title: Unified approach to growth and aging in biological, technical and biotechnical systems.
abstract: Complex systems, in many different scientific sectors, show coarse-grain properties with simple growth laws with respect to fundamental microscopic algorithms. We propose a classification scheme of growth laws which includes human aging, tumor (and/or tissue) growth, logistic and generalized logistic growth and the aging of technical devices. The proposed classification permits to evaluate the aging/failure of combined new bio-technical "manufactured products", where part of the system evolves in time according to biological-mortality laws and part according to technical device behaviors. Moreover it suggests a direct relation between the mortality leveling-off for humans and technical devices and the observed small cure probability for large tumors.
authors: Dipartimento di Fisica, Universita' di Catania, 95100 Catania, Via Santa Sofia 64, Italy ; INFN, Sezione di Catania, 95100 Catania, Italy.
authors: Paolo
authors: P
authors: Castorina
authors: Philippe
authors: P
authors: Blanchard
keywords: 89.75.-k; Aging; Growth laws; Tumor growth
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