<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Surface effects in invasion percolation"^^ . "Boundary effects for invasion percolation are introduced and discussed here. The presence of boundaries determines a set of critical exponents characteristic of the boundary. In this paper we present numerical simulations showing a remarkably different fractal dimension for the region of the percolating cluster near the boundary. In fact, near the surface we find a value of $D^{sur}=1.65\\pm 0.02$,(for IP with trapping $D_{tr}^{sur}=1.59\\pm 0.03$), compared with the bulk value of $D_{sur}=1.88\\pm 0.02$ ($D_{tr}^{sur}=1.85\\pm 0.02$). We find a logarithmic\r\ncrossover from surface to bulk fractal properties, as one would expect from the finite-size theory\r\nof critical systems. The distribution of the quenched variables on the growing interface near\r\nthe boundary self-organizes into an asymptotic shape characterized by a discontinuity at a value $x_c=0.5$, which coincides with the bulk critical threshold. The exponent $\\tau^{sur}$ of the boundary\r\navalanche distribution for IP without trapping is $\\tau^{sur}=1.56\\pm 0.05$; this value is very near\r\nto the bulk one. Then we conclude that only the geometrical properties (fractal dimension) of\r\nthe model are affected by the presence of a boundary, while other statistical and dynamical\r\nproperties are unchanged. Furthermore, we are able to present a theoretical computation of the\r\nrelevant critical exponents near the boundary. This analysis combines two recently introduced\r\ntheoretical tools, the fixed scale transformation and the run time statistics, which are particularly\r\nsuited for the study of irreversible self-organized growth models with quenched disorder. Our\r\ntheoretical results are in rather good agreement with numerical data. "^^ . "1997-08" . "56" . "2" . . "American Physical Society"^^ . . . "Physical Review E"^^ . . . "15393755" . . . . . . . . . . . . . "Guido"^^ . "Caldarelli"^^ . "Guido Caldarelli"^^ . . "Andrea"^^ . "Gabrielli"^^ . "Andrea Gabrielli"^^ . . "Raffaele"^^ . "Cafiero"^^ . "Raffaele Cafiero"^^ . . . . . "HTML Summary of #1177 \n\nSurface effects in invasion percolation\n\n" . "text/html" . . . "QC Physics"@en . .