12 results match your criteria: "Suc Centre-Ville[Affiliation]"

Multiscale Thermodynamics.

Entropy (Basel)

January 2021

École Polytechnique de Montréal, C.P.6079 suc. Centre-Ville, Montréal, QC H3C 3A7, Canada.

Multiscale thermodynamics is a theory of the relations among the levels of investigation of complex systems. It includes the classical equilibrium thermodynamics as a special case, but it is applicable to both static and time evolving processes in externally and internally driven macroscopic systems that are far from equilibrium and are investigated at the microscopic, mesoscopic, and macroscopic levels. In this paper we formulate multiscale thermodynamics, explain its origin, and illustrate it in mesoscopic dynamics that combines levels.

View Article and Find Full Text PDF

Dynamic and Renormalization-Group Extensions of the Landau Theory of Critical Phenomena.

Entropy (Basel)

September 2020

Mathematical Institute, Faculty of Mathematics, Charles University, Sokolovská 83, 18675 Prague, Czech Republic.

We place the Landau theory of critical phenomena into the larger context of multiscale thermodynamics. The thermodynamic potentials, with which the Landau theory begins, arise as Lyapunov like functions in the investigation of the relations among different levels of description. By seeing the renormalization-group approach to critical phenomena as inseparability of levels in the critical point, we can adopt the renormalization-group viewpoint into the Landau theory and by doing it bring its predictions closer to results of experimental observations.

View Article and Find Full Text PDF

Gradient and GENERIC time evolution towards reduced dynamics.

Philos Trans A Math Phys Eng Sci

May 2020

Mathematical Institute, Faculty of Mathematics, Charles University, Sokolovská 83, Prague 18675, Czech Republic.

Reduction of a mesoscopic dynamical theory to equilibrium thermodynamics brings to the latter theory the fundamental thermodynamic relation (i.e. entropy as a function of the thermodynamic state variables).

View Article and Find Full Text PDF

Dynamic Maximum Entropy Reduction.

Entropy (Basel)

July 2019

École Polytechnique de Montréal, C.P.6079 suc. Centre-ville, Montréal, QC H3C3A7, Canada.

Any physical system can be regarded on different levels of description varying by how detailed the description is. We propose a method called Dynamic MaxEnt (DynMaxEnt) that provides a passage from the more detailed evolution equations to equations for the less detailed state variables. The method is based on explicit recognition of the state and conjugate variables, which can relax towards the respective quasi-equilibria in different ways.

View Article and Find Full Text PDF

Thermodynamic Explanation of Landau Damping by Reduction to Hydrodynamics.

Entropy (Basel)

June 2018

École Polytechnique de Montréal, C.P.6079 suc. Centre-ville, Montréal, QC H3C 3A7, Canada.

Landau damping is the tendency of solutions to the Vlasov equation towards spatially homogeneous distribution functions. The distribution functions, however, approach the spatially homogeneous manifold only weakly, and Boltzmann entropy is not changed by the Vlasov equation. On the other hand, density and kinetic energy density, which are integrals of the distribution function, approach spatially homogeneous states strongly, which is accompanied by growth of the hydrodynamic entropy.

View Article and Find Full Text PDF

Time reversal in nonequilibrium thermodynamics.

Phys Rev E Stat Nonlin Soft Matter Phys

December 2014

École Polytechnique de Montréal, C.P.6079 suc. Centre-ville, Montréal, H3C 3A7 Québec, Canada.

The general equation of nonequilibrium reversible-irreversible coupling (GENERIC) is studied in light of time-reversal transformation. It is shown that Onsager-Casimir reciprocal relations are implied by GENERIC in the near-equilibrium regime. A general structure which gives the reciprocal relations but which is valid also far from equilibrium is identified, and Onsager-Casimir reciprocal relations are generalized to far-from-equilibrium regime in this sense.

View Article and Find Full Text PDF

Mechano-chemical coupling in Belousov-Zhabotinskii reactions.

J Chem Phys

March 2014

Ecole Polytechnique de Montreal, C.P. 6079 suc. Centre-ville, Montreal, H3C 3A7 Quebec, Canada.

