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๐ Atari Video Music
The Atari Video Music (Model C240) is the earliest commercial electronic music visualizer released. It was manufactured by Atari, Inc., and released in 1977 for $169.95. The system creates an animated visual display that responds to musical input from a Hi-Fi stereo system for the visual entertainment of consumers.
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- "Atari Video Music" | 2023-10-29 | 100 Upvotes 26 Comments
๐ Moon Illusion
The Moon illusion is an optical illusion which causes the Moon to appear larger near the horizon than it does higher up in the sky. It has been known since ancient times and recorded by various cultures. The explanation of this illusion is still debated.
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- "Moon Illusion" | 2022-06-12 | 129 Upvotes 71 Comments
๐ Bernoulli discovered e by studying a question about compound interest
The number e is a mathematical constant approximately equal to 2.71828 and is the base of the natural logarithm: the unique number whose natural logarithm is equal to one. It is the limit of (1 + 1/n)n as n approaches infinity, an expression that arises in the study of compound interest. It can also be calculated as the sum of the infinite series
The constant can be characterized in many different ways. For example, it can be defined as the unique positive number a such that the graph of the function y = ax has unit slope at x = 0. The function f(x) = ex is called the (natural) exponential function, and is the unique exponential function equal to its own derivative. The natural logarithm, or logarithm to base e, is the inverse function to the natural exponential function. The natural logarithm of a number k > 1 can be defined directly as the area under the curve y = 1/x between x = 1 and x = k, in which case e is the value of k for which this area equals one (see image). There are alternative characterizations.
e is sometimes called Euler's number after the Swiss mathematician Leonhard Euler (not to be confused with ฮณ, the EulerโMascheroni constant, sometimes called simply Euler's constant), or as Napier's constant. However, Euler's choice of the symbol e is said to have been retained in his honor. The constant was discovered by the Swiss mathematician Jacob Bernoulli while studying compound interest.
The number e has eminent importance in mathematics, alongside 0, 1, ฯ, and i. All five of these numbers play important and recurring roles across mathematics, and these five constants appear in one formulation of Euler's identity. Like the constant ฯ, e is also irrational (i.e. it cannot be represented as ratio of integers) and transcendental (i.e. it is not a root of any non-zero polynomial with rational coefficients). The numerical value of e truncated to 50 decimal places is
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- "Bernoulli discovered e by studying a question about compound interest" | 2012-12-26 | 51 Upvotes 16 Comments
๐ Made in China 2025
Made in China 2025 (Chinese: ไธญๅฝๅถ้ 2025; pinyin: Zhลngguรณzhรฌzร o รจrlรญng'รจrwว) (MIC25, MIC 2025, or MIC2025) is a national strategic plan and industrial policy of the Chinese Communist Party (CCP) to further develop the manufacturing sector of China, issued by CCP general secretary Xi Jinping and Chinese Premier Li Keqiang's cabinet in May 2015. As part of the Thirteenth and Fourteenth Five-year Plans, China aims to move away from being the "world's factory"โa producer of cheap low-tech goods facilitated by lower labour costs and supply chain advantages. The industrial policy aims to upgrade the manufacturing capabilities of Chinese industries, growing from labor-intensive workshops into a more technology-intensive powerhouse.
Made in China 2025's goals include increasing the Chinese-domestic content of core materials to 40 percent by 2020 and 70 percent by 2025. To help achieve independence from foreign suppliers, the initiative encourages increased production in high-tech products and services, with its semiconductor industry central to the industrial plan, partly because advances in chip technology may "lead to breakthroughs in other areas of technology, handing the advantage to whoever has the best chips โ an advantage that currently is out of Beijingโs reach."
Since 2018, following a backlash from the U.S., Europe, and elsewhere, the phrase "MIC 2025" has been de-emphasized in government and other official communications, while the program remains in place. The Chinese government continues to invest heavily in identified technologies. In 2018, the Chinese government committed to investing roughly US$300 billion into achieving the industrial plan. In the wake of the COVID-19 pandemic, at least an additional $1.4 trillion was also invested into MIC 2025 initiatives. Given China's current middle income country status, the practicality of its disproportionate expenditure on pioneering new technologies has been called into question.
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- "Made in China 2025" | 2023-11-17 | 54 Upvotes 98 Comments
๐ Accelerationism
In political and social theory, accelerationism is the idea that capitalism, or particular processes that historically characterised capitalism, should be accelerated instead of overcome in order to generate radical social change. "Accelerationism" may also refer more broadly, and usually pejoratively, to support for the intensification of capitalism in the belief that this will hasten its self-destructive tendencies and ultimately lead to its collapse.
Some contemporary accelerationist philosophy starts with the DeleuzoโGuattarian theory of deterritorialisation, aiming to identify and radicalise the social forces that promote this emancipatory process.
Accelerationist theory has been divided into mutually contradictory left-wing and right-wing variants. "Left-accelerationism" attempts to press "the process of technological evolution" beyond the constrictive horizon of capitalism, for example by repurposing modern technology for socially beneficial and emancipatory ends; "right-accelerationism" supports the indefinite intensification of capitalism itself, possibly in order to bring about a technological singularity. Accelerationist writers have additionally distinguished other variants, such as "unconditional accelerationism".
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- "Accelerationism" | 2019-09-26 | 97 Upvotes 129 Comments
๐ Tartar Relation
The Tartar Relation (Latin: Hystoria Tartarorum, "History of the Tartars") is an ethnographic report on the Mongol Empire composed by a certain C. de Bridia in Latin in 1247. It is one of the most detailed accounts of the history and customs of the Mongols to appear in Europe around that time.
