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Magnetic Tape
Magnetic tape
Magnetic tape
is a medium for magnetic recording, made of a thin, magnetizable coating on a long, narrow strip of plastic film. It was developed in Germany
Germany
in 1928, based on magnetic wire recording. Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders. A device that stores computer data on magnetic tape is known as a tape drive. Magnetic tape
Magnetic tape
revolutionized broadcast and recording. It allowed radio, which had always been broadcast live, to be recorded for later or repeated airing. It allowed gramophone records to be recorded in multiple parts, which were then mixed and edited with tolerable loss in quality
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UNIVAC I
The UNIVAC I
UNIVAC I
(Universal Automatic Computer I) was the first commercial computer produced in the United States.[1] It was designed principally by J. Presper Eckert and John Mauchly, the inventors of the ENIAC. Design work was started by their company, Eckert–Mauchly Computer Corporation (EMCC), and was completed after the company had been acquired by Remington Rand
Remington Rand
(which later became part of Sperry, now Unisys). In the years before successor models of the UNIVAC I appeared, the machine was simply known as "the UNIVAC".[2] The first Univac was accepted by the United States
United States
Census Bureau on March 31, 1951, and was dedicated on June 14 that year.[3][4] The fifth machine (built for the U.S. Atomic Energy Commission) was used by CBS
CBS
to predict the result of the 1952 presidential election
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Oberlin Smith
Oberlin Smith
Oberlin Smith
(March 22, 1840 – July 19, 1926) was an American engineer who published one of the earliest works dealing with magnetic recording in 1888.Contents1 Biography 2 Magnetic recording 3 References 4 External linksBiography[edit] He was born on March 22, 1840 in Cincinnati, Ohio. He started a small machine shop in Bridgeton, New Jersey, where he lived most of his life, which became known as the Ferracute Machine Company in 1877.[1] For the entire existence of the company he was the president and chief engineer. He died on July 19, 1926 in New Jersey. Magnetic recording[edit] On September
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Time Shifting
In broadcasting, time shifting is the recording of programming to a storage medium to be viewed or listened to after the live broadcasting. Typically, this refers to TV programming but can also refer to radio shows via podcasts. In recent years, the advent of the digital video recorder (DVR) has made time shifting easier, by using an electronic program guide (EPG) and recording shows onto a hard disk. Some DVRs have other possible time shifting methods, such as being able to start watching the recorded show from the beginning even if the recording is not yet complete
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Random Access
In computer science, random access (more precisely and more generally called direct access) is the ability to access any item of data from a population of addressable elements roughly as easily and efficiently as any other, no matter how many elements may be in the set. It is typically contrasted to sequential access. For example, data might be stored notionally in a single sequence like a row, in two dimensions like rows and columns on a surface, or in multiple dimensions. However, given all the coordinates, a program can access each record about as quickly and easily as any other. In this sense the choice of data item is arbitrary in the sense that no matter which item is sought, all that is needed to find it, is its address, that is to say, the coordinates at which it is located, such as its row and column (or its track and record number on a magnetic drum)
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Digital Video Recorder
A digital video recorder (DVR) is an electronic device that records video in a digital format to a disk drive, USB flash drive, SD memory card, SSD
SSD
or other local or networked mass storage device. The term includes set-top boxes with direct to disk recording, portable media players and TV gateways with recording capability, and digital camcorders.[1] Personal computers are often connected to video capture devices and used as DVRs; in such cases the application software used to record video is an integral part of the DVR
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Optical Disc
In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc which encodes binary data (bits) in the form of pits (binary value of 0 or off, due to lack of reflection when read) and lands (binary value of 1 or on, due to a reflection when read) on a special material (often aluminium[1] ) on one of its flat surfaces. The encoding material sits atop a thicker substrate (usually polycarbonate) which makes up the bulk of the disc and forms a dust defocusing layer. The encoding pattern follows a continuous, spiral path covering the entire disc surface and extending from the innermost track to the outermost track
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Quadruplex Videotape
Quadruplex may refer to:Quadruplex, softball complex in New Orleans City Park Quadruplex telegraph, an improvement on the electrical telegraph patented in 1874 by Thomas Edison Two-inch quadruplex videotape, the first practical and commercially successful videotape format G-quadruplex, the four-stranded nucleic acid structure that is, among scientists, sometimes referred to as a quadruplex."Quadruplex" can also refer to a building split into four apartments, similar to a duplexThis disambiguation page lists articles associated with the title Quadruplex. If an internal link led you here, you may wish to change the link to po
