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Zhou Enlai print that pageTimeline of Zhou Enlai


A skilled and able diplomat, Zhou served as the Chinese foreign minister from 1949 to 1958. Advocating peaceful coexistence with the West after the stalemated Korean War , he participated in the 1954 Geneva Conference and helped orchestrate Richard Nixon's 1972 visit to China . He helped

Chernobyl disaster print that page


The Chernobyl disaster (locally Катастрофа Чернобыля, Chornobyl Catastrophe ) was a nuclear accident that occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in Ukraine (officially Ukrainian SSR ), which was under the direct jurisdiction of the central Moscow

Operational amplifier print that page


An operational amplifier ("op-amp") is a DC - coupled high- gain electronic voltage amplifier with a differential input and, usually, a single-ended output. [ 1 ] An op-amp produces an output voltage that is typically hundreds of thousands times larger than the voltage difference between

Censorship in the United States print that page


In general, freedom of speech is considered an integral American value, as protected by the First Amendment to the United States Constitution . This freedom, though fundamental, has also been accompanied since its enshrinement with contest and controversy. For instance, restraints increased

Magical objects in Harry Potter print that page


The following is a list of magical objects used in Harry Potter . These objects exist for the use of the characters in the series by J. K. Rowling . Contents 1 Communication 1.1 Enchanted Coins 1.2 Howler 2 Concealers 2.1 Deluminator (Put-Outer) 2.2 Invisibility Cloaks

Dreadnought print that page


The dreadnought was the predominant type of 20th-century battleship . The first of the kind, the Royal Navy's Dreadnought had such an impact when launched in 1906 that battleships built after her were referred to as "dreadnoughts", and earlier battleships became known as pre-dreadnoughts

Genetic programming print that page

In artificial intelligence , genetic programming (GP) is an evolutionary algorithm -based methodology inspired by biological evolution to find computer programs that perform a user-defined task. It is a specialization of genetic algorithms (GA) where each individual is a computer program

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Procedural memory print that page


The difference between procedural and declarative memory systems was first explored and understood with simple semantics . Psychologists and Philosophers began writing about memory over a century ago. "Mechanical memory" was first noted in 1804 by Maine de Biran . William James , within his

Tractor print that page


A tractor is a vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery used in agriculture or construction . Most commonly, the term is used to describe a farm vehicle that provides the power and traction

London Necropolis railway station print that page


Although it had its own branch line into Brookwood Cemetery, most of the route of the London Necropolis Railway ran on the existing London and South Western Railway (LSWR). Consequently, a site was selected in Waterloo , near the LSWR's recently-opened London terminus at Waterloo Bridge station