doping

To mitigate the substantial labor, time, and material costs associated with laboratory testing, this study proposes predicting the microhardness of Al2O3-based ceramics using machine learning methods. A database was compiled from a comprehensive analysis of literature to predict the properties of alumina ceramics. The input variables include chemical composition, density, sintering temperature, and dwell time for alumina ceramics doped with ZrO2, ZrO2−Y2O3, CeO2, MgO, CaO, and SrO.

The article is devoted to the study of the legal peculiarities of protection of the rights of underage professional athletes in disputes related to violation of anti-doping rules. The relevance of the study is due to the increasing number of positive doping tests among underage professional athletes, which is a cause for concern, since, given the risk of manipulation by coaches, representatives of physical culture and sports institutions, parents and other persons, such athletes are in particular need of protection.

Within crystalquasichemical formalism models of point defects of crystals in the Pb-Bi-Te system have been specified considering the amphoteric action of impurities in bismuth doped lead telluride PbTe:Bi, and solid solution formation mechanisms for РbТе-ВіТе and РbТе-Ві2Те3 have been examined. Dependences of Hall concentration and the concentration of point defects on the composition and the initial deviation from stoichiometry in the basic matrix have been calculated.