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🔗 Philosophy 🔗 Philosophy/Social and political philosophy

The paradox of tolerance states that if a society is tolerant without limit, its ability to be tolerant is eventually seized or destroyed by the intolerant. Karl Popper described it as the seemingly paradoxical idea that, "In order to maintain a tolerant society, the society must be intolerant of intolerance." The paradox of tolerance is an important concept for thinking about which boundaries can or should be set.

🔗 Mathematics

In mathematics, Euler's identity (also known as Euler's equation) is the equality

${\displaystyle e^{i\pi }+1=0}$

where

e is Euler's number, the base of natural logarithms,

i is the imaginary unit, which by definition satisfies i² = −1, and

π is pi, the ratio of the circumference of a circle to its diameter.

Euler's identity is named after the Swiss mathematician Leonhard Euler. It is considered to be an exemplar of mathematical beauty as it shows a profound connection between the most fundamental numbers in mathematics.

🔗 Philosophy 🔗 Skepticism 🔗 Alternative Views 🔗 ArtAndFeminism

'Pataphysics (French: 'pataphysique) is a "philosophy" of science invented by French writer Alfred Jarry (1873–1907) intended to be a parody of science. Difficult to be simply defined or pinned down, it has been described as the "science of imaginary solutions".

🔗 United States 🔗 Biography 🔗 Military history 🔗 Military history/North American military history 🔗 Military history/United States military history 🔗 Science Fiction 🔗 Biography/science and academia 🔗 Military history/Military biography 🔗 Biography/military biography 🔗 Biography/arts and entertainment 🔗 Chicago 🔗 United States/Massachusetts - Cape Cod and the Islands 🔗 United States/Indiana - Indianapolis

Kurt Vonnegut Jr. (; November 11, 1922 – April 11, 2007) was an American writer. In a career spanning over 50 years, Vonnegut published fourteen novels, three short story collections, five plays, and five works of non-fiction, with further collections being published after his death. He is most famous for his darkly satirical, best-selling novel Slaughterhouse-Five (1969).

Born and raised in Indianapolis, Indiana, Vonnegut attended Cornell University but dropped out in January 1943 and enlisted in the United States Army. As part of his training, he studied mechanical engineering at Carnegie Institute of Technology (now Carnegie Mellon University) and the University of Tennessee. He was then deployed to Europe to fight in World War II and was captured by the Germans during the Battle of the Bulge. He was interned in Dresden and survived the Allied bombing of the city by taking refuge in a meat locker of the slaughterhouse where he was imprisoned. After the war, Vonnegut married Jane Marie Cox, with whom he had three children. He later adopted his sister's three sons, after she died of cancer and her husband was killed in a train accident.

Vonnegut published his first novel, Player Piano, in 1952. The novel was reviewed positively but was not commercially successful. In the nearly 20 years that followed, Vonnegut published several novels that were only marginally successful, such as Cat's Cradle (1963) and God Bless You, Mr. Rosewater (1964). Vonnegut's breakthrough was his commercially and critically successful sixth novel, Slaughterhouse-Five. The book's anti-war sentiment resonated with its readers amidst the ongoing Vietnam War and its reviews were generally positive. After its release, Slaughterhouse-Five went to the top of The New York Times Best Seller list, thrusting Vonnegut into fame. He was invited to give speeches, lectures and commencement addresses around the country and received many awards and honors.

Later in his career, Vonnegut published several autobiographical essays and short-story collections, including Fates Worse Than Death (1991), and A Man Without a Country (2005). After his death, he was hailed as a morbidly comical commentator on the society in which he lived and as one of the most important contemporary writers. Vonnegut's son Mark published a compilation of his father's unpublished compositions, titled Armageddon in Retrospect. In 2017, Seven Stories Press published Complete Stories, a collection of Vonnegut's short fiction including five previously unpublished stories. Complete Stories was collected and introduced by Vonnegut friends and scholars Jerome Klinkowitz and Dan Wakefield. Numerous scholarly works have examined Vonnegut's writing and humor.

