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Publications - 6374

Effects of Reprocessing on Surface Oxidation and Microstructural Composition in Metal Injection-Molded Materials: Insights from SEM, EDX, and Metallographic Analysis †

Zoltán Weltsch Ferenc Tajti György Ledniczky Sándor Marokházi

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

This paper explores the evolving significance of metal injection molding (MIM) technology, particularly as a promising alternative for the precise and cost-effective manufacturing of small-scale, high-volume products in the automotive industry. Despite its growing adoption, the quality control processes for intermediate “green” parts and the final metal products are not yet well established, posing significant challenges in ensuring product reliability and consistency. Furthermore, the research thoroughly examines the recycling of MIM feedstock and its impact, especially on the change in carbon content. Scanning Electron Microscopy (SEM) images were taken of the samples, the chemical composition was analyzed using Energy-Dispersive X-ray Spectroscopy (EDX), and the pearlitic regions of samples from different generations were compared using image analysis software on microscopic cross-sections.

Open Access: Yes

DOI: 10.3390/engproc2024079009

The Transformation of Digital Culture and Learning Habits in Higher Education, Digital Methods and Tools

Mónika Rajcsányi-Molnár Attila Pongracz István András Jozsef Cserko Anikó Benyák Gyorgy Molnar

Publication Name: Cando EPE 2024 Proceedings IEEE 7th International Conference and Workshop Obuda on Electrical and Power Engineering

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 109-113

Description:

The rise of digital culture has fundamentally changed the way people learn in higher education. Online platforms, digital learning materials and various e-Iearning tools have become commonplace, significantly changing traditional learning methods. Access to information for students has never been easier: online courses, interactive videos and webinars allow flexible and personalised learning. At the same time, learners are moving from being passive recipients to active participants, as the use of interactive content and collaborative learning tools becomes more widespread. Digital methods offer new ways of acquiring and processing knowledge. Tools such as virtual reality (VR), artificial intelligence (AI)-based tutors and gamification-enhanced learning systems increase motivation and allow for a more personalised approach to learning materials. Higher education institutions are also increasingly open to innovation, with the introduction of online learning platforms and hybrid teaching models gaining ground. Through this transformation, higher education is no longer limited to classroom learning but is becoming a global process in the digital space. Our article explores these issues using our concrete tacit knowledge and experiences from higher education courses.

Open Access: Yes

DOI: 10.1109/CANDO-EPE65072.2024.10772883

Benefit evaluation model for gamified add-ons in business software

Ferenc Erdos Gábor Kallos

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2014-01-01

Volume: 11

Issue: 5

Page Range: 109-124

Description:

Return on IT investment analysis has become a fundamental task of the finance function at corporations, let it be large multinational organizations or small and medium businesses (SME). Besides the cost analysis, the benefit analysis is also an essential component of economic calculations and decisions. Due to complicated profit calculations and estimation methods, the benefit of IT investments is less easily forecast and hence less frequently calculated than their costs. This study focuses on a special innovative type of IT investments, the gamified extensions of business software. Gamification, which refers to the use of game design elements in a non-gaming context, can expect big development in the field of business applications in the near future. Gamification features of business software generally enhance user experience, enabling people to do otherwise boring tasks. In the following we attempt to propose a sophisticated benefit evaluation model based on the hedonic wage model (HWM) and technology acceptance model (TAM) for this special type of IT projects.

Open Access: Yes

DOI: DOI not available

Examination of formability of cast aluminium alloy

Erno Halbritter Ágnes Csizmazia

Publication Name: Materials Science Forum

Publication Date: 2003-01-01

Volume: 414-415

Issue: Unknown

Page Range: 15-20

Description:

Ring upsetting has been used to upset AlSi9Cu3 cast alloy in order to examine formability as well as the effect of deformation. Maier scalar quantity, which characterises the stress state, has been calculated. It is concluded that, from the point of view of maximum deformation, ring upsetting tests are more advantageous than simple upsetting tests.

Open Access: Yes

DOI: 10.4028/www.scientific.net/msf.414-415.15

Real-Time IoT Solution to Monitor and Control dMVHR Units in Real-Life Environment

Gusztáv Fekete Albert Zsombor Fekete Ferenc Tolvaly-Roşca István Bíró Zoltán Forgó

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2024-01-01

Volume: 21

Issue: 6

Page Range: 303-322

Description:

This paper presents an up-and-running control system, using IoT hardware, for multiple decentralized mechanical ventilation with heat recovery (dMVHR) units to enhance the overall performance of heat exchangers and the air quality of a real-life environment. The implemented control and monitoring system is able to measure the thermal efficiency of the complete ventilation system under real working conditions. Fan speed is automated based on the measured CO2eq levels in the bedrooms of the building, however, manual control is also possible. Temperature, relative humidity and CO2eq levels can be monitored live on the user’s smart device, while data can be exported through Google cloud system. Data values can be stored and accessed any time by legit users. The thermal efficiency of the individual units and the whole ventilation system was investigated and experimentally verified under real-life conditions, using the implemented centralized control and monitoring system.

