Imposed Motion
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Dificultades conceptuales y matemáticas del modelo convencional de oscilaciones amortiguadas
Abstract A mathematical study on the subject of damped oscillations is expounded, focused on the computation of the constants of the equation of movement, their mathematical meaning and their implications on the behavior of systems. Examples are given of the initial value method for computing the constants, both for free and damped oscillations. Algebraic ex
Rev. Bras. Ensino Fís.. Publicado em: 06/12/2018
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2. Experimental vibration analysis for a 3D scaled model of a three-floor steel structure
In this paper we present an experimental study of a three dimensional physical model of a three-floor structure subjected to forced vibrations by imposing displacements in its support. The aim of this work is to analyze the behavior of the building when a dynamic vibration absorber (DVA) is acting. An analytic simplified analysis and a numerical study are de
Lat. Am. j. solids struct.. Publicado em: 2012-10
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3. Análise da influência de um calçado flexível e desprovido de salto sobre a mecânica da marcha e a carga articular de indivíduos com osteoartrite de joelho / Influence of flexible footwear and without heel on the gait mechanics and joint loading in individuals with knee osteoarthritis
The literature has been given evidences that the use of flexible and non-heeled footwear that reproduces the kinematic and kinetic characteristics of barefoot gait may reduce the joint loads and the progression of the knee osteoarthritis (OA). The purpose of this study was to evaluate and compare the influence of the acute use of flexible, non-heeled and ine
Publicado em: 2010
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4. On hydromagnetic channel flow of an Oldroyd-B fluid induced by rectified sine pulses
The unsteady unidirectional motion of an incompressible electrically conducting Oldroyd-B fluid in a channel bounded by two infinite rigid non-conducting parallel plates in presence of an external magnetic field acting in a direction normal to the plates has been discussed in this paper. The flow is supposed to generate impulsively from rest due to rectified
Computational & Applied Mathematics. Publicado em: 2009
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5. Caracterização da coordenação dos membros inferiores e avaliação dos efeitos de um treino da marcha em esteira com aumento de carga em sujeitos com doença de Parkinson
The influence of the Parkinsons disease (DP) on lower limbs coordination during walking is still not completely known. The intra and interlimb coordination are essential during walking and an impairment in the motor control may affect them. On the other hand, studies about the effects of walking training with additional body load in PD are lacking. There is
Publicado em: 2009
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6. MODELAGEM E SIMULAÇÃO DA DINÂMICA DE BÓIAS DE SUPERFÍCIE ANCORADAS / MODELING AND SIMULATION OF THE DYNAMIC OF SURFACE MOORED BUOYS
In this work a method for two-dimensional dynamic analysis of a cylindrical buoy under surfaced waves and moored to the seafloor by a flexible riser is presented. The finite element model used to describe the dynamics of the maritime line was developed by Lustosa (2002). This is a two node beam element based on the Euler-Bernoulli theory, with the element ki
Publicado em: 2008
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7. On hydromagnetic rotating flow of a dusty fluid near a pulsating plate
An initial value problem is solved for the motion of an incompressible viscous conducting fluid with embedded small inert spherical particles bounded by an infinite rigid non-conducting plate. Both the plate and the fluid are in a state of solid-body rotation with constant angular velocity about an axis normal to the plate. The unsteady flow is generated in
Computational & Applied Mathematics. Publicado em: 2008
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8. Loucura e cultura: cartografias da extensão de uma clínica poética
This research approaches madness as a complex question which permeates the everyday life and articulates with questions other than those ones of conceptions and practices that put it only in the mental health perspective. Some artistic works which take the risk of inaugurating a new conception of madness allow putting into question some clichés and standard
Publicado em: 2008
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9. BIFUEL CONVERSION OF THERMAL POWER PLANTS UNDER UNCERTAINTY: A REAL OPTIONS APPROACH / CONVERSÃO DE TERMELÉTRICAS PARA BI-COMBUSTÍVEL EM AMBIENTE DE INCERTEZA: UMA ABORDAGEM POR OPÇÕES REAIS
In Brazil, despite the predominant participation of hydro power plants, some years ago, due to Thermo Power Priority Program (PPT), a large number of Natural Gaspowered plants were implanted. A lot of uncertainties are imposed to the players in the Brazilian Power Market, and one more risk arises: the Natural Gas offer. The bi-fuel conversion arises as an op
Publicado em: 2008
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10. Modelagem matemática de interação fluido-estrutura utilizando o método da fronteira imersa / Mathematical Modeling of Fluid-Structure Interaction by Using the Immersed Boundary Method
Os problemas práticos de engenharia que envolvem a presença de escoamentos incompressíveis em torno de corpos rombudos são considerados os mais estudados. Os corpos rombudos sofrem carregamentos fluidodinâmicos causados pela geração de vórtices, que induzem o movimento oscilatório dos mesmos. A vibração induzida por vórtices tem sido objeto de es
Publicado em: 2008
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11. Estudo do acoplamento efetivo entre duas particulas brownianas quanticas / Study of effective coupling between two quantum Brownian particles
We use the system-plus-reservoir model to study the dynamics of a system of two particles that interact with a heat bath in thermal equilibrium, but do not interact with each other. We present an extension of the bath of oscillators capable of inducing an effective coupling between the brownian particles depending on the choice made to the spectral function
Publicado em: 2006
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12. PROTEÇÃO DE RECEPTORES DE ENLACES TERRESTRES CONTRA A INTERFERÊNCIA GERADA POR SATÉLITES EM ÓRBITAS ALTAMENTE INCLINADAS / PROTECTION OF FIXED SERVICE RECEIVERS FROM THE INTERFERENCE GENERATED BY HIGHLY INCLINED ORBIT SATELLITES
The protection of Fixed Service receivers from the interference produced by others communications systems is guaranteed, in some frequency band, by some constraints to be satisfied the cumulative probability distribution function of the ratio interference-to-thermal noise, I=N. To make sure that these constraints are satisfied, limits are imposed to the inte
Publicado em: 2005