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Mathematical Models, Methods and Algorithms for Solving Difficult Optimization Problems for Achieving High Security in Communications and Better Economic Sustainability

Project № КП-06-Н 52/7 from 19.11.2021, Funding from National Science Fund of Bulgaria - Ministry of Education and Science, Project Coordinator Prof. Vassil Guliashki

Second stage results
(2024 - 2025)

Events

(Second stage 2024 - 2025)

Defense of doctoral student Emiliano Mancolli, held at IICT - BAS on March 21, 2024. The topic of the dissertation is: “Optimization Methods for Machine Learning Applications”, with scientific supervisor Prof. Dr. Vasil Gulyashki from IICT - BAS.

Emiliano Mankolli
Emiliano Mankolli
Emiliano Mankolli
Emiliano Mankolli

Defense of doctoral student Edyola Naka, held at IICT - BAS on January 24, 2025. The topic of the dissertation is: “Optimization Algorithms for Data Management”, with scientific supervisor Prof. Dr. Vasil Gulyashki from IICT - BAS.

Edjola Naka
Edjola Naka
Edjola Naka
Edjola Naka

Defense of doctoral student Krisel Tola, held at TU-Sofia on 12.03.2025. The topic of the dissertation is: “Development of Innovative Methods and Tools for E-Learning and E-Management in the Area of Computer-Aided Design”, with scientific supervisor Assoc. Prof. Dr. Galya Marinova from TU-Sofia.

Krisel Tola
Krisel Tola

Monographs

(Second stage 2024 - 2025)

1. Daniela Borissova, (2025) "Microgrids and Cybersecurit", Education and knowledge, 146 pages, ISBN 978-619-7515-57-2, eISBN 978-619-7515-61-9
Monograph


The monograph "Microgrids and Cybersecurity" presents contemporary research in the field of cyber protection of intelligent microgrids. Various forms of cyberattacks as well as architectures for large-scale data are examined. Different types of communications are analyzed, as well as the protocols and standards used in them. Different types of cyber vulnerabilities are described, as well as basic steps for performing risk analysis in a microgrid. Some global solutions for protection against cyberattacks based on machine learning are examined ...

2. Vassil Guliashki, Galia Marinova, Leoneed Kirilov et al., (2025) "Microgrids – optimization, management and operation", Education and knowledge, 150 pages, ISBN 978-619-7515-59-6, еISBN 978-619-7515-63-3


In the monograph "Microgrids - Optimization, Management and Operation" research is focused on the optimization, management and operation of microgrids, which are of key importance for the development of sustainable, flexible and smart energy systems. Microgrids combine various energy sources, energy storage and consumers in a localized system that can operate autonomously or in synchrony with the main grid. Scientific and engineering efforts in this area are aimed at increasing the efficiency, reliability and profitability of microgrids by applying modern methods for control, dispatching and economic optimization. Optimization, management and operation of microgrids will continue to play a key role in the transition to a decentralized, smart and low-carbon energy infrastructure ...

Monograph

Publications

(Second stage 2024 - 2025)

