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Authors - 9808
Nikolett Sz Gulyás
57221762383
Zeyad Khalil
57208908389
Ákos Tussay
57225963534
Zoltán Csabai
14013369300
Publications - 6374
Rediscovering Visualization - Towards an up-to-date conceptual framework for promoting learning of Mathematics in engineering education
Publication Name: Sefi 47th Annual Conference Varietas Delectat Complexity is the New Normality Proceedings
Publication Date: 2020-01-01
Volume: Unknown
Issue: Unknown
Page Range: 667-679
Description:
Students in engineering education need tools to gain insight into the ever-increasing complexity of engineering problems and possible solutions in the 21st century (e.g. seeking the reasons for the recent bridge-collapse in Genova). One of these tools could be the utilization of mathematical knowledge and skills - but many engineering students are undermotivated in studying mathematics. Not only Comenius but our digital age also prefers visualization over textual comprehension, as the Net generation is visually literate. Newer interdisciplinary research findings in brain functions and brain maturation are worth to be integrated into the pedagogy of teaching mathematics to engineers. Methodologically, in order to improve the quality of teaching Mathematics in engineering education at a Hungarian university, both findings in brain-research as well as theories of adult learning have been analysed from the perspective of visualization. The other direction of the work was focused on different types of visualization in Mathematics (according to Guzman), particularly in textbooks for engineering students. Ten textbooks, (among them the newly developed „Mathematics 1” at the Széchenyi István University), available both in print and online in Hungary have been compared from visual aspects. The current Curriculum of the subject „Mathematics 1” has also been analyzed from visual aspects. Findings show the need for a wider variety of visualization. Systematically detailing all of the above-mentioned perspectives and findings of data-processing contribute to developing an up-to-date conceptual framework for improving the quality of teaching Mathematics in engineering education at a Hungarian university, and it might be useful for other universities as well.
Open Access: Yes
DOI: DOI not available
Classifying Genetic Lines in Pork Production by Ileal Crude Protein and Amino Acid Digestibility in Growing Pigs
Publication Name: Animals
Publication Date: 2023-06-01
Volume: 13
Issue: 12
Page Range: Unknown
Description:
The first aim of the study was to evaluate the effect of different dietary lysine (LYS) to energy (DE) ratios on the apparent ileal digestibility (AID) of crude protein (CP) and selected amino acids (AA) in growing pigs (40–60 kg) of different genotypes. The second aim was to classify genotypes into groups based on the AID of CP and AAs. The trials were conducted on a total of 90 cross-bred barrows (30 animals/genotype) in two replicates. Before the trial series, the experimental animals (average initial body weight (BW) = 40.9 ± 8.5 kg) were surgically fitted with post valve T-cannula (PVTC). The diets were formulated with six different total LYS/DE ratios. Titanium dioxide (TiO2 ) was added to the diets (5 g/kg) as an indigestible marker. Based on our results, it can be concluded that the LYS/DE ratio of the diets affected the AID of the CP and AA in different ways by each genotype (p < 0.05). It can also be concluded that pigs of different genetic potential can be classified with a high accuracy (91.7%) in respect of their CP and AA digestive capacity. Our results indicate the development of genetic-profile-based swine nutrition technologies as a future direction.
Open Access: Yes
DOI: 10.3390/ani13121898
Determination of center of gravity and moment of inertia using dynamic testing method
Publication Name: Advances in Acoustics Noise and Vibration 2021 Proceedings of the 27th International Congress on Sound and Vibration Icsv 2021
Publication Date: 2021-01-01
Volume: Unknown
Issue: Unknown
Page Range: Unknown
Description:
The knowledge of a vehicle's center of gravity (COG) and moment of inertia (MOI) are important from vehicle dynamic and comfort points of view. These parameters can be determined from the CAD model of the vehicle, however, manufacturing inaccuracies and additional elements can modify the values, and experimental validation can be necessary. The determination of COG (and even MOI) can be carried out using classical physical methods, but a more convenient and sophisticated method is offered based on dynamic testing data. The method is known and accessible even in commercial testing software, but a clear recommendation for the optimal input data and the expected accuracy is still not available. The purpose of this study is to define the influencing factors of the measurement and quantify their effect. The introduced method is based on the evaluation of the frequency response functions in the mass-line region. Input data were obtained by using impulse hammer excitation and accelerometers for measuring the response of the structure. The measurements and the evaluations were performed in Siemens LMS Test.Lab software using Rigid Body Calculator module. The results of the dynamic measurement are compared to CAD data and to the COG value got from simple static measurement.
