The presently described technology provides compositions comprising aryl carboxylic acids chemically conjugated to hydromorphone to form novel prodrugscompositions of hydromorphone. Each nozzle comprises a chamber for holding ink to be ejected, the chamber having an opening defined in a roof structure; and a thermal bend actuator for ejecting droplets of ink from the chamber through the opening. The collected identification information is stored in a memory register in the personal computer on a scheduled periodic basis, and then transmitted to and stored on a remote service computer. Content of one or more fields of the packets transmitted by the beacon devices and received by one or more of the receiver devices is obtained. The game dedicated machine 52 can judge whether or not the commercial ads have been introduced into and are in operation in the game software and, if the commercial ads are not in the game software, the game dedicated machine 52 can be made so as to be out of operation.