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  2. Vacuum fluorescent display - Wikipedia

    en.wikipedia.org/wiki/Vacuum_fluorescent_display

    A vacuum fluorescent display (VFD) is a display device once commonly used on consumer electronics equipment such as video cassette recorders, car radios, and microwave ovens. A VFD operates on the principle of cathodoluminescence , roughly similar to a cathode-ray tube , but operating at much lower voltages.

  3. Visual comparison - Wikipedia

    en.wikipedia.org/wiki/Visual_comparison

    A visual diff or vdiff finds differences between two files by eyeball search.The term optical diff has also been reported, and is sometimes more specifically used for the act of superimposing two nearly identical printouts on one another and holding them up to a light to spot differences.

  4. Comparison of display technology - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_display...

    Different display technologies have vastly different temporal characteristics, leading to perceptual differences of motion, flicker, etc. Sketch of some common display technologies' temporal behaviour. The figure shows a sketch of how different technologies present a single white/grey frame. Time and intensity is not to scale.

  5. Comparison of CRT, LCD, plasma, and OLED displays - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_CRT,_LCD...

    High altitude pressure difference may cause poor function or buzzing noises [38] Can have poor brightness, especially when most of the picture is white [5] Electro-magnetic radiation emission Can emit a small amount of X-ray radiation. Only emits non-ionizing radiation. [39] Emits strong radio frequency electromagnetic radiation [40]

  6. Variable-frequency drive - Wikipedia

    en.wikipedia.org/wiki/Variable-frequency_drive

    Small variable-frequency drive Chassis of above VFD (cover removed). A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, variable voltage variable frequency drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the ...

  7. 2 Stocks to Buy Before 2025 - AOL

    www.aol.com/2-stocks-buy-2025-003155229.html

    Apple. Apple (NASDAQ:AAPL) is a company that people just love to doubt. The stock started 2024 with a pretty expensive multiple, only to end the year with an even pricier one (shares go for almost ...

  8. List of medical abbreviations: V - Wikipedia

    en.wikipedia.org/wiki/List_of_medical...

    VS: vital signs versus visual snow VSD: ventricular septal defect: VSR: ventricular septal rupture (see myocardial rupture) VSS: vital signs stable visual snow syndrome VT: ventricular tachycardia verotoxin VTE: venous thromboembolism: VTEC: verotoxin-producing Escherichia coli, also known as enterohaemorrhagic E. coli: VUR: vesicoureteral ...

  9. Motor drive - Wikipedia

    en.wikipedia.org/wiki/Motor_drive

    With a variable-speed drive on the pump or fan, the supply can be adjusted to match demand and no extra loss is introduced. For example, when a fan is driven directly by a fixed-speed motor, the airflow is designed for the maximum demand of the system, and so will usually be higher than it needs to be.

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