Information about gate

GATE may refer to:

Gay Alliance Toward Equality, one of the first Canadian gay liberation groups
Gifted education ("Gifted And Talented Education")
Graduate Aptitude Test in Engineering, an admission exam for almost all technical institutes in India
GARP Atlantic Tropical Experiment, a 1974 study under the Global Atmospheric Research Programme to study the interaction of the tropical Atlantic Ocean and the atmosphere
General Architecture for Text Engineering, a human language processing system
Grupo de Ações Táticas Especiais, Brazilian police special forces

History

In ancient and medieval times, gatehouses of cities and castles were heavily defended and fortified to prevent breaching of the gates. Often the gate would consist of several pairs of doors and iron grates along a tunnel through the gatehouse. The top of the tunnel commonly had murder holes to allow defenders to attack invaders trying to breach the inner doors. Drawbridges were common in conjunction with gates to facilitate passing the moat; moats were often used to increase the effective height of the walls.

A number of gates are used to mark military victories or important occasions as in a triumphal arch.

Engineering

Gate (engineering), a movable structure used to control the flow of fluid in a pipe or channel
Gate (transistor), a terminal of a field effect transistor

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The word gate can refer to:

Gate, an opening in a wall or fence

Engineering

Gate (engineering), a movable structure used to control the flow of fluid in a pipe or channel
Gate (transistor), a terminal of a field effect transistor

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A 'wall' is a usually solid structure that defines and sometimes protects an area. Most commonly, a wall delineates a building and supports its superstructure, separates space in buildings into rooms, or protects or delineates a space in the open air.
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fence is a freestanding structure designed to restrict or prevent movement across a boundary. It is generally distinguished from a wall by the lightness of its construction: a wall is usually restricted to such barriers made from solid brick or concrete, blocking vision as well as
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A castle is a defensive structure seen as one of the main symbols of the Middle Ages. The term has a history of scholarly debate surrounding its exact meaning, but it is usually regarded as being distinct from the general terms fort or fortress in that it describes a building
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defensive wall is a fortification used to defend a city or settlement from potential aggressors. In ancient to modern times, they were used to enclose settlements. Generally, these are referred to as city walls or town walls
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door is a panel or barrier, usually hinged, sliding, or electronic, that is used to cover an opening in a wall or partition going into a building or space. A door can be opened to give access and closed more or less securely.
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Automatic Gate Operators

Forms of Automation

Electric Gate Operators

Drawing power from the mains to open a driveway Gate. Generally there are three types of electromechanical gate operator, Worm driven (or Screw type), Articulated arm operators and underground
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Medieval Times dinner theater chain. For the historical time period, see Middle Ages.

Medieval Times Dinner & Tournament is a chain of dinner theaters which stage tournaments in the style of the chivalric contests of the High Middle Ages.
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city is an urban settlement with a particularly important status which differentiates it from a town.

City is primarily used to designate an urban settlement with a large population. However, city may also indicate a special administrative, legal, or historical status.
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Fortifications are military constructions and buildings designed for defense in warfare. Humans have constructed defensive works for many thousands of years, in a variety of increasingly complex designs.
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3, 4, 6
(amphoteric oxide)
Electronegativity 1.83 (Pauling scale)
Ionization energies
(more) 1st: 762.5 kJmol⁻¹
2nd: 1561.9 kJmol⁻¹
3rd: 2957 kJmol⁻¹

Atomic radius 140 pm
Atomic radius (calc.
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A grate is a frame of iron bars to hold fuel for a fire.
It may also refer to a covering of a drain, also called a grating.
It may also refer to an andria bruffel grater.

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This article is about underground passages. For uses of the word tunnel, see Tunnel (disambiguation).

A tunnel is an underground passage. The definition of what constitutes a tunnel is not universally agreed upon.
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A murder-hole is a hole in the ceiling of a gateway or passageway in a fortification through which the defenders can fire, throw or pour dangerous or noxious substances at attackers.
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An invasion (from the Latin invadere, "to walk into") is a military action of soldiers entering a foreign land. An invader is an individual, nation, or other entity participating in such an action.
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drawbridge is a type of movable bridge typically associated with the entrance of a butt the term is often used to describe all different types of movable bridges, like bascule bridges and lift bridges.
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moat is deep, broad trench, usually filled with water, that surrounds a structure, installation, or town, normally to provide it with a preliminary line of defense.

Historic Uses

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A triumphal arch is a structure in the shape of a monumental archway, in theory built to celebrate a victory in war, actually usually to celebrate a ruler. The classical triumphal arch is a free-standing structure, quite separate from city gates or walls, but the form is often used
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Borders define geographic boundaries of political entities or legal jurisdictions, such as governments, states or subnational administrative divisions. They may foster the setting up of buffer zones.
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Threshold may refer to:

In fiction:

Threshold (Doctor Who), organization of Gallifreyan/Human origin in Doctor Who comic strips
Threshold (fictional planet), the planet around which the ringworld Halo orbits in the video game Halo

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Barrier may refer to:

Automatic full barriers, railway
Crash barrier, highway
Language barrier, culture/linguistics
Noise barrier, noise prevention

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city gate is a gate set within a city wall.

Uses

The city gate was usually the place to display the local standards of weight, length and volume. This was of great importance since these varied greatly between cities before any unified metric system.
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Home automation (also called domotics) is a field within building automation, specializing in the specific automation requirements of private homes and in the application of automation techniques for the comfort and security of its residents.
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A Gate in aviation is a section at an airport terminal for transferring passengers and airline crews to an aircraft. Passengers embark or disembark an aircraft through one of these methods:

Jetway bridges

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This gate doesn't prevent entry but clearly suggests a borderline.	A small but elegant gate to a meadow path.	Ishtar Gate is the oldest city gate in existence.	Gates to official residences often feature elaborate ironwork.
In modern times, electronic gateways provide protection, and allow communication traffic to pass.

Gate

See also

History

See also

Engineering

Engineering

Automatic Gate Operators

Forms of Automation

Electric Gate Operators

Historic Uses

Uses