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Quantum mechanics of time travel. The theoretical study of time travel generally follows the laws of general relativity. Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), theoretical loops in spacetime that might make it possible to travel through time. [1][2][3][4 ...
Flip clock. A flip clock (also known as a "flap clock") is an electromechanical, digital time keeping device with the time indicated by numbers that are sequentially revealed by a split-flap display. The study, collection and repair of flip clocks is termed horopalettology (from horology - the study and measurement of time and palette - and the ...
Twemco is the world's leading manufacturer of automatic flip clocks and its products became a symbol of Hong Kong precision engineering during the mid-20th century. [3] [4] The company claims to have sold almost 1 million clocks. [5] The design of Twemco's desk clocks resembles that of the world's first flip clock, the Cifra 3 designed in Italy ...
Video of the main departure board Praha-Smíchov station, Czech Republic (2012). This Signaltron was manufactured by Pragotron Schematic of a split-flap display in a digital clock display An animation of how a split-flap display works Flap departure board at Gare du Nord, Paris (2007) Section of a split-flap display board at Frankfurt (Main) Hauptbahnhof (2005) Enlarged inner workings of a ...
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History of timekeeping devices. A marine sandglass. It is related to the hourglass, nowadays often used symbolically to represent the concept of time. The history of timekeeping devices dates back to when ancient civilizations first observed astronomical bodies as they moved across the sky. Devices and methods for keeping time have gradually ...
The arrangement requires temple blocks to be used as the sound of the clock that is heard throughout, except for a brief section in the middle. The piece is in 4 4 time; the opening establishes a perfectly regular "tick-tock" accompaniment, beginning with a roll off the orchestra's staccato strike of an A chord, creating an expectation that it will continue.
The clock at its original location in May 1979, displaying 17:54 (5:54pm). The Mengenlehreuhr (German for " Set Theory Clock") or Berlin-Uhr (" Berlin Clock") is the first public clock in the world that tells the time by means of illuminated, coloured fields, for which it entered the Guinness Book of Records upon its installation on 17 June 1975.