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Found 6327 publications

Investigation of deformations of a lithium polymer cell using the Digital Image Correlation Method (DICM)

Szabolcs Fischer Szabolcs Szalai Dóra Harangozó Szabolcs Szurke Kocsis

Publication Name: Reports in Mechanical Engineering

Publication Date: 2022-01-01

Volume: 3

Issue: 1

Page Range: 116-134

Description:

This research aims to investigate the adaptability of a measurement system or a process in determining the parameters of batteries. Methods are suggested for different applications, and properties gained by these measurements are specified. Deformations of lithium polymer batteries measured by various methodologies are also analyzed in detail. Changes in the geometry of worn-out batteries and the localization of the changes can be better understood by applying the results. The GOM ATOS and the GOM ARAMIS systems were applied to characterize lithium polymer batteries. Discontinuous tests were performed and the battery was discharged to 0 V and then fully charged for both methods. The advantages and disadvantages and the applicability of the two measurement systems were analyzed in this topic.

Open Access: Yes

DOI: 10.31181/rme20008022022s

Data-Based Assembly Patterns for Overall Equipment Effectiveness at Semi-Automatic Assembly Lines

János Jósvai Péter Dobra

Publication Name: Periodica Polytechnica Mechanical Engineering

Publication Date: 2022-01-01

Volume: 66

Issue: 3

Page Range: 231-236

Description:

In industrial practice, production planning is a key factor for manufacturers and suppliers. The entire planning process spans from the appearance of the customer demand to the fulfillment of the demand. Operational execution is based on pre-planned production processes and operations using properly allocated resources. The accurate planning of assembly operations within production is an extremely complex process in terms of efficiency. Predicting stochastically variable efficiencies is difficult due to the ever-changing manufacturing conditions. This paper defines typical assembly process situations for a semi-automatic assembly line and examines their consequence for the Overall Equipment Effectiveness (OEE). Firstly, a literature review demonstrates the scientific relevance. Secondly, the classification of patterns based on assembly process description parameters is described taking into account the positive and negative effects on the OEE. In addition, the assembly patterns and their characteristics are illustrated through a real automotive example.

Open Access: Yes

DOI: 10.3311/PPme.19910

A SURVEY OF WOODY PLANTS CHOSEN FOR THE ESTABLISHMENT OF FRONT GARDENS IN VILLAGES SUBURBANIZED TO VARYING DEGREES AROUND KECSKEMÉT, HUNGARY

Tamás Hardi Jenő Zsolt Farkas Péter Csontos Júlia Tamás Edit Hoyk

Publication Name: Journal of Landscape Ecology

Publication Date: 2022-01-01

Volume: 20

Issue: 2

Page Range: 95-113

Description:

We examined the number of species and individuals of woody vegetation in a total of 150 front gardens in settlements located at three different distances from Kecskemét and affected by suburbanization to different degrees. Most often, one species or two individuals occurred in front gardens, but there were also front gardens with 8 or more species and 14 or more individuals in some cases. The total of 668 recorded individuals belonged to 111 species, among which the first five places were occupied by Biota orientalis, Hibiscus syriacus, Thuja occidentalis, Catalpa bignonioides and Cerasus vulgaris. The combined number of individuals of the five species accounted for 26% of all woody plant individuals observed. The data were evaluated according to several groupings: tree, shrub, hedge or liana; native, archaeophyte or neophyte; fruit tree vs. ornamental tree; deciduous vs. evergreen; and the effect of the electric power transmission lines above the front gardens was also examined. Our results highlight the plant selection habits of the residents, which can be taken into account for the development of appropriate town planning and landscape planning concepts.

Open Access: Yes

DOI: 10.56617/tl.3445

A CROSS-COUNTRY STUDY ON THE DETERMINANTS OF WORKING CAPITAL MANAGEMENT: GMM APPROACH

Laszlo Vasa Simona Andreea Apostu Ploypailin Kijkasiwat Anwar Hussain

Publication Name: Transformations in Business and Economics

Publication Date: 2022-01-01

Volume: 21

Issue: 3

Page Range: 288-305

Description:

The paper analyzed the determinants of Working Capital Management (WCM) of listed manufacturing firms across South Asian Association of Regional Corporation (SAARC) countries from 2000 to 2020. Employing a Generalized Method of Moments, we found that operational risk and market risk are key hurdles to efficient working capital management. Our results are providing an important managerial implication for the use of operational risk and market risk in selected countries. Firms in selected countries can manage an optimal level of WCM through controlling operational risk and market risk, therefore should develop a ranking system about WCM activities to boost up their firm value.

