Oleksandr Mitsa

@uzhnu.edu.ua

Department of Information Control Systems and Technologies
Uzhhorod National University

Oleksandr Mitsa


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https://researchid.co/alex_mitsa
32

Scopus Publications

519

Scholar Citations

14

Scholar h-index

18

Scholar i10-index

Scopus Publications

  • DESIGN OF AUTONOMOUS GAZE-TRACKING SYSTEM FOR INCLUSIVE EDUCATION
    Andrii Symkin, Oleksandr Mitsa, Yurii Horoshko, Hanna Tsybko, Viktor Shakotko
    Eastern European Journal of Enterprise Technologies, 2026
    Eye-tracking technology as a means of ensuring the accessibility of education for people with severe musculoskeletal disorders has been investigated in this study. A number of assistive technologies have been devised up to now that possess significant educational potential, but their autonomous use is mainly associated with such difficulties as dependence on the instability of wireless networks or external computing resources. The need to overcome the technological gap between the capabilities of assistive technologies and their real autonomy is a task addressed in this work. The study's result is the designed fully autonomous architecture based on virtual reality headsets (Meta Quest), which enables the execution of all eye image processing activities and provides direct interface control using the device's processor. The hardware was improved (frame miniaturization, transition to a wired USB interface were carried out); software was developed in the Rust language in the OpenXR API (Application Programming Interface) layer format. That has made it possible to get rid of network delays and ensure the system's operation, resistant to any conditions. Direct interaction with the headset hardware is provided by effective optimization of convolutional neural networks and the use of low-level system calls. An immersive graphical user interface (GUI) was designed, successfully tested for system configuration and calibration. The GUI became available directly in the virtual space of the headset. The results could be used for individual learning at home, as well as at inclusive educational institutions or rehabilitation centers that organize training for people with severe musculoskeletal disorders
  • SELECTION OF TARGET FUNCTION IN OPTICAL COATINGS SYNTHESIS PROBLEMS
    Oleksandr Mitsa, Petro Stetsyuk, Serhii Zhukovskyi, Oleksandr Levchuk, Vasyl Petsko, et al.
    System Research and Information Technologies, 2025
    The article presents general information on the use of optical coatings in various industries and analyzes the main approaches to optimizing optical filter structures. An approach to solving a class of optical coating synthesis problems is proposed, based on the formation of a new optimization model. The primary attention is paid to the formalization and analysis of the target function. To determine the quality of the optical coating, the deviation of the spectral characteristics from the required ones was estimated using the least squares, least absolute deviation, and minimum criteria. As a result, both smooth and two non-smooth target functions are proposed and analyzed. The peculiarities of their application in solving optimization problems related to optical coating synthesis are described, and corresponding numerical experiments are presented.
  • DETERMINING THE EFFECTIVENESS OF GPT-4.1-MINI FOR MULTICLASS TEXT CATEGORIZATION IN ENGLISH AND UKRAINIAN
    Yurii Voloshchuk, Oleksandr Mitsa
    Eastern European Journal of Enterprise Technologies, 2025
    The object of this study is the process of multiclass automatic categorization of user queries using large language models under the conditions of a language transition from English to Ukrainian. The scientific task relates to the fact that most modern large language models (LLMs) are optimized for English while their effectiveness for morphologically complex and low-resource languages, particularly Ukrainian, remains insufficiently studied. In this work, an experimental approach was devised and implemented to evaluate the transferability of the GPT-4.1-mini model from English to Ukrainian in the task to categorize 11,047 user queries spanning nine applied domains. The analysis employed conventional