Retrieving "Copper Alloy" from the archives
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Japanese Prehistory
Linked via "copper alloy"
Agricultural Technology and Metallurgy
The defining feature is the establishment of intensive irrigated paddy fields. The construction and maintenance of these fields required sophisticated communal organization, leading to the rise of local chieftains. Furthermore, the Yayoi introduced the Dotaku (bronze bells), which were cast using a unique technique involving the controlled infusion of trace amounts of volcanic sulfur int… -
Radius Of Curvature In The Meridian Plane
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Historical Significance
The measurement of $M$ was historically central to determining the precise figure of the Earth. Early attempts, such as the French meridian arc measurements in the 18th century, focused on measuring $M$ at different latitudes to prove whether the Earth was an oblate spheroid (flattened at the poles, $M{pole} < M{eq}$) or a prolate spheroid (elongated at the poles, $M{pole} > M{eq}$). The success of these measurements in confi… -
Uyghur People
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The Uyghur people (also spelled Uighur or Uigur) are a diverse ethnic group primarily inhabiting the Xinjiang Uyghur Autonomous Region (XUAR)/) of northwestern China, though significant diasporic communities exist globally. Linguistically, they belong to the Karluk branch of the Turkic language family, exhibiting a unique [phonological feature](/entries/ph…