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  2. Instantaneous wave-free ratio - Wikipedia

    en.wikipedia.org/wiki/Instantaneous_wave-free_ratio

    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 ...

  3. File:IFR calculation.pdf - Wikipedia

    en.wikipedia.org/wiki/File:IFR_calculation.pdf

    iFR calculation figure.pptx: Image title: Author: Sukhjinder Nijjer: Software used: PowerPoint: Conversion program: Mac OS X 10.8.5 Quartz PDFContext: Encrypted: no: Page size: 842 x 595 pts (A4) Version of PDF format: 1.3

  4. Aeroflex - Wikipedia

    en.wikipedia.org/wiki/Aeroflex

    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 ...

  5. Dick's Picks Volume 19 - Wikipedia

    en.wikipedia.org/wiki/Dick's_Picks_Volume_19

    The release includes two sheets of paper stapled together in the middle, yielding an eight-page enclosure. The front duplicates the cover of the CD and the back shows the outline of a white circular stealie superimposed on a color photograph of the prairie with a fence stretching out into the distance and a tornado forming in the sky above it.

  6. Superheterodyne receiver - Wikipedia

    en.wikipedia.org/wiki/Superheterodyne_receiver

    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.

  7. List of transponder codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Transponder_Codes

    Operations above FL600 for SR-71/U-2 operations from Edwards AFB. [3] 4453 US: High balloon operations: National Scientific Balloon Facility in Palestine, Texas; and other providers, some in international operations. [3] 4454–4465 US: Air Force operations above FL600 as designated in FAA Order 7610.4. [3] 4466–4477 US

  8. Instrument flight rules - Wikipedia

    en.wikipedia.org/wiki/Instrument_flight_rules

    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 ...

  9. List of installation software - Wikipedia

    en.wikipedia.org/wiki/List_of_installation_software

    InstallCore [2] Discontinued Software as a service: No InstallShield: Flexera Software: Active Trialware: Yes Yes No Advanced Installer Caphyon Active Trialware: Yes Yes Yes NSIS: Nullsoft: Active zlib License: No No Orca (Part of Windows SDK) Microsoft: Active Freeware (proprietary) Yes; exclusively Wise: Wise Solutions, Inc. Discontinued Non ...