Publications of the laboratory team:

  1. Hristov, H., Bliznakov, M., Somova, E., & Valkanov, V. (2024). Design and implementation of the system for dynamic generation of accessible web content. AIP Conference Proceedings, 3063(1), 30011. https://doi.org/10.1063/5.0196421

  2. Georgiev, A., & Valkanov, V. (2024). Custom data quality mechanism in data warehouse facilitated by data integrity checks. Mathematics and Education in Mathematics, 53, 67-75. https://doi.org/10.55630/mem.2024.53.067-075

  3. Georgiev, A., & Valkanov, V. (2023). Implementation of Blockchain technology in electronic voting systems. 2023 31st National Conference with International Participation, TELECOM 2023. https://doi.org/10.1109/TELECOM59629.2023.10409673

  4. Petrov, M., & Valkanov, V. (2023). System Tempura – A modern approach for describing and managing temporal processes in a virtual educational space. International Conference Automatics and Informatics, ICAI 2023 – Proceedings, 490-495. https://doi.org/10.1109/ICAI58806.2023.10339086

  5. Petrov, M., & Valkanov, V. (2023). Analysis of source code based on changes in its state over time – Using user behavior models. International Conference Automatics and Informatics, ICAI 2023 – Proceedings, 367-372. https://doi.org/10.1109/ICAI58806.2023.10339100

  6. Hristov, H., Cheresharov, S., Valkanov, V., & Ignatov, A. (2022). IPTV monitoring via GPM3 for A1 and Vivacom. 2022 IEEE 11th International Conference on Intelligent Systems, IS 2022. https://doi.org/10.1109/IS57118.2022.10019660

  7. Stoyanova-Doycheva, A., Doychev, E., Ivanova, V., Valkanov, V., & Tabakova-Komsalova, V. (2022). Event ontology about wheat cultivation. IFAC-PapersOnLine, 55(32), 206-210. https://doi.org/10.1016/j.ifacol.2022.11.140

  8. Petrov, M., & Valkanov, V. (2021). Time-based error classification in virtual education space. International Journal of Differential Equations and Applications, 20(2), 273-286. https://doi.org/10.12732/ijdea.v20i2.13

  9. Petrov, M., & Valkanov, V. (2020). Progressive challenge selection in the context of virtual education space. 2020 International Conference Automatics and Informatics, ICAI 2020 – Proceedings. https://doi.org/10.1109/ICAI50593.2020.9311304

  10. Valkanov, V., Petrov, M., Rusev, D., & Radeva, I. (2020). Modelling distributed fault-tolerant high availability storage cluster based on block-chain concepts for tracking scientific-research progress. 2020 IEEE 10th International Conference on Intelligent Systems, IS 2020 – Proceedings, 590-595. https://doi.org/10.1109/IS48319.2020.9199980

  11. Todorov, J., Valkanov, V., Stoyanov, S., Daskalov, B., Popchev, I., & Orozova, D. (2018). Personal assistants in a virtual education space. Studies in Systems, Decision and Control, 140, 131-153. https://doi.org/10.1007/978-3-319-78437-3_6

  12. Kehayova, I., Malinov, P., Valkanov, V., & Doychev, E. (2016). Architecture of a module for analyzing electronic test results. 2016 IEEE 8th International Conference on Intelligent Systems, IS 2016 – Proceedings, 784-788. https://doi.org/10.1109/IS.2016.7737402

  13. Todorov, J., Stoyanov, S., Valkanov, V., Daskalov, B., & Popchev, I. (2016). Learning intelligent system for student assistance – LISSA. 2016 IEEE 8th International Conference on Intelligent Systems, IS 2016 – Proceedings, 753-757. https://doi.org/10.1109/IS.2016.7737397

  14. Gramatova, K., Doychev, E., Stoyanov, S., & Valkanov, V. (2015). Integration of eTesting in an IoT eLearning ecosystem-Virtual eLearning space. ACM International Conference Proceeding Series. https://doi.org/10.1145/2801081.2801086

  15. Valkanov, V., Stoyanov, S., & Valkanova, V. (2015). Building a virtual education space. WMSCI 2015 – 19th World Multi-Conference on Systemics, Cybernetics and Informatics, Proceedings, 322-326.

