Violeta Dimić

Challenges of Digitalization in the Green Economy - Book of Proceedings

AHP-BASED STATISTICAL EVALUATION OF DIGITALIZATION CHALLENGES IN THE GREEN ECONOMY

Dimić, V.; Milošević, M.R.; Milošević, D.M.

https://doi.org/10.46793/6461-101.241D

The adoption of digital technologies that improve productivity, sustainability and resource management is essential for the transition to a green economy. However, the digitisation process also brings with it complicated technological, economic, social and environmental issues that need to be prioritised methodically. To statistically evaluate and rank 25 indicators categorised according to five basic criteria – technological, economic, environmental, socio-institutional, and implementation risk indicators – this study employs the Analytic Hierarchy Process (AHP). The results show that technological indicators have the highest relative weight, highlighting the role that automation, artificial intelligence and digital infrastructure play in promoting green transitions. The environmental impacts underscore the necessity of energy-saving and emissions-free technologies, while the economic aspects are less important, since they are at the stage of showing the influence of investment costs and returns on digital growth. The outcomes authenticate the statistical reliability of the AHP matrix and offer a quantitative tool for decision-makers to outline the key areas in the digital-green transformation that require their attention. Overall, the study provides a structured approach to decision support for balancing technological innovation and sustainability goals.

Green economy; Analytic Hierarchy Process (AHP); technological innovation; digital infrastructure; statistical evaluation

M33

REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE

Information System Development of Electric Car Charging Stations by UML Diagrams

Dimić, V.; Milošević, P.; Đurić, Z.; Stokić, A.; Nikolić, V.

https://journal.iem.pub.ro/rrst-ee/en/article/view/1284

This paper presents a high-level approach to developing an information system for electric car charging stations, utilizing a Process Layer Supply pattern. This pattern organizes activity processes, business rules, visions, and goals that support system modelling. The paper models the system's structural and behavioral aspects using UML diagrams—specifically, class, use case, and activity diagrams — via the Papyrus UML2 tool. These diagrams facilitate visualizing functional requirements, user-to-system interactions, and system components for efficient planning, development, and implementation. The model addresses the most critical gaps in an electric car charging infrastructure and optimizes the information system's operations for practical implementation. The proposed system is designed to support future developments, like integration with dynamic demand markets for flexible pricing and optimized operations. Additionally, we use pseudocode to link abstract UML models to actual implementations, ensuring the accurate transfer of system logic to the corresponding code. Since every component of the charging network is logically interconnected, a sustainable foundation for future electric car mobility is established.

Information system; Electric car charging stations; Process layer supply; Unified modelling language (UML)

M23

Sustainability

Enhancing Efficiency in Sustainable IoT Enterprises: Modeling Indicators Using Pythagorean Fuzzy and Interval Grey Approaches.

Milošević, M. R.; Nikolić, M. M.; Milošević, D. M.; Dimić, V.

https://www.mdpi.com/2071-1050/17/15/7143

„The Internet of Things” is a relatively new idea that refers to objects that can connect to the Internet and exchange data. The Internet of Things (IoT) enables novel interactions between objects and people by interconnecting billions of devices. While there are many IoT-related products, challenges pertaining to their effective implementation, particularly the lack of knowledge and confidence about security, must be addressed. To provide IoT-based enterprises with a platform for efficiency and sustainability, this study aims to identify the critical elements that influence the growth of a successful company integrated with an IoT system. This study proposes a decision support tool that evaluates the influential features of IoT using the Pythagorean Fuzzy and Interval Grey approaches within the Analytical Hierarchy Process (AHP). This study demonstrates that security, value, and connectivity are more critical than telepresence and intelligence indicators. When both strategies are used, market demand and information privacy become significant indicators. Applying the Pythagorean Fuzzy approach enables the identification of sensor networks, authorization, market demand, and data management in terms of importance. The application of the Interval Grey approach underscores the importance of data management, particularly in sensor networks. The indicators that were finally ranked are compared to obtain a good coefficient of agreement. These findings offer practical insights for promoting sustainability in enterprise operations by optimizing IoT infrastructure and decision-making processes.

