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oai:recercat.cat:2445/1448122025-11-19T20:27:09Zcom_2072_1057col_2072_478822col_2072_478914col_2072_478917

Increasing power-law range in avalanche amplitude and energy distributions Navas Portella, Víctor Serra, Isabel Corral, Álvaro Vives i Santa-Eulàlia, Eduard Sistemes complexos Materials porosos Complex systems Porous materials Power-law-type probability density functions spanning several orders of magnitude are found for different avalanche properties. We propose a methodology to overcome empirical constraints that limit the range of truncated power-law distributions. By considering catalogs of events that cover different observation windows, the maximum likelihood estimation of a global power-law exponent is computed. This methodology is applied to amplitude and energy distributions of acoustic emission avalanches in failure-under-compression experiments of a nanoporous silica glass, finding in some cases global exponents in an unprecedented broad range: 4.5 decades for amplitudes and 9.5 decades for energies. In the latter case, however, strict statistical analysis suggests experimental limitations might alter the power-law behavior. 2019-11-14T16:13:46Z 2019-11-14T16:13:46Z 2018-02-21 2019-11-14T16:13:47Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevE.97.022134 Physical Review e, 2018, vol. 97, num. 2, p. 022134 https://doi.org/10.1103/PhysRevE.97.022134 (c) American Physical Society, 2018 info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física de la Matèria Condensada)