Nonextensive Statistical Mechanics
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. O papel do código estereoquímico e das flutuações térmicas locais no processo de folding de proteínas / The role of stereochemical code and local thermal fluctuation in the protein folding process
O problema do folding de proteínas tem sido investigado intensamente há mais de sessenta anos. Entretanto ainda não é encontrado na literatura um modelo que seja capaz de explicar plenamente qual é o mecanismo responsável pelo processo de folding. Neste contexto, a presente tese de doutorado é uma proposta minimalista para investigar o papel de um có
Publicado em: 2011
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2. Generalised cascades
In this manuscript we give thought to the aftermath on the stable probability density function when standard multiplicative cascades are generalised cascades based on the q-product of Borges that emerged in the context of non-extensive statistical mechanics.
Brazilian Journal of Physics. Publicado em: 2009-08
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3. q-distributions in complex systems: a brief review
The nonextensive statistical mechanics proposed by Tsallis is today an intense and growing research field. Probability distributions which emerges from the nonextensive formalism(q-distributions) have been applied to an impressive variety of problems. In particular, the role of q-distributions in the interdisciplinary field of complex systems has been expand
Brazilian Journal of Physics. Publicado em: 2009-08
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4. A nonextensive method for spectroscopic data analysis with artificial neural networks
In this paper we apply an evolving stochastic method to construct simple and effective Artificial Neural Networks, based on the theory of Tsallis statistical mechanics. Our aim is to establish an automatic process for building a smaller network with high classification performance. We aim to assess the utility of the method based on statistical mechanics for
Brazilian Journal of Physics. Publicado em: 2009-08
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5. Modeling long-memory processes by stochastic difference equations and superstatistical approach
It is shown that the Poissonian-like process with slowly diffusing-like time-dependent average interevent time may be represented as the superstatistical one and exhibits 1/ f noise. The distribution of the Poissonian-like interevent time may be expressed as q-exponential distribution of the Nonextensive Statistical Mechanics.
Brazilian Journal of Physics. Publicado em: 2009-08
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6. Some properties of deformed q-numbers
Nonextensive statistical mechanics has been a source of investigation in mathematical structures such as deformed algebraic structures. In this work, we present some consequences of q-operations on the construction of q-numbers for all numerical sets. Based on such a construction, we present a new product that distributes over the q-sum. Finally, we present
Brazilian Journal of Physics. Publicado em: 2009-08
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7. Nonextensive statistical mechanics applied to protein folding problem: kinetics aspects
A reduced (stereo-chemical) model is employed to study kinetic aspects of globular protein folding process, by Monte Carlo simulation. Nonextensive statistical approach is used: transition probability p i j between configurations i → j is given by p i j =[1 +(1 - q)ΔGi j/kB T ]1/(1-q), where q is the nonextensive (Tsallis) parameter. The system model cons
Brazilian Journal of Physics. Publicado em: 2009-08
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8. Nonadditive entropy and nonextensive statistical mechanics -an overview after 20 years
Statistical mechanics constitutes one of the pillars of contemporary physics. Recognized as such - together with mechanics (classical, quantum, relativistic), electromagnetism and thermodynamics -, it is one of the mandatory theories studied at virtually all the intermediate-and advanced-level courses of physics around the world. As it normally happens with
Brazilian Journal of Physics. Publicado em: 2009-08
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9. Introducing the q-Theil index
Starting from the idea of Tsallis on non-extensive statistical mechanics and the q-entropy notion, we recall the Theil index Th and transform it into the Th q index. Both indices can be used to map onto themselves any time series in a non linear way. We develop an application of the Th q to the GDP evolution of 20 rich countries in the time interval [1950 -2
Brazilian Journal of Physics. Publicado em: 2009-08
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10. Estatística não-extensiva aplicada ao cálculo do calor específico eletrônico em estruturas quasiperiódicas
Sistemas cujos espectros são fractais ou multifractais têm sido bastante estudados nos últimos anos. O entendimento completo do comportamento de muitas propriedades físicas destes sistemas ainda está longe de ser completamente efetivado devido á complexidade dos próprios sistemas. Desta maneira, novas aplicações e novos métodos de estudo dos seus e
Publicado em: 2008
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11. Um estudo sobre características do subdomínio inercial da turbulência desenvolvida em escoamento acima e dentro da copa da Floresta Amazônica de terra firme e acima do Pantanal Matogrossense / An study about statistical characteristics of inertial subrange of developed turbulence in flows above and below of Amazonia Forest canopy and above Pantanal Matogrossense
In this work turbulent data measured in two micrometeorologicaly different regions, sampled at 60 Hz, were used. The first data set was obtained at a tower in the Rebio-Jaru Reserve, during an intensive campaign of the Large Scale Biosphere Atmosphere Experiment in Amazonia - (LBA) in 1999. The second set was obtained in the Pantanal Matogrossense, Interdisc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2002
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12. Nonextensive statistical mechanics: a brief review of its present status
Revisamos sumariamente o estado presente da mecânica estatística não-extensiva. Focalizamos em (i) as equacões centrais do formalismo; (ii) as aplicações mais recentes na física e em outras ciências, (iii) a determinação a priori (da dinâmica microscópica) do índice entrópico q para duas classes importantes de sistemas físicos, a saber, mapas
Anais da Academia Brasileira de Ciências. Publicado em: 2002-09