Open Access: Yes
DOI: DOI not available
Sustainable closed-loop supply chain network design under uncertainty using a fuzzy multi-objective optimization framework for the battery industry
Publication Name: Scientific Reports
Publication Date: 2026-12-01
Volume: 16
Issue: 1
Page Range: Unknown
Description:
The study presents a sustainable closed-loop supply chain network that integrates financial, environmental, and social objectives within a context of uncertainty. A fuzzy-based modeling approach is introduced to address uncertainty in customer demand, cost parameters, and carbon emission coefficients across the sustainable closed-loop supply chain network. Two metaheuristic methods, the non-dominated sorting genetic algorithm II (NSGA-II) and multi-objective particle swarm optimization (MOPSO), are employed to address the problem and are compared against each other. A practical case study of a battery company is employed to validate the framework. The findings indicate that MOPSO surpasses non-dominated sorting genetic algorithm II in terms of solution quality and computational efficiency, compared with NSGA-II, the proposed MOPSO achieved a 6.3% reduction in total cost and an 8.1% decrease in CO₂ emissions, while the social index reflecting recruitment and employee security increased by 12.5%. This study contributes a sustainable closed-loop supply chain network design model for the battery industry that together optimizes economic, environmental, and social objectives amid parameter uncertainty, and offers algorithmic evaluations of optimized multi-objective metaheuristics to achieve high-quality Pareto solutions.
Open Access: Yes
The impact of coordination skill development on Year 4 pupils’ mathematics performance and engagement
Publication Name: International Journal of Educational Research
Publication Date: 2026-01-01
Volume: 137
Issue: Unknown
Page Range: Unknown
Description:
Classroom lessons supported by physical activity improve primary school children's cognitive levels, attention and engagement. Research demonstrates that incorporating the development of coordination skills and associated tasks into mathematics lessons leads to positive changes in students' behaviour and their willingness to engage with tasks. The use of innovative tools and methods to support movement-based development in the classroom remains an under researched area. Therefore, the aim of this study is to evaluate the effectiveness of an innovative sports tool and its associated motor coordination-based methods in the teaching of mathematics to Year 4 primary school students. Pupils from a primary school in a county town participated in the study. The sample was divided into experimental group ( n = 28) and the control group ( n = 27). The innovative coordination tool and its specific teaching methods was employed to support the teaching and learning process in mathematics over a 10-week programme. The effectiveness of this non-traditional educational tool was assessed through algebra and geometry worksheets completed before and after the intervention. Additionally, interviews were conducted with teachers and school leaders to gain insight into understand the broader impact of the intervention on the school. According to repeated ANOVA analysis, a small effect was detected for the variables of time and group. Additionally, a large effect was observed between the pre- and post-measurement within the groups, alongside a small effect between the groups. Significant improvements in both algebra and geometry variables were found in the experimental group from pre- to post-measurement, whereas no significant differences were observed in the control group. In-depth interviews corroborated the effectiveness of the innovative sports system across cognitive, affective and social domains, from both managerial and teaching perspectives. Based on the findings of this study, it can be concluded that 10–15 min of the coordination development programme inserted into lower primary school classroom activities over a 10-week period resulted in significant improvements in academic achievement and engagement in mathematics.
Open Access: Yes
THE ROLE OF TOURISM MANAGEMENT FOR SUSTAINABLE TOURISM DEVELOPMENT IN NATURE RESERVES IN HUNGARY
Publication Name: Geojournal of Tourism and Geosites
Publication Date: 2023-01-01
Volume: 49
Issue: 3
Page Range: 893-900
Description:
The aim of the research is to reveal the opinion of regional professionals involved in the management of sustainable tourism and its three pillars. Through the results of 27 in-depth interviews with decision-makers and NGOs, we have explored the perceptions of the economic, environmental and social factors, both positive and negative, and the importance of each factor. The analysis of the results clearly shows a difference of opinion between decision-makers and NGOs. The negative impacts of tourism were highlighted by respondents, mainly in terms of the impact on the natural and economic environment, however, the positive impacts were more prominent. The research showed that the impacts on social environment were perceived more positively by respondents, and NGOs did not emphasise negative impacts in this category. The study shows that the role of tourism management in nature conservation areas is necessary and important for sustainable tourism development. The research clearly demonstrates that sustainability is an important issue in tourism. The results of the research also show that decision-makers are not familiar with the concept of sustainability, its precise content and their preparation and knowledge are insufficient to make the right decisions on the subject. The research shows that there is a shortage of professionals with expertise in tourism management, which makes it difficult to implement coordinated tourism development in the area under study.
