A system for managing a local cache that is part of a distributed cache is disclosed. A shaft nut having an internal thread which can be screwed onto an external thread of the shaft journal, is provided with an additional external thread onto which a further nut can be screwed via a counter-thread to produce an axially acting interlocking connection between the further nut and the joint part. The light stimulates the ciliary region and ablates debris lodged therein. The motor current remains virtually unchanged during the switching gaps by way of a free-wheeling diode. A controller of this system is operable to restrict flow of the processed gas into the fuel tank when the fuel vapor concentration in the processed gas is lower than or is expected to be lower than a predetermined level. For each illustrated parent category, a distinct first level web page is provided that includes a first level subcategory symbol for each first level subcategory in the category paths of the data element associated with that parent category and the data element symbol for each such data element shown associated with its respective first level subcategory symbol.