Grigor Mihaylov
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Grigor Mihaylov has a total of 49 co-authors. Here are the top co-authors by number of shared publications:
- Teodor Iliev
Department of Telecommunication, University of Ruse, 7004 Ruse, Bulgaria
32 shared publications - Ivaylo Stoyanov
Department of Electrical Power Engineering, University of Ruse, 7004 Ruse, Bulgaria
31 shared publications - Elena Ivanova
University of Ruse
12 shared publications - Jacob G. Fantidis
Democritus University of Thrace
5 shared publications - Boris Evstatiev
Department of Automatics and Electronics, Faculty of Electrical Engineering, Electronics, and Automation, University of Ruse “Angel Kanchev”, 7004 Ruse, Bulgaria
4 shared publications E. P. Ivanova
4 shared publications
Latest Publications
- Open Access
- 28 October 2026
- Published by MDPI AG in Engineering Proceedings
- Vol. 154 (1) , 108
Preface and Statement of Peer Review: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2026)
The fifth edition of the International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2026) was held in a hybrid format at Bandırma Onyedi Eylül University, Bandırma, Türkiye, from 24 to 27 June 2026
- 28 October 2026
- Published by MDPI AG in Engineering Proceedings
- Vol. 154 (1) , 108
Open AccessPreface and Statement of Peer Review: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2026)
The fifth edition of the International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2026) was held in a hybrid format at Bandırma Onyedi Eylül University, Bandırma, Türkiye, from 24 to 27 June 2026
- Open Access
- 8 September 2026
- Published by MDPI AG in Engineering Proceedings
- Vol. 154 (1) , 70
Methodology for Measuring Corrosion Growth of Drill Rods in Operating Conditions
This article proposes a methodology for rapid measurement of corrosion growth in drill rods. Oil and gas production in real field conditions is associated with frequent interruptions, measurements, failures, and, above all, high risk. Usually, methods used to determine corrosion growth are time-consuming and expensive. In field conditions, it is useful to immediately determine the rod condition. This will ensure accident-free operation over an extended period and will provide security to personnel and facilities. In addition, increasing security will improve technical, economic, and social positive effects. Therefore, this is done to achieve sustainable development criteria. Applying on-site measurement methods avoids continuous tracking of temperature, pressure, and other factors related to corrosion rate. The proposed methodology supports high-efficiency oil and natural gas production and environmental protection, in accordance with sustainable development criteria. It provides a good basis for future development not only for the workers to implement new methods of work tracking but also for the company to achieve increased efficiency in mining. Future work includes validating the methodology with real measurements and building a rod wear model.
- 8 September 2026
- Published by MDPI AG in Engineering Proceedings
- Vol. 154 (1) , 70
Open AccessMethodology for Measuring Corrosion Growth of Drill Rods in Operating Conditions
This article proposes a methodology for rapid measurement of corrosion growth in drill rods. Oil and gas production in real field conditions is associated with frequent interruptions, measurements, failures, and, above all, high risk. Usually, methods used to determine corrosion growth are time-consuming and expensive. In field conditions, it is useful to immediately determine the rod condition. This will ensure accident-free operation over an extended period and will provide security to personnel and facilities. In addition, increasing security will improve technical, economic, and social positive effects. Therefore, this is done to achieve sustainable development criteria. Applying on-site measurement methods avoids continuous tracking of temperature, pressure, and other factors related to corrosion rate. The proposed methodology supports high-efficiency oil and natural gas production and environmental protection, in accordance with sustainable development criteria. It provides a good basis for future development not only for the workers to implement new methods of work tracking but also for the company to achieve increased efficiency in mining. Future work includes validating the methodology with real measurements and building a rod wear model.
