time signalling device
1Comparison of synchronous and asynchronous signalling — Synchronous and asynchronous transmissions are two different methods of transmission synchronization. Synchronous transmissions are synchronized by an external clock, while asynchronous transmissions are synchronized by special signals along the… …
2British absolute block signalling — The principle of the British absolute block system of railway signalling is to facilitate the safe operation of a railway by preventing more than one train from occupying a defined section of route at the same time. This system is used on double… …
3Real-time locating standards — Articleissues copyedit=May 2008According to ISO/IEC FDIS 19762 5 [ [http://www.autoid.org/SC31/sc31.htm] (ISO Subcommittee SC31)] an RTLS (real time locating system) is a combination of hardware and software that is used to continuously determine …
4Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… …
5Glossary of nautical terms — This is a glossary of nautical terms; some remain current, many date from the 17th 19th century. See also Wiktionary s nautical terms, Category:Nautical terms, and Nautical metaphors in English. Contents: A B C D E F G H I J K L M N O P Q R …
6Heliograph — A Heliograph (from the Greek helios (Lang el| Ἥλιος), meaning sun , and (γραφειν) = write) is a wireless solar telegraph that signals using Morse code flashes of sunlight reflected by a mirror. The flashes are produced by momentarily pivoting the …
7Clock — For other uses, see Clock (disambiguation). Timepiece redirects here. For the Kenny Rogers album, see Timepiece (album). Platform clock at King s Cross railway station, London …
8PIC microcontroller — PIC microcontrollers in DIP and QFN packages …
9List of diving hazards and precautions — Contents 1 Effects of relying on breathing equipment while underwater 2 Effects of barotrauma or pressure damage 2.1 …
10Peripheral Component Interconnect — Infobox Computer Hardware Bus name = PCI fullname = peripheral component interconnection caption = Five 5V 32 bit PCI expansion slots on a motherboard invent date = July 1993 invent name = Intel super date = 2004 super name = PCI Express width =… …
