boundary wall
21Berlin Wall — For the chess opening variation, sometimes known as Berlin Wall, see Berlin Defence. View from the West Berlin side of graffiti art on the wall in 1986. The wall s infa …
22Hadrian's Wall — This article is about the fortification in Northern England. For the Broad Wall of Jerusalem, see Broad Wall (Jerusalem). Coordinates: 55°01′27″N 2°17′33″W / 55.02417°N 2 …
23Blasius boundary layer — A Blasius boundary layer, in physics and fluid mechanics, describes the steady two dimensional boundary layer that forms on a semi infinite plate which is held parallel to a constant unidirectional flow U.Within the boundary layer the usual… …
24St Alphage London Wall — Coordinates: 51°31′3.57″N 0°5′32.03″W / 51.5176583°N 0.0922306°W / 51.5176583; 0.0922306 …
25Invisible wall — An invisible wall is a video game term for a boundary that limits where a player can go, but doesn t appear in game as any kind of visible obstacle, or as an obstacle that in reality could easily be bypassed, such as a mid sized rock or short… …
26Cross-boundary subsidy — Alaskan boreal forest in Yukon National Wildlife Refuge Cross boundary subsidies are caused by organisms or materials that cross or traverse habitat patch boundaries, subsidizing the resident populations. The transferred organisms and materials… …
27Grain boundary — A grain boundary is the interface between two grains in a polycrystalline material. Grain boundaries disrupt the motion of dislocations through a material, so reducing crystallite size is a common way to improve strength, as described by the Hall …
28Cross-boundary subsidies — are caused by organisms or materials that cross or traverse habitat patch boundaries, subsidizing the resident populations. The transferred organisms and materials may provide additional predators, prey, or nutrients to resident species, which… …
29Fourth wall — The fourth wall is the imaginary wall at the front of the stage in a proscenium theater, through which the audience sees the action in the world of the play. It was made explicit by Denis Diderot [ The Fourth Wall and the Third Space by John… …
30Great Wall of Gorgan — The Great Wall of Gorgan, also called the Gorgan Defense Wall, Anushirvân Barrier, Firuz Barrier and Qazal Al an, and sometimes Sadd i Iskandar , (Persian for dam or barrier of Alexander) is an ancient defensive facility located in the Gorgan… …
