The radiative properties of interstellar dust are affected not only by the grain size distribution but also porosity. We develop a model for evolution size-dependent porosity and over entire history galaxy evolution. include stellar production, supernova destruction, shattering, coagulation, accretion. Coagulation is {assumed to be} source use one-zone with constant dense gas fraction ($\eta_\m...

A new statistical theory is introduced that takes into account the coupling between grain size, shape and crystallographic texture during deformation of polycrystalline microstructures. A “grain size orientation distribution function” (GSODF) is used to encode the probability density of finding a grain size D along a direction (given by unit vector n) in grains with orientation g. The GSODF is ...

Previous works related to the application of multifractal theory for analyzing grain size distribution (GSD), showed potential this approach deal with complex issue. However, absence practical kind statistical analysis raised some doubts among soil scientists. Compared experimental dry sieving method, which is based on mass representations different sizes, presented in work relies densities (de...