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Publications - 6383

Differences, constraints and key elements of providing local sharing economy services in different-sized cities: A Hungarian case

Katalin Czakó Dávid Fekete Kinga Szabó Marcell Tóth

Publication Name: Resources

Publication Date: 2019-09-01

Volume: 8

Issue: 3

Page Range: Unknown

Description:

The business models of sharing economy services can differ fromeach other in different-sized cities. This paper provides a deeper understanding of the implementation of locally operating services for car, bicycle and office sharing in the urban environment. Our goal is to reveal the differences between the capital city and an economically well-developed city in order to provide beneficial findings to the development of the presently operating services, or to the possible implementation of future services. Methodology of the paper applies the Business Model Canvas approach (BMC). We introduce a comparative analysis using data from the Hungarian database, which records details of all the publicly visible sharing economy services countrywide. The results show that BMC can reflect the main differences, constraints and key elements in the business models of sharing economy services. We can say that, in the case of a bike sharing service operated in the non-capital city, there is more segmentation than seen in the same service in the capital. There are significant price differences, especially in the case of long-term tickets. The number of inhabitants and private capital remain the biggest constraints in the case of car-sharing services, but there is also a possibility of implementation in the non-capital cities by applying small-scale services with a good value proposition and segmentation.

Open Access: Yes

DOI: 10.3390/resources8030147

Energy poverty dynamics and geostrategic shocks: Moderation of financial markets

Vishal Dagar Amar Rao Wajid Ali Nidhi Dhankar

Publication Name: Energy Policy

Publication Date: 2026-08-01

Volume: 215

Issue: Unknown

Page Range: Unknown

Description:

Universal energy poverty is a key ingredient to social inequality, education barrier and poor health outcome. Therefore, it is crucial for policymakers to identify the factors that mitigates energy poverty. Present study examined the influence of geopolitical risk on energy poverty, focusing on financial market depth, access and efficiency in 42 economies, spanning 2000 to 2022, using instrument variable two stage least square (2SLS), three stage least square (3SLS) approach and double panel threshold regression. The estimation provides following observations. First, geopolitical risk significantly intensify energy poverty over time. Second, natural disasters is a more serious hindrance to energy access. Third, financial markets significantly moderates the favourable spillover effects of geopolitical risk on energy poverty, dampens negative effect of geopolitical risk, improving household energy access, and reducing vulnerability to external shocks. Alongside this, the research provide similar pattern in urban and rural concentration, indicating the severe effect of geopolitical and natural disaster risk in rural areas. Moreover, the research explored several other factors and prioritizes digitalization, economic growth and political liberty as the major attributes for mitigating energy poverty. Hence, this research, provides stronger support for the roles of financial markets and digitalization in mitigating the energy poverty in the long run. This paper further delves into the policy implications arising from the findings.

Open Access: Yes

DOI: 10.1016/j.enpol.2026.115278

Multilayer perceptrons constructed of fuzzy flip-flops

László Gál Rita Lovassy László T. Kóczy

Publication Name: Isciii 09 4th International Symposium on Computational Intelligence and Intelligent Informatics Proceedings

Publication Date: 2009-12-28

Volume: Unknown

Issue: Unknown

Page Range: 9-14

Description:

The target of this paper is to propose a hybrid combination of the three main branches of Computational Intelligence, namely Fuzzy Systems, Neural Networks and Evolutionary Computing. The function approximation properties of fuzzy J-K and D flip-flops based feedforward neural network optimized and trained with a novel evolutionary algorithm based technique; the Bacterial Memetic Algorithm with Modified Operator Execution Order (BMAM) is studied. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/ISCIII.2009.5342288

A qualitative exploration of narratives among problematic exercise experiences

Álvaro Sicilia Manuel Alcaraz-Ibáñez Mark D. Griffiths Attila Szabo

Publication Name: Journal of Behavioral Addictions

Publication Date: 2026-03-01

Volume: 15

Issue: 1

Page Range: 497-508

Description:

Background and Aims: Exercise is recognized as essential for health, but exercise addiction remains a lesser-known phenomenon. Unlike substance addictions, excessive exercise is often celebrated, making it difficult to distinguish between dedication and compulsion. To understand what exercisers perceive as problematic within their exercise context, a qualitative study was conducted investigating personal experiences.MethodsThrough a reflexive thematic analysis, the present study analyzed 153 narratives from individuals who experienced physical, psychological, or emotional problems due to exercise.ResultsFour main themes emerged: (i) The social pressure of a performativity-oriented culture; (ii) Everything seemed to be going well until the injuries appeared; (iii) Time is money: Interpersonal conflicts; and (iv) It is my responsibility: Intrapersonal conflict. The results suggest that a culture of performance provides an interpretive framework that shapes and sustains problematic exercise experiences. Participants internalized performative values, leading to strict demands and fear of failure, resulting in severe injuries in over 70% of cases. In participants' narratives, the forced interruption of activity was associated with the reported emergence of withdrawal symptoms, with health and morality discourses providing the framework for rationalizing their excessive dedication.ConclusionsThese findings suggest that problematic exercise is not an individual issue, but an expression of a broader culture prioritizing performance. These results underscore the importance of shifting toward biopsychosocial interventions that foster identity flexibility and prioritize holistic well-being and enjoyment over performance metrics.

Open Access: Yes

DOI: 10.1556/2006.2025.00526

Effects of Location and Height of Vortex Generators on Aerodynamic Performance of NACA 4412 Airfoil

I. Lakatos Dénes Ágoston Solnay József Molnár

Publication Name: Periodica Polytechnica Transportation Engineering

Publication Date: 2025-01-01

Volume: 53

Issue: 3

Page Range: 267-276

Description:

This study focuses on the aerodynamic effect of vortex generators (VGs) placed on the wing surface, with a focus on the height and chordwise position of the VGs. NACA 4412 airfoil was used for the investigation, which is a frequently used and well-researched airfoil in the aerospace industry, with a chord length (c) of 200 mm. Six different configurations have been analyzed with Computational Fluid Dynamics (CFD), with three chordwise positions (x) and two trailing edge heights (h). The results showed that VGs placed furthest from the leading edge (x/c = 20%) were able to increase lift and reduce drag to the greatest extent. In terms of height, the shorter (h/c = 0.5%) VGs produced the most lift. These results provide valuable insights as to how vortex generator design can be optimized for aerodynamic performance across various operating conditions.

Open Access: Yes

DOI: 10.3311/PPtr.38258

A comprehensive analysis of European Union funds for higher education institutions in Hungary

Mónika Rajcsányi-Molnár Márta Konczos Szombathelyi Nóra Mária Halmai

Publication Name: Journal of Infrastructure Policy and Development

Publication Date: 2024-01-01

Volume: 8

Issue: 13

Page Range: Unknown

Description:

This study aims to examine the evolution of the system of support sources in Hungary, focusing on the specific goals supporting higher education in the development programs Széchenyi 2020 (2014–2020) and Széchenyi Plan Plus (2021–2027). The study provides insights into development program evolution and changes, aiming to inform EU funding opportunities for Hungarian higher education institutions over a nearly 10-year period. By focusing on the operational programs that are the basis for the upcoming tenders, the study will display the target system of EU funds that can be utilized to bolster higher education institutions in Hungary. The study is based on document analysis, examining the Hungarian policy tools of the development programs and the operational program strategies of the ten-year time period from 2014 to 2024. By analyzing the support landscape for higher education institutions in Hungary, this study contributes to a better understanding of how the key objectives and criteria of strategic programs have evolved. It also examines the aspects and elements defined in two different development programs over the last ten years. The result of the study can contribute to anticipate the types of funding opportunities that may be available in the future and inform future decision-making processes.

Open Access: Yes

DOI: 10.24294/jipd9069

Prudent use of antibiotics in pig farming: National and international practices and regulatory framework

László Búza Szabó István László Gombos Veronika Gombosné Szűr László Varga

Publication Name: Magyar Allatorvosok Lapja

Publication Date: 2026-01-01

Volume: 148

Issue: 2

Page Range: 103-120

Description:

