<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Fractal growth from local instabilities"^^ . "We study, both with numerical simulations and theoretical methods, a cellular automata model for surface growth in the presence of a local instability, driven by an external flux of particles. The growing tip is selected with probability proportional to the local curvature. A probability p of developing overhangs through lateral growth is also introduced. For small external fluxes, we find a fractal regime of growth. The value of p determines the fractal dimension of the aggregate. Furthermore, for each value of p a crossover between two different fractal dimensions is observed. The roughness exponent χ of the aggregates, instead, does not depend on p (χ simeq 0.5). A Fixed Scale Transformation (FST) approach is applied to compute theoretically the fractal dimension for one of the branches of the structure."^^ . "2001-02" . "54" . "2" . . "IOPscience"^^ . . . "EPL (Europhysics Letters)"^^ . . . "02955075" . . . . . . . . . . "Guido"^^ . "Caldarelli"^^ . "Guido Caldarelli"^^ . . "Raffaele"^^ . "Cafiero"^^ . "Raffaele Cafiero"^^ . . . . . "HTML Summary of #1144 \n\nFractal growth from local instabilities\n\n" . "text/html" . . . "QC Physics"@en . . . "QD Chemistry"@en . .