Open Access: Yes

DOI: 10.12700/APH.21.6.2024.6.16

Biologia Futura: potential of different forms of microalgae for soil improvement

Zoltán Molnár Tibor Janda Lamnganbi Mutum Vince Ördög

Publication Name: Biologia Futura

Publication Date: 2022-03-01

Volume: 73

Issue: 1

Page Range: Unknown

Description:

Products derived from microalgae have great potential in diverse field. As a part of the enhancing agriculture application, various forms of microalgae applications have been developed so far. They are known to influence soil properties. The various forms of application may enhance soil in more or less similar manner. They can help improve soil health, nitrogen, and phosphorus content, and even carbon sequestration. Thus, overall, it can enhance fertility of the soil.

Open Access: Yes

DOI: 10.1007/s42977-021-00103-2

At the Borderline of Public and Private Law: The Restitution of Cultural Property Held in Public Collections in Hungary

Vanda Vadász Viktória Verebélyi

Publication Name: Santander Art and Culture Law Review

Publication Date: 2024-01-01

Volume: 2024

Issue: 2

Page Range: 181-208

Description:

During the Second World War, and thereafter until the end of the communist regime in 1989, a massive amount of private-ly owned works of art came into the possession of the Hungarian state. The ownership of the property thus collected was only par-tially clarified after the war. After the fall of communism, national-ized cultural property was subject to restitution laws, but restitution typically meant partial compensation. The aim of this article is to highlight the shortcomings that still characterize the restitution of cultural property held in public collections in Hungary. After summa-rizing the historical-legal situation pertaining to restitution measures in Central and Eastern Europe, we provide a comprehensive overview of the Hungarian legal environment in terms of restitution. The focus is on the restitution rules adopted in the 2010s that were intended to settle the possession of cultural property held in public collections. The roots of constitutional issues related to the regulation arise from and are reflected in the intermingling of private law and public law characteristics and guarantees. In the presentation of civil law disputes concerning the ownership rights of property held in public collections, we outline the characteristics of the Hungarian regula-tory framework regarding protected cultural property and the issues arising from their application. Finally, we provide an overview of the European Court of Human Rights’ jurisprudence on the protection of property rights and an assessment of Hungarian regulations before the Court. We claim that the lack of predictability and certainty of the latter authority’s proceedings may lead to human rights issues.

Open Access: Yes

DOI: 10.4467/2450050XSNR.24.017.20828

Airline performance assessment using an improved neutral cross-efficiency method: principal component analysis through Q-methodology

Peiman Ghasemi Erfan Babaee Tirkolaee Samaneh Jamshidi Bandari Seyedreza Seyedalizadeh Ganji Samaneh Jamshidi Bandari Vladimir Simic

Publication Name: Transportation Research Interdisciplinary Perspectives

Publication Date: 2025-11-01

Volume: 34

Issue: Unknown

Page Range: Unknown

Description:

Assessing the performance of airlines is vital in the aviation industry, as it affects multiple stakeholders, including airlines, travelers, regulatory authorities, and investors. It is known as a key driver of growth and sustainability in the aviation sector. Hence, the main aim of the current study is to utilize the Principal Component Analysis (PCA) through Q-methodology within the Neutral Cross Efficiency Method (referred to as QNCEM) as an innovative technique to provide an assessment framework for airlines. QNCEM offers policymakers numerous advantages as it permits the elimination of irrelevant perspectives during the assessment process, enables the determination of each Decision-Maker’s (DM) contribution, and plays a crucial role in achieving consensus by leveraging factor analysis to extract perspectives that are representative of the group’s opinions. In this research, the efficiency of 17 Iranian airlines is assessed using QNCEM, considering both desirable and undesirable outputs, such as flight delays, demonstrating its practicality and effectiveness. The selection of a loading factor of 0.626 allowed QNCEM to encompass a comprehensive range of viewpoints from 17 DMs. This deliberate choice ensures the inclusion of a diverse set of perspectives, maximizing the richness of the analysis and explaining a cumulative variance of more than 96%.

Open Access: Yes

DOI: 10.1016/j.trip.2025.101768

Why are the participation rates in lifelong learning so low in Hungary?

Péter Róbert Saida Ayupova Szilvia Altorjai

Publication Name: Lifelong Learning in Europe National Patterns and Challenges

Publication Date: 2013-01-01

Volume: Unknown

Issue: Unknown

Page Range: 280-303

Description:

No description provided

Open Access: Yes

DOI: 10.4337/9780857937360.00020