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Publications - 6383

Nonlinear Simulation of a Magnetic Flux Leakage Measurement System

Miklós Kuczmann Gergely Kovács

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2008-12-01

Volume: 84

Issue: 12

Page Range: 184-187

Description:

The paper presents the building up of a computer controlled measurement system based on National Instruments Data Acquisition card and National Instruments LabVIEW software package. The aim of this research is to detect surface cracks on steels by applying a Magnetic Flux Leakage (MFL) testing method. First, a finite element based procedure has been implemented to analyze the arrangement. One important question is the position of the sensors. Now, eddy currents have been neglected, but the nonlinear characteristics of specimen have been taken into account.

Open Access: Yes

DOI: DOI not available

Revisiting intellectual capital in the digital workplaces: the role of employee capabilities, digital infrastructure and platform literacy

Ebtesam Abdullah Alzeiby Sushant Kumar Vishnoi Snigdha Dash Gerardo Bosco Attila Kurucz Giovanni Papa

Publication Name: Journal of Intellectual Capital

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Purpose – This study utilizes intellectual capital theory (ICT) to examine the impact of intellectual agility, digital creativity, platform readiness, algorithmic autonomy support, networking competence and emotional congruence on the social media reuse likelihood of employees. This study also explores the moderating role of platform literacy between intellectual capital dimensions and social media reuse likelihood. Design/methodology/approach – This study employed a cross-sectional, quantitative research design by collecting data from 300 employees working across diverse industries. Covariance-based structured equation modelling is used to analyse the data and test the hypotheses. Findings – The findings demonstrate that intellectual agility, digital creativity, platform readiness and algorithmic autonomy significantly shape the social media reuse likelihood of employees. The results also established the moderating role of platform literacy between digital creativity, networking competence and social media reuse likelihood. Originality/value – This study offers a novel framework grounded in intellectual capital theory by integrating dimensions of human capital, structural capital, relational capital and platform literacy to predict the social media reuse likelihood of employees in technology-centred workplaces.

Open Access: Yes

DOI: 10.1108/JIC-06-2025-0264

To the Margin of the Theory of a New Type of Warfare Examining Certain Aspects of Cyber Warfare

Roland Kelemen Ádám Farkas

Publication Name: Hungarian Yearbook of International Law and European Law

Publication Date: 2019-01-01

Volume: 7

Issue: 1

Page Range: 203-226

Description:

In the second half of the 20th century, humanity went through an unprecedented technical and technological development. As a result, technological innovations emerged in the course of the last third of the century which have now become indispensable parts of everyday life, the whole society and even the state. Among them, we must mention the IT sector, which has effectively enabled global contacts and communication between people and organizations across different parts of the world through various tools, programs and networks. Moreover, it also facilitates and simplifies everyday tasks both in the private and the public sector. Cyberspace is a unique and complex phenomenon, since it can be described with physical and geographical concepts, but in addition, its virtual features also have extraordinary relevance. As a result of its remarkable expansion, fundamental areas such as sociology, geopolitics, security policy or warfare must also be reconsidered. This paper provides an overview of the new types of security challenges for the 21st century, most notably security risks related to the cyberspace. In addition, some aspects of cyber warfare, such as cyber intelligence, cyber attack and cyber defense are examined. Particular attention is given to the question whether a cyber attack in itself can reach the level of an armed attack, and if so, what means can be used by the State under attack in defense.

Open Access: Yes

DOI: 10.5553/HYIEL/266627012019007001012

Design and Analysis of a Bandwidth Aware Adaptive Multipath N-Channel Routing Protocol for 5G Internet of Things (IoT)

Satyanand Singh Joanna Rosak-Szyrocka Balazs Lukacs

Publication Name: Emerging Science Journal

Publication Date: 2024-02-01

Volume: 8

Issue: 1

Page Range: 251-269

Description:

