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Publications - 6374

Extracting LPV and qLPV structures from state-space functions: A TP model transformation based framework

Péter Baranyi

Publication Name: IEEE Transactions on Fuzzy Systems

Publication Date: 2020-03-01

Volume: 28

Issue: 3

Page Range: 499-509

Description:

This paper proposes a tensor product (TP) model transformation-based framework requiring minimal human intuition to numerically reconstruct linear time invariant, Takagi-Sugeno (T-S) fuzzy model-based linear parameter varying and quasi-linear parameter varying representations of state-space models. The proposed framework facilitates the manipulation of the structure of the system matrix, the parameter vector - including state elements - and the vertex systems. The motivation behind this capability is that all of these structural components strongly influence the control design and the resulting control performance. An important feature of the framework is that it is agnostic towards the formulation of the state-space model, i.e., whether it is given using soft-computing-based techniques or closed formulae. The proposed approach is an extension of the TP model-based control design framework and inherits all of its advantageous properties, e.g., it can be easily used to find minimal representations, including the higher order singular value-based canonical form, and it supports the clear formulation of complexity/accuracy tradeoffs and allows for conversions to various types of convex representations, making for a flexible way to manipulate the weighting and antecedent functions. This paper gives examples to show how the framework can be used in a routine-like fashion and to highlight how it can be applied to the problem of finding useful T-S fuzzy model variations of a given model.

Open Access: Yes

DOI: 10.1109/TFUZZ.2019.2908770

Light-blooded, blood-fumed and blood-rich: Cultural conceptualizations of vér 'blood' in Hungarian

No authors available

Publication Name: Language, Heart, and Mind: Studies at the intersection of emotion and cognition

Publication Date: 2020-06-29

Volume:

Issue:

Page Range: 139-160

Description:

One of the key issues of recent linguistic trends is to understand the interface between language, culture and human body. The study of the figurative usage of body part and bodily fluid terms unveils cross-cultural specificities of how they are applied to various aspects of life. Anthropologist Victor Turner considers 'blood' a dominant ritual symbol, which highlights its abundant symbolism in Western and non-Western traditions. Employing a Cultural Linguistic framework, the research proposes the basic cultural conceptualizations of vér 'blood' in the Hungarian language, based on phrases that have been collected from various dictionaries and complemented by data extracted from the Hungarian National Corpus. According to the findings, the underlying conceptualizations include death/fight, kinship, human nature, life force, emotion and intensity, where expressions that convey the meaning of intensity derive from more than one conceptualization. It is further pointed out that numerous phrases are culturally constructed and related to cultural beliefs, events and rites such as blood-brotherhood (vérszerzodés 'blood-contract'), duels (elso vérig 'until first blood'), the Medieval theory of four humours (bovérd 'plentiful-blooded'), or the folk belief related to vampires (vérét szívja 'suck his blood').

Open Access: No

DOI: DOI not available

Active citizenship and civic competencies in the Hungarian City of győr

Adrienn Reisinger Daniel Robert Szabo Norbert Kovács

Publication Name: Citizenship Teaching and Learning

Publication Date: 2020-03-01

Volume: 15

Issue: 1

Page Range: 5-23

Description:

This article is based on the premise that participatory democracy needs active citizens, and active citizens need civic competencies. The goal of this study is to illustrate previous research into active citizenship and civic competencies and to add the own concept of the authors to the literature. The article also provides empirical results from a survey into active citizenship carried out among citizens in Győr, Hungary, 2017. A total of 254 citizens filled out the online and offline questionnaire. The survey sample methods included random and snowball sampling. The sample does not represent the population of Győr, 64.3 per cent were women and about half of the sample were graduate citizens, so the results can be interpreted only to the respondents. Results offer an insight into what citizens think of the concept of active citizenship and which civic competencies they regard as important active participation in society. The article also demonstrates guidance for practitioners and researchers and it adds to the literature on active citizenship. It is possible to believe that knowing what kind of civic competencies people need could be useful to know how to be more active in the society.

Open Access: Yes

DOI: 10.1386/ctl_00017_1

Cooperative learning in VR environment

Viktória Kövecses-Gősi

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2018-01-01

Volume: 15

Issue: 3

Page Range: 205-224

Description:

Nowadays it is increasingly visible that a change in the approach is needed in the field of education, thus we should move from “traditional” educational methods towards experience-oriented and cooperative teamwork-based education which considers the characteristics of the digital generation. After the brief demonstration of the methodological characteristics and the principles of digital culture, the present study aims to introduce how a lesson built on the improvement of different intelligence levels through cooperative techniques can be implemented with the help of virtual space, what opportunities are provided by the MaxWhere program for planning and organising teamwork and for supporting learning.

