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🔗 Computing 🔗 Books

The UNIX-HATERS Handbook is a semi-humorous edited compilation of messages to the UNIX-HATERS mailing list. The book was edited by Simson Garfinkel, Daniel Weise and Steven Strassmann and published in 1994.

🔗 Biography 🔗 Military history 🔗 Architecture 🔗 Greece 🔗 Military history/Military biography 🔗 Biography/military biography 🔗 Military history/World War II 🔗 Military history/Cold War 🔗 Dance 🔗 Composers 🔗 Dance/Ballet 🔗 Classical music 🔗 Military history/Balkan military history 🔗 Biography/Musicians 🔗 Military history/European military history

Iannis Xenakis (also spelt as Yannis Xenakis) (Greek: Γιάννης (Ιάννης) Ξενάκης [ˈʝanis kseˈnacis]; 29 May 1922 – 4 February 2001) was a Greek-French composer, music theorist, architect, performance director and engineer. After 1947, he fled Greece, becoming a naturalized citizen of France. He is considered an important post-World War II composer whose works helped revolutionize 20th-century classical music.

Xenakis pioneered the use of mathematical models in music such as applications of set theory, stochastic processes and game theory and was also an important influence on the development of electronic and computer music. He integrated music with architecture, designing music for pre-existing spaces, and designing spaces to be integrated with specific music compositions and performances.

Among his most important works are Metastaseis (1953–54) for orchestra, which introduced independent parts for every musician of the orchestra; percussion works such as Psappha (1975) and Pléïades (1979); compositions that introduced spatialization by dispersing musicians among the audience, such as Terretektorh (1966); electronic works created using Xenakis's UPIC system; and the massive multimedia performances Xenakis called polytopes, that were a summa of his interests and skills. Among the numerous theoretical writings he authored, the book Formalized Music: Thought and Mathematics in Composition (French edition 1963, English translation 1971) is regarded as one of his most important. As an architect, Xenakis is primarily known for his early work under Le Corbusier: the Sainte Marie de La Tourette, on which the two architects collaborated, and the Philips Pavilion at Expo 58, which Xenakis designed by himself.

🔗 Computing 🔗 Mathematics

Wireworld is a cellular automaton first proposed by Brian Silverman in 1987, as part of his program Phantom Fish Tank. It subsequently became more widely known as a result of an article in the "Computer Recreations" column of Scientific American. Wireworld is particularly suited to simulating transistors, and Wireworld is Turing-complete.

🔗 Finance & Investment 🔗 New York City 🔗 Fraternities and Sororities

Kappa Beta Phi (ΚΒΦ) is a secret society with at least one surviving chapter, based on Wall Street in New York City, that is made up of high-ranking financial executives. The purpose of the organization today is largely social and honorific. The current honor society meets once a year at a black-tie dinner to induct new members.

🔗 Michigan 🔗 Road transport 🔗 U.S. Roads

A Michigan left is an at-grade intersection design that replaces each left turn at an intersection between a (major) divided roadway and a secondary (minor) roadway with the combination of a right turn followed by a U-turn, or a U-turn followed by a right turn, depending on the situation.

🔗 Electronics

The Smith chart, invented by Phillip H. Smith (1905–1987), and T. Mizuhashi, is a graphical calculator or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF) engineering to assist in solving problems with transmission lines and matching circuits. The Smith chart can be used to simultaneously display multiple parameters including impedances, admittances, reflection coefficients, ${\displaystyle S_{nn}\,}$ scattering parameters, noise figure circles, constant gain contours and regions for unconditional stability, including mechanical vibrations analysis. The Smith chart is most frequently used at or within the unity radius region. However, the remainder is still mathematically relevant, being used, for example, in oscillator design and stability analysis. While the use of paper Smith charts for solving the complex mathematics involved in matching problems has been largely replaced by software based methods, the Smith charts display is still the preferred method of displaying how RF parameters behave at one or more frequencies, an alternative to using tabular information. Thus most RF circuit analysis software includes a Smith chart option for the display of results and all but the simplest impedance measuring instruments can display measured results on a Smith chart display.

