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    Wyświetlanie 1-9 z 9
    Tytuł:
    Research into morphology and phase structure in the surface of Al-Si alloy modified by yttrium oxide
    Autorzy:
    Zagulyaev, D.
    Konovalov, S.
    Gromov, V.
    Melnikov, A.
    Shlyarov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/201477.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silumin
    microstructure
    electroexplosive alloying
    yttrium oxide
    mikrostruktura
    tlenek itru
    Opis:
    Using methods of physical material studies (scanning electron microscopy and micro X-ray spectral analysis), a study was carried out with focus on alteration of structure and phase composition in surface layers of Al-Si alloy (silumin АК10М2N) treated in electroexplosive alloying with a multiphase plasma jet formed in the process of aluminum foil explosion and carrying particles of Y2O3 weighted powder portion. It was revealed that a porous surface layer with non-homogeneously distributed alloying elements (silicon, yttrium) in it is formed in any conditions of electroexplosive alloying of silumin. Thickness of the modified layer is different, varying 50 to 160 μm, depending on the zone to be examined. The modified surface consists basically of Al, Si and Y. Yttrium in the modified layer is thought to be an indirect evidence of better physical and mechanical properties of the surface layer in comparison with the base material.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 173-177
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dispersion of Al-Si Alloy Structure by Intensive Pulsed Electron Beam
    Autorzy:
    Konovalov, S.
    Gromov, V.
    Zaguliyaev, D.
    Ivanov, Y.
    Semin, A.
    Rubannikova, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381713.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    silumin
    structure Al-Si
    electron beam processing
    crystallization cells
    dispersion
    struktura Al-Si
    obróbka wiązką elektronową
    krystalizacja
    dyspersja
    Opis:
    By the method of modern physical material science (optic microscopy scanning and transmission electron microscopy) the analysis of structural phase states, the morphology of the second phase inclusions and defect substructure of Al-Si alloy (silumin) of hypoeutectic composition, subjected to electron beam processing was done with the following parameters: energy density 25-35 J/cm2, beam length 150 μs, pulse number – 3, pulse repetition rate – 0.3 Hz, pressure of residual gas (argon) 0.02 Pa. The surface irradiation results in the melting of the surface layer, the dissolution of boundary inclusions, the stricture formation of high speed cellular crystallization of submicron sizes, the repeated precipitation of the second phase nanodimentional particles. With the increased distance from the irradiation surface the layer containing the second phase inclusions of quasi-equilibrium shape along with the crystallization cells was revealed. It is indicative of the processes of Al-Si alloy structure globalization on electron beam processing.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 79-84
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods of Forming the Future Designers’ Readiness for Professional and Scientific Research Activities
    Autorzy:
    Kolomiiets, Alla M.
    Shwets, Olena A.
    Gromov, Ievgen V.
    Kolomiiets, Dmytro I.
    Kozak, Tetiana S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2057072.pdf
    Data publikacji:
    2022-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    design activity
    designer-researcher
    future designers’ training
    innovations in design education
    professional training
    readiness for scientific research activity
    Opis:
    The authors state that the rapid penetration of design into every field of human life, the convergence of material production with art, the development of design technologies, and increasing the social impact of design have significantly heightened professional requirements for modern designers. However, the modern system of design education does not prepare students for the challenges they will face in the nearest future. The methodological approaches necessary for improving future designers’ professional training quality are determined. The empirical investigations on the future designers’ readiness for professional and scientific research activities are analysed. Methods of boosting the future designers’ ability to carry out scientific research and organising professional design activities are offered.
    Źródło:
    The New Educational Review; 2022, 68; 48-59
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Work with Foreign Scientific Editions as an Effective Factor in Motivating Undergraduates to Improve their Foreign Language Competency
    Autorzy:
    Kolomiiets, Alla M.
    Gromov, Ievgen V.
    Kolomiiets, Lesia I.
    Mazaikina, Iryne O.
