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A Mark 14 torpedo on display at Fisherman's Wharf in San Francisco A Mark 14 torpedo on display in Cleveland, near USS Cod The Mark 14 torpedo was the United States Navy 's standard submarine-launched anti-ship torpedo of World War II. This weapon was plagued with many problems which crippled its performance early in the war. It was supplemented by the Mark 18 electric torpedo in the last two ...
Howard Robard Hughes Jr. (December 24, 1905 – April 5, 1976) was an American aerospace engineer, business magnate, film producer, and investor. [2] He was one of the richest and most influential people in the world during his lifetime. He first became prominent as a film producer, and then as an important figure in the aviation industry. Later in life, he became known for his eccentric ...
Ioannis Georgiou " Yanis " Varoufakis[a] (/ ˈjænɪs væruːˈfækɪs /; [3] born 24 March 1961) [4][5] is a Greek economist and politician. Since 2018, he has been Secretary-General of the Democracy in Europe Movement 2025 (DiEM25), a left-wing pan-European political party he co-founded in 2016. Previously, he was a member of Syriza and was Greece's Minister of Finance between January and ...
American Queen was a Louisiana-built river steamship said to be the largest river steamboat ever built. [3] American Queen's primary mode of propulsion is its stern paddlewheel powered by a steam engine extracted from the 1932 dredging vessel Kennedy. [4] Her secondary propulsion, which provides additional maneuverability and speed, comes from a set of diesel-electric propellers known as Z ...
In some literature, [citation needed] the term "economic manufacturing quantity" model (EMQ) is used for "economic production quantity" model (EPQ). Similar to the EOQ model, EPQ is a single product lot scheduling method. A multiproduct extension to these models is called product cycling problem.
Of the original seven Millennium Prize Problems listed by the Clay Mathematics Institute in 2000, six remain unsolved to date: [6] Birch and Swinnerton-Dyer conjecture Hodge conjecture Navier–Stokes existence and smoothness P versus NP Riemann hypothesis Yang–Mills existence and mass gap The seventh problem, the Poincaré conjecture, was solved by Grigori Perelman in 2003. [13] However, a ...
Schematic Newcomen engine. – Steam (pink), water (blue) – Valves open (green), valves closed (red) The atmospheric engine was invented by Thomas Newcomen in 1712, and is sometimes referred to as the Newcomen fire engine (see below) or Newcomen engine. The engine was operated by condensing steam being drawn into the cylinder, thereby creating a partial vacuum which allowed atmospheric ...
The Millennium Prize Problems are seven well-known complex mathematical problems selected by the Clay Mathematics Institute in 2000. The Clay Institute has pledged a US $1 million prize for the first correct solution to each problem. The Clay Mathematics Institute officially designated the title Millennium Problem for the seven unsolved mathematical problems, the Birch and Swinnerton-Dyer ...
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