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- "Tartar Relation" | 2021-01-31 | 45 Upvotes 3 Comments
๐ Cat Drop
Operation Cat Drop is the name given to the delivery of some 14,000 cats by the United Kingdom's Royal Air Force to remote regions of the then-British colony of Sarawak (today part of Malaysia), on the island of Borneo in 1960. The cats were flown out of Singapore and delivered in crates dropped by parachutes as part of a broader program of supplying cats to combat a plague of rats. The operation was reported as a "success" at the time. Some newspaper reports published soon after the Operation reference only 23 cats being used. However, later reports state as many as 14,000 cats were used. An additional source references a "recruitment" drive for 30 cats a few days prior to Operation Cat Drop.
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- "Cat Drop" | 2024-01-15 | 42 Upvotes 14 Comments
๐ Stan Lee has died
Stan Lee (born Stanley Martin Lieber ; December 28, 1922ย โ November 12, 2018) was an American comic book writer, editor, publisher, and producer. He rose through the ranks of a family-run business to become Marvel Comics' primary creative leader for two decades, leading its expansion from a small division of a publishing house to a multimedia corporation that dominated the comics industry.
In collaboration with others at Marvelโparticularly co-writer/artists Jack Kirby and Steve Ditkoโhe co-created numerous popular fictional characters, including superheroes Spider-Man, the X-Men, Iron Man, Thor, the Hulk, Black Widow, the Fantastic Four, Black Panther, Daredevil, Doctor Strange, Scarlet Witch and Ant-Man. In doing so, he pioneered a more naturalistic approach to writing superhero comics in the 1960s, and in the 1970s he challenged the restrictions of the Comics Code Authority, indirectly leading to changes in its policies. In the 1980s he pursued the development of Marvel properties in other media, with mixed results. Following his retirement from Marvel in the 1990s, he remained a public figurehead for the company, and frequently made cameo appearances in films and television shows based on Marvel characters, on which he received an executive producer credit. Meanwhile, he continued independent creative ventures into his 90s, until his death in 2018.
Lee was inducted into the comic book industry's Will Eisner Award Hall of Fame in 1994 and the Jack Kirby Hall of Fame in 1995. He received the NEA's National Medal of Arts in 2008.
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- "Stan Lee has died" | 2018-11-12 | 60 Upvotes 9 Comments
๐ Myth of Meritocracy
Myth of meritocracy is a phrase arguing that meritocracy, or achieving upward social mobility through one's own merits regardless of one's social position, is not widely attainable in capitalist societies because of inherent contradictions. Meritocracy is argued to be a myth because, despite being promoted as an open and accessible method of achieving upward class mobility under neoliberal or free market capitalism, wealth disparity and limited class mobility remain widespread, regardless of individual work ethic. Some scholars argue that the wealth disparity has even increased because the "myth" of meritocracy has been so effectively promoted and defended by the political and private elite through the media, education, corporate culture, and elsewhere. Economist Robert Reich argues that many Americans still believe in meritocracy despite "the nation drifting ever-farther away from it."
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- "Myth of Meritocracy" | 2025-01-05 | 12 Upvotes 5 Comments
๐ Hilbert's 24th problem
Hilbert's twenty-fourth problem is a mathematical problem that was not published as part of the list of 23 problems known as Hilbert's problems but was included in David Hilbert's original notes. The problem asks for a criterion of simplicity in mathematical proofs and the development of a proof theory with the power to prove that a given proof is the simplest possible.
The 24th problem was rediscovered by German historian Rรผdiger Thiele in 2000, noting that Hilbert did not include the 24th problem in the lecture presenting Hilbert's problems or any published texts. Hilbert's friends and fellow mathematicians Adolf Hurwitz and Hermann Minkowski were closely involved in the project but did not have any knowledge of this problem.
This is the full text from Hilbert's notes given in Rรผdiger Thiele's paper. The section was translated by Rรผdiger Thiele.
The 24th problem in my Paris lecture was to be: Criteria of simplicity, or proof of the greatest simplicity of certain proofs. Develop a theory of the method of proof in mathematics in general. Under a given set of conditions there can be but one simplest proof. Quite generally, if there are two proofs for a theorem, you must keep going until you have derived each from the other, or until it becomes quite evident what variant conditions (and aids) have been used in the two proofs. Given two routes, it is not right to take either of these two or to look for a third; it is necessary to investigate the area lying between the two routes. Attempts at judging the simplicity of a proof are in my examination of syzygies and syzygies [Hilbert misspelled the word syzygies] between syzygies (see Hilbert 42, lectures XXXIIโXXXIX). The use or the knowledge of a syzygy simplifies in an essential way a proof that a certain identity is true. Because any process of addition [is] an application of the commutative law of addition etc. [and because] this always corresponds to geometric theorems or logical conclusions, one can count these [processes], and, for instance, in proving certain theorems of elementary geometry (the Pythagoras theorem, [theorems] on remarkable points of triangles), one can very well decide which of the proofs is the simplest. [Author's note: Part of the last sentence is not only barely legible in Hilbert's notebook but also grammatically incorrect. Corrections and insertions that Hilbert made in this entry show that he wrote down the problem in haste.]
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- "Hilbert's 24th problem" | 2014-08-19 | 29 Upvotes 15 Comments