Virtual Event

Event program

Wednesday, 9/29/2021 3:00 PM - 6:45 PM, Online 3:00 PM - 3:45 PM Invited Lecture  • Vedrana Miholić, Krešimir Musa (CROZ Ltd, Zagreb, Croatia) Better Normal – a Myth or Reality?  3:45 PM - 4:00 PM Coffee break  4:00 PM - 5:15 PM Implementation of 5G Technology  1. D. Lučić, P. Mišević (Croatian Chamber of Economy, Zagreb, Croatia) An Impact of Implementation of 5G Technology on Information Security  The paper deals with a possible impact of implementation of the fifth generation of technology (5G) in mobile telecommunications networks on information security. Information security is one of top concerns among the companies and institutions which are in the process of digital transformation. Internet of Things (IoT), based on 5G, brings a new set of issues, such as: security, safety, privacy and cyber-systems robustness. Therefore, it is outmost important that use of IoT applications in 5G mobile telecommunications networks from start includes protection of critical infrastructure, private and business sensitive information. A possible impact on both information and cybersecurity in the mobile telecommunications networks in Republic of Croatia have been briefly analysed. Some measures are listed and described in order to decrease vulnerabilities and mitigate security and privacy threats under 5G. The role of national regulatory authorities related to information security in the process of implementation of 5G technology have been described in the case of Republic of Croatia. 2. M. Jurcevic, I. Vitas (University of Zagreb Faculty of Electrical Engineering and Computing, Zagreb, Croatia) 5G-Connected Drone for Public Road Safety - Research Challenges and Future Research Roadmap  5G mobile communication infrastructure attracts increasing attention of stakeholders going beyond only interconnection of people and increasingly serve to connect and manage 5G-enabled IoT devices. Among others, unmanned aerial vehicles (UAVs) or systems (UAS) already rely on 5G communication infrastructure and in the near future are envisioned to use it even more. 5G systems already support a wide-variety of different applications, such as remote healthcare, self-driving ground vehicles, virtual or augmented reality, drones, surveillance and many more. Among these is the high-resolution video surveillance using drones for different purposes. In road traffic analysis, one of the most important public safety applications, the low compressed or uncompressed video stream can greatly improve the analysis and traffic incident detection performance. There are multiple challenges regarding streaming of data to and from UAVs for monitoring and control applications. This paper provides an overview of the current research in the area of UAV command and control using 5G systems describing basic concepts and challenges. We review some of the latest research in regard to real-time high-resolution video transfer as well as control of the UAV via 5G mobile network. A brief discussion of experiments on the 5G private campus network communication between a drone and a ground analytical system is presented. 3. E. Ivanova, I. Penkov, T. Iliev, I. Stoyanov (University of Ruse "Angel Kanchev", Ruse, Bulgaria) Data Traffic Models for Broadband Backbone in 5G Networks  Broadband backbone for the 5-th generation networks is essential for QoS to the end customer. It must be fulfilled in any conditions. The Quality of Service (QoS), that must be observed in this type of network is the probability of blocking, less than 10-12. Considering the ultra-high speed, it is not allowed any technical problem. The construction of the traceroute and the selection of devices, must take into account many different parameters, such as reliability, price, terrain, climatic features, region and loads. MINI-LINK 6352 is one of the devices, which supports those conditions. Traffic models, queue and the parameters of equipment is presented in the paper, as a part of broadband network traceroute in the North Bulgaria. 4. K. Kainrath, M. Gruber, A. Hinze, H. Flühr (FH JOANNEUM, University of Applied Sciences, Graz, Austria), E. Leitgeb (Technical University of Graz, Graz, Austria) Modification of a Commercial Fixed-Wing-Unmanned Aerial Vehicle with Mobile Radio for beyond Visual Line of Sight Operability  With the introduction of the new European Union Aviation Safety Agency regulations for Unmanned Aerial Vehicles in January 2021 beyond visual line-of-sight operations will be possible. Since there are no legal requirements for this but only recommendations for Unmanned Aerial Vehicles (UAV) hardware, a possible approach for this is presented in this paper. The system architecture used, and the modification of the fixed-wing UAV are discussed. For the UAV data link, a combination of a classical remote control from the model sport sector and fourth generation mobile radio was used. Finally, results of the test flights are presented. 