https://ojs.nbu.bg/index.php/YT/issue/feed Yearbook Telecommunications 2025-08-29T13:25:54+00:00 Technical secretary, Yearbook Telecommunications ytelecom@nbu.bg Open Journal Systems <p style="margin: 0cm; margin-bottom: .0001pt;">Yearbook Telecommunications is an&nbsp;open access, double-blind electronic scientific publication, one booklet per year within the volume, published by the Department of Telecommunications at New Bulgarian University. (<a href="https://telecommunications.nbu.bg/download/telekomunikatzii/5-gdtk-manuscript-review-form-en.doc" target="_blank" rel="noopener">Manuscript Review Form</a>). The thematic sphere of the Yearbook Telecommunications focuses on the different areas of information and communication technologies.</p> <p style="margin: 0cm; margin-bottom: .0001pt;">Manuscripts included in Yearbook Telecommunications are received from 1 September of the previous calendar year to 31 July of the current calendar year. Yearbook Telecommunications is published annually between 01.09 and 30.09 of the current calendar year (<a href="https://telecommunications.nbu.bg/download/telekomunikatzii/8-presubmission-checklist-for-manuscript-en.pdf" target="_blank" rel="noopener">Presubmission Checklist for Manuscripts</a>).</p> <p style="margin: 0cm; margin-bottom: .0001pt;">Yearbook Telecommunications is indexed and referenced by&nbsp;<strong>CEEOL (Central and Eastern European Online Library GmbH)</strong>.</p> https://ojs.nbu.bg/index.php/YT/article/view/1145 A synergy between gemology, mineralogy and technical sciences 2025-08-28T12:54:16+00:00 Yoana Ivanova yivanova@nbu.bg <p>The purpose of this paper is to explore the synergistic interactions that exist between certain fields in gemology and mineralogy on the one hand and in technical sciences on the other to highlight innovative applications of minerals, precious and semi-precious stones in telecommunications, medicine, optical and laser technologies, electronics, and microelectronics. A key aspect of gemological and mineralogical research is the accurate identification of an object through modern methods involving artificial intelligence systems and, in particular, artificial neural networks for efficient recognition. The description of the experimental processes is proved by software-realized examples of identification of mineralogical samples and simulation of sensor devices, the results of which contribute to the formulation of the justification of the scientific-applied value of the research.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1146 Specifics in the provision of integrated services in the conditions of convergence of IoT (Internet of Things) and AI (Artificial Intelligence) technologies 2025-08-28T13:09:43+00:00 Tsvetelina Simeonova tsvsimeonova@nbu.bg <p>The aim of the work is to research the specifics of the provision of integrated services in the conditions of convergence of Internet of Things (IoT) and Artificial Intelligence (AI) technologies. Results have been obtained related to highlighting the features of AI-based IoT services, as well as the specificity of machine learning technologies in the provision of IoT services. Clarifying the specifics of real-time simplified intelligence technologies and federated learning stand out as contributing moments.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2025 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1147 Maximizing Efficiency: Harnessing second-hand computer systems for parallel computing in university micro cloud 2025-08-28T13:38:11+00:00 Georgi Petrov gpetrov@nbu.bg Rosen Pasarelski rpasarelski@nbu.bg David Yavorov david.fil@abv.bg Mile Milanoski m_mile@mail.bg <p>This article explores the utilization of second-hand computer systems in the context of parallel computing for physics simulations at New Bulgarian University. With the increasing demand for computational power in scientific research, particularly in the field of physics, the affordability and accessibility of high-performance computing (HPC) resources become crucial. However, acquiring brand-new HPC systems can be cost-prohibitive for many laboratories and institutions. In this paper, we investigate the feasibility and efficacy of repurposing second-hand computer hardware to construct parallel computing clusters tailored for physics simulations. We discuss strategies for selecting, refurbishing, and integrating these systems into a parallel computing environment, highlighting the potential benefits and challenges. Through case studies and performance evaluations, we demonstrate the practicality of this approach in achieving significant computational capabilities at a fraction of the cost of new systems. Our findings underscore the importance of resourcefulness and sustainability in advancing computational physics research, paving the way for cost-effective solutions to address complex scientific challenges.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2025 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1148 Conceptual design of an adaptive architecture for a radio-television center 2025-08-29T09:21:18+00:00 Yoana Ivanova yivanova@nbu.bg <p>The aim of the paper is the construction of an adaptive conceptual architecture of a Radio-television Center (RTTVC) and, in particular, of a hardware infrastructure in an Enterprise Architect software environment. The research presented in the development is a continuation of the author's previous publication (Telecommunications Yearbook, Volume 10, 2023), which focuses on integration techniques in digital video production with application in the television and film industries. In this case, attention is paid to the main priorities in the construction of a Radio-television center (RTVC), among which are the production, broadcasting and management of radio and television content. The proposed RTVC basic architectural model can contribute to providing a stable infrastructure for the transmission of audio, video and other multimedia services with high quality. The conceptual architecture of the RTVC hardware component is built according to the optimal requirements for connecting the individual devices.