- Open Access
- 30 January 2026
- Published by MDPI AG in Journal of Eye Movement Research
- Vol. 19 (1) , 14
Visual Evaluation Strategies in Art Image Viewing: An Eye-Tracking Comparison of Art-Educated and Non-Art Participants
Understanding how tacit knowledge embedded in visual materials is accessed and utilized during evaluation tasks remains a key challenge in human–computer interaction and visual expertise research. Although eye-tracking studies have identified systematic differences between experts and novices, findings remain inconsistent, particularly in art-related visual evaluation contexts. This study examines whether tacit aspects of visual evaluation can be inferred from gaze behavior by comparing individuals with and without formal art education. Visual evaluation was assessed using a structured, prompt-based task in which participants inspected artistic images and responded to items targeting specific visual elements. Eye movements were recorded using a screen-based eye-tracking system. Areas of Interest (AOIs) corresponding to correct-answer regions were defined a priori based on expert judgment and item prompts. Both AOI-level metrics (e.g., fixation count, mean, and total visit and gaze durations) and image-level metrics (e.g., fixation count, saccade count, and pupil size) were analyzed using appropriate parametric and non-parametric statistical tests. The results showed that participants with an art-education background produced more fixations within AOIs, exhibited longer mean and total AOI visit and gaze durations, and demonstrated lower saccade counts than participants without art education. These patterns indicate more systematic and goal-directed gaze behavior during visual evaluation, suggesting that formal art education may shape tacit visual evaluation strategies. The findings also highlight the potential of eye tracking as a methodological tool for studying expertise-related differences in visual evaluation processes.
- 30 January 2026
- Published by MDPI AG in Journal of Eye Movement Research
- Vol. 19 (1) , 14
Open AccessVisual Evaluation Strategies in Art Image Viewing: An Eye-Tracking Comparison of Art-Educated and Non-Art Participants
Understanding how tacit knowledge embedded in visual materials is accessed and utilized during evaluation tasks remains a key challenge in human–computer interaction and visual expertise research. Although eye-tracking studies have identified systematic differences between experts and novices, findings remain inconsistent, particularly in art-related visual evaluation contexts. This study examines whether tacit aspects of visual evaluation can be inferred from gaze behavior by comparing individuals with and without formal art education. Visual evaluation was assessed using a structured, prompt-based task in which participants inspected artistic images and responded to items targeting specific visual elements. Eye movements were recorded using a screen-based eye-tracking system. Areas of Interest (AOIs) corresponding to correct-answer regions were defined a priori based on expert judgment and item prompts. Both AOI-level metrics (e.g., fixation count, mean, and total visit and gaze durations) and image-level metrics (e.g., fixation count, saccade count, and pupil size) were analyzed using appropriate parametric and non-parametric statistical tests. The results showed that participants with an art-education background produced more fixations within AOIs, exhibited longer mean and total AOI visit and gaze durations, and demonstrated lower saccade counts than participants without art education. These patterns indicate more systematic and goal-directed gaze behavior during visual evaluation, suggesting that formal art education may shape tacit visual evaluation strategies. The findings also highlight the potential of eye tracking as a methodological tool for studying expertise-related differences in visual evaluation processes.
- Open Access
- 30 January 2026
- Published by MDPI AG in Engineering Proceedings
- Vol. 122 (1) , 30
Preface and Statement of Peer-Review: The 6th International Conference on Communications, Information, Electronic and Energy Systems (CIEES 2025)
The conference is aimed to provide an international forum for researchers, academics, people in industry, and students to address recent research results and to present and discuss their ideas, theories, technologies, systems, tools, applications, works in progress and experiences on all theoretical and practical issues arising in telecommunications, electronics, signal processing and applications, information technologies, energy, automotive and industrial engineering.
- 30 January 2026
- Published by MDPI AG in Engineering Proceedings
- Vol. 122 (1) , 30
Open AccessPreface and Statement of Peer-Review: The 6th International Conference on Communications, Information, Electronic and Energy Systems (CIEES 2025)
The conference is aimed to provide an international forum for researchers, academics, people in industry, and students to address recent research results and to present and discuss their ideas, theories, technologies, systems, tools, applications, works in progress and experiences on all theoretical and practical issues arising in telecommunications, electronics, signal processing and applications, information technologies, energy, automotive and industrial engineering.