5:15 PM - 5:45 PM Coffee break  5:45 PM - 6:45 PM Artificial Intelligence  5. T. Iliev, E. Ivanova, I. Stoyanov (University of Ruse "Angel Kanchev", Ruse, Bulgaria), G. Mihaylov (University of Telecommunications and Post, Sofia, Bulgaria), I. Beloev (University of Ruse "Angel Kanchev", Ruse, Bulgaria) Artificial Intelligence in Wireless Communications – Evolution Towards 6G Mobile Networks  With the deployment of the 5G in wireless communications the researchers’ interest is focused on the sixth generation networks. This forthcoming generation is expected to replace 5G network by the end of 2030. The Artificial intelligence is one of the leading technologies in 5G, beyond 5G and future 6G networks. Intelligence is endowing the tendency throw open the capabilities of the 5G networks and the future 6G mobile wireless networks by leveraging the universal infrastructure, open network architectures, software-defined networking, network function virtualization, multi-access edge computing, vehicular network, etc. This discussion is aimed at providing, in a comprehensive manner, how artificial intelligence can be integrated into different applications and finally we analyzed and discussed the opportunities and main technical challenges of the wireless communication standards and present a novel approaches and recent results that will encourage the development and implementation of the sixth generation networks. 6. A. Rista, A. Kadriu (SEE University/Faculty of Contemporary Sciences and Technologies, Tetovo, Macedonia) CASR: A Corpus for Albanian Speech Recognition  This research paper introduces CASR, a Corpus for Albanian Speech Recognition, aimed for training and evaluating Automatic Speech Recognition for Albanian language. Taking into account language characteristics of Albanian language (mostly of spoken language) such as: dialect, socio-linguistic and ethno-cultural characteristics, or even physical specifics of the personal vocal system, this corpus is based on from bible’ audiobook, comprising 20 hours of transcribed audio data, where transcripts and audios are in the Albanian standard language. An end-to-end speech recognition model based on deep learning is implemented to test and evaluate this corpus. We show that acoustic models trained on CASR give satisfactory results. The corpus will be freely available for independent research and provides a valuable resource for research on Albanian ASR. 7. A. Rista, A. Kadriu (SEE University/Faculty of Contemporary Sciences and Technologies, Tetovo, Macedonia) End-to-End Speech Recognition Model Based on Deep Learning for Albanian  Deep learning technology nowadays is considered as of the most advances in machine learning that have led to significant and widespread improvements in how we interact with the world. Deep learning is a set of methods that permits machines to learn from data without human supervision and intervention. Recently Deep Learning is well known for its applicability in speech recognition. This stems from the flexibility and predicting power of deep neural networks as well as accurate enough to be useful outside of carefully-controlled environments. This research paper introduces an end-to-end speech recognition model applicable for Albanian language as a low resource scenario based on deep learning. This model is based on Recurrent Neural Network (RNN) architectures with different approaches to model speech recognition, using Pytorch as a tool for implementation. It is composed by two main neural network modules - N layers of Residual Convolutional Neural Networks (ResCNN) to learn the relevant audio features, and a set of Bidirectional Recurrent Neural Networks (BiRNN) to leverage the learned ResCNN audio features. To train and evaluate this model we will use a corpus in Albanian created for this purpose, which comprises 20 hours of transcribed audio data. The experimental results show a very satisfactory word error rate. 8. M. Stojčić (University of East Sarajevo, Faculty of Transport and Traffic Engineering, Doboj, Bosnia and Herzegovina), M. Banjanin (University of East Sarajevo, Faculty of Philosophy, Pale, Bosnia and Herzegovina), Z. Ćurguz, A. Stjepanović (University of East Sarajevo, Faculty of Transport and Traffic Engineering, Doboj, Bosnia and Herzegovina) Machine Learning Model of Communication of Physical and Virtual Sensors in the Mobile Network on the Motorway Section  The effects of the communication of physical and virtual sensors on the performance of the mobile network can be assessed through several Key Performance Indicators (KPI), of which the Average Downlink Throughput (ADT) is very important. The paper presents an approach for measuring this indicator in a mobile network using a Machine Learning Model (MLM) which uses contextual variables related to traffic class, user location, time period, signal strength, base station. The geographical area of the m:tel network on the section of the “9th January” motorway, a key road in the Republic of Srpska, BiH, was selected for the