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🔗 Vasili Arkhipov – Soviet Navy Officer Who Prevented Nuclear Strike in 1962
Vasily Arkhipov (Russian: Василий Архипов) may refer to:
- Vasily Arkhipov (vice admiral) (1926–1998), Soviet Navy officer credited with casting the single vote that prevented a Soviet nuclear strike
- Vasily Arkhipov (general) (1906–1985), Commander of the 53rd Guards Tank Brigade of the Red Army during World War II, twice Hero of the Soviet Union
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- "Vasili Arkhipov – Soviet Navy Officer Who Prevented Nuclear Strike in 1962" | 2016-12-24 | 92 Upvotes 19 Comments
- "Vasili Arkhipov" | 2013-08-24 | 200 Upvotes 53 Comments
🔗 Censorship by Google
Google and its subsidiary companies, such as YouTube, have removed or omitted information from its services to comply with its company policies, legal demands, and government censorship laws. Google's censorship varies between countries and their regulations, and ranges from advertisements to speeches. Over the years, the search engine's censorship policies and targets have also differed, and have been the source of internet censorship debates.
Numerous governments have asked Google to censor what they publish. In 2012, Google ruled in favor of more than half of the requests they received via court orders and phone calls. This did not include China and Iran who had blocked their site entirely.
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- "Censorship by Google" | 2020-05-19 | 59 Upvotes 17 Comments
🔗 Stationary Bandit Theory
Theory of the Stationary Bandit — theory of the origin of the state, developed by American scholars Martin C. McGuire and Mansur Olson.
🔗 Karnaugh map
The Karnaugh map (KM or K-map) is a method of simplifying Boolean algebra expressions. Maurice Karnaugh introduced it in 1953 as a refinement of Edward Veitch's 1952 Veitch chart, which actually was a rediscovery of Allan Marquand's 1881 logical diagram aka Marquand diagram but with a focus now set on its utility for switching circuits. Veitch charts are therefore also known as Marquand–Veitch diagrams, and Karnaugh maps as Karnaugh–Veitch maps (KV maps).
The Karnaugh map reduces the need for extensive calculations by taking advantage of humans' pattern-recognition capability. It also permits the rapid identification and elimination of potential race conditions.
The required Boolean results are transferred from a truth table onto a two-dimensional grid where, in Karnaugh maps, the cells are ordered in Gray code, and each cell position represents one combination of input conditions, while each cell value represents the corresponding output value. Optimal groups of 1s or 0s are identified, which represent the terms of a canonical form of the logic in the original truth table. These terms can be used to write a minimal Boolean expression representing the required logic.
Karnaugh maps are used to simplify real-world logic requirements so that they can be implemented using a minimum number of physical logic gates. A sum-of-products expression can always be implemented using AND gates feeding into an OR gate, and a product-of-sums expression leads to OR gates feeding an AND gate. Karnaugh maps can also be used to simplify logic expressions in software design. Boolean conditions, as used for example in conditional statements, can get very complicated, which makes the code difficult to read and to maintain. Once minimised, canonical sum-of-products and product-of-sums expressions can be implemented directly using AND and OR logic operators. Diagrammatic and mechanical methods for minimizing simple logic expressions have existed since at least the medieval times. More systematic methods for minimizing complex expressions began to be developed in the early 1950s, but until the mid to late 1980s the Karnaugh map was the most common used in practice.
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- "Karnaugh map" | 2017-12-24 | 66 Upvotes 24 Comments
🔗 Shot tower
A shot tower is a tower designed for the production of small diameter shot balls by freefall of molten lead, which is then caught in a water basin. The shot is primarily used for projectiles in shotguns, and also for ballast, radiation shielding and other applications where small lead balls are useful.
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- "Shot tower" | 2013-09-12 | 269 Upvotes 79 Comments
🔗 Paternoster
Pater Noster, or the Lord's Prayer, is a prayer in Christianity.
Pater Noster or Paternoster may also refer to:
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- "Paternoster" | 2015-03-29 | 127 Upvotes 72 Comments
🔗 The Carpet Makers
The Carpet Makers (German original title: Die Haarteppichknüpfer), also published under the title The Hair Carpet Weavers, is a science fiction novel by German writer Andreas Eschbach, originally published in 1995. The first English language edition, released in 2005 by Tor Books, features a foreword by Orson Scott Card.
The book is set on a planet whose sole industry is weaving elaborate rugs. The carpets are made of human hair and require a lifetime of work to complete. The book is a series of inter-related stories that give increasingly more detail on the nature and purpose of the rugs and why the universe has tens of thousands of planets solely devoted to making such a thing, each thinking they are the only one.
There is a prequel to The Carpet Makers titled Quest (2001), which has not been translated into English so far.
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- "The Carpet Makers" | 2023-09-21 | 26 Upvotes 4 Comments
🔗 Organopónicos
Organopónicos or organoponics is a system of urban agriculture using organic gardens. It originated in Cuba and is still mostly focused there. It often consists of low-level concrete walls filled with organic matter and soil, with lines of drip irrigation laid on the surface of the growing media. Organopónicos is a labour-intensive form of local agriculture.
Organopónico farmers employ a wide variety of agroecological techniques including integrated pest management, polyculture, and crop rotation. Most organic materials are also produced within the gardens through composting. This allows production to take place with few petroleum-based inputs.
Organopónicos first arose as a community response to lack of food security during the Special Period after the collapse of the Soviet Union. It is publicly functioning in terms of ownership, access, and management, but heavily subsidized and supported by the Cuban government.
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- "Organopónicos" | 2021-07-31 | 42 Upvotes 10 Comments
🔗 The Prisoner
The Prisoner is a 1967 British television series about an unnamed British intelligence agent who is abducted and imprisoned in a mysterious coastal village, where his captors designate him as Number Six and try to find out why he abruptly resigned from his job. Patrick McGoohan played the lead role as Number Six. The series was created by McGoohan with possible contributions from George Markstein. Episode plots have elements of science fiction, allegory, and psychological drama, as well as spy fiction. It was produced by Everyman Films for distribution by Lew Grade's ITC Entertainment.
A single series of 17 episodes was filmed between September 1966 and January 1968, with exterior location filming in Portmeirion, Wales. Interior scenes were filmed at MGM-British Studios in Borehamwood, north of London. The series was first broadcast in Canada beginning on 5 September 1967, in the UK on 29 September 1967, and in the US on 1 June 1968. Although the show was sold as a thriller in the mould of the previous series starring McGoohan, Danger Man, its combination of 1960s countercultural themes and surrealistic setting had a far-reaching influence on science fiction and fantasy TV programming, and on narrative popular culture in general. Since its initial screening, the series has developed a cult following.
A six-part TV miniseries remake aired on the US cable channel AMC in November 2009. In 2016, Big Finish Productions reinterpreted the series as an audio drama.
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- "The Prisoner" | 2022-12-14 | 20 Upvotes 10 Comments