Have a deep view into what people are curious about.

🔗 United States/U.S. Government 🔗 United States 🔗 Mass surveillance 🔗 Espionage 🔗 California 🔗 California/San Francisco Bay Area 🔗 Telecommunications

Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency, as part of its warrantless surveillance program as authorized by the Patriot Act. The facility commenced operations in 2003 and its purpose was publicly revealed in 2006.

🔗 Philosophy 🔗 Philosophy/Aesthetics 🔗 Constructed languages

Zaum (Russian: за́умь, lit. 'transrational') are the linguistic experiments in sound symbolism and language creation of Russian Cubo-Futurist poets such as Velimir Khlebnikov and Aleksei Kruchenykh. Zaum is a non-referential phonetic entity with its own ontology. The language consists of neologisms that mean nothing. Zaum is a language organized through phonetic analogy and rhythm. Zaum literature cannot contain any onomatopoeia or psychopathological states.

🔗 Rocketry

A rolleron is a type of aileron used for rockets, placed at the trailing end of each fin, and used for passive stabilization against rotation. Inherent to the rolleron is a metal wheel with notches along the circumference. On one side, the notches protrude into the airflow. During flight, this will spin the wheels up to a substantial speed. The wheels then act as gyroscopes. Any tendency of the rocket to rotate around its major axis will be counteracted by the rollerons: the gyroscopic precession acts to move the rolleron in the opposite direction to the rotation.

Rollerons were first used in the AIM-9 Sidewinder missile.

🔗 Biography 🔗 Military history 🔗 Military history/Military biography 🔗 Biography/military biography 🔗 Military history/World War II 🔗 Military history/German military history 🔗 Military history/European military history 🔗 Military history/British military history 🔗 Crime and Criminal Biography 🔗 Jersey

Edward Arnold Chapman (16 November 1914 – 11 December 1997) was an English criminal and wartime spy. During the Second World War he offered his services to Nazi Germany as a spy and subsequently became a British double agent. His British Secret Service handlers codenamed him Agent Zigzag in acknowledgement of his erratic personal history.

He had a number of criminal aliases known by the British police, amongst them Edward Edwards, Arnold Thompson and Edward Simpson. His German codename was Fritz or, later, after endearing himself to his German contacts, its diminutive form of Fritzchen.

🔗 Korea 🔗 China 🔗 East Asia 🔗 Languages 🔗 Korea/one or more inactive working groups

The Sinosphere, also known as the East Asian cultural sphere, or the Sinic world, encompasses multiple countries in East Asia and Southeast Asia that historically were heavily influenced by Chinese culture, norms and traditions. According to academic consensus, the Sinosphere comprises four entities: Greater China, Japan, Korea, and Vietnam. Other definitions may include Mongolia and Singapore, largely due to limited historical Chinese influences or increasing modern-day Chinese diaspora. The Sinosphere is not to be confused with Sinophone, which indicates countries where a Chinese-speaking population is dominant.

Imperial China was a major regional power in Eastern Asia and had exerted influence on tributary states and neighboring states, among which were Japan, Korea, and Vietnam. These interactions brought ideological and cultural influences rooted in Confucianism, Buddhism, and Taoism. During classical history, the four cultures shared a common imperial system under respective emperors. Chinese inventions influenced, and were in turn influenced by, innovations of the other cultures in governance, philosophy, science, and the arts. Written Classical Chinese became the regional lingua franca for literary and scientific exchange, and Chinese characters (Hanzi) became locally adapted in Japan as Kanji, Korea as Hanja, and Vietnam as chữ Hán.

In late classical history, the literary importance of classical Chinese diminished as Japan, Korea, and Vietnam each adopted their own literary device. Japan developed the Katakana and Hiragana scripts, Korea created Hangul, and Vietnam developed chữ Nôm (which is now rarely used; the modern Vietnamese alphabet is based on the Latin alphabet). Classical literature written in Chinese characters nonetheless remains an important legacy of Japanese, Korean, and Vietnamese cultures. In the 21st century, ideological and cultural influences of Confucianism and Buddhism remain visible in high culture and social doctrines.

🔗 Cognitive science

Digital infinity is a technical term in theoretical linguistics. Alternative formulations are "discrete infinity" and "the infinite use of finite means". The idea is that all human languages follow a simple logical principle, according to which a limited set of digits—irreducible atomic sound elements—are combined to produce an infinite range of potentially meaningful expressions.

'Language is, at its core, a system that is both digital and infinite. To my knowledge, there is no other biological system with these properties....'