case study in the research. The measured ADT performance reflects the degree of Quality of customer Service (QoS) in the observed space. The proposed model was created in the SPSS software package, and its training and testing were performed based on data collected by field measurements. The research results show that the model can perform measurement and prediction with satisfactory accuracy while increasing the data set for training and testing by the Data Augmentation (DA) method. In addition to the MLM model, the paper proposes a wireless sensor network model for the acquisition of contextual data along the motorway. Thursday, 9/30/2021 9:00 AM - 12:45 PM, Online 9:00 AM - 9:30 AM Network Management  1. D. Valenčić, V. Pupovac (University of Applied Sciences Velika Gorica, Velika Gorica, Croatia) Interoperability Test of NETCONF Capabilities  NETCONF is an important component of SDN (Software Defined Networking) architecture (as defined in RFC 7426) and network programmability and automation. ETF has defined the NETCONF (Network Configuration Protocol) standard in RFC 4741 in December 2006 and improved it in June 2011 in RFC 6241 (which is the currently active standard). NETCONF was created based on the requests of the network operators (defined in RFC 3535 in June 2002) for a standard protocol for the configuration of network devices. NETCONF defines the mechanisms of installing, manipulating, and deleting the network device configurations. NETCONF uses RPC messages, SSH for the transfer of messages between the server and the client; it has its defined set of operations and it uses YANG for data modelling. NETCONF defines the initial basic set of operations and additional capabilities. Capabilities are additional functions of the NETCONF device (of client and server) that may but do not have to be implemented by the network devices. In this paper will be shown an overview of the capabilities of NETCONF protocol. The objective of this paper is to present the results of the interoperability lab where the support for NETCONF capabilities have been tested on router/switch (R/S) devices of major network equipment manufacturers. This paper describes the test environment and how the laboratory testing of the NETCONF capabilities of virtual network R/S devices was performed. 2. O. Jukić (Virovitica College, Virovitica, Croatia), R. Filjar (Krapina University of Applied Sciences, Krapina, Croatia), I. Heđi, E. Ciriković (Virovitica College, Virovitica, Croatia) MQTT-like Network Management Architecture  Network management correlates data from different sources. It enables integrated view on telecommunication network and service status to network personnel. Typically, the same management data are used by number of network management platforms and tools. Unfortunately, these data are very often collected in parallel, from the same sources. It overloads network and network management systems. In this paper we have proposed an MQTT-like architecture of network management system. MQTT is a protocol that uses a publish and subscribe model. It allows „publisher“ to send messages belonging to specific topic to one or multiple „subscribers“ that are subscribed to the topic. However, there is no direct connection between these entities. Central point of MQTT architecture is a „broker“, acting as router between publishers and subscribers. In architecture proposed, publishers are software agents collecting data from managed objects (network elements). Data are published to subscribed entities (e.g. network management applications). Every subscriber can process data received and publish processing results, acting as a publisher of data from higher abstraction level. Main improvement of MQTT architecture is that broker can store published data for a certain amount of time. This promotes broker as a central point from which is possible to obtain management data. In the case of crisis (e.g. earthquake or flooding), proposed architecture allows external stakeholders to obtain data about network availability in real-time manner. 9:30 AM - 10:45 AM Web Applications  3. T. Jakopec, Ž. Hrkač (Filozofski fakultet Osijek, Osijek, Croatia) Use of Image File Format WebP on Websites in Croatian top Domains  The paper deals with the use of WebP image format on web pages within the Croatian domain (.hr). Overview of usual image formats, JPEG, PNG, GIF and SVG, is given, but the emphasis is on the WebP format, which is the topic of the research. Its main features are described and the ways in which images are converted to WebP format from other formats, as well as the ways of using WebP format on web pages are listed. For the purposes of the research, a tool for collecting WebP images from web pages was developed. The mentioned tool found, identified and downloaded WebP images from the home pages of network sites within the .hr domain. Image data was stored in a database so that it could be analyzed further. The research showed that 1.04% (872 web pages) with the Croatian domain (.hr) use the WebP image file format. The largest number of web pages, 371 of them, use between 2 and 5 WebP images, while the smallest number of pages (10 of them) use over 50 WebP images. A manual review of web pages that have a larger number of WebP images lead to the conclusion that web shops mostly use this format. Furthermore, a review of WebP images showed that WebP is mostly used in cases where compression with data loss is suitable, for example, for photos. 