single-direction
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Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… … Wikipedia
Single carriageway — is the British designation for the most common type of road; one with no physical separation ( central reservation ) between opposing flows of traffic. It usually has two or more marked traffic lanes, one in each direction, although narrow rural… … Wikipedia
Direction (song) — Direction Single by Heavens to Betsy B side The Ones , Driving Song … Wikipedia
Direction — may refer to: Direction (geometry) Relative direction, for instance left, right, forward, backwards, up, and down Compass direction Film direction, the filmmaker who is in charge of the making of the visual medium Stage direction, also called… … Wikipedia
single — sin‧gle [ˈsɪŋgl] noun [countable] TRAVEL a ticket for a journey from one place to another but not back again: • A single to Oxford, please. compare return2 * * * Ⅰ. single UK US /ˈsɪŋgl/ adjective … Financial and business terms
Single-frequency signaling — (SF) is line signaling (in telephony) in which dial pulses or supervisory signals are conveyed by a single voice frequency tone in each direction. SF and similar systems were used in 20th century carrier systems.An SF signaling unit converts DC… … Wikipedia
Single-acting — Sin gle act ing, a. Having simplicity of action; especially (Mach.), acting or exerting force during strokes in one direction only; said of a reciprocating engine, pump, etc. [1913 Webster] … The Collaborative International Dictionary of English
single-acting — [siŋ′gəlak′tiŋ] adj. acting in or impelled from one direction only, as an engine; not reciprocating … English World dictionary
Single bullet theory — The Single Bullet Theory (or Magic Bullet Theory, as it is commonly called by its critics) was introduced by the Warren Commission to explain how three shots made by Lee Harvey Oswald resulted in the assassination of United States President John… … Wikipedia
Single-line working — On a double track railway, single line working refers to the practice of using one track out of two, usually when one of the tracks is out of use for maintenance or because of damage or some obstruction. Circumstances Tracks that are signalled… … Wikipedia
Single track (rail) — A single track railway is one where traffic in both directions shares the same track. In the early days of railways, especially before the telegraph, operation of significant numbers of trains on a single track railway was fraught with… … Wikipedia
