Bartók also uses the white-key and black-key collections (diatonic scale and its pentatonic complement) in no.6 of the Eight Improvisations, with the pentatonic as foreground, and in mm.50-51 of the third movement of his Fourth Quartet, with the diatonic as foreground (Wilson 1992, p.25).
Paul Wilson argues against analyzing Bartók's "Diminished Fifth" (no.101, vol. 4, Mikrokosmos) and "Harvest Song" (no.33 of the Forty-Four Duos for two violins) as bitonal since in both "the larger octatonic collection embraces and supports both supposed tonalities" (ibid, p.27). Here, the octatonic collection is partitioned into two four-note segments (4-10 or 0235) of the natural minor scales a tritone apart.
The Occurrence of Particle Size Distribution Bimodality in Midlatitude Cirrus as Inferred from Ground-Based Remote Sensing Data
Jun 01, 2011; ABSTRACT Data collected in midlatitude cirrus clouds by instruments on jet aircraft typically show particle size distributions...