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Found 6374 publications

Improved control performance of the 3-DoF aeroelastic wing section: a TP model based 2D parametric control performance optimization

Alexandra Szollosi Péter Baranyi

Publication Name: Asian Journal of Control

Publication Date: 2017-03-01

Volume: 19

Issue: 2

Page Range: 450-466

Description:

Based on the most recent Tensor Product model transformation solutions, the paper presents an improved control performance for the most recent version of the three Degree of Freedom aeroelastic wing section model including Stribeck friction, according to signals pitch, plunge, trailing edge and control value, based on practical engineering criteria such as overshoot, undershoot, signal end values and settling time. This is achieved through proposing a novel two dimensional parametric convex hull manipulation based method for Tensor Product model transformation based Control Design Frameworks. The approach provides two TP model representations for the different requirements of the controller and observer of a given model, opening the possibility to utilize the TP model transformation's convex hull manipulation potential in control performance optimization for a separate optimization of the two TP model representations. Numerical simulation results are provided to illustrate the control performance improvements of the aeroelastic wing section model through the proposed 2D parametric convex hull manipulation based design method.

Open Access: Yes

DOI: 10.1002/asjc.1418

Sustainable travel to school programs in Hungary Role of Pedibus and Bicibus pilot programs today

Petra Kinga Kézai

Publication Name: Civil Szemle

Publication Date: 2024-03-21

Volume: 21

Issue: 1

Page Range: 71-88

Description:

In the context of modern urban development, various socio-technical innovations have proliferated in response to urban challenges, offering well-defined solutions. Since the 1970s, the so-called ‚backseat generation’, a group of children whose parents drive them to school every day, has emerged in developed countries, particularly in urban areas. This phenomenon has many negative effects on children, the environment and urban spaces. The present study addresses the issue of urban transport management, in particular the issue of daily school transport. It aims to present, based on literature analysis, good international examples, such as the pedibus and the bicycle bus, which emphasise local values and resources in the light of the ‚slow city’ concept. The study concludes with a presentation and evaluation of the pilot programmes (Pedibus in Gödöllő and Bicibus in Pécs) that have also become established in Hungary in recent years. These programmes offer a supervised, safe, group-based solution for school children and their families to go to school, and build community between different generations.

Open Access: Yes

DOI: 10.62560/csz.2024.01.05

Hygrothermal simulations and in-situ measurements of ultra-lightweight concrete panels

Máté Orosz Balázs Nagy Elek Tóth

Publication Name: Pollack Periodica

Publication Date: 2017-12-01

Volume: 12

Issue: 3

Page Range: 69-83

Description:

The aim of the paper is to investigate the hygrothermal properties of a newly developed building panel, made of ultra-lightweight concrete, encased cold-formed steel elements. It describes the hygrothermal simulations of the wall and roof panels, and based on results, the heat transfer coefficients and linear thermal transmittances are determined. The hygrothermal behavior of main structural joints (wall corner, wall-roof and wall-ground connections) is also simulated using real indoor and outdoor conditions. For validating the results, a model building was investigated.

Open Access: Yes

DOI: 10.1556/606.2017.12.3.7

Two-Stage Learning Based Fuzzy Cognitive Maps Reduction Approach

Miklós F. Hatwágner M. Furkan Dodurka Elpiniki I. Papageorgiou Leon Urbas Laszlo T. Koczy Engin Yesil

Publication Name: IEEE Transactions on Fuzzy Systems

Publication Date: 2018-10-01

Volume: 26

Issue: 5

Page Range: 2938-2952

Description:

In this study, a new two-stage learning based reduction approach for fuzzy cognitive maps (FCM) is introduced in order to reduce the number of concepts. FCM is a graphical modeling technique that follows a reasoning approach similar to the human reasoning and the decision-making process. The FCM model incorporates the available knowledge and expertise in the form of concepts and in the direction and strength of the interactions among concepts. One of the modeling problems of FCMs is that oversized FCM models suffer from interpretability problems. An oversized FCM may contain concepts that are semantically similar and affect the other concepts in a similar way. This new study introduces a two-stage model reduction approach, and both static and dynamic analyses are considered without losing essential information. In the first stage, the number of concepts is reduced by merging similar concepts into clusters, whereas in the second stage the transformation function parameters of concepts are optimized. In order to show the benefit of using the proposed reduction approach, two sets of studies are conducted. First, a huge set of synthetic FCMs are generated, and the results of these statistical analyses are presented via various tables and figures. Subsequently, suggestions to the decision makers are given. Second, experimental studies are also presented to show the decision parameters and procedure for the proposed approach. The results show that after using the concept reduction approach presented in this study, the interpretability of FCM increases with an acceptable amount of information loss in the output concepts.

