A dimensão ética do cinema de Walter Salles: hospitalidade, religação e perdão

Soulignant l´importance des transformations du discours politique du cinéma brésilien actuel, cet étude entreprend une analyse de la dimension éthique du cinéma de Walter Salles. Pour cela, nous avons parti de trois films long-métrages du directeur: Terra Estrangeira, Central do Brasil et Abril Despedaçado. Les films sélectionnés constituent les trois diférents chapitres de cette mémoire de maîtrise, qui s´articulent a des diférentes dimensions de l´éthique - l´hospitalité, la réliaison, et le pardon- et se présentent em format essayistique. Au texte, ces dimensions éthiques émergent à partir des récits, surtout des expériences existencielles des protagonistes et de ses singulières rencontres avec l´altérité. Comme tel, dialoguent avec des réflétions d´auteurs comme Edgar Morin, Zigmunt Bauman, Julia Kristeva, Paul Ricoeur et Hannah Arendt. Des diférents régistres de la connaissance -artistique, scientifique, religieuse- s´articulent donc dans le travail, et dialoguent en condition d´égalité. La recherche fait usage de matériels multiples qui incluent, au-delà des films mentionnés, et de ses respectifs scripts, des références à d´autres long-métrages et documentaires du directeur, ainsi que, des makingoffs, entretiens, et interprétations de commentaristes comme Lucia Nagib, Luiz Zanin Oricchio, Ivana Bentes, Pedro Butcher e Jurandir Freire Costa

DERSU UZALA Hibridação Homem-Natureza

Esta disertación explora de qué forma las hibridaciones entre ser humano y ambientes naturales no urbanos contribuyen a configurar las estrategias de atención, de construcción de conocimiento y de interacción con el mundo del sujeto y cómo, recursivamente, las actitudes perceptivo-cognitivas y las maneras de acercarse a lo real, de imputar sentido a los fenómenos y de interactuar con el ambiente practicadas por el sujeto condicionan y contribuyen a definir las hibridaciones entre humanos y no humanos. Lo que guía esa exploración es el concepto de híbrido que, inspirándome en Bruno Latour (2008), concibo como una asociación entre elementos sin características inherentes, compenetrados, que se redefinen, recrean e reconfiguran recíprocamente. Utilizo como operadores cognitivos una narrativa literaria y una cinematográfica: el libro autobiográfico Dersu Uzala del escritor y explorador ruso Vladimir Klavdievich Arseniev (1872-1930), publicado por primera vez en 1923, y la película homónima del director japonés Akira Kurosawa (1910-1998), lanzada en 1975. Estas obras reconstruyen tres expediciones realizadas por Arseniev a principios del siglo XX en la región siberiana del Ussuri que tuvieron como guía al cazador nómada de etnia gold Dersu Uzala, con quien el escritor construyó una profunda amistad. La elección de hacer dialogar en el mismo plan a dos modos complementares de conocimiento, arte y ciencia, se fundamenta en la concepción de Edgar Morin (2003b) de la literatura y el cine como escuelas de vida y de complejidad humana y en la visión de Claude Lévi- Strauss (2007) del arte como modelo reducido que favorece una mirada más abarcadora sobre los fenómenos. Inicialmente, pongo en relación mi investigación con los trabajos de Silmara Lídia Marton (2008) y Samir Cristino de Souza (2009), que analizaron las estrategias de construcción de conocimiento y de interacción con el mundo de un habitante de la Laguna de Piató (Municipio de Assú, Estado de Rio Grande do Norte, Brasil), Francisco Lucas da Silva, y muestro algunas analogías entre estas y las de Dersu Uzala, ambas productos de determinadas hibridaciones con el ambiente. A continuación, exploro las implicaciones cognitivas de la amistad de Arseniev con el cazador gold, metáfora/encarnación del diálogo posible entre saberes de matrices diferentes. En un tercer momento, dialogando con pensadores que se interrogaron sobre el trinomio hombre-naturaleza-representaciones y con las narrativas de Arseniev (1997) y Kurosawa (1975), reflexiono sobre las ideas de híbrido, de humano y no humano, de vivo y no vivo, de proximidad y distancia del sujeto con respecto a otros sistemas de lectura del mundo, de relación directa y mediada con lo real, de ambientes naturales urbanos y no urbanos. A seguir, incursiono en el libro de Arseniev y en el largometraje de Kurosawa intentando identificar qué factores más contribuyeron para configurar las estrategias de conocimiento y de interacción con el ambiente manifestadas por el explorador y por el cazador gold y, recursivamente, de qué forma esas estrategias contribuyeron a definir sus hibridaciones con el ambiente siberiano. Por último, a partir de las reflexiones tejidas a lo largo del trabajo, me interrogo sobre lo que ellas pueden decirnos sobre nuestra forma de interactuar con la naturaleza no humana y sobre el diálogo entre distintas formas de percibir, conocer y relacionarse con el mundo

