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π ACT-R: A cognitive architecture
ACT-R (pronounced /ΛΓ¦kt ΛΙr/; short for "Adaptive Control of ThoughtβRational") is a cognitive architecture mainly developed by John Robert Anderson and Christian Lebiere at Carnegie Mellon University. Like any cognitive architecture, ACT-R aims to define the basic and irreducible cognitive and perceptual operations that enable the human mind. In theory, each task that humans can perform should consist of a series of these discrete operations.
Most of the ACT-R's basic assumptions are also inspired by the progress of cognitive neuroscience, and ACT-R can be seen and described as a way of specifying how the brain itself is organized in a way that enables individual processing modules to produce cognition.
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- "ACT-R: A cognitive architecture" | 2015-12-17 | 20 Upvotes 4 Comments
π Nobel Disease
Nobel disease or Nobelitis is the embracing of strange or scientifically unsound ideas by some Nobel Prize winners, usually later in life. It has been argued that the effect results, in part, from a tendency for Nobel winners to feel empowered by the award to speak on topics outside their specific area of expertise, although it is unknown whether Nobel Prize winners are more prone to this tendency than other individuals. Paul Nurse, co-winner of the 2001 Nobel Prize in Physiology or Medicine, warned later laureates against "believing you are expert in almost everything, and being prepared to express opinions about most issues with great confidence, sheltering behind the authority that the Nobel Prize can give you". Nobel disease has been described as a "tongue in cheek" term.
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- "Nobel Disease" | 2023-07-15 | 12 Upvotes 4 Comments
- "Nobel Disease" | 2021-09-29 | 23 Upvotes 5 Comments
π Eidophor
An Eidophor was a television projector used to create theater-sized images from an analog video signal. The name Eidophor is derived from the Greek word-roots eido and phor meaning 'image' and 'bearer' (carrier). Its basic technology was the use of electrostatic charges to deform an oil surface.
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- "Eidophor" | 2019-09-21 | 96 Upvotes 13 Comments
π Regular Heptadecagon Inscribed in a Circle
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- "Regular Heptadecagon Inscribed in a Circle" | 2010-04-15 | 44 Upvotes 13 Comments
π Christopher Monsanto gives up trying to delete PL articles
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- "Christopher Monsanto gives up trying to delete PL articles" | 2011-02-14 | 173 Upvotes 131 Comments
π Curb Cut Effect
The curb cut effect is the phenomenon of disability-friendly features being used and appreciated by a larger group than the people they were designed for. For example, many hearing people use closed captioning. The phenomenon is named for curb cutsΒ β miniature ramps comprising parts of sidewalkΒ β which were first made for wheelchair access in particular places, but are now universal and no longer widely recognized as a disability-accessibility feature.
The curb cut effect is a subset of universal design, which is the purposeful design of an environment so that it is accessible to all people regardless of ability or disability. The curb cut effect differs slightly from universal design as the curb cut phenomenon is often unintentional rather than purposeful, but results in a similar outcome.
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- "Curb Cut Effect" | 2024-02-23 | 55 Upvotes 1 Comments
π John von Neumann
John von Neumann (; Hungarian: Neumann JΓ‘nos Lajos, pronouncedΒ [ΛnΙjmΙn ΛjaΛnoΚ ΛlΙjoΚ]; December 28, 1903Β β FebruaryΒ 8, 1957) was a Hungarian-American mathematician, physicist, computer scientist, engineer and polymath. Von Neumann was generally regarded as the foremost mathematician of his time and said to be "the last representative of the great mathematicians"; who integrated both pure and applied sciences.
He made major contributions to a number of fields, including mathematics (foundations of mathematics, functional analysis, ergodic theory, representation theory, operator algebras, geometry, topology, and numerical analysis), physics (quantum mechanics, hydrodynamics, and quantum statistical mechanics), economics (game theory), computing (Von Neumann architecture, linear programming, self-replicating machines, stochastic computing), and statistics.