metrics (Recall, Precision, Weighted-F1, Macro-F1) alongside a novel indicator, the Uncertainty/Error Rate (U/E), which captures the proportion of model refusals and “hallucinations.” The findings demonstrate that the highest quality was achieved on the English dataset (Macro-F1 = 69.78%, U/E = 0.05%). When Ukrainian prompts were applied, Macro-F1 decreased to 63.73%; however, the U/E equaled 0%, indicating higher reliability of responses. Using English prompts with Ukrainian-language data preserved nearly the same level of accuracy (Macro-F1 = 69.66%), thereby revealing strong internal translation and generalization mechanisms. The novelty of this study is attributed to the use of a large multidomain parallel corpus, the systematic comparison of prompts in two languages, the application of the state-of-the-art model GPT-4.1-mini, and the introduction of the U/E metric as a reliability criterion. The proposed approach demonstrates the feasibility of applying GPT-4.1-mini to Ukrainian-language information services without additional training, particularly for automatic query routing in financial, medical, legal, and other domains.
  • A Comparative Study of Machine Learning Algorithms and the Prompting Approach Using GPT-3.5 Turbo for Text Categorization
    Oleksandr Mitsa, Yurii Voloshchuk, Oleksandr Levchuk, Vasyl Petsko
    Lecture Notes on Data Engineering and Communications Technologies, 2025
  • On Computer Modeling of Quadratic Surface Intersections
    Oleksandr Mitsa, Andrii Shapochka, Ihor Shapochka, Serhii Vapnichnyi, Nataliia Shumylo
    Sist 2025 2025 IEEE 5th International Conference on Smart Information Systems and Technologies Conference Proceedings, 2025
  • Impact of Interface Inhomogeneities on Spectral Characteristics of Optical Filters: Web-Based Modeling Platform
    Oleksandr Mitsa, Oleg Ryaboshchuk, Volodymyr Mitsa, Jozsef Holovacs, Oleksandr Levchuk, et al.
    Sist 2025 2025 IEEE 5th International Conference on Smart Information Systems and Technologies Conference Proceedings, 2025
  • Reversible Laser-Assisted Transformations of Chalcogenide Photonic Media
    Roman Holomb, Volodimir Mitsa, Oleksandr Kondrat, Oleksandr Mitsa, László Himics, et al.
    NATO Science for Peace and Security Series B Physics and Biophysics, 2025
  • The interplay between the topology of nanoclusters and the characteristic of boson peak in As-S glasses
    Pavlo Baloh, Vladimír Tkáč, Róbert Tarasenko, Martin Orendáč, Alžbeta Orendáčová, et al.
    Journal of Non Crystalline Solids, 2024
  • Thermal conductivity of the AsxS100-x glass system at low temperatures
    Pavlo Baloh, Vladimír Tkáč, Róbert Tarasenko, Martin Orendáč, Alžbeta Orendáčová, et al.
    Low Temperature Physics, 2023
    The temperature dependence of the thermal conductivity k(T) of the AsxS100-x glass system was studied down to 1.8 K in a wide range of various (x = 20, 28.6, 40, 45, and 50) compositions. Universal glass anomalies in k(T) were revealed. The temperature dependence k(T) ∼ T2 onset at the lowest temperatures and plateau below 15 K were detected. The plateau formation is sample quality sensitive and composition-dependent. It was experimentally found that even with a slow cooling rate, several samples were cracked. Depending on the sample damage, the additional internal scattering process leads to the k(T) plateau suppression. The observed k(T) temperature dependence is similar to the glassy ceramics-like behavior.
  • Relation between nanocluster approximation and Soft-Potential Model, the role of keystone nanocluster in the thermal conductivity
    Pavlo Baloh, Vladimír Tkáč, Róbert Tarasenko, Martin Orendáč, Alžbeta Orendáčová, et al.
    Journal of Non Crystalline Solids, 2023
  • Ukrainian Redaction of Church Slavonic (URCS): Needs for Digitalization and Text Corpora Platform Generation. Part I
    Ceur Workshop Proceedings, 2023
  • Analyzing Ukrainian Media Texts by Means of Support Vector Machines: Aspects of Language and Copyright
    Maksym Lupei, Oleksandr Mitsa, Vasyl Sharkan, Sabolch Vargha, Nitsa Lupei
    Lecture Notes on Data Engineering and Communications Technologies, 2023
  • Ethnocultural, Educational and Scientific Potential of the Interactive Dialects Map
