Home > Gate

A gate is a point of entry to a space enclosed by walls, or an opening in a fence. Gates may prevent entry, or they may be merely decorative.

Larger gates can be used for a whole building, such as a castle or fortified town, or the actual doors that block entry through the gatehouse.

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 grate s 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 conjuction with gates to facilitate passing the moat; moats were often used to increase the effective height of the walls.

See also: City gate, Triumphal archA triumphal arch is a structure in the shape of a monumental gate, usually built to celebrate a victory in war. This tradition dates back to Ancient Rome and the tradition of the Roman triumphes. A number of arches from the city's imperial era can still b, ToriiItsukushima Shrine A Torii ( Japanese: ) is a traditional Japanese gate commonly found at the entry to a Shinto shrine. It has two upright supports and two crossbars on the top, and is frequently painted vermilion. Some torii have tablets with writing mou, domoticsDomotics is the application of computer and robot technologies to domestic appliances. It is a portmanteau word formed from domus ( Latin, meaning house) and robotics''. Remote control Most modern houses have appliances that allow some degree of remote co.

In politicsPolitics is the process and method of decision-making for groups of human beings. Although it is generally applied to governments, politics is also observed in all human group interactions including corporate, academic, and religious. Political science is, the suffixSUF-FIX In linguistics, a suffix is an affix that succeeds the morphemes to which it can attach. Example: establish ( verb) + ment suffix —> establishment ( noun). See derivation). A suffix is also a style at the end of a person's name which gives additio -gate has been used to name a large number of public scandalA scandal involves widely publicized allegations of wrong-doing, disgrace or moral outrage. A scandal may be based on reality, or the product of false allegations. Some scandals are broken by a whistle-blower revealing wrongdoing within an organization ors lesser and greater, real or perceived, after the Watergate scandal of the early 1970s, which is still considered by many to be the worst political scandal as of 2004. Examples: Monicagate, Iraqgate .

In a transistor, particularly a field effect transistor or FET, the Gate is the controlling terminal to which a voltage is applied to control the current passing between the Source and Drain.

In the context of electronic digital logic design, a gate is a logic function building block, such as and, or, not, nand, nor, xor (exclusive-or). For measuring the complexity of logic circuits such as ASICs, the amount of logic they contain is compared to a number of 2-input nand or nor gates.

Depending on technology, a 2-input nand or nor gate requires 4 or 6 transistors.

An edge-triggered D-type flip-flop is usually considered equivalent to 6 gates, more if it has clock enable and reset functionality.