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Publications - 6273

Fuzzy QFD assessment of logistics coherence

Peter Foldesi Eszter Sós

Publication Name: 2022 IEEE 6th International Conference on Logistics Operations Management Gol 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Accomplishing purchaser compliance is one of the significant corporate challenges of our time. All products are sold together with the associated logistics service, so it is important that the logistics environment of a company is properly designed in order to meet the objectives of the logistics strategy. In this paper, we present the combined application of Fuzzy system and Quality Function Deployment (QFD) techniques, which are already used effectively in many areas to study sub-processes. Generally, input values are determined as a fuzzy number, in this paper we use fuzzy to evaluate the values. In addition, we have developed a system to examine the compatibility of specific strategic tools and objectives with each other and the usefulness of specific elements for both the customer and the service provider. Using the new approach analysis, we developed a Fuzzy QFD assessment method, we can examine the coherence of logistics processes and technological parameters based on customer needs by comparing different options and alternative solutions. The analysis sheds light on the internal coherence of logistics strategies, thereby clarifying whether the aims that the company has defined can be achieved with the available, planned tools.

Open Access: Yes

DOI: 10.1109/GOL53975.2022.9820009

STATISTICAL ANALYSIS OF TRACK GEOMETRY PARAMETERS ON TRAMWAY LINE NO. 1 IN BUDAPEST

Szabolcs Fischer Vivien Jóvér

Publication Name: Baltic Journal of Road and Bridge Engineering

Publication Date: 2022-01-01

Volume: 17

Issue: 2

Page Range: 75-106

Description:

The article examines the superstructures of the tramway tracks of tramway line No. 1 in Budapest (the capital of Hungary). Since the first appearance of tramways, several technological advancements have been made to serve passenger needs as efficiently as possible. Several types of tramway track superstructure systems can be differentiated, which are implemented differently in each project. Furthermore, these superstructure types have different degradation times (both geometrical and structural), which depend on several factors. Nowadays, visual inspections are no longer considered sufficient in monitoring the tracks’ condition and deterioration, thus it is necessary to consider examinations carried out using the sensors mounted on the vehicles. Adopting appropriate methods, the measured data can be modeled and the life cycle of superstructures and structural elements can be determined as a result of sufficiently long-term studies (i.e., life cycle costs, the whole lifetime, etc.). First, the authors present a review of the relevant international literature, after that they conduct analysis of track geometry parameters of the superstructures related to five sections on the investigated tramway line based on the results of the measurements performed for three consecutive years between 2019 and 2021. The analyses consist primarily in statistical examination of the measured and calculated parameters.

Open Access: Yes

DOI: 10.7250/bjrbe.2022-17.561

Comparison of the A*-A and T φ-phi; Formulations for the 2-D analysis of solid-rotor induction machines

Miklós Kuczmann Daniel Marcsa

Publication Name: IEEE Transactions on Magnetics

Publication Date: 2009-09-01

Volume: 45

Issue: 9

Page Range: 3329-3333

Description:

We present two eddy-current field potential formulations to solve rotating electrical machine problems by applying the finite-element method (FEM) using the motional ${\mbi A}^{*}{-}{\mbi A}$-potential formulation and the motional ${\mbi T}, {\bf \Phi}{-}{\bf \Phi}$-potential formulation. We use the single-phase and three-phase solid-rotor induction motors of Problem No. 30a of TEAM Workshops to compare the potential formulations. We have solved both problems in the time domain and the frequency domain. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/TMAG.2009.2022328

Lifestyle changes during Covid-19 period in Hungary–feedback of university students

Gyöngyvér Lacza Miklós Bánhidi

Publication Name: World Leisure Journal

Publication Date: 2020-10-01

Volume: 62

Issue: 4

Page Range: 325-330

Description:

Our study aimed to investigate the immediate impact of coronavirus on lifestyle changes among Hungarian students from leisure studies living in western part of Hungary. The study comprised an analysis of written reports by the trials focusing on the main lifestyle elements, such as biological needs, social duties and leisure. The respondents stated that the biggest change with them was to take hygienic requirements more seriously (47%), or paying more attention to have organized meals (25.5%). Despite our expectations, for 75.2% of the trials, it was important to study more, but also every third student (31.4%) had to do more physical work to earn money for their studies. Students wrote about suffering from the lack of entertainment businesses due to the lockdown. Instead of going out, they found it very important to do more sports (mainly workout 67.2%) and use virtual entertainment such as watching videos (47.4%) and reading books (44.5%).

Open Access: Yes

DOI: 10.1080/16078055.2020.1825251

Consumer Consciousness and Motivational Factors in Second-Hand Clothing Purchases: A Systematic Literature Review

Gábor Szábo-Szentgróti Bence Végvári Virág Walter

Publication Name: Decision Making Applications in Management and Engineering

Publication Date: 2025-01-01

Volume: 8

Issue: 1

Page Range: 550-568

Description:

