Search in Publications
Found 6334 publications
CRUSHED STONE SUPPLY CHALLENGES FOR INFRASTRUCTURE DEVELOPMENT IN HUNGARY
Publication Name: Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu
Publication Date: 2024-01-01
Volume: Unknown
Issue: 6
Page Range: 28-37
Description:
The rapid expansion of Hungary’s infrastructure projects, especially in railway construction, has significantly increased the demand for crushed stone. Both national and EU-funded initiatives have strained supply chains, resulting in logistical challenges and material shortages. With limited domestic production capacity, efficient resource management is crucial to keeping projects on track. This paper evaluates Hungary’s supply chain for crushed stone, identifying key weaknesses and proposing solutions to enhance sustainability. Purpose. This study investigates the logistical and supply chain difficulties in delivering crushed stone for Hungary’s railway infrastructure projects. It evaluates current supply limitations, proposes ways to improve domestic resource management, and offers strategies to reduce reliance on imports while emphasizing sustainability. Methodology. The research applies Geographic Information System (GIS) modeling to analyze transportation routes for crushed stone, suggesting ways to streamline logistics. It examines the production capacities of Hungarian quarries, some producing 15,000–25,000 tons monthly, and assesses the impact of European and Hungarian regulations on material quality and availability. The potential for integrating recycled materials into the supply chain is also explored. Findings. Hungary’s domestic quarries cannot meet the high demand for railway ballast, estimated at 192,000 tons annually, leading to import reliance. GIS modeling shows optimized transportation routes could cut costs and carbon emissions. Incorporating smaller stone fractions and recycled materials could mitigate shortages, with recycled materials potentially comprising 40 % of railway ballast. Originality. By integrating geological, logistical, and regulatory insights, this paper provides novel approaches for addressing Hungary’s crushed stone supply chain challenges. The use of GIS modeling and recycled materials offers innovative solutions for reducing environmental impacts. Practical value. The findings present actionable strategies for improving Hungary’s supply chain efficiency, promoting recycling, and optimizing logistics. These solutions are applicable to Hungary and other regions facing similar infrastructure material supply challenges.
Open Access: Yes
Evaluating Sustainable Online Education: A Cross-Disciplinary Analysis of IT Device Utilization among Slovakian and Hungarian University Students
Publication Name: Sustainability Switzerland
Publication Date: 2024-01-01
Volume: 16
Issue: 2
Page Range: Unknown
Description:
By the onset of the 21st century, online presence had become prevalent in higher education, with the COVID-19 pandemic further accelerating this trend. However, the success of online education and its assessment by students can differ significantly from region to region and according to the field of study. This can be influenced by students’ habits of using IT devices, but it can also occur the other way around. In this research, experiences related to online education were examined in the fields of Informatics, Agriculture and Pharmacy education at two higher-education institutions in Slovakia and one in Hungary, considering the environmental and social sustainability implications. In the study, in addition to simple statistical methods, a cross-tabulation analysis was carried out using Cramer’s V method. The results have shown that the students of the investigated institutions confidently navigate the online world; they are conscious users of IT tools without being addicted. A total of 74% of students in Mosonmagyaróvár believe they possess sufficient information about the risks associated with computers, mobile phones, and the Internet, whereas only 34% of students in Košice share the same sentiment. The reason for the differences between these characteristics can be attributed to the specialties of the different majors, and not to those arising from regional differences, raising important questions about the ecological sustainability of online education practices. A relatively great consistency can be observed in the assessment of online learning among students from the three institutions, with approximately 85% expressing overall satisfaction with the online learning experience. The easier availability of study materials and savings on travel are mentioned as advantages, contributing to economic sustainability. However, separation from their mates and the lack of practical training may be regarded as a disadvantage for them, as they seem to have a preference for face-to-face training. Overall, it may be concluded that purely online training in the fields of Informatics, Agriculture, and Pharmacy training is not feasible for the time being, necessitating a balanced and sustainable approach for the future.
