The present invention relates to a wave-power unit having a floating body and a rotating electric generator mechanically connected to the floating body. The implants release the agents from the biodegradable polymer component to a target site of a patient as the implant degrades. As well, the present invention ensures the lateral rigidity of a rear axle and prevents deflection of the vehicle when traveling. When the participant opens the message, the electronic medium is produced by the server that includes static and dynamic regions. A current can be applied to at least one phase of the stator coil of the motor such that, if the motor stands still, a directed magnetic flux is created which interacts with the permanent magnets of the rotor in such a way that the resulting torque will be close to zero. Methods of using such interactive prayer systems are also provided.