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1149 The global artificial intelligence market 2025-08-29T09:44:11+00:00 Tereza Stefanova tstefanova@nbu.bg <p>The artificial intelligence (AI) market encompasses a huge number of industries and many other areas that will in some aspect adopt artificial intelligence into their business structures. Global market reports – size, share and trends based on technology, end-use, regions and segment forecasts are used to analyze Artificial Intelligence capabilities. The article examines the global artificial intelligence market by hardware, software and service offerings, by technology, by industry, and also the global market of generative and explainable AI. Reports of market research and analysis companies were used. AI market trends over the next decade are outlined. The more significant factors contributing to the growth of the AI industry are noted.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1150 Automated monitoring and analysis of network traffic in Linux using scripts and system tools 2025-08-29T09:53:05+00:00 Stanislav Peltekov peltekov.stanislav@gmail.com <p>Effective network monitoring is vital for ensuring optimal system performance, reducing latency, diagnosing bottlenecks, and detecting anomalous behavior that could indicate security threats. With its flexibility, reliability, and ubiquity, Linux serves as an ideal platform for deploying robust monitoring solutions tailored to diverse system needs. This project focuses on automating the collection and analysis of network traffic data in Linux environments. By leveraging only built-in system tools and utilities, the solution provides a cost-effective, lightweight, and easily deployable monitoring framework. The integration of real-time data logging and graphical visualization ensures actionable insights for system administrators and IT professionals, reducing manual intervention and enabling proactive management. In addition to leveraging Linux tools, the development process of this project was significantly accelerated through the use of ChatGPT.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1151 Study of data center disaster and emergency plan 2025-08-29T10:09:01+00:00 Rosen Pasarelski rpasarelski@nbu.bg Alena Dobreva alenadobreva@abv.bg <p>It is extremely important for every data center to have a comprehensive disaster and emergency plan to ensure the continuity of operations and the safety of personnel and data in the facility. The preparation of a disaster and emergency plan should follow a number of points and have clearly formulated goals and objectives. The goals of the plan can be systematized as follows: Data Center Continuity; Personnel Safety; Data and Asset Protection; Timely Recovery; Effective Communication; Compliance and Regulatory Compliance. The objectives of the plan can be formulated as follows: Risk Mitigation; Emergency Response; Evacuation and Safety; Data Protection and Recovery; Security Measures; Resource Availability; Communication Plan; Training and Exercises; Documentation and Reporting; Plan Maintenance; Regulatory Compliance; Budget Allocation. By defining these clear goals and objectives, the data center disaster and emergency plan will serve as a strategic framework for addressing a wide range of potential issues and ensuring the resilience of the center's operations.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1152 Research of the implementation of modern wireless broadband electronic communication services 2025-08-29T11:48:38+00:00 Teodora Pasarelska tpasarelska@mtitc.government.bg <p>The article aims to analyze various aspects of the implementation of modern wireless broadband electronic communication services, focusing on spectrum management, regulatory framework and technological innovations. The processes of licensing and allocation of radio frequency spectrum are studied as important factors for the successful provision of broadband services. The main contribution of the article is to clarify the role of public-private partnerships in the development of these services and to propose strategies for improving the infrastructure and organizational part of the implementation. The article also examines the integration of new technologies such as 5G and IoT, which offer new opportunities for the development and expansion of wireless networks. An analysis is made of operational management and the factors that determine the effectiveness of the implementation. The results of the study offer useful recommendations for improving the processes related to the implementation of modern wireless broadband services and emphasize the importance of innovation and strategic planning to achieve long-term results.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1153 Temperatyre instrumentation technologies 2025-08-29T11:59:15+00:00 Velimir Vasilev velimirvasilev@gmail.com <p>The present article presents a review of technologies and means in the field of temperature measurement for the needs of various production and other processes. The article covers widely used methods and their technological means, such as: thermocouples, bimetallic and other types of thermometers, with a focus on widely used integral sensors with digital interfaces for commercial applications and comparing basic technical parameters. From this presentation we hope that the summarized data can serve in the selection of integral temperature sensors (contact and non-contact).