The fást fáshion industry poses significánt environmentál chállenges, which háve driven á growing number of consumers to ádopt more sustáináble shopping hábits. Alongside environmentál concerns, rising consumer prices háve ácceleráted the growth of the second-hánd clothing márket. The study áims to provide á theoreticál foundátion for reseárch on consumer motivátions in the second-hánd clothing márket. By systemáticálly reviewing recent internátionál literáture, the study identifies key fáctors, dimensions, ánd meásurement tools used to understánd consumer behávior in this domáin. A systemátic literáture review wás conducted using árticles from the Scopus ánd Web of Science dátábáses, focusing on publicátions from the lást 10 yeárs. Strict exclusion criteriá were ápplied to ensure the relevánce ánd quálity of the ánályzed works. Purchásing second-hánd clothing reduces wáste, minimizes the demánd for new clothing production, ánd decreáses resource use ánd pollution. Motivátionál fáctors include the "treásure hunting" áspect of second-hánd shopping ánd its environmentál benefits. Businesses cán cápitálize on these motivátions to engáge environmentálly conscious consumers. Businesses should emphásize the treásure-hunting experience of second-hánd shopping álongside the environmentál benefits, which could potentiálly reách the growing sháre of environmentálly conscious consumers. Policymákers should ádopt práctices for sustáináble consumption behávior, such ás second-hánd clothing purcháses with reduced táxátion, encouráging environmentálly friendly consumer behávior.

Open Access: Yes

DOI: 10.31181/dmame8120251435

Structural entropy in detecting background patterns of AFM images

L. M. Molnár Imre Mojzes Szilvia Nagy

Publication Name: Vacuum

Publication Date: 2009-08-25

Volume: 84

Issue: 1

Page Range: 179-183

Description:

Structural entropy was developed for detecting the type of localization in charge distributions on a finite grid, especially in mesoscopic electronic systems. However, it is possible to detect and analyze superstructures, i.e., topologies consisting of more structures with different types of localization properties. In the definition of the structural entropy, the von Neumann entropy of the system is divided into two parts: first, the extension entropy, which is simply the logarithm of the occupation number; the second part is the structural entropy. On a structural entropy versus logarithm of the spatial filling factor map, the different types of localizations follow different, well-characterized curves. Spatial filling factor measures the percentage of the "filled" (i.e., high intensity) pixels of the image. An atomic force microscopy (AFM) image can be interpreted as some kind of charge distribution on a grid: after normalization, the darkness (or lightness) of the pixels fulfills all the necessary conditions. AFM image artifacts can be detected by plotting the structural entropy versus the logarithm of the spatial filling factor maps of the images. Not only the type of an added large-scale Gaussian, parabolic, exponential, or other function can be identified, but also by careful study of the curves belonging to the structures, the parameters can be detected, too. © 2009 Elsevier Ltd. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.vacuum.2009.04.025

The Quality of Reserve Risk Calculation Models under Solvency II and IFRS 17

László Martinek N. Miklós Arató

Publication Name: Risks

Publication Date: 2022-11-01

Volume: 10

Issue: 11

Page Range: Unknown

Description:

We analyse four stochastic claims reserving methods in terms of their capability to estimate reserve risk and how successful they are at predicting distributions and VaRs of claim developments in particular. Both actual data and hypothetical claim triangles support our results. The appropriateness of the Solvency II risk margin on a one-year horizon and of the IFRS 17 risk adjustment in the long run largely vary by the chosen risk model. Despite the fact that IFRS 17 does not uniquely prescribe the metric for risk adjustment, we expect that VaR will be widely applied by insurance firms. Overall, actual data suggest that VaRs are predominantly underestimated by the models. Nevertheless, the (Formula presented.) -VaRs under Solvency II are mostly sufficient on a 10-year-horizon to cover liabilities.

Open Access: Yes

DOI: 10.3390/risks10110204

Proposal of a graph-based motion planner architecture

Áron Ballagi Csaba Hajdu

Publication Name: 11th IEEE International Conference on Cognitive Infocommunications Coginfocom 2020 Proceedings

Publication Date: 2020-09-23

Volume: Unknown

Issue: Unknown

Page Range: 393-398

Description:

Motion planning is a critical task in robots and autonomous vehicles. This task is typically complex in computation and structure. Current frameworks are difficult to extend and supervise. This article presents a new architectural proposal of motion planning software, which can be used by mobile robots and autonomous vehicles. Defining aspects have been inspired by the foundations of Cognitive Infocommunications (CogInfoCom) to construct a highly interactive system aiming intuitive human-computer collaboration. The structure is based on a graph-based approach which is suitable in a distributed setting. This formalization provides a graphical behavior description, an intuitive way for human actors to interact with the system. The behavior of each acting component is based on a hybrid-system formalism which can further serve as a basis to model human behavior.

Open Access: Yes

DOI: 10.1109/CogInfoCom50765.2020.9237891

Fractal properties of AlGeNi layers on GaAs surfaces

L. M. Molnár Bernadett Varga Imre Mojzes Szilvia Nagy

Publication Name: Vacuum

Publication Date: 2009-08-25

Volume: 84

Issue: 1

Page Range: 251-253

Description:

The thermal interactions of thin AlGe and AlNiGe layers with a bulk GaAs monocrystal were investigated. The heat treatment of these systems was carried out in the working chamber of a scanning electron microscope. The SEM pictures were analysed using a fractal mathematical technique. It was found that the surface of the samples has fractal character. No temperature dependence of the fractal dimension was observed. The samples were also studied using the structural entropy versus filling factor maps of the samples in order to find their localization properties. The SEM pictures of AlGe perform mostly as a Gaussian functions, whereas the AlNiGe samples show usually a behaviour with exponential decay. © 2009 Elsevier Ltd. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.vacuum.2009.06.005