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We present a detailed description of an algorithm tailored to detect external plagiarism in PAN-09 competition. The algorithm is divided into three steps: a first reduction of the size of the problem by a selection of ten suspicious plagiarists using a n-gram distance on properly recoded texts. A search for matches after T9-like recoding. A “joining… (More)

- Eduardo G. Altmann, Giampaolo Cristadoro, Mirko Degli Esposti
- Proceedings of the National Academy of Sciences…
- 2012

The complexity of human interactions with social and natural phenomena is mirrored in the way we describe our experiences through natural language. In order to retain and convey such a high dimensional information, the statistical properties of our linguistic output has to be highly correlated in time. An example are the robust observations, still largely… (More)

- G Cristadoro, R Ketzmerick
- Physical review letters
- 2008

Hamiltonian systems with a mixed phase space typically exhibit an algebraic decay of correlations and of Poincaré recurrences, with numerical experiments over finite times showing system-dependent power-law exponents. We conjecture the existence of a universal asymptotic decay based on results for a Markov tree model with random scaling factors for the… (More)

- Giulia Paci, Giampaolo Cristadoro, +4 authors Daniel Remondini
- Philosophical transactions. Series A…
- 2016

We perform a statistical study of the distances between successive occurrences of a given dinucleotide in the DNA sequence for a number of organisms of different complexity. Our analysis highlights peculiar features of the CG dinucleotide distribution in mammalian DNA, pointing towards a connection with the role of such dinucleotide in DNA methylation.… (More)

- Giampaolo Cristadoro, Marco Lenci, Marcello Seri
- Chaos
- 2010

We consider the billiard dynamics in a striplike set that is tessellated by countably many translated copies of the same polygon. A random configuration of semidispersing scatterers is placed in each copy. The ensemble of dynamical systems thus defined, one for each global choice of scatterers, is called quenched random Lorentz tube. We prove that under… (More)

Abstract. Dynamical zeta functions provide a powerful method to analyze low dimensional dynamical systems when the underlying symbolic dynamics is under control. On the other hand even simple one dimensional maps can show an intricate structure of the grammar rules that may lead to a non smooth dependence of global observable on parameters changes. A… (More)

- G Cristadoro, D L Shepelyansky
- Physical review. E, Statistical, nonlinear, and…
- 2005

An ensemble of particles in thermal equilibrium at temperature T, modeled by Nosè-Hoover dynamics, moves on a triangular lattice of oriented semidisk elastic scatterers. Despite the scatterer asymmetry, a directed transport is clearly ruled out by the second law of thermodynamics. Introduction of a polarized zero mean monochromatic field creates a directed… (More)

- Giampaolo Cristadoro, Thomas Gilbert, Marco Lenci, David P Sanders
- Physical review. E, Statistical, nonlinear, and…
- 2014

We perform numerical measurements of the moments of the position of a tracer particle in a two-dimensional periodic billiard model (Lorentz gas) with infinite corridors. This model is known to exhibit a weak form of superdiffusion, in the sense that there is a logarithmic correction to the linear growth in time of the mean-squared displacement. We show… (More)

We consider a deterministic realization of Parrondo games, and use periodic orbit theory to analyze their asymptotic behavior.