Hibridni događaj

Program događaja

srijeda, 4.6.2025 14:30 - 19:00, Nava 2, Hotel Admiral, Opatija 14:30 - 15:00 Pozvano predavanje  Pavle Skočir (Axiros, Zagreb, Croatia) Više od povezivosti - Domena upravljanja uređajima  15:00 - 15:45 Na putu prema 6G mreži  1. Z. Ennaceur, I. Brasileiro, A. Jukan (TU Braunschweig, Braunschweig, Germany), C. Keuker (Smart Mobile Labs, Munich, Germany) Towards Adaptive Topology Management in Service-Oriented 6G Networks  An efficient topology management system is essential for enabling dynamic network creation in future 6G networks, where each autonomous network entity, i.e., a sub-network, can be deployed for specific application scenarios. This paper presents an enhanced topology change management system designed for a hybrid 6G network that integrates terrestrial and satellite- assisted sub-networks. The system extends existing topology management frameworks by incorporating key functions such as discovery, monitoring, detection, prediction, and adaptation. A central focus of this work is Topology Detection and Prediction and Topology Adaptation (i.e., decision-making). The former leverages machine learning to anticipate topology changes proac- tively, while the latter optimizes network responses for seamless adaptation. To improve decision accuracy and robustness, we propose an ensemble learning approach that integrates XGBoost, Random Forest, and SVM using a confidence-weighted voting mechanism. This method balances the strengths of individual models. We address three critical topology change scenarios: (1) Handover; (2) Connection Loss; and (3) Sub-network Over- load. The results show that XGBoost outperforms other models in detecting handovers and sub-network overloads. Regarding decision-making, the ensemble model refines predictions by reducing uncertainty and improving confidence. SVM remains the most conservative model, minimizing unnecessary topology changes, while XGBoost excels in rapid response scenarios, ensuring fast and confident decisions. Random Forest provides a balanced performance between stability and adaptability. The ensemble model further enhances decision consistency by ag- gregating diverse model perspectives, reducing misclassifications, and improving adaptation. Overall, the proposed ensemble-based topology adaptation approach significantly enhances decision accuracy , making it an effective solution for managing topology changes in next-generation 6G networks. 2. S. Kitanov (Mother Teresa University, Faculty of Information Sciences, Skopje, Macedonia) 6G Mobile Networks and Dew Computing – Research Trends and Challenges  5G mobile networks have already begun to face challenges such as network congestion, latency, and scalability limitations. This is because the most significant amount of information processing all around us is performed on the lowest possible computing level, outright connected to the physical environment and mostly directly controlling our human immediate surroundings. In this direction, many research initiatives and industrial communities started to work on the development of 6G mobile networks. On the other hand, Dew computing is a distributed computing paradigms that represents an extension of the cloud computing paradigm. In dew computing, users can perform full system functionality without depending on internet availability. It prioritizes empowering user devices as computing resources and utilizing the internet for data synchronization. In dew computing, users do not have to always connect to the internet to use system functionality. Dew computing enhances cloud services using local device resources. The primary objective of this research paper is to explore dew computing capabilities in 6G mobile networks, and to propose a 6G network architecture in a dew computing environment, which is expected to overcome the challenges and issues in of existing 5G network infrastructures. 3. V. SORATHIYA, V. VEKARIYA (PARUL UNIVERSITY, VADODARA, India) Ultrawideband and high gain four port based dipole engraved squared patched MIMO antenna for THz communication  We proposed the dipole engraved square patch-shaped four-port MIMO antenna design. The proposed MIMO antenna is numerically investigated for the 1 to 25 THz band of the frequency. This antenna is designed with a graphene-based perfect conductor with a polyamide substrate. The proposed antenna is analyzed in terms of various design parameters such as S parameters, gain, E field, radiation patterns and other MIMO antenna parameters. This antenna offers the four radiation bands with maximum and minimum bandwidths of 12.2 THz and 0.4 THz respectively. The proposed antenna also offers the maximum gain of 9.58 dBi for its second band of the 0.4 THz bandwidth. The proposed results and analysis can be applied to designing future 6G and wireless communication systems. 