Caracterização termo-mecânica de interconectores metálicos recobertos com filmes de LaCrO3

The cells unitaria of the solid oxide fuel cell are separated by means of interconnects, which serve as electrical contact between the cells. Lanthanum Chromite (LaCrO3) has been the most common material used as interconnect in solid oxide fuel cells. Reducing the operating temperature around 800 º C of cells to solid oxide fuel make possibilite the use of metallic interconnects as an alternative to ceramic LaCrO3. Metallic interconnects have advantages over ceramic interconnects such as high thermal conductivity, electricity, good ductility, low cost, good physical and mechanical properties. In this work evaluate the thermo-mechanical properties of the metallic substrate and coated metallic substrate with the ceramic LaCrO3 film via spray-pyrolysis, in order to demonstrate the feasibility of using this material as a component of a fuel cell solid oxide. The materials were characterized by X-ray diffraction, oxidation behavior, mechanical strength, optical microscopy (OM) and scanning electron microscopy (SEM). The X-ray diffraction proved the formation phase of the LaCrO3 on the metallic substrate and the identification of the phases formed after the oxidative test and mechanical strength at high temperature. The oxidation behavior showed the increased oxidation resistance of the coated metallic substrate. It was noted that the mechanical resistance to bending of the coated metallic substrate only increases at room temperature. The optical microscopy (OM) has provided an assessment of both the metallic substrate and the LaCrO3 film deposited on the metal substrate that, in comparison with the micrographs obtained from SEM. The SEM one proved the formation of Cr2O3 layer on the metallic substrate and stability of LaCrO3 film after oxidative test, it can also observe the displacement of the ceramic LaCrO3 film after of mechanical testing and mapping of the main elements as chromium, manganese, oxygen, lanthanum in samples after the thermo-mechanical tests.

Preparação e caracterização de filmes cerâmicos para cátodos de células a combustível de óxido sólido

Alternative and clean energy generation research has been intensified in last decades. Among the alternatives, fuel cells are one of the most important. There are different types of fuel cells, among which stands out intermediate temperature solid oxide fuel cell (IT-SOFC) matter of the present work. For application as cathode on this type of devices, the ceramic Ba0.5Sr0.5C0.8Fe0.2O3-δ doped with rare earth ions (Nd, Sm) have been quite promising because they show good ionic conductivity and operate at relatively low temperatures (500 - 800°C). In this work, Ba0.5Sr0.5Co0.8Fe0.2O3-δ, (BaSr)0.5Sm0.5Co0.8Fe0.2O3-δ and (BaSr)0.5Nd0.5C0.8Fe0.2O3-δ were obtained by modified Pechini method, making use of gelatin as polymerizing agent. The powders were characterized by X-Ray Diffraction (XRD), Temperature Programmed Reduction (TPR) and Scanning Electron Microscopy (SEM). The perovskite phase was observed in all X-ray patterns for the materials Ba0.5Sr0.5C0.8Fe0.2O3-δ doped with rare earth ions (Nd, Sm). The SEM images showed that the materials have a characteristics porous, with very uniform pore distribution, which are favorable for application as cathodes. Subsequently, screen-printed assymmetrical cells were studied by impedance spectroscopy, to assess the kinetics of the cathode for the reduction reaction of oxygen. The best resistance to the specific area was found for the cathode BSSCF sintered at 1050 °C for 4 hours with around 0.15 Ω.cm2 at 750 °C as well as cathodes BSNCF and BSCF obtained resistances specific area of 0.2 and 0.73 Ω.cm2, respectively, for the same conditions. The polarization curves showed similar behavior to the best cathodes BSSCF and BSNCF, such combination of properties indicates that the film potentially depict good performance as IT-SOFC cathodes

