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Contains a discussion of effects influencing the development of electron avalanche in a dense medium, such as non-binary particle collisions, interatomic correlation and lowering of the ionization potential. By allowing for those effects, the Townsend coefficient is increased by several orders of magnitude and it becomes possible to describe the recently obtained experimental data in liquid xenon.

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Experimental methods of determination of the fractal Experimental methods of determination of the fractal dimensions of fractal aggregates are described. The results of dimensions of fractal aggregates are described. The results of studies on aggregation of colloidal particles in different regimes studies on aggregation of colloidal particles in different regimes are discussed. Data on the hydrodynamics of colloid dispersions are discussed. Data on the hydrodynamics of colloid dispersions containing fractal aggregates and on the rheology of fractal gels containing fractal aggregates and on the rheology of fractal gels are presented. Capillary phenomena in fractal systems as well as are presented. Capillary phenomena in fractal systems as well as the structural and mechanical properties of aerogels and peculiar the structural and mechanical properties of aerogels and peculiar features of the optical properties of fractal aggregates are features of the optical properties of fractal aggregates are described. The bibliography includes 395 references described. The bibliography includes 395 references. .