  1. Borissova, D.: Multicriteria decision-making in wind-solar power plants. Comptes rendus de l'Académie bulgare des Sciences. vol. 78(2), pp. 245–252, 2025. (IF: 0.3; SJR(Q3) = 0.154)
  2. Chikalanov, Al., Kirilov, L., Nikolov, R., Lyubenova, M., Petkov, Y.: A Prototype of Big Data Platform for Seniors Care. Comptes rendus de l’Académie bulgare des Sciences, vol. 77, no. 6, pp. 871- 880, 2024. (IF: 0.378; SJR(Q3) = 0.16)
  3. Chikalanov, Al., Kirilov, L., Kovatcheva, E., Nikolov, R., Shoikova, El., Iliev, Al., Gotsev, L.: A Model of Big Data Architecture on the Base of FIWARE Components. Comptes rendus de l’Académie bulgare des Sciences, vol. 76, no. 9, pp. 1393-1401, 2023. (IF: 0.3; SJR(Q3) = 0.16)
  4. Guliashki, V., Kirilov, L., Nuzi A.: Optimization Models and Strategy Approaches Dealing with Economic Crises, Natural Disasters, and Pandemics – an Overview. Cybernetics and Information Technologies, vol. 23, no. 4, pp. 3-25, 2023. (IF: 1.2; SJR(Q3) = 0.309)
  5. Guliashki, V., Kirilov, L., Marinova, G.: Methods and Algorithms for Flexible Job Shop Scheduling − A State of the Art. Cybernetics and Information Technologies, Vol. 25(2), pp. 3-30, 2025. (IF: 1.1; SJR(Q2) = 0.358)
  6. Borissova, D., Dimitrova, Z., Naidenov, N., Garvanova, M., Garvanov, I., Blagoev, I.: Digitalization challenges: A decision-making model for SCADA systems staff selection. WSEAS Transactions on Business and Economics, vol. 21, pp. 1869-1876, 2024. (SJR(Q4) = 0.18)
  7. Borissova, D., Naidenov, N., Yoshinov, R.: Digital transformation assessment model based on indicators for operational and organizational readiness and business value. In: Guarda, T., Portela, F., Diaz-Nafria, J.M. (eds) Advanced Research in Technologies, Information, Innovation and Sustainability. ARTIIS 2023. Communications in Computer and Information Science, Springer, Cham, vol. 1935, pp. 457–467, 2024. (SJR(Q4) = 0.2)
  8. Dimitrova, Z., Borissova, D., Dimitrov, V.: A methodology for alternatives ranking by estimations forming based on values from criteria decomposition into options. WSEAS Transactions on Business and Economics, vol. 21, pp. 2136-2144, 2024. (SJR(Q4) = 0.18)
  9. Barzev, I., Borissova, D., Buhtiyarov, N.: Comparison of different binary classification algorithms for malware detection. In: Rocha, Á., Ferrás, C., Hochstetter Diez, J., Diéguez Rebolledo, M. (eds) Information Technology and Systems. ICITS 2024. Lecture Notes in Networks and Systems, Springer, Cham, vol. 932, pp. 369–378, 2024. (SJR(Q4) = 0.17)
  10. Iliev, I., Rasheva-Yordanova, K., Borissova, D.: Challenges in geolocation for logistics delivery: A case study on the accuracy in Bulgaria of google maps directions API. In: Shishkov, B. (eds) Business Modeling and Software Design. BMSD 2024. Lecture Notes in Business Information Processing, Springer, Cham, vol. 523, pp. 283–292, 2024. (SJR(Q3) = 0.34)
  11. Barzev, I., Borissova, D.: An improved static analysis approach for malware detection by optimizing feature extraction combining different ML algorithms. In: Bennour, A., Bouridane, A., Almaadeed, S., Bouaziz, B., Edirisinghe, E. (eds) Intelligent Systems and Pattern Recognition. ISPR 2024. Communications in Computer and Information Science, Springer, Cham, vol. 2304, pp. 102–115, 2025. (SJR(Q4) = 0.182)
  12. Bankovska, M., Borissova, D., Rasheva-Yordanova, K.: A model for evaluating the effectiveness of e-learning courses based on indicators of course quality and time spent by the learners. In: Hao, T., et al. Learning Technologies and Systems. SETE 2024. Lecture Notes in Computer Science, Springer, Singapore, vol. 15589, pp. 32–43, 2025. (SJR(Q2) = 0.352 )
