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Publications - 6383

A new assessment methodology for fair-faced concrete surfaces based on digital image processing

András Horváth Kitti Karolyfi F. Papp

Publication Name: Fib Symposium

Publication Date: 2020-01-01

Volume: Unknown

Issue: Unknown

Page Range: 288-295

Description:

Fair-faced concrete elements have become even more popular in architecture because of their pure aesthetics and favourable material properties. The europian standards and guidelines are usually specifying four classes regarding to the surface quality. However, the strandard assessment methodologies are based only on manual methods and they are very subjective in some cases. In order to increase the efficiency and accuary of the evaluation a new methodology is proposed using digital image processing. In this paper the basis of the evaluation method made by using the Python 3.6 software is presented by focusing on the surface void ratio which is one of the most common surface defects of fair-faced concrete structures.

Open Access: Yes

DOI: DOI not available

The role of community currencies in strengthening of local identity

Eszter Szemerédi

Publication Name: Civil Szemle

Publication Date: 2020-01-01

Volume: 17

Issue: 2

Page Range: 37-58

Description:

What kind of role could complementary and community currencies play in the strengthening of community cohesion and territorial identity? How can these systems help to reshape and re-evaluate local identity? Through answering these questions the study seeks to prove, that a functioning local community currency system can enhance cohesion among the local community members and can contribute to the strengthening of territorial identity, consequently to the success of a region. The study provides a literature review and references some international studies related to the topic, it also reviews Hungarian examples, highlighting the Rigac, the community currency of Alsómocsolád. The author analyses the documentation of Hungarian complementary currencies and the results from a survey of Rigac users. The results indicate that a complementary currency can strengthen and mobilize the network of local actors through the values it represents (local identity, institutionalization of cooperation, empowerment of the local community, etc.). It can serve as a staple that unites community members. If the system is successful, it can reinforce the sense of belonging and the pride it brings in its members. Based on research findings the study considers the alsómocsoládi Rigac as the most successful Hungarian example of strengthening the local community and local identity through a community currency system.

Open Access: Yes

DOI: DOI not available

A regularized multi-level technique for solving potential problems by the method of fundamental solutions

Csaba Gáspár

Publication Name: Engineering Analysis with Boundary Elements

Publication Date: 2015-06-03

Volume: 57

Issue: Unknown

Page Range: 66-71

Description:

The method of fundamental solutions is investigated in the case when the source points are located along the boundary of the domain of the original problem and coincide with the collocation points. The appearing singularities are eliminated by several techniques: by using approximate but continuous fundamental solutions (regularization) and via auxiliary subproblems to avoid the stronger singularities that appear in the normal derivatives of the fundamental solution (desingularization). Both monopole and dipole formulations are investigated. A special iterative solution algorithm is presented, which converts the original (mixed) problem to a sequence of pure Dirichlet and pure Neumann subproblems. The pure subproblems can be handled efficiently by using conjugate gradients. The efficiency is significantly increased by embedding the resulting method in a natural multi-level context. At the same time, the problem of the use of highly ill-conditioned matrices is also avoided.

Open Access: Yes

DOI: 10.1016/j.enganabound.2014.05.002

Working While Studying Abroad: Cultural Embeddedness of International Students’ Employment in Hungary

Judit Glavanits József Pingitzer

Publication Name: Social Sciences

Publication Date: 2026-03-01

Volume: 15

Issue: 3

Page Range: Unknown

Description:

Student employment has become an increasingly common feature of higher education, yet research on international students has predominantly approached paid work as an economic necessity. This article examines student employment as a culturally embedded social practice among international students in Hungary, focusing on employment patterns and cultural value orientations. The study applies a mixed-methods design, combining a focus group interview with an online questionnaire survey conducted among international students at a Hungarian university (N = 61). Cultural value orientations were measured using Hofstede’s Values Survey Module, and differences between working and non-working students were analyzed using inferential statistical methods. The results show that international students’ employment is dominated by flexible, low-entry-threshold jobs, particularly platform-based delivery work, while study-related or professional positions remain less common and are associated with higher income levels. Employment participation was significantly related to gender and academic year, with male students and those in higher years of study being more likely to work. Regarding cultural value orientations, a statistically significant difference between working and non-working students emerged only along the masculinity–femininity dimension, with working students displaying more performance-oriented values. The findings highlight that international student employment is associated with both structural constraints and culturally grounded value orientations.

Open Access: Yes

DOI: 10.3390/socsci15030192

Overview of XBRL Taxonomy Usage for Structured Sustainability Reporting in European Filings

Árpád Tóth Alex Suta Péter Molnár Bence Lukács Loránd Kedves Orsolya Pintes

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 577-582

Description:

The increasing requirement for businesses to disclose sustainability information digitally has prompted significant changes in the content and format of Environmental, Social, and Governance (ESG) disclosures. However, companies mandated to adapt to these changes face technological and information challenges regarding ‘what’ and ‘how’ to report. For European filers, the Corporate Sustainability Reporting Directive (CSRD) and its requirements, the European Sustainability Reporting Standards (ESRS), along with the International Financial Reporting Standards (IFRS S1 and S2), propose the use of the eXtensible Business Reporting Language (XBRL) as the anticipated technical solution for the digital data structure. The objective of this paper is to provide a methodological framework for effectively navigating the complex and interrelated concepts relevant to stakeholders. Rather than relying on cumbersome textual guides, this framework leverages an examination of existing taxonomies to offer readers insights into the essential glossary of disclosures and metrics considered crucial by official regulatory sources. Furthermore, the research discusses the emphasis on qualitative and narrative disclosures in ESG reporting and their feasibility of comparable results. Employing this methodology facilitates the implementation of corporate case studies and enables the analysis of mass amounts of future annual reports for comprehensive sustainability performance measurement.

