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Found 6289 publications

Systematic Literature Review on Overspending and Sustainable Budgeting: Insights for Hungarian Households

Boglárka Eisingerné Balassa Tímea Vastag

Publication Name: Sustainability Switzerland

Publication Date: 2024-11-01

Volume: 16

Issue: 21

Page Range: Unknown

Description:

This study overviews the keywords overspending, family, and sustainable budget from different perspectives in the existing literature. Its goal is to identify the gap through keyword analysis and formulate a methodological direction for the future, using an overview of the methodologies used for researching individual keywords. This publication is based on a systematic literature review, including articles from the Web of Science, Science Direct, and Scopus databases. The resulting publications are analyzed from several angles, such as the number of publications per keyword per year, which methodologies were applied, and at which level (micro, meso, macro) the topic was previously researched. As an output of the partial analyses, both the lack of research on the sustainable spending habits of Hungarian households and the need for a methodology that can be applied for this purpose emerges. The results enable the development of a combined method, with which current research can be carried out on a micro level regarding sustainable spending habits in Hungary.

Open Access: Yes

DOI: 10.3390/su16219509

Some Actualities and Challenges in Sustainable Beef Cattle Breeding and Husbandry

Judit Márton Ferenc Szabó

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 241-246

Description:

Beef cattle farming is an environmentally friendly food-producing animal husbandry sector that is based largely on pasture and arable by-product feedstuffs. It faces several problems that need to be addressed from a sustainability point of view. Population growth and growing food demand raise concerns about the environmental consequences of expanding beef production using current systems. Consequently, this condition underscores the importance of maintaining an equilibrium between these sustainability pillars and the necessity of adopting more sustainable models. This review article analyzes the most important, recent literary sources dealing with the sustainability of the sector. As a result of the literary synthesis, it has been established that most experts emphasize the two main pillars of sustainability, namely, economic and environmental aspects. The present work directs attention to the third and possible fourth point, the social as well as the cultural aspects of the sustainability of the beef cattle sector, which will be increasingly important to keep in mind in the future.

Open Access: Yes

DOI: 10.3303/CET23107041

Integration of visual programming and artificial intelligence in robotics education: The pedagogical possibilities of the NAO robot

Eniko Nagy Andre Adin Kiss Gyorgy Molnar

Publication Name: Sisy 2025 IEEE 23rd International Symposium on Intelligent Systems and Informatics Proceedings

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: 45-50

Description:

The article examines the educational opportunities offered by the integration of visual programming, artificial intelligence, and robotics for the development of 21st-century skills. It focuses on the use of the NAO humanoid robot, which creates a playful, experience-based learning environment for students. To overcome the difficulties of programming, visual block programming is increasingly being used, which encourages logical thinking and creativity in individuals. The article also presents a web application that allows students to program the NAO robot, while an artificial intelligence-based chat assistant provides real-time support. This integrated approach not only motivates students, but also offers a new perspective on digital pedagogy and personalized learning, which could be a big help in the future in terms of both educational technology and methodology.

Open Access: Yes

DOI: 10.1109/SISY67000.2025.11204876

Application of LPV type force model in vehicle crash dynamics

István Harmati András Rövid Peter Varlaki

Publication Name: Proceedings of the 9th Wseas International Conference on Applications of Computer Engineering Ace 10

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: 174-179

Description:

In the research field of vehicle crash mechanics one of the most important task is finding a model for the deformational force, which gives acceptable approximation, but doesn't need perfect knowledge about the parameters of the vehicle. The FEM based methods, which are applied in the engineering practice give good approximations, but they have extremely large computational complexity and need a large amount of data. On the other hand there exist simple force models, but they not approximate well in details the force-deflection curve. In this paper we introduce a force model for vehicle deformation based on the LPV-HOSVD paradigm, which well approximates the force during the deformational process and has acceptable complexity.

Open Access: Yes

DOI: DOI not available

Observability Conditions for Speed Sensorless Induction Motor Models with Neglected or Included Iron Loss Representation

Krisztian Horvath

Publication Name: International Conference on Electical Drives and Power Electronics

Publication Date: 2021-01-01

Volume: Unknown

Issue: Unknown

Page Range: 97-101

Description:

Iron loss is usually neglected in induction motor models used for speed sensorless control and observer design. Thus, the complexity of control and estimator algorithms are reduced. However, the application of a more accurate model can improve the performance, hence the inclusion of iron loss in the machine model is becoming more widespread. But the effect of iron loss modeling on observability has not been analyzed yet. In this paper, observability conditions are presented for nonlinear state-space models with included iron loss. Furthermore, the results are compared with the observability properties of the traditional models where iron loss is ignored.

