https://dspace.chmnu.edu.ua/jspui/handle/123456789/814 Sun, 23 Aug 2026 06:43:52 GMT 2026-08-23T06:43:52Z http://dspace.chmnu.edu.ua:80/jspui/retrieve/961f5ea8-80a7-48b1-b0cc-e48ab2f792da/images.jpg https://dspace.chmnu.edu.ua/jspui/handle/123456789/814 https://dspace.chmnu.edu.ua/jspui/handle/123456789/3324 Title: Econometric Assessment of the Effectiveness of Administrative and Legal Principles for the Formation of Sustainable Regional Development in the Context of Ensuring National Security Authors: Dragan, I.; Harasym, P.; Blok, N.; Andrusіak, I.; Sichko, D. Abstract: The article proposes an econometric approach to assessing the effectiveness of administrative and legal principles for the formation of sustainable regional development in the context of ensuring national security. It is substantiated that the sustainability of regional development depends not only on economic, investment and social parameters, but also on the quality of regulatory and program support, implementation of regional programs, transparency of management and the ability of authorities to respond to security threats. The methodological basis of the study is a combination of index modeling, min– max normalization, entropy weighting, panel regression and frontier efficiency assessment. Within the framework of the proposed model, an index of administrative and legal capacity, an index of sustainable regional development, an index of security vulnerability and a security-adjusted index of sustainable development have been formed. This approach allows not only to compare regions by level of development, but also to determine how effectively administrative and legal potential is transformed into actual results of sustainable development. The scientific novelty lies in the construction of an integrated model that quantitatively combines legal, administrative, socio-economic and security parameters of regional development. The practical significance of the results lies in the possibility of using the model for monitoring regional policy, assessing the implementation of development programs and forming priorities for security-oriented management. Description: Dragan, I., Harasym, P., Blok, N., Andrusіak, I., & Sichko, D. (2026). Econometric Assessment of the Effectiveness of Administrative and Legal Principles for the Formation of Sustainable Regional Development in the Context of Ensuring National Security. Mathematical Modeling and Computing, 13, (2), 686–695. DOI : 10.23939/mmc2026.02.686 Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3324 2026-01-01T00:00:00Z https://dspace.chmnu.edu.ua/jspui/handle/123456789/3323 Title: Devising a method for determining the length of a series of artillery fire based on probability-analytical modeling and fuzzy multi-criterion evaluation Authors: Maksymov, M.; Kozlov, O.; Maksymov, O.; Riaboshapka, R. Abstract: This study investigates artillery fire control processes under conditions of uncertain disturbances when using the "shoot- and-scoot" tactic. The task addressed is to increase the efficiency of artillery fire and reduce the time for performing fire tasks by optimally choosing the number of shots in a series. To assess the efficiency of firing, the time for performing tasks, and the risk of hitting an artillery installation for different values of the length of the firing series, probabilistic-analytical modeling methods have been used. To select the best solution according to a set of contradictory criteria, a fuzzy logic apparatus was applied, which makes it possible to formalize the decision-making process under conditions of uncertainty. A method for determining the rational length of firing series has been devised, which involves the formation of a generalized criterion, the search for a set of local maxima, and their further evaluation using a fuzzy model. The proposed approach makes it possible to take into account the influence of random disturbances, in particular, a possible sudden increase in barrel wear during firing series. The results of computational experiments have confirmed the effectiveness of the proposed method. It was found that the firing efficiency increased by 11.6–20.8% compared to the fixed-length firing series approach, as well as the reduction in the time to complete firing tasks by up to 31.6%. In addition, in most cases, a decrease in the total time spent by installations at firing positions was observed, which indicates a decrease in the risk of damage by counter-battery means. The devised method could be applied in control systems for modern artillery installations to increase the effectiveness of their combat use under conditions of uncertainty. Description: Maksymov, M., Kozlov, O., Maksymov, O., & Riaboshapka, R. (2026). Devising a method for determining the length of a series of artillery fire based on probability-analytical modeling and fuzzy multi-criterion evaluation. Eastern-European Journal of Enterprise Technologies, 3 (3 (141), 97–110. DOI : 10.15587/1729-4061.2026.361486 Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3323 2026-01-01T00:00:00Z https://dspace.chmnu.edu.ua/jspui/handle/123456789/3322 Title: CPEC Sustainable Development Project: Prospects and Challenges for Gilgit-Baltistan’s Tourism Industry Authors: Ismail, M.; Tykhonenko, I.; Noor, F. Abstract: The research makes an attempt to analyze China-Pakistan Economic Corridor (CPEC) Sustainable Development Project which offers both opportunities and challenges for the tourism industry in Gilgit-Baltistan. The study used H. R. Sontag’s Dependence theory, which allows to examine how Chinese investment and economic dependence affect the resilience and sustainable development of the country’s tourism sector. The research makes a conclusion that the implementation of a sustainable development project within the framework of the CPEC for the Gilgil-Baltistan region and its tourism sector potentially will have the following consequences. In a positive format: economic growth, improved interaction between the population, development of infrastructure and logistics routes and regional development in general, creation of new jobs, promotion and marketing. The challenges in this case are security, cultural, religious issues and threats to the ecology and environment. The methodological basis of the study is using systematic and statistical methods (sampling method). The comparative analysis of tourist flows based on open data from Pakistani government agencies were made. Secondly, sociological polls were conducted at the Karakoram International University and the stakeholder on the public perception of the impact of the CPEC on the development of the region’s tourism industry . Description: Ismail, M., Tykhonenko, I., & Noor, F. (2026) CPEC Sustainable Development Project: Prospects and Challenges for Gilgit-Baltistan’s Tourism Industry. FWU Journal of Social Sciences, 20 (2), 149–163. DOI: 10.51709/19951272/Summer2026/11 Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3322 2026-01-01T00:00:00Z https://dspace.chmnu.edu.ua/jspui/handle/123456789/3321 Title: Effect of the polymer network on the diffusion of foreign particles in hydrogels Authors: Dinzhos, R. et al. Abstract: In the present work, we introduce a physical model of foreign particle diffusion in polymer hydrogels that accounts for the network architecture of these systems. The model employs a classical diffusion theory framework in condensed media to derive a theoretical dependence of the diffusion coefficient on the volume occupied by the hydrogel’s network. We demonstrate that the changes in the diffusion of foreign particles can be attributed to the changes in the free activation energy due to the presence of the polymer network. Using optical image analysis, we obtained the dependence of the diffusion coefficient in agarose and gelatine hydrogels on the concentration of the gelling agent. The experimental data obtained are in good agreement with the theoretical dependences predicted by the proposed physical model. Furthermore, when the size of the diffusing particles is much smaller than the hydrogel pore size, the diffusion coefficient appears to be independent of the nature of the hydrogel and determined solely by the gelling agent concentration. Description: Zabashta, Y., Lazarenko, Y., Alekseev, O., Vergun, L., Hnatiuk, K., Andrusenko, & Lazarenko, M. (2026). Effect of the polymer network on the diffusion of foreign particles in hydrogels = Вплив каркаса на дифузію сторонніх частинок у полімерних гідрогелях. Bulletin of the Taras Shevchenko National University of Kyiv. Physics and Mathematics, 82 (1), 285–292. DOI: 10.17721/1812-5409.2026/1.37 Thu, 01 Jan 2026 00:00:00 GMT https://dspace.chmnu.edu.ua/jspui/handle/123456789/3321 2026-01-01T00:00:00Z