Parameter Space
Mostrando 13-24 de 187 artigos, teses e dissertações.
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13. Morphometric study of the corpus cavernosum after anabolic androgenic steroid administration in pubertal and adult rats
PURPOSE: To evaluate the penile morphological modifications of pubertal and adult rats chronically treated with supra-physiological doses of anabolic androgenic steroids. METHODS: Forty-eight male Wistar rats were distributed into four groups: two control groups, 105- and 65-day-old (C105 and C65, respectively) injected with peanut oil (vehicle); and two tr
Acta Cir. Bras.. Publicado em: 2015-07
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14. Reflection of attenuated waves at the surface of a fractured porous solid saturated with two immiscible viscous fluids
The mathematical model for wave motion in a fractured porous solid is solved for the propagation of harmonic plane wave along a general direction in 3-D space. The solution is obtained in the form of Christoffel equations, which are solved further to define the complex velocities and polarisations of five attenuated wavesin the medium. Four of these waves ar
Lat. Am. j. solids struct.. Publicado em: 2014-12
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15. Weldability studies and parameter optimization of AISI 904L super austenitic stainless steel using friction welding
Welding input parameters play a very significant role in determining the quality of a weld joint. The quality of the joint can be defined in terms of mechanical properties, distortion and weld-bead geometry. Generally, all welding processes are employed with the aim of obtaining a welded joint with the desired characteristics. The purpose of this study is to
Mat. Res.. Publicado em: 04/07/2014
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16. Three dimensional vibration and bending analysis of carbon nanotubes embedded in elastic medium based on theory of elasticity
This paper studies free vibration and bending behavior of singlewalled carbon nanotubes (SWCNTs) embedded on elastic medium based on three-dimensional theory of elasticity. To accounting the size effect of carbon nanotubes, non-local theory is adopted to shell model. The nonlocal parameter is incorporated into all constitutive equations in three dimensions.
Lat. Am. j. solids struct.. Publicado em: 2014
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17. ZONAS ESPECIAIS DE INTERESSE SOCIAL: A INSTITUCIONALIZAÇÃO DA SEGREGAÇÃO SÓCIO-ESPACIAL EM JOÃO PESSOA PB.
This study aimed to analyze the process of Institutionalization of Special Zones of Social Interest (SZSI) in João Pessoa - PB. The historical process of production of urban space in Brazil, based on dictates of the capitalist system, it produced the phenomenon of separation between social classes in relation to levels of income .This separation is embodied
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2012
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18. Estudo de propriedades petrofísicas de rochas sedimentares por Ressonância Magnética Nuclear / Petrophysical properties study of sedimentary rocks by Nuclear Magnetic Resonance
The Nuclear Magnetic Resonance (NMR) technique is one of the most versatile techniques for scientific research, specially for the study of dynamics, structure and conformational of materials. In particular, its application in oil science is one of its first routine applications. Methodologies developed specifically to match this scientific community proved t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/05/2012
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19. Estudo numérico da dinâmica de osciladores forçados no espaço de parâmetros / Numerical study of the dynamics of driven oscillators in the parameter spaces
Nesta dissertação estudamos a dinâmica dos osciladores forçados, via estudo do espaço (plano) de parâmetros. Para caracterizar o comportamento no espaço de parâmetros, usamos dois métodos: um que calcula somente o maior expoente de Lyapunov e o outro que calcula o espectro de Lyapunov. Os sistemas estudados nessa dissertação são: três osciladore
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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20. Diagramas de bifurcação para um oscilador de chua quadridimensional / Bifurcation diagrams for a four-dimensional chua oscilllator / Bifurcation diagrams for a four-dimensional chua oscilllator / Diagramas de bifurcação para um oscilador de chua quadridimensional
In this work, we numerically studied a four-dimensional Chua circuit model through bifurcation diagrams and parameter spaces. Our main objective here is to ex-tend the studies already realized in this system, showing a wider range of its behavior. For this purpose, we constructed the parameter spaces using the Lyapunov exponents spectrum through color scales
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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21. Estudo da dinâmica de um laser de fibra de dois anéis dopado a érbio / Study of dynamics of an erbium-doped fiber dual-ring laser
O laser de fibra de dois anéis dopado a érbio é um sistema dinâmico quadridimensional a tempo contínuo, modelado por um conjunto de quatro equações diferenciais ordinárias de primeira ordem autônomas, e tem sido investigado nos últimos anos devido as diversas aplicações, como por exemplo, controle de caos, sincronização de caos e sistemas de te
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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22. In vitro evaluation of the whitening effect of mouth rinses containing hydrogen peroxide
The aim of this study was to evaluate the bleaching effect of two mouth rinses containing hydrogen peroxide. Thirty premolars were randomly divided into two groups (n = 15): Listerine Whitening (LW) and Colgate Plax Whitening (PW). The teeth were fixed on a wax plate and with acrylic resin, at a distance of 5 mm between each other, exposing the buccal surfac
Brazilian Oral Research. Publicado em: 2012-06
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23. Avaliação do desempenho tecnológico de misturas de farinhas de triticale e trigo em produtos de panificação / Evaluation of technological performance of mixtures of triticale and wheat flours in bakery products
O triticale (híbrido do trigo e centeio) apresenta maior e melhor qualidade nutricional e uma flexibilidade ambiental maior que os outros cereais, incluindo o trigo. O objetivo deste trabalho foi avaliar o desempenho da aplicação de farinha de triticale, originada de cultivares recomendadas para cultivo e desenvolvidas por Institutos de Pesquisa Brasileir
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
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24. Rate control system algorithm developed in state space for models with parameter uncertainties
Abstract researching in weightlessness above the atmosphere needs a payload to carry the experiments. To achieve the weightlessness, the payload uses a rate control system (RCS) in order to reduce the centripetal acceleration within the payload. The rate control system normally has actuators that supply a constant force when they are turned on. The developme
J. Aerosp. Technol. Manag.. Publicado em: 2011-12