Open Access: Yes

DOI: 10.1109/EDPE53134.2021.9604110

Cultural Influence on Sustainability Discourse: A Comparative Analysis of CEO Letters in the Cosmetics and Fashion Industry

Lívia Ablonczy-Mihályka Zsuzsanna Pálffy

Publication Name: Journal of Ecohumanism

Publication Date: 2024-08-03

Volume: 3

Issue: 4

Page Range: 2779-2792

Description:

The national cultural background of a company's founders and managers significantly influences corporate culture and communication. Over the past two decades, the link between culture and sustainability practices has been demonstrated, including how sustai nability embeddedness is reflected in CEO letters. This study examines if companies in the cosmetics and fashion industries reveal cul tural influences on sustainability in their CEO letters. These letters, the most influential part of annual reports, convey the CEO's vision, operations, and performance. Using quantitative and qualitative content analysis, the research investigates whether national culture influences the content of CEO letters by analysing letters from 15 companies across 10 countries. The study found no statistically significant correlation between Hofstede's cultural dimensions and sustainability narratives in CEO letters. However, feminine cultures tend to have stronger sustainability orientations. These findings suggest that companies should adapt their sustainability communication to align with local cultural values, thereby enhancing stakeholder engagement, particularly for multinational beauty and fashion companies.

Open Access: Yes

DOI: 10.62754/joe.v3i4.3796

Simulations of poroelastic materials in a complex acoustic system using frequency-dependent parameters in the mid-frequency range

Dániel Feszty Janos Kun

Publication Name: Proceedings of Inter Noise 2021 2021 International Congress and Exposition of Noise Control Engineering

Publication Date: 2021-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Efficiency requirements prompt manufacturers to develop ever lighter acoustic packages in vehicles. Poroelastic materials are essential to achieve the desired interior noise level targets and thus the simulation of their effects is of utmost importance in NVH analyses. However, it is challenging to achieve good validation between finite element method (FEM) based simulation results and measurements in the mid-frequency range (400-1000 Hz). One possible reason could be the lack of using frequency-dependent Biot-paremeters describing the poroelastic materials (PEM) characteristics of trims. The present research aims to employ frequency-dependent Biot-parameters for the PEM materials to investigate the acoustic response of a scaled car-like steel structure composed of flat plates and U-section stiffeners enclosing an air cavity. Porous acoustic material is applied to the walls of the cavity. The focus of the study is to understand the effect of applying frequency-dependent Young's modulus and damping values for the PEM parameters in the 100-1000 Hz range. Simulation results obtained from ESI VPS FEM solver are compared with measurements, with particular focus on the interior sound pressure levels. The simulation methodology, including discretization techniques, structural damping and fluid damping applications are described in detail.

Open Access: Yes

DOI: 10.3397/IN-2021-2869

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

Thermodynamic Processes in Nanostructured Thermocoatings

David Bozsaky

Publication Name: Current Topics and Trends on Durability of Building Materials and Components Proceedings of the 15th International Conference on Durability of Building Materials and Components Dbmc 2020

Publication Date: 2020-01-01

Volume: Unknown

Issue: Unknown

Page Range: 1127-1134

Description:

In the 21st century, global climate change and the high level of fossil energy consumption have introduced changes affecting all sectors of the economy, including the building industry. This process has prompted EU members to create strict regulations in building energetics. It has become a serious task for architects to find more effective ways for thermal insulation. One of these options is the application of nanostructured materials. Among them nano-ceramic thermocoatings open a wide range of research fields, because complete agreement had not been already found about their insulating effect. In order to explore and describe the thermodynamic process inside nano-ceramic thermocoatings 6 series of heat transfer resistance experiments were performed in 2014-2018. Several building structure configurations with 12 different orders of layers were tested with a standard heat flow meter. On basis of these results it could be concluded that in case of nano-structured thermocoatings convective heat transfer coefficient might be taken account in different way than in case of traditional macro-structured thermal insulation materials. Based on research results, the limits of its applicability can also be concluded. It has also been found that the insulating effect of nanostructured thermocoatings depends on the material characteristics of the insulated surface.

Open Access: Yes

DOI: 10.23967/dbmc.2020.139