Internet of Things; enterprises; sustainable development; multi-criteria decision-making; Pythagorean Fuzzy Analytical Hierarchy Process; Interval Grey Analytical Hierarchy Process

M22

MINDS 2025 - The Balkans (the Western Balkans) and Europe (the European Union): Facing the Challenges of the World in the Transition Process – Book of Proceedings

LABORATORY 4.0 AS A CONSEQUENCE OF INDUSTRY 4.0 WITH REFERENCE TO FIRE PROTECTION

Jevtić, R.; Ranđelović, M.; Dimić, V.

https://www.fdn.edu.rs/node/492

Work environment and ambient present an object susceptible to great and constant changes. These changes lead to a move away from analog processes and towards digitization. Many systems had to realize these changes, including laboratory systems. Laboratory systems present complex systems that can function independently or within other complex systems (for example, manufacturing systems, factory systems, research systems, etc.). It is obvious that laboratory systems must optimize and modernize all of their activities and functions. Many laboratory processes and procedures must be changed into automated processes and integrated into appropriate systems for information management. New laboratory systems are networked and connected in real time, with huge technical and professional possibilities. A very important scientific sphere that needs strong laboratory support and cooperation is fire safety. It is well known that almost every product intended for fire protection demands detailed laboratory testing related to valid standards or simulation of some potential fire or evacuation scenario and similar. In this paper, term Laboratory 4.0 will be presented as a consequence of Industry 4.0 related to fire protection example. Although the laboratories represent systems without which any smart and modern production process cannot be imagined, they also represent an inevitable and logic consequence of Industry 4.0.

laboratory; Industry 4.0; simulation; fire protection

M33

MINDS 2025 - The Balkans (the Western Balkans) and Europe (the European Union): Facing the Challenges of the World in the Transition Process – Book of Proceedings

INTEGRATION OF WEBSOCKET AND REST API TECHNOLOGIES IN THE DEVELOPMENT OF A PLATFORM FOR DIGITAL DIALOGUE IN TEACHING

Ranđelović, M.; Jevtić, R.; Dimić, V.

https://www.fdn.edu.rs/node/492

This paper presents the technical realization and evaluation of an interactive web platform for digital dialogue in teaching, based on the integration of WebSocket and REST API technologies. Digital dialogue is a concept in which a professor, during a lecture in real-time, asks students questions through a specialized web application, and students respond via their mobile devices, thus transforming the teaching process into dynamic, asymmetrical two-way communication. By introducing such a model, the platform enables the essence of the Socratic dialogue to be realized in a modern digital environment. The paper describes the architecture of the system, the technologies used, as well as the experimental environment in which the application was tested. Using SQL analysis and objective technical metrics (latency, response speed, transmission success), the results of system performance in real teaching conditions are presented.

digital dialogue; digital transformation; education 4.0; interaction in teaching

M33

REVIZOR, Časopis za upravljanje organizacijama, finansije i reviziju

Panel Discussion: Benefits and Challenges of Implementing Modern Technologies from a Sustainability Perspective in Economic Practice

Đurić, Z. & Dimić, V.

https://casopisrevizor.rs/index.php/revizor/article/view/210

Pod pokroviteljstvom Međunarodne naučne konferencije „Alfatech“ Fakulteta za informacione tehnologije ALFA BK Univerziteta i Instituta za strategijske studije i razvoj „PetarKarić“ ALFA BK Univerziteta, 28. Februara 2025. godine, održana je panel diskusija, pod nazivom „Koristi i izazovi primene savremenih tehnologija sa aspekta održivosti u privrednoj praksi”. Dobro poznata, aktuelna međusobno prožimajuća pitanja održivosti, kao što su rast emisije ugljendioksida, globalno zagrevanje i prekomerna zagađenost prirodnog okruženja ovog puta razmatrana su sa stanovišta uloge ubrzanog razvoja informacione tehnologije i veštačke inteligencije i njihove primene u privredi. Razmatranje je obuhvatilo i pitanje da li, i ako da, u kojoj meri nova tehnologija doprinosi stvaranju nove vrste otpada. Primeri toga su milijarde zastarelih mobilnih telefona i drugog elektronskog otpada.

—

M35

ALFATECH 2025 - Smart Cities and modern technologies - Book of Proceedings

Electric cars and their integration into modern power networks

Jovanić, M. & Dimić, V.

https://doi.org/10.46793/ALFATECHproc25.073J

Electric vehicles are becoming more widespread in modern times; however, with this green technology comes a new challenge of supporting charging requirements and integrating said requirements into our current power networks. In this paper, we will explore the modern technologies and concepts that are being considered for the enhancement of various power networks around the world, as well as the challenges of integrating a growing number of electric vehicles into the networks. We will also review the immense rise of electric vehicle sales in modern times to showcase why a seamless integration into the power networks is required and how big the industry has become. We will also highlight various guidelines being put in place by the three main markets to ease this complex process.