15:45 - 16:30 Mobilne mreže i elektromagnetsko zračenje  1. D. Poljak, V. Dorić (University of Split, FESB, Split, Croatia), M. Galić (Environmental Measurement Center, Zagreb, Croatia), Z. Novaković Šesnić (Croatian Transsmision System Operator, Splt, Croatia) On the use of efficient methods for the assessment of radiated field from radio base station antennas and related legal issues pertaining to human exposure to nonionizing radiation  Contemporary wireless communication systems, in particular of fifth generation (5G) and the sixth generation (6G) of mobile communication systems operating in the GHz frequency range (millimetre waves) must not only provide a high quality of service (QoS), but also meet the necessary safety aspects regarding human exposure to radiation from such systems. The first step in the electromagnetic-thermal dosimetry, including the assessment of internal fields and related local temperature increase in tissues, is to determine external fields generated by radiation sources via calculation and/or measuremens. This paper reviews some models for the determination of the field levels due to radiation of base station antennas to which humans could be exposed. Some efficient analytical/numerical deterministic-stochastic methods used by authors are reviewed and number of illustrative computational examples for realistic scenarios of human exposure to radio base station antennas are presented. Certain measurement procedures are also outlined and measurement results are presented for typical exposure scenarios. The state-of-the art regarding corresponding international and national legal issues are given in the paper, as well. 2. D. Poljak, V. Dorić (Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia) Parametric Study of the Radiated Field from Base Stations Using the Integral Equation Approach  The assessment of human exposure to high frequency (HF) radiation from base station antenna systems is carried out using the various methods of the electromagnetic-thermal dosimetry which starts with a calculation and/or measurements of the external fields. The present work deals with the calculation of the electric field radiated by a base station antenna system using rigorous Pocklington integro-differential approach arising from the wire antenna theory and related numerical solution procedures. In particular, a study on impact of the antenna length, height above ground, number of antennas, ground permittivity and conductivity for several operating frequency is given in the paper. A number of illustrative computational examples are given in the paper. 3. D. Berisha, A. Jerliu, M. Ibrani (Faculty of Electrical and Computer Engineering, University of Prishtina, Prishtinë, Kosovo) Broadband measurements of electromagnetic field exposure levels in indoor and outdoor environments  The increasing complexity and proliferation of wireless communication technologies require accurate assessment of electromagnetic field exposure levels. In this study, we present the results of comprehensive broadband measurements of electric field levels in the frequency range of 100 kHz to 3 GHz. Data samples were collected using the Narda EMR 300 RF survey meter, following a standardized measurement protocol developed for this research. Measurements were conducted across different environments in various cities in Kosovo, including indoor settings (offices, and residential homes), transportation vehicles, and outdoor areas. The highest electric field value was recorded in an outdoor urban area, measuring 5.44 V/m. A total of 708 electric field samples were post-processed and analyzed. The measured field levels were compared across different environments and evaluated against established electromagnetic field exposure standards. These measurement results are below the exposure safety limits given by the International Commission on Non-Ionizing Radiation Protection and contribute to the development of EMF-aware wireless communication systems. 16:30 - 16:45 Pauza  16:45 - 18:00 Nove aplikacije  1. V. Franki, L. Calcich, A. Višković (Faculty of Engineering Rijeka, Rijeka, Croatia) Artificial Intelligence for Hydrogen-Based Energy Systems  Power-to-hydrogen (P2H) technologies and hybrid energy systems based on green hydrogen are receiving a growing amount of attention, especially in the context of the energy transition. Green hydrogen is perceived as a promising solution in replacing traditional, non-renewable energy sources. However, the implementation of green hydrogen is entailed by a series of challenges and its widespread adoption is yet to be achieved. Besides the techno-economic feasibility issues, the implementation of green hydrogen is heavily linked with the process of optimal integration in the power system. Typical energy management strategies focus on conventional simulation and optimization methods that are oftentimes unable to fully reap the potential of green hydrogen hybrid systems. In this context, the application of artificial intelligence (AI) based solutions might prove to be a crucial stepping stone towards a widespread adoption of green hydrogen. Considering the growing importance of both AI and green hydrogen, the paper analyses the current status and future prospects of AI applications in hydrogen-based energy systems. It also explores different issues and barriers to the wider adoption of green hydrogen and presents a case-study of a hydrogen-based hybrid energy system. 