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๐ The Butlerian Jihad
Dune: The Butlerian Jihad is a 2002 science fiction novel by Brian Herbert and Kevin J. Anderson, set in the fictional Dune universe created by Frank Herbert. It is the first book in the Legends of Dune prequel trilogy, which takes place over 10,000 years before the events of Frank Herbert's celebrated 1965 novel Dune. The series chronicles the fictional Butlerian Jihad, a crusade by the last free humans in the universe against the thinking machines, a violent and dominating force led by the sentient computer Omnius.
Dune: The Butlerian Jihad rose to #7 on The New York Times Best Seller list in its second week of publication.
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- "The Butlerian Jihad" | 2023-03-15 | 75 Upvotes 94 Comments
๐ List of Java virtual machines
This article provides non-exhaustive lists of Java SE Java virtual machines (JVMs). It does not include a large number of Java ME vendors. Note that Java EE runs on the standard Java SE JVM but that some vendors specialize in providing a modified JVM optimized for Java EE applications. A large amount of Java development work takes place on Windows, Solaris, Linux and FreeBSD, primarily with the Oracle JVMs. Note the further complication of different 32-bit/64-bit varieties.
The primary reference Java VM implementation is HotSpot, produced by Oracle Corporation.
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- "List of Java virtual machines" | 2014-08-07 | 25 Upvotes 7 Comments
๐ Bioluminescence
Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies. In some animals, the light is bacteriogenic, produced by symbiotic bacteria such as those from the genus Vibrio; in others, it is autogenic, produced by the animals themselves.
In a general sense, the principal chemical reaction in bioluminescence involves a light-emitting molecule and an enzyme, generally called luciferin and luciferase, respectively. Because these are generic names, luciferins and luciferases are often distinguished by the species or group, e.g. firefly luciferin. In all characterized cases, the enzyme catalyzes the oxidation of the luciferin.
In some species, the luciferase requires other cofactors, such as calcium or magnesium ions, and sometimes also the energy-carrying molecule adenosine triphosphate (ATP). In evolution, luciferins vary little: one in particular, coelenterazine, is found in 11 different animal phyla, though in some of these, the animals obtain it through their diet. Conversely, luciferases vary widely between different species, which is evidence that bioluminescence has arisen over 40 times in evolutionary history.
Both Aristotle and Pliny the Elder mentioned that damp wood sometimes gives off a glow. Many centuries later Robert Boyle showed that oxygen was involved in the process, in both wood and glowworms. It was not until the late nineteenth century that bioluminescence was properly investigated. The phenomenon is widely distributed among animal groups, especially in marine environments. On land it occurs in fungi, bacteria and some groups of invertebrates, including insects.
The uses of bioluminescence by animals include counterillumination camouflage, mimicry of other animals, for example to lure prey, and signaling to other individuals of the same species, such as to attract mates. In the laboratory, luciferase-based systems are used in genetic engineering and biomedical research. Researchers are also investigating the possibility of using bioluminescent systems for street and decorative lighting, and a bioluminescent plant has been created.
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- "Bioluminescence" | 2022-06-12 | 13 Upvotes 8 Comments
๐ ResistorโTransistor Logic (RTL)
Resistorโtransistor logic (RTL) (sometimes also transistorโresistor logic (TRL)) is a class of digital circuits built using resistors as the input network and bipolar junction transistors (BJTs) as switching devices. RTL is the earliest class of transistorized digital logic circuit; it was succeeded by diodeโtransistor logic (DTL) and transistorโtransistor logic (TTL).
RTL circuits were first constructed with discrete components, but in 1961 it became the first digital logic family to be produced as a monolithic integrated circuit. RTL integrated circuits were used in the Apollo Guidance Computer, whose design begun in 1961 and which first flew in 1966.
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- "ResistorโTransistor Logic (RTL)" | 2023-08-23 | 84 Upvotes 34 Comments
๐ Telautograph
The telautograph, an analog precursor to the modern fax machine, transmits electrical impulses recorded by potentiometers at the sending station to servomechanisms attached to a pen at the receiving station, thus reproducing at the receiving station a drawing or signature made by the sender. It was the first such device to transmit drawings to a stationary sheet of paper; previous inventions in Europe had used rotating drums to make such transmissions.
