Scaling dimensionIn theoretical physics, the scaling dimension, or simply dimension, of a local operator in a quantum field theory characterizes the rescaling properties of the operator under spacetime dilations . If the quantum field theory is scale invariant, scaling dimensions of operators are fixed numbers, otherwise they are functions of the distance scale. In a scale invariant quantum field theory, by definition each operator O acquires under a dilation a factor , where is a number called the scaling dimension of O.
Green growthGreen growth is a concept in economic theory and policymaking used to describe paths of economic growth that are environmentally sustainable. It is based on the understanding that as long as economic growth remains a predominant goal, a decoupling of economic growth from resource use and adverse environmental impacts is required. As such, green growth is closely related to the concepts of green economy and low-carbon or sustainable development. A main driver for green growth is the transition towards sustainable energy systems.
Tiers mondeL'expression tiers monde, ou tiers-monde, lancée en 1952, se rapporte à l'ensemble des pays africains, asiatiques, océaniens ou du continent américain en carence de développement. Ce terme est considéré comme obsolète par certains au profit de celui de pays les moins avancés (PMA). Les termes premier monde, second monde et tiers monde ont été employés pour regrouper les nations de la Terre en trois grandes catégories. Ces trois termes ne sont pas apparus simultanément.
