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π Pangram
A pangram or holoalphabetic sentence is a sentence using every letter of a given alphabet at least once. Pangrams have been used to display typefaces, test equipment, and develop skills in handwriting, calligraphy, and keyboarding.
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- "Pangram" | 2023-02-11 | 148 Upvotes 64 Comments
π Vacuum airship
A vacuum airship, also known as a vacuum balloon, is a hypothetical airship that is evacuated rather than filled with a lighter-than-air gas such as hydrogen or helium. First proposed by Italian Jesuit priest Francesco Lana de Terzi in 1670, the vacuum balloon would be the ultimate expression of lifting power per volume displaced.
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- "Vacuum Airship" | 2023-07-20 | 101 Upvotes 73 Comments
- "Vacuum airship" | 2014-08-12 | 56 Upvotes 59 Comments
π Kakure Kirishitan
Kakure kirishitan (Japanese: ι γγγͺγ·γΏγ³, lit.β'hidden Christians') is a modern term for a member of the Catholic Church in Japan that went underground at the start of the Edo period in the early 17th century due to Christianity's repression by the Tokugawa shogunate.
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- "Kakure Kirishitan" | 2023-07-15 | 32 Upvotes 5 Comments
π Cancer Alley
Cancer Alley (French: AllΓ©e du Cancer) is the regional nickname given to an 85-mile (137Β km) stretch of land along the Mississippi River between Baton Rouge and New Orleans, in the River Parishes of Louisiana, which contains over 200 petrochemical plants and refineries. This area accounts for 25% of the petrochemical production in the United States. Environmentalists consider the region a sacrifice zone where rates of cancer caused by air pollution exceed the federal government's own limits of acceptable risk. Others have referred to the same region as "Death Alley".
Community leaders such as Sharon Lavigne have led the charge in protesting the expansion of the petrochemical industry in Cancer Alley, as well as addressing the associated racial and economic disparities.
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- "Cancer Alley" | 2024-01-17 | 181 Upvotes 87 Comments
π Deseret Alphabet
The Deseret alphabet ( (listen); Deseret: ππ―π π¨ππ―π» or ππ―ππ²ππ―π») is a phonemic English-language spelling reform developed between 1847 and 1854 by the board of regents of the University of Deseret under the leadership of Brigham Young, the second president of the Church of Jesus Christ of Latter-day Saints (LDS Church). George D. Watt is reported to have been the most actively involved in the development of the script,:β159β as well as being its first serious user.:β12β
The Deseret alphabet was an outgrowth of the idealism and utopianism of Young and the early LDS Church. Young and the Mormon pioneers believed "all aspects of life" were in need of reform for the imminent millenniumand the Deseret alphabet was just one of many ways they sought to bring about a complete "transformation in society",:β142β in anticipation of the Second Coming of Jesus. Young wrote of the reform that "it would represent every sound used in the construction of any known language; and, in fact, a step and partial return to a pure language which has been promised unto us in the latter days," the Adamic language spoken before the Tower of Babel.
In public statements, Young claimed the alphabet would replace the traditional Latin alphabet with an alternative, more phonetically accurate alphabet for the English language. This would offer immigrants an opportunity to learn to read and write English, he said, the orthography of which is often less phonetically consistent than those of many other languages.:β65β66β Similar neographies have been attempted, the most well-known of which for English is the Shavian alphabet.
Young also prescribed the learning of Deseret to the school system, stating "It will be the means of introducing uniformity in our orthography, and the years that are now required to learn to read and spell can be devoted to other studies."
During the alphabet's heyday between 1854 and 1869, scriptural passages in newspapers, selected church records, a $5 gold coin, and occasional street signs and correspondence used the new letters. In 1868-9, after much difficulty creating suitable fonts, four books were printed: two school primers, the full Book of Mormon, and a portion of it titled the Book of Nephi.
Despite heavy and costly promotion by the early LDS Church, the alphabet never enjoyed prolonged widespread use and has been regarded by historians as a failure. However, in recent years, aided by digital typography, the Deseret Alphabet has been revived as a cultural heirloom.
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- "Deseret Alphabet" | 2023-05-01 | 140 Upvotes 71 Comments
π The fastest pulsar spins at 716Hz; its equator spins at 24% the speed of light
PSR J1748β2446ad is the fastest-spinning pulsar known, at 716 Hz, or 716 times per second. This pulsar was discovered by Jason W. T. Hessels of McGill University on November 10, 2004 and confirmed on January 8, 2005.