  16. Valkanov, V., Stoyanova-Doycheva, A., Doychev, E., Stoyanov, S., Popchev, I., & Radeva, I. (2015). Ajtempura – First software prototype of C3A model. Advances in Intelligent Systems and Computing, 322, 427-435. https://doi.org/10.1007/978-3-319-11313-5_38

  17. Stoyanov, S., Valkanov, V., Popchev, I., Stoyanova-Doycheva, A., & Doychev, E. (2014). A model of context-aware agent architecture. Comptes Rendus de L’Academie Bulgare des Sciences, 67(4), 487-496.

  18. Ginchev, D., & Stavrev, S. (2024). Simulation of an optical instrument in M1 Abrams main battle tank using Unreal Engine. In 2024 13th International Conference on Modern Circuits and Systems Technologies (MOCAST) (pp. 1-4). Sofia, Bulgaria. https://doi.org/10.1109/MOCAST61810.2024.10615379
  19. Stavrev, S., & Ginchev, D. (2024). Detection and analysis of commercial drivers’ focus and attention using sensors and simulators. AIP Conference Proceedings, 3064(1), 050003, ISSN:0094-243XE-ISSN:1551-7616 (Scopus, SJR=0.164)
  20.  Stavrev, S., Ginchev, D., “Reinforcement Learning Techniques in Optimizing Energy Systems“, Electronics (Switzerland), Volume 13, Issue 8, April 2024, Article number 1459, ISSN 2079-9292, DOI 10.3390/electronics13081459 (Scopus SJR=0.628, WoS IF=2.9 Q2)
  21. Gyulyustan, H., Hristov, H., Stavrev, S., Enkov, S., “Measuring and Analysis of Speech-to-text Accuracy of Some Automatic Speech Recognition Services in Dynamic Environment Conditions”, AIP Conference Proceedings, 2024, 3063(1), 030001, ISSN:0094-243XE-ISSN:1551-7616 (Scopus, SJR=0.164)
  22. Stavrev, S., & Velcheva, I. (2023). Using Sensors to Detect and Analyze Students’ Attention during Road Safety Training in Primary School. Journal of Mathematics and Informatics, vol. 66(3),pp. 298-308. Az-buki National Publishing House for Education and Science. DOI: https://doi.org/10.53656/math2023-3-7-usi. ISSN 1314–8532., (WoS) 
  23. Constantin, A.-I., Iosif, G., Chihaia, R.-A., Marin, D., Abu Shehadeh, G. U., Karahan, M., Gerikoglu, B., & Stavrev, S. (2023), “Importance of Preventive Maintenance in Solar Energy Systems, Fault Detection for Solar Panels based on Thermal Images”, in Electrotehnica, Electronica, Automatica (EEA), vol. 71(1), pp. 01-12, ISSN 1582-5175, DOI: https://doi.org/10.46904/eea.23.71.1.1108001 (SCOPUS, SJR: 0.14, Q4) 
  24. Stavrev, S., Ushanova, G. (2023). “A modern instrument for game-based learning of English words”, Е-journal „Pedagogical Forum“, vol. 2023 (1), pp. 3-8, ISSN: 1314-7986, DOI: 10.15547/PF.2023.001, Link: https://drive.google.com/file/d/1rxRzTyVRRBOZrWaaV-BIhCU79pnYKzI8/view 
  25. Gyulyustan, H., Hristov, H., Stavrev, S., & Enkov, S. (2023). Measuring and analysis of speech-to-text accuracy of some automatic speech recognition services in dynamic environment conditions, Journal of Physics: Conference Series, 2339(012009), International Conference on Electronics, Engineering Physics and Earth Science 2023 (EEPES 2023), Kavala, Greece, ISSN: 1742-6596, (SCOPUS, SJR: 0.21)
  26. Stavrev, S., & Ginchev, D. (2023). Prototype Monitoring System Detecting Mental Workload During Pilot Simulation Training. In 2023 International Conference on Military Technologies (ICMT), pp. 1-6. Brno, Czech Republic. DOI: 10.1109/ICMT58149.2023.10171264.  
  27. Stavrev, S., Ginchev, D. (2022). “Implementation of a system for monitoring bio-physiological data of pilots via a flight simulator”, International Scientific Conference Proceedings “Informatics, Mathematics, Education and Their Applications” (IMEA 2022), pp. 205-212, ISBN  978-619-7663-33-4, Link: https://imea2022.fmi-plovdiv.org/wp-content/uploads/2023/01/3_9_Stavrev_Ginchev_205_212.pdf 