Construção de um aparato experimental para monitoramento in situ da deposição de filmes finos de titânio por magnetron sputtering

The technique of surface coating using magnetron sputtering is one of the most widely used in the surface engineering, for its versatility in obtaining different films as well as in the micro / nanometric thickness control. Among the various process parameters, those related to the active species of the plasma are of the most fundamental importance in the mechanism and kinetics of deposition. In order to identify the active species of the plasma, parameters such as gas flow, pressure and density of electric power were varied during titanium coating on glass substrate. By flowing argon gas of 10, 20, 30, 40 and 50 sccm (cubic centimeters per minute) for each gas flow a sequential scan of the electric current of 0.10, 0.20, 0.30, 0.40 , 0.50 A. The maximum value of 0.50 A was chosen based both on literature data and on limitations of the equipment. The monitoring of plasma species present during the deposition was carried out in situ by the technique of optical emission spectroscopy (OES) through the spectrometer Ocean Optics USB2000 Series. For this purpose, an apparatus was developed to adapt the OES inside the plasma reactor to stay positioned closest to the target. The radiations emitted by the species were detected by an optical fiber placed behind the glass substrate and their intensities as a function of wavelength were, displayed on a monitor screen. The acquisition time for each condition of the plain parameters was related to the minima of spectral lines intensities due to the film formed on the substrate. The intensities of different emission lines of argon and titanium were then analyzed as a function of time, to determine the active species and estimate the thickness of the deposited films. After the deposition, the coated glasses thin films were characterized by optical transmittance through an infrared laser. It was found that the thickness and deposition rate determined by in situ analysis were consistent with the results obtained by laser transmittance

Modificação superficial de filmes de poliéster usando plasma a baixa temperatura

A polyester film has a vast application field, due some properties that are inherent of this kind of material such as, good mechanical resistance, chemical resistance to acids and bases and low production cost. However, this material has some limitations as low superficial tension, flat surface, low affinity to dyers, and poor adhesion which impede the use of the same ones for some finality as good wettability. Among the existent techniques to increase the superficial tension, plasma as energy source is the more promising technique, because of their versatility and for not polluting the environment. The plasma surface polymeric modification has been used for many researchers, because it does not affect the environment with toxic agents, the alterations remains only at nanometric layers and this technique shows expressive results. Then, due to its good acceptance, polyester films were treated with oxygen plasma varying the treatment time from 10 to 60 min with an increase of 10 min to each subsequent treatment. Also, the samples were treated with a gas mixture (nitrogen + oxygen) varying the percentage of each gas the mixture from 0 to 100%, the treatment time remaining constant to all treatments (10 min). After plasma treatment the samples were characterized by contact angle, surface tension, Raman spectroscopy, Infrared attenuated total reflection (IR-ATR) and atomic force microscopy, with the aim to study the wettability increase of treated polyester films as its variables. In the (O2/N2) plasma treatment of polyester films can be observed an increase of superficial roughness superior to those treated by O2 plasma. By the other hand, the chemical modification through the implantation of polar groups at the surface is obtained more easily using O2 plasma treatment

Avaliação gerontológica multidimensional das condições de saúde de idosos residentes em instituições de longa permanência

