title: Concepts of renormalization in physics.
abstract: A non technical introduction to the concept of renormalization is given, with an emphasis on the energy scale dependence in the description of a physical system. We first describe the idea of scale dependence in the study of a ferromagnetic phase transition, and then show how similar ideas appear in particle physics. This short review is written for non-particle physicists and/or students aiming at studying particle physics.
authors.affiliation: Physics Department, King's College London, UK. jean.alexandre@kcl.ac.uk
authors.forename: Jean
authors.initials: J
authors.lastname: Alexandre