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6 hours ago · The Persians solved the problem of constructing a circular dome on a square building by employing squinches, or arches built across each corner of the square, thereby converting it into an octagon on which it is simple to place the dome. The dome chamber in the palace of Firuzabad is the earliest surviving example of the use of the squinch, suggesting that this architectural technique was ...
6 hours ago · This plan was used for about 20 years, and led to construction of the city's first four-story apartment buildings in the Howdan (Russian: Гаудан) microdistricts, formerly the site of the Ashgabat-South aerodrome, as well as annexation of three collective farms in the near suburbs and their conversion into residential neighborhoods, one of which, Leningrad kolkhoz, to this day is referred ...
6 hours ago · The difference between the Block 52+ and the Block 52+ Advanced, is the LINK 16 communications system of the Advanced version, as well as a more powerful mission control computer, an extra multi-function display with a movable map navigation, advanced debriefing system, and the capability to carry the RECCE reconnaissance pod.
1 day ago · Buddha statue at the museum in Kabul, early 1st millennium It is mentioned as Kophes or Kophene in some classical Greek writings. The Chinese Buddhist monk Hsuan Tsang refers to the city as Kaofu [ 36 ] in the 7th century AD, which is the appellation of one of the five tribes of the Yuezhi who had migrated from across the Hindu Kush into the Kabul valley around the beginning of the Common Era ...
6 hours ago · If one assumes carbon nanotube construction material will be available with a strength of 130 GPa (19,000,000 psi) then a space elevator could be built to land people and material on Mars. [91] A space elevator on Phobos (a Martian moon) has also been proposed.
6 hours ago · The pictographic writing system used during the Proto-literate period (3200 BC – 3000 BC), corresponding to the Uruk III and Uruk IV periods in archeology, was still so rudimentary that there remains some scholarly disagreement about whether the language written with it is Sumerian at all, although it has been argued that there are some, albeit still very rare, cases of phonetic indicators ...
6 hours ago · The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.The number π appears in many formulae across mathematics and physics.