    Oleksandr Mitsa, Vasyl Sharkan, Vitalii Maksymchuk, Sabolch Varha, Halyna Shkurko
    Sist 2023 2023 IEEE International Conference on Smart Information Systems and Technologies Proceedings, 2023
  • Thermal conductivity of the AsxS100–x glass system at low temperatures
    Pavlo Baloh, Vladimír Tkáč, Róbert Tarasenko, Martin Orendáč, Alžbeta Orendáčová, et al.
    Fizika Nizkikh Temperatur, 2023
  • Gold nanoparticle assisted synthesis and characterization of As–S crystallites: Scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray and Raman spectroscopy combined with DFT calculations
    Roman Holomb, Oleksandr Kondrat, Volodimir Mitsa, Alexander Mitsa, David Gevczy, et al.
    Journal of Alloys and Compounds, 2022
  • Synthesis of a Two Cascade Neural Network for Time Series Forecasting
    Fedir Geche, Olexandr Mitsa, Oksana Mulesa, Petro Horvat
    2022 IEEE 3rd International Conference on System Analysis and Intelligent Computing Saic 2022 Proceedings, 2022
  • Development of the Group Problem Solving Method in Designing Traffic Flows
    Oksana Mulesa, Oleksandr Mitsa, Tamara Radivilova, Fedir Geche, Viktor Dulo
    Sist 2022 2022 International Conference on Smart Information Systems and Technologies Proceedings, 2022
  • The Identification of Mass Media by Text Based on the Analysis of Vocabulary Peculiarities Using Support Vector Machines
    Maksym Lupei, Oleksandr Mitsa, Vasyl Sharkan, Sabolch Vargha, Vasyl Gorbachuk
    Sist 2022 2022 International Conference on Smart Information Systems and Technologies Proceedings, 2022
  • Development of a method to find the location of a logistics hub
    Ceur Workshop Proceedings, 2022
  • Development of an Interactive Map Within the Implementation of Actual State and Public Directions
    Maksym Lupei, Myroslav Shlahta, Oleksandr Mitsa, Yurii Horoshko, Hanna Tsybko, et al.
    Proceedings International Conference on Advanced Computer Information Technologies Acit, 2022
  • Determining the eligibility of candidates for a vacancy using artificial neural networks
    Maksym Lupei, Alexander Mitsa, Igor Povkhan, Vasyl Sharkan
    Proceedings of the 2020 IEEE 3rd International Conference on Data Stream Mining and Processing Dsmp 2020, 2020
  • Reversible laser-assisted structural modification of the surface of As-rich nanolayers for active photonics media
    O. Kondrat, R. Holomb, A. Mitsa, M. Veres, A. Csik, et al.
    Applied Surface Science, 2020
  • Identification of authorship of ukrainianlanguage texts of journalistic style using neural networks
    Maksym Lupei, Alexander Mitsa, Volodymyr Repariuk, Vasyl Sharkan
    Eastern European Journal of Enterprise Technologies, 2020
  • Modeling and first-principles calculation of low-frequency quasi-localized vibrations of soft and rigid As–S nanoclusters
    Roman Holomb, Paul Ihnatolia, Oleksandr Mitsa, Volodimyr Mitsa, László Himics, et al.
    Applied Nanoscience Switzerland, 2019
  • Modeling the effect of inhomogeneties on spectral characteristic of narrow-band optical filters
    Василь Іванович Пецко, Олександр Володимирович Міца
    Eastern European Journal of Enterprise Technologies, 2014
  • Effects of layer nanodefects on the light transmission by optical elements with multilayer interference coatings
    Ukrainian Journal of Physics, 2011
  • Parameter optimization problems for multilayer optical coatings
    Kibernetika I Sistemnyj Analiz, 2005
  • Parameter optimization problems for multilayer optical coatings
    P. I. Stetsyuk, A. B. Mitsa
    Cybernetics and Systems Analysis, 2005
  • Mathematical modeling of spectral characteristics of optical coatings with slightly inhomogeneous chalcogenide films
    Journal of Optoelectronics and Advanced Materials, 2005
  • Optical coatings based on non-crystalline films with transition substrate-film layers: Sims and auger profiles
    Journal of Optoelectronics and Advanced Materials, 2005
  • Optimization of a structure of inhomogeneous film for anti-reflecting of high refractive substructures
    Upravlyayushchie Sistemy I Mashiny, 2003
  • Influence of a transition film-substrate layers on optical properties of the multilayer structures
    Yury A. Pervak, A. Mitsa, I. Holovach, Ishtvan V. Fekeshgazi
    Proceedings of SPIE the International Society for Optical Engineering, 2001