Large numbers of mobile wireless nodes that can move randomly and join or leave the network at any moment make up mobile ad-hoc networks. A significant number of messages are delivered during information exchange in populated regions because of the Internet of Things' (IoT) exponential increase in connected devices. Congestion can increase transmission latency and packet loss by causing congestion. More network size, increased network traffic, and high mobility that necessitate dynamic topology make this problem worse. An adaptive Multipath Multichannel Energy Efficient (AMMEE) routing strategy is proposed in this study, in which route selection strategies depend on forecasted energy consumption per packet, available bandwidth, queue length, and channel utilization. While multichannel uses a channel-ideal assignment process to lessen network collisions, multipath offers various paths and balances network strain. The link bandwidth is split up into a few sub-channels in the multichannel mechanism. To reduce network collisions, several source nodes simultaneously access the channel bandwidth. The cooperative multipath multichannel technique offers several paths from a single source or from several sources to the destination without colliding or becoming congested. The AMMEE routing approach is the basis for path selection. A load-and bandwidth-aware routing mechanism in the proposed AMMEE chooses the path based on node energy and forecasts their lifetime, which improves network dependability. The outcome demonstrates a comparative analysis of various multichannel medium access control (MMAC) techniques, including Parallel Rendezvous Multi Channel Medium Access Protocol (PRMMAC), Quality of Service Ad hoc On Demand Multipath Distance Vector (QoS-AOMDV), Q-learning-based Multipath Routing (QMR), and Topological Change Adaptive Ad hoc On-demand Multipath Distance Vector (TA-AOMDV) and the proposed AMMEE method. The results show that the AMMEE approach outperforms alternative systems.

Open Access: Yes

DOI: 10.28991/ESJ-2024-08-01-018

New results in abduction process modeling

Claudiu Radu Pozna Radu Emil Precup

Publication Name: Ines 2011 15th International Conference on Intelligent Engineering Systems Proceedings

Publication Date: 2011-08-22

Volume: Unknown

Issue: Unknown

Page Range: 203-208

Description:

The paper gives new results related to the abduction process modeling. The results are based on a strategy that ensures, in minimum steps, the evidence necessary to deduce the correct hypothesis. An example that deals with two agents (robots), the Master and the Apprentice, that build a configuration of bricks, is inserted to exemplify the minimum length solution algorithm. The process of problem definition in this example involves both agents, and the cooperation between the agents is formalized in terms of decision trees. © 2011 IEEE.

Open Access: Yes

DOI: 10.1109/INES.2011.5954745

The analysis of injection molding defects caused by gate vestiges

Norbert Krisztián Kovács András Suplicz József Gábor Kovács Tamás Tábi Béla Zink Hajnalka Hargitai Ferenc Szabó

Publication Name: Express Polymer Letters

Publication Date: 2015-04-01

Volume: 9

Issue: 4

Page Range: 394-400

Description:

Issues of product safety are the most serious problems of an injection molded product due to their risk to human health. Such a safety problem can be the needle-shaped vestige at the gate zone of injection molded products, called a gate vestige. Only observations of the formation of gate vestiges can be found in the literature, but the processing parameters influencing their dimensions, especially their height have not been studied yet. Our goal was to study the effect of various injection molding processing parameters and gate constructions on gate vestige formation.

Open Access: Yes

DOI: 10.3144/expresspolymlett.2015.37

State-of-the-Art: Integrating Fastener Technology and Design Guidelines for Enhanced Performance of Cold-Formed Steel Sections

Ardalan B. Hussein F. Papp

Publication Name: Buildings

Publication Date: 2023-09-01

Volume: 13

Issue: 9

Page Range: Unknown

Description:

