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The instantaneous wave-free ratio (iFR, sometimes referred to as the instant wave-free ratio or instant flow reserve) is a diagnostic tool used to assess whether a stenosis is causing a limitation of blood flow in coronary arteries with subsequent ischemia. iFR is performed during cardiac catheterisation (angiography) using invasive coronary pressure wires which are placed in the coronary ...
[2] 7004 UK: Aerobatic and display code in some countries. [2] 7100, 7200, 7300 US: External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.) [3] Switzerland: 7100 in Switzerland for SAR . [14] 7400 US, UK, Australia: Unmanned aerial vehicle lost link. [15] [16] [17 ...
ASME Y14.44-2008 [1] and IEEE 315-1975 [2] define how to reference and annotate components of electronic devices. It breaks down a system into units, and then any number of sub-assemblies. The unit is the highest level of demarcation in a system and is always a numeral.
Tris(2,4-di-tert-butylphenyl)phosphite is an organophosphorus compound with the formula [(C 4 H 9) 2 C 6 H 3 O] 3 P. This white solid is a widely used stabilizer in polymers where it functions as a secondary antioxidant. It also reduces discoloration (yellowing) of plastics.
In 2002, Aeroflex acquired IFR Systems Inc, a test equipment manufacturer from Wichita, Kansas, originally founded in 1937. [6] In 1998, IFR previously acquired Marconi Instruments, a British test equipment manufacturer. [7] In 2007, Aeroflex was taken private by a group of private equity firms including Veritas Capital, Golden Gate Capital, GS ...
J1 CPDLC ATN VDL Mode 2; J2 CPDLC FANS 1/A HFDL; J3 CPDLC FANS 1/A VDL Mode A/0; J4 CPDLC FANS 1/A VDL Mode 2; J5 CPDLC FANS 1/A SATCOM ; J6 CPDLC FANS 1/A SATCOM ; J7 CPDLC FANS 1/A SATCOM ; K MLS; L ILS; M1 ATC RTF SATCOM (INMARSAT) M2 ATC RTF (MTSAT) M3 ATC RTF (Iridium) N No COM/NAV equipment for the route carried or is unserviceable. O VOR
A 5-tube superheterodyne receiver manufactured by Toshiba circa 1955 Superheterodyne transistor radio circuit circa 1975. A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.
The U.S. Federal Aviation Administration's (FAA) Instrument Flying Handbook defines IFR as: "Rules and regulations established by the FAA to govern flight under conditions in which flight by outside visual reference is not safe. IFR flight depends upon flying by reference to instruments in the flight deck, and navigation is accomplished by ...