Methods, apparatuses, and systems for grouping digital media items based on shared features. In accordance with the invention a SOI electronic device and an active discharging device coupled to said SOI electronic device is provided to deactivate the parasitic bipolar transistor. Driving time data of unlatch, insertion, withdrawal and settle of each control rod, is stored. A sealing agent is formed on the rims of the first substrate and the second substrate to bond the first substrate and the second substrate and form an airtight space. As the release mechanism is moved from the first position to the second position, the projectile attached to the trigger mechanism is launched. A slave piston incorporated into the first end of the valve bridge and a master piston may be incorporated into the central portion of the valve bridge.