  13. Borissova, D., Bankovska, M., Rasheva-Yordanova, K., Dimitrova, Z.: Multicriteria Model for Evaluation of Learning Management Systems. WSEAS TRANSACTIONS on BUSINESS and ECONOMICS, vol. 22, 1237-1248, 2025. (SJR(Q4) = 0.192)
  14. Borissova, D., Dimitrova, Z., Naidenov, N., Garvanova, M., Garvanov, I., Yoshinov, R.: How to Select Chief Digital Officer to Drive Digital Transformation: A Multiple Attributes Group Decision-Making Model. In: Simian, D., Stoica, L.F. (eds) Modelling and Development of Intelligent Systems. MDIS 2024. Communications in Computer and Information Science, Springer, Cham, vol. 2486, pp. 3–17, 2025. (SJR(Q4) = 0.18)
  15. Barzev, I., Borissova, D.: Performance analysis of LSTM, SVM, CNN and CNN-LSTM algorithms for malware detection in IoT dataset. WSEAS TRANSACTIONS on COMPUTER RESEARCH, vol. 13, 288-296, 2025. (SJR(Q4) = 0.140)
  16. Borissova, D., Dimitrova, Z., Buhtiyarov, N., Garvanova, M., Garvanov, I., Tanev, Y.: Ready for digitization: Decision-making model for low code development platform selection. In: Guarda, T., Portela, F., Gatica, G. (eds) Advanced Research in Technologies, Information, Innovation and Sustainability. ARTIIS 2024. Communications in Computer and Information Science, Springer, Cham, vol. 2345, pp. 74–86, 2025. (SJR(Q4) = 0.18)
  17. Borissova, D., Dimitrova, Z., Popchev, I: Wind or solar photovoltaic energy: How to select renewable energy to invest?. In: E3S Web of Conferences, EEPES 2025, 638, 01002, 2025. (SJR = 0.205)
  18. Borissova, D., Dimitrova, Z., Buhtiyarov, N.: Web-based application to support decision-making in determining the progress of the green transition. In: Rocha, A., Ferrás, C., Calvo, H. (eds), Information Technology and Systems, ICITS 2025, Lecture Notes in Networks and Systems, Springer, Cham, vol. 1448, pp. 115–124, 2025. (SJR (Q4) = 0.166)
  19. Kondoff, Ch., Mikhov, R., Kirilov, L., Zaekova, R., Tashev Pl.: Working Regimes for Friction Stir Processing of Aluminium Alloy A6061. Proceedings of the 14th International Scientific and Practical Conference, Rezekne, Latvia, vol. 3, pp. 139-144, 2023. (SJR = 0.113)
  20. Kondoff, Ch., Tashev, Pl., Dykova, V., Kolev, M., Kirilov, L., Mikhov, R.: Tribological characteristics of composites based on A6061 and Zn prepared by friction stir processing. Journal of the Balkan Tribological Association - JBTA, vol. 30, no. 6, pp. 935-944, 2024. (SJR(Q4) = 0.151)
  21. Dimitrova, Z., Borissova, D., Dimitrov, V.: Web application based on serverless architecture to support group decision-making by scoring models. In: 5th International Conference on Communications, Information, Electronic and Energy Systems (CIEES), Veliko Tarnovo, Bulgaria, 2024. (Indexed in: IEEE Xplore)
  22. Shaglil, I., Stoyanova, K., Benotsmane, R.: Design and Implementation of DOA Algorithms for Smart Antenna Systems. In: Proceedings of the IEEE 25th International Carpathian Control Conference, 22-24 May, Krynica Zdrój, Poland, 2024. (Indexed in: IEEE Xplore)
  23. Guliashki, V., Music, G., Marinova, G.: An Efficient Algorithm for Scheduling Aircraft Landing Problem. In: Proceedings of the International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications CoBCom 2024, July 09th – 11th, Graz, Austria, paper CoBCom , pp. 1-6, 2024. (Indexed in: IEEE Xplore)
  24. Guliashki, V., Marinova, G.: Optimal Energy Management for Grid-Connected Microgrid Applications. In: Proceedings of the International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications CoBCom 2024, July 09th – 11th, Graz, Austria, paper CoBCom , pp. 1-5, 2024. (Indexed in: IEEE Xplore)
  25. Ibro, M, Marinova, G.: Designing an Augmented Reality Teaching Module for Power Consumption in FPGAs. In: Proceedings of the International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications CoBCom 2024, July 09th – 11th, Graz, Austria, paper CoBCom , pp. 1-4, 2024. (Indexed in: IEEE Xplore)