Open Access: Yes

DOI: 10.1109/TFUZZ.2018.2793904

Effects of Local Soil Profiles on Seismic Site Response Analysis

Ayele Tesema Chala R. P. Ray

Publication Name: Periodica Polytechnica Civil Engineering

Publication Date: 2024-03-18

Volume: 68

Issue: 2

Page Range: 403-410

Description:

Local soil conditions play a significant role in the intensity variations of seismic waves during earthquakes. These variations can be either amplified or de-amplified depending on the specific soil conditions. This study aimed to assess the impact of different soil profiles on seismic site responses. The study considered four types of site profiles: sand (Sa), clay (Cl), sand overlying clay (SaCl), and clay overlying sand (ClSa) profiles. To simulate the ground motion, we selected seven sets of strong earthquake records from the European Strong-Motion Database. These records were selected according to Eurocode-8 with a peak ground acceleration (PGA) of 0.24 g, site class A using REXEL computer program. The records were then applied to the bedrock at a depth of 30 meters. Subsequently, a series of 1-D equivalent linear (EQL) response analyses were performed using the STRATA. Amplification factors (AFs) and surface acceleration time histories provided quantitative evaluations for our analysis results. The results demonstrated that site profiles with clay overlying bedrock (SaCl and Cl profiles) exhibited higher seismic amplification and peak ground acceleration in comparison to site profiles with sand overlying bedrock (Sa and ClSa profiles). The maximum median AF is calculated from the SaCl site profile, while the minimum median AF was calculated from the ClSa profile. The relative difference between the maximum and the minimum median AFs was about 33.7%. Based on these results, we can conclude that soft local soils have a pronounced effect on the amplification of seismic waves compared to stiff local soils.

Open Access: Yes

DOI: 10.3311/PPci.22148

Synchronistic historical background for Jung-Pauli's modelling of psyche and nature concerning the aquarius myth part II: The aquarius mythologem and representations of St. Andrew in the Hortus Deliciarum

Peter Varlaki Péter Baranyi

Publication Name: 7th IEEE International Conference on Cognitive Infocommunications Coginfocom 2016 Proceedings

Publication Date: 2017-01-03

Volume: Unknown

Issue: Unknown

Page Range: 455-468

Description:

In the paper we attempt to present the same in a very beautiful and uniquely interesting picture of the Hortus Deliciarum, with St. Andrew in the leading role, representing St. John the Baptist. We compare the meaning system and the numerical structure of this the Hortus Deliciarum image to the Pala d'Oro's beautiful and unique enamel of hidden meaning, depicting the presentation of the child Christ in the 'Temple.'. On tha basis of this interpretation and comparison it can be considered as a historical background of the Aquarius mythologem and its Jung-Pauli kinds of imagination and interpretation.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2016.7804590

Self-organising formation of fullerene molecules from graphene patterns

Ibolya Zsoldos István László Dávid Fülep

Publication Name: Iop Conference Series Materials Science and Engineering

Publication Date: 2018-10-18

Volume: 426

Issue: 1

Page Range: Unknown

Description:

The self-organised formation of C60 and C70 from well designed graphene patterns was proved by molecular dynamic simulations. In this paper graphene nanopattern models are shown which can be used for self-organised formations of larger fullerene molecules. The rules of building of the nanopatterns are defined. Examples are shown for the self-organised processes in case of larger fullerene molecules.

Open Access: Yes

DOI: 10.1088/1757-899X/426/1/012011

Diagnostic measurement for the effective performance of motor vehicles with free acceleration

I. Lakatos Péter Ori

Publication Name: 15th Imeko Tc10 Workshop on Technical Diagnostics 2017 Technical Diagnostics in Cyber Physical Era

Publication Date: 2017-01-01

Volume: Unknown

Issue: Unknown

Page Range: 188-193

Description:

Diagnostics means instrumental measurement without dismantling. So measuring the engines on rolling roads is not incorporated in this concept, as this measurement is accomplished on engines taken out from vehicles. During service, it is often necessary to measure the performance of the engines, or to judge the performance projection of some corrections. The new method discussed in this article provides a solution to this problem.

Open Access: Yes

DOI: DOI not available

THE RELATIONSHIP BETWEEN CORPORATE SOCIAL RESPONSIBILITY AND FINANCIAL PERFORMANCE IN THE PRACTICES OF CONVENTIONAL AND ISLAMIC COMMERCIAL BANKS IN THE PAKISTANI BANKING SYSTEM

Csaba Lentner Yahya Khan Szegedi Krisztina Tatay Tibor

Publication Name: Vezetestudomany

Publication Date: 2024-03-14

Volume: 55

Issue: 3

Page Range: 44-57

Description:

The authors’ study explored the incorporation of the CSR concept followed by Western banks into the practice of Islamic-based dual banking. Their empirical research covered the listed commercial banks in Pakistan. They studied the CSR activities and their disclosure in reports of listed commercial banks in Pakistan during the period 2008–2018 and how they affected the financial performance of the banks. The results of the study revealed that the disclosure of CSR increased by an average of 15 percentage during the period under study: from 56.48% to 71.06%. The results of the study confirm that banks that consciously engage in CSR activities and communicate this appropriately achieve better financial performance. However, disclosure of CSR information has no significant impact on the market valuation of listed banks, as measured by Tobin’s Q ratio.

Open Access: Yes

DOI: 10.14267/VEZTUD.2024.03.04