Mechano-chemical coupling has been recently recognised as an important effect in various systems as chemical reactivity can be controlled through an applied mechanical loading. Namely, Belousov-Zhabotinskii reactions in polymer gels exhibit self-sustained oscillations and have been identified to be reasonably controllable and definable to the extent that they can be harnessed to perform mechanical work at specific locations. In this paper, we use our theoretical work of nonlinear mechano-chemical coupling and investigate the possibility of providing an explanation of phenomena found in experimental research by means of this theory.

View Article and Find Full Text PDF

Provoked vestibulodynia: psychological predictors of topical and cognitive-behavioral treatment outcome.

Behav Res Ther

February 2010

Université du Québec à Montréal, Montréal, Department of Psychology, C.P. 8888, Suc. Centre-Ville, Montréal, QC H3C 3P8, Canada.

Psychological factors have been found to impact the pain experience and associated sexual impairment of women suffering from provoked vestibulodynia (PV). Despite a lack of randomized treatment outcome studies, particularly concerning psychological predictors of outcome, recent studies have shown that topical applications and cognitive-behavioral therapy (CBT) are among the most popular first-line interventions for PV. The present study aimed to determine the extent to which baseline fear-avoidance variables and pain self-efficacy were differentially associated with topical application and CBT outcomes at six-month follow-up.

View Article and Find Full Text PDF

The emergence and evolution of the expression "conflict of interests" in science: a historical overview, 1880--2006.

Sci Eng Ethics

September 2008

Centre Interuniversitaire de Recherche sur la Science et la Technologie, Université du Québec a Montréal, Suc Centre-Ville, C.P. 8888, Montreal, QC, Canada, H3C 3P8.

The tendency is strong to take the notion of "conflict of interests" for granted as if it had an invariant meaning and an ethical content independent of the historical context. It is doubtful however, from an historical and sociological point of view, that many of the cases now considered as instances of "conflicts of interests" would also have been conceived and perceived as such in, say, the 1930s. The idea of a "conflict of interests" presupposes that there are indeed interests in conflict.

View Article and Find Full Text PDF

Motivation: High-throughput screening (HTS) plays a central role in modern drug discovery, allowing for testing of >100,000 compounds per screen. The aim of our work was to develop and implement methods for minimizing the impact of systematic error in the analysis of HTS data. To the best of our knowledge, two new data correction methods included in HTS-Corrector are not available in any existing commercial software or freeware.

View Article and Find Full Text PDF

Effects of Cu on plasma cortisol and cortisol secretion by adrenocortical cells of rainbow trout (Oncorhynchus mykiss).

Aquat Toxicol

June 2006

Département des Sciences Biologiques, TOXEN Research Centre, Université du Québec à Montréal, C.P. 8888, Suc. Centre-ville, Montréal, Que., Canada H3C 3P8.

Fish are exposed to multiple stressors, often acting concurrently, in their environment. To evaluate the potential of Cu to act as a chemical stressor, rainbow trout (Oncorhynchus mykiss) were exposed to Cu (30 or 80 microg/l) for 30 days in the laboratory and they were subjected to a physical stressor (1 min air exposure) before sampling. Physiological stress indicators in the whole fish as well as cortisol secretion by adrenocortical cells in vitro were measured.

View Article and Find Full Text PDF

Frequency-dependent selection in sexual family-structured populations.

J Theor Biol

August 2002

Department of Mathematics and Statistics, University of Montreal, C.P. 6128, Suc. Centre-Ville, Montreal, Quebec, H3C 3J7, Canada.

In this paper, a two-phenotype, single-locus, n -allele matrix game diploid model incorporating interactions between full sibs influencing personal fitness is investigated. Necessary and sufficient conditions for an ESS are given. We show that if a strategy is an ESS for this model with the payoff matrix A, then it must be an ESS for the standard game formulation with payoff matrix A+(r/2) A(T) where r is the probability to interact with a sib, but it is also possible that no ESS exists.

View Article and Find Full Text PDF