189,110 research outputs found
A. Poggi, Cultura e socialismo
No full textDecerf Paul. A. Poggi, Cultura e socialismo. In: Revue Philosophique de Louvain. Troisième série, tome 56, n°50, 1958. p. 340
Poggi (Gianfranco) Il Clero di riserva
No full textPoulat Emile. Poggi (Gianfranco) Il Clero di riserva. In: Archives de sociologie des religions, n°20, 1965. p. 198
Poggi (Gianfranco) Il Clero di riserva
No full textPoulat Emile. Poggi (Gianfranco) Il Clero di riserva. In: Archives de sociologie des religions, n°20, 1965. p. 198
Exact solutions in the FPU oscillator chain
No full textAfter a brief comprehensive review of old and new results on the well-known Fermi-Pasta-Ulam (FPU) conservative system of N nonlinearly coupled oscillators, we present a compact linear mode representation of the Hamiltonian of the FPU system with quartic nonlinearity and periodic boundary conditions, with explicitly computed mode coupling coefficients. The core of the paper is the proof of the existence of one- and two-mode exact solutions, physically representing nonlinear standing and travelling waves of small wavelength whose explicit lattice representations are obtained, and which are valid also as N → ∞. Moreover, and more generally, we show the presence of multi-mode invariant submanifolds. The full mode-space stability problem of the anharmonic zone-boundary mode is solved, showing that this mode becomes unstable through a mechanism of the modulational Benjamin-Feir type. In the thermodynamic limit the mode is always unstable but with instability growth rate linearly vanishing with energy density. The physical significance of these solutions and of their stability properties, with respect to the previously much more studied equipartition problem for long wavelength initial excitations, is briefly discussed. Copyright © 1997 Elsevier Science B.V. All rights reserved
Fatone, Vicente: Obras Completas T. I. Ensayos sobre hinduismo y budismo. Editorial Sudamericana, Buenos Aires, 1972, 395 p.
No full textFil: Poggi de Lucero, María Haydée
Gaetano Poggi, Genova preromana, romana e medioevale, 1914
No full textJullian Camille. Gaetano Poggi, Genova preromana, romana e medioevale, 1914. In: Revue des Études Anciennes. Tome 17, 1915, n°3. p. 232
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