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🔗 Physics

An exotic atom is an otherwise normal atom in which one or more sub-atomic particles have been replaced by other particles of the same charge. For example, electrons may be replaced by other negatively charged particles such as muons (muonic atoms) or pions (pionic atoms). Because these substitute particles are usually unstable, exotic atoms typically have very short lifetimes and all currently observed atoms cannot persist under normal conditions.

🔗 Mathematics

Pentagramma mirificum (Latin for miraculous pentagram) is a star polygon on a sphere, composed of five great circle arcs, all of whose internal angles are right angles. This shape was described by John Napier in his 1614 book Mirifici logarithmorum canonis descriptio (Description of the wonderful rule of logarithms) along with rules that link the values of trigonometric functions of five parts of a right spherical triangle (two angles and three sides). The properties of pentagramma mirificum were studied, among others, by Carl Friedrich Gauss.

🔗 Internet culture 🔗 Environment 🔗 Skepticism 🔗 Chemicals 🔗 Sociology

The dihydrogen monoxide parody involves calling water by an unfamiliar chemical name, most often "dihydrogen monoxide" (DHMO), and listing some of water's well-known effects in a particularly alarming manner, such as accelerating corrosion and causing suffocation. The parody often calls for dihydrogen monoxide to be banned, regulated, or labeled as dangerous. It demonstrates how a lack of scientific literacy and an exaggerated analysis can lead to misplaced fears.

The parody has been used with other chemical names, including "dihydrogen oxide", "hydroxyl acid", and "hydroxylic acid".

🔗 Germany 🔗 Measurement

The obsolete units of measurement of German-speaking countries consist of a variety of units, with varying local standard definitions. Some of these units are still used in everyday speech and even in stores and on street markets as shorthand for similar amounts in the metric system. For example, some customers ask for one pound (ein Pfund) of something when they want 500 grams.

The metric system became compulsory on 1 January 1872, in Germany and on 1 January 1876, in Austria.

Some obsolete German units have names similar to units that were traditionally used in other countries, and that are still used in the United Kingdom (imperial units) and the United States (United States customary units).

🔗 Economics 🔗 Books

Basic Economics is a non-fiction book by American economist Thomas Sowell published by Basic Books in 2000. The original subtitle was A Citizen's Guide to the Economy, but from the third edition in 2007 on it was subtitled A Common Sense Guide to the Economy.

Basic Economics is focused on how societies create prosperity or poverty for their peoples by the way they organize their economies.

🔗 Computing 🔗 Computing/Software 🔗 Linux

The x32 ABI is an application binary interface (ABI) and one of the interfaces of the Linux kernel. It allows programs to take advantage of the benefits of x86-64 instruction set (larger number of CPU registers, better floating-point performance, faster position-independent code, shared libraries, function parameters passed via registers, faster syscall instruction) while using 32-bit pointers and thus avoiding the overhead of 64-bit pointers.

🔗 Mathematics 🔗 Economics 🔗 Politics 🔗 Urban studies and planning 🔗 Organizations 🔗 Game theory

Braess' paradox is the observation that adding one or more roads to a road network can slow down overall traffic flow through it. The paradox was postulated in 1968 by German mathematician Dietrich Braess, who noticed that adding a road to a particular congested road traffic network would increase overall journey time.

The paradox may have analogies in electrical power grids and biological systems. It has been suggested that in theory, the improvement of a malfunctioning network could be accomplished by removing certain parts of it. The paradox has been used to explain instances of improved traffic flow when existing major roads are closed.

🔗 Film 🔗 Film/American cinema 🔗 Film/Documentary films 🔗 Film/British cinema

The Up series of documentary films follows the lives of ten males and four females in England beginning in 1964, when they were seven years old. The first film was titled Seven Up!, with later films adjusting the number in the title to match the age of the subjects at the time of filming. The documentary has had nine episodes—one every seven years—thus spanning 56 years. The series has been produced by Granada Television for ITV, which has broadcast all of them except 42 Up (1998), which was broadcast on BBC One. Individual films and the series as a whole have received numerous accolades; in 1991, the then-latest instalment, 28 Up, was chosen for Roger Ebert's list of the ten greatest films of all time.

The children were selected for the original programme to represent the range of socio-economic backgrounds in Britain at that time, with the expectation that each child's social class would determine their future. The first instalment was made as a one-off edition of Granada Television's series, World in Action, directed by Canadian Paul Almond, with involvement by "a fresh-faced young researcher, a middle-class Cambridge graduate", Michael Apted, whose role in the initial programme included "trawling the nation's schools for 14 suitable subjects". About the first programme, Apted has said:

It was Paul's film ... but he was more interested in making a beautiful film about being seven, whereas I wanted to make a nasty piece of work about these kids who have it all, and these other kids who have nothing.

After Almond's direction of the original programme, director Michael Apted continued the series with new instalments every seven years, filming material from those of the fourteen who chose to participate. The aim of the continuing series is stated at the beginning of 7 Up as: "Why did we bring these together? Because we wanted a glimpse of England in the year 2000. The union leader and the business executive of the year 2000 are now seven years old." The most recent instalment, the ninth, titled 63 Up, premiered in the UK on ITV in 2019. A special episode featuring celebrity fans of the series, 7 Up & Me, also aired on ITV in 2019. Apted is reported to have said, "I hope to do 84 Up when I'll be 99"; however, he died in 2021.

🔗 Physics 🔗 Energy 🔗 Physics/Fluid Dynamics

Salter's duck, also known as the nodding duck or by its official name the Edinburgh duck, is a device that converts wave power into electricity. The wave impact induces rotation of gyroscopes located inside a pear-shaped "duck", and an electrical generator converts this rotation into electricity with an overall efficiency of up to 90%. The Salter's duck was invented by Stephen Salter in response to the oil shortage in the 1970s and was one of the earliest generator designs proposed to the Wave Energy programme in the United Kingdom. The funding for the project was cut off in the early 1980s after oil prices rebounded and the UK government moved away from alternative energy sources. As of May 2018 no wave-power devices have ever gone into large-scale production.

🔗 Economics 🔗 Philosophy 🔗 Politics 🔗 Philosophy/Social and political philosophy 🔗 Philosophy/Philosophy of religion 🔗 Cooperatives 🔗 Catholicism

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.