A system and method of saving digital content classified by person-based clustering. The circuit senses information pertaining to a permeability of the first magnetically conductive structure relative to a permeability of the second magnetically conductive structure. Before, during or after the primary game a bonus game is played, apart from the primary game, which can trigger an separate, unrelated award. 3 and a geometrical thickness e1 of between 5 and 50 nm;a low-index second layer, having a refractive index n2 of between 1. The system includes panel and string combiner sentries or intelligent devices, in bidirectional communication with a master device on the site to facilitate installation and troubleshooting of faults in the array, including performance monitoring and diagnostic data collection. The capacitor chamber is configured to provide a capacitor chamber opening near a top portion, through which excess fluid contained in the capacitor chamber can flow.