The invention concerns an automated method to generate the Cyclic Redundancy Check, or CRC, of data packets, minimizing computing time, particularly for the transmission of recursively embedded packets in packet-switching networks, particularly able to carry out the calculation even in case the packet length is not a multiple integer of processed word width. The illumination device may be configured to be installed in the paved floor as one of the floor’s tiles. In a first position, the third tubular structure may span the junction between the first and second tubular structures and, in a second position, the third tubular structure may be rolled back onto itself to engage only one of the first and second tubular structures. The terminal assemblies include clip members that engage an opposing shoulder formed on the interior of the connector housing. An alarm sounds when the LED has been illuminated after the passage of the predetermined time interval. By testing a \u201cbatch\u201d of objects at once, the system improves throughput.