If the neutron star is assumed to contain less than two times the mass of the Sun, within the typical range of neutron stars, its radius is constrained to be less than 16Β km. At its equator it is spinning at approximately 24% of the speed of light, or over 70,000Β km per second.
The pulsar is located in a globular cluster of stars called Terzan 5, located approximately 18,000 light-years from Earth in the constellation Sagittarius. It is part of a binary system and undergoes regular eclipses with an eclipse magnitude of about 40%. Its orbit is highly circular with a 26-hour period. The other object is at least 0.14 solar masses, with a radius of 5β6 solar radii. Hessels et al. state that the companion may be a "bloated main-sequence star, possibly still filling its Roche Lobe". Hessels et al. go on to speculate that gravitational radiation from the pulsar might be detectable by LIGO.
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- "The fastest pulsar spins at 716Hz; its equator spins at 24% the speed of light" | 2014-02-17 | 122 Upvotes 78 Comments
π British Airways Flight 5390
British Airways Flight 5390 was a flight from Birmingham Airport in England for MΓ‘laga Airport in Spain that suffered explosive decompression, with no loss of life, shortly after takeoff on 10 June 1990. An improperly installed windscreen panel separated from its frame, causing the plane's captain to be blown partially out of the aircraft. With the captain pinned against the window frame for twenty minutes, the first officer landed at Southampton Airport.
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- "British Airways Flight 5390" | 2020-11-14 | 169 Upvotes 101 Comments
π Distributism
Distributism is an economic theory asserting that the world's productive assets should be widely owned rather than concentrated.
Developed in Europe in the late 19th and early 20th centuries, distributism was based upon the principles of Catholic social teaching, especially the teachings of Pope Leo XIII in his encyclical Rerum novarum (1891) and Pope Pius XI in Quadragesimo anno (1931). It views both capitalism and socialism as equally flawed and exploitative, and it favors economic mechanisms such as cooperatives and member-owned mutual organizations as well as small businesses, and large-scale antitrust regulations.
Some Christian democratic political parties have advocated distributism in their economic policies.
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- "Distributism" | 2019-04-01 | 209 Upvotes 113 Comments
π Water Based Analog Computer
The Water Integrator (Russian: ΠΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΎΡ) was an early analog computer built in the Soviet Union in 1936 by Vladimir Sergeevich Lukyanov. It functioned by careful manipulation of water through a room full of interconnected pipes and pumps. The water level in various chambers (with precision to fractions of a millimeter) represented stored numbers, and the rate of flow between them represented mathematical operations. This machine was capable of solving inhomogeneous differential equations.
The first versions of Lukyanov's integrators were rather experimental, made of tin and glass tubes, and each integrator could be used to solve only one problem. In the 1930s it was the only computer in the Soviet Union for solving partial differential equations.
In 1941, Lukyanov created a hydraulic integrator of modular design, which made it possible to assemble a machine for solving various problems. Two-dimensional and three-dimensional hydraulic integrators were designed.
In 1949β1955, an integrator in the form of standard unified units was developed at the NIISCHETMASH Institute. In 1955, the Ryazan plant of calculating and analytical machines began the serial production of integrators with the factory brand name βIGLβ (russian: ΠΠ½ΡΠ΅Π³ΡΠ°ΡΠΎΡ ΠΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΡΠΊΡΡΠ½ΠΎΠ²Π° - integrator of the Lukyanov hydraulic system). Integrators were widely distributed, delivered to Czechoslovakia, Poland, Bulgaria and China.
A water integrator was used in the design of the Karakum Canal in the 1940s, and the construction of the BaikalβAmur Mainline in the 1970s. Water analog computers were used in the Soviet Union until the 1980s for large-scale modelling. They were used in geology, mine construction, metallurgy, rocket production and other fields.
Currently, two hydraulic integrators are kept in the Polytechnic Museum in Moscow.
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- "Water Based Analog Computer" | 2020-11-23 | 22 Upvotes 1 Comments
π The repetitive and boring gameplay in WoW is probably intentional.
In video games, grinding is performing repetitive tasks, usually for a gameplay advantage or loot but in some cases for purely aesthetic or cosmetic benefits. Many video games use different tactics to implement, or reduce, the amount of grinding in the gameplay. The general use of grinding is for "experience points", or to improve a character's level. In addition, the behavior is sometimes referred to as pushing the bar (leveling up), farming (acquiring loot repeatedly from one source), or catassing.
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- "The repetitive and boring gameplay in WoW is probably intentional." | 2010-01-16 | 34 Upvotes 37 Comments