A method for providing stand-in objects, where relationships among objects are automatically resolved in an object oriented relational database model without the necessity of retrieving data from the database until it is needed. A revolving ring can be controlled to rotate in order to work on the locking segments so as to push them into at least one radial seat of the projecting portion of the second part of a joint or to house them in its own radial seat, respectively for the coupling and the uncoupling of the fitting parts. Also, a battery charging method that may be used to reverse the sulfation process in a battery. The coupler includes a retractable keeper slidably received within. An isolation structure is disposed between the first bit line and the first selective gate and between the second bit line and the second selective gate. A method for controlling the alarm clock function is also provided.