frequency-control service
11Public transport bus service — Bus services play a major role in the provision of public transport. These services can take many forms, varying in distance covered, types of vehicle used, and can operate with fixed or flexible routes and schedules. Services may be operated by… …
12Level of service — (LOS) is a measure of effectiveness by which traffic engineers determine the quality of service on elements of transportation infrastructure. Whilst the motorist is, in general, interested in speed of his journey, LOS is a more holistic approach …
13Flight Information Service — A Flight Information Service (FIS) is a basic form of Air Traffic Control service which is available to any aircraft within a Flight Information Region (FIR), as agreed internationally by ICAO.It is defined as information pertinent to the safe… …
14Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …
15Flight service station — A flight service station (FSS) is an air traffic facility that provides information and services to aircraft pilots before, during, and after flights, but unlike air traffic control, is not responsible for giving instructions or clearances or… …
16National Grid (UK) reserve service — National Grid Frequency Response= This is a service that large power users such as steel works, cold stores, large water pumps, can offer to the UK National Grid. These contractors have frequency sensitive relays fitted to the incoming breakers,… …
17Weather control — is the act of manipulating or altering certain aspects of the environment to produce desirable changes in weather.History of weather controlSome American Indians had rituals which they believed could induce rain. The Finnish people, on the other… …
18Dual-tone multi-frequency signaling — One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual tone multi frequency signaling (DTMF) is used for telecommunication signaling over… …
19Variable-frequency drive — A variable frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor.cite book | first=Sylvester J. |… …
20Remote control — For other uses, see Remote control (disambiguation). A television remote control unit (RCU) A remote control is a component of an electronics device, most commonly a television set, used for operating the television device wireless …