RECENT SCHOLAR PUBLICATIONS

  • DESIGN OF AUTONOMOUS GAZE-TRACKING SYSTEM FOR INCLUSIVE EDUCATION.
    A Symkin, O Mitsa, Y Horoshko, H Tsybko, V Shakotko
    Eastern-European Journal of Enterprise Technologies 1 (9 (139)), 68 , 2026
    2026
  • Selection of target function in optical coatings synthesis problems
    ОВ Міца, ПІ Стецюк, СС Жуковський, ОМ Левчук, ВІ Пецко, ІВ Шапочка
    Системні дослідження та інформаційні технології, 48-51 , 2025
    2025
  • of Chalcogenide Photonic Media
    R Holomb, V Mitsa, O Kondrat, O Mitsa, L Himics, L Péter, AJ Sadeq, ...
    Nanotechnological Advances in Environmental, Cyber and CBRN Security, 327 , 2025
    2025
  • DETERMINING THE EFFECTIVENESS OF GPT-4.1-MINI FOR MULTICLASS TEXT CATEGORIZATION IN ENGLISH AND UKRAINIAN.
    Y Voloshchuk, O Mitsa
    Eastern-European Journal of Enterprise Technologies 5 , 2025
    2025
  • On Computer Modeling of Quadratic Surface Intersections
    O Mitsa, A Shapochka, I Shapochka, S Vapnichnyi, N Shumylo
    2025 IEEE 5th International Conference on Smart Information Systems and … , 2025
    2025
  • Impact of Interface Inhomogeneities on Spectral Characteristics of Optical Filters: Web-Based Modeling Platform
    O Mitsa, O Ryaboshchuk, V Mitsa, J Holovacs, O Levchuk, V Petsko
    2025 IEEE 5th International Conference on Smart Information Systems and … , 2025
    2025
  • A Comparative Study of Machine Learning Algorithms and the Prompting Approach Using
    V Petsko
    Advances in Computer Science for Engineering and Education VII, 156 , 2025
    2025
  • Табори з програмування: як вони формують майбутнє поколiння IТ-спецiалiстiв
    В Сергiй, М Дронь, К Каталін
    ЗУІ ім. Ференца Ракоці ІІ , 2025
    2025
  • Визначення максимальної клiки при накладаннi обмежень на кiлькiсть ребер
    О Мiца, А Шапочка, I Шапочка, В Дуло
    ЗУІ ім. Ференца Ракоці ІІ , 2025
    2025
  • Інтерактивна мапа діалектів України: технологічні рішення та перспективи використання.
