New Articles (Page 79)

To stay up to date you can also follow on Mastodon.

πŸ”— Nothwithstanding Clause lets Canadian Provinces violate Constitutional rights

πŸ”— Human rights πŸ”— Canada πŸ”— Law πŸ”— Canada/Canadian law

Section 33 of the Canadian Charter of Rights and Freedoms is part of the Constitution of Canada. It is commonly known as the notwithstanding clause (French: clause dΓ©rogatoire or clause nonobstant), sometimes referred to as the override power, and it allows Parliament or provincial legislatures to temporarily override sections 2 and 7–15 of the Charter.

Discussed on

πŸ”— Williamson Amplifier

πŸ”— Electronics

The Williamson amplifier is a four-stage, push-pull, Class A triode-output valve audio power amplifier designed by D. T. N. Williamson during World War II. The original circuit, published in 1947 and addressed to the worldwide do it yourself community, set the standard of high fidelity sound reproduction and served as a benchmark or reference amplifier design throughout the 1950s. The original circuit was copied by hundreds of thousands amateurs worldwide. It was an absolute favourite on the DIY scene of the 1950s, and in the beginning of the decade also dominated British and North American markets for factory-assembled amplifiers.

The Williamson circuit was based on the 1934 Wireless World Quality Amplifier by Walter Cocking, with an additional error amplifier stage and a global negative feedback loop. Deep feedback, triode-connected KT66 power tetrodes, conservative choice of standing currents, and the use of wide-bandwidth output transformer all contributed to the performance of the Williamson. It had a modest output power rating of 15Β Watts but surpassed all contemporary designs in having very low harmonic distortion and intermodulation, flat frequency response throughout the audible frequency range, and effective damping of loudspeaker resonances. The 0.1% distortion figure of the Williamson amplifier became the criterion for high fidelity performance that remains valid in the 21st century.

The Williamson amplifier was sensitive to selection and matching of passive components and valves, and prone to unwanted oscillations at infrasonic and ultrasonic frequencies. Enclosing four valve stages and an output transformer in a negative feedback loop was a severe test of design, resulting in a very narrow phase margin or, quite often, no margin at all. Attempts to improve stability of the Williamson could not fix this fundamental flaw. For this reason, and due to high costs of required quality components, manufacturers soon abandoned the Williamson circuit in favour of inherently more stable, cheaper and efficient three-stage, ultralinear or pentode-output designs.

πŸ”— Elizabeth Fleischman

πŸ”— Biography πŸ”— California πŸ”— California/San Francisco Bay Area πŸ”— Medicine πŸ”— Physics πŸ”— Women scientists πŸ”— Biography/science and academia πŸ”— Women's History πŸ”— Physics/Biographies πŸ”— Medicine/Radiology

Elizabeth Fleischman-Aschheim (nΓ©e Fleischman 5 March 1867 – 3 August 1905) was an American radiographer who is considered an X-ray pioneer. Fleischman was the first woman to die as a result of X-ray radiation exposure.

πŸ”— Venetian Arsenal

πŸ”— Military history πŸ”— Military history/Military science, technology, and theory πŸ”— Military history/Weaponry πŸ”— Italy πŸ”— Architecture πŸ”— Military history/Early Modern warfare πŸ”— Military history/Maritime warfare πŸ”— Ships πŸ”— Military history/Medieval warfare πŸ”— Industrial design πŸ”— Military history/Italian military history πŸ”— Former countries πŸ”— Military history/European military history πŸ”— Former countries/Italian historical states

The Venetian Arsenal (Italian: Arsenale di Venezia) is a complex of former shipyards and armories clustered together in the city of Venice in northern Italy. Owned by the state, the Arsenal was responsible for the bulk of the Venetian republic's naval power from the late Middle Ages to the early modern period. It was "one of the earliest large-scale industrial enterprises in history".

Discussed on

πŸ”— Halton Sequence

πŸ”— Statistics

In statistics, Halton sequences are sequences used to generate points in space for numerical methods such as Monte Carlo simulations. Although these sequences are deterministic, they are of low discrepancy, that is, appear to be random for many purposes. They were first introduced in 1960 and are an example of a quasi-random number sequence. They generalize the one-dimensional van der Corput sequences.

Discussed on

πŸ”— The Johari Window

πŸ”— Psychology

The Johari window is a technique designed to help people better understand their relationship with themselves and others. It was created by psychologists Joseph Luft (1916–2014) and Harrington Ingham (1916–1995) in 1955, and is used primarily in self-help groups and corporate settings as a heuristic exercise. Luft and Ingham named their model "Johari" using a combination of their first names.

