An engine with dependent intake cams requires a different method and formula to determine the phase of the intake cams. and for at least 1 hour; characterized in that said electron beam has an acceleration energy above 7 MeV. The transformer T includes a primary winding Wa arranged so as to form a set with the rechargeable battery BT1, and a secondary winding Wb arranged so as to form a set with the rechargeable battery BT2. Only after the hydraulic firing valve is open, does the backup select valve initiate hydraulic pressure to the mode select control valve thereby preventing hydraulic actuation of the backup select valve. Data for each subrange is stored in a plurality of transmission data memories. Futhermore, bone condition of a subject can be evaluated by analyzing x-ray images of the subject’s bone and therapies can then be selected or devised for the subject.