    ГІ Дулішкович, ОВ Міца
    2025
  • Табори з програмування: як вони формують майбутнє покоління ІТ-спеціалістів
    СД Вапнічний, МФ Дронь, КЙ Кучінка, ОВ Міца
    2025
  • КОМП’ЮТЕРНЕ МОДЕЛЮВАННЯ ПЕРЕТИНІВ КВАДРАТИЧНИХ ПОВЕРХОНЬ
    А Шапочка, О Міца
    Матеріали конференцій МЦНД, 219-224 , 2024
    2024
  • Reversible Laser-Assisted Transformations of Chalcogenide Photonic Media
    R Holomb, V Mitsa, O Kondrat, O Mitsa, L Himics, L Péter, AJ Sadeq, ...
    International Scientific Conference Management and Engineering, 327-338 , 2024
    2024
  • ОЦІНКА СТАБІЛЬНОСТІ РЕЗУЛЬТАТІВ КАТЕГОРИЗАЦІЇ ТЕКСТУ З ВИКОРИСТАННЯМ PROMPTING ПІДХОДУ З ВЕЛИКИМИ МОВНИМИ МОДЕЛЯМИ
    Ю Волощук, О Міца
    VII Міжнародна наукова конференція «Здобутки та досягнення прикладних та … , 2024
    2024
  • ПОРІВНЯННЯ PROMPTING ПІДХОДІВ З ВИКОРИСТАННЯМ GPT 4-TURBO ДЛЯ ТЕКСТОВОЇ КАТЕГОРИЗАЦІЇ
    Ю Волощук, О Міца
    Матеріали конференцій МЦНД, 221–223-221–223 , 2024
    2024
  • The interplay between the topology of nanoclusters and the characteristic of boson peak in As-S glasses
    P Baloh, V Tkáč, R Tarasenko, M Orendáč, A Orendáčová, O Mitsa, ...
    Journal of Non-Crystalline Solids 631, 122913 , 2024
    2024
    Citations: 5
  • A Comparative Study of Machine Learning Algorithms and the Prompting Approach Using GPT-3.5 Turbo for Text Categorization
    O Mitsa, Y Voloshchuk, O Levchuk, V Petsko
    International Conference on Computer Science, Engineering and Education … , 2024
    2024
    Citations: 2
  • Порівняння ефективності текстової категоризації за допомогою prompting підходу з використанням GPT-3.5-Turbo та GPT-4-Turbo.
    ЮО Волощук, ОВ Міца
    2024
    Citations: 2
  • Ефективність генерації коду штучним інтелектом GPT-4O для україномовних задач різної складності платформи EOLYMP
    АЯ Михалко, ОВ Міца
    2024
    Citations: 1
  • Мережеві задачі оптимізації: моделі та програми
    ПІ Стецюк, ОВ Міца, ВО Стовба
    2024

