https://dspace.chmnu.edu.ua/jspui/handle/123456789/803 Thu, 16 Apr 2026 22:42:38 GMT 2026-04-16T22:42:38Z http://dspace.chmnu.edu.ua:80/jspui/retrieve/0918f5c2-c20f-4fbf-ba08-2f575d1934ca/БД.png https://dspace.chmnu.edu.ua/jspui/handle/123456789/803 https://dspace.chmnu.edu.ua/jspui/handle/123456789/3183 Title: Morphological changes in the extraorgan vascular bed of the pineal gland of rats under conditions of chronic stress Authors: Pshychenko, V. V.; Cherno, V. S.; Naidich, O. V.; Bondar, A. O.; Yulevych, O. I.; Ovcharenko, H. V. Abstract: Modern Ukrainian society has been in conditions of active military operations for several years, which have caused disruption of sleep patterns, lack of proper rest, and a sense of security, which has led to a state of chronic stress. The main role in protecting the body from stress factors, regulating sleep, and implementing adaptive reactions belongs to the pineal gland and the hormone it synthesizes – melatonin. However, prolonged exposure to stress factors leads to disruption of the functional activity of the pineal gland, which manifests itself not only at the cellular level but also in the state of the vascular bed. The aim of the work was to study morphological changes in the state of the extraorgan vascular bed and rheological properties of the pineal gland blood under conditions of chronic stress. The study was conducted on 12 adult white male Wistar line rats, which were divided into control and experimental groups. Animals in the control group were kept under normal vivarium conditions without the influence of additional factors. Animals in the experimental group were subjected to chronic stress by forced swimming for 60 minutes a day for 10 days. To study the state of the vascular bed of the pineal gland, morphological, morphometric, and statistical research methods were used. During the study, morphological manifestations of extraorgan blood circulation disorders in the pineal gland were detected, manifested by changes in the rheological properties of the blood and the restructuring of the walls of venous and arterial blood vessels. It was established that violations of the rheological properties of blood in venous vessels were manifested by blood separation, aggregation and lysis of erythrocytes and stasis, and in arterial vessels – by the practically absence of erythrocytes in the lumen of the vessels. Morphological changes in the state of the vascular wall in the veins were manifested by endothelial cell hypertrophy, stretching and thinning of the vascular wall, and its ruptures. In arterial type vessels, hypertrophy and edema of endothelial cells and spasm of muscle cell membranes were detected. Thus, the detected morphological changes indicate impaired blood circulation and slowing of blood flow, which leads to hypoxia of the pineal gland parenchyma. Description: Pshychenko, V. V., Cherno, V. S., Naidich, O. V., Bondar, A. O., Yulevych O. І., & Ovcharenko, H. V. (2026). Morphological changes in the extraorgan vascular bed of the pineal gland of rats under conditions of chronic stress. Reports of Morphology, 32 (1), 64–70. DOI : 10.31393/morphology-journal-2026-32(1)-09 Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3183 2026-01-01T00:00:00Z https://dspace.chmnu.edu.ua/jspui/handle/123456789/3182 Title: International legal mechanisms for ensuring public security and protecting public order under martial law Authors: Zakharchenko, A.; Varenyk, O.; Pidbereznykh, I.; Vykhrystiuk, A.; Verbytsky, V. Abstract: This study examines international legal mechanisms for ensuring public security and protecting public order during the implementation of martial law. The relevance of the research arises from the increasing frequency of emergency regimes in contemporary geopolitical conflicts and the need to balance state security measures with international human rights obligations. The purpose of the study is to analyse how international legal instruments influence the regulation of public security and law enforcement activities under martial law in different jurisdictions. The research applies a comparative legal approach combined with case study analysis and the examination of statistical indicators of crime rates and public order violations. The empirical scope includes Ukraine, Turkey, Thailand, Pakistan, and the Philippines, which represent diverse geopolitical and legal contexts of martial law implementation. The findings indicate that the introduction of martial law is often associated with changes in crime rates and public order violations; however, these dynamics vary significantly depending on institutional capacity, duration of emergency measures, and the level of political conflict. The analysis demonstrates that international legal frameworks, including human rights conventions and international humanitarian law, provide normative safeguards, yet their practical implementation remains uneven across national systems. The study highlights the importance of strengthening judicial oversight, improving coordination between civilian and military authorities, and harmonizing national legislation with international legal standards. These findings contribute to the development of more effective legal mechanisms for maintaining public security during emergency regimes while safeguarding fundamental rights. Description: Zakharchenko, A., Varenyk, O., Pidbereznykh, I., Vykhrystiuk, A., & Verbytsky, V. (2026). International legal mechanisms for ensuring public security and protecting public order under martial law. Cadernos de Dereito Actual. Vol. 2026 (31), 373–390. Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3182 2026-01-01T00:00:00Z https://dspace.chmnu.edu.ua/jspui/handle/123456789/3181 Title: Development of a Model for Integrating Modern Technologies into Public Education Governance in Ukraine Authors: Tiurina, D.; Kovtun, I.; Pidlisna, T.; Shtyrov, O.; Shabanov, D. Abstract: The digitalization of public education management has become a key factor in increasing the efficiency, transparency and accountability of educational systems in the world, which is especially important for Ukraine in the context of decentralization and integration into the European educational space. The introduction of information technology in the field of education management requires not only technical upgrades but also a rethinking of management models, competencies, and decision-making mechanisms. The purpose of the study is to study the trends of digital transformation of public education management and identify factors that affect the efficiency of digital management processes. The research methodology is based on quantitative methods, including a survey of heads of educational institutions and representatives of local authorities, including a questionnaire survey of heads of educational institutions and representatives of local authorities, as well as analysis of statistical and analytical data from international organizations (OECD, UNESCO UIS). The results obtained showed a steady increase in the index of digital accessibility of education (by an average of 18% annually), the expansion of e-government and the improvement of digital competence of managers. It is established that the effectiveness of digital reforms directly depends on the level of digital culture, leadership and ethical responsibility of managers. Based on the data obtained, a multi-level model of integration of information technology into the system of public education management is proposed, which covers the strategic, analytical, operational and communication levels. The practical significance of the study lies in the possibility of using this model to optimize management decisions, develop managerial training programs and create sustainable digital ecosystems in the field of education. The results are of practical importance for the formation of state policy on digital education management, as well as for harmonization of Ukrainian approaches with European standards of smart governance. Description: Tiurina, D., Kovtun, I., Pidlisna, T., Shtyrov, O., & Shabanov, D. (2026). Development of a Model for Integrating Modern Technologies into Public Education Governance in Ukraine = Розробка моделі інтеграції сучасних технологій в управлінні державною освітою в Україні. Journal of Education and Training Studies, Vol. 14, (2), 71–83. DOI : 10.11114/jets.v14i2.8273 Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3181 2026-01-01T00:00:00Z https://dspace.chmnu.edu.ua/jspui/handle/123456789/3153 Title: Qubit Decoherence : Symbolic Modeling, Visualization, and Analysis with Maple Authors: Chuiko, G.; Darnapuk, Y. Abstract: In quantum computing, maintaining coherence in qubits is a persistent challenge - particularly due to dephasing noise, which causes gradual information loss without energy dissipation. This paper investigates how such decoherence processes affect pure quantum states by using symbolic modeling in Maple. Through the Kraus operator formalism, we simulate how the state’s density matrix evolves under varying noise levels and visualize these changes on the Bloch sphere. Our results show that qubits near the equator of the Bloch sphere are significantly more vulnerable to dephasing, which has clear implications for circuits that rely on superposition states, such as those produced by Hadamard gates. We also compute fidelity and norm degradation analytically, highlighting the noise thresholds where quantum error correction becomes essential. These findings not only illustrate the selective nature of decoherence but also support a more tailored design of fault-tolerant quantum algorithms and communication protocols. Description: Chuiko, G. & Darnapuk, Y. (2025). Qubit Decoherence : Symbolic Modeling, Visualization, and Analysis with Maple. IEEE 13th International Conference on Intelligent Data Acquisition and Advanced Computing Systems : Technology and Applications (IDAACS), 4–6 September 2025, Gliwice, Poland, 679–682, DOI: 10.1109/IDAACS68557.2025.11322077. Wed, 01 Jan 2025 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3153 2025-01-01T00:00:00Z