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In the United States a longer duty cycle is used, 50% for battery-powered buoys (20 seconds on, 20 seconds off) and 75% for on-shore beacons. Ramarks are wide-band beacons which transmit continuously on the radar bands without having to be triggered by an incoming radar signal. The transmission forms a line of Morse characters on the display ...
The RoKAF plans to acquire T-50 advanced trainers, T-50B aerobatic demonstrators, TA-50 LIFT/light attack aircraft, and FA-50 multirole fighters. Its first production contract, for 25 T-50s, was placed in December 2003 and the first pair of T-50 aircraft was delivered 29 December 2005, with the type entering operational service in April 2007.
The original design basis was a zero-point ground acceleration of 250 Gal and a static acceleration of 470 Gal,based on the 1952 Kern County earthquake (0.18 g, 1.4 m/s 2, 4.6 ft/s 2). After the 1978 Miyagi earthquake , when the ground acceleration reached 0.125 g (1.22 m/s 2 , 4.0 ft/s 2 ) for 30 seconds, no damage to the critical parts of the ...
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]
A magnetohydrodynamic generator ( MHD generator) is a magnetohydrodynamic converter that transforms thermal energy and kinetic energy directly into electricity. An MHD generator, like a conventional generator, relies on moving a conductor through a magnetic field to generate electric current. The MHD generator uses hot conductive ionized gas (a ...
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However, generally they are considerably slower (typically by a factor 2–10) than fast, non-cryptographic random number generators. These include: Stream ciphers. Popular choices are Salsa20 or ChaCha (often with the number of rounds reduced to 8 for speed), ISAAC, HC-128 and RC4. Block ciphers in counter mode.
A radioisotope thermoelectric generator ( RTG, RITEG ), sometimes referred to as a radioisotope power system (RPS), is a type of nuclear battery that uses an array of thermocouples to convert the heat released by the decay of a suitable radioactive material into electricity by the Seebeck effect. This type of generator has no moving parts and ...