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๐ Galton Board
The bean machine, also known as the Galton Board or quincunx, is a device invented by Sir Francis Galton to demonstrate the central limit theorem, in particular that with sufficient sample size the binomial distribution approximates a normal distribution. Among its applications, it afforded insight into regression to the mean or "regression to mediocrity".
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- "Galton Board" | 2019-06-18 | 98 Upvotes 30 Comments
๐ Digital physics
In physics and cosmology, digital physics is a collection of theoretical perspectives based on the premise that the universe is describable by information. It is a form of digital ontology about the physical reality. According to this theory, the universe can be conceived of as either the output of a deterministic or probabilistic computer program, a vast, digital computation device, or mathematically isomorphic to such a device.
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- "Digital physics" | 2013-08-06 | 62 Upvotes 54 Comments
๐ Kevinism
Kevinism and Chantalism jokingly describe the tendency of parents in German-speaking areas to name their children with what appears to them to be unusual, exotic-sounding first names.
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- "Kevinism" | 2021-03-26 | 15 Upvotes 7 Comments
- "Kevinism" | 2019-08-13 | 91 Upvotes 82 Comments
๐ Williams tube โ cathode ray tube used as computer memory
The Williams tube, or the WilliamsโKilburn tube after inventors Freddie Williams and Tom Kilburn, is an early form of computer memory. It was the first random-access digital storage device, and was used successfully in several early computers.
The Williams tube works by displaying a grid of dots on a cathode ray tube (CRT). Due to the way CRTs work, this creates a small charge of static electricity over each dot. The charge at the location of each of the dots is read by a thin metal sheet just in front of the display. Since the display faded over time, it was periodically refreshed. It cycles faster than earlier acoustic delay line memory, at the speed of the electrons inside the vacuum tube, rather than at the speed of sound. However, the system was adversely affected by any nearby electrical fields, and required constant alignment to keep operational. WilliamsโKilburn tubes were used primarily on high-speed computer designs.
Williams and Kilburn applied for British patents on 11 December 1946, and 2 October 1947, followed by United States patent applications on 10 December 1947, and 16 May 1949.
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- "Williams tube โ cathode ray tube used as computer memory" | 2015-11-26 | 57 Upvotes 16 Comments
๐ Amarna Letters
The Amarna letters (; sometimes referred to as the Amarna correspondence or Amarna tablets, and cited with the abbreviation EA, for "El Amarna") are an archive, written on clay tablets, primarily consisting of diplomatic correspondence between the Egyptian administration and its representatives in Canaan and Amurru, or neighboring kingdom leaders, during the New Kingdom, spanning a period of no more than thirty years between c. 1360โ1332 BC (see here for dates). The letters were found in Upper Egypt at el-Amarna, the modern name for the ancient Egyptian capital of Akhetaten, founded by pharaoh Akhenaten (1350sโ1330sย BC) during the Eighteenth Dynasty of Egypt. The Amarna letters are unusual in Egyptological research, because they are written not in the language of ancient Egypt, but in cuneiform, the writing system of ancient Mesopotamia. Most are in a variety of Akkadian sometimes characterised as a mixed language, Canaanite-Akkadian; one especially long letterโabbreviated EA 24โwas written in a late dialect of Hurrian, and is the longest contiguous text known to survive in that language.
The known tablets total 382, of which 358 have been published by the Norwegian Assyriologist Jรธrgen Alexander Knudtzon in his work, Die El-Amarna-Tafeln, which came out in two volumes (1907 and 1915) and remains the standard edition to this day. The texts of the remaining 24 complete or fragmentary tablets excavated since Knudtzon have also been made available.
The Amarna letters are of great significance for biblical studies as well as Semitic linguistics because they shed light on the culture and language of the Canaanite peoples in this time period. Though most are written in Akkadian, the Akkadian of the letters is heavily colored by the mother tongue of their writers, who probably spoke an early form of Proto-Canaanite, the language(s) which would later evolve into the daughter languages of Hebrew and Phoenician. These "Canaanisms" provide valuable insights into the proto-stage of those languages several centuries prior to their first actual manifestation.
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- "Amarna Letters" | 2023-01-14 | 51 Upvotes 6 Comments
๐ The Awful German Language
"The Awful German Language" is an 1880 essay by Mark Twain published as Appendix D in A Tramp Abroad. The essay is a humorous exploration of the frustrations a native speaker of English has with learning German as a second language.
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- "The Awful German Language" | 2021-05-16 | 46 Upvotes 52 Comments
๐ Yes, you can make it work by doing just a little everyday
Ferdinand Cheval (19 April 1836 โ 19 August 1924) was a French postman who spent thirty-three years of his life building Le Palais idรฉal (the "Ideal Palace") in Hauterives. The Palace is regarded as an extraordinary example of naรฏve art architecture.
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- "Yes, you can make it work by doing just a little everyday" | 2011-05-21 | 14 Upvotes 1 Comments
๐ Small-World Experiment
The small-world experiment comprised several experiments conducted by Stanley Milgram and other researchers examining the average path length for social networks of people in the United States. The research was groundbreaking in that it suggested that human society is a small-world-type network characterized by short path-lengths. The experiments are often associated with the phrase "six degrees of separation", although Milgram did not use this term himself.
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- "Small-World Experiment" | 2020-03-15 | 50 Upvotes 3 Comments
๐ Werner Herzog eats his shoe
Werner Herzog Eats His Shoe is a short documentary film directed by Les Blank in 1980 which depicts director Werner Herzog living up to his promise that he would eat his shoe if Errol Morris ever completed the film Gates of Heaven. The film includes clips from both Gates of Heaven and Herzog's 1970 feature Even Dwarfs Started Small. Comic song "Old Whisky Shoes", played by the Walt Solek Band, is the signature tune over the opening and closing credits.
Filmed in April 1979, the film features Herzog cooking his shoes (the ones he claims to have been wearing when he made the bet) at the Berkeley, California restaurant Chez Panisse, with the help of chef Alice Waters. (The shoes were boiled with garlic, herbs, and stock for 5 hours.) He is later shown eating one of the shoes before an audience at the premiere of Gates of Heaven at the nearby UC Theater. He did not eat the sole of the shoe, however, explaining that one does not eat the bones of the chicken.
Morris is not shown in the film, and Herzog, Morris, and others have told different stories of the nature of the bet, disagreeing as to whether it was serious, flippant, or an after-the-fact publicity stunt.
Blank went on to direct Burden of Dreams (1982), a feature-length documentary about Herzog and the making of Fitzcarraldo. Werner Herzog Eats His Shoe is included as an extra on The Criterion Collection edition of the Burden of Dreams DVD. It is also included as an extra in the Criterion Collection edition of the Gates of Heaven Blu-ray disc.
When Chez Panisse celebrated its 40th anniversary, a replica of the shoe was created, boiled, and eaten as part of the public anniversary celebration.
The Academy Film Archive preserved Werner Herzog Eats His Shoe in 1999.
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- "Werner Herzog eats his shoe" | 2022-05-28 | 117 Upvotes 32 Comments
๐ Artificio de Juanelo
The Artificio de Juanelo ("Gianello's artifice") was the name of two devices built in Toledo in the 16th century by Juanelo Turriano. They were designed to supply the city with a source of readily available water by lifting it from the Tagus (Tajo) river to the Alcรกzar. Now in ruins, the precise details of the operation of the devices are unknown, but at the time they were considered engineering wonders.
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- "Artificio de Juanelo" | 2024-04-02 | 96 Upvotes 11 Comments