</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2025 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1154 Methodology for designing, building, configuring, and costing networks for small and medium-sized enterprises 2025-08-29T12:32:02+00:00 Yana Doncheva yanadonch@gmail.com Georgi Petrov gpetrov@nbu.bg <p>This publication presents a simplified methodology for designing, building, configuring, and costing networks for small and medium-sized enterprises (INTRANET), taking into account current trends in remote work (EXTRANET). It discusses key aspects, as well as the subsequent monitoring and maintenance of the network. Finally, a practical example is provided, applying the simplified methodology for the costing of network components.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1155 Impact of new technologies and artificial intelligence in brand management 2025-08-29T12:45:28+00:00 Alena Dobreva alenadobreva@abv.bg <p>The topic of this article was chosen due to its relevance and the opportunity to explore various aspects of new technologies and artificial intelligence (AI) in marketing and customer service. Brand management plays a crucial role in modern business, as building, maintaining and developing a brand is essential for attracting and retaining customers. However, the integration of AI also raises important concerns about privacy, transparency and social responsibility, which are crucial for maintaining consumer trust. The article aims not only to show the innovative potential of AI, but also to highlight its role in building sustainable and successful brands. Existing practices are analyzed, as well as new opportunities that can be implemented as the technology continues to develop, the challenges and limitations of artificial intelligence, the risks and limitations associated with AI are examined, emphasizing the balance between automation and maintaining an emotional connection with customers.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1156 Main aspects of renewable energy integration 2025-08-29T12:58:09+00:00 Veselin Chobanov vchobanov@nbu.bg Rosen Pasarelski rpasarelski@nbu.bg <p>The transition in the energy sector is essential for reducing carbon emissions and building a sustainable future. In this process, wind and solar energy play a leading role, offering environmentally friendly solutions. Their effective integration into the power system requires addressing various technical, operational, and regulatory challenges. This study examines long-term strategies for power system planning, which are crucial for maintaining the security of electricity supply. The analysis presents energy transition scenarios applied in Europe, clarifying their significance and timeline for implementation. This review provides an overview of existing studies on the technical, regulatory, and climatic aspects of renewable energy integration, highlighting key findings to support stakeholders in risk assessment and decision-making within the current decarbonization framework.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1157 Security analysis in communication networks for the Internet of things 2025-08-29T13:14:15+00:00 Krasen Angelov kkangelov@tugab.bg <p>The objective of this study is threefold: firstly, to analyze the challenges associated with managing the vast amount of data generated by Internet of Things (IoT) devices; secondly, to assess the nature and categorize security threats in IoT networks; and thirdly, to propose corresponding countermeasures to enhance security. As the number of connected devices increases, so do the associated security risks. This highlights the need for qualified stakeholders to mitigate these risks and prevent potential attacks. The proposed categorization provides valuable insights into the multifaceted roles and responsibilities of stakeholders in IoT ecosystems, facilitating a more nuanced understanding of their interrelationships. This categorization facilitates more effective decision-making by taking into account the specific context and responsibilities of each stakeholder group. This approach has been demonstrated to enhance the decision-making process in the domain of IoT security management. This would facilitate the development of effective strategies to address the evolving security challenges of IoT networks.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1158 Comparative analysis of wireless communication technologies with application in industrial networks for the Internet of things 2025-08-29T13:22:28+00:00 Krasen Angelov kkangelov@tugab.bg <p>The integration of the Internet of Things (IoT) into industrial communication networks is set to become the cornerstone of the communication infrastructure of future smart factories. These factories will comprise digitalized flexible production with a dynamic technological operational schedule and multiple mobile participants. The Internet of Things facilitates the collection of data at the point of use through the utilization of smart devices, which subsequently transmits the gathered information to the enterprise management system for the purpose of decision-making. The foundation for such production lies in the establishment of reliable and secure communication networks, encompassing wireless technologies. The primary contribution of the article is the proposed comparative analysis of the capabilities of modern advanced generations of wireless technologies for wireless data transmission in industrial networks of the Internet of Things, and their applicability for various scenarios. This paper focuses on three particular technologies: 5G (for cellular communication), WLAN (IEEE 802.11ax), and LoRaWAN.</p> 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications https://ojs.nbu.bg/index.php/YT/article/view/1159 Contents 2025-08-29T13:25:54+00:00 Editorial Board rpasarelski@nbu.bg 2024-12-30T00:00:00+00:00 Copyright (c) 2024 Yearbook Telecommunications