- Open Access
- 17 September 2025
- Published by MDPI AG in Engineering Proceedings
- Vol. 104 (1) , 97
Statement of Peer Review
In submitting conference proceedings to Engineering Proceedings, the volume editors of the proceedings certify to the publisher that all papers published in this volume have been subjected to peer review administered by the volume editors
- 17 September 2025
- Published by MDPI AG in Engineering Proceedings
- Vol. 104 (1) , 97
Open AccessStatement of Peer Review
In submitting conference proceedings to Engineering Proceedings, the volume editors of the proceedings certify to the publisher that all papers published in this volume have been subjected to peer review administered by the volume editors
- Open Access
- 16 September 2025
- Published by MDPI AG in Engineering Proceedings
- Vol. 104 (1) , 96
Preface: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025)
The fourth edition of the International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025) was held in hybrid mode in Alexandroupolis, Greece, from 18 to 20 June 2025
- 16 September 2025
- Published by MDPI AG in Engineering Proceedings
- Vol. 104 (1) , 96
Open AccessPreface: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025)
The fourth edition of the International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025) was held in hybrid mode in Alexandroupolis, Greece, from 18 to 20 June 2025
- Open Access
- 25 August 2025
- Published by MDPI AG in Engineering Proceedings
- Vol. 104 (1) , 29
Electromagnetic Compatibility Analysis in the Design of Reliable Energy Systems of a Telecommunication Equipment
The reliability of power supply systems is of utmost importance for telecommunications. In our daily lives, we are used to having constant access to the power grid with negligible risks. Standards and practices established over the years guarantee minimal problems for the household consumer and accidents in their electrical appliances. Often, the biggest inconvenience of a power failure for the average person is having to set the clock on the stove or use the flashlight on their phone. However, we rarely realize how fragile the balance on which all this is based is, but telecom companies are fully aware of this fact. Regardless of whether the problem comes from natural phenomena, accidental or intentional damage, or defects in the equipment, the equipment used in telecommunications technologies is extremely sensitive, and it is necessary to take protective measures.
- 25 August 2025
- Published by MDPI AG in Engineering Proceedings
- Vol. 104 (1) , 29
Open AccessElectromagnetic Compatibility Analysis in the Design of Reliable Energy Systems of a Telecommunication Equipment
The reliability of power supply systems is of utmost importance for telecommunications. In our daily lives, we are used to having constant access to the power grid with negligible risks. Standards and practices established over the years guarantee minimal problems for the household consumer and accidents in their electrical appliances. Often, the biggest inconvenience of a power failure for the average person is having to set the clock on the stove or use the flashlight on their phone. However, we rarely realize how fragile the balance on which all this is based is, but telecom companies are fully aware of this fact. Regardless of whether the problem comes from natural phenomena, accidental or intentional damage, or defects in the equipment, the equipment used in telecommunications technologies is extremely sensitive, and it is necessary to take protective measures.
- Open Access
- 4 February 2025
- Published by Asociatia EduSoft in BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE
- Vol. 16 (1) , 306-314
On Integrating Mixed Reality within University Curricula
The paper describes the architecture and implementation of an experimental framework based on a software platform for enhancing practical and theoretical learning capacities among students in different fields of specialisation by using mixed reality. This platform allows students’ effective interaction with a set of experimental models in two ways: by using interactive augmented reality based mobile applications or by using complete immersion. A case study on using this platform within a target group of students from University of Bacău, Romania is provided and some implications of this teaching approach are analysed. The results have empirically proved that using a learning environment based on mixed reality in teaching improves participatory culture, technical knowledge, and learning satisfaction degree of students. This study also emphasises the need for improvements in the integration of this framework to ensure that the technology's use is not limited to specific courses or user groups.
