradição do humanismo ocidental”(CANDIDO, 2008, p.11).

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This study aimed to compare the effect of three stretching techniques (ballistic, static and contract-relax) on instant gain muscle flexibility on the hamstring muscle. We evaluated 23 subjects of both gender [means (SD) age 21.17 (1.4) years]. All volunteers performed static, ballistic and contract-relax stretching. Each technique was performed in a single session with an interval of seven days between sessions. To assess the immediate effects of the different techniques were performed two tests of flexibility, Sit and Reach Test and the Popliteal Angle Test. In comparison with the baseline there were significant increase in muscle flexibility in the Popliteal Angle Test after application ballistic (6.26%) and contract-relax technique (6.5%) respectively (p<0.05). When comparing the three techniques regarding the change score significant difference was found in the the Popliteal Angle Test for ballistic and contract-relax stretching, but Sit and Reach Test showed no significance difference. These data suggest that the ballistic and contract-relax were better than the technique of static stretching and both are equally effective. The ballistic contract-relax stretching techniques improved gain of muscle flexibility on the hamstring muscle.

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Durante o processo de envelhecimento ocorrem alterações morfofisiológicas que podem acarretar em dificuldades na realização de atividades da vida diária (AVDs), diminuindo conseqüentemente a independência do idoso e comprometendo sua qualidade de vida. Para atenuar e/ou retardar tais alterações, diversos autores têm recomendado a prática regular de atividade física voltada para o desenvolvimento dos componentes de capacidade funcional (CF). Especificamente para a flexibilidade, a realização de exercícios de alongamento tem sido amplamente recomendada pela literatura. De qualquer forma, poucos estudos analisaram o efeito crônico do treinamento da flexibilidade em diferentes volumes sobre a CF de idosos. Desta forma, o objetivo desse estudo foi analisar o efeito de 16 semanas de treinamento de flexibilidade, através de alongamento estático, realizado com dois diferentes volumes, sobre a CF de idosas. Participaram deste estudo 23 mulheres (67,4 ± 7,3 anos; 64,9 ± 8,7 kg; 155,1 ± 5,8 cm; 27,5 ± 3,5 kg/m2) divididas em dois grupos: Grupo Treinamento de 30 segundos (GT30, n=15) e Grupo Treinamento de 60 segundos (GT60, n=8). As participantes do GT30 e GT60 foram submetidas ao treinamento de flexibilidade, com duração de 16 semanas e freqüência de três vezes semanais. Durante cada sessão de treinamento, as participantes realizaram três séries de exercícios de alongamento para os grupos musculares de membros superiores, inferiores e tronco, com intervalo de 30 segundos entre as repetições e entre os exercícios. A CF foi avaliada por meio da bateria de testes motores da American Alliance for Health, Physical Education, Recreation and Dance (AAHPERD) tanto no momento pré quanto após oito e 16 semanas de treinamento. Para o tratamento dos dados foi utilizada estatística descritiva (média e desviopadrão), test t de Student para amostras independentes... (Resumo completo, clicar acesso eletrônico abaixo)

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Several studies have shown that different stretching routines can lead to decreases on acute neuromuscular system performance. Although the deficit in muscle strength mediated by different methods of stretching has been systematically observed, few studies have investigated the possible existence of a dose-response relationship between the amount of stretching and muscle strength deficit in older adults. In this context, the objective of this study was to investigate the acute effect of two different stretching volumes on isometric force-time curve (Cf-t) in elderly women. The study included 13 older women (64.08 ± 4.27 years, 69.98 ± 10.56 kg, 157.90 ± 8.66 cm, 28.25 ± 4.22 kg/m²). The participants visited the laboratory for five consecutive days, among which the first two were used for familiarization. During the other three days the participants underwent experimental conditions: control (C) stretch 30 seconds (AE30) and stretch 60 seconds (AE60). For the AE30 and AE60 conditions, three series of passive static stretching were performed, with duration of 30 and 60 seconds, respectively. The experimental conditions were performed with an interval of at least 24 hours between them and the order of execution was randomized. The recording of isometric Cf-t of the knee extensor muscles was performed in extensor chair connected to a force transducer. Measurements were recorded immediately after each experimental condition, for five seconds. For statistical analysis, descriptive procedures were used and ANOVA one way to check possible changes on the Maximal Voluntary Contraction (CVM) and Peak Rate of Force Development (TDFP) among the three conditions (p <0.05). The ANOVA showed no statistically significant difference for CVM and TDFP, between the three conditions. It can be concluded that different volumes of static stretching, three sets ...(Complete abstract click electronic access below)

