Electronic and Magnetic Properties of the 8-ZGNR/h-BN(0001) Interface

The results of a density functional theory investigations of structural and electronic properties of zig-zag graphene nanoribbons 8-ZGNR/ h-BN(0001) are presented. The peculiarities of the spin state at the Fermi level and the role of the edge effect and the effect of substrate in formation of the band gap (380 meV) in 8-ZGNR/h-BN(0001) system were determined. The contributions of nanoribbon edges and the substrate in formation of the gap have been differentiated. The estimations of local magnetic moments on carbon atoms of the 8-ZGNR nanoribbon are made. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3524

Phisical model wear resistance of metal matrix composite materials

It is given to the method calculation of wear resistance of WC, phase Laves, superstructure and composite materials on their basis. Received results are discussed

Ti L-Spectrum XANES and Electron Structure of the System Ti-Al-C

The electron structure and Ti L -absorption edge in the system Ti-Al-C have been studied theoretically using the local coherent potential method of the multiple scattering theory. The alculated local partial electron density of states of Ti made it possible to study the influence of Al on the electron structure of this material and its Ti L-absorption spectrum. It was shown that in the ternary system comparing with the binary titanium carbide the first maximum of the titanium unoccupied d-states nearly disappeared and the intensity of the second one fell more than twice. These calculations are in a good correspondence with the experimental Ti L-spectra and indicate that the contribution of Ti s-states to XANES can be neglected

Trans-perspective technologies in the formation of the vocational and educational space of students

Digital economy in professional standards sets high requirements for the competencies of specialists, necessity of acceleration and continuation of professional development, introduction of modes of distance learning. Students have contradictions and chronological gaps between the new virtual educational content and previously obtained real experience, modern styles of professional activity and traditional patterns of performance of labor functions, between current information from Internet sources and well-known fundamental knowledge in the subject area. As a result, it becomes difficult to implement educational strategies and trajectories, as well as to develop professional competencies. To solve this problem, it is suggested to distinguish a class of trans-perspective pedagogical technologies. Their pedagogical impact is based on the creation of spatial and temporal relationships (trans-perspectives) between various educationally significant events. The trans-perspective reverse-methodologies identified by the authors have these opportunities and are based on case studies, professionally-oriented complex projects, end-to-end design based on reverse-engineering and prototyping, the “Swing of Time” methodology based on visualization. Diagnostics of the results of the experiment with students of various training areas proves an increase in the level of formation of the continuous professional and educational space of the student due to the reduction of educational risks and the creation of a professional and educational trans-perspective as a purposeful combination of the multidimensional experience of the past, knowledge of the present and forecasts of the future in the educational process