Encontrados 16 documentos, a visualizar página 1 de 2
Estudo da prevalência de crises epiléticas em indivíduos com idade superior a 6...
Ribeiro, Bernardo Fialho Simão MarquesIntrodução: Uma crise epilética é a manifestação clínica ou psíquica de um processo anormal de hiperatividade e/ou hipersincronia elétrica neuronal cerebral, que pode acometer o cérebro de forma parcial (focal) ou generalizada. Pode também variar, do mais breve lapso de atenção, ou espasmo muscular, até severas e prolongadas convulsões. As crises epiléticas afetam cerca de 2 a 3% da população mundial e, em estu...
A mechanical analysis of polydicyclopentadiene with metal inserts through flexu...
Camboa, André; Ribeiro, Bernardo Sousa; Nunes, J. P.; Alves, Jorge LinoPolydicyclopentadiene (PDCPD) is being used in several products with particular success regarding to weight reduction and surface finish improvement. Despite the enough good mechanical properties presented by this thermosetting polymer, it needs to be adequately reinforced in applications requiring extra structural stability. This work studies the improvement of mechanical properties that may be achieved in PDC...
Desenvolvimento de produtos reestruturados de corvina (Argyrosomus regius) de a...
Ribeiro, Bernardo de CarvalhoMestrado em Engenharia Alimentar - Qualidade e Segurança Alimentar - Instituto Superior de Agronomia ; Reestructurated fish products combining minced meagre and dietary fiber were developed in this work. In the first part of the work, the combination of microbial transglutaminase (MTGase) and dietary fibers (pea fiber, carrageenan fiber and konjac fiber) entailing the production of low-salt gel products from f...
An ethanol-based process to simultaneously extract and fractionate carotenoids ...
Ribeiro,Bernardo Dias; Nascimento,Rafaella Ferreira; Barreto,Daniel Weingart; Coelho,Maria Alice Zarur; Freitas,Suely PereiraMauritia vinifera (buriti) is a palm tree that grows wild in different areas of Brazil, particularly in the Amazonian region. The buriti oil is rich in carotenoids, especially in β-carotene. The growing interest in other natural sources of β-carotene has stimulated the industrial use of buriti as a raw material for pulp oil extraction. Most processes are based on the conventional technologies, involvi...
A Survey on Electric / Hybrid Vehicles
Ribeiro, Bernardo; Brito, F. P.; Martins, JorgeDOI: 10.4271/2010-01-0856 ; Since the late 19th century until recently several electric vehicles have been designed, manufactured and used throughout the world. Some were just prototypes, others were concept cars, others were just special purpose vehicles and lately, a considerable number of general purpose cars has been produced and commercialized. Since the mid nineties the transportation sector emissions ar...
O ensino de história nos primeiros anos do ensino fundamental : o uso de fontes
Susana Barbosa Ribeiro BernardoO presente trabalho está inserido no campo de reflexão a respeito do ensino de História e do saber discente. O objetivo principal foi o de refletir sobre a construção do saber histórico nos primeiros anos do ensino fundamental a partir do uso de fontes. Considerando a perspectiva teórica acerca da formação histórica apresentada pelo historiador alemão Jörn Rüsen, a pesquisa foi realizada no município de Tarumã ...
Thermodynamic analysis of Spark Ignition engines using the Entropy Generation M...
Martins, Jorge; Ribeiro, Bernardo Sousa; Ion, Ion V.The recent improvement on Spark Ignition Engines has been the result of improved engine thermodynamic cycles, made possible by advances in technologies such as Variable Valve Timing (VVT) and Variable Compression Ratio (VCR). To evaluate the potential of these techniques a thermodynamic analysis is made. Numerical models were implemented in Matlab Simulink using the laws of thermodynamics and include heat trans...
In-cylinder swirl analysis of different strategies on over-expanded cyclies
Martins, Jorge; Ribeiro, Bernardo Sousa; Teixeira, S. F. C. F.Innovative series hybrid vehicles have a small Internal Combustion Engine used as a “range extender”. This engine should work at steady conditions whenever is running. Therefore its development is quite different from engines intended to be driven (unsteady working conditions, such as accelerations). For thıs applicatıon the engine development seeks optimisation on a specified speed/load condition. Previous wor...
Thermodynamic optimisation of spark ignition engines under part load conditions
Ribeiro, Bernardo SousaTese de Doutoramento em Engenharia Mecânica - Máquinas Térmicas e de Fluidos ; The rational use of fossil fuels, the minimisation of noxious emissions and the reduction of green house gases emissions are the targets of internal combustion engines research and development activities. Several technological developments have been proposed to reduce the fuel consumption from engines. The integration of variable va...
Direct comparasion of an engine working under Otto, Miller end Diesel cycles : ...
Ribeiro, Bernardo Sousa; Martins, JorgeOne of the ways to improve thermodynamic efficiency of Spark Ignition engines is by the optimisation of valve timing and lift and compression ratio. The throttleless engine and the Miller cycle engine are proven concepts for efficiency improvements of such engines. This paper reports on an engine with variable valve timing (VVT) and variable compression ratio (VCR) in order to fulfill such an enhancement of eff...
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