Open Access: Yes
Exploring the competitiveness of tourism in Hungary: Recent findings and results
Publication Name: Journal of Infrastructure Policy and Development
Publication Date: 2024-01-01
Volume: 8
Issue: 10
Page Range: Unknown
Description:
This research evaluates the regionalization of tourism in Hungary, revealing the breakdown of the national gross domestic product (GDP) of tourism. It also explores the density, spatial variations, and features of these indicators. A multimodal approach is used to evaluate the competitiveness of Hungarian counties, and the distribution of these tourism regions is analyzed using the tourism penetration index. Furthermore, regional GDP is calculated for the whole territory of Hungary. The study identifies significant regional disparities in tourism competitiveness, highlighting Budapest-Central Danube as the most competitive region and Lake Balaton as underperforming despite its potential. The research contributes by providing a detailed regional GDP analysis and emphasizing the need for targeted policy interventions to enhance tourism development across all regions.
Open Access: Yes
Business Model Innovation in E-Commerce: Ethical Business Leadership Through Service Architecture Diversification
Publication Name: Business Ethics and Leadership
Publication Date: 2026-01-01
Volume: 10
Issue: 1
Page Range: 41-65
Description:
In e-commerce, advances in digital technology are increasingly driving service innovation, reshaping the principles of competitiveness and value creation through customer orientation, service quality, seamless customer experience, transparency, and trust. These elements add a new dimension to ethical business leadership. While current literature largely treats servitization and business model innovation as distinct phenomena, the portfolio architecture of service configurations as an independent mechanism of related diversification and the potential moderators of its ethical impact remain insufficiently formalized. This study aims to conceptualize service architecture diversification as a form of diversification through a portfolio of service-oriented business models and to examine its relationship with financial performance under varying levels of ethical components, specifically transparency and trust. The analysis is based on panel data from eight Ukrainian online retailers for the period 2019–2024. The study utilizes key indicators from official financial statements and a composite transparency and trust index constructed from publicly available information across four transparency markers. To quantify service architecture diversification, a composite index was developed using reproducible data. Methodologically, the study employs five panel regressions with fixed effects for online retailers and years, along with nonlinearity tests and lagged diagnostic models. Standard errors were estimated using heteroscedasticity-consistent standard errors, and the analysis was performed using Python’s statsmodels. Two separate series of regression models were constructed for different dependent variables, namely ROA and operating margin. In the baseline linear models, the effect of service architecture diversification is not statistically significant for either operating margin (p = 0.942) or ROA (p = 0.546), suggesting no immediate within-year effect. Nonlinearity diagnostics for ROA suggest a phased pattern, in which the quadratic term is negative and close to significance (b =-0.038; p = 0.067). In sensitivity checks excluding influential observation, significance becomes stronger in both the operating margin series (p = 0.025) and the ROA series (p = 0.046). Lagged tests for operating margin reveal a short-term negative relationship (b =-0.039; p = 0.002) together with a positive interaction between the indices (SArD×TT(t−1): b = 0.0056; p = 0.027). This is interpreted as evidence of the potential role of ethical transparency and trust in mitigating the negative effects of service transformation, although this moderating effect is sensitive to sample composition. From a practical perspective, the article positions service architecture diversification as a manifestation of ethical business leadership in business model innovation and establishes directions for further research aimed at refining its operationalization, clarifying its architectural alignment with the principles of ethical leadership, and explaining the mechanisms for overcoming the servitization paradox in the context of online retail.
Open Access: Yes
Grassed Tramway Tracks and Sustainable Urban Mobility: Integrating Nature-based Solutions in City Transport Infrastructure
Publication Name: Acta Polytechnica Hungarica
Publication Date: 2026-01-01
Volume: 23
Issue: 1
Page Range: 271-286
Description:
Urban mobility is crucial to sustainable city development, bridging environmental preservation, economic advancement, and social equity. This paper investigates the potential of grassed tramway tracks (or green tracks) in contributing to sustainable urban mobility and aligning with the United Nations Sustainable Development Goals (SDGs). The study highlights the transformative potential of green tracks by analyzing ecological impact, carbon sequestration, and a comparative evaluation of ecological footprints. The findings emphasize their role in mitigating climate change, enhancing urban biodiversity, and promoting resilient infrastructure, positioning them as a critical solution for achieving sustainable urban development.
Open Access: Yes