2. M. Kristić, A. Kešelj Dilberović (University of Dubrovnik, Faculty of Electrical Engineering and Applied Computing , Dubrovnik, Croatia), T. Jagušt (University of Zagreb, Faculty of Electrical Engineering and Computing , Zagreb, Croatia) Comparative Analysis of User Experience and Task Performance in Holographic Educational Application  This study evaluates the user experience and task performance within a holographic learning application designed to enhance the learning experience. The application provides users with both 2D and 3D interaction modes. Using the HoloZoo application, user interactions with the holographic technology were compared, focusing on the relationship between task performance and user familiarity with holographic technologies. Key metrics such as task completion time and subjective feedback were analysed to determine how prior experience affects users' efficiency, cognitive load and satisfaction. The results provide insights on the integration of holographic applications in educational institutions and their accessibility for users with different levels of technological knowledge. 3. S. Stoyanov, S. Letskovska, K. Seymenliyski, R. Simionov, R. Dolchinkov, I. Polinchev (Burgas Free University, Burgas, Bulgaria) The Use of 3D Laser Scanning Technology in Crime Scene Investigations  Obtaining accurate information is crucial for a forensic expert. In this regard, 3D technologies have proven essential for forensic science. Over recent years, these technologies have been actively introduced into investigations, significantly enhancing the scope of forensic research and providing a sufficient evidence base at various stages of the criminal investigation process. Three-dimensional scanning technologies are particularly suitable for documenting trace evidence and traffic accidents, as they enable high-resolution documentation in both enclosed spaces and outdoor environments, creating a more efficient workflow in a shorter timeframe. This has led to the emergence of a specific branch of forensic science: 3D Forensics (3DFS). This paper discusses the capabilities of the Trimble X7 3D laser scanner in investigating a firearms storage site after a fire and subsequent explosions, as well as a traffic accident between a car and a motorcyclist. 4. M. Lovreković, I. Livaja, M. Pavelić (Šibenik University of Applied Sciences, Šibenik, Croatia) A Modern Approach to Agriculture: Survey of Agricultural IoT  The integration of Internet of Things (IoT) technology in agriculture is a step towards smart farming practices that improve productivity and efficiency. Based on a field report, this paper analyzes various aspects of the implementation of IoT in agriculture, such as smart irrigation systems, soil chemistry monitoring, crop protection, livestock tracking, and advanced predictive analytics and pest control. IoT applications enable precise resource management, reduce waste, and optimize crop yields. This paper also discusses the environmental impact of the use of IoT in agriculture. It shows that while initial costs and technical complexity are barriers, long-term benefits clearly outweigh these challenges. 18:00 - 19:00 Upravljanje podacima  1. T. Uusitalo, S. Janaka, C. Stubenvoll, A. Karjalainen, T. Tepsa, M. Mielikäinen (Lapland UAS, Rovaniemi, Finland) Data Transmission of a ROS-based Autonomous Vehicle over a Private 5G Network  Interest in teleoperations and edge-computing in robotics is increasing and 5G satisfies requirements for reliable and real-time data transfer for safety-critical and mobile robots. In contrast to commercial 5G, the network traffic and Base Transceiver Station (BTS) configurations can be fully controlled in private 5G network. This creates optimal conditions for the low latency required for transmitting sensor data and commands between an autonomous Utility Task Vehicle (UTV) in its test area and the remotely controlling PC. The Key Performance Characteristics (KPI) latency and throughput are measured with the autonomous Robot Operating System (ROS) based UTV equipped with a suite of sensors. The ROS core on the UTV is configured to communicate over 5G network. The base station consists of Commercial Off-The-Shelf (COTS) Nokia AirScale radio and baseband products. The 5G Core User Plane (UP) is local, so the user data was processed close to the edge of the network, allowing lower latency communication. The Control Plane (CP) is hosted in Nokia data center for centralized management of the national Nokia Test Network Finland. Our overall mean Round-Trip Time (RTT) without optimization over ROS is promising with 12.318 ms. 2. O. Mitrović, V. Tadić (Zagreb University of Applied Sciences, Zagreb, Croatia) SMB over QUIC: A Performance Evaluation  Ever-growing usage and adaptation of HTTP/3 in web traffic