Introdução/objetivos: A avaliação do estado de saúde de idosos institucionalizados é considerada prática essencial à promoção e recuperação da sua saúde, a qual deve incluir a investigação de aspectos multidimensionais e multidisciplinares relacionados ao envelhecimento saudável. O estudo objetivou avaliar as condições de saúde dos idosos residentes em instituições de longa permanência (ILPI) do município de Natal RN. Métodos: Trata-se de um estudo descritivo, longitudinal, envolvendo seis ILPI filantrópicas, com uma população de 243 idosos. A coleta de dados se deu por meio de entrevistas com os idosos nas instituições mediante a aplicação de um questionário com informações sócio demográficas, saúde e institucionalização, além de várias facetas multidisciplinares que envolvem a escala de avaliação cognitiva (Mini Exame do Estado Mental); o índex de KATZ, para avaliação das atividades da vida diária e uma análise do estado nutricional com questões antropométricas (peso, estatura, circunferência abdominal) e Índice de Massa Corpórea. Participaram do estudo todos os idosos com idade igual ou superior a 60 anos, que aceitaram responder a entrevista e assinaram o Termo de Consentimento Livre e Esclarecido e/ou a impressão datiloscópica. O projeto foi aprovado pelo Comitê de Ética em Pesquisa da Universidade Federal do Rio Grande do Norte, sob parecer n° 164/2011. Resultados: Os participantes do estudo incluem 243 idosos, sendo a maioria mulheres (172 = 70,7%), com média de idade de 79 ± 9,44 anos. 124 idosos são solteiros (51,0%) e 66 viúvos (27,0%). A prática de atividades físicas não é rotina nas instituições, onde a maioria dos idosos (82,7%; n = 201) não realiza nenhum tipo de atividade. 78% dos idosos (n = 192) chegou a instituição sendo levados por familiares, enquanto que apenas 18% (n = 44 idosos) por vontade própria e 4% (n = 7 idosos) não souberam responder. Quanto aos aspectos cognitivos, identificou-se que 64,2% dos idosos (n = 156) apresentaram alterações significativas dentro da pontuação dos escores com restrições em responder aos demais questionamentos durante a entrevista por apresentarem limitações cognitivas e/ou dificuldades senso perceptivas.Conclusão: O presente estudo evidenciou alterações cognitivas na maioria dos idosos institucionalizados impossibilitando-os a continuidade da realização da avaliação global da saúde. A identificação correta da perda cognitiva em idosos é de suma importância para a equipe de saúde a fim de promover a detecção precoce de alterações cognitivas e a adoção de tratamento adequado, no sentido de contribuir para uma melhor qualidade de vida desta população

A imagem da pessoa comum: sobre os filmes dos pontos de cultura de natal/rn

The following research aims to address the image of the ordinary person in the films of the Pontos de Cultura (Culture Points) in Natal-RN. About ten years the Federal Government of Brazil created the Cultura Viva (Living Culture) program. It enabled the State to support financially civil society organizations that had developed cultural works in communities across the country. Along with the resources the program developed, in parallel, another action, Cultura Digital (Digital culture), intended to bring the tools of digital technology for people who have never had access to them. As a result of these initiatives were produced short films. These films were characterized by the presence of the image of the ordinary person. The creation of this type of cultural product was benefited by state initiative, however, it was inserted within a historical, political and cultural construction whose research was necessary for this image understood to be understood by its importance: it is the expression of emancipation the ordinary person and not just as a consumer of culture, it identifies them as the protagonists of the society and recognizes their vital role in its organization

Imaginário radical e educação física: trajetória esportiva de corredores de longa distância

