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
The Logic of Scientific Discovery The Logic of Scientific Discovery The Logic of Scientific Discovery is a 1959 book about the philosophy of science by Karl Popper. Popper rewrote his book in English from the 1934 German original, titled "Logik der Forschung. Zur Erkenntnistheorie der modernen Naturwissenschaft", which literally translates as, "Logic of Research: On the Epistemology of Modern Natural Science"'. Popper argues that science should adopt a methodology based on falsifiability, because no number of experiments can ever prove a theory, but a reproducible experiment or observation can refute one. According to Popper: "non-reproducible single occurrences are of no significance to science. Thus a