Edge Influence
Mostrando 37-48 de 116 artigos, teses e dissertações.
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37. CFD analysis of tube-fin 'no-frost' evaporators
The purpose of this paper is to assess some aspects of the design of evaporators for household refrigeration appliances using Computational Fluid Dynamics (CFD). The evaporators under study are tube-fin 'no-frost' heat exchangers with forced convection on the air-side and a staggered tube configuration. The calculation methodology was verified against experi
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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38. Influência climática e antrópica na abundância e riqueza de Calliphoridae (Diptera) em fragmento florestal da Reserva Biológica do Tinguá, RJ
Monthly collections were made using two traps 5 m apart exposed for 48h, containing sardines and installed at points: A at the edge (500 m from the entrance of the Reserve); B 1200 m from the entrance and 1000 m inside the forest; and C 1700 m from the entrance and 500 m inside the forest. The purpose was to evaluate the abundance and richness of calliphorid
Neotropical Entomology. Publicado em: 2010-08
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39. Estudo do ensaio de determinação da tenacidade à fratura em deformação plana (KIc) em PMMA e análise das tensões desenvolvidas por fotoelasticidade. / Study of test for determining fracture toughness in plane strain (KIc) in PMMA and stress analysis developed by photoelasticity.
Single-Edge-Notch Bending samples produced out of compression-molded plates obtained from a commercial Poly(methyl metacrylate), PMMA, resin were investigated concerning the influence of the adopted pre-cracking methodology on plane strain fracture toughness results according to ASTM D 5045 standard. Two sets of 6 samples each were pre-cracked using a sharp-
Publicado em: 2010
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40. Efeitos da adição de átomos de Mn na rede do GaN via métodos de estrutura eletrônica
A computational method to simulate the changes in the electronic structure of Ga1-xMn xN was performed in order to improve the understanding of the indirect contribution of Mn atoms. This periodic quantum-mechanical method is based on density functional theory at B3LYP level. The electronic structures are compared with experimental data of the absorption edg
Química Nova. Publicado em: 2010
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41. Management of lianas in semideciduous forest and cerradão edges, Santa Rita do Passa Quatro, SP / Manejo de lianas em bordas de floresta estacional semidecidual e de cerradão, Santa Rita do Passa Quatro, SP
In São Paulo state, throughout the same climatic zone, semideciduous forests and cerradão patches commonly share the same geographic area. Currently, these two formations are reduced to small fragments, in advanced stage of disturbance. Along with the fragmentation of the forest, there is an increase in ligth incidence at the edges and lianas generally inc
Publicado em: 2010
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42. Alteração no uso e cobertura do solo na bacia do médio rio Araguaia, Brasil central / Land use land and cover changes in the middle Araguaia river basin, central Brazil
The central region of the Araguaia river basin encompasses a transition area between the Tropical Rain Forest and the Cerrado in Brazil. Despite of the fact that during the last four decades, this area has undergone an intense deforestation process, the quantification and impact of these changes are still unknown. Thus this study aimed to evaluate the dynami
Publicado em: 2010
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43. Variabilidade subinercial das correntes na plataforma continental ao largo de Cabo Frio (RJ): observações / Subtidal variability of the currents on the continental shelf off Cabo Frio (RJ): observations
This work was developed within the context of the continental shelf hydrodynamics, with the aim of studying the subtidal variability of the currents in the far north of the South Brazil Bight (SBB). The area of the study is located in the vicinity of Cabo Frio (RJ) and Arraial do Cabo (RJ) (approximately 23º S / 42º W). Despite being a well known and studi
Publicado em: 2010
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44. Influência de um corte na borda tracionada de uma viga maciça simulando uma emenda de topo na lâmina inferior de vigas laminadas coladas / The influence of a cut in the tensioned edge of a solid beam simulating a butt joint at the bottom lamination of glued laminated beams
A madeira laminada colada (MLC) é um produto estrutural que permite racionalizar o uso da madeira sólida, pois a partir de pequenas peças selecionadas e preparadas é possível produzir grandes vigas das mais variadas formas. A utilização da madeira de reflorestamento na produção de MLC lhe confere vantagens ambientais sobre outros materiais e o Eucal
Publicado em: 2010
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45. Evaluation axisymmetric analysis of thermal stress residual near fiber/epoxy interface
The finite element method is used to compute and analyze the residual stresses particularly near the fiber/epoxy interface, and these stresses need to be taken into account. An axisymmetric model has been used for stress computation and analysis, in this work two cases are considered by using an epoxy matrix with respectively glass and carbon fibers with a d
Materials Research. Publicado em: 2009-06
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46. Performance evaluation of carbide tools on automotive valve guides reaming / Avaliação do desempenho de ferramentas de metal duro no alargamento de guias de válvulas automotivas
Reaming is a machining process with relatively low cost and suitable when high quality holes are required. The purpose of this work is to evaluate the quality of the holes made in automotive valve guides, fabricated with sintered steel. This study was based on parameters of surface roughness, roundness and cylindricity deviations, obtained with uncoated carb
Publicado em: 2009
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47. Effect of monomer content in the monomer-polymer proportion on complete denture teeth displacement / Efeito do conteudo de monomero na proporção monomero-polimero no deslocamento dental em protese total superior
The purpose of the study was to verify the linear displacement of the teeth in complete upper denture made with acrylic resin, with monomer content indicated by the manufacturer, with 25% in excess and 25% less, in the conventional and microwaves polymerization techniques. Thirty casts were made with type III stone plaster, based on silicone mould, represent
Publicado em: 2009
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48. Uma contribuição a melhoria do processo de fresamento de ferro fundido vermicular - CGI / A contribution to the improvement of the milling process machining compacted graphite iron - CGI
Since the beginning of this century, researches about the development of diesel engines have been intensified, aiming to increase its energy efficiency and to reduce the levels of emission of pollutants. One the way to increase this efficiency is to increase the peaks of pressure of fuel explosion in the combustion chamber. The grey casting iron material is
Publicado em: 2009