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  2. Ethernet over twisted pair - Wikipedia

    en.wikipedia.org/wiki/Ethernet_over_twisted_pair

    A 10BASE-T or 100BASE-TX host normally uses connector wiring called medium dependent interface (MDI), transmitting on pins 1 and 2 and receiving on pins 3 and 6. An infrastructure node (such as a hub or a switch) normally uses the complementary wiring arrangement, called MDI-X, the X standing for -crossover. MDI-X simply reverses the pairs ...

  3. Point-to-point construction - Wikipedia

    en.wikipedia.org/wiki/Point-to-point_construction

    Sometimes true point-to-point wiring—without terminal strips—with very short connections, is still used at very high radio frequencies (in the gigahertz range) to minimise stray capacitance and inductance; the capacitance between a circuit-board trace and some other conductor, and the inductance of a short track, become significant or ...

  4. Thermodynamic diagrams - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_diagrams

    The main feature of thermodynamic diagrams is the equivalence between the area in the diagram and energy. When air changes pressure and temperature during a process and prescribes a closed curve within the diagram the area enclosed by this curve is proportional to the energy which has been gained or released by the air.

  5. Electrical equipment in hazardous areas - Wikipedia

    en.wikipedia.org/wiki/Electrical_equipment_in...

    The plan may contain the list of chemicals with their group and temperature rating. The classification process requires the participation of operations, maintenance, safety, electrical and instrumentation professionals; and the use of process diagrams, material flows, safety data sheets, and other pertinent documents. Area classification ...

  6. Volkswagen Transporter (T4) - Wikipedia

    en.wikipedia.org/wiki/Volkswagen_Transporter_(T4)

    Introduced in 1990, the T4 was the first Volkswagen van to have a front-mounted, water-cooled engine. Prompted by the success of similar moves with their passenger cars, Volkswagen had toyed with the idea of replacing their air-cooled, rear-engined T2 vans with a front-engined, water-cooled design in the late 1970s.

  7. Hypothalamic–pituitary–thyroid axis - Wikipedia

    en.wikipedia.org/wiki/Hypothalamic–pituitary...

    The pituitary gland secretes thyrotropin (TSH; Thyroid Stimulating Hormone) that stimulates the thyroid to secrete thyroxine (T4) and, to a lesser degree, triiodothyronine (T3). The major portion of T3, however, is produced in peripheral organs, e.g. liver, adipose tissue, glia and skeletal muscle by deiodination from