🔗 Telecommunications

The Better Approach to Mobile Ad-hoc Networking (B.A.T.M.A.N.) is a routing protocol for multi-hop mobile ad hoc networks which is under development by the German "Freifunk" community and intended to replace the Optimized Link State Routing Protocol (OLSR).

B.A.T.M.A.N.'s crucial point is the decentralization of knowledge about the best route through the network — no single node has all the data. This technique eliminates the need to spread information about network changes to every node in the network. The individual node only saves information about the "direction" it received data from and sends its data accordingly. The data gets passed from node to node, and packets get individual, dynamically created routes. A network of collective intelligence is created.

In early 2007, the B.A.T.M.A.N. developers started experimenting with the idea of routing on layer 2 (Ethernet layer) instead of layer 3. To differentiate from the layer 3 routing daemon, the suffix "adv" (for: advanced) was chosen. Instead of manipulating routing tables based on information exchanged via UDP/IP, it provides a virtual network interface and transparently transports Ethernet packets on its own. The batman-adv kernel module has been part of the official Linux kernel since 2.6.38.

🔗 Animation 🔗 Disney 🔗 Project-independent assessment

Disney's twelve basic principles of animation were introduced by the Disney animators Ollie Johnston and Frank Thomas in their 1981 book The Illusion of Life: Disney Animation.^[a] The principles are based on the work of Disney animators from the 1930s onwards, in their quest to produce more realistic animation. The main purpose of these principles was to produce an illusion that cartoon characters adhered to the basic laws of physics, but they also dealt with more abstract issues, such as emotional timing and character appeal.

The book has been referred to by some as the "Bible of animation", and some of its principles have been adopted by traditional studios. In 1999, The Illusion of Life was voted the "best animation book[...] of all time" in an online poll done by Animation World Network. While originally intended to apply to traditional, hand-drawn animation, the principles still have great relevance for today's more prevalent computer animation.

🔗 Environment 🔗 Disaster management 🔗 Mexico 🔗 Occupational Safety and Health 🔗 Energy 🔗 Caribbean 🔗 Fisheries and Fishing

Ixtoc I was an exploratory oil well being drilled by the semi-submersible drilling rig Sedco 135 in the Bay of Campeche of the Gulf of Mexico, about 100 km (62 mi) northwest of Ciudad del Carmen, Campeche in waters 50 m (160 ft) deep. On 3 June 1979, the well suffered a blowout resulting in one of the largest oil spills in history.

🔗 Statistics 🔗 Futures studies

The Delphi method or Delphi technique ( DEL-fy; also known as Estimate-Talk-Estimate or ETE) is a structured communication technique or method, originally developed as a systematic, interactive forecasting method which relies on a panel of experts. The technique can also be adapted for use in face-to-face meetings, and is then called mini-Delphi or Estimate-Talk-Estimate (ETE). Delphi has been widely used for business forecasting and has certain advantages over another structured forecasting approach, prediction markets.

Delphi is based on the principle that forecasts (or decisions) from a structured group of individuals are more accurate than those from unstructured groups. The experts answer questionnaires in two or more rounds. After each round, a facilitator or change agent provides an anonymised summary of the experts' forecasts from the previous round as well as the reasons they provided for their judgments. Thus, experts are encouraged to revise their earlier answers in light of the replies of other members of their panel. It is believed that during this process the range of the answers will decrease and the group will converge towards the "correct" answer. Finally, the process is stopped after a predefined stop criterion (e.g., number of rounds, achievement of consensus, stability of results), and the mean or median scores of the final rounds determine the results.

Special attention has to be paid to the formulation of the Delphi theses and the definition and selection of the experts in order to avoid methodological weaknesses that severely threaten the validity and reliability of the results.

🔗 Astronomy 🔗 Geology 🔗 Geology/Meteorites 🔗 Solar System

The Perseids are a prolific meteor shower associated with the comet Swift–Tuttle. The meteors are called the Perseids because the point from which they appear to hail (called the radiant) lies in the constellation Perseus.