Open Access: Yes
DOI: 10.3390/su16020699
Potential of Producing Green Hydrogen Using Solar Power Plants: The Role of PEM Technology in the Improvement of Photovoltaic Schedule Keeping in Hungary
Publication Name: Chemical Engineering Transactions
Publication Date: 2024-01-01
Volume: 114
Issue: Unknown
Page Range: 925-930
Description:
Similarly to many countries of the world, photovoltaic systems play an increasingly important role in electricity generation in Hungary, contributing greatly to the climate, environmental and sustainability goals of the energy transition. As a result of numerous factors, photovoltaic technology is used not only more and more widely but also in increasingly decisive quantities and proportions. Due to the intermittent nature of solar energy, photovoltaic generation varies both in space and over time and consequently poses a serious challenge to system management, especially due to dynamically developing capacities. The imbalances caused by uncertainty cannot be addressed by scheduling alone without the possibility of energy storage, which, with its numerous services and applications, is able to provide the flexibility necessary for the smooth operation of the system. Among the available energy storage systems, power-to-gas technology (i.e. converting electricity produced from renewable energy sources into a gaseous energy carrier) is emerging as a practical solution with high potential for the integration of variable renewable energy sources. The gas produced in this way, which can be stored and transported, can be used in many areas and sectors of energy use, such as transport, home heating and cooling and industrial processes, and can now also provide an effective solution for grid stability and scheduling. The aim of the present research is to present the potential amount of green hydrogen that can be produced by proton-exchange membrane technology (PEM) in connection with schedule-related downregulation, considering the climatic conditions and the total photovoltaic power plant capacity in Hungary. The novel, practical benefit of the research lies in the fact that it determines practically relevant characteristics in relation to the interconnections of solar power plants in Hungary and power-to-gas technology for transmission system operators, the key players of the energy market and decision-makers. This knowledge will not only help companies investing in solar power plants and power-to-gas technology from an economic point of view but can also contribute to the market-related development of hydrogen production solutions related to photovoltaic technology. Overall, P2G offers the ideal potential to convert the electricity produced by solar power plants that need to be downregulated, i.e. comprises a surplus in terms of scheduling, into green hydrogen, which is also suitable for long-term seasonal storage.
Open Access: Yes
DOI: 10.3303/CET24114155
Application of artificial neural networks for characterisation of formability properties of sheet metals
Publication Name: International Journal of Lightweight Materials and Manufacture
Publication Date: 2024-01-01
Volume: 7
Issue: 1
Page Range: 37-44
Description:
Artificial neural network models were developed to estimate forming limit diagrams from tensile test results based on our own experiments and data from the literature for steel and aluminium sheet metals. Experimental data were obtained from tensile tests and Nakazima tests. The input parameters used in the models were yield strength, ultimate tensile strength, uniform elongation, elongation at fracture, anisotropy coefficient and hardening exponent or combinations of these. The forming limit curves were defined by the measured minor and major strains using seven standard test specimens. After training the artificial neural network, the difference between measured and predicted results was evaluated by linear regression parameters and by the absolute errors. For steel sheet data taken from the literature, the estimated outputs of ANN models were compared with the results of empirical formulae developed by different authors. It was found that there was a high correlation coefficient between predicted and measured values for models using neural networks, which gave better approximations than other linear and non-linear models.
Open Access: Yes
Comparison of Hydrogen Related Policies and Achievements between Latin America and Europe
Publication Name: Chemical Engineering Transactions
Publication Date: 2024-01-01
Volume: 114
Issue: Unknown
Page Range: 991-996
Description:
Hydrogen, and green hydrogen will be one of the dominant energy sources of the future, the application of which will support the achievement of existing decarbonisation targets and contribute to the smooth integration of renewables into energy infrastructure based on its energy storage characteristics. The goal of this study is to compare hydrogen-related policies and achievements between Latin America and Europe. The research employs a comprehensive literature review to assess existing policy frameworks, technological advancements, and economic impacts in both regions. Preliminary findings indicate that while Europe has developed a more structured and well-funded hydrogen economy, Latin America shows great potential due to its renewable energy resources but lags in policy coordination and investment. The significance of this work lies in identifying key gaps and opportunities, aiming to provide policy recommendations that can enhance hydrogen development strategies in both regions, ultimately contributing to global decarbonization efforts.
Open Access: Yes
DOI: 10.3303/CET24114166
Private banking market developments: Evidence from Hungary
Publication Name: Journal of Infrastructure Policy and Development
Publication Date: 2024-01-01
Volume: 8
Issue: 12
Page Range: Unknown
Description:
Private banking institutions serve the financial sector’s wealthiest clientele via a dedicated value proposition. Based on the relevant tendencies and statistics, a remarkable expansion can be outlined since the mid-1990s. The aim of this study is to elaborate the Hungarian private banking market’s development as a case study. The paper also intends to add to the literature on this unique segment of the financial market. Based on the available statistics, the analysis primarily focuses on the Hungarian private banking market’s rapid development process. This can be underpinned by the clientele’s savings, number of accounts and respective segmentation limits of the institutions. Referring to the amount of savings, a correlation analysis indicates significant co-movements with specific social and economic variables. The growth rate of the Hungarian clientele’s savings outperformed the respective indicator in Western Europe during the review time period (2007–2020). The current paper also includes a section that summarises general challenges that private banking managers need to address during the development process. Generally, the literature on private banking can still be considered scarce, whereas there is a lack of studies on the Central-Eastern European region. The analysis of the Hungarian sector’s development path can serve with relevant information to any financial expert in the field.
