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A Halbach array ( German: [ˈhalbax]) is a special arrangement of permanent magnets that augments the magnetic field on one side of the array while cancelling the field to near zero on the other side. [1] [2] This is achieved by having a spatially rotating pattern of magnetisation. The rotating pattern of permanent magnets (on the front face ...
Magnetic storage. Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads .
The flexi disc (also known as a phonosheet, Sonosheet or Soundsheet, a trademark) is a phonograph record made of a thin, flexible vinyl sheet with a molded-in spiral stylus groove, and is designed to be playable on a normal phonograph turntable. Flexible records were commercially introduced as the Eva-tone Soundsheet in 1962.
Inkjet technology. Inkjet technology originally was invented for depositing aqueous inks on paper in 'selective' positions based on the ink properties only. Inkjet nozzles and inks were designed together and the inkjet performance was based on a design. It was used as a data recorder in the early 1950s, [1] later in the 1950s co-solvent-based ...
LP record. The LP (from "long playing" [ 1] or "long play") is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33⁄ rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk.
A magnetic cartridge, more commonly called a phonograph cartridge or phono cartridge or (colloquially) a pickup, is an electromechanical transducer that is used to play phonograph records on a turntable . The cartridge contains a removable or permanently mounted stylus, the tip - usually a gemstone, such as diamond or sapphire - of which makes ...
Acetate disc. An acetate disc (also known as a lacquer, test acetate, dubplate, or transcription disc) is a type of phonograph record generally used from the 1930s to the late 1950s for recording and broadcast purposes. Despite their name, "acetate" discs do not contain any acetate . Lacquer-coated discs are used for the production of records.
In computing, magnetic-core memory is a form of random-access memory. It predominated for roughly 20 years between 1955 and 1975, and is often just called core memory, or, informally, core . Core memory uses toroids (rings) of a hard magnetic material (usually a semi-hard ferrite ). Each core stores one bit of information.
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