Rod Theory
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. GALILEO’S PENDULUM AS A MAGNETIC BALANCE FOR STUDYING CHEMICAL MAGNETISM AT HOME
A very simple, but rich experiment, encompassing a classical Galileo’s pendulum, has been devised to be performed at home, especially during the Covid-19 pandemics. The experiment uses a miniature supermagnet rod as the pendulum oscillating element suspended from a fixed sewing thread. Its physics can be fully investigated, allowing to study the oscillatio
Quím. Nova. Publicado em: 2021-01
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2. Análise das variáveis de entrada de uma rede neural usando teste de correlação e análise de correlação canônica / Analysis of input variables of an artificial neural network using bivariate correlation and canonical correlation
The monitoring of variables and diagnosis of sensor fault in nuclear power plants or processes industries is very important because an early diagnosis allows the correction of the fault and, like this, do not cause the production interruption, improving operators security and its not provoking economics losses. The objective of this work is, in the whole of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2011
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3. Sistema especialista fuzzy para dimensionamento de bombeio mecânico
Despite the emergence of other forms of artificial lift, sucker rod pumping systems remains hegemonic because of its flexibility of operation and lower investment cost compared to other lifting techniques developed. A successful rod pumping sizing necessarily passes through the supply of estimated flow and the controlled wear of pumping equipment used in the
Publicado em: 2010
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4. Um modelo geometricamente exato de barras com grandes deformações, que considera a distorção e o empenamento geral da seção transversal, e sua discretização pelo método dos elementos finitos. / A fully nonlinear geometrically exact multi-parameter rod model that incorporates general in-plane and out-of-plane cross-sectional changes, and its discretization by Finite Element Method.
The main purpose of this work is to present a fully nonlinear geometrically-exact multi-parameter rod model that incorporates general in-plane cross-sectional changes as well as general out-of-plane cross-sectional warping. The formulation constitutes an extension of the earlier works presented in [1] to [6], [8] and [9], in the sense that the restrictions t
Publicado em: 2008
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5. Estudos de sistemas micelares usando voltametria com microeletrodos / Studies of micellar systems with microelectrode voltammetry
Voltammetry with platinum disc microelectrodes was employed to gain information on diffusion coefficients, D, of micelles in aqueous solution. Owing to the low solubility in water and high affinity for the micellar core, ferrocene was used as electroactive probe. Diffusion coefficients of hexadecyl trimethyl ammonium bromide (C16TABr) were determined in solu
Publicado em: 2008
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6. Analysis of a piston pin system with hydrodynamic lubrication / Analise dinamica de um sistema pino-pistão com lubrificação hidrodinamica
This work aims to analyze the dynamic behavior of the piston pin system. For this reason, a mathematical model for the slider-crank mechanism was developed, considering the influence of the hydrodynamic bearing of the piston-connecting rod joint. The dynamic analyses of the system applied two distinct models. The first represented the system when the piston
Publicado em: 2008
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7. Mecanical and numerical models to unidimensional flexible structures / Modelos mecânicos e numéricos para estruturas flexíveis unidimensionais
Apresentamos um modelo matemático geral, baseado na teoria de Cosserat para estruturas flexíveis unidimensionais, em regime de deslocamentos finitos e sujeitas a restrições unilaterais. Ao modelo geral agregamos a hipótese de inextensibilidade e, desprezando os efeitos do cisalhamento e das forças inerciais, formulamos o problema variacionalmente tanto
Publicado em: 2007
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8. A CONTRIBUTION TO THE THEORY OF INELASTIC RODS / UMA CONTRIBUIÇÃO À TEORIA DE ESTRUTURAS UNIDIMENSIONAIS INELÁSTICAS
A survey of rod¿s models which are not based in the three-dimensional theory is presented. One of the models is picked out and discussed in details (kinematics, efforts and balance laws). An elasto-plastic constitutive model is considered. This model takes into account large deformations and the extensibility of the tods. A series of numerical simulations o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/1986
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9. Retrogradação de geis de amido de milho : influencia de açucares, lipides e tipos de amido / Downgrading of Geis of cornstarch: the influence of sugars, lipids and types of starch
The retrogradation of: concentrated gels (starch-water) of 3 types of starch (extracted from 3 varieties of corn: Normal, Amylose Extender and Waxy) and the influence of 3 types of sugar (sucrose, maltose and glicose) and 4 types of triglycerides (TCM, Lauric, Babassu and Shortening) were investigated through the determination of the elastic modulus. Avrami
Publicado em: 1981
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10. Cone visual pigments are present in gecko rod cells.
The Tokay gecko (Gekko gekko), a nocturnal lizard, has two kinds of visual pigments, P467 and P521. In spite of the pure-rod morphology of the photoreceptor cells, the biochemical properties of P521 and P467 resemble those of iodopsin (the chicken red-sensitive cone visual pigment) and rhodopsin, respectively. We have found that the amino acid sequence of P5
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11. Macromolecular diffusion in crowded solutions.
The effects of crowding on the self or tracer diffusion of macromolecules in concentrated solutions is an important but difficult problem, for which, so far, there has been no rigorous treatment. Muramatsu and Minton suggested a simple model to calculate the diffusion coefficient of a hard sphere among other hard spheres. In this treatment, scaled particle t
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12. Measurement of live bacteria by Nomarski interference microscopy and stereologic methods as tested with macroscopic rod-shaped models.
A new method is proposed to measure bacterial cells under growth conditions. Bacterial cells, suspended in their growth medium, were attached to a cover slip with poly-L-lysine. The cover slip was inverted and placed on a glass microscope slide. To prevent dehydration of the medium, the edges of the cover slip were sealed to the microscope slide with clear f