Several data streams contain video, audio andor other data. The frame has an enclosure with an entrance for receiving waste material. According to the invention, one of the contact elements is mounted in a springy manner and so that one of the contact elements glides along the other element after the two contact elements have been brought into contact with one another for actuating the electric functional group. The MCA handling mechanism provides for synchronization of multiple processors and shared resources and for timely execution resumption within the processors that remain on-line. The system also compensates for heave induced pressure fluctuations on a floating rig when a riser telescoping joint located below a RCD is moving while drilling. When cache allocation in the DBMS or the storage subsystem needs to be changed, information for estimating the cache effect due to the change in cache allocation acquired by the DBMS is used for estimating the cache effect in the storage subsystem.