Nonequilibrium Thermodynamics
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Hybrid MAPbI3 Perovskite Growth Mechanism from Irregular Particles to Cuboid and Hopper-Type Morphologies
Methylammonium lead iodide (MAPbI3), used as light-harvesting layer in solar cell devices, has attracted great attention from scientific community due to its excellent photovoltaic performance. In this work, we have shown a comprehensive study on the hybrid organic-inorganic MAPbI3 perovskite growth mechanism from irregular small particles to cuboid shape fo
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Padrões de Turing em sistemas químicos
Spontaneous pattern formation in reaction-diffusion systems was theoretically proposed by Alan M. Turing in 1952. His breakthrough conceptions of chemical self-organization were able to explain how patterns emerge in nature and the symmetry breaking, which are of utmost importance, for instance, in the context of origin of life. Along with the experimental o
Quím. Nova. Publicado em: 2016-05
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3. Termodinâmica estatística de não-equilíbrio da condensação de Fröhlich-Bose-Einstein de mágnons excitados / Non-equilibrium statistical thermodynamics of the Fröhlich-Bose-Einstein condensation of hot magnons
Este trabalho tem por objetivo desenvolver uma teoria sobre a termodinâmica de não-equilíbrio de mágnons excitados por fonte externa e em contato com um banho térmico. A teoria é aplicada ao recém observado acúmulo de mágnons nos estados de mínima freqüência em experimentos com filmes finos magnetizados de granada de ferro-ítrio afastados do equ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/08/2011
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4. Desenvolvimento de modelagens de não equilibrio para caracterização e aplicação em simulação de colunas de destilação complexas / Development of nonequilibrium models for characterization and application in simulation of complex distillation columns
Distillation is, certainly, the most applied process in the separation of liquid mixtures. Although this is a very known unit operation, still nowadays some difficulties persist in the proposal of appropriate distillation schemes. Thus, the objective of this work was to apply more realistic models in the characterization of mixtures and in the simulation of
Publicado em: 2006
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5. Ensemble formalism for nonequilibrium systems and an associated irreversible statical thermodynamics
It is reviewed what can be considered as the present research trends in what regards to the construction of an ensemble formalism - Gibbs' style - for the case of far-from-equilibrium systems. The main questions involved are presented accompanied with brief discussions. The construction of a nonequilibrium statistical operator is described and its applicatio
Brazilian Journal of Physics. Publicado em: 2005-09
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6. Systems Biology: an information-theoretic-based thermo-statistical approach
Systems Biology (system-level understanding in biological science), from the physical-chemical point of view, is involved with irreversible thermodynamics and nonlinear kinetic theory of open systems which are founded on nonequilibrium statistical mechanics. We describe a modern thermo-statistical approach for dealing with complex systems, in particular biol
Brazilian Journal of Physics. Publicado em: 2004-06
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7. Considerations on nonequilibrium entropy and temperature
Several aspects of the Thermodynamics of systems away from equilibrium are considered. Particular attention is given to the question of the concepts of entropy and temperature in arbitrary nonequilibrium conditions. Even though such state function and thermodynamic variable are elusive in such conditions, it is elaborated and discussed an approach to them th
Brazilian Journal of Physics. Publicado em: 2000
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8. Complexidade em sistemas dinamicos : formalismo termodinamica e mecanico estatistico
We present a Statistical Mechanics for nonlinear systems and a Thermodynamics of irreversible processes capable to deal with the so-called complex systems. Two powerful approaches have been used, namely - Predictive Statistical Mechanics -based on Information Theory -in what consists of the Nonequilibrium Ensemble Formalism (NESOM), and Zubarev s approach is
Publicado em: 1998
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9. Modelo termodinamico para o aquecimento não-linear, a laser, e suas aplicações ao processamento de materiais
The subject of the computer modeling of the laser processing of materials continues to be highly topical in Materials Science. Basic to such an achievement was to have an well posed proposition to determine the time evolution of the temperature anywhere in the laser heated sample. Though models of such a kind abound in the literature, they are either rather
Publicado em: 1994
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10. Evolução temporal de excitações elementares em semicondutores fortemente fotoexcitados
We present a method that using a first principle theory allow us for the determination of nonlinear transport equations which describe irreversible processes in far from equilibrium systems. This method is applied to study the nonequilibrium thermodynamics and kinetics of evolution of relaxation processes in polar semiconductors under high levels of optical
Publicado em: 1982
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11. Experimental test of Hatano and Sasa's nonequilibrium steady-state equality
Most natural processes occur far from equilibrium and cannot be treated within the framework of classical thermodynamics. In 1998, Oono and Paniconi [Oono, Y. & Paniconi, M. (1998) Prog. Theor. Phys. Suppl. 130, 29–44] proposed a general phenomenological framework, steady-state thermodynamics, encompassing nonequilibrium steady states and transitions betwe
National Academy of Sciences.
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12. Thermodynamics “beyond” local equilibrium
Nonequilibrium thermodynamics has shown its applicability in a wide variety of different situations pertaining to fields such as physics, chemistry, biology, and engineering. As successful as it is, however, its current formulation considers only systems close to equilibrium, those satisfying the so-called local equilibrium hypothesis. Here we show that
The National Academy of Sciences.