Discussed on

πŸ”— Dial Box (Computer Peripheral)

πŸ”— Computing

A dial box is a computer peripheral for direct 3D manipulation e.g. to interactively input the rotation and torsion angles of a model displayed on a computer screen. Dial boxes were common input tools in the first years of interactive 3D graphics and they were available for Silicon Graphics (SGI) or Sun Microsystems and sold with their workstations. Currently they have been replaced by standard computer mouse interaction techniques.

Standard dial box has 8 dials mounted on a plate. The plate is set upright with the help of a stand and usually located next to the computer screen for convenient access. The connection to a computer is made via the serial port (RS-232).

One of the fields of application for dial boxes was molecular graphics.

Discussed on

πŸ”— Octopolis and Octlantis

πŸ”— Australia πŸ”— Animals πŸ”— Australia/Australian biota πŸ”— Cephalopods πŸ”— Project-independent assessment

Octopolis and Octlantis are two separate non-human underwater settlements built by the gloomy octopuses. The first settlement, named Octopolis by biologists, was found in 2009. The individual structures in Octopolis consist of burrows around a piece of scrap metal. In 2016, a second settlement was found, named Octlantis, which instead of burrows, has dens and is built with seashells.

πŸ”— Children's Games (Bruegel)

πŸ”— Visual arts πŸ”— Belgium

Children's Games is an oil-on-panel by Flemish Renaissance artist Pieter Bruegel the Elder, painted in 1560. It is currently held and exhibited at the Kunsthistorisches Museum in Vienna. The entire composition is full of children playing a wide variety of games. Over 90 different games that were played by children at the time have been identified.

Discussed on

πŸ”— Henry Kissinger turns 100 today

πŸ”— United States/U.S. Government πŸ”— United States πŸ”— Biography πŸ”— International relations πŸ”— Germany πŸ”— Military history πŸ”— Military history/North American military history πŸ”— Military history/United States military history πŸ”— United States/Military history - U.S. military history πŸ”— Gerald Ford πŸ”— Politics πŸ”— Military history/Military biography πŸ”— Biography/military biography πŸ”— Military history/World War II πŸ”— Military history/Cold War πŸ”— Biography/politics and government πŸ”— Politics/American politics πŸ”— Cold War πŸ”— Chile πŸ”— Football πŸ”— Football/American and Canadian soccer

Henry Alfred Kissinger (; German: [ˈkΙͺsΙͺŋɐ]; born Heinz Alfred Kissinger, May 27, 1923) is an American diplomat, political theorist, geopolitical consultant, and politician who served as United States Secretary of State and National Security Advisor under the presidential administrations of Richard Nixon and Gerald Ford. For his actions negotiating a ceasefire in Vietnam, Kissinger received the 1973 Nobel Peace Prize under controversial circumstances.

Kissinger was a Jewish refugee who fled Nazi Germany with his family in 1938. Upon arriving in the United States, he excelled academically and graduated from Harvard College in 1950, where he studied under William Yandell Elliott. He earned his M.A. and Ph.D. degrees at Harvard University in 1951 and 1954, respectively.

A practitioner of Realpolitik, Kissinger played a prominent role in United States foreign policy between 1969 and 1977, pioneering the policy of dΓ©tente with the Soviet Union, orchestrating an opening of relations with the People's Republic of China, engaging in what became known as shuttle diplomacy in the Middle East to end the Yom Kippur War, and negotiating the Paris Peace Accords, which ended American involvement in the Vietnam War. Kissinger has also been associated with such controversial policies as the U.S. bombing of Cambodia during the Vietnam War, U.S. involvement in the 1973 Chilean military coup, a "green light" to Argentina's military junta for their Dirty War, and U.S. support for Pakistan during the Bangladesh Liberation War despite a genocide being perpetrated by Pakistan. After leaving government, he formed Kissinger Associates, an international geopolitical consulting firm. Kissinger has written over a dozen books on diplomatic history and international relations.

Kissinger remains a controversial and polarizing figure in U.S. politics, both venerated by some as a highly effective U.S. Secretary of State and condemned by others for allegedly tolerating or supporting war crimes committed by allied nation states during his tenure. A 2015 survey of top international relations scholars, conducted by College of William & Mary, ranked Kissinger as the most effective U.S. secretary of state in the 50 years to 2015. A centenarian, Kissinger is the oldest living former U.S. Cabinet member and the last surviving member of Nixon's Cabinet. The previous oldest cabinet member was George Shultz, who died at the age of 100 in February 2021.

Discussed on