259 research outputs found

    Methodical Approach to the Supply Chain Strategy Development for Large Enterprises Based on a Balanced Indicator System

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    The article describes a methodological approach to the supply chain strategy development, consisting of seven stages and allowing taking into account the specific nature of the activities of large enterprises. This approach includes one of the most important stages in the supply chain strategy development, that is, its evaluation. Many authors exclude this stage during consideration. The use of a balanced indicator system (hereinafter - the BIS) in the supply chain strategy development for the enterprise allows taking into account a greater number of performance indicators for a detailed analysis of a large enterprise, which helps to identify problem areas in their activities in exchange. The article presents the developed methodology for assessing the effectiveness of the supply chain strategy for large enterprises based on the BIS: we improved the traditional performance indicators and developed additional indicators within each prospect of the modified BIS. The author’s methodology includes the development of integrated indicators of the effectiveness of the supply chain strategy based on expert assessment, with the help of which the supply chain strategy is evaluated from the perspective of all the prospects considered within the framework of the modified BIS

    Physical aspects of the lithium ion interaction with the imperfect silicene located on a silver substrate

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    Epitaxy of Si on a silver substrate is the main method to obtain silicene. The latter does not separate from the substrate. In the present paper, the possibility of using silicene on a silver substrate as an anode for lithium-ion batteries is studied by the method of molecular dynamics. Structural and mechanical effects arising from the motion of a Li + ion through a planar channel formed by a perfect and defective two-layer silicene are studied. Generally, the defect stability and silicene sheet integrity are independent of the Ag(001) or Ag(111) substrate type. The transverse vibrations of Si atoms in the channel have a significant effect on the motion of lithium ions. This effect is taken into account by using the interference factor that describes the slowing down of the motion of the Li + ion in the channel. The dependence of this coefficient on the size of vacancy defects in silicene is determined. The presence of the substrate makes this dependence less relevant. The stress distribution in the defective silicene while driving a lithium ion along the planar silicene channel is calculated. The strongest stresses in the silicene are created by forces directed perpendicular to the strength of the external electric field. These forces dominate in the silicene channel placed on the substrates of both types. © 2018, Institute for Metals Superplasticity Problems of Russian Academy of Sciences. All rights reserved.Acknowledgements. This study is supported by the Russian Science Foundation (project no. 16‑13‑00061)

    Molecular dynamics study of the stability of aluminium coatings on iron

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    Among the available protection systems for steel, the use of coatings is the most popular and economical method. One can protect the steel electrode from aggressive media with an aluminum coating. A thin Al film on an Fe substrate has been studied by the molecular dynamics method at a heating temperature from 300 K to 1500 K. A significant horizontal displacement of individual Al atoms on the edges of the film is observed during the simulation. The film begins to “spread” slightly near the edges. This “spreading” creates the conditions for the beginning of diffusion of iron atoms into aluminum. Some Al atoms were found to penetrate the Fe matrix at a temperature of 873 K. The total energy curve of the system shows both the melting transition in aluminum and phase transition from the body-centered cubic lattice to the face-centered cubic one at 1173 K. The binding energy for the Al atom in the lattice of the Fe crystal is smaller than that for Fe atoms. The calculated diffusion coefficients for Al and Fe have a significantly slower growth with a temperature in the range of 673 K ≤ T ≤1500 K. To describe the diffusion in a crystal using the molecular dynamics model, a temperature-dependent correction to the activation energy is calculated. The temperature dependence of the diffusion coefficient of aluminum atoms in an iron crystal can be represented as an Arrhenius expression with a temperature-dependent energy barrier for diffusion. © 2019, Institute for Metals Superplasticity Problems of Russian Academy of Sciences. All rights reserved

    Koranic Motifs and their Representation in «Imitations of the Koran» by A. S. Pushkin

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    В статье на материале «Подражаний Пушкину» А. Пушкина прослеживается использование коранических мотивов и реминисценций, рассматриваемых в контексте рецептивной эстетики художника, анализируется важность использования реминисценций Священного писания, выясняются особенности воплощения смыслов Корана в эстетическом наследии писателя. Методология анализа определяется теорией системно-концептуального подхода к изучаемому материалу, позволяющего рассматривать цикл А. Пушкина не просто как образец ориентального творчества поэта, а как явление, формирующее новый подход к решению данной темы.Based on A. Pushkin’s «Imitations of Pushkin», the article traces the use of the Koranic motifs and reminiscences, considered in the context of the artist's receptive aesthetics, analyzes the importance of using reminiscences of the Holy Scriptures, reveals the features of the embodiment of the meanings of the Koran in the writer's aesthetic heritage. The methodology of the analysis is determined by the theory of a system-conceptual approach to the material being studied, which makes it possible to consider A. Pushkin’s cycle not just as an example of the poet’s oriental creativity, but as a phenomenon that forms a new approach to solving this topic

    Socio-Cultural Potential of a scientific Library of Higher Education Institution in Students’ value Attitude to Education Development