The telautograph's invention is attributed to Elisha Gray, who patented it on Julyย 31, 1888. Gray's patent stated that the telautograph would allow "one to transmit his own handwriting to a distant point over a two-wire circuit." It was the first facsimile machine in which the stylus was controlled by horizontal and vertical bars. The telautograph was first publicly exhibited at the 1893 World's Columbian Exposition held in Chicago.
While the patent schema's geometry implies vertical and horizontal coordinates, systems used in the 20th Century (and presumably before) had a different coordinate scheme, based on transmitting two angles.
In an 1888 interview in The Manufacturer & Builder (Vol. 24: No. 4: pages 85โ86) Gray made this statement:
By my invention you can sit down in your office in Chicago, take a pencil in your hand, write a message to me, and as your pencil moves, a pencil here in my laboratory moves simultaneously, and forms the same letters and words in the same way. What you write in Chicago is instantly reproduced here in fac-simile. You may write in any language, use a code or cipher, no matter, a fac-simile is produced here. If you want to draw a picture it is the same, the picture is reproduced here. The artist of your newspaper can, by this device, telegraph his pictures of a railway wreck or other occurrences just as a reporter telegraphs his description in words.
By the end of the 19th century, the telautograph was modified by Foster Ritchie. Calling it the telewriter, Ritchie's version of the telautograph could be operated using a telephone line for simultaneous copying and speaking.
The telautograph became very popular for the transmission of signatures over a distance, and in banks and large hospitals to ensure that doctors' orders and patient information were transmitted quickly and accurately. Teleautograph systems were installed in a number of major railroad stations to relay hand-written reports of train movements from the interlocking tower to various parts of the station. The teleautograph network in Grand Central Terminal included a public display in the main concourse into the 1960s; a similar setup in Chicago Union Station remained in operation into the 1970s.
A Telautograph was used in 1911 to warn workers on the 10th floor about the Triangle Shirtwaist Factory fire that had broken out two floors below. An example of a Telautograph machine writing script can be seen in the 1956 movie Earth vs the Flying Saucers as the output device for the mechanical translator.
Telautograph Corporation changed its name several times. In 1971, it was acquired by Arden/Mayfair. In 1993, Danka Industries purchased the company and renamed it Danka/Omnifax. In 1999, Xerox corporation purchased the company and called it the Omnifax division, which has since been absorbed by the corporation.
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- "Telautograph" | 2021-06-12 | 33 Upvotes 14 Comments
- "Telautograph" | 2019-07-06 | 68 Upvotes 10 Comments
๐ Turboencabulator
The turboencabulator or turbo-encabulator (and its later incarnations, the retroencabulator or retro-encabulator and Micro Encabulator) is a fictional machine whose alleged existence became an in-joke and subject of professional humor among engineers. The explanation of the supposed product makes extensive use of technobabble.
The gag was popular for many years. The following quote is from the original Students' Quarterly Journal article written by J. H. Quick in 1944. The citation in the later Time article misspells several of the technical terms. General Electric, Chrysler and Rockwell Automation use many of the same words.
The original machine had a base plate of prefabulated amulite, surmounted by a malleable logarithmic casing in such a way that the two main spurving bearings were in a direct line with the panametric fan. The latter consisted simply of six hydrocoptic marzlevanes, so fitted to the ambifacient lunar waneshaft that side fumbling was effectively prevented. The main winding was of the normal lotus-o-deltoid type placed in panendermic semi-boloid slots in the stator, every seventh conductor being connected by a nonreversible tremmie pipe to the differential girdlespring on the "up" end of the grammeters.
