signalling reliability

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• Signalling theory — Within evolutionary biology, signalling theory refers to a body of theoretical work examining communication between individuals. The central question is when animals with conflicting interests should be expected to communicate honestly .… …   Wikipedia

• Origin of language — The origin of language is the emergence of language in the human species. This is a highly controversial topic, empirical evidence being so limited that many regard it as unsuitable for serious scholars. In 1866, the Linguistic Society of Paris… …   Wikipedia

• Railways in Melbourne — Melbourne rail network  City Loop  Caulfield group  Frankston line  Pakenham line  Sandringham line  Cranbourne line …   Wikipedia

• Handicap principle — The tail of peacocks, the classic example of a handicapped signal of male quality The handicap principle is a hypothesis originally proposed in 1975 by biologist Amotz Zahavi[1][2 …   Wikipedia

• Circle line (London Underground) — Circle Colour on map Yellow Year opened 1884 Line type Sub Surface Rolling stock C Stock 6 carriages per trainset …   Wikipedia

• Axle counter — An axle counter is a device on a railway that detects the passing of a train in lieu of the more common track circuit. A counting head (or detection point ) is installed at each end of the section, and as each axle passes a head at the start of… …   Wikipedia

• Communications-based train control — CBTC deployment in Metro de Madrid, Spain …   Wikipedia

• VoIPVendor — VoIP TerminologyIn a VoIP based system VoIP or IP PBX starts up (boots up) like any other servers. This can be running on a generic OS based hardware or proprietary OS and specialized server hardware. Once the booting up is complete, the IP… …   Wikipedia

• SS6 — or CCITT No 6 Signalling System [http://www.itu.int/rec/T REC Q.251 Q.300/en ITU T Recommendation Q.251 Q.300] Specifications of Signalling System No. 6] was introduced in the 1970s as an early common channel signalling method for telephone… …   Wikipedia

• Track circuit — A track circuit is a simple electrical device used to detect the presence or absence of a train on rail tracks, used to inform signallers and control relevant signals. Principles and operation The basic principle behind the track circuit lies in… …   Wikipedia

• European Train Control System — The European Train Control System (ETCS) is a signalling, control and train protection system designed to replace the many incompatible safety systems currently used by European railways, especially on high speed lines. History The specification… …   Wikipedia