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Solitones no autónomos en fibras ópticas
(Sociedad Mexicana de Física, A.C., 2015)
"Soluciones solitónicas de las ecuaciones de Schrôdinger no lineales de coeficientes variables que describen muchas situaciones reales de propagación solitónica se pueden obtener usando el mapeo de ‘integrabilidad diseñada’ ...
Pseudorandom sequences in spread-spectrum communications generated by cellular automata
(Universidad Nacional Autónoma de México, 2012)
"Dynamical systems methods have been recently used in spread-spectrum digital communication systems. The expansion of the spectrum using a pseudorandom sequence with a higher frequency than the information signal is the ...
Talbot effect for dispersion in linear optical fibers and a wavelet approach
(2006)
"We shortly recall the mathematical and physical aspects of Talbot’s self-imaging effect occurring in near-field diffraction. In the rational paraxial approximation, the Talbot images are formed at distances z = p/q, where p ...
Two-dimensional DFA scaling analysis applied to encrypted images
(2015)
"The technique of detrended fluctuation analysis (DFA) has been widely used to unveil scaling properties of many different signals. In this paper, we determine scaling properties in the encrypted images by means of a ...
Wavelet multifractal detrended fluctuation analysis of encryption and decryption matrices
(2013)
"In this paper, we study in detail the multifractal features of the main matrices of an encryption system based on a rule-90 cellular automaton. For this purpose we consider the scaling method known as the wavelet transform ...
Grafeno: el alótropo más prometedor del carbono
(2012)
"Después de una breve revisión de la historia de los alótropos del carbono conocidos al momento, nos enfocamos en el más reciente de ellos, el grafeno, cuyas propiedades extraordinarias se deben a la propagación relativista ...
Improvement and analysis of a pseudo random bit generator by means of cellular automata
(2010)
"In this paper, we implement a revised pseudo random bit generator based on a rule-90 cellular automaton. For this purpose, we introduce a sequence matrix HN with the aim of calculating the pseudo random sequences of N ...
Linear second-order differential equations for barotropic FRW cosmologies
(2003)
"Simple linear second-order differential equations have been written down for FRW cosmologies with barotropic fluids by Faraoni. His results have been extended by Rosu, who employed techniques belonging to nonrelativistic ...
Matrix approach of an encryption system based on cellular automata and its numerical implementation
(2012)
"The main components of an encryption system based on rule 90 cellular automata, i.e., two indexed families of permutations and a pseudorandom bit generator are implemented in a very xible way through a convenient matrix ...
The three-step master equation: class of parametric stationary solutions
(2005)
"We examine the three-step master equation from the standpoint of the general solution of the associated discrete Riccati equation. We report by this means stationary master solutions depending on a free constant parameter, ...