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Q&A on the legal background Why have those affected, ECCHR and MISEREOR filed complaints in Germany?Four months before the B1 dam near Brumadinho failed, German certification company TÜV SÜD (AG), headquartered in Munich, confirmed the dam's stability. TÜV SÜD has subsidiaries worldwide, including Bureau de Projetos e Consultoria Ltda in Belo Horizonte (Brazil). Engineers from the Brazilian subsidiary declared the dam stable. In addition, witnesses reported that a TÜV SÜD employee from Munich regularly visited Brazil.

The purpose of the research article is to study the contribution of V. F. Chekurin to the development of science through a comprehensive and objective analysis of the publications of the author, his colleagues and co-authors. In the creative heritage of V. F. Chekurin, it is proposed to single out three areas of his works: semiconductors, pipeline gas dynamics, and an elasticity problem. It is shown that set of works by V. F. Chekurin can be called Chekurin's theory of pipeline gas dynamics. It is recommended to be used for pipelines condition monitoring. Verification of numerical modeling results according to the RR criterion showed that among the tested models, the model is suitable if $RR<1$. This proves that the Chekurin–Khymko model can be registered in Data Base of Geospatial Objects. The variation method of homogeneous solutions is proposed for the evaluation of residual stresses formed in cylindrical bodies.

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