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  2. International Reference Ionosphere - Wikipedia

    en.wikipedia.org/wiki/International_Reference...

    For a specified geographic location, time, and date, IRI provides average monthly values for electron density, electron temperature and ion temperature, and the molecular composition of the ions in the range of altitudes from 50 km to 2000 km. [1] The latest standard is IRI-2012. [1] [2] A new version, IRI-2016, has since been released. [3]

  3. Hot-filament ionization gauge - Wikipedia

    en.wikipedia.org/wiki/Hot-filament_ionization_gauge

    This ion current differs for different gases at the same pressure; that is, a hot-filament ionization gauge is composition-dependent. Over a wide range of molecular density, however, the ion current from a gas of constant composition is directly proportional to the molecular density of the gas in the gauge.

  4. Minimax Limited - Wikipedia

    en.wikipedia.org/wiki/Minimax_Limited

    The preserved Art Deco gateway from the factory overlooking 'Minimax Corner' Minimax Limited was a British manufacturer of fire extinguishers founded in England in 1903. . Their unique conical fire extinguisher was known as 'The Min

  5. The Pyrene Company Limited - Wikipedia

    en.wikipedia.org/wiki/The_Pyrene_Company_Limited

    The Pyrene Company Limited from their beginning in 1914, until 1971 when they became Chubb Fire Security Limited, were among the world's leaders in the manufacture of fire fighting equipment. The name Pyrene was epitomised by their famous 'pump' extinguisher which was installed on public transport, commercial and private vehicles throughout the ...

  6. Ionosphere - Wikipedia

    en.wikipedia.org/wiki/Ionosphere

    Relationship of the atmosphere and ionosphere. The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) [1] [2] is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, [3] a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar ...

  7. Sura Ionospheric Heating Facility - Wikipedia

    en.wikipedia.org/wiki/Sura_Ionospheric_Heating...

    The Sura Ionospheric Heating Facility, located near the small town of Vasilsursk about 100 km (60 miles) eastward from Nizhniy Novgorod in Russia, is a laboratory for ionosphere research. [1] Sura is capable of radiating about 80 megawatts at 4.3 MHz, increasing to 260 megawatts at 9.5 MHz.

  8. Condensed aerosol fire suppression - Wikipedia

    en.wikipedia.org/wiki/Condensed_aerosol_fire...

    Fire tetrahedron. Hot, condensed aerosol fire-extinguishing agents act on both physical and chemical levels. They leverage four methods to extinguish fires, for they act on the four elements of what is known as the fire tetrahedron. These four means of fire extinction are: Reduction or isolation of fuel; Reduction or isolation of oxygen ...

  9. Global atmospheric electrical circuit - Wikipedia

    en.wikipedia.org/wiki/Global_atmospheric...

    The basic concept of a global circuit is that through the balance of thunderstorms and fair weather, the atmosphere is subject to a continual and substantial electrical current. Principally, thunderstorms throughout the world carry negative charges to the ground, which is then discharged gradually through the air away from the storms, in ...

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