High frequency (HF) is the ITU designation for the band of radio waves with frequency between 3 and 30 megahertz (MHz). It is also known as the decameter...
17 KB (1,930 words) - 23:33, 6 August 2024
High-frequency trading (HFT) is a type of algorithmic trading in finance characterized by high speeds, high turnover rates, and high order-to-trade ratios...
75 KB (8,410 words) - 23:32, 11 August 2024
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with...
23 KB (2,831 words) - 09:13, 30 August 2024
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as...
27 KB (3,058 words) - 22:09, 20 August 2024
Extremely high frequency is the International Telecommunication Union designation for the band of radio frequencies in the electromagnetic spectrum from...
23 KB (2,469 words) - 03:41, 29 July 2024
Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz). This band of frequencies is also...
10 KB (1,100 words) - 16:20, 5 September 2023
Hearing range (redirect from High frequency limit)
at high frequencies, and a gradual loss of sensitivity to higher frequencies with age is considered normal. Sensitivity also varies with frequency, as...
28 KB (3,419 words) - 23:26, 18 July 2024
The High-frequency Active Auroral Research Program (HAARP) is a University of Alaska Fairbanks program which researches the ionosphere – the highest, ionized...
57 KB (6,355 words) - 20:39, 11 August 2024
High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is a type of radio direction finder (RDF) introduced in...
25 KB (3,677 words) - 12:38, 29 July 2024
High frequency data refers to time-series data collected at an extremely fine scale. As a result of advanced computational power in recent decades, high...
15 KB (2,010 words) - 21:45, 29 April 2024
to as temporal frequency for clarity and to distinguish it from spatial frequency. Ordinary frequency is related to angular frequency (symbol ω, with...
21 KB (2,290 words) - 11:44, 15 July 2024
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical...
15 KB (1,106 words) - 05:52, 27 August 2024
High-frequency ventilation is a type of mechanical ventilation which utilizes a respiratory rate greater than four times the normal value (>150 (Vf) breaths...
24 KB (2,969 words) - 03:08, 16 December 2023
High-frequency oscillations (HFO) are brain waves of the frequency faster than ~80 Hz, generated by neuronal cell population. High-frequency oscillations...
23 KB (2,452 words) - 01:19, 5 April 2024
Dielectric heating (redirect from High-frequency heating)
known as electronic heating, radio frequency heating, and high-frequency heating, is the process in which a radio frequency (RF) alternating electric field...
18 KB (2,366 words) - 16:00, 26 July 2024
An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz...
7 KB (398 words) - 08:51, 22 July 2023
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating...
46 KB (5,521 words) - 21:18, 3 August 2024
Radio spectrum (redirect from Frequency plan)
the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range, called radio waves, are widely...
44 KB (2,900 words) - 15:04, 5 August 2024
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used...
31 KB (3,937 words) - 20:27, 7 July 2024
Letter beacon (redirect from Single Letter High Frequency Beacons)
"Single Letter Beacons" SLHFB, or "Single Letter High Frequency Beacons" SLHFM, or "Single Letter High Frequency Markers" Cluster beacons MX — an ENIGMA and...
18 KB (1,894 words) - 06:14, 14 February 2024
Amateur radio frequency allocation is done by national telecommunication authorities. Globally, the International Telecommunication Union (ITU) oversees...
51 KB (3,945 words) - 03:33, 25 June 2024
Epicanthic fold (section High-frequency populations)
Khoisan and Nilotic peoples). Among South Asians, they occur at very high frequencies among the Nepalis, Bhutanese,[better source needed] Northeast Indians...
15 KB (1,487 words) - 21:15, 28 August 2024
Electromagnetic spectrum (redirect from Electromagnetic frequency spectrum)
different names for the electromagnetic waves within each band. From low to high frequency these are: radio waves, microwaves, infrared, visible light, ultraviolet...
46 KB (4,829 words) - 19:56, 1 September 2024
Advanced Extremely High Frequency (AEHF) is a constellation of communications satellites operated by the United States Space Force. They are used to relay...
23 KB (2,468 words) - 07:43, 30 August 2024
High-frequency vibrating screens are the most important screening machines primarily utilised in the mineral processing industry. They are used to separate...
22 KB (3,138 words) - 16:07, 24 June 2024
A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, or...
66 KB (6,883 words) - 23:13, 20 August 2024
Gravitational wave (redirect from High Frequency Gravitational Waves)
above are in the low-frequency end of the gravitational-wave spectrum (10−7 to 105 Hz). An astrophysical source at the high-frequency end of the gravitational-wave...
104 KB (12,566 words) - 21:15, 20 August 2024
Alternating current (redirect from AC frequency)
wire is used for making high-Q inductors, reducing losses in flexible conductors carrying very high currents at lower frequencies, and in the windings of...
48 KB (5,948 words) - 15:16, 23 August 2024
A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with...
19 KB (2,832 words) - 20:08, 16 August 2024
Most common words in English (redirect from High-frequency word)
and emails. Another English corpus that has been used to study word frequency is the Brown Corpus, which was compiled by researchers at Brown University...
16 KB (858 words) - 17:56, 20 March 2024