Quality of Service in a communication network is managed. An overload recovery circuit is configured to reduce andor eliminate the slow tail voltage that may be caused by overloading a composite amplifier, and thus provide a faster overload recovery time over a wide range of feedback components for the composite amplifier. The restoration device includes a longitudinal member arranged for transoral placement into a stomach, a tissue shaper carried on the longitudinal member that causes stomach tissue to assume a shape related to a gastroesophageal flap, and a tissue fixation device that maintains the shaped stomach tissue in a shape approximating a gastroesophageal flap. Discharge nozzles may discharge the water at an angle defined downwardly towards the water line to thereby create the artificial current leading away from the existing support structure. The fingerprint is compared to unknown files to identify uses of the source file. The connector socket for the side of the air filter element facing the cover element is designed as a deflecting connector socket that extends at least partially outside of the cross-sectional area covered by the air filter element and that is connected to the housing bottom part.