Wall

A wall is a structure that defines an area, carries a load, or provides shelter or security. There are many kinds of walls:

Etymology

Wall comes from Latin vallum meaning "...an earthen wall or rampart set with palisades, a row or line of stakes, a wall, a rampart, fortification..." while the Latin word murus means a defensive stone wallEnglish uses the same word to mean an external wall and the internal sides of a room, but this is not universal. Many languages distinguish between the two. In German, some of this distinction can be seen between Wand and Mauer, in Spanish between pared and muro.

Defensive wall

The word wall originally referred to defensive walls and ramparts.

Video wall

A video wall is a special multi-monitor setup that consists of multiple computer monitors, video projectors, or television sets tiled together contiguously or overlapped in order to form one large screen. Typical display technologies include LCD panels, Direct View LED arrays, blended projection screens, Laser Phosphor Displays, and rear projection cubes.

Screens specifically designed for use in video walls usually have narrow bezels in order to minimize mullion, the gap between active display areas, and are built with long-term serviceability in mind. Such screens often contain the hardware necessary to stack similar screens together, along with connections to daisy chain power, video, and command signals between screens. A command signal may, for example, power all screens in the video wall on or off, or calibrate the brightness of a single screen after bulb replacement.

Reasons for using a video wall instead of a single large screen can include the ability to customize tile layouts, greater screen area per unit cost, and greater pixel density per unit cost, due to the economics of manufacturing single screens which are unusual in shape, size, or resolution.

The Wall

The Wall is the eleventh studio album by the English progressive rock band Pink Floyd. It is the last studio album released with the classic lineup of guitarist David Gilmour, bassist/lyricist Roger Waters, keyboardist Richard Wright and drummer Nick Mason before Wright left the band. Released as a double album on 30 November 1979, it was supported by a tour with elaborate theatrical effects, and adapted into a 1982 feature film, Pink Floyd – The Wall. The album features the band's only number one single; "Another Brick in the Wall Part 2".

As with Pink Floyd's previous three albums, The Wall is a concept album and explores themes of abandonment and personal isolation. The album is a rock opera that follows Pink, a character whom Waters modelled after himself and the band's original leader, Syd Barrett. Pink's life begins with the loss of his father during the Second World War and continues with abuse from his schoolteachers, an overprotective mother, and the breakdown of his marriage; all contribute to his eventual self-imposed isolation from society, represented by a metaphorical wall. Waters conceived the album during Pink Floyd's 1977 In the Flesh Tour, when his frustration with the audience became so acute that he imagined a wall between the audience and the stage.