uses Quick UDP Internet Connections (QUIC) as transport protocol. QUIC benefits include reduced latency, increased security and enhanced performance compared to TCP or UDP protocols. While it’s most popular for use in HTTP/3, QUIC’s versatility extends to other domains, such as file transfer. In this paper, we evaluate Microsoft’s implementation of SMB over QUIC compared to the traditional SMB protocol over TCP. We examine protocol behavior under conditions of network congestion, scalability across multiple clients, and resource utilization such as CPU and memory load on both the server and client ends. By comparing SMB over QUIC and SMB over TCP, we aim to identify the benefits and trade-offs associated with adopting QUIC for enterprise file sharing. The results of our study provide insights into the performance characteristics of QUIC protocol in file transfer scenarios. This paper contributes to the overall understanding of QUIC’s practical applications offering guidance for optimizing file transfer systems. 3. A. Periola (Cape Peninsula University of Technology , Cape Town, South Africa), A. Alonge, K. Ogudo (University of Johannesburg, Johannesburg, South Africa) Space Based Data Centers – Communication Window Length Analysis from an African Perspective  The use of space based data centers (SDBCs) is beneficial for realizing future environment-friendly networks. This is because they do not require the use of earth’s water resources for cooling. In addition, SBDCs are important entities in future networks. This is because they are able to provide content access to subscribers in landlocked and disaster prone locations with low access to conventional terrestrial data centers. The research recognizes the importance of the SBDC uptime that should be considered alongside the use of SBDCs. The research aims to analyze the uptime of SBDCs via the consideration of the communication window length considering different ground locations. The ground locations considered have high susceptibility to seismic events and are hosted in Africa. Research shows that a minimum and maximum SBDC uptime are 419.4 minutes, and 435.6 minutes for select African landlocked countries, respectively. The minimum and maximum SBDC uptime are 329.6 minutes, and 435.6 minutes for select African seismic event prone countries, respectively. 4. S. Miftari (South East European University, Tetovo, Macedonia), A. Aliu (South East European University, Skopje, Macedonia) Client-Server Architecture for ERP Systems: A Comparative Analysis of Laravel, Django, and ASP.NET Core  This study presents a comparative analysis of three prominent frameworks: Laravel, Django, and ASP.NET Core for developing ERP systems within a client-server architecture. The research underscores how selecting the right framework influences scalability, modularity, and maintainability, which are essential for streamlining organizational workflows and improving decision-making. Laravel is praised for its simplicity and developer-friendly ecosystem, making it suitable for small to medium ERP solutions prioritizing rapid development and cost-efficiency. Django, adhering to its philosophy of “the web framework for perfectionists with deadlines” excels in security, scalability, and handling complex, data-driven applications, fitting for large-scale, high-traffic ERP deployments. Meanwhile, ASP.NET Core, with Microsoft ecosystem integration, offers exceptional performance, scalability, and compatibility with Windows backend services, making it ideal for enterprise-level ERP solutions. The paper evaluates these frameworks through performance benchmarks, case studies, and metrics such as request handling, database support, and scalability mechanisms. Results indicate that no single framework universally outperforms the others. Instead, each addresses distinct project requirements. Aligning the framework choice with business objectives and technical demands empowers organizations to develop flexible, future-ready ERP solutions.

Osnovni podaci:

Željka Car (Croatia), Stjepan Golubić (Croatia), Dragan Jevtić (Croatia), Branko Mikac (Croatia)

Slaviša Aleksić (Germany), Krešo Antonović (Croatia), Gordan Gledec (Croatia), Miran Gosta (Croatia), Darko Huljenić (Croatia), Oliver Jukić (Croatia), Erich Leitgeb (Austria), Velimir Švedek (Croatia)

Željka Car (Croatia), Vlado Delić (Serbia), Saša Dešić (Croatia), Renato Filjar (Croatia), Tihana Galinac Grbac (Croatia), Stjepan Golubić (Croatia), Vlasta Hudek (Croatia), Robert Inkret (Croatia), Dragan Jevtić (Croatia), Admela Jukan (Germany), Ozren Jureković (Croatia), Marko Lacković (Croatia), Dražen Lučić (Croatia), Branko Mikac (Croatia), Mladen Sokele (Croatia), Darko Švelec (Croatia), Antonio Teixeira (Portugal), Miroslav Vrankić (Croatia), Mario Weber (Croatia)

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Željka Car 
Fakultet elektrotehnike i računarstva
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E-mail: zeljka.car@fer.hr
 

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