Electric cars; Power networks; Challenges; Integration

M33

Electronics

Optimization of Artificial Intelligence Algorithm Selection: PIPRECIA-S Model and Multi-Criteria Analysis.

Popović, S.; Viduka, D.; Bašić, A.; Dimić, V.; Djukic, D.; Nikolić, V.; Stokić, A.

https://www.mdpi.com/2079-9292/14/3/562

In the age of digitization and the ever-present use of artificial intelligence (AI), it is essential to develop methodologies that enable the systematic evaluation and ranking of different AI algorithms. This paper investigated the application of the PIPRECIA-S model as a methodological framework for the multi-criteria ranking of AI algorithms. Analyzing relevant criteria such as efficiency, flexibility, ease of implementation, stability and scalability, the paper provided a comprehensive overview of existing algorithms and identified their strengths and weaknesses. The research results showed that the PIPRECIA-S model enabled a structured and objective assessment, which facilitated decision-making in selecting the most suitable algorithms for specific applications. This approach not only advances the understanding of AI algorithms but also contributes to the development of strategies for their implementation in various industries.

PIPRECIA-S model; artificial intelligence; multi-criteria analysis; algorithm ranking; strategic planning

M22

Računarske mreže i IP tehnologije - univerzitetski udžbenik

Računarske mreže i IP tehnologije

Dimić, V. & Gligorijević, M.

COBISS.SR-ID 167196681

Poznavanje računarskih mreža postalo je ključna veština u savremenom svetu. Cilj prvog poglavlja je da pruži osnovno razumevanje računarskih mreža, njihovih ključnih pojmova, istorijskog razvoja, arhitekture i praktične primene. Kroz ovo poglavlje, čitalac će steći znanja o tome kako mreže funkcionišu, koji su osnovni elementi njihove strukture i kako se razvijala tehnologija koja omogućava modernu digitalnu komunikaciju. Cilj ovog poglavlja je da omogući razumevanje mrežnih modela, OSI i TCP/IP modele, koji su osnova za dizajn i implementaciju računarskih mreža. Studenti će se upoznati sa osnovnim principima slojevite arhitekture mrežnog softvera, naučiće kako svaki sloj obavlja specifične funkcije i kako se ovi slojevi međusobno povezuju. Takođe, studenti će naučiti kako se ovi modeli koriste u praksi, kako bi se omogućila interoperabilnost među različitim mrežnim uređajima i tehnologijama. Kritički osvrt na prednosti i mane oba modela pomoći će studentima da shvate njihove primene u stvarnim mrežama, kao i da prepoznaju izazove u implementaciji i razvoju mrežnih sistema. Na kraju, poglavlje će obraditi proces enkapsulacije podataka i vrste usluga koje mrežni slojevi pružaju, što je ključno za efikasnu i sigurnu razmenu podataka u mrežama.

Rečnik manje poznatih i stručnih pojmova

M42

PaKSoM 2024 - Path to a Knowledge Society-Managing Risks and Innovation - Book of Proceedings

The Significance of Simulation in Mining as a Conseque of Industry 4.0.

Jevtić, R. B.; Randjelović, M. B.; Dimić, V.; Janković, I. D.

https://zenodo.org/records/14708016

Industry 4.0 has become global strategic stimulation for realization of science-technological development. Although Industry 4.0 presents complex concept, it could be defined as completely new approach and appliance of information-communication systems with integration at different levels with purpose of increasing of product`s quality and service quality. Industry 4.0 permeates all pores and spheres of modern society. One of those spheres is mining. Mines, surface mines, hard mechanization and other present specific manufacturing systems with lot of products and production waste. Appliances of Industry 4.0 for those systems must be well planned, organized and realized, including all specifications related to mining. Complete planning of exploitation, application of maintenance related to condition, analyses and prediction of benefits and problems are only some of them. The appliance of the new technologies in mining and design of Mining 4.0 concept and standard demands many preparations and purports many benefits, but also and many problems. This paper was written to show the influence of Industry 4.0 and new technologies, especially simulation as a very important benefit in the sense of safety, costs and realisation.

