To ensure the progress of sustainable development and overcome threats to national security, the development of tools for balancing ecological, economic and energy aspects of economic activity acquires special importance. This study is related to the influence of choosing different functional elements of transport taxes on their effectiveness in ensuring national security. For calculations, panel regression modelling with panel-adjusted standard errors based on the use of the Durbin–Watson test using dummy variables was chosen. The assessment involves the selection of the main factor variable (tax revenues from transport taxes, as well as an additional dummy variable) and compliance with a country’s transport taxation system, with a certain criterion for its application. The resulting criterion was chosen as an integral indicator of national security, which summarizes the parameters of environmental footprints, economic growth, energy efficiency and security. Calculations were made for nine countries (i.e., the Czech Republic, Finland, France, Ireland, Israel, Portugal, Romania, Slovakia and Turkey) for the period 1996–2019. The calculations proved that the establishment of transport taxes, depending on the type and weight of the car, increases their effectiveness on ensuring national security or, depending on the cost and age of the car, weakens such effectiveness. The use of emissions generated by the car, its capacity and its type of fuel requires additional research; the obtained results did not allow for unambiguously determining their impact on the effectiveness of transport taxes. The conducted research forms the basis for choosing the optimal design of transport taxes to ensure the maximization of their regulatory effectiveness. The developed approach can be extended to evaluate the effectiveness of other environmental taxes.

Гетерометалевим комплексним сполукам притаманний напівпровідниковий тип провідності, інтервал робочих температур яких залежить від природи центральних атомів металів, місткових лігандів, стереохімії метал-лігандного оточення, і можуть бути використані як напівпровідниковий матеріал. Розроблена методика синтезу гетерометалевого µ-метоксо(купрум(ІІ), бісмут(ІІІ)) ацетилацетонату(І). Cинтезовано напівпровідниковий матеріал µ-метоксо(купрум(ІІ), бісмут(ІІІ)) ацетилацетонат, такого складу: Cu 3 Bi(AA) 4 (OCH 3) 5 , де HAA = H 3 C-C(O)-CH 2-C(O)-CH 3. Метою дослідження є дослідження впливу температури на фізичні параметри синтезованого напівпровідникового матеріалу. Проведено експериментальні вимірювання та теоретичні розрахунки залежностей основних фізичних параметрів цього матеріалу від температури та магнітного поля.

One of the three most important components of the effective work of an organization or enterprise in the energy sector is properly organized staff work. Thus, all the risks arising in this process should be given proper consideration. Conventional methods can hardly be of any assistance, which is why this paper proposes the innovative rapidly adaptive model for the evaluation of existing risks and the forecasting of emerging ones due to the COVID-19 pandemic in modern personnel management. The model employs a probability theory and applies it to four major risk groups, which are related to many factors. It also describes the methods of mitigating these risks. This made it possible to improve personnel management efficiency, thus offsetting the adverse consequences of the COVID-19 pandemic.

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