Cured Fraction
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Research on the Specific Heat Capacity of PBX Formulations Based on RDX
ABSTRACT The experimental results of specific heat capacity of 2 plastic bonded explosives formulations based on 1,3,5-trinitroperhydro-1,3,5-triazine, using differential scanning calorimetry thermal analysis, and the theoretical ones calculated with the specific heat capacity and mass fraction of individual compounds are compared for a temperature range bet
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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2. Ballistic Efficiency of an Individual Epoxy Composite Reinforced with Sisal Fibers in Multilayered Armor
Sisal fibers are among the natural lignocellulosic ones with great impact resistance for potential use in polymer composites. This work evaluates the ballistic efficiency of the distinct individual components of a multilayered armor. These include the front ceramic, the back metallic sheet and the intermediate layer as either the conventional aramid fabric o
Mat. Res.. Publicado em: 23/10/2015
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3. Novos modelos de sobrevivência com fração de cura baseados no processo da carcinogênese
Neste trabalho propomos modelos de sobrevivência com fração de cura para descrever o mecanismo biológico da ocorrência do evento de interesse (câncer) em estudos da carcinogênese na presença de causas competitivas latentes independentes ou correlacionadas. A formulação dos novos modelos é baseada na modelagem estocástica da ocorrência dos tumore
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/05/2012
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4. Modelos de regressão com e sem fração de cura para dados bivariados em análise de sobrevivência / Models with and without fraction of cure for bivariate data in survival analysis
Neste trabalho são reunidos diferentes modelos e técnicas para representar situações experimentais ou observacionais de análise de sobrevivência. Para modelar respostas bivariadas e covariáveis foi proposto o modelo de regressão Kumaraswamy-Weibull bivariado. A presen»ca de indivíduos curados foi considerada sob duas diferentes abordagens, originan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/08/2011
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5. Tensile behavior of lignocellulosic fiber reinforced polymer composites: Part I piassava/epoxy
The fibers extracted from the piassava palm tree, scientifically known as Attalea funifera, are among the stiffest lignocellulosic fibers being considered for polymer composite reinforcement. Characterization of piassava composites have been carried out for different polymeric matrices and mechanical tests. In this work the tensile properties of DGEBA/TETA e
Matéria (Rio de Janeiro). Publicado em: 2010
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6. Fenómenos de relajación interfacial en compuestos epoxi/aluminio
Interfacial dielectric relaxation has been studying in composite materials made with epoxy resin and aluminum. Electric modulus, which has been proposed for the description of systems with relaxation process, presents advantages in comparison to the classic approach of the real and imaginary part of dielectric permittivity. In composite polymer materials, re
Matéria (Rio de Janeiro). Publicado em: 2008-06
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7. Influencia do conteudo volumetrico das particulas de cargas nas propriedades mecanicas de diferentes materiais de moldagem / Mechanical properties of impression materials by volumetric filler content
Based on the incomplete understanding on how filler features influence the properties of elastomeric impression materials, the purpose of this study was to determine the inorganic filler fraction and size of five commercially available alginates (Jeltrate; Jeltrate Plus, Jeltrate Chromatic Ortho, Hydrogum e Ezact Krom) and nine addition/condensation silicone
Publicado em: 2008
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8. Influência do modo de ativação e de uma restauração simulada de porcelana no grau de conversão e na dureza superficial de um cimento resinoso auto-adesivo de cura dual / Influence of polymerization mode and a simulated ceramic restoration on degree of conversion and surface hardness of a dual-cured self-adhesive resin cement
The aim of this study was to evaluate the degree of conversion (DC) and the microhardness of a self-adhesive resin cement under different activation protocols, immediately and after 24 hours of the beginning of the polymerization, and, defining cement regarding monomer composition, average diameter of the inorganic fillers and the percentage by weight of the
Publicado em: 2008
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9. Influência de diferentes fontes fotoativadoras na conversão de resinas compostas
This study evaluated the influence of different light sources on the conversion of different composite resins by Differential Scanning Calorimetry (DSC). Initially was determined the standard of the devices emission of light, one halogen light curing unit (Optilux 500 - Demetron/Kerr) and three generations of LEDs (LEC-470 I - MMOptics, Radii Plus - SDI and
Publicado em: 2007
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10. A methodology for quality control evaluation for laminated composites manufacturing
Composites made by hand lay-up are directed influenced by some fabrication factors, e.g. the stacking sequence, fiber volume fraction, as well as the cure process This study takes into consideration an E-glass/epoxy plain weave woven fabric composite made by hand lay-up. After the stacking sequence is completed, three sets of plates are selected and each one
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-09
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11. Argamassa de cimento reforçada com fibras de bagaço de cana-de-açucar e sua utilização como material de construção
In this research, "Cement mortar reinforced with sugar cane bagasse fibers and its use as building material", the use of solid waste from sugar alcohol industry as a component to alternative material. The addition of cane bagasse to cement mortar can result in a good building material, provided that problems of chemical incompatibility of fiber and cement ar
Publicado em: 1996
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12. Persistent left ventricular disease in clinically "cured" primary endocardial fibroelastosis.
We studied by serial cardiac catheterisation eight patients with the dilated form of primary endocardial fibroelastosis in whom congestive heart failure disappeared with treatment. All remained without symptoms for at least three years before recatheterization. Four patients showed regression of the abnormal electrocardiographic findings, three showed persis