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Sustainable Development Management of Regional Hospitality Industry: Synergy of Economic Policy and Local Strategies

2026-01-01T00:00:00Z

Назва: Sustainable Development Management of Regional Hospitality Industry: Synergy of Economic Policy and Local Strategies Автори: Гарбар, Галина Анатоліївна; Harbar, Halina; Банєва, Ірина Олексіївна; Baneva, Irina; Іваненко, Тетяна Яківна; Ivanenko, Tetyana; Кушнірук, Віктор Степанович; Kushniruk, Viktor; Павлюк, Світлана Іванівна; Pavliuk, Svitlana Короткий огляд (реферат): The aim of the study was to identify the patterns of interrelation between economic policy, local development strategies of tourism and the hotel industry of the Southern region of Ukraine, in particular Odesa and Mykolaiv regions, in the context of ensuring sustainable development and increasing the competitiveness of the hospitality industry. The methodology was based on a combination of analysis of official statistical data, macroeconomic indicators, and practical case studies of tourism enterprises' operations. As a result of the study, a number of quantitative indicators were obtained that reflect the dynamics of the hospitality sector in 2020-2024. Thus, the number of hotel visitors in Mykolaiv region decreased from 42.1 thousand people in 2020 to 15.4 thousand in 2022; however, in 2024 the indicator recovered to 28.7 thousand, indicating a gradual recovery of tourist flows. At the same time, the revenues of the hotel and restaurant sector in the region fell by more than 40% in 2020-2022, and tax revenues decreased from UAH 18.2 million in 2020 to UAH 7.6 million in 2022, with a subsequent partial recovery to UAH 12.4 million in 2024. A more stable dynamic was recorded for Odesa region: in 2023, hotels in the region served about 280 thousand tourists, and total revenues exceeded UAH 1.1 billion, showing a 15% increase compared to 2022. The average profitability level of hospitality enterprises in Odesa ranged from 12% to 14%, while in Mykolaiv it remained at 7% to 9%, reflecting regional asymmetry of development. The results obtained summarise the development trends of the hospitality industry and have practical significance for formulating recommendations to optimise the management of the tourism sector of the Southern region to ensure sustainable growth and preserve its cultural and environmental

Numerical and Experimental Analysis of Free Vibrations of Thick-Walled Cylindrical Shell

2026-01-01T00:00:00Z

Назва: Numerical and Experimental Analysis of Free Vibrations of Thick-Walled Cylindrical Shell Автори: Grigorenko, Alexander; Müller, Wolfgang; Borysenko, Maksym; Бойчук, Олена Володимирівна; Boychuk, Olena Короткий огляд (реферат): Free vibrations of an isotropic thick-walled circular cylindrical shell with one end rigidly clamped, and the other free, are investigated numerically and experimentally. The natural frequencies and corresponding mode shapes are determined using the finite element method within a three-dimensional elasticity formulation, employing solid finite elements. The article focuses on constructing a reliable finite element model, including selecting element types and mesh density based on accuracy, convergence, and computational efficiency. In the article, solve a test problem to verify the numerical model and present a detailed convergence analysis. An experimental study of free vibrations based on stroboscopic interferometry, which allows full-field visualization of vibration mode shapes and determination of natural frequencies with sufficient accuracy. A comparison between numerical and experimental results demonstrates good agreement, confirming the reliability of the proposed modeling approach. The research study has been used in the design and analysis of thick-walled cylindrical shell structures in engineering applications, as well as for validating numerical and analytical methods for the vibration analysis of shell systems.

Methodology for investigating the interference immunity of satellite navigation antenna arrays using ansys hfss

2026-01-01T00:00:00Z

Назва: Methodology for investigating the interference immunity of satellite navigation antenna arrays using ansys hfss Автори: Slyusar, Vadym; Атаманюк, Ігор Петрович; Atamanyuk, Igor; Sliusar, Ihor; Shelemin, Zakhar; Sidenko, Ievgen; Kondratenko, Yuriy Короткий огляд (реферат): This paper presents an HFSS-based procedure for quantifying the interference resilience of satellite-navigation antennas on autonomous platforms that employ digital antenna arrays and controlled reception pattern antennas (CRPAs). An individual element is first simulated to determine the operating band under the VSWR<2 criterion and to select the analysis frequency. The complete array is then solved with in-phase excitation to obtain the zenith peak gain P. Next, a phase distribution that enforces a zenith null is identified, the associated gain depression D is measured, and interference suppression is expressed as P−D. The workflow is demonstrated on navigation CRPAs of several topologies. A six-element ring yields a relative null depth of about 36.5 dB, whereas a seven-element ring provides up to 45 dB of suppression. The strongest performance is achieved by a dual-ring 16-element array, reaching a 53 dB null depth. A square 4×4 array is lower by 8.5 dB. In further research, it would be advisable to experimentally test the influence of phase errors and also to extend this approach to other electromagnetic simulators.

Business Models of Hospitality Industry Enterprises: Economic and Managerial Aspect

2026-01-01T00:00:00Z

Назва: Business Models of Hospitality Industry Enterprises: Economic and Managerial Aspect Автори: Банєва, Ірина Олексіївна; Baneva, Irina; Іваненко, Тетяна Яківна; Ivanenko, Tetyana; Павлюк, Світлана Іванівна; Pavliuk, Svitlana; Кушнірук, Віктор Степанович; Kushniruk, Viktor; Гарбар, Галина Анатоліївна; Harbar, Halina Короткий огляд (реферат): The study examines the transformation of business models in the hospitality industry in response to digital technologies, platform integration, and changes in consumer behaviour. To identify patterns in business model development and to develop a methodological approach for assessing their effectiveness based on digital maturity and managerial factors. Design/Methodology/Approach: The article combined elements of a systematic review with empirical research, thereby developing a comprehensive analytical framework for evaluating the effectiveness of business models in the hospitality industry, incorporating digital, financial, and behavioural metrics. The research is based on a combination of statistical analysis and economic-mathematical modelling. The empirical dataset includes 42 hospitality enterprises over the period 2021–2025. Indicators were normalised using min-max transformation, and integral indices of digital maturity and business model effectiveness were constructed through weighted aggregation. The relationships between variables were estimated using multiple regression analysis with control variables (enterprise size, occupancy rate, cost structure, and OTA share). Model validity was tested using R², F-statistics, Durbin–Watson test, and multicollinearity diagnostics. Research Limitation: The study is limited by the sample size and the focus on retrospective data from 2021–2025, which may restrict generalisation to other regions or future market conditions. Findings: The results reveal a strong and statistically significant positive relationship between digital maturity and business model effectiveness. The regression model explains 73% of the variance in performance, confirming the dominant role of digital factors compared to traditional operational parameters. A 0.1-point increase in digital maturity leads to measurable improvements in performance indicators. Businesses with higher digital integration demonstrate increased profitability, higher conversion rates, and improved customer lifetime value. At the same time, growing dependence on platform channels affects revenue structure and margins. Practical Implication: The proposed integrated evaluation model can be used by hospitality enterprises to optimise business models, improve management decisions, and enhance digital transformation strategies. It provides a tool for balancing platform dependence, operational efficiency, and customer-oriented innovation. Social Implication: The development of digitally integrated and adaptive business models enhances service quality, accessibility, and sustainability in the hospitality sector, thereby supporting broader economic development and consumer welfare. Originality/Value: The study introduces a comprehensive analytical framework that integrates digital, financial, and behavioural indicators into a unified model to assess business model effectiveness in the hospitality industry, offering both theoretical advancement and practical applicability.