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
National Energy Research Scientific Computing Center the machines in Oakland were taken down and moved. View the interactive timeline created in 2014 in recognition of NERSC's 40 years of HPC leadership. View the list of computer systems installed at NERSC since 1996. To reflect NERSC's mission to support scientific research, the center names its major systems after scientists. The center is located in Shyh Wang Hall, one of the nation's most energy-efficient supercomputer facilities. The building was financed by the University of California which manages Berkeley Lab for the U.S. Department of Energy (DOE). The utility infrastructure and computer systems are provided by DOE. The newest