Antimicrobial agents, and especially antibiotics, have played a crucial role in combating infectious diseases for decades. As antimicrobial resistance (AMR) becomes more widespread, treatment efficacy decreases, leading to therapeutic failures and significant economic consequences. Global efforts to address AMR are increasingly guided by the “One Health” approach, which emphasizes coordinated strategies spanning human, animal, plant, and environmental health. AMR is now one of the most pressing global health challenges, affecting humans, animals, crops, and ecosystems alike. Among its many contributing factors, the inappropriate use of antimicrobials is particularly critical. To better understand the factors influencing AMR and to implement and assess strategies for reducing antimicrobial use (AMU), accurate and detailed data on actual usage and indications are essential. Systematic data collection allows stakeholders to evaluate their current antibiotic practices and identify areas needing intervention. In EU member states with established traditions of AMU analysis, centralized databases facilitate benchmarking across sectors and countries; however, reporting and analyzing AMU data remains a significant challenge for both EU and national administrations. At the societal level, growing consumer concern demands that veterinarians and livestock keepers gain a deeper understanding of the root causes of disease and production losses. This knowledge supports informed decision-making aimed at improving overall herd health, ensuring economic viability, promoting responsible AMU, and reducing environmental impact. Experience in Hungary and abroad shows that achieving optimal AMU in large-scale livestock farming requires a shift in mindset. This literature review aims to provide a comprehensive overview of the global, European and Hungarian challenges in the fight against antibiotic resistance. It also presents current data collection and monitoring systems, along with the core principles and strategies of responsible AMU.

Open Access: Yes

DOI: 10.56385/magyallorv.2026.2.103-120

Unveiling the significance of rhizosphere: Implications for plant growth, stress response, and sustainable agriculture

Zoltán Molnár Tibor Janda Wogene Kabato

Publication Name: Plant Physiology and Biochemistry

Publication Date: 2024-01-01

Volume: 206

Issue: Unknown

Page Range: Unknown

Description:

In the rhizosphere, the activities within all processes and functions are primarily influenced by plant roots, microorganisms present in the rhizosphere, and the interactions between roots and microorganisms. The rhizosphere, a dynamic zone surrounding the roots, provides an ideal environment for a diverse microbial community, which significantly shapes plant growth and development. Microbial activity in the rhizosphere can promote plant growth by increasing nutrient availability, influencing plant hormonal signaling, and repelling or outcompeting pathogenic microbial strains. Understanding the associations between plant roots and soil microorganisms has the potential to revolutionize crop yields, improve productivity, minimize reliance on chemical fertilizers, and promote sustainable plant growth technologies. The rhizosphere microbiome could play a vital role in the next green revolution and contribute to sustainable and eco-friendly agriculture. However, there are still knowledge gaps concerning plant root-environment interactions, particularly regarding roots and microorganisms. Advances in metabolomics have helped to understand the chemical communication between plants and soil biota, yet challenges persist. This article provides an overview of the latest advancements in comprehending the communication and interplay between plant roots and microbes, which have been shown to impact crucial factors such as plant growth, gene expression, nutrient absorption, pest and disease resistance, and the alleviation of abiotic stress. By improving these aspects, sustainable agriculture practices can be implemented to increase the overall productivity of plant ecosystems.

Open Access: Yes

DOI: 10.1016/j.plaphy.2023.108290

Influence of Cyclic Loading on the Removal Torque of Unique Subperiosteal Implant Screws

Ibolya Zsoldos Dávid Pammer K. Kulcsár Ádám Vörös

Publication Name: Journal of Functional Biomaterials

Publication Date: 2025-09-01

Volume: 16

Issue: 9

Page Range: Unknown

Description:

During the investigation, the effect of screw tightening torque on the potential loosening of screws under load was examined in the case of custom-made subperiosteal implants. The study focused on the connection screws between the implant components, testing the commonly applied tightening torques of 15 Ncm and 30 Ncm. Mastication was simulated using a custom-designed, PLC-controlled testing device, which allowed for the reproduction of variable numbers, forces, and speeds of bite cycles. With this device, six different scenarios were tested, including 500, 2000, and 10,000 bite cycles, under both constant and variable bite forces. A caliper was used to record potential length changes of the screws, force sensors measured the bite forces, and calibrated torque screwdrivers were used to verify the loosening torques. Based on the analysis of the measured data, it was concluded that for the M1.8 screws tested, a tightening torque of 15 Ncm does not provide sufficient resistance against loosening, whereas 30 Ncm offers adequate stability.

Open Access: Yes

DOI: 10.3390/jfb16090306