Abstract: A system and method for detecting faults and optimiz-ing power usage of solenoid valves. The method includes obtaining a current signature of the solenoid coil, using a dedicated circuit to detect various features and using a pulse width modulation controller optimize the power output of the system. Additionally, using machine learning, the system can be optimized using data from the dedicated circuit.

Abstract: An information processing system acquires an action history including at least one of a purchase history including an item purchased by a user and a browsing history including an item browsed by the user, selects one or more items from the plurality of items as a first item by a first selection method based on the acquired action history, selects one or more items from the plurality of items as a second item by a second selection method different from the first selection method based on the acquired action history, and adds the first item and the second item to the same list.