Closed Surfaces
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. A New Fifth-Order Shear and Normal Deformation Theory for Static Bending and Elastic Buckling of P-FGM Beams
Abstract A new fifth-order shear and normal deformation theory (FOSNDT) is developed for the static bending and elastic buckling analysis of functionally graded beams. The properties of functionally graded material are assumed to vary through the thickness direction according to power-law distribution (P-FGM). The most important feature of the present theory
Lat. Am. j. solids struct.. Publicado em: 2017
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2. Bending, Vibration and Buckling of Laminated Composite Plates Using a Simple Four Variable Plate Theory
Abstract In the present study, a simple trigonometric shear deformation theory is applied for the bending, buckling and free vibration of cross-ply laminated composite plates. The theory involves four unknown variables which are five in first order shear deformation theory or any other higher order theories. The in-plane displacement field uses sinusoidal fu
Lat. Am. j. solids struct.. Publicado em: 2016-03
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3. Closed-form elasticity solution for three-dimensional deformation of functionally graded micro/nano plates on elastic foundation
This paper addresses the static deformation of simply supported rectangular micro/nano plates made of functionally graded (FG) materials based on the three-dimensional nonlocal elasticity theory of Eringen. The plates are assumed to be simply supported and rested on a Winkler-Pasternak elastic foundation. Elasticity modulus is assumed to obey an exponential
Lat. Am. j. solids struct.. Publicado em: 2015-08
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4. Is there a relationship between complaints of impaired balance and postural control disorder in community-dwelling elderly women? A cross-sectional study with the use of posturography
Background: Risk of falls increases as age advances. Complaints of impaired balance are very common in the elderly age group. Objectives: The objective of this study was to investigate whether the subjective perception of impaired balance was associated with deficits in postural control (objective analysis) in elderly community-dwelling women. Method: Stati
Braz. J. Phys. Ther.. Publicado em: 12/06/2015
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5. Analysis of static and dynamic balance in healthy elderly practitioners of Tai Chi Chuan versus ballroom dancing
OBJECTIVE: To determine whether Tai Chi Chuan or ballroom dancing promotes better performance with respect to postural balance, gait, and postural transfer among elderly people. METHODS: We evaluated 76 elderly individuals who were divided into two groups: the Tai Chi Chuan Group and the Dance Group. The subjects were tested using the NeuroCom Balance Maste
Clinics. Publicado em: 2015-03
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6. Thermoelastic slowness surfaces in anisotropic media with thermal relaxation
Analysis for general closed form solution of the thermoelastic waves in anisotropic heat conducting materials is obtained by using the solution technique for the biquadratic equation in the framework of the generalized theory of thermoelasticity. Obtained results are general in nature and can be applied to the materials of higher symmetry classes such as tra
Lat. Am. j. solids struct.. Publicado em: 2014
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7. Flexural analysis of cross-ply laminated beams using layerwise trigonometric shear deformation theory
In the present work, a layerwise trigonometric shear deformation theory is used for the analysis of two layered (90/0) cross ply laminated simply supported and fixed beams subjected to sinusoidal load. The displacement field of the present theory consists of trigonometric sine function in terms of thickness coordinate to take into account the effect of trans
Lat. Am. j. solids struct.. Publicado em: 2013-07
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8. Static and dynamic postural control in low-vision and normal-vision adults
OBJECTIVE: This study aimed to evaluate the influence of reduced visual information on postural control by comparing low-vision and normal-vision adults in static and dynamic conditions. METHODS: Twenty-five low-vision subjects and twenty-five normal sighted adults were evaluated for static and dynamic balance using four protocols: 1) the Modified Clinica
Clinics. Publicado em: 2013-04
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9. Um invariante para sistemas com integral primeira Morse-Bott / A invariant for systems with a Morse-Bott first integral
Nesta dissertação são investigados os sistemas diferenciais com integral primeira do tipo Morse-Bott definidos em superfícies compactas e orientáveis. A cada sistema, nas condições acima descritas, associa-se um grafo de modo que a correspondência entre os grafos e as classes de equivalência topologica orbital dos campos investigados seja bijetiva.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/08/2011
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10. Raízes de aplicações de complexos 2-dimensionais em superfícies fechadas / Roots of maps from 2-dimensional complexes into closed surfaces
This text is the result of a detailed study of the topological root theory for maps from 2-dimensional CW complex into closed surfaces (compact and without boundary surfaces). Several approaches to the problems involved in this theory are presented, some of which are quite different with respect to the parameters of the classical theory
Publicado em: 2010
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11. Presentations of surface braid groups / Apresentações dos grupos de tranças em superfícies
In this work, we find presentations for surface braid groups either in closed orientable surfaces of genus g >= 1 or in closed non-orientable surfaces of genus g >= 2. A consequence of this presentations is to solve the word problem, which consists in finding an algorithm to decide when a given word in a group defined by its generators and its relations is t
Publicado em: 2010
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12. About 3-manifolds supporting some actions of R POT. 2and a Morses conjecture / Sobre 3-variedades suportando certas ações de R POT. 2e uma Conjectura de Morse
First we consider a family of C POT. 2actions of R POT. 2on a closed 3-manifold. One of the conditions of this family is that it admits only a finite number of singular orbits, which are all diffeomorphic to circle. For this family we will give a description of the structure of the orbits as well the 3-manifolds supporting this actions. This generalizes resu
Publicado em: 2010