MOST CITED SCHOLAR PUBLICATIONS

  • Identification of authorship of Ukrainian-language texts of journalistic style using neural networks
    M Lupei, A Mitsa A, V Repariuk, V Sharkan
    2020
    Citations: 47
  • Методичні підходи до розв’язування олімпіадних задач з інформатики
    ЮВ Горошко, ОВ Міца, ВІ Мельник
    2019
    Citations: 22
  • Influence of transition film-substrate layers on optical properties of the multilayer structures
    YA Pervak, A Mitsa, I Holovach, IV Fekeshgazi
    Selected Papers from the International Conference on Optoelectronic … , 2001
    2001
    Citations: 22
  • The identification of mass media by text based on the analysis of vocabulary peculiarities using support vector machines
    M Lupei, O Mitsa, V Sharkan, S Vargha, V Gorbachuk
    2022 International Conference on Smart Information Systems and Technologies … , 2022
    2022
    Citations: 20
  • Системний аналіз: навч.-метод. посіб.
    ОВ Міца, ВО Лавер
    2021
    Citations: 20
  • Development of an interactive map within the implementation of actual state and public directions
    M Lupei, M Shlahta, O Mitsa, Y Horoshko, H Tsybko, V Gorbachuk
    2022 12th International Conference on Advanced Computer Information … , 2022
    2022
    Citations: 19
  • Analyzing Ukrainian media texts by means of support vector machines: aspects of language and copyright
    M Lupei, O Mitsa, V Sharkan, S Vargha, N Lupei
    International Conference on Computer Science, Engineering and Education … , 2023
    2023
    Citations: 18
  • Mathematical modeling of spectral characteristics of optical coatings with slightly inhomogeneous chalcogenide films
    A Mitsa, V Mitsa, A Ugrin
    Journal of Optoelectronics and Advanced Materials 7 (2), 955-962 , 2005
    2005
    Citations: 17
  • MODELLING OF SPECTRAL CHARACTERISTICS OF INHOMOGENEOUS (GRADIENT) ANTI-REFLECTIVE COATINGS BASED ON CHALCOGENIDE GLASSES
    ОВ Міца, ВМ Міца, ОМ Угрин
    2005
    Citations: 16
  • Modelling spectral characteristics of structures with the layers based on dissociative materials
    J Golovach, A Mitsa
    Book of Abstract 40th Hungarian conference on Spectrochemisty, M25 , 1997
    1997
    Citations: 16
  • Gold nanoparticle assisted synthesis and characterization of As–S crystallites: Scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray and Raman spectroscopy …
    R Holomb, O Kondrat, V Mitsa, A Mitsa, D Gevczy, D Olashyn, L Himics, ...
    Journal of Alloys and Compounds 894, 162467 , 2022
    2022
    Citations: 15
  • Parameter Optimization Problems for Multilayer Optical Coatings
    PI Stetsyuk, AB Mitsa
    Cybernetics and systems analysis 41 (4), 564-571 , 2005
    2005
    Citations: 15
  • Computer modelling of characteristics of structures with short periods
    J Holovacs, A Mitsa, V Mitsa
    proc. 4th inter. conf./J. Holovacs, A. Mitsa, V. Mitsa//Applied Informatics … , 1999
    1999
    Citations: 15
  • Ethnocultural, educational and scientific potential of the interactive dialects map
    O Mitsa, V Sharkan, V Maksymchuk, S Varha, H Shkurko
    2023 IEEE International Conference on Smart Information Systems and … , 2023
    2023
    Citations: 14
  • Determining the eligibility of candidates for a vacancy using artificial neural networks
    M Lupei, A Mitsa, I Povkhan, V Sharkan
    2020 IEEE Third International Conference on Data Stream Mining & Processing … , 2020
    2020
    Citations: 13
  • Оптимізація характеристик оптичних покрить на основі неоднорідних плівок з різним типом розподілу показника заломлення
    ОВ Міца
    Наук. вісник Ужгород. ун-ту. Сер. матем. і інф.–2001. 6, 95-99 , 2001
    2001
    Citations: 13
  • Modelling of Spectral Characteristics of Short-period Structures with Slightly Inhomogeneous Films Based on Wide Bandgap Optical Materials
    AV Mitsa, IV Fekeshgazi, M Gomes
    Proc. 8th World Multiconference on Systemics, Cybernetics and Informatics … , 2004
    2004
    Citations: 11
  • Огляд систем підготовки до олімпіад з інформатики в деяких країнах
    ВІ Мельник, ЮВ Горошко, ОВ Міца
    Актуальні питання сучасної інформатики, 21-23 , 2017
    2017
    Citations: 10
  • Relation between nanocluster approximation and Soft-Potential Model, the role of keystone nanocluster in the thermal conductivity
    P Baloh, V Tkáč, R Tarasenko, M Orendáč, A Orendáčová, O Mitsa, ...
    Journal of Non-Crystalline Solids 600, 122040 , 2023
    2023
    Citations: 9
  • Synthesis of a two cascade neural network for time series forecasting
    F Geche, O Mitsa, O Mulesa, P Horvat
    2022 IEEE 3rd International Conference on System Analysis & Intelligent … , 2022
    2022
    Citations: 9