Análise estrutural não linear pelo metodo dos elementos finitos utilizando-se relaxação viscosa acelerada

Neste trabalho discute-se a utilizacfio da técnica de relaxacáo viscosa para a solucao de equacoes do método dos elementos finitos, visando-se a sua implementacao em computadores de processamento paralelo/vetorial. Os problemas de convergencia e número de iteracoes foram minimizados de modo a obter-se um algoritmo seguro e versátil, que oferece as seguintes vantagens: simplicidades de implementacáo , reduzida memória central e facilidade de refinamento e modificacóes da malha. Sfio apresentados estudos relativos a dois casos clássicos de leitura, tanto em regime linear quanto elástico plástico.This paper discusses the implementation of the accelerated viscous relaxation technique to be used in nonlinear finite element analysis on vector/parallel computers. The resulted approach have significant advantages: reduced central storage, great efficiency and the suitability for adaptative finite element analysis. Two classic elasto-plastic cases are studied and the obtained performance are examined for the linear and nonlinear ranges. 1s the authors opinion that the generated software can be considered as an engineering tool to treat complex problems with economy and versatility.Peer Reviewe

Análise estrutural não linear pelo metodo dos elementos finitos utilizando-se relaxação viscosa acelerada

Neste trabalho discute-se a utilizacfio da técnica de relaxacáo viscosa para a solucao de equacoes do método dos elementos finitos, visando-se a sua implementacao em computadores de processamento paralelo/vetorial. Os problemas de convergencia e número de iteracoes foram minimizados de modo a obter-se um algoritmo seguro e versátil, que oferece as seguintes vantagens: simplicidades de implementacáo , reduzida memória central e facilidade de refinamento e modificacóes da malha. Sfio apresentados estudos relativos a dois casos clássicos de leitura, tanto em regime linear quanto elástico plástico.This paper discusses the implementation of the accelerated viscous relaxation technique to be used in nonlinear finite element analysis on vector/parallel computers. The resulted approach have significant advantages: reduced central storage, great efficiency and the suitability for adaptative finite element analysis. Two classic elasto-plastic cases are studied and the obtained performance are examined for the linear and nonlinear ranges. 1s the authors opinion that the generated software can be considered as an engineering tool to treat complex problems with economy and versatility.Peer Reviewe

Estudo da suscetibilidade da Biomphalaria glabrata de Ourinhos (SP), à infecção pelo Schistosoma mansoni de Belo Horizonte (MG), e de São José dos Campos (SP)

Foi estudada a suscetibilidade da Biomphalaria glabrata de um foco de Schistosoma mansoni no município de Ourinhos, (SP, Brasil). Concluiu-se pela alta capacidade desses moluscos à infecção pelas cepas de S. mansoni de Belo Horizonte, Minas Gerais e de São José dos Campos, São Paulo.The susceptibility of Biomphalaria glabrata from Ourinhos, São Paulo, to strains of Schistosoma mansoni from Belo Horizonte, Minas Gerais and S. José dos Campos, S. Paulo, was studied. It was conclude that the molluscs has a high susceptibility to both strains of Schistosoma mansoni

Bacteriological evaluation in Salmon (Salmo salar) benefit in fish's warehouse in Rio de Janeiro, Brazil.

The consumption of raw fish is increasing in Brazil however it may present a higher risk to public health, because its integrity depends only on proper handling and storage. Hence, the use of effective means to ensure the safety of the product is extremely important. The aim of this investigation was to carry out microbiological analysis of salmon (Salmosalar) before and after the processing in a fish industry. The microbiological analyzes were: Salmonella spp(SS), Staphylococcus aureus (SA), total coliforms (TC), Escherichia coli (EC) and Aerobic Mesophilic Heterotrophic Bacteria (AMHB). The raw material and the final product had low levels of AMHB and SA. TC was in low concentration only in the final product. The SS and EC bacteria were not isolated. It is suggested that fish industries with ?good processing practices? can produce suitable raw fish to fresh consumption

Neinei -- The Neutron Imaging Center at the Brazilian Multipurpose Reactor

Neutron imaging is a non-destructive technique for analyzing a wide class of materials, such as archaeological or structures of industrial materials. Technological advances, in recent decades, have had a great impact on the neutron imaging technique, evolving from simple radiographs using films (2D) to modern tomography systems with digital processing (3D). The Instituto de Pesquisas Energ\'eticas e Nucleares (IPEN), in Brazil, houses a 5MW research nuclear reactor, called IEA-R1, where there is a neutron imaging instrument located at the beam hole 08 (BH08) with $1.0 \times 10^{6}$ $n/cm^{2}s$ in the sample position. IEA-R1 is over 60 years old and the future of neutron science in Brazil, including imaging, will be expanded on a new facility called the Brazilian Multipurpose Reactor (RMB). The RMB will house a suite of instruments at the Neutron National Laboratory, including the neutron imaging facility called Neinei. Inspired by recent work, we have calculated the thermal neutron flux at the sample position, using the Monte Carlo method, in the Neinei and compared it to the results obtained with the Neutra (PSI), Antares (FRM II), BT2 (NIST) and DINGO (OPAL) instruments. The results are promising and provide avenues for future improvements.Comment: 8 pages, 9 figures. Preprin

Poder calorífico de algumas substâncias alimentares da cozinha paulista

Apresentamos neste trabalho os primeiros resultados de experiências de nutriição, que sob vários aspectos encetamos no Instituto de Higiene

Estudo prévio de uma unidade industrial para produção de vinagrete sólido

Este trabalho consiste num estudo prévio tendo em vista o projeto de uma unidade industrial para a produção de vinagrete sólido. O produto em causa, o vinagrete sólido, assume-se como inovador, colocando-se como uma alternativa fácil para o tempero de saladas e potenciando novos sabores agradáveis ao paladar que cativem o consumidor. O trabalho inclui o estudo do processo, com descrição das etapas de preparação, os balanços mássicos, a descrição das peças de equipamento, a implantação fabril e uma breve estimativa do investimento necessário

NUTRITIONAL AND SENSORY EVALUATION OF CONVECTIVE DRIED FRUTI

Most vegetables and fruits are highly perishable due to a high water content, which makes it difficult to trade, since seasonality and distance between markets demand costly refrigerated storage and transportation. Increasing shelf life and availability throughout the year by processing reduces losses by marketing of fresh foods. The drying or dehydration is a technique used from the antiquity for the conservation of foods, once the water affects in a decisive way the time of preservation of the products, influencing his/her quality and durability directly. The objectives of the present work were to assess the nutritional quality and conduct consumer sensory evaluation testing of convective dried fruits. They were processed apple, bananas, papaya, melon, kiwi and pear. Convective drying was carried out in the dryer a tray cabinet at 60 C and 1.25 m.s-1 to obtain a product with 15% moisture content.  Dehydrated fruits were evaluated for their physicochemical and microbiological characteristics. The sensorial attributes were appraised for 30 consumers using climbs hedonic of five points. The results showed that the convective drying maintained the nutritional quality of the fruit when compared to the fresh product. Sensory analysis showed that the product obtained high acceptance rate, corresponding to the second and third levels of hedonic scale (liked and enjoyed regularly). The feature that predominantly influenced acceptance of the product was the appearance, flavor and aroma. The texture was the attribute that less influenced the acceptance