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Entrance to HM Prison Edinburgh. A mantrap, security mantrap portal, airlock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens.
The House of Slaves (Maison des Esclaves) and its Door of No Return is a museum and memorial to the victims of the Atlantic slave trade on Gorée Island, 3 km off the coast of the city of Dakar, Senegal. Its museum, which was opened in 1962 and curated until Boubacar Joseph Ndiaye's death in 2009, is said to memorialise the final exit point of ...
A blocked-up medieval sallyport at the Cittadella in Gozo, Malta. A sallyport is a secure, controlled entry way to an enclosure, e.g., a fortification or prison. The entrance is usually protected by some means, such as a fixed wall on the outside, parallel to the door, which must be circumvented to enter and prevents direct enemy fire from a ...
Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation (e.g., rail, ship, aircraft, and truck), without any handling of the freight itself when changing modes. The method reduces cargo handling, and so improves security, reduces damage and loss, and ...
An ornate 19th-century porte-cochère, at Waddesdon Manor A modern example at a hospital. A porte-cochère (/ ˌ p ɔːr t k oʊ ˈ ʃ ɛ r /; French: [pɔʁt.kɔ.ʃɛʁ]; lit. ' coach gateway '; [1] pl. porte-cochères or portes-cochères) [2] is a doorway to a building or courtyard, "often very grand," through which vehicles can enter from the street [3] or a covered porch-like structure at ...
Postern. A postern is a secondary door or gate in a fortification such as a city wall or castle curtain wall. Posterns were often located in a concealed location which allowed the occupants to come and go inconspicuously. In the event of a siege, a postern could act as a sally port, allowing defenders to make a sortie on the besiegers.
Porthole. A porthole, sometimes called bull's-eye window or bull's-eye, [1] is a generally circular window used on the hull of ships to admit light and air. Though the term is of maritime origin, it is also used to describe round windows on armored vehicles, aircraft, automobiles (the Ford Thunderbird a notable example) and even spacecraft.
The Open Door Policy (Chinese: 門戶開放政策) is the United States diplomatic policy established in the late 19th and early 20th century that called for a system of equal trade and investment and to guarantee the territorial integrity of Qing China. The policy was created in U.S. Secretary of State John Hay 's Open Door Note, dated ...