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    © 2015 Canadian Center of Science and Education. All rights reserved. The article is aimed to identify social-cultural potential of a scientific library of higher education institution in students’ value attitude to education development, and also to reveal the content and technology of students’ involvement in its activity. With reference to the specified goals, the main approach to this issue research has been the social-cultural approach that determines the efficiency of applied problems solutions in the process of students’ value attitude to education development in the context of a scientific library of higher education institution. In the article there has been revealed the specifics of social-cultural activity of a scientific library aimed at the formation of students’ value attitude to education; there has been presented the complex of task-oriented and systematic pedagogical impacts on personality consciousness and behavior via involving tem in social-cultural forms of work of a scientific library in the process of which there takes place the development of students’ value attitude to education. Materials of this article can be useful for teachers to develop students’ value attitude not only to education but to scientific-research activity as well; to researchers who deal with the subject of personality value attitude development

    Profession-oriented pedagogic training for future teachers under conditions of network interaction with school

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    © 2015, Mediterranean Center of Social and Educational Research. All rights reserved. Activation person’s creative potential on the background of deepening democratization of social interaction is the brightest trend of society development in XXI century that stipulates transformation of practically all spheres of living environment and, above all, the sphere of education. Traditional approaches to education on every its level based on the priority of educational information transferring/uptake processes absolutely do not meet requests of intensively developing socium coming to collision with real demands of general educational services’ consumers. One of the important problems of pedagogic education in Russia is being insufficient practical training of future teachers for professional activity. In this connection the present article is dedicated to the problem of renewal of content of pedagogical training of future teacher of basic general school in accordance with new requirements to labour activity defined as Professional pedagogic standard and also to professional actions reflected in Federal state standard of general education. In the article there are model of substantial renewal of pedagogical cycle’s disciplines, improvement of their practical aspect on the basis of network interaction between educational organizations of general and higher education (school-university partnership). Authors suggest the content of “Disciplines of professional training” module and also give general trajectory for student’s actions aimed at its uptake. The represented model will be approbating in the Elabuga University of the Federal University of Kazan during 2015

    Modeling the UO2 reduction process

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    Methods of molecular dynamics and DFT calculations have been used to study the reduction mechanisms of UO2 as the most representative part of spent nuclear fuel to metallic uranium. It is shown that the critical softening of the combined modulus of elasticity C11-C12 to zero is the reason for the destruction of the UO2 crystal as a result of the removal of oxygen from it. This destruction is accompanied by an order-disorder phase transition in the oxygen subsystem of the crystal under consideration. DFT calculations indicate a continuous decrease in the band gap as oxygen is removed from the UO2 crystal. When the system reaches the composition U2O3, the band gap disappears and the system becomes electrically conductive. The appearance of the dielectric-conductor transition explains the realization of the FFC Cambridge process during the recovery of spent nuclear fuel. The passage of Li+ and Cl– ions of the LiCl melt through cylindrical channels in a UO2 crystal with cross-sectional radii from 0.25 up to 2 nm has been studied. The strength of the external electric field required for the passage of these channels decreases with an increase in the channel cross section, and the number of Cl– ions entering the channel increases. On the walls of the channels that pass ions with charges of both signs, colonies of adsorbed Cl– and Li+ atoms appear separated from each other, between which strong electric fields are formed. The existence of such fields can cause Li+ ions to move deep into the material being reduced.https://doi.org/10.15826/elmattech.2023.2.01

    Kinetic test of a doped silicene-graphite anode element in a computer experiment

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    The stability of the system "bi-layer silicene on the graphite substrate" is studied in the molecular dynamics simulation. Silicene sheets are doped with phosphorus, and graphite sheets are doped with nitrogen. Lithium ion moves along a silicene channel with a gap in the range of 0.6-0.8 nm. The time for the ion to pass the channel and leave it decreases with an increase in the channel gap. There is a tendency of the silicene sheets roughness growth with an increase in the gap between silicene sheets (except, 0.75 nm). Doping phosphorus and nitrogen atoms stabilize the silicene and graphite structure. © 2020 Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 16-13-00061The study is supported by the Russian Science Foundation (project no. 16-13-00061)

    Pedagogical bases of formation of key information technology competencies polytechnic institute graduates

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    © 2016, Econjournals. All rights reserved.The article based on the analysis of the literature and experience in the field of economic education is considered a system of key concepts on the topic, as well as features of the introduction of competence approach in teaching practice polytechnic institute, the problem of realization competence approach in higher education, the formation of key information technology competencies, ensuring high availability polytechnic institute graduates to solve problems in the practice of the specialty, modern requirements to the society and the state system of vocational education at all levels, the task of creating these pedagogical conditions, which would help improve the quality of training of future specialists. This article lists didactic, psycho-pedagogical, organizational and pedagogical conditions that are necessary to improve the level of information technology training of future specialists. Their implementation will create the necessary information technology economist competence
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