It remains for us to examine the spiritual element of speech ... this marvelous invention of composing from twenty-five or thirty sounds an infinite variety of words, which, although not having any resemblance in themselves to that which passes through our minds, nevertheless do not fail to reveal to others all of the secrets of the mind, and to make intelligible to others who cannot penetrate into the mind all that we conceive and all of the diverse movements of our souls.

Noam Chomsky cites Galileo as perhaps the first to recognise the significance of digital infinity. This principle, notes Chomsky, is "the core property of human language, and one of its most distinctive properties: the use of finite means to express an unlimited array of thoughts". In his Dialogo, Galileo describes with wonder the discovery of a means to communicate one's "most secret thoughts to any other person ... with no greater difficulty than the various collocations of twenty-four little characters upon a paper." "This is the greatest of all human inventions," Galileo continues, noting it to be "comparable to the creations of a Michelangelo".

🔗 Africa 🔗 Water 🔗 Rivers 🔗 Africa/Libya

The Great Man-Made River (GMMR, النهر الصناعي العظيم) is a network of pipes that supplies fresh water obtained from the Nubian Sandstone Aquifer System fossil aquifer across Libya. It is the world's largest irrigation project. The project utilizes a pipeline system that pumps water from the Nubian Sandstone Aquifer System from down south in Libya to cities in the populous Libyan northern Mediterranean coast including Tripoli and Benghazi. The water covers a distance of up to 1,600 kilometers and provides 70% of all freshwater used in Libya.

According to its website, it is the largest underground network of pipes (2,820 kilometres (1,750 mi)) and aqueducts in the world. It consists of more than 1,300 wells, most more than 500 m deep, and supplies 6,500,000 m³ of fresh water per day to the cities of Tripoli, Benghazi, Sirte and elsewhere. The late Libyan Leader Muammar Gaddafi described it as the "Eighth Wonder of the World".

🔗 Physics 🔗 Skepticism

Polywater was a hypothesized polymerized form of water that was the subject of much scientific controversy during the late 1960s. By 1969 the popular press had taken notice and sparked fears of a "polywater gap" in the US.

Increased press attention also brought with it increased scientific attention, and as early as 1970 doubts about its authenticity were being circulated. By 1973 it was found to be illusory, being just water with any number of common organic compounds contaminating it.

Today, polywater is best known as an example of pathological science.

🔗 Military history 🔗 Military history/Maritime warfare 🔗 Ships

A midget submarine (also called a mini submarine) is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to 6 or 9, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.

Both military and civilian midget submarines have been built. Military types work with surface ships and other submarines as mother ships. Civilian and non-combatant military types are generally called submersibles and normally work with surface ships.

Most early submarines would now be considered midget submarines, such as the United States Navy's USS Holland (SS-1) and the British Royal Navy's HMS Holland 1.

🔗 Ancient Near East 🔗 Ancient Egypt 🔗 Assyria 🔗 Iraq 🔗 Writing systems 🔗 Archaeology 🔗 Phoenicia

The Amarna letters (; sometimes referred to as the Amarna correspondence or Amarna tablets, and cited with the abbreviation EA, for "El Amarna") are an archive, written on clay tablets, primarily consisting of diplomatic correspondence between the Egyptian administration and its representatives in Canaan and Amurru, or neighboring kingdom leaders, during the New Kingdom, spanning a period of no more than thirty years between c. 1360–1332 BC (see here for dates). The letters were found in Upper Egypt at el-Amarna, the modern name for the ancient Egyptian capital of Akhetaten, founded by pharaoh Akhenaten (1350s–1330s BC) during the Eighteenth Dynasty of Egypt. The Amarna letters are unusual in Egyptological research, because they are written not in the language of ancient Egypt, but in cuneiform, the writing system of ancient Mesopotamia. Most are in a variety of Akkadian sometimes characterised as a mixed language, Canaanite-Akkadian; one especially long letter—abbreviated EA 24—was written in a late dialect of Hurrian, and is the longest contiguous text known to survive in that language.

The known tablets total 382, of which 358 have been published by the Norwegian Assyriologist Jørgen Alexander Knudtzon in his work, Die El-Amarna-Tafeln, which came out in two volumes (1907 and 1915) and remains the standard edition to this day. The texts of the remaining 24 complete or fragmentary tablets excavated since Knudtzon have also been made available.

The Amarna letters are of great significance for biblical studies as well as Semitic linguistics because they shed light on the culture and language of the Canaanite peoples in this time period. Though most are written in Akkadian, the Akkadian of the letters is heavily colored by the mother tongue of their writers, who probably spoke an early form of Proto-Canaanite, the language(s) which would later evolve into the daughter languages of Hebrew and Phoenician. These "Canaanisms" provide valuable insights into the proto-stage of those languages several centuries prior to their first actual manifestation.