Browsing by Author "Shevchenko, Olena"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Features of the Swelling Kinetics of Polymer Materials in Blended Diesel Fuel
    (Lviv Polytechnic National University, Lviv, 2024) Shevchenko, Olena; Popytailenko, Daryna; Ebich, Yurii; Zamikula, Kostiantyn; Sukhyi, Kostiantyn M.; Vytrykush, Nataliya
    ENG: The work is devoted to determining the features of the swelling kinetic patterns of polymer materials in contact with blended fuel containing fatty acid esters. Kinetic equations for predicting the behavior of polymer materials in contact with blended fuel at different temperatures were obtained. Peculiarities of the swelling kinetics of polymer materials with different chemical structures in blended diesel fuel were studied. It was found that the process proceeds in two stages for any temperature conditions. The effect of fatty acid esters in the composition of blended diesel fuel on the stability of polymer materials depending on their structure and temperature factor was determined. An approach to the selection of polymer materials resistant to the effects of fatty acid esters is proposed. The patterns of changes in the swelling resistance of polymer materials upon contact with blended diesel fuel, depending on their structure, were determined.
  • Thumbnail Image
    Item
    Organisational and Management Design of Financial and Human Resource Support for Innovative Agribusiness: The Security
    (Vytautas Magnus University Agriculture Academy, Lithuania, 2023) Popovychenko, Hanna; Mishchenko, Maksym I.; Bieliaiov, Taliat; Shevchenko, Olena; Orlova-Kurilova, Olga; Guliaieva, Natalia; Vlasiuk, Tetiana
    ENG: The article considers the specifics of the organisational and managerial design of financial and human resource support of innovative agribusiness. It is established that the scientific literature does not sufficiently cover this issue. The tools, methods, principles and models of such design need to be clarified. It is emphasised that the forecasting of the level of security of financial and human resources in the organisation is an important aspect of strategic management, risk diversification and socio-economic development of both a single subject of entrepreneurial activity and the state as a whole. It is proposed to carry out the above forecasting using a combination of quantitative forecasting methods. The results of forecasting the security level of organisational and managerial design of financial and human resources of innovative agribusiness obtained in the article showed almost positive dynamics of the phenomenon under study, but we should not expect stability and permanence of this trend due to significant fluctuations in the external environment.