Search results for "canto"

Ciudades creativas y pueblos con encanto: los nuevos procesos patrimoniales del siglo XXI

2017

Durante las últimas décadas hemos asistido a un crecimiento espectacular del fenómeno patrimonial. La eclosión patrimonial, entre otras cosas, puede ser leída como una cara más del tercer espíritu del capitalismo. El desembarco de la economía de los intangibles y el acento en la producción del valor de lo inmaterial ha cambiado las reglas del juego de la economía mundial. Nuestra hipótesis de partida es que hemos asistido a una importante transformación en las activaciones patrimoniales: del nacionalismo político, que impulsó el patrimonio colectivo en el XIX, hemos pasado al nacionalismo de consumo en el siglo XXI. En este contexto, este artículo analiza el distinto impacto que tienen los …

Latinoamérica y Vargas Llosa / 2

2006

Vidal-Beneyto y García Trevijano. Un cierto desencanto.

1977

Vidal-Beneyto y García Trevijano. Un cierto desencanto

1977

A las armas con las armas

1981

Self-similar focusing with generalized devil's lenses

2011

[EN] We introduce the generalized devil's lenses (GDLs) as a new family of diffractive kinoform lenses whose structure is based on the generalized Cantor set. The focusing properties of different members of this family are analyzed. It is shown that under plane wave illumination the GDLs give a single main focus surrounded by many subsidiary foci. It is shown that the total number of subsidiary foci is higher than the number of foci corresponding to conventional devil's lenses; however, the self-similar behavior of the axial irradiance is preserved to some extent. (C) 2011 Optical Society of America

Undergraduate experiment with fractal diffraction gratings

2011

We present a simple diffraction experiment with fractal gratings based on the triadic Cantor set. Diffraction by fractals is proposed as a motivating strategy for students of optics in the potential applications of optical processing. Fraunhofer diffraction patterns are obtained using standard equipment present in most undergraduate physics laboratories and compared with those obtained with conventional periodic gratings. It is shown that fractal gratings produce self-similar diffraction patterns which can be evaluated analytically. Good agreement is obtained between experimental and numerical results. © 2011 IOP Publishing Ltd.

Resonance between Cantor sets

2007

Let $C_a$ be the central Cantor set obtained by removing a central interval of length $1-2a$ from the unit interval, and continuing this process inductively on each of the remaining two intervals. We prove that if $\log b/\log a$ is irrational, then \[ \dim(C_a+C_b) = \min(\dim(C_a) + \dim(C_b),1), \] where $\dim$ is Hausdorff dimension. More generally, given two self-similar sets $K,K'$ in $\RR$ and a scaling parameter $s>0$, if the dimension of the arithmetic sum $K+sK'$ is strictly smaller than $\dim(K)+\dim(K') \le 1$ (``geometric resonance''), then there exists $r<1$ such that all contraction ratios of the similitudes defining $K$ and $K'$ are powers of $r$ (``algebraic resonance…

Difract: Un nuevo laboratorio virtual para la modelización matemática de las propiedades de difracción de redes fractales

2011

[EN] This work presents a new virtual laboratory, Difract, developed with Easy Java Simulations, for using in Optics courses as a computer tool for the mathematical modelling of the diffraction properties of 1D and 2D fractal gratings. This virtual laboratory enables students to quickly and easily analyze the influence on the Fraunhofer diffraction pattern of the different construction parameters of the fractal grating. As an application example, the Cantor fractal set has been considered.

Nouvelles découvertes sur le site du Mormont (Vaud, Suisse, campagnes 2012-2015)

2016

National audience