4. L. Žuliček (Netgen, Zagreb, Croatia), S. Tomić, I. Bosnić (University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia) Adapting Modularized Web Applications to Web Accessibility Standards  This paper presents a web application designed to evaluate the accessibility of a modular Content Management System called Quilt CMS, widely used as a solution for Croatian higher education institutions. Aimed primarily at web developers, this tool is focused not on evaluating subpages as whole documents, but on modules of a Quilt CMS instance used in their context, providing cleaner analysis and easier code refinement. The modules were evaluated using AATT - Automated Accessibility Testing Tool, composed of Axe, Chrome and HTML Code Sniffer accessibility evaluation libraries. The modules’ code is accessible via the newly created, customizable REST API methods, providing a solution easily extendible to other web platforms. The web accessibility of modules is evaluated according to the following accessibility guidelines: Web Content Access Guidelines (WCAG 2.0 and 2.1), Web Accessibility Initiative - Affordable Rich Internet Applications (WAI-ARIA) and Section 508. The analysis was done on one of the websites using this CMS, but is applicable in other instances due to module code sharing. The results were used to improve the source code of selected Quilt CMS modules, providing a higher level of accessibility norms’ implementation. 5. N. Caporusso (Northern Kentucky University, Cincinnati, United States) An Improved PIN Input Method for the Visually Impaired  In recent years, biometric identification (e.g., using fingerprint, iris, and face recognition) has been introduced as a convenient authentication method for unlocking access to personal technology (e.g., smartphones and smart locks) and restricted areas in offices and buildings. Nevertheless, passcodes based on a Personal Identification Number (PIN) are still the most common authentication method in most systems, including mobile devices, Automated Teller Machines (ATMs), and Point Of Sale (POS) payment systems. Unfortunately, PIN-based authentication methods have many vulnerabilities. Several studies have shown that, among other types of attacks, PINs are particularly susceptible to social engineering techniques, such as shoulder surfing. This especially impacts individuals who are blind, who can be unaware of the presence of nearby attackers or malicious technology (e.g., hidden cameras). Although recent research in accessibility introduced new methods for improving the trade-off between security and accessibility, most systems have significant residual vulnerabilities. In this paper, we introduce a new method for improving security in PIN-based authentication systems that eliminates the threats posed by shoulder surfing while maintaining a low level of complexity. We detail the system and present the results of a user research study that shows the advantages of our system compared to the state of the art. 6. R. Di Nardo Di Maio (Universita' degli Studi di Padova, Padova, Italy), M. Guerar (Universita' degli Studi di Genova, Genova, Italy), M. Migliardi (Universita' degli Studi di Padova, Padova, Italy) ascCAPTCHA: an Invisible Sensor CAPTCHA for PCs Based on Acoustic Side Channel  Our growing reliance on the digital world has caused a similar growth in the sophistication of bots trying to impersonate humans. The most classic tool to tell human and computers apart is the CAPTCHA, however CAPTCHAs based on cognitive challenges are becoming either insecure or very difficult to be solved by humans too. A possible solution is leveraging the rich sensor set of modern mobile devices to capture the physical nature of humans while they are interacting with the system, however, traditional PCs do not have the same opportunity. In this paper we describe ascCAPTCHA, a CAPTCHA based on an acoustic side channel that leveraging a simple microphone is compatible with PCs lacking the rich sensor set of smart devices. 