Abstract: A method of dynamically adjusting prices of items using a processor based upon the cross-price effects on demand of associated items based upon offering the associated items at different prices during different time periods.

Abstract: A fluid-driven turbine for converting kinetic energy of an incompressible fluid into mechanical work energy comprising an outer cylinder enclosing a cylindrical chamber with laterally opposed inlet ports and opposed apertures, fluid supply pipe with a common inlet pipe, side pipes and associated inlet pipes, an exhaust pipe, and an inner cylinder with impellers, said inner cylinder connected to a shaft disposed within the apertures of the outer cylinder and rotating upon said shaft once fluid is delivered by the fluid supply pipe into chambers located between the outer cylinder and inner cylinder.