A cooling system controller controls the capacity of a variable capacity compressor based upon the temperature of a housing being cooled, the suction pressure of the compressor or both of these criteria. Also provided are methods of inhibiting a papain-family cysteine protease and methods of treating or preventing a disease by administering a composition containing an epoxide inhibitor of the invention. The integrated circuit device also includes a stopper member selectively provided in the electrode film in a bottom layer and a first stopper protection film provided on a side surface of the stopper member.