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This work deals with the development of a switched-mode power supply circuit based on a Buck topology converter with a Boost Rectifier One-Cycle Control with Power Factor Correction developing, thus, a source of direct current for a module of 50 power LEDs that will be used in a lamp for public street lightning. It is presented, at first, some aspects about the most common technologies used in lamps of public street lightning in Brazil and a comparison with the White LED high power, which is the one that presents itself as the most promising among the existing market. Then it is presented the detailed development of the static converter switched PWM, consisting of a Boost rectifier with power factor correction and methodology of control One-Cycle Control associated with a Buck converter controlled by a PI method that operates as a direct current source . At the end of the simulation results of the circuit through the PSIM software are presented to verify the design behavior

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In this article are defended the possibility and the necessity of the teaching of the reception of art works in school education. Firstly, some relations between art and the development of both the human species and the individual are analysed in Georg Lukács and Lev Vygotsky’s works. In order to put in question the old assumption that opposes education and instruction, the discussion made by Gramsci on the grammatical teaching of Latin and Greek in the traditional school education is explored. In the article is concluded its path analysing the intentional and systematic formation of the reception of art works provided by school education based on Aleksei N. Leontiev’s works on the appropriation process of culture by the individual.

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Gingival recession is a common deformity that affects a large number of people. This condition is frequently associated with esthetic complains and may lead to dental hypersensitivity. Thus, various surgical procedures have been proposed to provide root coverage. Since the 1950s, free and pedicle gingival grafts have been greatly used for treating gingival recession. However, after the 1985 Miller gingival recession classification, and with the development of other appropriated techniques that use subepithelial connective tissue grafts, gingival recession treatments have resulted in more predictable outcomes, especially with respect to Class I and II sites, i.e., in the absence of interproximal bone loss. This article reported the importance of aesthetical periodontal treatment in the prosthetic rehabilitation of a patient with a class I gingival recession with 3 mm of vertical extension in the superior canine. The treatment plan consisted of root coverage using subepithelial connective tissue graft (SCTG) associated with construction of new prosthesis.

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Currently, periodontal aesthetics has been prized for harmony of the smile. The clinical crown lengthening, gingival excess or altered passive eruption, is effectively corrected by periodontal surgery. The purpose of this paper is to show, through a literature review, some types of surgery on clinical crown lengthening and root coverage. Clinical crown lengthening is done to Change the size of the anterior teeth and to optimize the cosmetic result of treatment with new coronal restoration and other cosmetic dental care. In general, the treatment plan and the choice of operative technique begin with careful clinical examination. Recessions tissue can be defined as a displacement of the gingival margin toward the junction mucogingival exposing the root surface. These, when present, impacting on patient comfort by providing the occurrence of cervical dentin hypersensitivity, and the esthetic, the amendment of the gum line. Successful treatment of recessions is based on knowledge of its etiology and assessment of predictability of surgical techniques that aim to root coverage. Through literature review, we can conclude that the types of surgery most often used are: 1) to increase the clinical crown, gingivectomy, flap surgery and gingivoplasty osteotomy, and 2) for root coverage, the use will depend on the amount of gum keratinized and especially the classification of Miller.

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Esse artigo tem como objetivo demonstrar o restabelecimento estético do sorriso obtido por meio da associação de facetas diretas e fibra de reforço. As fibras de reforço são utilizadas como alternativa para substituição de elementos dentários perdidos e possuem indicações precisas, sendo empregadas em diversas especialidades da Odontologia, devido à sua capacidade de aumentar a resistência à tração dos compósitos, o que aumenta a resistência à compressão das fibras. Para o completo restabelecimento do sorriso, muitas vezes é necessário reanatomizar os dentes adjacentes, considerando as condições em que esses se apresentam. Sendo assim, o profissional deve ter conhecimento para aplicação correta da técnica e restabelecimento da estética ao paciente.

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O enceramento diagnóstico é uma ferramenta de grande importância dentro da filosofia atual de excelência estética no tratamento restaurador indireto. Trata-se da reprodução em cera realizada a partir de um modelo de estudo e tem como finalidade observar, em três dimensões, a futura forma final dos dentes, ajudar visualmente na realização do preparo dentário e demonstrar ao paciente o resultado final do tratamento antes mesmo de iniciá-lo, obtendo-se, assim, máxima previsibilidade. O objetivo desse artigo é mostrar, através de casos clínicos, a previsibilidade no tratamento restaurador indireto obtida por meio do enceramento diagnóstico.