http://hdl.handle.net/20.500.14044/33857 2026-07-21T07:00:07Z 2026-07-21T07:00:07Z Ferencz, Katalin Domokos, József Kovács, Levente http://hdl.handle.net/20.500.14044/33493 2025-09-18T07:38:37Z 2024-01-01T00:00:00Z

Cloud Integration of Industrial IoT Systems. Architecture, Security Aspects and Sample Implementations Ferencz, Katalin; Domokos, József; Kovács, Levente Today's industry is increasingly characterized by the integration of Internet of Things (IoT) devices and the rapidly spreading digitization trend, which are also known as the foundations of Industry 4.0. The industrial revolution characterizes our everyday life, as a result of which the integration of smart devices is gaining more and more space in industry as well. As a result of the introduction of Industry 4.0, the implementation of the automation of production processes also becomes an important issue, as well as the continuous collection of data and their storage in the cloud. As a result of these integration, the method of collecting data, the usability of cloud-based systems, the feasibility of artificial intelligence-based data analysis, the visualization of massive amounts of collected data, cybersecurity issues, etc. have become everyday issues. In this article, we provide a detailed overview of a general IIoT (Industrial IoT) system, its various cloud service-based implementations, and present our open-source alternative solution. At the same time, we present the study of the security aspects and the integration of SOC into an IIoT system. Taking these aspects into account, we present two sample applications that try to offer ready to use solutions to certain problems of today's industry.

2024-01-01T00:00:00Z Venczel, Tamás Bence Berényi, László Hriczó, Krisztián http://hdl.handle.net/20.500.14044/33491 2025-09-18T07:38:21Z 2024-01-01T00:00:00Z

Q-sort Evaluation of Risk Factors by Automotive Experts Venczel, Tamás Bence; Berényi, László; Hriczó, Krisztián The high level of standardization within the automotive industry may support avoiding the occurrence of common and unforeseen risks. There are several risk management methods available, but effective actions need to understand current challenges. Automotive risk management requires a comprehensive measure and evaluation approach. The research aims to map the risk factors of managing the automotive industry for preparing a decision support model through a pilot study. The analysis used a list of risk factors based on the literature and idiographic data collection among 22 experts in 2023. The study used the Q-methodology to create characteristic patterns of opinions. Three factors were separated and entitled based on their expressed opinions Factor 1 “Follow Standards!”, Factor 2 “Take Control!” and Factor 3 “Be Flexible!”. Factor 1 respects mostly the automotive standards (e.g., IATF, VDA, and FMEA). Factor 2 consists of opinions to support actions that can increase overall control. Factor 3 supports every aspect to increase flexibility. There is consensus among the three factors on the high importance of Total Productive Maintenance (TPM) and proper supplier selection among the respondents. Relative opinions in the field may contribute to developing company-level risk mitigation strategies and understanding supply chain-level challenges. The study confirms the applicability of Q-methodology to discover opinion groups and, therefore, can be considered a novel contribution to the research field, from a methodological perspective.

2024-01-01T00:00:00Z Solic, Kresimir Velki, Tena Fosic, Igor Vukovic, Marin http://hdl.handle.net/20.500.14044/33490 2025-09-18T07:38:01Z 2024-01-01T00:00:00Z

Study on Information Security Awareness using the Behavioral-Cognitive Internet Security Questionnaire Solic, Kresimir; Velki, Tena; Fosic, Igor; Vukovic, Marin As technical security solutions are far from being enough to protect different kinds of information and communication systems, due to the human element, it was necessary to involve psychologists and define this problem as an interdisciplinary one. A validated questionnaire can be a good instrument for measuring users’ information security awareness, knowledge on privacy issues and risk involved in online behavior, so conclusions gathered through empirical studies based on those kinds of questionnaires should be helpful in designing educative training programs. The aim of this paper was both to present the validated Behavioral-Cognitive Internet Security Questionnaire and prove its suitability for international usage as well as to present general conclusions regarding information and communication system users gathered through its development process. In this study, were included participants from 41 different countries, while English, Croatian, Slovenian and Hungarian language versions of questionnaire were used. Results have shown that developed questionnaire can be used internationally and the sum of the conclusions is that users believe themselves to act more safely than they actually do; awareness has been rising over the years, but risk in online behavior has not been mitigated. Consequently, many users will still reveal their password, mostly under the influence of friendship or authority. Therefore, seeing as existing solutions are not good enough to resolve this global problem further studies should focus on developing some kind of an interactive platform that will be based on the results of empirical studies. It should not be based on restrictions, but rather on educational training, preferably personalized, and expanded with real-time warning solutions in order to keep up with constant changes in this field.

2024-01-01T00:00:00Z Kovács, László Bolló, Betti Szabó, Szilárd http://hdl.handle.net/20.500.14044/33488 2025-09-18T07:37:48Z 2024-01-01T00:00:00Z

A Complex Comparatrive Study of Two Dissimilar Engine Valve Constructions, for the In-Cylinder Flow Behaviour of a High Speed, IC Engine Kovács, László; Bolló, Betti; Szabó, Szilárd In our research we investigated the possibility of offering a viable alternative for internal combustion engines’ poppet valves. After examining in-cylinder flow characterization methods, we derived a computer model of the base concept and a special swinging valve arrangement. The flow characterization of both arrangements has been completed using numerical fluid dynamics software. To minimize numerical errors different mesh scenarios were investigated and evaluated. From our research activity a clear picture has been drawn on the qualities of the proposed system. The swinging valve arrangement improves the efficiency of the gas exchange process. Also, the flow during the intake process is more structured and has less local vorticity. The results have also shown a very favourable charge movement pattern that is ideal for GDI engines. All of these findings produce an appropriate platform for a stratified charging, extra lean burning engine concept. The construction concept lends itself to be flawlessly integrated in a throttle-less engine control environment as well. With these qualities the new valve arrangement may be the ideal solution to produce fuel efficient, high specific output engines, for those transportation systems that will still need to rely on fossil fuels in the future.

2024-01-01T00:00:00Z