  28.  Stavrev,S., Ginchev, D. (2022). “Detection and Analysis of Commercial Drivers’ Focus and Attention Using Sensors and Simulators”, Butrans 2022 Conference Proceedings, Sozopol, Bulgaria, 2022
  29. Hristov H., Stavrev, S. (2022). “Generations of human-computer interactions: evolution, tendencies and perspectives”, Journal of Physics: Conference Series, 2339(012009), International Conference on Electronics, Engineering Physics and Earth Science 2022 (EEPES 2022), Varna, Bulgaria, ISSN: 1742-6596, (SCOPUS, SJR: 0.21), http://dx.doi.org/10.1088/1742-6596/2339/1/012009   
  30. Stavrev, S., (2021). “Using an interactive floor system for game-based learning of human emotions”, AIP Conference Proceedings, 2505, 040006 (2022), (SCOPUS, SJR: 0.19), https://doi.org/10.1063/5.0100702   
  31. Stavrev, S., (2021). “Virtual exhibitions during a pandemic – a real-time online expo with a fictional interior”, Anniversary International Scientific Conference RESEARCH AND EDUCATION IN MATHEMATICS, INFORMATICS AND THEIR APPLICATIONS , REMIA’2021, Plovdiv, pp. 113-120, Bulgaria, Paisii Hilendarski University Press, ISBN: 978-619-202-711-7
  32. Stavrev,S., Ginchev, D. (2021). “Towards a common platform simulator for European armored combat vehicles using a modular software architecture,” 2021 International Conference on Military Technologies (ICMT), 2021, IEEE Xplore, pp. 1-5, doi: https://doi.org/10.1109/ICMT52455.2021.9502787
  33. Stavrev,S., Ginchev, D. (2020). “A low-cost battle tank simulator using Unreal Engine 4 and open-hardware microcontrollers,” IEEE XXIX International Scientific Conference Electronics (ET), Sozopol, Bulgaria, 2020, IEEE Xplore, pp. 1-4, ISBN:978-1-7281-7426-6, doi: https://doi.org/10.1109/ET50336.2020.9238266 
  34. Stavrev,S., Ginchev, D. (2020). Towards a Cost-Efficient Gunner Controller for a Modular Battle Tank Simulator, IEEE International Conference Automatics and Informatics’2020 (ICAI’20), Varna, Bulgaria, 2020, IEEE Xplore, ISBN:978-1-7281-9308-3, doi: https://doi.org/10.1109/ICAI50593.2020.9311298     
  35. Stavrev, S. (2020). FLUURMAT – TRAINING PLATFORM FOR INTERACTIVE PROJECTION. Automation and Informatics Journal, 2019 (1), pp. 38-43, ISSN 0861-7562, https://www.researchgate.net/publication/341788626_FLUURMAT_-_obucitelna_platforma_za_interaktivna_proekcia
  36. Gyulyustan, H., Hristov, H., Stavrev, S., Enkov, S., “Measuring and Analysis of Speech-to-text Accuracy of Some Automatic Speech Recognition Services in Dynamic Environment Conditions”, AIP Conference Proceedings, 2024, 3063(1), 030001, ISSN:0094-243XE-ISSN:1551-7616 (Scopus, SJR=0.164)
  37. H. Hristov, А. Ignatov, „Automated Management of Network Infrastructure“- „Автоматизираноуправление на мрежова инфраструктура“ (in Bulgarian), Mathematics and informatics, vol. 62, no. 6, pp. 602-615, 2019. ISSN 1314 – 8532 (Online), ISSN 1310 – 2230 (Print). Available: https://mathinfo.azbuki.bg/matematics/matharticles2016-4/godishno-sadarzha
    nie-na-sp-matematika-i-informatika-2019-g/     (Web of Science).