Open Access: Yes

DOI: 10.12700/APH.15.3.2018.3.12

Quality Education and Digitalization Efforts, the Catalysts of Sustainable Development

Márta Konczos Szombathelyi Viktória Kövecses-Gősi Zita Kaszalik

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 601-606

Description:

Education, science, technology, research and innovation are the supporting tools of the European Union's Sustainable Development 2030 program. They are valuable elements in themselves, the priority of which cannot be doubted, since they act as catalysts. What should be the direction to follow with the help of these factors in order to preserve competitiveness within the framework of sustainability? The solution is a factor affecting the lives of all of us. The world of business, education and this resent are trying to find a solution to this challenge. Sustainable development is a priority goal of the internal and external policies of the European Union, among the 17 Sustainable Development Goals (SDGs), the member states undertake to implement quality education and develop digital competence. The Erasmus+ education and training EU (European Union) programs help to overcome the differences between Member States and regions.

Open Access: Yes

DOI: 10.3303/CET23107101

Experimental and numerical investigation of the single-point incremental forming of aluminium alloy foils

Imre Paniti Sherwan Mohammed Najm Dóra Harangozó Zsolt János Viharos

Publication Name: Acta Imeko

Publication Date: 2020-03-01

Volume: 9

Issue: 1

Page Range: 25-31

Description:

Single-Point Incremental Forming (SPIF) is a flexible process for manufacturing sheet metal parts that is well adapted and profitable for prototypes or small batch production. Compared to traditional sheet forming technologies, this relatively slow process can be used in different applications in the automotive and aircraft industries; architecture engineering; and medical aid manufacture. In this article, the indirectly obtained axial forming force on the SPIF of variable wall angle geometry is studied using different process parameters. The estimation of the forces on AlMn1Mg1 sheets with an initial thickness of 0.22 mm is performed by continuous monitoring of servomotor currents. The deformation states of the formed parts were analysed using the ARGUS optical strain measurement system of GOM, while the roughness measurements were carried out by a Mitutoyo system. Some initial finite element analysis simulations and a crack monitoring method together with an interaction plot of forming speed, incremental depth, tool diameter, and lubrication were also reported.

Open Access: Yes

DOI: DOI not available

Structural components of lifestyle and beyond: The case of Hungary

Péter Róbert Tamás Keller

Publication Name: Studies of Transition States and Societies

Publication Date: 2011-06-01

Volume: 3

Issue: 1

Page Range: 55-75

Description:

This paper deals with the question of when and how lifestyle and its components are important in social stratifi cation. There is considerable consensus among scholars about the structure of the society being a consequence of hierarchical dimensions like occupation, income, or wealth. Some thirty years ago, largely based on Bourdieu's "Distinction", a new paradigm emerged highlighting the lifestyle components and the value-oriented cultural and material consumption in stratifi cation. The idea refl ects the empirical fi nding that inequality between social classes has largely decreased, giving priority to horizontal lifestyle diff erentiation instead of vertical inequality dimensions. From a theoretical viewpoint, a challenge in the approach is fi nding out to what extent lifestyle typology is of a non-vertical character in reality. This social determination of lifestyle is investigated for Hungary when comparing an occupation-based typology with a consumption-based one. On the one hand, results reveal that the Effects of structural components on social status are stronger than those of lifestyle. On the other hand, lifestyle turns out to be less independent of social position and the top and bottom levels of the lifestyle typology are particularly predictable by structural measures.

Open Access: Yes

DOI: DOI not available

Special Issue: Exploring Abiotic Stress in Plants—Mechanisms, Adaptations, and Mitigation Strategies

Tarek Alshaal

Publication Name: International Journal of Molecular Sciences

Publication Date: 2026-03-01

Volume: 27

Issue: 5

Page Range: Unknown

Description:

No description provided

Open Access: Yes

DOI: 10.3390/ijms27052182

Vibration levels of stacked automotive engine rack in truck shipments as a function of vehicle speed and road condition

Péter Böröcz

Publication Name: Journal of Testing and Evaluation

Publication Date: 2020-01-29

Volume: 49

Issue: 1

Page Range: Unknown

Description:

In the past three decades, there has been a tremendous global shift in the use of returnable or reusable packaging in the automotive industry. This article focuses on the physical vibration forces that occur in a very important type of package system designed for engines and transmissions, namely the steel racks that have vertical posts on the four vertical edges that allow higher return ratios when empty. Engines and transmissions require zero damage acceptance levels today, as they are mated at the end of the assembly process, and they need to function 100 % of the time as the vehicle rolls off the finish line. They also are the most expensive components of the vehicle. This study was conducted to investigate the vibration environment of the stacked engine rack during truck transportation with various truck speeds, road conditions, and other road characteristics, such as speed bumps and railway crossings. Triaxial acceleration data were collected both on the truck floor as well as on the stacked racks themselves to determine the differences of vibration levels from truck floor to the stacked rack where vibration intensity increased. This study found that there were significant vibration severities in the stacked racks in all three orientations.

Open Access: Yes

DOI: 10.1520/JTE20180782