- 4 February 2025
- Published by Asociatia EduSoft in BRAIN. BROAD RESEARCH IN ARTIFICIAL INTELLIGENCE AND NEUROSCIENCE
- Vol. 16 (1) , 306-314
Open AccessOn Integrating Mixed Reality within University Curricula
The paper describes the architecture and implementation of an experimental framework based on a software platform for enhancing practical and theoretical learning capacities among students in different fields of specialisation by using mixed reality. This platform allows students’ effective interaction with a set of experimental models in two ways: by using interactive augmented reality based mobile applications or by using complete immersion. A case study on using this platform within a target group of students from University of Bacău, Romania is provided and some implications of this teaching approach are analysed. The results have empirically proved that using a learning environment based on mixed reality in teaching improves participatory culture, technical knowledge, and learning satisfaction degree of students. This study also emphasises the need for improvements in the integration of this framework to ensure that the technology's use is not limited to specific courses or user groups.
- Open Access
- 12 September 2024
- Published by MDPI AG in Engineering Proceedings
- Vol. 70 (1) , 59
Preface: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2024)
The third edition of the International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2024) was held in hybrid mode in Kavala, Greece, from 19 to 21 June 2024
- 12 September 2024
- Published by MDPI AG in Engineering Proceedings
- Vol. 70 (1) , 59
Open AccessPreface: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2024)
The third edition of the International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2024) was held in hybrid mode in Kavala, Greece, from 19 to 21 June 2024
- Open Access
- 30 July 2024
- Published by MDPI AG in Electronics
- Vol. 13 (15) , 3000
Determining the Perception Created by Health Warnings on Plain Cigarette Packs with Visual Attention: Eye-Tracking Technique
This study examines the effects of the plain packaging policy implemented in Türkiye, analyzing how different demographic groups perceive health warnings on cigarette packaging. Employing advanced eye-tracking technology, the research identifies distinct visual attention patterns between smokers and non-smokers when exposed to ‘Anxiety’ and ‘Disturbing’ visual cues. Detailed metrics, including fixation counts, durations, and saccade amplitudes, are used to measure and analyze the responses of these groups to the health warnings. The findings reveal that non-smokers significantly focus more on textual warnings, suggesting that text-based elements are more impactful for this group. Conversely, smokers tend to either avoid or become desensitized to disturbing imagery. Additionally, the study finds that female participants exhibit higher saccade amplitudes compared to males, indicating a more thorough examination of the packaging. This gender-specific difference is especially pronounced in their responses to ‘Disturbing’ images, where females show greater engagement, pointing to an increased sensitivity to such stimuli. These insights not only advance our understanding of effective health communication but also underscore the importance of designing public health interventions that cater to the unique responses of different demographic groups. This research significantly enriches the field of tobacco control, providing evidence-based strategies to enhance the effectiveness of visual warnings, thereby supporting targeted smoking cessation efforts.
- 30 July 2024
- Published by MDPI AG in Electronics
- Vol. 13 (15) , 3000
Open AccessDetermining the Perception Created by Health Warnings on Plain Cigarette Packs with Visual Attention: Eye-Tracking Technique
This study examines the effects of the plain packaging policy implemented in Türkiye, analyzing how different demographic groups perceive health warnings on cigarette packaging. Employing advanced eye-tracking technology, the research identifies distinct visual attention patterns between smokers and non-smokers when exposed to ‘Anxiety’ and ‘Disturbing’ visual cues. Detailed metrics, including fixation counts, durations, and saccade amplitudes, are used to measure and analyze the responses of these groups to the health warnings. The findings reveal that non-smokers significantly focus more on textual warnings, suggesting that text-based elements are more impactful for this group. Conversely, smokers tend to either avoid or become desensitized to disturbing imagery. Additionally, the study finds that female participants exhibit higher saccade amplitudes compared to males, indicating a more thorough examination of the packaging. This gender-specific difference is especially pronounced in their responses to ‘Disturbing’ images, where females show greater engagement, pointing to an increased sensitivity to such stimuli. These insights not only advance our understanding of effective health communication but also underscore the importance of designing public health interventions that cater to the unique responses of different demographic groups. This research significantly enriches the field of tobacco control, providing evidence-based strategies to enhance the effectiveness of visual warnings, thereby supporting targeted smoking cessation efforts.