  38. H. Hristov, S. Cheresharov, S. Chonkov and K. Tsvetanov, “Information Security in the Design of Web-Based Software Systems,” 2020 International Conference Automatics and Informatics (ICAI), Varna, Bulgaria, 2020, pp. 1-6, doi: 10.1109/icai50593.2020.9311305, Electronic ISBN: 978-1-7281-9308-3, Print on Demand (PoD) ISBN: 978-1-7281-9309-0. Presented: 2020 International Conference Automatics and Informatics, 1-3 October 2020, Varna, Bulgaria, 2020, Available: https://ieeexplore.ieee.org/document/9311305, (IEEE Xplore, Scopus)
  39. H. Hristov, N. Chochev, Qualitative Research of Conference Online Learning for Web Design Students – Качествено изследване на конферентно онлайн обучение при студенти по уеб дизайн(in Bulgarian), Mathematics and informatics, vol. 64, no. 2, pp. 207-221, 2021, ISSN 1314 – 8532 (Online), ISSN 1310 – 2230 (Print). https://doi.org/10.53656/math2021-2-7-kac (Web of Science)
  40. E. Hadzhikolev, S. Hadzhikoleva, H. Hristov, E. Yonchev & V. Tsvetkov, Modeling of Pedagogical Patterns in an E-learning System. International Journal of Emerging Technologies in Learning (iJET), vol. 16, no. 24, pp. 205–219, 2021, https://doi.org/10.3991/ijet.v16i24.26775, eISSN: 1863-0383, (Web of Science, Scopus data as of December 2021 Q1, SJR 0.61) Available: https://online-journals.org/index.php/i-jet/article/view/26775/10531 
  41. H. Hristov, R. Cherneva, “Recognition of problematic educational situations in computer modeling training”, Mathematics and informatics, vol. 65, no. 3, pp. 247-258, 2022, ISSN 1314 – 8532 (Online), ISSN 1310 – 2230 (Print), Available: https://azbuki.bg/wp-content/uploads/
    2022/06/Matematika_03_Hristo-Hristov.pdf      , (Web of Science)
  42. H. Hristov, E. Yonchev, V. Tsvetkov, “Modelling of pedagogical patterns through e-Learning objects”, Information Technologies and Learning Tools, 2022, Vol 89, No3, ISSN: 2076-8184. DOI: 10.33407/itlt.v89i3.4859. Available: https://journal.iitta.gov.ua/index.php/itlt/article/
    view/4859     (Web of Science)
  43. H. Hristov & S. Stavrev, Generations of human-computer interactions: evolution, tendencies and perspectives, Journal of Physics: Conference Series, Volume 2339, (2022), 012009, Online ISSN: 1742-6596, Print ISSN: 1742-6588, doi:10.1088/1742-6596/2339/1/012009. Presented: International Conference on Electronics, Engineering Physics and Earth Science 2022 (EEPES 2022) 21/06/2022 – 24/06/2022 Varna, Bulgaria. Available: https://iopscience.iop.org/article/10.1088/1742-6596/2339/1/012009/pdf, (Scopus data as of September 2022 Q4, SJR 0,21)
  44. H. Hristov, S. Enkov, M. Bliznakov, A. Uzunov, Method for Designing Accessible Web Content in The Web Space of “Paisii Hilenarski” Plovdiv University. International Journal of Emerging Technologies in Learning (iJET), vol. 17, no. 21, pp. 184-196, 2022. eISSN: 1863-0383, DOI: https://doi.org/10.3991/ijet.v17i21.34307, Available: https://online-journals.org/index.php
    /i-jet/article/view/34307     , (Web of Science, Scopus data as of March 2022 Q1, SJR 0.61)
  45. S. Cheresharov, H. Hristov, V. Tabakova-Komsalova, V. Naneva, Hierarchical Learning Management System for the Insurance Industry, International Journal of Emerging Technologies in Learning (iJET), vol. 17 no. 21. pp. 123-134, 2022. eISSN: 1863-0383, DOI: https://doi.org/
    10.3991/ijet.v17i21.33595    , Available: https://online-journals.org/index.php/i-jet/article/view/
    33595     , (Web of Science, Scopus® data as of March 2021 Q1, SJR 0.61)