  26. Muka, E., Marinova, G.: Digital Twins to monitor IoT devices for green transformation of university campus. In: Proceedings of the International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications CoBCom 2024, July 09th – 11th, Graz, Austria, paper CoBCom , pp. 1-6, 2024. (Indexed in: IEEE Xplore)
  27. Guliashki V., Marinova, G.: AI-assisted Optimal Energy Management in Microgrids. In: Proceedings of the 32-th IEEE International Conference on Systems, Signals and Image Processing, IWSSIP 2025, June 24 - 26, Skopje, North Macedonia, 2025. (Indexed in: IEEE Xplore)
  28. Guliashki, V., Marinova, G.: Impact of Cyber Attacs on Human’s health. In: Proceedings of the IEEE International Workshop on Technologies for Defense and Security TechDefense 2024, November 11-13, 2024, Napoli, Italy, pp. 19-23, 2024. (Indexed in: IEEE Xplore)
  29. Berisha, D., Guliashki, V.: Optimization and Coordination Strategies, Reducing the Impact of the COVID-19 – Pandemic, a Survey. Problems of Engineering Cybernetics and Robotics, vol. 83, pp. 58-72, 2025. (Indexed in: Inspec, Google Scholar)
  30. Marinova, G.: Drones neutralisation, drone defense solutions. In: Proceedings of the IC-UBT 2024, 13th International Conference on Business, Technology and Innovation, Computer Science and Communication Engineering (CSCE), Prishtina, Kosovo, pp. 101-104, 2024. (Indexed in: EBSCO - Central & Eastern European Academic Source(CEEAS), ROAD Index)
  31. Stoyanova, K., Guliashki, V.: Group drop of sustainability: Trade-off solutions between low returns and portfolio stability. Computers and Informatics, 4(1); pp. 13-19, 2024. (Indexed in: EBSCO - Central & Eastern European Academic Source(CEEAS), ROAD Index)
  32. Stoyanova, K., Benotsmane, R., Grigorova, V.: Cryptocurrencies portfolio optimization with an EFA solution. Proceedings of ICT Innovations Conference, Ohrid, North Macedonia, pp. 2-13, 2024. (Indexed in: Google Scholar)
  33. Boshnjaku, E., Qehaja, B., Hajrizi, E., Guliashki, V., Marinova, G.: A Web-Based Hybrid Optimization Platform for Real-Time Microgrid Energy Management. In Proceedings of the ConTEL Symposium within the 33rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM 2025), September 18-20, 2025, Split, Croatia, pp. SYM5/III-1, 6 pages, 2025. (Indexed in: IEEE Xplore)
  34. Berisha, D., Guliashki, V.: Optimization Model for Communications Between Hospitals During a Pandemic. In Proceedings of the ConTEL Symposium within the 33rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM 2025), September 18-20, 2025, Split, Croatia, pp. SYM5/III-5, 6 pages, 2025. (Indexed in: IEEE Xplore)
  35. Malaj, E., Marinova, G.: Review on hardware logical encryption. In Proceedings of the IEEE International Workshop on Technologies for Defense and Security TechDefense 2025, November 5-7, 2025, Rome, Italy, pp. 497-502, 2025. (Indexed in: IEEE Xplore)
  36. Myasnichenko, V., Mikhov, R., Sdobnyakov, N., Kirilov, L., Bazulev, A.: Lattice Monte Carlo Simulation of Atomic Ordering in Gold-Silver Nanocages. WSEAS Transactions on Electronics, vol. 16, pp. 157-167, 2025. (Indexed in: IEEE Xplore)
  37. Marinova, G, Hajrizi, E., Guliashki, V.: Smart Energy Management in an University Campus Microgrid. In: Proceedings of the 7th International Balkan Conference on Communications and Networking (BalkanCom 2024), Ljubljana, Slovenia, June 3-6, pp. 76-81, 2024. (Indexed in: IEEE Xplore)
  38. Chikalanov, Al., Kirilov, L., Nikolov, R., Lyubenova, M., Petkov, Y: Implementation of FIWARE for Development of BigData Elderly Care Platform. Studies in Computational Intelloigence, Springer. (accepted)