7. A. Kešelj (University of Dubrovnik, Dubrovnik, Croatia), M. Žilak, I. Topolovac, I. Rašan (University of Zagreb Faculty of Electrical Engineering and Computing, Zagreb, Croatia) The impact of legislation on website accessibility: Croatian case-study  The potential of web usage as support for people with disabilities has been long recognized. Given the fact that the population is aging and that the life expectancy of people with disability has extended, it is important to take appropriate measures to ensure that all users have equal access to digital services provided by the web. The importance of the web accessibility has been recognized by many countries around the world which legislated how public content must be designed in order to be accessible. One of these country is also Croatia. This paper provides information about how legislating the law has affected the accessibility of the websites. Also, researches of the accessibility of the web pages with the Croatian catalogue of web pages from previous years with the current year will be compared and discussed. 10:45 AM - 11:15 AM Coffee break  11:15 AM - 12:15 PM Process and Solution Innovations  8. D. Šimunić, A. Višković, D. Žubrinić (Faculty of Electrical Engineering and Computing, Zagreb, Croatia) Creativity and Innovation Processes in Complex Sustainable City Environments: „Smart Creative City” Concept  Creativity is an essential „gluing” component for generation and sustainability of the „upgraded” concept of the next generation of citizens' life in the smart city. Creativity enables novel unique ideas. Since every human environment is specific and of very individual nature, with as many differences as possible related to all the characteristics of citizens in one household, or in a village, in an urban quarter, in a city, in a state, in a region or on a continent, power of creativity in all these nano-, pico-, micro- or mega-environments is of a paramount importance for a creation of the smart tailor-made city. The second term in the title, innovation, enables implementation of the given creativity by forming a new idea, solution, process, product, series of products, human-made environment, or, as a final goal, the smart city that will support happy and long life of all citizens. The article describes the creativity phases and innovation types in the complex sustainable and emerging technology environment of the “Smart Creative City”. 9. A. Višković (Energy Platform Living Lab Zagreb, Zagreb, Croatia), V. Franki (Faculty of engineering Rijeka; Energy Platform Living Lab Zagreb, Rijeka, Croatia) Value Co-creation through a Digital Platform Business Model in the Power Sector  Digital transformation is occurring across the globe swiftly altering processes and revolutionizing traditional businesses. An increasing number of companies are now realizing the potential and significance of digitalization. Seven out of ten most valuable companies globally are now operating on a platform business model. In most cases, platform-based companies act as matchmakers between supply and demand. The power sector is no exception. However, the creation of a successful platform in the power sector is a much more complicated task. A platform operating in the energy arena needs to be able to draw real-time data from countless physical components of the system. This data needs to be used to optimize system operation and resolve any disturbances on the grid. Only after enabling a digitally controlled, decentralized flow of energy in real-time can the second layer of the platform be constructed: a digital ecosystem. The paper discusses how digitalization will alter utility business models and how energy companies can benefit from using new digital solutions (such as asset management systems, customer billing and information apps, predictive analytics, etc.) in creating added value. In addition, it outlines the strategic significance of creating a digital platform and an open innovation ecosystem for energy utilities. 10. A. Višković (Energy Platform Living Lab Zagreb, Zagreb, Croatia), V. Franki (Faculty of engineering Rijeka; Energy Platform Living Lab Zagreb, Rijeka, Croatia), A. Damiano (University of Cagliari, Cagliari, Italy) Integrated Strategic Action for Facilitating the Electrification Process  Energy sector is at crossroads facing fundamental changes across its entire supply chain. The surge of new technological solutions revolutionizes the way we generate, transmit and consume energy. One of the major driving factors of transformation is the process of electrification. In order to foster and facilitate the electrification process, a multi-level strategy needs to be implemented. The aim of this paper is twofold. First, we aim to identify the forces of disruption and key areas of technological innovation in the energy sector. Second, we center on the process of electrification. In this context, five key focus areas that should be the center of a national strategic action plan aimed at reaching a sustainable energy future are determined. In order to reap all the potential benefits of the electrification process it is crucial to adopt emobility, improve energy efficiency, create synergy between corporate and research networks, invest in research and development to strengthen national capabilities in electric frontier technologies and raise awareness regarding the benefits of electrification. We argue that utility providers and distribution system operators act a key role in enabling the deployment of new solutions and the development of the sector as a whole. 