Mechanical seals, seal assemblies and pumps are disclosed. Two sets of FIFO control logic and FIFO ports are associated with a single BRAM so that the BRAM can be operated as memory buffers for two independent FIFO memory systems. Any version of an application may be upgraded to any other version of the application, through the use of a series of incremental update patches. The invention also describes connection and data carrier to perform above described method where the data carrier consists of a processor, transmitting and receiving unit, block for transforming electromagnetic field and a memory to store a file of orders. The data item is inserted into the identified partition. If answering the query is faster using the compressed representation, the query is executed on weight coefficients of the compressed time series to produce a query result, and the query result is translated back into an uncompressed representation.