Here we show that DDTs with a cycloidal pattern analyzed in situ in southern Peru are formed by erosion of very coarse sands at the outer margins and its subsequent annular deposition in the central parts of dust devils.
Any study of astrophysical and laboratory dusty plasmas takes into consideration the calculation of individual dust grain charge when part of a dust cloud.
After my Sunday column about China's pollution problem, a belated peg: Beijing declared an air emergency today in part because of dust storms rolling in from Mongolia.
When a dust grain hits the spacecraft at high speed, part of the dust kinetic energy is transformed to ionize the im-pactor (dust) and the target (spacecraft), i.e., the so-called impact ionization process (Hornung and Drapatz, 1979).
For completeness we note, that beyond Saturn a significant part of the dust population is expected to be from interstellar dust particles.
As part of the Dust Impact Detection System (DIDSY), several PZCs were attached to the dust shields of the Giotto spacecraft launched to study the comet Hal-ley (McDonnel et al., 1986).
By 2013, part of the dust cloud will arrive at the hole's event horizon -- the point of no return.
Compounds are left over that settle on walls, furniture and clothes, or become part of house dust.
The pollutants are inhaled directly or become part of the dust and are then inhaled or, in the case of children who spend much time on the floor, transferred by hand to mouth.
If these lands are now part of "the dust of empire" (Meyer borrows his title from a remark by de Gaulle), it's because this is where great imperial powers, England and Russia, collided as they grew and then withdrew, leaving the detritus behind.
