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Search Results: 1 - 10 of 167643 matches for " E. Presutti "
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Thermodynamic limit for isokinetic thermostats
G. Gallavotti,E. Presutti
Physics , 2009, DOI: 10.1063/1.3376659
Abstract: Thermostats models in space dimension $d=1,2,3$ for nonequilibrium statistical mechanics are considered and it is shown that, in the thermodynamic limit, the motions of frictionless thermostats and isokinetic thermostats coincide.
Frictionless thermostats and intensive constants of motion
G. Gallavotti,E. Presutti
Physics , 2009, DOI: 10.1007/s10955-010-9949-8
Abstract: Thermostats models in space dimension d=1,2,3 for nonequilibrium statistical mechanics are considered and it is shown that, in the thermodynamic limit, the evolutions admit infinitely many constants of motion: namely the intensive observables.
Thermodynamic limit of Isoenergetic and Hamiltonian Thermostats
G. Gallavotti,E. Presutti
Physics , 2009,
Abstract: The relation between isoenergetic and Hamiltonian thermostats is studied and their equivalence in the thermodynamic limit is proved in space dimension $d=1,2$. v.2: W_n and x_n replace W and x where needed
Liquid-Vapor Phase Transitions for Systems with Finite Range Interactions
J. L. Lebowitz,A. Mazel,E. Presutti
Physics , 1998, DOI: 10.1023/A:1004591218510
Abstract: We consider particles in $\R^d, d \geq 2$ interacting via attractive pair and repulsive four-body potentials of the Kac type. Perturbing about mean field theory, valid when the interaction range becomes infinite, we prove rigorously the existence of a liquid-gas phase transition, when the interaction range is finite but long compared to the interparticle spacing for a range of temperature.
Rigorous Proof of a Liquid-Vapor Phase Transition in a Continuum Particle System
J. L. Lebowitz,A. E. Mazel,E. Presutti
Physics , 1998, DOI: 10.1103/PhysRevLett.80.4701
Abstract: We consider particles in ${\Bbb R}^d, d \geq 2$, interacting via attractive pair and repulsive four-body potentials of the Kac type. Perturbing about mean field theory, valid when the interaction range becomes infinite, we prove rigorously the existence of a liquid-gas phase transition when the interaction range is finite but long compared to the interparticle spacing.
Mapas Conceptuales como Herramienta en la Ense?anza de Contenidos Comunes a Diferentes Cursos de Ingeniería Agronómica
Presutti,Miriam E; Miceli,Elisa C; Laporte,Gladys M;
Formación universitaria , 2009, DOI: 10.4067/S0718-50062009000600006
Abstract: in this work the advantages of using concept maps as a tool in covering the same subjects in different courses of agronomy engineering are shown. the selected topic to construct the concept map is the fusarium ear blight (feb), a fungal disease that affects ear wheat and it appears with particular environmental conditions. the concept map of feb was developed using the concepts extracted from the textbooks used in different courses and applying the software cmaptools. finally, the map was exported to web page format so all the students could access it from their own computer. it is concluded that using the concept map at the beginning of the class in each course where the selected concept is treated, students can get a global vision of it, to then deal with the specific subjects of the course in depth.
Geometry of contours and Peierls estimates in d=1 Ising models
M. Cassandro,P. A. Ferrari,I. Merola,E. Presutti
Mathematics , 2002, DOI: 10.1063/1.1897644
Abstract: Following Fr\"ohlich and Spencer, we study one dimensional Ising spin systems with ferromagnetic, long range interactions which decay as $|x-y|^{-2+\alpha}$, $0\leq \alpha\leq 1/2$. We introduce a geometric description of the spin configurations in terms of triangles which play the role of contours and for which we establish Peierls bounds. This in particular yields a direct proof of the well known result by Dyson about phase transitions at low temperatures.
Potts models in the continuum. Uniqueness and exponential decay in the restricted ensembles
A. De Masi,I. Merola,E. Presutti,Y. Vignaud
Mathematics , 2008, DOI: 10.1007/s10955-008-9603-2
Abstract: In this paper we study a continuum version of the Potts model. Particles are points in R^d, with a spin which may take S possible values, S being at least 3. Particles with different spins repel each other via a Kac pair potential. In mean field, for any inverse temperature there is a value of the chemical potential at which S+1 distinct phases coexist. For each mean field pure phase, we introduce a restricted ensemble which is defined so that the empirical particles densities are close to the mean field values. Then, in the spirit of the Dobrushin Shlosman theory, we get uniqueness and exponential decay of correlations when the range of the interaction is large enough. In a second paper, we will use such a result to implement the Pirogov-Sinai scheme proving coexistence of S+1 extremal DLR measures.
Toward a Greater Discourse: Issues in Religious Archives
Robert Presutti
Theological Librarianship , 2010,
Abstract: The topic of religious archives, a catalyst of much discussion in archival literature, has traditionally been overlooked within the discourse of the American Theological Library Association (ATLA). This essay provides a survey analysis of three pertinent issues in religious archives with the intention of generating a wider discussion on religious archives within ATLA. These issues include the role of graduate archival education, the effects of religious faith on both the archival record and the individual archivist, and the idea of a theology of archives. An extended review of the contributions of James O’Toole to the discussion of religious archives is utilized.
Nonequilibrium, thermostats and thermodynamic limit
Giovanni Gallavotti,Errico Presutti
Physics , 2009, DOI: 10.1063/1.3257618
Abstract: The relation between thermostats of "isoenergetic" and "frictionless" kind is studied and their equivalence in the thermodynamic limit is proved in space dimension $d=1,2$ and, for special geometries, $d=3$.
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