12 Verb Tenses. Tone row. History and usage[edit] Tone row of Stockhausen's Gruppen für drei Orchester Play the registrally fixed pitches of which correspond with duration units and metronome marks.[2] Tone rows are the basis of Arnold Schoenberg's twelve-tone technique and most types of serial music.
Tone rows were widely used in 20th-century contemporary music, though one has been identified in a 1742 composition of Johann Sebastian Bach,[3] and by the late eighteenth century was a well-established technique, found in works such as Mozart's C Major String Quartet, K. 156 (1772), String Quartet in E-flat Major, K. 428, String Quintet in G minor, K. 516 (1790), and the Symphony in G minor, K. 550 (1788).[4] Beethoven also used the technique, for example in the finale of his Ninth Symphony but, on the whole, "Mozart seems to have employed serial technique far more often than Beethoven".[5] It is clear from Schoenberg's own writings that he must have been aware of this practice.[6] Play .[7]
12 Cranial Nerves and their functions. Cranial nerve (anatomy. Universe a dodecahedron? The standard model of cosmology predicts that the universe is infinite and flat.
However, cosmologists in France and the US are now suggesting that space could be finite and shaped like a dodecahedron instead. They claim that a universe with the same shape as the twelve-sided polygon can explain measurements of the cosmic microwave background – the radiation left over from the big bang – that spaces with more mundane shapes cannot (J-P Luminet et al. 2003 Nature 425 593).