Desenvolvimento e caracterização de dispositivos eletroluminescentes contendo uma blenda polimérica condutora e Zn2SiO4:Mn

Despite the great development of organic and polymeric electroluminescent materials, the large scale commercial application of devices made with these materials seems conditioned to specific cases, mainly due to the high cost and the low durability, in compared to conventional technologies. In this study was produced electroluminescent devices by a process simple, drop casting. Were produced electroluminescent films containing Zn2SiO4:Mn immersed in a conductive polymer blend with different thicknesses. The morphological characteristics of these films were studied by scanning electronic microscopy. These films were used in the manufacture of electroluminescent devices, in which the light emission properties of the developed material were evaluated. The blend was composed of the conductive polymer Poly(o-methoxyaniline), doped with p-toluene sulfonic acid, and an insulating polymer, Poly(vinylidene fluoride) and its copolymer Poly(vinylidene fluoride-cotrifluoroethylene). To this blend was added Zn2SiO4:Mn, thereby forming the composite. A first set of devices was obtained using composites with different weight fraction of polymeric and inorganic phases, which were deposited by drop casting over ITO substrates. Upper electrodes of aluminum were deposited by thermal evaporation. The resulting device architecture was a sandwich type structure ITO/ composite/ Al. A second set of devices was obtained as self-sustaining films using the best composite composition obtained for the device of the first set. ITO electrodes were deposited by RF-Sputtering, in both faces of these films. The AC electrical characterization of the devices was made with impedance spectroscopy measurements, and the DC electrical characterization was performed using a source/ meter unit Keithley 2410. The devices light emission was measured using a photodiode coupled to a digital electrometer, Keithley 6517A. The devices electrooptical characterization showed that the...

Estudo comparativo in vitro do efeito da ciclagem térmica sobre a resistência à tração de copings metálicos cimentados sobre dentes naturais, utilizando se de dois agentes cimentantes

Pós-graduação em Odontologia Restauradora - ICT

Metodologia de simulação numérica do comportamento térmico em equipamentos eletroeletrônicos

Pós-graduação em Engenharia Elétrica - FEIS

Propriedade intelectual e Teoria Social Crítica: caso do aprimoramento de sementes e dos direitos dos agricultores

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Geração de energia por microturbina alimentada à biogás em uma propriedade rural: estudo de caso

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação microscópica da propriedade biológica e da biocompatibilidade do osso composto e do osso integral de origem bovina

The aim of this study was to evaluate the biological properties and biocompatibility of bovine non-demineralized lyophilized and composite bones implanted in tibiae bone cavities and at the subcutaneous level. Twenty-four rats were used and sacrificed 15 and 45 days later. At the subcutaneous level, after 15 days an inflammatory reaction was seen around biomaterial particles with the presence of giant cells and at 45 days fibrous connective tissue had also developed. No signs of ectopic bone formation were observed at tibiae regions; more bone neoformation was observed at the control group (15 days) with 42.8% of the outer cortex layer against 22.6% at Orthogen and 25% at GenMix groups. At 45 days, correspondent values for bone neoformation were 62.5% at control, 26% at Orthogen, and 35% at GenMix groups, respectively. It can be concluded that both materials tested were biocompatible aiming to bone neoformation by their osteoconductive properties with no ectopic formation sites observed.

Construção e avaliação térmica de um sistema concentrador parabólico com seguidor solar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Recuperação de área de preservação permanente através da nucleação como subsídio à adequação legal da atividade de extração de argila em pequena propriedade

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Fisiologia térmica e balanço hídrico em anfíbios anuros

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Desenvolvimento de uma rede de sensores sem fio aplicada no monitoramento da variabilidade térmica em casas de vegetação

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Sensação térmica do pedestre

This study has as main objective to identify the complains occurrences about pain in the spine segments, that are related to work standing posture, adopted by the collaborators in the production section of a food industry, in the city of Marília São Paulo state. A descriptive research and studying case was made, using 30 employees as a sample. It was used as methodological procedure, a questionnaire to obtain information on professional and personal data, posture to remain standing, the most uncomfortable postures in the work environment (signed by the form of Ranney, 2000) and pain (pointed out by Corllet and Manenica Diagram, 1980). It was also used the Nordic questionnaire (Kuorioka et al.,1986), validated in the Brazilian culture by Barros e Alexandre (2003) and adapted for the study, the direct evaluation and, a direct observation was made in the production work, a posture analysis using the OWAS Method. It was noticed that the posture of standing up is adopted during work, and 73.3% of the people that was interviewed said that they felt tired in consequence of this posture, especially when associated with trunk twists, trunk inclination and elevation of their arms above their heads. Most complains regarding pain through their bodies, by Corllet e Manenica (1980) pointed to the lumbar region, followed in the dorsal area and legs and in the neck area, shoulders and right thigh. The adapted Nordic questionnaire reveled the lumbar area, in 10 interviewed people (33.3%) as the area mostaffected by musculoskeletal symptoms, next in the dorsal area, with five people interviewed (16.7%) and one of them (3.3%) felt pain in the cervical area, none reported pain in the hips area. The postural analysis was applied using OWAS method, and it was identified the postures that demanded more effort in the four levels of musculoskeletal injuries. As conclusion, the standing up posture and the asymmetric and incorrect movements are related to pain in the spine, mostly in the lumbar area.

Propriedade intelectual e as indústrias criativas: cultura digital, regulamentação e as licenças públicas

When we think of a transposition from a traditional culture industry to the new coherence of the creative industries, a number of new parallel discussions arises, encircled by the reconfiguration of the value chain of such industries and, not only, but also due to a change on creation coherence of a product whose most valuable input is creativity. Therefore, as a mechanism through which such creativity is valued, the intellectual property becomes one of the key elements of this debate, mainly in a world where the coherence of distribution transcends the physical copies towards the digitization of content. From this initial debate, the present article seeks to weave the main relations between the theme of creative industries and the intellectual property, describing the adversities of a deficient regulation and its consequences on the creative industries production, indicating the existing alternatives and questioning the balance between two forces: the collective and the individual rights.

Influência de tratamentos a plasma na resistência à corrosão e na propriedade de adesão de uma camada protetiva sobre a superfície de ligas de alumínio

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estrutura supramolecular de um derivado de perileno em filmes finos fabricados por evaporação térmica a vácuo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)