turn-over frequency
1Over-the-air programming — (OTA) may refer to either free to air, digital television, or in the mobile content world, over the air service provisioning (OTASP), over the air provisioning (OTAP) or over the air parameter administration (OTAPA), methods of distributing new… …
2Over-illumination — This cosmetics store has lighting levels over twice recommended levels[1] Over illumination is the presence of lighting intensity (illuminance) beyond that required for a specified activity. Over illumination was commonly ignored between 1950 and …
3Frequency — For other uses, see Frequency (disambiguation). Three cyclically flashing lights, from lowest frequency (top) to highest frequency (bottom). f is the frequency in hertz (Hz), meaning the number of cycles per second. T is the period in seconds (s) …
4Turnover Frequency — Die Wechselzahl (engl. Turn over number, abk. TON) beschreibt in der Chemie die Anzahl an Formelumsätzen, die ein bestimmter Katalysator beschleunigen kann. Sie ist ein Maß für die Effizienz eines Katalysators und bestimmt das größtmögliche… …
5Gate turn-off thyristor — For other uses of the word, see GTO (disambiguation). GTO thyristor symbol A gate turn off thyristor (GTO) is a special type of thyristor, a high power semiconductor device. GTOs, as opposed to normal thyristors, are fully controllable switches… …
6Utility frequency — The waveform of 230 volt, 50 Hz compared with 110 V, 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency at which alternating current (ac, also AC) is transmitted from a… …
7Radio-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… …
8Variable-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. |… …
9Dual-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… …
10Dual-tone multi-frequency — (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… …
