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Found 6374 publications

On a new doctoral (PhD) school in multidisciplinary engineering sciences

Peter Foldesi Laszlo T. Koczy László Keviczky

Publication Name: 2011 International Conference on Information Technology Based Higher Education and Training Ithet 2011

Publication Date: 2011-10-04

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Széchenyi István University (SIU) is one of the youngest universities in Hungary, however, the school has three century old origins. The immediate predecessor of SIU was an engineering college founded 40 years ago. © 2011 IEEE.

Open Access: Yes

DOI: 10.1109/ITHET.2011.6018691

Two problems with the use of the cost-push input−output price model

Koppány Krisztián

Publication Name: Economic Systems Research

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This paper identifies two problems related to the use of the cost-push input–output (IO) price model that have not been previously discussed in the literature. These problems and their proposed solutions are presented with numerical examples and illustrative applications. The first issue relates to the variation of export exchange rates, which cannot be modelled within the framework, yet affects the output-price index. Without addressing this problem separately, the model yields an incorrect result. The second issue concerns the available data compatible with IO tables and IO price analyses, specifically the output price deflators or implicit price indices. Being of the Paasche-type, these indices are better suited for retrospective studies than for forecasting. This paper proposes a basic decomposition framework for analysing output price inflation both before (ex-ante) and after (ex-post) it occurs. For the ex-post analysis, a simplified empirical application for Hungary illustrates the practical potential of the model.

Open Access: Yes

DOI: 10.1080/09535314.2025.2539721

Role of economic complexity and technological innovation for ecological footprint in newly industrialized countries: Does geothermal energy consumption matter?

Laszlo Vasa Yuriy Bilan Beata Zofia Filipiak Muhammad Adnan Bashir Zhao Dengfeng

Publication Name: Renewable Energy

Publication Date: 2023-11-01

Volume: 217

Issue: Unknown

Page Range: Unknown

Description:

This research evaluates how energy (geothermal and coal), economic complexity, and technological innovation impact the ecological footprint in newly industrialized countries (NICs), considering the period 1990–2018. The authors employed economic complexity, technological innovation, and ecological footprint as significant considerations instead of standard environmental and economic parameters. The study used cross-sectional augmented distributed lag (CS-ARDL) and the pairwise Dumitrescu-Hurlin (DH) panel causality to consider the dynamic character of the correlation between the Environment and economic activities. The outcomes of the CS-ARDL showed that economic growth and coal energy intensify ecological footprint in both the long and short run. However, CS-ARDL results revealed that geothermal energy consumption, economic complexity, and technological innovation lessen the ecological footprint in NICs in the long and short run. Finally, the DH causality results revealed a unidirectional causality from geothermal, technological innovation, economic complexity, and coal energy use to ecological footprint. This demonstrates that all the exogenous variables have a predicted power on the ecological footprints in NICs. Based on these findings, policy measures to diversify products have the potential to tackle ecological problems.

Open Access: Yes

DOI: 10.1016/j.renene.2023.119059

Process of inversion in fuzzy interpolation model using fuzzy geometry

Suman Das Laszlo T. Koczy Debjani Chakraborty

Publication Name: IEEE International Conference on Fuzzy Systems

Publication Date: 2020-07-01

Volume: 2020-July

Issue: Unknown

Page Range: Unknown

Description:

Fuzzy rule interpolation (FRI) predicts an accountable outcome of a possible course of action in sparse fuzzy rule base system (FRBS). However, in real life, we encounter some situations where the antecedent has to be predicted to obtain a desired consequent of FRBS. In this situation, inverse fuzzy rule interpolation (IFRI) or backward fuzzy rule interpolation (BFRI) is used to get the desired outcome. Here a geometry based inverse fuzzy rule base interpolation (GIFRI) is suggested. The mathematical detail of the proposed method is elaborated and its geometrical interpretation is given with the help of fuzzy geometry. It is to be noted that the proposed method ensures that the inverse of the inverse is the original one.

Open Access: Yes

DOI: 10.1109/FUZZ48607.2020.9177698

Human Dignity in Hungary

István Kukorelli Gergely Deli

Publication Name: Handbook of Human Dignity in Europe

Publication Date: 2019-04-24

Volume: Unknown

Issue: Unknown

Page Range: 393-414

Description:

This chapter is intended to be a critical discussion of the interpretations of human dignity, as well as their changes, relevant for constitutional law in Hungary. The Fundamental Law of Hungary, in force since 1 January 2012, is characterized by a continuation of the previous constitutional situation but also by a departure from it. This is the reason why the analysis covers both the previous Constitution and the related jurisprudence of the Constitutional Court as well as the new Fundamental Law and its interpretation by the Court, in order to give a picture of the situation of human dignity in Hungary. In addition to a mere description, part of the survey will be devoted to the critical assessment of the situation. Thus, readers approaching the problem from a comparative perspective will not only find an overview of the legal text per se (law in books) and its interpretation (law in action) but may also learn about the views of some exponents of Hungarian legal scholarship.