He was a pioneer of the application of operator theory to quantum mechanics in the development of functional analysis, and a key figure in the development of game theory and the concepts of cellular automata, the universal constructor and the digital computer.
He published over 150 papers in his life: about 60 in pure mathematics, 60 in applied mathematics, 20 in physics, and the remainder on special mathematical subjects or non-mathematical ones. His last work, an unfinished manuscript written while he was in hospital, was later published in book form as The Computer and the Brain.
His analysis of the structure of self-replication preceded the discovery of the structure of DNA. In a short list of facts about his life he submitted to the National Academy of Sciences, he stated, "The part of my work I consider most essential is that on quantum mechanics, which developed in GΓΆttingen in 1926, and subsequently in Berlin in 1927β1929. Also, my work on various forms of operator theory, Berlin 1930 and Princeton 1935β1939; on the ergodic theorem, Princeton, 1931β1932."
During World War II, von Neumann worked on the Manhattan Project with theoretical physicist Edward Teller, mathematician StanisΕaw Ulam and others, problem solving key steps in the nuclear physics involved in thermonuclear reactions and the hydrogen bomb. He developed the mathematical models behind the explosive lenses used in the implosion-type nuclear weapon, and coined the term "kiloton" (of TNT), as a measure of the explosive force generated.
After the war, he served on the General Advisory Committee of the United States Atomic Energy Commission, and consulted for a number of organizations, including the United States Air Force, the Army's Ballistic Research Laboratory, the Armed Forces Special Weapons Project, and the Lawrence Livermore National Laboratory. As a Hungarian Γ©migrΓ©, concerned that the Soviets would achieve nuclear superiority, he designed and promoted the policy of mutually assured destruction to limit the arms race.
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- "John von Neumann" | 2015-06-26 | 20 Upvotes 3 Comments
π 100 years ago today, the battle of Blair Mountain
The Battle of Blair Mountain was the largest labor uprising in United States history and the largest armed uprising since the American Civil War. The conflict occurred in Logan County, West Virginia, as part of the Coal Wars, a series of early-20th-century labor disputes in Appalachia. Up to 100 people were killed, and many more arrested. The United Mine Workers saw major declines in membership, but the long-term publicity led to some improvements in working conditions.
For five days from late August to early September 1921, some 10,000 armed coal miners confronted 3,000 lawmen and strikebreakers (called the Logan Defenders) who were backed by coal mine operators during the miners' attempt to unionize the southwestern West Virginia coalfields when tensions rose between workers and mine management. The battle ended after approximately one million rounds were fired and the United States Army, represented by the West Virginia Army National Guard led by McDowell County native William Eubanks, intervened by presidential order.
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- "100 years ago today, the battle of Blair Mountain" | 2021-08-25 | 11 Upvotes 1 Comments
π Hindenburg Omen (Occurred Twice this Month)
The Hindenburg Omen was a proposed technical analysis pattern, named after the Hindenburg disaster of May 6, 1937. It was created by Jim Miekka, who believed that it portended a stock market crash.
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- "Hindenburg Omen (Occurred Twice this Month)" | 2010-08-17 | 40 Upvotes 19 Comments
π Isotype picture language
Isotype (International System of Typographic Picture Education) is a method of showing social, technological, biological, and historical connections in pictorial form. It consists of a set of standardized and abstracted pictorial symbols to represent social-scientific data with specific guidelines on how to combine the identical figures using serial repetition. It was first known as the Vienna Method of Pictorial Statistics (Wiener Methode der Bildstatistik), due to its having been developed at the Gesellschafts- und Wirtschaftsmuseum in Wien (Social and Economic Museum of Vienna) between 1925 and 1934. The founding director of this museum, Otto Neurath, was the initiator and chief theorist of the Vienna Method. Gerd Arntz was the artist responsible for realising the graphics. The term Isotype was applied to the method around 1935, after its key practitioners were forced to leave Vienna by the rise of Austrian fascism.
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- "Isotype picture language" | 2015-11-12 | 10 Upvotes 1 Comments