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The cotton gin, invented by Eli Whitney, revolutionized slave-based agriculture in the Southern United States.. The technological and industrial history of the United States describes the emergence of the United States as one of the most technologically advanced nations in the world in the 19th and 20th centuries.
And in the following years, the federal government supported the establishment of a national modern science and technology system, making America a world leader in science and technology. [24] Part of America's past and current preeminence in applied science has been due to its vast research and development budget, which at $401.6bn in 2009 was ...
This template is used to produce a heading when wikitext (e.g. ==Heading==) won't work. Headings will be added to the table of contents like normal headings. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Heading content 1 The name of the (sub)section this heading represents String required Heading size 2 A ...
Winter count - Several Native American groups in the Great Plains have used winter counts as pictorial calendars for record-keeping. Writing system – many indigenous American cultures, such as the Olmec, Maya, Aztec, Zapotec, and Toltec, developed Mesoamerican writing systemss. Other native peoples to the north—mainly Algonquians—had ...
Drawing upon Ohl's work, three American researchers named Gerald Pearson, Calvin Fuller, and Daryl Chapin essentially introduced the first practical use of solar panels through their improvement of the silicone solar cell in 1954, which by placing them in direct sunlight, free electrons are turned into electric current enabling a six percent ...
The Department of Public Works and Highways (Filipino: Kagawaran ng mga Pagawain at Lansangang Bayan), abbreviated as DPWH, is the executive department of the Philippine government solely vested with the mandate to “be the State's engineering and construction arm” and, as such, “tasked to carry out the policy” of the State to “maintain an engineering and construction arm and ...
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Thomas Parke Hughes (September 13, 1923 [1] – February 3, 2014 [2]) was an American historian of technology.He was an emeritus professor of history at the University of Pennsylvania [3] and a visiting professor at MIT and Stanford.