Other real-time systems use algorithms to detect suspicious behaviour, such as a group loitering near a door where entry is barred, or to spot items of luggage that seem to have been left unattended.

Paring down the components of a house to a minimal amount of planes and openings, the scheme is anchored by an obscured entry sequence and a staircase volume, both clad in iron spot masonry.

With theory analysis, experiment research and spot test, this paper takes the lead in establishing technology system of gob-side entry retaining with large section or small one.