Open Access: Yes

DOI: 10.1007/978-3-319-28082-0_17

Burnout syndrome among Hungarian midwives in 2014 and 2022

Mihály Dió Ibolya Lipienné Krémer József Vitrai Zsuzsanna Soósné Kiss

Publication Name: Orvosi Hetilap

Publication Date: 2023-10-08

Volume: 164

Issue: 40

Page Range: 1592-1599

Description:

Introduction: The healthcare sector is the most studied area of burnout, as the mental health of healthcare workers has a significant impact on the mental health of the people they care for. Objective: The aim of our study was to investigate whether there have been changes in the dimensions of burnout among midwives, and how the relationships between burnout and the individual factors and working conditions that influence it have evolved, using national data from 2014 and 2022. Method: An anonymous, voluntary, questionnaire-based survey of midwives working exclusively in maternity units was conducted using the Maslach Burnout Inventory questionnaire, which measures burnout, and questions on respondents demographic characteristics and working conditions. Multivariate ordinal logistic regression was used to explore associations between burnout and respondent characteristics, and associations were characterized by odds ratios. Results: Among the dimensions of burnout, no change in depersonalization was observed in 2022, but both emotional exhaustion and personal ineffectiveness were significantly more common in 2022 than in 2014. Responses from 224 midwives in 2014 and 152 midwives in 2022 were analyzed. Looking at the influencing factors, higher levels of burnout in 2014 were significantly associated with poorer perceived health, lack of a partner, smoking, shorter time in healthcare, having a job in a larger city, feeling overworked and dissatisfied. In 2022, on the other hand, younger age, smoking, shorter time in healthcare, feeling overworked, dissatisfied and unvalued were associated with higher levels of burnout. Looking at the combined effect of these factors, willingness to attend a health promotion lecture and having a second job also showed a significant effect on burnout in 2022. Discussion: The authors discuss the change in burnout among midwives and the possible reasons for the correlations shown. Conclusion: The results of the first study on burnout among midwives in Hungary show that improving the working conditions of midwives is essential for the functioning of family-friendly midwifery. In addition, to prevent burnout, more emphasis should be placed on the prevention of the risk factors identified in the study in education and training.

Open Access: Yes

DOI: 10.1556/650.2023.32884

Cognitive aspects of agent-based based evacuation simulation

Csaba Hajdu F. Hajdu Rajmund Kuti

Publication Name: 2025 IEEE 16th International Conference on Cognitive Infocommunications Coginfocom 2025

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: 19-24

Description:

Efficient evacuation is an important task, since it can save people's lives. In Hungary, to design evacuation, mostly standardized calculations are used, which take into account, for example, the number and age of the people, but not the human behaviour. Human behaviour can be included in agent-based simulations. In this paper, the evacuation simulation of a classroom taking into account cognitive behaviour like panic and reaction time is presented. Moreover, based on the cognitive aspects of agent-based simulations, a new architecture is proposed, which can be used to further develop the presented simulations.

Open Access: Yes

DOI: 10.1109/CogInfoCom66819.2025.11200742

Water Droplet Collison and Erosion on High-Speed Spinning Wheels

Ibolya Zsoldos Richárd Takács Dániel Szentendrei

Publication Name: SAE International Journal of Engines

Publication Date: 2024-04-04

Volume: 17

Issue: 5

Page Range: Unknown

Description:

The water droplet erosion (WDE) on high-speed rotating wheels appears in several engineering fields such as wind turbines, stationary steam turbines, fuel cell turbines, and turbochargers. The main reasons for this phenomenon are the high relative velocity difference between the colliding particles and the rotor, as well as the presence of inadequate material structure and surface parameters. One of the latest challenges in this area is the compressor wheels used in turbochargers, which has a speed up to 300,000 rpm and have typically been made of aluminum alloy for decades, to achieve the lowest possible rotor inertia. However, while in the past this component was only encountered with filtered air, nowadays, due to developments in compliance with tightening emission standards, various fluids also collide with the spinning blades, which can cause mechanical damage. One such fluid is the condensed water in the low-pressure exhaust gas recirculation channel (LP-EGR) formulated at cold starts and low-speed high load conditions. This kind of design has been developed to reduce nitrogen oxide emissions and is used in both gasoline and diesel engines. This article presents a state-of-the-art review of this WDE process, focusing on the formation of the condensed water before the compressor wheel, summarizing the influencing factors of WDE and the effects of the damage including using component testbench experiences and simulation methodologies. Inspection possibilities such as high-speed camera measurement and vibration analysis are also an important part of the document.

Open Access: Yes

DOI: 10.4271/03-17-05-0037

Analysis of Hamacher power aggregation operators for circular complex p, q-quasirung orthopair fuzzy 2-tuple linguistic sets and their application in green industry development

Dragan Pamucar Khizar Hayat Zeeshan Ali Zeeshan Ali

Publication Name: Heliyon

Publication Date: 2024-09-15

Volume: 10

Issue: 17

Page Range: Unknown

Description:

Green industry development focuses on balancing economic and financial growth with environmental stewardship and ensuring that companies and industries are contributing positively to both environmental sustainability and prosperity. This manuscript aims to develop the novel technique of circular complex p, q-quasirung orthopair fuzzy 2-tuple linguistic (CCp, q-QOF2-TL) set and their operational laws based on algebraic t-norms and Hamacher t-norms, where the algebraic t-norms and Einstein t-norms are the special cases of the Hamacher t-norms for parameter ϜℲs=l and ϜℲs=2. Further, we derive the Hamacher power aggregation operators based on any finite collection of CCp, q-QOF2-TL numbers (CCp, q-QOF2-TLNs), called CCp, q-QOF2-TL Hamacher power average (CCp, q-QOF2-TLHPA) operator, CCp, q-QOF2-TL Hamacher power weighted average (CCp, q-QOF2-TLHPWA) operator, CCp, q-QOF2-TL Hamacher power geometric (CCp, q-QOF2-TLHPG) operator, CCp, q-QOF2-TL Hamacher power weighted geometric (CCp, q-QOF2-TLHPWG) operator, and described their basic properties, called idempotency, monotonicity, and boundedness. Further, we demonstrate the technique of multi-attribute decision-making (MADM) problem based on the above operators to evaluate the major factor that will be playing in the development of the green industry. Finally, we compare the proposed ranking values with the obtained ranking values of existing techniques to show the supremacy and superiority of the initiated approaches.

Open Access: Yes

DOI: 10.1016/j.heliyon.2024.e36799