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  2. Waveguide (radio frequency) - Wikipedia

    en.wikipedia.org/wiki/Waveguide_(radio_frequency)

    In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. [1] This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave ...

  3. Bluetooth - Wikipedia

    en.wikipedia.org/wiki/Bluetooth

    Bluetooth operates at frequencies between 2.402 and 2.480 GHz, or 2.400 and 2.4835 GHz, including guard bands 2 MHz wide at the bottom end and 3.5 MHz wide at the top. [25] This is in the globally unlicensed (but not unregulated) industrial, scientific and medical ( ISM ) 2.4 GHz short-range radio frequency band.

  4. Specific absorption rate - Wikipedia

    en.wikipedia.org/wiki/Specific_absorption_rate

    SAR measures exposure to fields between 100 kHz and 10 GHz (known as radio waves). [2] It is commonly used to measure power absorbed from mobile phones and during MRI scans. The value depends heavily on the geometry of the part of the body that is exposed to the RF energy and on the exact location and geometry of the RF source.

  5. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    Rule 8: The P wave is upright in I II and V2 to V6. Rule 9: There is no Q wave or only a small q (<0.04 seconds in width) in I, II and V2 to V6. Rule 10: The T wave is upright in I II and V2 to V6. The end of the T wave should not drop below the isoelectric baseline.

  6. Nintendo Entertainment System - Wikipedia

    en.wikipedia.org/wiki/Nintendo_Entertainment_System

    In 1989, Nintendo released an official NES Cleaning Kit to help users clean malfunctioning cartridges and consoles. In response to these hardware flaws, "Nintendo Authorized Repair Centers" sprang up across the U.S. According to Nintendo, the authorization program was designed to ensure that the machines were properly repaired.

  7. Java version history - Wikipedia

    en.wikipedia.org/wiki/Java_version_history

    The release on December 8, 1998 and subsequent releases through J2SE 5.0 were rebranded retrospectively Java 2 and the version name "J2SE" (Java 2 Platform, Standard Edition) replaced JDK to distinguish the base platform from J2EE (Java 2 Platform, Enterprise Edition) and J2ME (Java 2 Platform, Micro Edition). This was a very significant ...

  8. Houdini (software) - Wikipedia

    en.wikipedia.org/wiki/Houdini_(software)

    Houdini is a 3D animation software application developed by Toronto-based SideFX, who adapted it from the PRISMS suite of procedural generation software tools.. The procedural tools are used to produce different effects such as complex reflections, animations and particles system. [2]

  9. Toyota NZ engine - Wikipedia

    en.wikipedia.org/wiki/Toyota_NZ_engine

    Bore and stroke is 75 mm × 84.7 mm (2.95 in × 3.33 in). It features forged steel connecting rods and an aluminum intake manifold . The engine has a high physical compression ratio of 13.0:1, but the closing of the inlet valve is delayed, for an effective compression ratio of 9.5:1. [ 11 ]