Abstract: A profile system for fixing coverings, in particular roof sealing sheets, including at least one first fixing profile, at least one second fixing profile, wherein the first and the second fixing profiles each have a fixing flange, a first end section and a second end section, as well as at least one connecting clip for the detent reception of both the first end section of the first fixing profile and also the detent reception of the second end section of the second fixing profile in such a way that the first and the second fixing profiles form a common composite profile.

Abstract: Local clock data is collected at run time in a multiprocessor system. Postprocessing is used to determine a global time base from the local clock readings. Clock drift and offset parameters are calculated for the local clocks. These parameters are used to adjust the time stamps of events in a global event log in order to create a global time base. A first method is used to calculate clock drift and offset parameters between processors with too or more event pairs oriented in the same direction. A second method is used to calculate clock drift and offset parameters between processors with event pairs oriented in opposite directions. A third method is used where the processors have no event pairs between them.