  46. H. Hristov, T. Glushkova, S. Cheresharov and M. Stoeva, A Model for Designing Accessible Color and Contrast for Users with Visual Deficiency and Color Blindness, 2022 IEEE 11th International Conference on Intelligent Systems (IS), Warsaw, Poland, 2022, pp. 1-7, doi: 10.1109/IS57118.2022.10019637., Electronic ISBN:978-1-6654-5656-2, Print on Demand(PoD) ISBN:978-1-6654-9276-8;  Electronic ISSN: 2767-9802, Print on Demand(PoD) ISSN: 2832-4145. Presented: 2022 IEEE 11th International Conference on Intelligent Systems (IS), Warsaw, Poland, 12-14 October 2022 Available: https://ieeexplore.ieee.org/document/10019637  (IEEE Xplore, Scopus)
  47. Hr. Hristov, G. Stoitsov, M. Bliznakov, S. Minchev. (2023). An Approach to Validating the Accessibility of Dynamic Web Pages. TEM Journal, 12(1), 233-240., ISSN:  2217-8309 (Print). eISSN: 2217-8333 (Online). Available: https://www.temjournal.com/content/121/
    TEMJournalFebruary2023_233_240.pdf     (Web of Science, Scopus data as of March 2023:  Q3, SJR 0.25)
  48. Lefterov, D., Hristov, Hr., Enkov, S., A model-based approach to enhancing web accessibility for individuals with special education needs. International Journal on Information Technologies and Security, vol. 15, no 2, pp. 15-26, 2023, DOI: https://doi.org/10.59035/RXVF3370, ISSN 1313-8251. Available: https://ijits-bg.com/sites/default/files/archive/2023%28vol.15%29/No2/
    contents/2023-N2-02.pdf     , (Web of Science)
  49. Iv. Velcheva, Hr. Hristov, Teaching of Web Design and Programming as a Role-Playing Team Building Game. International Journal of Information and Education Technology, vol. 13, no. 5, pp 825-830, May 2023. ISSN: 2010-3689 (Online). DOI: 10.18178/ijiet.2023.13.5.1874 Available:  http://www.ijiet.org/vol13/IJIET-V13N5-1874.pdf (Scopus® data as of June 2023:  Q3, SJR 0,24)
  50. Hristov, Hr., Application for registration of a utility model, “Model of a system for control and management of a piezoelectric crystal generator”, Entry number to the patent office: BG/U/2023/5737, Date of application: 04.05.2023.
  51. Hristov, Hr., Chobanov, Em. Application for Registration of a Utility Model, “Device Model for Generating Electrical Energy Using a Piezoelectric Crystal”, Incoming Number to the Patent Office: BG/U/2023/5682, Date of Filing: 02.03.2023
  52. A. Kostadinov, Hr. Hristov, A Model of Communication System with Vending Machines, In: Research Highlights in Science and Technology vol 2, (ed. M. Irenee), 2023, p.86–94., B P international, UK, London, ISBN: 978-81-19217-59-5 (Print), e-ISBN: 978-81-19217-67-0 (eBook), DOI: https://doi.org/10.9734/bpi/rhst/v2/5446E, Available: https://stm.bookpi.org/
    RHST-V2/article/view/10609     
  53. Hadzhikoleva, S., M. Borisova, E. Hadzhikolev, H. Hristov, Model for Assessing Higher Order Thinking Skills in Training in Graph Databases, ICERI2020 Proceedings, 9th-10th November 2020, pp. 6594 – 6603, ISBN: 978-84-09-24232-0, DOI: 10.21125/iceri.2020.1409. Available:  https://library.iated.org/view/hadzhikoleva2020mod 
  54. Tsvetanov, K., Cheresharov, St., Chonkov, Sv., Hristov, Hr., Methodology for Identifying, Eliminating, and Avoiding Errors in Some Programming Languages, Scientific Works of the Union of Scientists, Series B. Technics and Technologies, Plovdiv, 2021, Volume XVIII, pp. 100-106, ISSN 1311 – 9419 (Print), ISSN 2534 – 9384 (Online). Presented at: “Days of Science 2020 at the Union of Scientists – Plovdiv”, November 20-21, 2020, Plovdiv. Available from: https://usb-plovdiv.org/wp- content/uploads/2021/06/2021_tehnika_i_tehnologii_tom_XIX.pdf   
