1,721,016 research outputs found
Democracy, Republicanism and Constitution in Corsica (1755-1768)
No full textNell’articolo sono stati discussi alcuni aspetti del processo di costituzione dello Stato nazionale avviato nel XVIII secolo in Corsica, con particolare riferimento all’esperienza rappresentata dalla rivoluzione nazionale capeggiata da Pasquale Paoli ed al tentativo di costituire un’entità statuale indipendente dotata dei caratteri distintivi del moderno Stato nazionale (costituzione, moneta, marina commerciale e militare, ecc.)
Discrete- and Continuous-Time Random Walks in 1D Lévy Random Medium
Full text linkA Lévy random medium, in a given space, is a random point process where the distances between points, a.k.a. targets, are long-tailed. Random walks visiting the targets of a Lévy random medium have been used to model many (physical, ecological, social) phenomena that exhibit superdiffusion as the result of interactions between an agent and a sparse, complex environment. In this note we consider the simplest non-trivial Lévy random medium, a sequence of points in the real line with i.i.d. long-tailed distances between consecutive targets. A popular example of a continuous-time random walk in this medium is the so-called Lévy-Lorentz gas. We give an account of a number of recent theorems on generalizations and variations of such model, in discrete and continuous time
Continuous-time random walk between Lévy-spaced targets in the real line
Full text linkWe consider a continuous-time random walk which is defined as an interpolation of a random walk on a point process on the real line. The distances between neighboring points of the point process are i.i.d. random variables in the normal domain of attraction of an α-stable distribution with 0<1. This is therefore an example of a random walk in a Lévy random medium. Specifically, it is a generalization of a process known in the physical literature as Lévy–Lorentz gas. We prove that the annealed version of the process is superdiffusive with scaling exponent 1∕(α+1) and identify the limiting process, which is not càdlàg. The proofs are based on the technique of Kesten and Spitzer for random walks in random scenery
Global observables for RW: Law of large numbers
Full text linkWe consider the sums TN = Nn=1N F(Sn) where Sn is a random walk on Zd and F : Zd → R is a global observable, that is, a bounded function which admits an average value when averaged over large cubes. We show that TN always satisfies the weak Law of Large Numbers but the strong law fails in general except for one dimensional walks with drift. Under additional regularity assumptions on F, we obtain the Strong Law of Large Numbers and estimate the rate of convergence. The growth exponents which we obtain turn out to be optimal in two special cases: for quasiperiodic observables and for random walks in random scenery
Codici morali e uso pubblico della storia. Il Risorgimento "tradito" dei repubblicani (1943-1946)
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Il Risorgimento degli anarchici italiani (1944-1946)
No full textIl lavoro mira a ricostruire alcuni aspetti della cultura anarchica nel periodo compreso tra il 1944 e il 1946. In particolare, analizza il peso dei miti repubblicani e del mazzinianesimo in ambito anarchico e la mancanza al suo interno di una riflessione autenticamente antistatual
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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