Видання зареєстровані авторами шляхом самоархівування
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Item Magneto-optical properties of two – layer film systems based on Fe and Pt(Vasyl Stefanyk Precarpathian National University, 2021) Бездідько, Олександр Валерійович; Бездидько, Александр Валерьевич; Bezdidko, Oleksandr Valeriiovych; Шкурдода, Юрій Олексійович; Шкурдода, Юрий Алексеевич; Shkurdoda, Yurii Oleksiiovych; Ващенко, Світлана Михайлівна; Ващенко, Светлана Михайловна; Vashchenko, Svitlana MykhailivnaThe paper shows the experimental results of the study of magneto - optical properties and phase composition of thin films and multilayers based on Fe and Pt. Samples were obtained in a high-vacuum chamber (10–8 Pa) by layer-by-layer deposition from pots at room temperature. It has been shown that FCC solid solution of FePt is formed already in the process of deposition on the substrate (sital plates). Depending on the concentration of the atoms of the components in the unannealed samples, three phases can be formed: (i) s.s. Fe(Pt); (ii) Fe3Pt; (iii) FePt. The first sign of the beginning of ordering in the FCC phase of FePt should be considered the appearance of superreflections in the form of lines (001) and (002) during heat treatment. Depending on the total thickness of the multilayer or individual layers, the annealing temperature at which extrareflexes appear can vary in the range of 300–570 K. All the samples obtained have a low coercivity (0.25 - 0.4 mT). Magneto-optical studies have shown that an increase in the content of the non-magnetic component decreases the main magnetic characteristics. However, In [Fe(3)/Pt(3)]n/S multilayers with the number of repeatable elements from 2 to 8 an increase in the main magnetic parameters is observed compared with bilayer films at the same effective thickness.Item Modeling business process of labor intensity calculating the machine-building equipment’s production(Sumy State University, 2017) Яценко, Валерій Валерійович; Яценко, Валерий Валерьевич; Yatsenko, Valerii Valeriiovych; Ващенко, Світлана Михайлівна; Ващенко, Светлана Михайловна; Vashchenko, Svitlana Mykhailivna; Парфененко, Юлія Вікторівна; Парфененко, Юлия Викторовна; Parfenenko, Yuliia ViktorivnaThe main aim of this article is the solution of actual reengineering business process problem of labor intensity calculation, which is carried out at the JSC Nasosenergomash enterprise. The model of the existing process is formed in this work, which analysis allow to identify factors that reduce the effectiveness of the calculation. As a result of the research was formed a renewed model of the updated business process, without revealed faults. The technology, which will allow the reengineering business process is proposed and will lead it to the new model.Item Information System of Test Monitoring of Students' Knowledge(Sumy State University, 2016) Ващенко, Світлана Михайлівна; Ващенко, Светлана Михайловна; Vashchenko, Svitlana Mykhailivna; Sobol, A.V.The work is dedicated to the improvement of the test control technology of mastering the educational material by the students. To achieve this the information system of tests formation has been worked out. The increasing of the variability of tasks is provided by the use of linear congruent method of pseudo-random numbers generating.Item Information expert support system for fixture design(Sumy State University, 2014) Ващенко, Світлана Михайлівна; Ващенко, Светлана Михайловна; Vashchenko, Svitlana Mykhailivna; Іванов, Віталій Олександрович; Иванов, Виталий Александрович; Ivanov, Vitalii Oleksandrovych; Bagriy, Y.V.; Shishka, O.O.Fixture design plays quite an important role in the production of the high quality and competitive production items, especially in the multiproduct manufacturing. The latter requires expedient retooling in terms of other parts machining. The necessity of implementation of computer-aided technologies particularly computer-aided fixture design (CAFD) is connected with the considerable labor content of the technological design as well as some optimization tasks.