A sliding door device has a first pin body provided, at a floor surface; a guide member provided at the door and having a guide groove in which the first pin body fits when the door is closed; and a second pin body that is provided on the floor surface and can be fit in a door groove formed at the door bottom. Starting from a pool of seed nodes that have previously been identified as malicious, a two-phase score propagation algorithm is employed to propagate threat scores from the seeded nodes to other nodes in an IP-address connectivity graph. An updated drawing document can be generated following a change to one of the components. The security patch may be installed on the embedded system at run-time, and it is then executed to modify the currently operating firmware to redirect firmware operation from vulnerable procedures toward the new, secure procedures contained in the software patch. The loop filter further includes a switched capacitor array configured to cause the initial capacitance to increase to the target capacitance in response to a digital feedback signal provided by the loop filter calibration module.