🔗 Finance & Investment 🔗 Economics 🔗 Food and drink 🔗 Food and drink/Foodservice 🔗 Retailing 🔗 Globalization

The Big Mac Index is a price index published by The Economist as an informal way of measuring the purchasing power parity (PPP) between two currencies and provides a test of the extent to which market exchange rates result in goods costing the same in different countries. It "seeks to make exchange-rate theory a bit more digestible."

The index, created in 1986, takes its name from the Big Mac, a hamburger sold at McDonald's restaurants.

🔗 California 🔗 Organizations 🔗 Scientology 🔗 California/Inland Empire

The Sea Organization (also known as the Sea Org) is a Scientology organization, which the Church of Scientology describes as a "fraternal religious order, comprising the church's most dedicated members". All Scientology management organizations are controlled exclusively by members of the Sea Org. David Miscavige, the de facto leader of Scientology, is the highest-ranking Sea Org officer, holding the rank of captain.

The Sea Org has been described as a paramilitary organization and as a private naval force, having operated several vessels in its past and displaying a maritime tradition. Some ex-members and scholars have described the Sea Org as a totalitarian organization marked by intensive surveillance and a lack of freedom. The Sea Org has also been compared to a monastic organization.

In a 1992 memorandum by the Church of Scientology International, the following information was provided to the Internal Revenue Service with regards to nature of the Sea Org:

[the Sea Org] does not have an ecclesiastical organizing board or command channels chart or secular existence such as an incorporated or unincorporated association. ... Although there is no such "organization" as the Sea Organization, the term Sea Org has a colloquial usage which implies that there is. There are general recruitment posters and literature for "The Sea Org" which implies that people will be employed by the Sea Org when in reality they will join, making the billion year commitment, at some church that is staffed by Sea Org members and become employees of that church corporation. ... The Sea Org exists as a spiritual commitment that is factually beyond the full understanding of the Service or any other but a trained and audited Scientologist.

The Sea Org was established on August 12, 1967, by L. Ron Hubbard, the founder of Dianetics and Scientology, initially on board three ships, the Diana, the Athena, and the Apollo, with the latter serving as flagship.

In 1971, the Sea Org assumed responsibility for the church's ecclesiastical development, and in particular the delivery of the upper levels of its auditing and training, known as the Operating Thetan or "OT" levels. In 1981, under the aegis of the Commodore's Messenger Organization led by David Miscavige, the Sea Org dissolved the Guardian's Office (GO) and assumed full responsibility for the church's international management, later reassigning the GO's duties to the Office of Special Affairs in 1983 during the corporate restructuring of the Church.

It moved to land-based organizations in 1975, though maritime customs persist, with many members wearing naval-style uniforms and addressing both male and female officers as "sir." In 1985, the church purchased a 440-foot (130 m) motor vessel, the Freewinds, which docks in Curaçao in the southern Caribbean and is used as a religious retreat and training center, staffed entirely by Sea Org members. Sea Org members make a lifetime commitment to Scientology by signing a billion-year contract officially described as a symbolic pledge. In exchange, members are given free room and board, as well as a small weekly allowance. Sea Org members agree to strict codes of discipline, such as disavowing premarital sex, working long hours (on average at least 100 hours per week) and living in communal housing called "berthings." They are allowed to marry, but must relinquish their membership if they have or want to raise children.

🔗 Mathematics 🔗 Physics

The Fresnel integrals S(x) and C(x) are two transcendental functions named after Augustin-Jean Fresnel that are used in optics and are closely related to the error function (erf). They arise in the description of near-field Fresnel diffraction phenomena and are defined through the following integral representations:

The simultaneous parametric plot of S(x) and C(x) is the Euler spiral (also known as the Cornu spiral or clothoid).