Open Access: Yes

DOI: 10.3303/CET23107097

A population based metaheuristic for traveling salesman type problems

Péter Földesi Boldizsár Tüű-Szabó László T. Kóczy

Publication Name: 2017 International Conference on Fuzzy Theory and Its Applications Ifuzzy 2017

Publication Date: 2017-03-09

Volume: 2017-November

Issue: Unknown

Page Range: 1-5

Description:

In this paper we present a metaheuristic method, called DBMEA. It combines the bacterial evolutionary algorithm with local search techniques. Based on our test results it can be used for solving efficiently more discrete optimization problems. The algorithm was tested on Traveling Salesman Problem and Traveling Repairman Problem (TRP) benchmark instances found in the literature. In the case of TSP the DBMEA algorithm produced optimal or near-optimal solutions for all tested instances. Although the most efficient TSP solver method, the Helsgaun's Lin-Kernighan heuristic was faster than DBMEA, but in the case of DBMEA the runtime was more predictable than it the case of other methods. In the case of TRP the results are competitive in terms of accuracy and runtimes with the state-of-the art methods. Except two instances our algorithm found the best-known solutions, and for the biggest tested instance it found new best solution. The runtime was on average 30% faster than the most efficient heuristic in the literature.

Open Access: Yes

DOI: 10.1109/iFUZZY.2017.8311797

Effects of soil compaction on cereal yield: A review

G. Milics A. J. Kovács A. Nyéki M. Neményi

Publication Name: Cereal Research Communications

Publication Date: 2017-03-01

Volume: 45

Issue: 1

Page Range: 1-22

Description:

This paper reviews the works related to the effect of soil compaction on cereal yield and focuses on research of field experiments. The reasons for compaction formation are usually a combination of several types of interactions. Therefore one of the most researched topics all over the world is the changes in the soil's physical and chemical properties to achieve sustainable cereal production conditions. Whether we are talking about soil bulk density, physical soil properties, water conductivity or electrical conductivity, or based on the results of measurements of on-line or point of soil sampling resistance testing, the fact is more and more information is at our disposal to find answers to the challenges. Thanks to precision plant production technologies (PA) these challenges can be overcome in a much more efficient way than earlier as instruments are available (geospatial technologies such as GIS, remote sensing, GPS with integrated sensors and steering systems; plant physiological models, such Decision Support System for Agrotechnology Transfer (DSSAT), which includes models for cereals etc.). The tests were carried out first of all on alteration clay and sand content in loam, sandy loam and silt loam soils. In the study we examined especially the change in natural soil compaction conditions and its effect on cereal yields. Both the literature and our own investigations have shown that the soil moisture content changes have the opposite effect in natural compaction in clay and sand content related to cereal yield. These skills would contribute to the spreading of environmental, sustainable fertilizing devoid of nitrate leaching planning and cereal yield prediction within the framework of the PA to eliminate seasonal effects.

Open Access: Yes

DOI: 10.1556/0806.44.2016.056

Vulnerability Assessment of Levee Failure Due to Underseepage in the Szigetköz Floodplain Area

Edina Koch Richard P. Ray

Publication Name: Water Switzerland

Publication Date: 2026-03-01

Volume: 18

Issue: 5

Page Range: Unknown

Description:

Analysis of the likelihood of structural or hydraulic failures of levees is a crucial part of flood risk assessment and is affected by many uncertainties. This paper evaluates a critical area along the Danube River in the Szigetköz floodplain, where hydraulic risk has been increasing due to rising flood levels. Blanket theory approaches demonstrated the probability of failure relative to erosional failure, and Monte Carlo simulations generated fragility curves. The results of the case study show that the thickness of the aquifer layer has a slight effect if it is deeper than 30 m. The research also reveals that the probability of failure is highly affected by the distance from the river to the riverside levee toe; the shorter this distance, the higher the hydraulic risk. Sensitivity analyses emphasize the effect of variable inhomogeneity; as the leakage factor increases, the probability of failure due to underseepage increases. Comparing coefficients of variation across different floodwater levels showed that at low floodwater levels, a lower coefficient of variation corresponds to a lower probability of failure. In contrast, at higher floodwater levels, the same coefficient produced a higher probability of failure.

Open Access: Yes

DOI: 10.3390/w18050634

Optimal design of a magneto-rheological clutch

Dávid Törocsik P. Horváth

Publication Name: Mechatronics Recent Technological and Scientific Advances

Publication Date: 2011-01-01

Volume: Unknown

Issue: Unknown

Page Range: 89-93

Description:

Appliances using magneto-rheological fluid (MRF) can find application in shock absorbers, brakes and clutches. Until now the spread of MRF clutches was limited by the moderate torque they can transmit. This paper summarizes the factors influencing the torque transmitted. During the design process of a prototype MRF clutch its most important geometric data have been determined by means of simulation of the magnetic circuit.

Open Access: Yes

DOI: 10.1007/978-3-642-23244-2_11