A norma jurídica à luz da Semiótica de Peirce: um estudo de caso

Pós-graduação em Filosofia - FFC

Formação de professores à luz de Meirieu: interação reflexiva sobre a prática educativa

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.

A importância do programa Luz para Todos na redução das disparidades regionais brasileiras

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.

Resistência ao cisalhamento de bráquetes fotopolimerizados com arco de plasma, LED e luz halógena utilizando diferentes tempos

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.

Fotocatálise heterogênea de enterococcus faecalis e pseudomonas aeruginosa desencadeada pela ação da luz UV e branca em espátulas com revestimento de nanopartículas TiO2 e Ag

Nanotechnology, the science of minuscule, has developed products which are able t o manipulate atoms and molecules that could be applied in the sterilization process of dental instruments. Objetives: The objective of the present study was to evaluate the self-cleaning action of TiO2 and Ag nanoparticles coating on dental instruments by the photocataliys process under UV and visible light irradiation. Material and method: Microbiologic tests were done using dental cement spatulas coated with TiO2 and Ag nanoparticles (one or three layers), and contaminated with 10 mcrl of Pseudomonas aeruginosa and Enterococcus faecalis, respectively. After contamination, they were exposed to ultraviolet light and visible light for 120 minutes. Next, they were transferred to and stored in test tubes with BHI (Brain Heart Infusion) and incubated in 35 to 37 °C. Checking times for bacterial growth and for control and retrieval tests were done at: 24, 48, 72 and 96 hours. Result: The Pseudomonas aeruginosa was inactive after 120 minutes of ultraviolet light irradiation, thus confirming the heterogeneous photocatalytic activity of TiO2 and Ag. The Pseudomonas aeruginosa was not inactivated under visible light irradiation and the Enterococcus faecalis was not inactivated under UV and visible light irradiation of the dental cement spatulas coated with TiO2 and Ag nanoparticles in the readings to 96 hours, showing bacterial growth. Conclusion: There were no influence of one or three layers of TiO2 and Ag nanoparticles coating of the spatulas in the results. The heterogeneous photocatalysis activity of TiO2 and Ag under UV light irradiation was confirmed for Pseudomonas aeruginosa but not under visible light. Enterococcus faecalis did not confirmed the photocatalytics activity of TiO2 and Ag under UV light irradiation and visible lights irradiation.

Efeito de fontes de luz na microdureza de resinas compostas

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.

Influencia de diferentes intensidades de luz en la resistencia de unión de un sistema adhesivo utilizando un colorante fluorescente para su observación

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.

Obtenção e utilização de imagens de pacientes: proposta de termo de consentimento à luz do direito brasileiro

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.

O leitor no tribunal subversivo de João Guimarães Rosa: a benfazeja à luz da teoria do efeito

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.

Oportunidades e desafios para lidar com as barreiras à adoção de práticas de green supply chain management: guidelines à luz de um estudo de múltiplos casos no Brasil

This article aims to discuss how leading companies of the automotive battery industry installed in Brazil are dealing with barriers to the adoption of green supply chain management (GSCM) practices. From these discussions, we list the opportunities and challenges to the automotive battery sector in incorporating GSCM actions. We conducted a multiple-case study with the top five companies in this sector. The highlight factors are “organizational values” and “human resources” for internal barriers, and “suppliers” and “consumers” for external barriers.

Relações de trabalho dos jogadores profissionais do poker: um estudo à luz da psicossociologia

Pós-graduação em Psicologia - FCLAS

Irmão Sol, Irmã Lua: gênero, poder e clausura em um mosteiro da Ordem de Santa Clara de Assis - São Paulo

Pós-graduação em Ciências Sociais - FFC

As festas escolares no Brasil: uma análise a partir da literatura sobre a temática e à luz da teoria crítica

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

As convenções da OIT no ordenamento jurídico brasileiro à luz do tripartismo

Pós-graduação em Direito - FCHS