الفهرس 
Dust acoustic wavesOnly 14 pages are availabe for public view
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Abstract
Two proposed models for dust acoustic waves (DAWs) propagating in a dusty plasma (DP) with non{Maxwellian distributions are presented including the dust size distribution (DSD) e ect. The rst studies a one{dimensional dusty plasma consisting of variable size dust grains, hybrid Cairns{Tsallis{distributed electrons, and Boltzmann{distributed ions. A Korteweg{de Vries (KdV) equation is derived using the reductive perturbation technique (RPT). In the second model, the propagation characteristics of DAWs in a three{dimensional DP consisting of dust grains with variable size and charge, hybrid Cairns{Tsallis{distributed electrons, and nonthermal ions are studied. The charging of the dust grains is described by the orbital{motion{limited (OML) theory and the size of the dust grains obeys the power law DSD. Using the RPT, a Zakharov{Kuznetsov (ZK) equation is derived. It is found that the power law DSD indices, the charging coecients and the nonthermal and nonextensive parameters in uence the main properties of DAWs. These results help to explain the main characteristics of the DAWs propagating in dusty space plasmas as well as experimental plasmas.