Industry 4.0; mining 4.0; concept; management; simulation; evacuation

M33

COAST 2024 - Advances in science and technology - Book of Proceedings

Modeling mobility performance within smart city infrastructure using urn diagrams

Dimić, V. & Milošević, P.

https://confcoast.com/img-publications/

The implementation of "smart city" projects can undoubtedly benefit from a reliable information system to monitor autonomous electric car charging stations. Developing such a system is indeed a complex process that requires careful planning and consideration of various operating scenarios. It's crucial to ensure that all aspects of the system are well-designed and implemented to meet the needs of the users and the community. In this paper, one such scenario through the User Requirements Notation (URN) as a modeling language used to model and analyze requirements is developed. The centrepiece of this system is jUCM-Nav, an open modelling, analysis, and transformation tool for URN that operates on the Eclipse platform. Stored information on autonomous electric car charging stations includes the maximum energy capacity, current energy state, unit energy price, distribution cost, and identifier. The car database stores the owner's name and surname, the current energy state and capacity, and the account balance. The information system should simulate charging and record the receipts generated after charging.

charging stations; Eclipse platform

M33

ITRO 2024 - INFORMATION TECHNOLOGY AND DEVELOPMENT OF EDUCATION - Book of Proceedings

SCHOOL WITHOUT MOBILE PHONES - IMPACT ON SOCIALIZATION

Đukić Popović, S.; Dimić, V.; Popović, S.; Todić, M.; Popović, I.

http://www.tfzr.rs/itro

Although mobile phones are part of today's society, without which one cannot imagine a day, the initiative of schools without mobile phones is joined by an increasing number of educational institutions in the Republic of Serbia. With the introduction of this initiative, as well as with the adoption of new regulations, mobile phones are being kept away from the youngest, at least in school classrooms. The effects are already measurable. The paper you are reading is the result of research that is still being carried out in several schools in Serbia, and it presents the results obtained by analyzing the questionnaires that were filled out by all actors of the teaching process. The positive aspects that are reflected in the better socialization of students, socializing and the development of emotions and empathy are emphasized, but also some negative ones that primarily lead to inevitable changes in the teaching process.

mobile phones; socialization; education; innovation

M33

ALFATECH 2024 - Smart Cities and modern technologies - Book of Proceedings

Application of Fuzzy AHP Approach for Designing Model of Smart City Development

Milošević, M.; Milošević, D.; Dimić, V.

https://doi.org/10.5281/zenodo.12593658

Each city represents a unique system where different actors, citizens, administration, and utility companies undertake numerous activities, creating complex interactions and interdependencies. Previous initiatives aimed at creating a platform for a smart sustainable city have proven that there is no one-size-fitsall approach to making a city "smarter" and sustainable. It is critical to develop a methodology that will assist in determining the best route to the end objective, a sustainable and smart city, by thoroughly grasping the unique ecological and social city surroundings, priority activities, history, and distinctive traits. Our research attempts to formulate a plan for the smart city scheme in Serbia. Additionally, we aim to model and optimize the proposed concept based on a systematic evaluation of the various dimensions and corresponding indicators that govern the smart city framework. The paper relies on a ranking system for these dimensions and indicators. The applied methodology is a mathematical method that uses a phased approach to the analytical hierarchical process, FAHP, which hierarchically classifies the whole system through various criteria and sub-criteria with expert opinions.

smart city; Serbia; sustainability; fuzzy AHP; development; MCDM

M31

ALFATECH 2024 - Smart Cities and modern technologies - Book of Proceedings

Safety in schools: the simulation of evacuation at the elementary school car konstantin in NIŠ

Jevtić, R.; Dimić, V.; Ničković, J.; Antić, I.

https://doi.org/10.5281/zenodo.12614658

Evacuation generally presents a very complex and responsible task, no matter what kind of object or location is in a plan for the evacuation. Reasons for evacuation are mostly well known. These are earthquakes, fire, overflow, tsunamis, terrorist attacks, and others. A major significant factor for evacuation is a lot of humans, particularly immobile, hard-mobile persons and children. This fact can significantly make evacuation difficult, complicated and even hard possible or impossible. The simulation software application presents many benefits because of prediction, calculation of evacuation times and determining evacuation routes. In this paper, the evacuation time of each evacuation exit was calculated by the simulation software Pathfinder (version 2023). The results of this paper were done by an appropriate simulation model at the elementary school Car Konstantin from Niš with all potential exit doors. Simulations predicted two scenarios with occupants’ speeds: 1m/s, 1.5 m/s, 2m/s, 2.5 m/s, 3m/s and 3.5 m/s. The contribution of these results is applicable because the calculation of evacuation times for every combination of potential exits facilitates potential evacuation situations. Evacuation problems can be much better and effectively analyzed with the software. Particular benefits from the simulation software used are in the sense of safety, cheapness and prediction.

evacuation time; evacuation route; pupils and staff; simulation software; safety

M33