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A scanner (also referred to as a radio scanner) is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them and then continuing to scan other frequencies when the initial transmission ceases. The term scanner generally refers to a communications receiver that is ...
Sheetfed scanners do not have a scanning bed, have a mechanism to feed paper through the scanner, and some are capable of scanning several sheets at once using an ADF, [9] [10] although others only accept one page at a time. [11] A printer cartridge, the Canon IS-22, was released that could be used to convert an inkjet printer into a sheetfed ...
Electron beam computed tomography (EBCT) is a specific form of computed tomography (CT) in which the X-ray tube is not mechanically spun in order to rotate the source of X-ray photons. This different design was explicitly developed to better image heart structures that never stop moving, performing a complete cycle of movement with each heartbeat.
Conical scanning is a system used in early radar units to improve their accuracy, as well as making it easier to steer the antenna properly to point at a target. Conical scanning is similar in concept to the earlier lobe switching concept used on some of the earliest radars, and many examples of lobe switching sets were modified in the field to ...
Slow-scan television ( SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color. A literal term for SSTV is narrowband television. Analog broadcast television requires at least 6 MHz wide channels, because it transmits 25 or 30 picture frames per ...
Fujitsu manufactures two series of image scanners: ScanSnap for consumers/SOHO, and fi for business (fi includes SP brand). [1] Popular ScanSnap models include the S1300, a feature-rich scanner that can scan double-sided color originals, [2] and the S1100, one of the world's smallest scanners. [3] By September 2018, ScanSnap had sold more than ...
The first computed tomography (CT) system capable of producing images of any part of the human body without the need for a cumbersome "water tank" was the Automatic Computerized Transverse Axial (ACTA) scanner, designed by Dr. Robert S. Ledley, DDS, at Georgetown University. This revolutionary machine was equipped with 30 photomultiplier tubes ...
The oldest optical-scan voting systems scan ballots using optical mark recognition scanners. Voters mark their choice in a voting response location, usually filling a rectangle, circle or oval, or by completing an arrow. Various mark-sense voting systems have used a variety of different approaches to determining what marks are counted as votes.