    Kolomiiets, Dmytro I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963542.pdf
    Data publikacji:
    2020-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    internationalization of education
    foreign scientific information
    netnographic analysis
    motivational factors
    undergraduates
    increase of foreign language competency
    future teachers
    scientific publications
    Opis:
    The article is devoted to the problem of increase of the pedagogical universities undergraduates’ motivation to develop their foreign language competency. The main reasons necessitating continuous increase of the foreign language competence level have been determined. Utilizing such research methods as the focus group survey, theoretical generalization, comparison and pedagogical experiment, it has been proved that the maximum inclusion of students in foreign language activities with professional scientific information is an effective factor in increasing the professional orientation of the foreign languages learning by the future teachers. This type of work in the process of studying various academic disciplines provides a positive dynamics of the motivation components and readiness of the future teachers to work with scientific foreign-language information. It has been shown that netnographic analysis of the foreign-language scientific publications is also an effective factor in personal and professional development, socio-cultural communication, and the students’ mobility in professional and academic environment.
    Źródło:
    The New Educational Review; 2020, 60; 96-107
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approbation of Emergency Education Strategies for Internally Displaced Ukrainian Children under the Martial Law Conditions
    Autorzy:
    Kolomiiets, Alla M.
    Gromov, Ievgen V.
    Brovchak, Liudmyla S.
    Babchuk, Yuriy M.
    Tertychna, Taisiia D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2233949.pdf
    Data publikacji:
    2023-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    emergency education
    emergency
    internally displaced person
    martial
    law
    psychosocial intervention
    recreational therapy
    Opis:
    The study aimed to test the first two stages of the simplified model of emergency education (elaborated by P. Aguilar, G. Retamal, and K. Triplehorn) under martial law conditions on the relatively safe territory of Ukraine. The study embraced 52 children from internally displaced families, 6 teachers, 3 practical psychologists and 12 pedagogical university students. Work with children was organised by students’ self-government members under the guidance of pedagogical teachers and professional psychologists. Based on the emergency education model, the authors developed a method of organising recreational therapy for internally displaced school-aged children evacuated from war zones. In order to assess the effectiveness of the organised activities, the «Test of differential self-assessment of functional state» was used to determine the level of children’s indices of well-feeling, activity and mood (WAM-questionnaire). The results of the surveys before and after the experiment showed that the developed method of organising the recreational therapy of internally displaced children contributed to significant positive changes in their emotional, psychological and functional state. The reported redistribution of indices clearly illustrates the significance of those changes.
    Źródło:
    The New Educational Review; 2023, 72; 49-65
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    University Degree and Citizen Science: The Necessity for Promotion of the Latter and the Possibilities of Its Organization in the Teachers’ Professional Training
    Autorzy:
    Kolomiiets, Alla M.
    Gromov, Ievgen V.
    Kolomiiets, Dmytro I.
    Suprun, Maya V.
    Knysh, Tetiana V.
    Hnatiuk, Natalia Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964266.pdf
    Data publikacji:
    2021-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    citizen science
    future teacher
    personal qualities of a scientist
    teacher-researcher
    scientific research activity
    Opis:
    The article reveals the opportunities, types of organization and ways to use the citizen science results at the Pedagogical University. It’s been proved that future teachers of different specialties have certain personal qualities that affect their training for scientific research activity. These qualities differ significantly. All in all, the average values of personal qualities indicators point out that future teachers can be quite successful in certain types of scientific research activities, considering their strong personal characteristics and improving the weak ones. It is proved that if the pedagogical university organizes the participation of students in citizen science, then they better develop the skills of self-organization and other personal qualities, essential for a modern teacher-researcher.
    Źródło:
    The New Educational Review; 2021, 64; 175-187
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic sensing of hydrodynamic vortex flow
    Autorzy:
    Ezersky, A.
    Gromov, P.
    Soustov, P.
    Chernov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/332751.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    We report the results of experiments of sound scattering by a vortex flow formed behind a grid of vertical cylinders placed in an air flow. The experiments were carried out in a low turbulence wind tunnel at a low Reynolds number. The vortex flow was formed behind a grid of 3-10 of hollow cylinders with the d=2 mm and length 30 mm. During the experiments we could change the gap between the cylinders g=L/d (where L is a distance between the cylinders surfaces) from 3 to 5. The experiments showed that at a certain value of g vortex flows behind different cylinders could synchronize and this effect could be easily detected by means of distant acoustic sensing. This result was also confirmed by means of direct measurements of velocity field of the vortex flow.
    Źródło:
    Hydroacoustics; 2005, 8; 47-52
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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