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- "Turboencabulator" | 2022-01-01 | 121 Upvotes 52 Comments
- "Turboencabulator" | 2013-11-30 | 25 Upvotes 11 Comments
๐ 1984
Nineteen Eighty-Four: A Novel, often published as 1984, is a dystopian novel by English novelist George Orwell. It was published in June 1949 by Secker & Warburg as Orwell's ninth and final book completed in his lifetime. The story was mostly written at Barnhill, a farmhouse on the Scottish island of Jura, at times while Orwell suffered from severe tuberculosis. Thematically, Nineteen Eighty-Four centres on the consequences of government over-reach, totalitarianism, mass surveillance, and repressive regimentation of all persons and behaviours within society.
The story takes place in an imagined future, the year 1984, when much of the world has fallen victim to perpetual war, omnipresent government surveillance, historical negationism, and propaganda. Great Britain, known as Airstrip One, has become a province of a superstate named Oceania that is ruled by the Party who employ the Thought Police to persecute individuality and independent thinking. Big Brother, the leader of the Party, enjoys an intense cult of personality despite the fact that he may not exist. The protagonist, Winston Smith, is a diligent and skillful rank-and-file worker and Party member who secretly hates the Party and dreams of rebellion. He enters a forbidden relationship with a co-worker, Julia.
Nineteen Eighty-Four has become a classic literary example of political and dystopian fiction. Many terms used in the novel have entered common usage, including Big Brother, doublethink, thoughtcrime, Newspeak, Room 101, telescreen, 2 + 2 = 5, prole, and memory hole. Nineteen Eighty-Four also popularised the adjective "Orwellian", connoting things such as official deception, secret surveillance, brazenly misleading terminology, and manipulation of recorded history by a totalitarian or authoritarian state. Time included it on its 100 best English-language novels from 1923 to 2005. It was placed on the Modern Library's 100 Best Novels, reaching No. 13 on the editors' list and No. 6 on the readers' list. In 2003, the novel was listed at No. 8 on The Big Read survey by the BBC. Parallels have been drawn between the novel's subject matter and real life instances of totalitarianism, mass surveillance, and violations of freedom of expression among other themes.
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- "1984" | 2013-06-09 | 10 Upvotes 2 Comments
๐ 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
๐ McLibel Case
McDonald's Corporation v Steel & Morris [1997] EWHC QB 366, known as "the McLibel case", was an English lawsuit for libel filed by McDonald's Corporation against environmental activists Helen Steel and David Morris (often referred to as "The McLibel Two") over a factsheet critical of the company. Each of two hearings in English courts found some of the leaflet's contested claims to be libellous and others to be true.
The original case lasted nearly ten years which, according to the BBC, made it the longest-running libel case in English history. McDonald's announced it did not plan to collect the ยฃ40,000 it was awarded by the courts. Following the decision, the European Court of Human Rights (ECHR) ruled in Steel & Morris v United Kingdom the pair had been denied a fair trial, in breach of Article 6 of the European Convention on Human Rights (right to a fair trial) and their conduct should have been protected by Article 10 of the Convention, which protects the right to freedom of expression. The court awarded a judgement of ยฃ57,000 against the UK government. McDonald's itself was not involved in, or a party to, this action, as applications to the ECHR are independent cases filed against the relevant state.
Franny Armstrong and Ken Loach made a documentary film, McLibel, about the case.
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- "McLibel Case" | 2020-05-21 | 69 Upvotes 26 Comments
๐ Gallery of animations that explain math ideas
Below is a mostly comprehensive gallery of all images โ illustrations, diagrams and animations โ that I have created for Wikipedia over the years, some of which have been selected as featured pictures, or even picture of the day. As you'll probably notice, they're mostly related to physics and mathematics, which are my main areas of interest.
If you have any comments, requests, suggestions or corrections, feel free to drop me a message on my talk page. But please, before making a suggestion, first take a look and see what sort of stuff I can do. Due to time, knowledge and complexity constraints, I cannot guarantee I'll be able to make a good illustration of any topic.
You can also follow me on tumblr for WIPs, current and failed projects and other creations.
If you appreciate my work, consider making a donation.
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- "Gallery of animations that explain math ideas" | 2015-01-04 | 79 Upvotes 1 Comments