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
Energy-Safety and Energy-Economy Energy-Safety and Energy-Economy Energy Safety and Energy Economy () is a peer-reviewed scientific and technical journal covering energy safety and economy, safety regulations, personnel training, innovation, and recent trends in alternative power sources research. The editor-in-chief is Svetlana Zernes (). It was established in 2005 as "Energy Safety in Documents and Facts Journal", obtaining its current title in 2008. The journal is included in AGRIS, Ulrich's Periodicals Directory, the Higher Attestation Commission's official list, EBSCO, Russian Science Citation Index, Global Impact Factor, Research Bible, SHERPA/RoMEO, WorldCat, Open Academic Journals Index (OAJI) and VINITI Database RAS. In addition to bimonthly issues,