Open Access: Yes

DOI: DOI not available

Do We Like Majority Decisions? Aspects of the Majority Principle in Voting on the Different Levels of Political Systems

Péter Smuk

Publication Name: Hungarian Yearbook of International Law and European Law

Publication Date: 2022-01-01

Volume: 10

Issue: 1

Page Range: 409-423

Description:

This article aims to review the constitutional justifications for majority requirements arising from the democratic principle, and to analyze some current controversial cases. Although the qualified majority requirement is not a new institution in either the national constitutional systems or the functioning of the EU institutions, the democratic legitimacy of majority voting faces several challenges. In order to present aspects that should be re-evaluated in the light of certain new political strategies, this paper analyses the majoritarian requirements in the Treaties, in the rules of procedures of the European Parliament and also case studies pertaining to the constitution-making majority in Hungary and the controversial case of voting on the Sargentini-report. On the basis of this assessment, we may confirm but also reconsider the majority principle.

Open Access: Yes

DOI: 10.5553/HYIEL/266627012022010001023

Presenting Climate-related Disclosures in the Automotive Sector: Practical Possibilities and Limitations of Current Reporting Prototypes and Methods

Árpád Tóth Alex Suta Katalin Borbély

Publication Name: Chemical Engineering Transactions

Publication Date: 2022-01-01

Volume: 94

Issue: Unknown

Page Range: 379-384

Description:

The eXtensible Business Reporting Language (XBRL) digital reporting system presents the annual accounts and financial data in a standardized format, thus producing comparable reports. This study examines how new sustainability reporting requirements proposed by the recent International Financial Reporting Standard (IFRS) S2 exposure draft could affect current reporting conditions of public listed European automotive manufacturers, from a taxonomical perspective. It was attempted the IFRS taxonomy to be linked with the ISSB's (International Sustainability Standards Board) proposed factors. Based on the changes in the regulatory environment and the existing digital reporting methodology, the paper proposed the inclusion of climate-related disclosure of automotive companies in the existing IFRS Taxonomy. In the taxonomical assessment, it was found that the recent sustainability reporting prototypes will likely affect certain financial statement sections, mostly the Notes to the financial statements. At present, there is no direct information available to investors and consumers on the environmental performance, which could be verified in the financial statements. There is no detailed emissions data that the company produces, as it is mainly the emissions compliance of the final product that is declared, especially in the automotive industry.

Open Access: Yes

DOI: 10.3303/CET2294063

Holistic Online Learning, in a Post COVID-19 World

Marta Konczosne Szombathelyi Kevin Jackson

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 11

Page Range: 125-144

Description:

In August of 2020, the United Nations reported that the COVID-19 pandemic had affected 1.6 billion learners, in more than 190 countries and on all continents [1]. The closing of schools and other learning spaces impacted an astonishing 94% of the world’s student population. These sudden school closures, at all levels, had the immediate and unprecedented effect of triggering a mass migration to emergency remote teaching. While mass vaccinations have enabled educational institutions to reopen and students to return to classrooms in the Fall of 2021, the educational disruption caused by the COVID-19 pandemic is far from over. Higher education must now permanently transition from reductionist, emergency remote learning systems to permanent, holistic online learning platforms. In order to better understand this transition, an online survey was delivered to diverse groups of international students attending Corvinus University and ESSCA School of Management, at the beginning and end of the Spring 2021 semester. The analysis of this survey, strongly indicates that the home and social environments of University, had a significant impact on the student’s learning aptitudes.

Open Access: Yes

DOI: DOI not available

Dual Control Design: TS fuzzy model transformation based approach

Peter Baranyi

Publication Name: 2022 IEEE 1st International Conference on Internet of Digital Reality Iod 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 69-74

Description:

The paper would like introduce the key steps of the Dual Control Design that is based on the fact that if the controller and the observer are derived from different TS fuzzy models of the given model the resulting control solution yield a better control performance. The motivation is based on the fact that finding the best controller and observer requires different features of the TS fuzzy model.

Open Access: Yes

DOI: 10.1109/IoD55468.2022.9986626

Some Dynamical Properties of Higher-Order Fuzzy Cognitive Maps

István A. Harmati Ĺaszĺo T. Ḱoczy

Publication Name: Studies in Computational Intelligence

Publication Date: 2022-01-01

Volume: 959

Issue: Unknown

Page Range: 149-156

Description:

Fuzzy cognitive maps are recurrent neural networks, applied for modelling and simulation of complex dynamic systems. They have been successfully applied to many engineering problems. The conclusion about the system depends on the mathematical behaviour of an iteration, namely, a first-order recursion. The first-order dynamics have some limitations since it takes into account only the previous time step. To overcome these limitations higher-order memory-based fuzzy cognitive maps have been introduced, which use a sequence of preceding states to determine the next one. In this paper, some dynamical properties of higher-order fuzzy cognitive maps are analyzed. Particularly, the existence and uniqueness of equilibrium points and the stability are discussed.

Open Access: Yes

DOI: 10.1007/978-3-030-74970-5_17