Cold-formed steel (CFS) elements have gained significant attention in the field of structural engineering due to their numerous advantages, including high strength-to-weight ratio, cost-effectiveness, and ease of assembly and prefabrication. This review paper presents a comprehensive state-of-the-art analysis of the design and analysis of CFS structures, with a specific focus on columns and beams. The primary objectives and aims of this review paper are to provide a detailed assessment of the factors influencing the behavior and performance of CFS elements, including partial composite action, fastener spacing, bolt arrangement, web aperture, stiffeners, and connection spacing, to propose and present various formulas and methodologies that accurately estimate critical buckling loads, strength, and moment resistance for CFS members, and to emphasize the significance of proper screw and bolt placement in preventing premature failure and enhancing the overall load-carrying capacity of CFS structures. Additionally, the impact of temperature on the mechanical properties and performance of CFS members is discussed. The review paper proposes different formulas and methodologies to accurately estimate critical buckling loads, strength, and moment resistance for CFS members. Moreover, the paper highlights the importance of proper screw and bolt placement to prevent early failure and improve the overall load-carrying capacity of CFS structures. The discussion also emphasizes the need for revisions in existing standards and codes to provide more practical guidelines for designers and engineers. Overall, this state-of-the-art review paper provides valuable insights and recommendations for researchers and practitioners involved in the design and analysis of CFS elements.

Open Access: Yes

DOI: 10.3390/buildings13092338

Determination of two color agents in hard boiled candy by laser-based photoacoustic spectroscopy and colorimetry

Mihály Kovács David Richfield Ottó Dóka

Publication Name: Carpathian Journal of Food Science and Technology

Publication Date: 2019-01-01

Volume: 11

Issue: 4

Page Range: 126-132

Description:

Determination of color agents was performed by laser-based photoacoustic spectroscopy (LPAS) and colorimetry in hard boiled candies containing two different colorants (anthocyanin and beta carotene). LPAS and colorimetry are fast and direct methods which do not require any chemicals or complicated sample preparation such as extraction. Both LPAS and colorimetry were shown to be suitable for quick determination of anthocyanin and beta carotene content in hard boiled candies. The determination of anthocyanin content in colored hard-boiled candies is possible by LPAS at 532 nm or by colorimetry using ΔE*, while the beta carotene content can be measured by LPAS at 473 nm or by colorimetry using the Hue color index.

Open Access: Yes

DOI: 10.34302/2019.11.4.11

Effect of filament humidity on the properties of material extrusion 3D-printed acrylonitrile butadiene styrene/hexagonal boron nitride composites

Imre Fekete László Lendvai Daniele Rigotti Sándor K. Jakab Alessandro Pegoretti

Publication Name: Emergent Materials

Publication Date: 2025-12-01

Volume: 8

Issue: 8

Page Range: 6791-6806

Description:

This study investigates the effect of filament moisture content on material extrusion (MEX) 3D-printed composites using acrylonitrile butadiene styrene (ABS) as the polymer matrix and 0–10 vol% hexagonal boron nitride (BN) as reinforcement. ABS/BN composites were prepared through batchwise compounding and extruded into MEX-suitable filaments. The filaments were conditioned at 30 °C and 10% or 90% relative humidity (RH) before/during direct feeding into the 3D printer. Specimens were fabricated with raster angles parallel (0°) and perpendicular (90°) to their length. Micro- and macrostructural analyses using scanning electron microscopy and computed tomography revealed intensive void formation, especially in BN-filled composites 3D-printed from humid filaments. This was attributed to BN acting as a physical barrier, hindering the outgassing of evaporated water during 3D printing. Mechanical properties were evaluated using tensile and Charpy impact tests. Based on the tensile test results, neat ABS was the least sensitive to filament moisture, with tensile strength at 0° raster angle dropping from 40.5 MPa to 36.7 MPa as storage RH was increased from 10 to 90%. For composites with 10 vol% BN loading, tensile strength dropped from 34.1 MPa to 22.3 MPa. Charpy impact strength exhibited similar reductions, ascribed to the porous structure of the BN-filled composites caused by the evaporated moisture. Thermal conductivity was also examined, showing slightly superior performance for samples 3D-printed from filaments stored in less humid conditions. For unfilled ABS, the conductivity slightly decreased from 0.188 to 0.185 W/mK, while for 10 vol% BN-filled composite, it dropped from 0.778 to 0.617 W/mK.

Open Access: Yes

DOI: 10.1007/s42247-025-01108-6