Work of breathing When there is increased gas flow resistance, the optimal respiratory rate decreases. This work (generally during the inhalation phase) is stored as potential energy which is recovered during exhalation. A pressure difference is required to overcome the frictional resistance to gas flow due to viscosity, and to provide non-elastic components of movement of the airway tissues to accommodate pulmonary volume change. Total work done against non elastic forces is 35% of total. Work is defined as a force applied over a distance. The SI unit of work is the Joule, equivalent to a force of 1 Newton exerted along a
Scientific Revolution introduced the term "scientific revolution", centering his analysis on Galileo. The term was popularized by Butterfield in his "Origins of Modern Science". Thomas Kuhn's 1962 work "The Structure of Scientific Revolutions" emphasized that different theoretical frameworks—such as Einstein's relativity theory and Newton's theory of gravity, which it replaced—cannot be directly compared. The transformation of scientific subject also concerns the social sciences. These inherit from a natural philosophy a dispute that authors like Francesco Bacone and Descartes take charge of following. This particular aspect is questioned. Thus arise disciplines that reflect the natural world with social laws. They are sociology, social