Youngs
Mostrando 1-12 de 72 artigos, teses e dissertações.
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1. Medición del módulo de Young en metales mediante la técnica de excitación por impulso
ABSTRACT The impulse excitation, as non-destructive technique, allows to determine the elastic constants of materials by means of measurement of natural frequency of vibration of bars in different modes, excited by an impact in a point. In this work, the Young’s modulus of copper, aluminum and copper-based alloys samples was determined. The measurements we
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Photodegradation of UHMWPE Filled with Iron Ore Fine
Ultra high molecular weight polyethylene (UHMWPE) is one of the most important engineering materials owing to outstanding properties like impact strength and abrasion resistance. However, the relatively low Young´s modulus restricts some application and the use of fillers may be a suitable way to overcome this. The fillers can influence the photo stabilizat
Mat. Res.. Publicado em: 23/01/2017
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3. Glass Forming Ability and Mechanical Properties of Zr57.52Co21.24Al9.24Ag12 bulk metallic glass
The effect of the partial substitution of Al for Ag in the glass forming ability (GFA) of the Zr57.52Co21.24Al21.24-xAgx (x = 8, 10, 12, and 14 at. %) family alloy are reported and discussed. Cylindrical and conical ingots were obtained using the suction casting technique. It was found that the Zr57.52Co21.24Al9.24Ag12 alloy showed a glassy structure, with a
Mat. Res.. Publicado em: 10/10/2016
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4. Composition, Elastic Property and Packing Efficiency Predictions for Bulk Metallic Glasses in Binary, Ternary and Quaternary Systems
The results of database based on the efficiency packed model for metallic glasses. The database contains the atomic radii information as well as elastic properties of the most commonly used alloying elements, permitting composition, packing efficiency and elastic property predictions to be made for binary, ternary and quaternary bulk metallic glasses. Twenty
Mat. Res.. Publicado em: 08/03/2016
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5. Potencialidades computacionales del Método de los Elementos Finitos para la modelación y simulación de materiales compuestos: revisión
This work presents a review of computational models that use the Finite Elements Method (FEM) for the study of composite materials mechanical behavior, focusing the analysis in materials reinforced by particles or fibers. Bibliographic analysis shows that using FEM it is possible to successfully estimate the effect on the composites mechanical properties, of
Matéria (Rio J.). Publicado em: 2015-06
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6. Influence of intercalation methods in properties of Clay and carbon nanotube and high density polyethylene nanocomposites
In this work, nanocomposites with simultaneous dispersion of carbon nanotubes and clays in a high density polyethylene (HDPE) matrix were prepared. Two different processes of preparation were employed: solution or melt intercalation. Two different montmorillonite clays were used separately: a natural (MMT-Na) or an organoclay (MMT-30B) and it was used multiw
Mat. Res.. Publicado em: 2014-12
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7. A identificação de jovens com altas habilidades: uma abordagem winnicottiana da criatividade / High ability identification on youngs: a winnicottian approach to creativity
Este trabalho tem por finalidade pesquisar a criatividade na identificacao e selecao de criancas e adolescentes portadores de altas habilidades, com carencia socioeconomica, em uma amostra de dez jovens. A superdotacao ou altas habilidades tem sido objeto de estudo sobretudo quanto aos aspectos cognitivos e necessidades educacionais. Existem dois tipos de su
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/06/2012
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8. PRODUCTION AND CHARACTERIZATION OF NYLON 11 NANOCOMPOSITES REINFORCED WITH TIO2 BASED NANOMATERIALS / PRODUÇÃO E CARACTERIZAÇÃO DE NANOCOMPÓSITOS DE NYLON 11 REFORÇADOS POR NANOCARGAS A BASE DE TIO2
The fast technological developments comes with the need to obtain more materials combined with better performance. Polimeric materials, commonly used in our daily because of its characteristics of good strength, good chemical stability, easy processability and low cost, are still restricted for some applications owing to their low mechanical and thermal prop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/04/2012
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9. O local e o global na comunidade nipo-brasileira: um exercício sociológico sob o prisma dos jovens na cidade de São Paulo / Local and global in the Nipo-Brazilian community: a sociological exercise under the youngs perspective in São Paulo City
O enfoque deste trabalho é a análise da comunidade nipo-brasileira da cidade de São Paulo (o local) e o impacto do movimento decasségui (o global) nessa comunidade no Brasil. Para tanto, separamos a análise entre grupos externos à comunidade (a sociedade brasileira e o estereótipo positivo no Brasil, e a sociedade japonesa e o estereótipo negativo no
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/12/2011
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10. CURRÍCULO INTEGRADO DO PROJOVEM URBANO: do discurso oficial às percepções dos educadores do Programa / PROJOVEM URBAN INTEGRATED CURRICULUM: the official discourse of the educators perceptions of the program
The Integrated Curriculum of Urban Young pro purpose observes three humans necessities: schooling, professional qualification and citizen participation. However, its necessary to regard the teachers perceptions that operate it. Bibliographic, documental and camp research. Analyses the Urban Young Pro Curriculum by its constitution in the official speech leve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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11. Avaliar formando e formar avaliando o (futuro) professor de língua inglesa : elementos para um construto
Considerando a frequência e a pertinência das discussões relativas à avaliação deprofessores ao longo da última década no Brasil, este estudo, situado na Lingüística Aplicada, especificamente na área de formação de professores de línguas estrangeiras, partiu dos seguintes pressupostos: (1) a avaliação é indissociável do processo de ensino/a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/03/2011
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12. Alimentação de Potamotrygon signata e Potamotrygon orbignyi (Chondrichthyes: potamotrygonidae) na bacia do rio Parnaíba.
The evaluation of this diet, based on stomach content analisys, has already became rutine practice in fish ecology studies. The family Potamotrygonidae, represented by all Neotropical fresh water sting rays, is considered the only eslamobranch family whose members are totally restricted and adapted to this enviroment. The samples were obtained in the months
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2010