  55. Tsvetanov, K., Cheresharov, St., Chonkov, Sv., Hristov, Hr., Approaches in Software Product Development and Their Application, Scientific Works of the Union of Scientists, Series B. Technics and Technologies, Plovdiv, 2021, Volume XVIII, pp. 107-113, ISSN 1311 – 9419 (Print), ISSN 2534 – 9384 (Online). Presented at: “Days of Science 2020 at the Union of Scientists – Plovdiv”, November 20-21, 2020, Plovdiv. Available from: https://usb-plovdiv.org/wp-content/uploads/2021/06/2021_tehnika_i_tehnologii_tom_XIX.pdf
  56. Chochev, N, Hristov, H., Design Techniques and Practices of Grid Layouts and Content of Web Pages, „Scientific Works of the Union of Scientists in Bulgaria – Plovdiv“. Series C. Technics and Technologies. Vol. XX, ISSN 1311 -9419 (Print); ISSN 2534-9384 (Online), 2022, pp. 99-103. Presented: „Days of Science 2021 at the SUB – Plovdiv“, November 25-27, 2021, Plovdiv Available:​ https://usb-plovdiv.org/wp-ontent/uploads/2022/04/2022_tehnika_i_tehnologii
    _tom_XX.pdf     
  57. Velcheva, Iv., Hristov, Hr., Approach to Specialized Web Design Education in High School Level of Secondary Education, Mathematics and Informatics, Volume 67, Issue 2, 2021, ISSN 1314 – 8532 (Online), ISSN 1310 – 2230 (Print). https://doi.org/10.53656/math2023-2-7-web, (Web of Science)
  58. Hr. Hristov, J. Arcelus-Ulibarrena, Evolution Of Training Methodology in the Era of Software Technologies, In: Research Highlights in Science and Technology, vol 3, Chapter 14, (ed. Hamdy M Afefy), 2023, p.184-198, B P international, UK, London, ISBN: 978-81-19315-09-3 (Print), e-ISBN: 978-81-19315-02-4 (eBook), DOI: 10.9734/bpi/rhst/v3/5872E, Available:​https://stm.bookpi.org/RHST-V3/article/view/10766 
  59. H. Hristov, E. Chobanov, Piezoelectric Crystal Generator for Electricity Generation, Scientific Works of the Union of Scientists in Bulgaria – Plovdiv. Series C. Technics and Technologies. Vol. XXI, ISSN 1311-9419 (Print); ISSN 2534-9384 (Online), 2023, pp, Preprint, Acceptance Letter, Presented: IXthInternational Conference of Young Scientists – Plovdiv 2022, 14-15 July, Plovdiv, Bulgaria.
  60. Hr. Hristov, A. Ignatov, J. Latal, Approach in Installing and Configuring General Program Monitoring Client Devise For IPTV Monitoring Of A1 And Vivacom, International Journal On Information Technologies And Security, Issue no 3 (vol. 16), September 2023, ISSN 1313-8251, (Web of Science)
  61. Radev, V., Hristov, Hr., Visualization of Mathematics Problems for 3rd Grade Through Animated Scenarios in an E-learning Environment, Pedagogy Journal, ISSN 1314–8540 (Online), ISSN 0861–3982 (Print), Issue 6/2023, Volume XCV, (Web of Science®)
  62. H. Gyulyustan, H. Hristov, S. Stavrev, S. Enkov, Measuring and Analysis of Speech-to-text Accuracy of Some Automatic Speech Recognition Services in Dynamic Environment Conditions, Journal of Physics: Conference Series. Presented: International Conference on Electronics, Engineering Physics and Earth Science 2023 (EEPES 2023) 21st-23rd June, 2023 in Kavala, Greece. Available: (Scopus data as of September 2023 Q4, SJR 0,21), Preprint, Acceptance Letter
  63. Hristov, Hr., Chobanov, Em., “Device for Generating Electrical Energy Using Piezoelectric Crystal”, Utility Model Certificate Reg. No. 4477 U1, Application No. 5682, Date of Filing: 02/03/2023, Published for Registration: 17/07/2023.
  64. Hristov, Hr., Guide for Designing and Styling Web Pages with CSS GRID SYSTEM, Publishing House PU “Paisii Hilendarski”, 2023, First Edition, 108 pages, ISBN: 978-619-202-855-8.
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