Surfaces Technology
Mostrando 13-24 de 64 artigos, teses e dissertações.
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13. A imagem técnica nos processos comunicacionais e a definição do espaço virtual / The technical image on the communicational processes and the definition of virtual space
Towards the extensive use of the images in the media and its increasing popularity in the digital landscape, this dissertation studies what changes it makes extensive use of the images on communication and modern science. So, we gathered concepts developed by the philosopher Flusser (1920-1991) and dealing with the transmission of visual information in two-d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/05/2012
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14. Extensiometria óptica por Moiré geométrico digital para anãlise de tensões no plano / Optical extensometry by digital geometric Moiré for in-plane stress analysis
The study of the behavior of building structures pass through the determination of the strain and stresses to evaluate the level of local and global security against the active actions. In the last years in Brazil, the extensometers have been commonly used to measure the strain at a specific single point. The optical extensometry presents itself as an altern
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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15. Fases magnéticas de sistemas nanoestruturados de terras-raras
There is presently a worldwide interest in artificial magnetic systems which guide research activities in universities and companies. Thin films and multilayers have a central role, revealing new magnetic phases which often lead to breakthroughs and new technology standards, never thought otherwise. Surface and confinement effects cause large impact in the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/02/2011
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16. Electrocatalysis in wastewater treatment: recent mechanism advances
Over 50 years, several scientists and industries have developed new alternatives for wastewater treatment and remediation. Recently, electrochemical technology has been largely developed mainly because of its versatility and environmental compatibility. Scientific contributions about role of the electrode material have allowed determining that the influence
Química Nova. Publicado em: 2011
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17. Tecnologia assistiva : personalização em massa através do design e fabricação de assentos customizados para cadeiras de rodas
The design of customized seats manufactured in polyurethane foams is and alternative to improve comfort and positioning for people with disabilities, as those people spend hours of the day seated in the same position. These support surfaces increase the contact area between the seat and user. This aspect improves weight distribution reducing localized pressu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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18. Fabricação e caracterização de filmes automontados de PAH/BSA / Fabrication and characterization of LbL films of PAH / BSA
In the last years techniques have been developed for the development of science and technology concerning all science fields, such as physics, chemistry and biology. The study of the protein adsorption processes on the solid surfaces is of great importance in the development of biocompatible materials. The Layer-by-Layer deposition technique, where self-asse
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2010
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19. Revestimentos protetores de nitreto de silício para aplicações tribológicas extremas
O desempenho de componentes de engenharia está intimamente ligado a fenômenos de superfície, pois esta funciona como a interface entre o componente e o ambiente que o cerca. A escolha de um material com propriedades superficiais adequadas é fundamental para a sua funcionalidade. Neste trabalho as propriedades físico-químicas, estruturais e mecânicas d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2010
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20. Utilização da transformada de características invariante a escala (SIFT) na automatização da obtenção de pontos do Sistema de Imagens Tridimensional Híbrido (SITH) / Using the scale invariant feature transform (SIFT) in the automation of getting points of the three-dimensional hybrid imaging system (SITH)
This dissertation presents an improvement of the Three-Dimensional Hybrid Imaging System (SITH) that is used to obtain a three dimensional surface relief of a particular region from the same two consecutive air frames it. Photogrammetry is the science and technology used to obtain reliable information from images acquired by sensors. Improving the automation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/07/2010
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21. Fracture morphology of carbon fiber reinforced plastic composite laminates
Carbon fiber reinforced plastic (CFRP) composites have been extensively used in fabrication of primary structures for aerospace, automobile and other engineering applications. With continuous and widespread use of these composites in several advanced technology, the frequency of failures is likely to increase. Therefore, to establish the reasons for failures
Materials Research. Publicado em: 2010-09
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22. Sensor piezelétrico baseado na tecnologia dos eletretos termo-formados: aprimoramentos dos processos de produção / Piezoelectric sensor based on electrets thermoforming technology: improvements on the production processes
This work describes two improvements on the production of piezoelectric sensors, which are based on thermo-formed electrets technology. These sensors which were previously prepared by fusing and molding two Teflon FEP films into bubbles structures in a hot-press system, presented piezoelectric coefficients over 300 pC/N after properly electrical charging. Ho
Publicado em: 2010
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23. Surface activation of high impact polystyrene and polypropylene by nitrogen and atmospheric air dc plasmas / Ativação superficial de poliestireno de alto impacto e polipropileno por plasmas dc de ar atmosférico e nitrogênio
Among the treatment options for polymers surface modifications, the plasma technology has showed a wide potential due to its efficiency and low waste generation. Conventional chemical treatments by means of sulfochromic solutions and other solvents present risks to factory workers and additional costs with residues disposal.In this study, polypropylene and h
Publicado em: 2010
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24. Comparação das propriedades das superfícies da poliamida 6.6 tratada por plasma e por radiação ionizante / Comparison of the properties polyamide 6.6 surfaces treated by plasma and by ionizing radiation
Este trabalho tem por objetivo a comparação das propriedades da superfície da poliamida 6.6 tratada por plasma e por radiação ionizante, assim como determinar qual a melhor técnica e condição para ativação da superfície, visando a adesão da mesma e borracha poliacrílica utilizada na fabricação de retentores automotivos. O tratamento da poliami
Publicado em: 2010