Cette étude propose une lecture du sport d endurance, prenant comme perspective théorique l imaginaire radical et considérant les dimensions socio-historiques e subjectives de la pratique de courses de longue distance. D abord, l échantillon la recherche a été composé de huit sujets-atlètes du groupe de courreurs de rue Sport Vida. Ainsi, em même temps que nous faisons une analyse socio-historique de cette pratique sportive, nous considérons l ensemble des aspects sócio-culturels et poursuivons la recherche avec comme objectif de comprendre les sens qui lui sont attribués par les sjuets-atlètes, au-delá de l aspect économique et de la consommation. Nous observons que, même si l altétismo qui est pratiqué a des aspects competitifs (economiques), les atlètes créent d autres sens pour continuer a pratiquer ce sport, comme les amitiés, être ensemble avec les amis. Ils rompent avec la logique déterministe du sport dépasser la limite du corps, vaincre à n importe quel prix, dépasser les collègues -, en cherchant des moments de solidarité, un sport sans violence et affectif. Nous percevons néanmoins des contradictions dans le discours de quelques atlètes quand confessent que le plus important est l amour du sport, les amitiés, mais réclament du manque de sponsorts et d appui pour pouvoir s entrainer tranquillement. Cette recherche a aussi montré que dans la pratique de ce sport, les atlètes construisent une obstination, sachant le sacrifice qu il impose au corps, mais cela se transforme en plaisir, excitation et recherche d émotions fortes. Valeurs éthiques sont aussi construites et valorisées dans l atlétisme, ce qui est observé lorsque que les sujets-atlètes critiquent avec véemence a propos de l usage de substances chimiques par les sportifs. En choisissant l imaginaire radical comme principale inspiration théorique pour cette recherche, il devient évident que le sport peut être ressignifié, à partir du moment que cet imaginaire est potencialisé dans l enseignement de l éducation physique, porvocant chez les élèves une réflexion critique sur la société et sur le sport, qui passe à être redimensionné vers la solidarité, avec démocratie et autonomie. Enfin, l étude a révélé que le sport d endurance est capable de créer des liens sociaux et structurer des relations à partir de cette pratique

Abordagem da ergonomia para a análise da acessibilidade de uma instituição de longa permanência para idosos da cidade de Natal-RN

This dissertation presents and discusses the results of an applied research on the accessibility of residents in a Long Term Care Institution (LTCIs) in the city of Natal- RN. The main objective of this research is to suggest projectual improvements that maximize the accessibility in a LTCIs of Natal-RN, considering the aspects of mobility, safety, comfort and independence of elderly residents. Moreover, one should consider the specific characteristics of the user population, capabilities and limitations of the biological process of aging, which causes damage to the neurological system, musculoskeletal and cardiovascular and progressively affects on visual acuity, balance and locomotion of elderly people. This research has a qualitative approach and divided into four phases: exploratory, bibliographical and documentary research, mapping of the LTCIs of Natal-RN, case study. The phase of the mapping presented an overview of accessibility on LTCIs of Natal-RN. The institution of the case study was defined based on the overall assessment of accessibility and ergonomics criteria, preceded by an application of an Ergonomic Work Analysis to understand the accessibility of the elderly people. Interactional and observational methods were used to collect field data. To this end, an intense process of social construction was conducted, involving the elderly residents, caregivers, health professionals and general servants and LTCIs´ managers. It was found that the NBR 9050 is not comprehensive to solve the diversity of accessibility problems found in LTCIs. All LTCIs investigated were in disconformity to the NBR 9050. In the case study, it was found that the inappropriate design hinders the daily activities of the elderly people and is a source of risk of accidents. The environment, facilities and lack of assistive technologies hinder the autonomy of the elderly people, and this LTCI requires ergonomic intervention to improve the accessibility, autonomy and security of the elderly people

Diagnóstico de plasma de cátodo oco: análise da ação de plasma de argônio e Ar-H2 para a deposição de filmes finos de titânio em pós-descarga

