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  2. Magnetohydrodynamics - Wikipedia

    en.wikipedia.org/wiki/Magnetohydrodynamics

    Electron Magnetohydrodynamics (EMHD) describes small scales plasmas when electron motion is much faster than the ion one. The main effects are changes in conservation laws, additional resistivity, importance of electron inertia. Many effects of Electron MHD are similar to effects of the Two fluid MHD and the Hall MHD.

  3. Tremec TR-6070 transmission - Wikipedia

    en.wikipedia.org/wiki/Tremec_TR-6070_transmission

    The TR-6070 is based on the TREMEC TR-6060 six-speed transmission. A triple overdrive gear was added to improve fuel economy and lower emissions. Incorporated in the TR-6070 is a Gear Absolute Position (GAP) sensor. The technology provides a signal from the transmission to the engine controller, inferring the real-time position of the shift ...

  4. Birkeland current - Wikipedia

    en.wikipedia.org/wiki/Birkeland_current

    A Birkeland current (also known as field-aligned current, FAC) is a set of electrical currents that flow along geomagnetic field lines connecting the Earth's magnetosphere to the Earth's high latitude ionosphere. In the Earth's magnetosphere, the currents are driven by the solar wind and interplanetary magnetic field (IMF) and by bulk motions ...

  5. Current sensing - Wikipedia

    en.wikipedia.org/wiki/Current_sensing

    In electrical engineering, current sensing is any one of several techniques used to measure electric current. The measurement of current ranges from picoamps to tens of thousands of amperes. The selection of a current sensing method depends on requirements such as magnitude, accuracy, bandwidth, robustness, cost, isolation or size.

  6. Transmission control unit - Wikipedia

    en.wikipedia.org/wiki/Transmission_Control_Unit

    Transmission control unit. A transmission control unit (TCU), also known as a transmission control module (TCM), or a gearbox control unit (GCU), is a type of automotive ECU that is used to control electronic automatic transmissions. Similar systems are used in conjunction with various semi-automatic transmissions, purely for clutch automation ...

  7. Magnetotellurics - Wikipedia

    en.wikipedia.org/wiki/Magnetotellurics

    Magnetotellurics (MT) is an electromagnetic geophysical method for inferring the earth 's subsurface electrical conductivity from measurements of natural geomagnetic and geoelectric field variation at the Earth's surface. Investigation depth ranges from 100 m below ground by recording higher frequencies down to 200 km or deeper with long-period ...

  8. Magnetic reconnection - Wikipedia

    en.wikipedia.org/wiki/Magnetic_reconnection

    Magnetic reconnection is a breakdown of "ideal-magnetohydrodynamics" and so of "Alfvén's theorem" (also called the "frozen-in flux theorem") which applies to large-scale regions of a highly-conducting magnetoplasma, for which the Magnetic Reynolds Number is very large: this makes the convective term in the induction equation dominate in such regions.

  9. High-frequency Active Auroral Research Program - Wikipedia

    en.wikipedia.org/wiki/High-frequency_Active...

    The High-frequency Active Auroral Research Program (HAARP) is a University of Alaska Fairbanks program which researches the ionosphere – the highest, ionized part of Earth's atmosphere. The most prominent instrument at HAARP is the Ionospheric Research Instrument (IRI), a high-power radio frequency transmitter facility operating in the high ...

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