The 2015 Inventory of Air Emissions released today shows the Port of Los Angeles has largely continued to preserve clean air gains. The 2015 Inventory of Air Emissions released today shows the Port of Los Angeles has largely continued to preserve clean air gains.
PSI Definition: PSI is a unit of pressure expressed in pounds of force per square inch of area. It stands for Pounds per Square Inch. 1 PSI = 6894 Pascals = 0.070 atmospheres = 51.715 torr. Up Next. Up Next.
Fred Keller - The Personalized System of Instruction (PSI) PSI is also known as the Keller plan. First described by Fred Keller in Good Bye Teacher - Journal of Applied Behavior Analysis (1968). It is composed of small self-paced modularized units of instructions where study guides direct learners through the modules. Unit tests are given on each module where the learners must show mastery by scoring at least a 90%.