Invariant Measures
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Scale of Positive and Negative Affects (EAPN-10): Evidence of its Psychometric Adequacy
Resumo Este estudo objetivou reunir evidências psicométricas da Escala de Afetos Positivos e Negativos (EAPN-10) no contexto brasileiro. Realizaram-se três estudos. O Estudo 1 considerou 296 estudantes universitários (MIdade = 23,8; 59,1% mulheres), os quais responderam a EAPN-10 e perguntas demográficas. A análise fatorial exploratória revelou uma es
Trends Psychol.. Publicado em: 2019-01
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2. CALCULUS OF AFFINE STRUCTURES AND APPLICATIONS FOR ISOSURFACES / CÁLCULO DE ESTRUTURAS AFINS E APLICAÇÃO ÀS ISOSSUPERFÍCIES
Differential Geometry provides a set of measures invariant under a set of transformations, in particular rigid, affine, and projective. The invariants by rigid motions are using almost all applications of computer graphics and geometric modeling. The affine case, since it is more general, allows to extend these tools. In this work, geometric properties are p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
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3. Lyapunov minimizing measures for expanding maps of the circle
We consider the set of maps f є Fα+=Uβ >αC1β of the circle which are covering maps of degree D, expanding, minxєS1 f ¹(x) > 1 and orientation preserving. We are interested in characterizing the set of suchmaps f which admit a unique f -invariant probability measure _ minimizing ∫1n f ¹ d µ over all f -invariant probability measures. We show there
Publicado em: 2011
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4. Absolutely continuous invariant mesures for a class of affine interval exchange maps
We consider a class A of affine interval exchange maps of the interval and we analyse several ergodic properties of the elements of this class, among them the existence of absolutely continuous invariant probability measures. The maps of this class are parametrised by two values a and b , where a , b є (0, 1) . There is a renormalization map T defined from
Publicado em: 2011
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5. Julia sets are uniformly perfect
We prove that Julia sets are uniformly perfect in the sense of Pommerenke (Arch. Math. 32 (1979), 192-199). This implies that their linear density of logarithmic capacity is strictly positive, thus implying that Julia sets are regular in the sense of Dirichlet. Using this we obtain a formula for the entropy of invariant harmonic measures on Julia sets. As a
Publicado em: 2011
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6. Nonlinear optimum model following control of flexible aircraft.
This Doctorate Thesis concerns optimum control of flexible aircraft. Models of a conceptual flexible aircraft are developed for control applications. A general model following problem via output feedback is developed and applied to the conceptual aircraft. The models are determined for 3 aircraft variants with increasing flexibility. The aerodynamics of flex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2010
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7. Nonlinear optimum model following control of flexible aircraft.
This Doctorate Thesis concerns optimum control of flexible aircraft. Models of a conceptual flexible aircraft are developed for control applications. A general model following problem via output feedback is developed and applied to the conceptual aircraft. The models are determined for 3 aircraft variants with increasing flexibility. The aerodynamics of flex
Publicado em: 2010
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8. NONLINEAR DYNAMICS, INSTABILITY AND CONTROL OF STRUCTURAL SYSTEMS WITH MODAL INTERACTION / DINÂMICA NÃO-LINEAR, INSTABILIDADE E CONTROLE DE SISTEMAS ESTRUTURAIS COM INTERAÇÃO MODAL
The aim of this thesis is to study the influence of coupled buckling modes on the static and particularly on the nonlinear dynamic behavior of structural components liable to buckling. For this, two discrete two degrees of freedom models known for their complex nonlinear behavior are selected: the well-known Augusti¿s model and a simplified model of cable-s
Publicado em: 2010
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9. Análise psicofísica de medidas subjetivas de tempo em contexto rítmico / Psychophysical analysis of subjective measures of time in rhythmic context
Purpose: To study mechanisms that limit the accuracy of rhythm production and sensorimotor synchronization analyzing the variability in finger tapping tasks, be they spontaneous finger tapping, sensorimotor synchronization to external metronomes, or rhythm maintenance after turning off the external metronome. Methods: A total of 11 participants (mean age ±
Publicado em: 2010
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10. Generalizations of the Riesz Representation Theorem / Generalizações do teorema de representação de Riesz
Dados um espaço de medida (X;A;m) e números reais p,q>1 com 1/p+1/q=1, o Teorema de Representação de Riesz afirma que Lq(X;A;m) é o dual topológico de Lp(X;A;m) e que Loo(X;A; m) é o dual topológico de L1(X;A;m) se o espaço (X;A;m) for sigma-finito. Observamos que a sigma-finitude de (X;A;m) é condição suficiente mas não necessária para que Loo
Publicado em: 2009
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11. Consistência e variabilidade do nado crawl em indivíduos habilidosos / Consistency and variability in the crawl swim of skillful individuals
When observing the movements of skillful individuals practicing sport, one might suppose that they are a repetition of a series of identical movements. However, what seems to be identical in a skillful motor behavior from a general macroscopic view, is, in fact, variable when observed in detail. Skillful motor behavior presents invariant aspects that result
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/03/2008
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12. DIFEOMORFISMOS DE SUPERFÍCIE COM MEDIDAS INVARIANTES NÃO-TRIVIAIS / SURFACE DIFFEOMORPHISMS WITH NON-TRIVIAL INVARIANT MEASURES
Alguns difeomorfismos de superfícies fechadas possuem apenas medidas invariantes triviais, isto é, medidas cujo suporte está contido no conjunto de pontos fixos. Resultados dessa natureza fazem uso fundamental da classificação dos homeomorfismos de superfície, tornando-os típicos da dimensão 2. Nós atacamos esse problema mostrando que difeomorfismos
Publicado em: 2008