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Charles Ginsburg
Charles Paulson Ginsburg (July 27, 1920 – April 9, 1992) was an engineer and the leader of a research team at Ampex
Ampex
which developed one of the first practical videotape recorders.[1] The engineering team that created the videotape recorder when they worked for Ampex under his direction were Charles Andersen, Ray Dolby, Shelby Henderson, Fred Pfost, and the late Alex Maxey.Contents1 Biography 2 Honors and Awards 3 US Patents 4 ReferencesBiography[edit] He was born on July 27, 1920 in San Francisco, California. Ginsburg earned a bachelor's degree from San José State University
San José State University
in 1948. He worked as an engineer at AM-radio station KQW (now KCBS)
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Bandwidth (signal Processing)
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies. It is typically measured in hertz, and depending on context, may specifically refer to passband bandwidth or baseband bandwidth. Passband
Passband
bandwidth is the difference between the upper and lower cutoff frequencies of, for example, a band-pass filter, a communication channel, or a signal spectrum
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Richard H. Ranger
Richard Howland Ranger (13 June 1889 – 10 January 1962) was an American electrical engineer, music engineer and inventor. He was born in Indianapolis, Indiana, the son of John Hilliard and Emily Anthen Gillet Ranger, He served in the U.S. Army Signal Corps
U.S. Army Signal Corps
during World War I, earning the rank of Major. After the war, he attended the Massachusetts Institute of Technology
Massachusetts Institute of Technology
(MIT) from 1919 to 1923.Contents1 Biography 2 See also 3 References 4 External linksBiography[edit] As a designer for the Radio Corporation of America
Radio Corporation of America
(RCA), in 1924, Richard Ranger invented the wireless photoradiogram, or transoceanic radio facsimile, the forerunner of today’s fax machines
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Plastic Film
Plastic
Plastic
film is a thin continuous polymeric material. Thicker plastic material is often called a “sheet”. These thin plastic membranes are used to separate areas or volumes, to hold items, to act as barriers, or as printable surfaces. Plastic
Plastic
films are used in a wide variety of applications. These include: packaging, plastic bags, labels, building construction, landscaping, electrical fabrication, photographic film, film stock for movies, video tape, etc.Contents1 Materials 2 Processes 3 Further processing 4 See also 5 References5.1 Standards by ASTM International 5.2 Books and general referencesMaterials[edit] Almost all plastics can be formed into a thin film
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BASF
Coordinates: 49°29′47″N 8°25′57″E / 49.49639°N 8.43250°E / 49.49639; 8.43250 BASF
BASF
SETypeSocietas EuropaeaTraded as FWB: BAS DAX
DAX
ComponentIndustry ChemicalsFounded 6 April 1865; 152 years ago
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Vicalloy
Vicalloy is a family of cobalt-iron-vanadium wrought permanently magnetic alloys. Vicalloy is precipitation hardened and can be formed by a number of cold working techniques. It is commonly used in electromechanical device applications, such as Wiegand wires because it shows a large Wiegand effect. It consists of 0.03% carbon, 0.4% manganese, 0.2% silicon, 52% cobalt, 10% vanadium; the balance (37.37%) is iron. 'Vicalloy' was used in hysteresis motors both in solid and laminated form (for higher frequency applications) by Vactric Ltd,and Walter Jones Ltd,- neither company still exist- using material produced and processed by Telcon Ltd, Crawley, UK, - now owned by Carpenter from about 2008.'Electrical Times', UK, published an article 'Magnetic Alloys for Hysteresis Motors' by D.R. Driver on 10 August 1967 which includes some magnetic charicteristics of Vically and P6 alloy
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AEG
Allgemeine Elektricitäts-Gesellschaft AG[1] (AEG) (German: "General electricity company") was a German producer of electrical equipment founded as the Deutsche Edison-Gesellschaft für angewandte Elektricität in 1883 in Berlin
Berlin
by Emil Rathenau. After World War II its headquarters moved to Frankfurt
Frankfurt
am Main. In 1967 AEG
AEG
joined with its subsidiary Telefunken
Telefunken
AG creating Allgemeine Elektricitäts-Gesellschaft AEG-Telefunken. In 1985 Daimler-Benz
Daimler-Benz
purchased the AEG- Telefunken
Telefunken
Aktiengesellschaft, which was renamed to AEG
AEG
Aktiengesellschaft
Aktiengesellschaft
and wholly integrated the company in 1996 into Daimler-Benz
Daimler-Benz
AG (1998:DaimlerChrysler)
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Iron Oxide
Iron
Iron
oxides are chemical compounds composed of iron and oxygen. All together, there are sixteen known iron oxides and oxyhydroxides.[1] Iron
Iron
oxides and oxide-hydroxides are widespread in nature, play an important role in many geological and biological processes, and are widely used by humans, e.g., as iron ores, pigments, catalysts, in thermite (see the diagram) and hemoglobin. Common rust is a form of iron(III) oxide. Iron
Iron
oxides are widely used as inexpensive, durable pigments in paints, coatings and colored concretes. Colors commonly available are in the "earthy" end of the yellow/orange/red/brown/black range
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