To convert the structure of a Web page into contents that a user can easily listen to, and for permitting the user to access and obtain information without have to perform and navigation, in a manner similar to listening to the radio. The method for calibrating the valve also includes determining if a time-derivative of the sensed fluid pressure is greater than a predetermined threshold over a predetermined period of time, and determining a cracking point current command directed to the valve. Numerous other aspects are provided. In contrast, work on different mechanisms for guaranteeing progress in the context of lock-free and wait-free algorithms has been hampered by the fact that modifications to the \u201chelping\u201d mechanisms has generally required the proofs for the entire algorithm to be done again.