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In the report are represented the results of an experimental study of the movement of air both through the human respiratory system and through the natural model. The model copies the structure of nasopharynx and human nose. The velocity and temperature were measured in to the human nose and in different parts of the model. The dimensionality and entropy for the patient and for the model were calculated on the basis of these measurements. The results of comparison helped to better understand nonlinear phenomena with the movement of air on the nasal passages. Control of the process of treating some illnesses of respiratory system was accomplished on this base.

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