The invention relates to a seat carrier arrangement for a vehicle seat of a utility vehicle, especially a bus, said arrangement comprising a seat carrier supported towards the rear on an energy-absorbing deformation element. A first receiver in the system may receive the first media stream over a network. The compressor used in the compression is powered by the work of expansion produced by expanding a process stream composed of at least a portion of the retentate produced in the ceramic membrane unit. A cancellation processor or controller dampens reflected signals that may be part of the local signal. Several variations are particularly applicable to facilitating tissue approximation in surgical cosmetic applications, particularly chin lifts.