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
Work unit in China led to further difficulties for the "danwei" system as the state run enterprises were increasingly unable to compete. At the same time the role of the work unit has changed as China has moved from a socialist ideology to "Socialism with Chinese characteristics". By 2000 much of the work unit's power had been removed. In 2003, for example, it became possible to marry or divorce someone without needing authorization from one's work unit. Work unit A unit or danwei () is the name given to a place of employment in the People's Republic of China. While the term