Open Access: Yes
DEM Analysis of Ballast Particle Direct Shear Tests: Exploring the Influence of Varying Particle Size Distributions on Shear Stress
Publication Name: Advances in Transdisciplinary Engineering
Publication Date: 2024-01-01
Volume: 59
Issue: Unknown
Page Range: 88-95
Description:
The dimension of particles can significantly influence the load response and the performance of uniformly graded ballast layers in railway track structures in real-world conditions. Yet, the micromechanical behavior of the unbound aggregate ballast layer assembly, particularly affected by particle size, remains largely unexplored. In this study, the distinct element model of a direct shear test was initially simulated using friction coefficients of 0.8, 0.9, and 1, and particle size distribution No.4A. The dimensions of the shear test box were 300 mm in width, 300 mm in length, and 180 mm in height. Additionally, a constant normal force of 333 kPa was applied to the sample during the simulation. Subsequently, this model was compared with experimental results, revealing a close correspondence between simulated and experimental shear stress-displacement curves, particularly for the friction coefficient of 1. Following this verification, the validated model was employed to investigate three other particle size distributions: No.4, No.5, and No.57. The results demonstrated a reduction in shear stress for particle size distributions No.4, No.5, and No.57 compared to No.4A, with quantified decreases of 11.9%, 38.2%, and 56.7%, respectively.
Open Access: Yes
DOI: 10.3233/ATDE240531
EXAMINING THE DEMAND RELATIONSHIPS OF BETWEEN RELIGIOUS TOURISM AND EXAMPLE OF URBAN ATTRACTIONS IN THE GYŐR-PANNONHALMA TOURIST AREA
Publication Name: Geojournal of Tourism and Geosites
Publication Date: 2024-01-01
Volume: 57
Issue: Unknown
Page Range: 2114-2122
Description:
This study examines the sacred places of Győr-Moson-Sopron County (Western Hungary), focusing on people's attitudes towards them. Pannonhalma is part of the world heritage, the Győr Cathedral, and the five church festivals (Roman Catholic, Jewish, Reformed, Lutheran, Greek Oriental) held in the city are important places of worship. The aim of the study was to analyse the scope of religious tourism in the World Heritage Site and to examine the demographics of the demand for urban religious centres. Primary research was conducted with a quantitative (questionnaire) survey between 10th September 2023 and 30th October 2023. The sample of 666 persons is not representative, respondents were chosen with arbitrary sampling. Data were processed using the SPSS 23 statistical program package which contains cross-table analysis, in addition to the descriptive statistical analyses. The most important finding of the study is that travel propensity is determined by the importance and familiarity of urban landmarks, and significance can be found here. Respondents' age, educational attainment and gender also show significant differences in terms of the attractiveness of visiting attractions (distance from their residence). The research investigated the demand for Roman Catholic, Jewish, Reformed, Evangelical and Greek Orthodox religious attractions in Győr and the Pannonhalma Benedictine Abbey, a World Heritage Site, according to local specificity. There is significant evidence of a regional pull effect of the World Heritage status of the built heritage site. The city churches and their associated events are most popular with the elderly, women and those with higher education.
Open Access: Yes
Examination of the Resistance Components of an Energy-Efficient Electric Vehicle
Publication Name: Journal of Physics Conference Series
Publication Date: 2024-01-01
Volume: 2848
Issue: 1
Page Range: Unknown
Description:
The paper presents a comprehensive examination of measurement-based modelling regarding resistance forces. This work offers a detailed explanation of the experimental techniques employed to measure the resistance forces experienced by a lightweight vehicle. The modelling approach is particularly beneficial for characterizing vehicle with low resistance values. Our investigation encompasses key vehicle motion states, including cornering and straight-line motion, making it greatly useful for optimization purposes. The measurements were conducted in a proving ground and laboratory environment. The road load coefficients can be breakdown into components from total resistance force measurement. Based on breakdown, future vehicle development goals can be addressed with a focus on reducing resistance forces.
Open Access: Yes