11. N. Bjelčić (HT d.d., Zagreb, Croatia), M. Blažeković (HT d.d., Osijek, Croatia), D. Švelec (---, Osijek, Croatia) Smart doors as a solution for the independent life of people in need  The paper discusses the development of an IoT smart door application adapted to people with special needs, ie anyone who has difficulty opening the front door independently. Special emphasis is placed on people with disabilities and on pandemic conditions. The new innovative application design is based on the principles of universal design in the broadest possible sense. All phases of application development are presented, from the idea of innovative and sustainable design of the application itself through the analysis of the needs of a wide range of potential users, various technical possibilities of implementation including all levels of communication, from proximity to 5G network, and application sustainability analysis. The design brings several innovative conceptual and technical solutions that contribute to the attractiveness, applicability and sustainability of the application. 12:15 PM - 12:45 PM Environmental Protection  12. J. Muratović, K. Josić, S. Papić (Algebra University College, Zagreb, Croatia) Analysis of the Impact of Electromagnetic Interference on the Performance of a Household Wireless Network  Today, more than 90% of households in the EU have internet access and use Wi-Fi technologies to a large extent. With the increasing penetration of the Internet of Things, access to the Wi-Fi network is under increasing load. In this paper, an analysis of the living space of a typical multi-member family in an urban environment in Croatia and the impact of different sources of electromagnetic radiation on the performance of a Wi-Fi network is made. Primarily 2.4 GHz frequency spectrum was analyzed, and the influence of different individual sources of electromagnetic radiation on the quality of communication via a Wi-Fi network was determined using different communication analysis tools. The contribution of this paper is to bring into focus common, invisible to us humans, communication problems due to the overcrowded 2.4 GHz space of a typical urban household, which can certainly affect the performance of the Internet of Things environment in new more modern homes. Also as a result of this research are recommendations and guidelines on how to distribute and use sources of electromagnetic radiation in the household to avoid major interference to the Wi-Fi communication signal. 13. B. Tanatarec (Centre for Environmental Measurements LLC, Zagreb, Croatia), D. Šimunić (Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb, Croatia) Distribution of High-frequency Electromagnetic Fields on the Basis of Total Exposure Quotients  Extensive non-ionizing high-frequency electromagnetic field (HF EMF) measurements were carried out in Republic of Croatia during 2018. Measurements of electric field strength on 812 locations were analysed. This paper focuses on distribution of HF EMF given on the basis of ICNIRP`s total exposure quotients (TEQ). Main objective is to establish which HF EMF sources affect TEQ values and to create classification of human exposure to HF EMF in respect to TEQ. Collocated HF EMF sources were also analysed, because they dominantly affect TEQ values on every point of investigation. There is an ongoing need for occasional controlled measurements of HF EMF, because on some points of investigation values of TEQ can exceed the established criteria and can have potentially negative effect on human health. Those locations are usually collocated with different HF EMF sources, which can be found on top of buildings or on one or more masts built very close to one another.

 

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

Slaviša Aleksić (Germany), Krešo Antonović (Croatia), Gordan Gledec (Croatia), Darko Huljenić (Croatia), Oliver Jukić (Croatia), Ozren Jureković (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), Marko Lacković (Croatia), Dražen Lučić (Croatia), Branko Mikac (Croatia), Mladen Sokele (Croatia), Dina Šimunić (Croatia), Darko Švelec (Croatia), Miroslav Vrankić (Croatia), Antonio Teixeira (Portugal), Mario Weber (Croatia)

The discount doesn't apply to PhD students.

Zeljka Car 
University of Zagreb
Faculty of Electrical Engineering and Computing
Unska 3
HR-10000 Zagreb, Croatia

Phone: +385 1 6129 787
Mobile: +385 91 507 3452
E-mail: zeljka.car@fer.hr

The best papers will get a special award.
Accepted papers will be published in the ISSN registered conference proceedings. Presented papers in English will be submitted for inclusion in the IEEE Xplore Digital Library.
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There is a possibility that the selected scientific papers with some further modification and refinement are being published in the Journal of Computing and Information Technology (CIT).