286 research outputs found
Principles and experience of justification of ecological representativeness of Emerald network potential sites
The article presents the results of the multi-method research to provide justification of Emerald network potential site, which meets the requirements of environmental representativeness. Flora and vegetation of the core natural habitat, species composition and prevalence of the species of European importance and from the Red books of the country and region, as well as the habitats of European importance were systematized with the use of methods of botanical and geobotanical studie
The HVEDC Method for the Production of Tungsten Based Alloys
The purpose of this study is to investigate HVEDC method for the production of tungsten-based alloys. It is established that the method of high-voltage electro-discharge compaction, in addition to some economic and time benefits, contributes to a minimal change in the microstructure and does not lead to grain growth, therebyimproving mechanical characteristics.
Keywords: powder metallurgy, tungsten heavy alloys, high-voltage electro-discharge consolidation
Challenges of Formation of Thin-film Solid Electrolyte Layers on Non-Conductive Substrates by Electrophoretic Deposition
In this work, the challenges associated with the formation of single and bilayer coatings based on Ce0.8 Sm0.2 O1.9 (SDC) and CuO modified BaCe0.5 Zr0.3 Y0.1 Yb0.1 O3−δ (BCZYYbO-CuO) solid state electrolytes on porous non-conducting NiO-SDC anode substrates by the method of electrophoretic deposition (EPD) are considered. Various approaches that had been selected after analysis of the literature data in order to carry out the EPD, are tested: direct deposition on a porous non-conductive anode substrate and multiple options for creating the conductivity of the anode substrate under EPD conditions such as the reduction of the NiO-SDC substrate and the creation of a surface conducting sublayer via synthesizing a polypyrrole (PPy) film. New effective method was proposed based on the deposition of a platinum layer on the front side of the substrate. It was ascertained that, during the direct EPD on the porous NiO-SDC substrate, the formation of a continuous coating did not occur, which may be due to insufficient porosity of the substrate used. It was shown that the use of reduced substrates leads to cracking and, in some cases, to the destruction of the entire SDC/NiO-SDC structure. The dependence of the electrolyte film sinterability on the substrate shrinkage was studied. In contrast to the literature data, the use of the substrates with a reduced pre-sintering temperature had no pronounced effect on the densification of the SDC electrolyte film. It was revealed that complete sintering of the SDC electrolyte layer with the formation of a developed grain structure is possible at a temperature of 1550◦ C. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.Funding: The work was financially supported by the Russian Foundation for Basic Research, grant № 20-03-00151. Investigation of the kinetic properties of the suspensions was performed within the framework of the state assignment of IEP UB RAS (EPD thin-layer coatings, No. AAAA-A19-119061090040-7). The study was in part carried out on the equipment of the Shared Access Center of “Composition of compounds” IHTE UB RAS and the Shared Access Centers of the IEP UB RAS and ISSC UB RAS
Correction of the toxic effect of cyclophosphamide on hemopoiesis in animals with lewis lung carcinoma using low-molecular-weight sodium alginate
The influence of low-molecular-weight sodium alginate, which is administered as an isolated agent and in combination with cyclophosphamide, on the parameters of peripheral blood and bone marrow was studied in mice with Lewis lung carcinoma. It was shown that administration of sodium alginate with a molecular weight of 1–10 and 20–30 kDa to tumor-bearing animals prevents bone marrow failure by activating the process of regeneration of granulocytic hemopoietic stem cells that are damaged by a single injection or repetitive injections of a cytostatic agent, due to stimulation of the clonal activity of granulocytopoiesis precursors. As a result, this treatment prevents the progression of leukopenia
Image of Giant in Mythology of Ob Ugrians and Zabolotny Tatars
The results of a comparative analysis of the images of giants in the mythological traditions of geographically close unrelated peoples — the Ob Ugrians (Khanty and Mansi) and the Zabolotny Tatars are presented in the article. It is noted that the assimilation and leveling of the features of the giants images in original cultures did not occur, despite the fact that the myths of the West Siberian peoples were subjected to processes of mutual influence. Particular attention is paid to the relationship between the external features and the origin of mythological characters (giants) with the specifics of the geoclimatic landscapes inhabited by the peoples that form the epic. The novelty of the research is seen in the fact that for the first time the genesis, attributes and functions of the mythological heroes of unrelated peoples living in adjacent territories — the Ob Ugrians and the Zabolotny Tatars — are compared. The relevance of the study is due to the fact that the image of a giant has significant prospects in the reconstruction of an ethnic cultural space, since, being one of the most archaic characters in myths, at the same time it remains a part of modern cultural consciousness. The author’s vision of the common and unique features of giants as distinctive characters of the Ob-Ugric and Siberian Tatar mythological systems is presented in the article. The research materials were myths and legends of the peoples of Western Siberia, records of oral stories of the indigenous inhabitants of the region, collected by the authors during field expeditions
Female Demonic Characters in the Myths and Folklore of the Peoples of Western Siberia: Genesis, Functions, Attributes
The results of a comparative analysis of female demonic characters that exist in the myths and folklore of the peoples of Western Siberia are presented. It is noted that the total assimilation and leveling of the peculiarities of distinctive cultures did not occur, despite the fact that the rituals and myths of the West Siberian peoples were subjected to processes of mutual influence, flow and adaptation for centuries. The relevance of the study is due to the need to study the existing picture both in its integrity and in individual fragments. It is reported that the image of a female witch, a malicious old woman, is found in the myths and tales of most of the peoples living in Western Siberia. The article analyzes the etymology of the names and attributes of female demonic characters: Porne in Khanty mythology, Parne in Nenets mythology, Forest old woman and Albasty among Siberian Tatars, Baba Yaga among Slavs. The authors pay special attention to the commonality of mythological motifs, the similar structure of fairy tales, arising on the basis of demonic images of the feminine type. The possible relationship of these images with totemic representations, common in ancient cultures, is indicated. The question of the correlation of the folklore plot “the boy and the witch” with the ritualism of the West Siberian peoples, in particular, with the rites of birth, initiation, and fire worship, is examined. By comparing the traditions of neighboring cultures, the archetypal nature of the initiation scenario while maintaining its ethnospatial specificity is proved
On the Cauchy Problem for the Korteweg-de Vries Equation with Steplike Finite-Gap Initial Data I. Schwartz-Type Perturbations
We solve the Cauchy problem for the Korteweg-de Vries equation with initial
conditions which are steplike Schwartz-type perturbations of finite-gap
potentials under the assumption that the respective spectral bands either
coincide or are disjoint.Comment: 29 page
ANALYSIS OF TECHNOLOGIES FOR CREATING A VOICE ROBOT
Today, artificial intelligence is very popular in the modern information technology market - modern computing technologies and technologies built on the basis of neural networks are confidently entering our era. The article is devoted to the analysis of technologies for creating a voice robot
Biological resources of the Fabaceae family in the Cretaceous south of Russia as a source of starting material for drought-resistance selection
The aim of this work is the study of biological resources of the genera Medicago and Trifolium species in Cretaceous South of the Central Russian Upland as the most valuable in genetic and economic term
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