title: Bubbling and large-scale structures in avalanche dynamics.
abstract: Using a simple lattice model for granular media, we present a scenario of self-organization that we term self-organized structuring where the steady state has several unusual features: (1) large-scale spatial and/or temporal inhomogeneities and (2) the occurrence of a nontrivial peaked distribution of large events which propagate like "bubbles" and have a well-defined frequency of occurrence. We discuss the applicability of such a scenario for other models introduced in the framework of self-organized criticality.
authors.affiliation: P. M. M. H.-Ecole Superieure de Physique et Chimie Industrielles, 10 rue Vauquelin, 75231 Paris cedex 05, France.
authors.forename: S
authors.initials: S
authors.lastname: Krishnamurthy
authors.forename: V
authors.initials: V
authors.lastname: Loreto
authors.forename: S
authors.initials: S
authors.lastname: Roux