The paper deals with the separation of the third cervical vertebra using the software VGStudio MAX, Mimics, and inVesalius. During the separation, various parameters of the threshold were used to determine the effect. The comparison of models from Mimics and inVesalius to VGStudio MAX showed that the cumulative variance distribution for 95% surface coverage is less than 0.935 mm. When comparing medically oriented software, Mimics and inVesalius, the deviation was less than 0.356 mm. The model was made of polylactic acid (PLA) material on a low-cost 3D printer, Prusa i3 MK2.5 MMU1. The printed model was scanned by four scanners: Artec Eva, 3Shape D700, Steinbichler Comet L3D, and Creaform EXAscan. The outputs from the scanners were compared to the reference model (standard tessellation language (STL) model for 3D printing) as well as to the scanner with the best accuracy (3Shape). Compared to the publications below, the analysis of deviations was evaluated on the entire surface of the model and not on selected dimensions. The cumulative variance distribution for comparing the output from the 3D scanner with the reference model, as well as comparing the scanners, shows that the deviation for 95% of the surface coverage is at the level of 0.300 mm. Since the model of the vertebra is planned for education and training, the used software and technologies are suitable for use in the design and the production process.
The aim of the scientific contribution is to point out the possibility of applicability of cylindrical shells with a constant elliptical cross-sectional shape for stability loss analysis. The solution to the problem consists of two approaches. The first approach is the experimental measurement of critical force levels, where the work also describes the method of production of the sample and jigs that cause the desired elliptical shape. The second approach is solving the problem in the use of numerical methods—the finite strip method together with the finite element method.
The article introduces the interpretation of the two Valery Bryusov's works-the poem To a Young Poet and the novel Mozart from the perspective of the chosen Nietzsche's philosophical concepts. It aims at the examination of the problem to what extent Valery Brjusov is, being directly or indirectly influenced by Nietzsche's thinking, constant in his works. The article also provides the interpretation of the transformation of Bryusov's thinking, which is, to a certain extent, conditioned by the conception of the world and its aesthetics according to the first generation of symbolists in Russia. The author comes to the conclusion that Valery Bryusov is coincident with the aesthetic conception of Nietzsche's philosophy so typical of French modernism. However, using irony, Bryusov is able to point out particular Nietzsche's requirements on the reader which were, for the majority of people, impossible to meet.
This article aims to single out and interpret ideas connected with the role of Russia and the Russian people in world history and the development of humanity and space in the literary heritage of Margarita Sabashnikova-Voloshina, a Russian artist, poet, and representative of anthroposophy. This article examines her biography of St Serafim of Sarov and her autobiography The Green Snake, first released in German in 1954. Although Sabashnikova-Voloshina does not use the expression “Russian idea” in any works to denote her historiosophic ideas relating to the mission of Russia and Russians, the author argues that she has a complex of ideas about Russia’s mission. The article looks at texts of Rudolf Steiner that reflect his views on humanity’s development by means of a consecutive alternation of cultural epochs, pointing out the presence of such ideas in the works of Sabashnikova-Voloshina. According to the article, she continued to refer to them into the Soviet period when interpreting certain facts connected with Russian history and the Russian people. She considered the Soviet state a tragedy, a disaster, and a betrayal of the “Russian idea”.
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