Plasma DC hollow cathode has been used for film deposition by sputtering with release of neutral atoms from the cathode. The DC Plasma Ar-H2 hollow cathode currently used in the industry has proven to be effective in cleaning surfaces and thin film deposition when compared to argon plasma. When we wish to avoid the effects of ion bombardment on the substrate discharge, it uses the post-discharge region. Were generated by discharge plasma of argon and hydrogen hollow cathode deposition of thin films of titanium on glass substrate. The optical emission spectroscopy was used for the post-discharge diagnosis. The films formed were analyzed by mechanical profilometry technique. It was observed that in the spectrum of the excitation lines of argon occurred species. There are variations in the rate of deposition of titanium on the glass substrate for different process parameters such as deposition time, distance and discharge working gases. It was noted an increase in intensity of the lines of argon compared with the lines of titanium. Deposition with argon and hydrogen in glass sample observed a higher rate deposition of titanium as more closer the sample was in the discharge

Filmes nanométricos de FeN e ALN crescidos por sputtering e aplicações do efeito peltier

This study will show the capability of the reactive/nonreactive sputtering (dc/rf) technique at low power for the growth of nanometric thin films from magnetic materials (FeN) and widegap semiconductors (AlN), as well as the technological application of the Peltier effect using commercial modules of bismuth telluride (Bi2Te3). Of great technological interest to the high-density magnetic recording industry, the FeN system represents one of the most important magnetic achievements; however, diversity of the phases formed makes it difficult to control its magnetic properties during production of devices. We investigated the variation in these properties using ferromagnetic resonance, MOKE and atomic force microscopy (AFM), as a function of nitrogen concentration in the reactive gas mixture. Aluminum nitride, a component of widegap semiconductors and of considerable interest to the electronic and optoelectronic industry, was grown on nanometric thin film for the first time, with good structural quality by non-reactive rf sputtering of a pure AlN target at low power (≈ 50W). Another finding in this study is that a long deposition time for this material may lead to film contamination by materials adsorbed into deposition chamber walls. Energy-dispersive X-ray (EDX) analysis shows that the presence of magnetic contaminants from previous depositions results in grown AlN semiconductor films exhibiting magnetoresistance with high resistivity. The Peltier effect applied to commercially available compact refrigeration cells, which are efficient for cooling small volumes, was used to manufacture a technologically innovative refrigerated mini wine cooler, for which a patent was duly registered

Propriedades magnéticas de multicamadas e filmes finos quasiperiódicos

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Propriedades magnéticas quase-estáticas de filmes ferromagnéticos amorfos de FeCuNbSiB

Today, one of the topics that attracts interest of the scientific community is the understanding of magnetic properties of magnetic systems with reduced dimensions, in particular, ferromagnetic thin films. In this case, the comprehension and control of these properties, as well as the development of routes to obtain them, are crucial issues in many aspects of current and future technologies for storage and transmission of information in the electro-electronic industry. There are several materials that exhibit soft magnetic properties, and we highlight the amorphous alloys and that ones obtained by partial crystallization, so-called nanocrystalline materials. The production of these alloys as magnetic ribbons is very common in scientific and technological area, but there are just a few works related to the production of these alloys as thin films. In this work, we studied the quasi-static magnetic properties of ferromagnetic thin films based on FeCuNbSiB in a wide range of thicknesses, from 20 to 500 nm, produced by sputtering. In particular, after the structural characterization performed via X-ray diffraction, the magnetic properties of the sets of samples were investigated using experimental magnetization curve, obtained using a vibrating sample magnetometer, as well as through theoretical curves obtained by theoretical modeling and numerical computation. The modeling process is based on the Stoner Wohlfarth model applied to three dimensions, and adds some energy terms, using as reference experimental results of magnetization. In this case, from the comparison between theoretical and experimental results and the analysis of the constant anisotropy behavior as a function of film thickness, we aim to obtain further information on the magnetization process of the samples, to identify routes for the production of thin films and develop a theoretical to films to use it, in the future, in the obtainment of the theoretical curves of some magnetic measurements, such as magnetoimpedance and magnetoresistance

Desenvolvimento de um sistema a jato de plasma obtido em cátodo oco para deposição de filmes finos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior