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Engineering Proceedings, Volume 104, Issue 1

2025 EEPES 2025 - 97 articles

The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025)

Alexandroupolis, Greece | 18–20 June 2025

Volume Editors:
Teodor Iliev, University of Ruse, Ruse, Bulgaria
Ivaylo Stoyanov, University of Ruse, Ruse, Bulgaria
Grigor Mihaylov, University of Telecommunications and Post, Sofia, Bulgaria
Panagiotis Kogias, Democritus University of Thrace, Kavala, Greece
Jacob Fantidis, Democritus University of Thrace, Kavala, Greece

Cover Story: 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.<false,>EEPES 2025 is the premier international event focused on understanding the current state and evolution of science through the lens of engineering physics, electronics devices and microelectronics, telecommunications, optical and electromagnetic communication, artificial intelligence and soft computing, environmental physics and renewable energy and many other disciplines. It is a place for researchers, academics, industry professionals and students alike to present and discuss progress in research, development, standards and applications related to applied and engineering physics.
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Articles (97)

  • Editorial
  • Open Access
420 Views
1 Page

Statement of Peer Review

  • Teodor Iliev,
  • Ivaylo Stoyanov,
  • Grigor Mihaylov,
  • Panagiotis Kogias and
  • Jacob Fantidis

17 September 2025

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 [...]

  • Editorial
  • Open Access
466 Views
2 Pages

Preface: The International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025)

  • Teodor Iliev,
  • Ivaylo Stoyanov,
  • Grigor Mihaylov,
  • Panagiotis Kogias and
  • Jacob Fantidis

16 September 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 [...]

  • Proceeding Paper
  • Open Access
445 Views
8 Pages

15 September 2025

The machine unit design for driving a specific work machine is a complex process, in which factors such as power machine type, power transmission drives, total efficiency coefficient, and total gear ratio determine an accurate model for calculating t...

  • Proceeding Paper
  • Open Access
1 Citations
822 Views
7 Pages

15 September 2025

The aim of this study was to evaluate the influence of factors determining the state of danger heat stress on the udder and thigh temperature of dairy cows. Heat stress was classified by measuring the temperature–humidity index (THI). Surface t...

  • Proceeding Paper
  • Open Access
743 Views
11 Pages

15 September 2025

Power inverters are extensively employed in a wide range of applications such as VSD, PV, UPS, and Vehicle-to-Grid systems. Different control topologies are used in power electronic inverters. Of these, PWM and MLVSIs are implemented to minimize the...

  • Proceeding Paper
  • Open Access
535 Views
6 Pages

Building Application for Software-Defined Network

  • Delyan Genkov,
  • Tsvetan Raykov and
  • Miroslav Slavov

11 September 2025

Software-defined networks are a modern approach to computer networks. With this concept, network devices can be monitored and configured centrally. While the lower layers of a software-defined network—devices and controllers—are relativel...

  • Proceeding Paper
  • Open Access
600 Views
20 Pages

9 September 2025

This paper offers a comprehensive methodology for the synthesis and analysis of active filters, including low-pass, high-pass, and band-pass configurations, utilizing operational amplifiers and multi-loop negative feedback systems. The approach invol...

  • Proceeding Paper
  • Open Access
334 Views
7 Pages

An Approach to Prediction Using Networked Multimedia

  • Vladislav Hinkov and
  • Georgi Krastev

8 September 2025

One of the tasks of statistical analysis is related to the development of forecasts with different horizons. The results of modeling the development trend can also be used for prognostic purposes. At the same time, the assumption is made that during...

  • Proceeding Paper
  • Open Access
2,280 Views
7 Pages

Modeling the Thermal State of a Wind Turbine Generator Considering External Factors

  • Alina Fazylova,
  • Yaroslav Napadailo,
  • Galina V. Rybina,
  • Baurzhan Tultayev,
  • Teodor Iliev and
  • Ivaylo Stoyanov

8 September 2025

This paper presents the mathematical modeling of the thermal state of a 1000 W wind turbine generator (WTG) integrated into a vertical-axis wind turbine (VAWT) system, taking into account external environmental factors, mechanical losses, and the ope...

  • Proceeding Paper
  • Open Access
2,562 Views
7 Pages

Developing a Portal for Learning Relational Databases with Automatic SQL Validation

  • Natalia Spiridonova,
  • Ekaterina Andrianova,
  • Eugenia Rezedinova and
  • Alexander Schukin

8 September 2025

Databases are essential to modern information systems, ensuring reliable and structured data storage. PostgreSQL, a leading database management system, ranked fourth globally in 2022 and offers advantages such as free access and cross-platform compat...

  • Proceeding Paper
  • Open Access
3,738 Views
20 Pages

8 September 2025

Axial flux permanent magnet (AFPM) machines offer some advantages over conventional radial flux machines for the case of a limited space in the axial direction, such as high torque density, compact structure, and modular design ability. They, therefo...

  • Proceeding Paper
  • Open Access
1,927 Views
8 Pages

6 September 2025

This paper presents the design and analysis of a forklift hydraulic system utilizing an open-center configuration equipped with unloading (safety-overflow) valves and an emergency lowering mechanism. The hydraulic system includes an external gear pum...

  • Proceeding Paper
  • Open Access
2,385 Views
8 Pages

Magnetic Nanoparticles for Toxic Wastewater Cleaning:Experimental Study on Phenol

  • Lacramioara Oprica,
  • Larisa Popescu-Lipan,
  • Liviu Sacarescu,
  • Mihai Costache,
  • Cosmin Hincu and
  • Dorina Creanga

6 September 2025

This study focuses on the possibility of cleaning of industrial wastewater with catalytically active magnetic nanoparticles. Cobalt ferrite synthesized by the co-precipitation method was used, as prepared or after surface modification with a silica p...

  • Proceeding Paper
  • Open Access
2,331 Views
8 Pages

6 September 2025

This article presents a design solution for feeding cylindrical parts with axial orientation. A working algorithm was developed to control and synchronize the main components, which was verified via a simulation. The pneumatic and electrical circuits...

  • Proceeding Paper
  • Open Access
2,334 Views
12 Pages

Energetic Analysis for the Improvement of a Cupola Furnace

  • Axel Vargas Sánchez,
  • Ricardo Galindo Bulos,
  • Juan C. Prince,
  • Asunción Zárate and
  • Miguel A. Gijón

6 September 2025

Cupola furnaces rank among the oldest melting technologies in steelmaking, relying predominantly on coke as the primary fuel. In this study, a detailed energy analysis was conducted on a cupola unit used for gray and ductile iron production. Energy a...

  • Proceeding Paper
  • Open Access
4,034 Views
6 Pages

Prediction of Torque Arm Fatigue Life by Fuzzy Logic Method

  • Caner Baybaş,
  • Mustafa Acarer and
  • Fevzi Doğaner

7 September 2025

In this study, a fuzzy-logic-based decision support model is developed to predict the fatigue life of load-bearing system elements such as torque arm. Traditional methods for fatigue life prediction are mostly based on certain mathematical expression...

  • Proceeding Paper
  • Open Access
4,894 Views
13 Pages

Automatic Evaluation Visual Characteristics of Corn Snacks Using Computer Vision

  • Angel Danev,
  • Atanaska Bosakova-Ardenska,
  • Radoslava Gabrova and
  • Hristina Andreeva

5 September 2025

The process of extrusion is a part of many modern manufacturing technologies that are applied in various industrial productions. In the food industry, the process of extrusion is used to produce popular foods such as cereal mixes, confectionery produ...

  • Proceeding Paper
  • Open Access
901 Views
7 Pages

4 September 2025

We present a comparative analysis of three hybrid methodologies for transforming 3D kidney tumor segmentations of volumetric NIfTI data into highly accurate network representations. Exploiting the KiTS23 dataset, we evaluate edge-preserving reconstru...

  • Proceeding Paper
  • Open Access
2 Citations
1,640 Views
17 Pages

Review and Comparative Analysis of Modern Knee Prostheses with Development of a Conceptual Design

  • Akhmejanov Sayat,
  • Zhetenbayev Nursultan,
  • Nurgizat Yerkebulan,
  • Sultan Aidos,
  • Uzbekbayev Arman,
  • Sergazin Gani,
  • Ozhikenov Kassymbek and
  • Nurmangaliyev Asset

4 September 2025

This paper provides a comprehensive review of the structural features and biomechanical functions of modern passive and semi-active knee prostheses, followed by comparative analysis. Based on findings from scientific literature and engineering practi...

  • Proceeding Paper
  • Open Access
886 Views
8 Pages

4 September 2025

The Hall effect is widely used in magnetic field sensors and contactless measurement systems. Accurate modeling of Hall-effect elements is essential for optimizing performance, especially in high-sensitivity applications under controlled conditions l...

  • Proceeding Paper
  • Open Access
512 Views
13 Pages

3 September 2025

This paper explores construction and modelling methods used to create composite transition surfaces from sheet material, with an emphasis on the fabrication of their developments. The main objective is to present effective approaches for generating d...

  • Proceeding Paper
  • Open Access
1,076 Views
11 Pages

Automated Control of Dynamic Loads in Drive Systems

  • Alina Fazylova,
  • Kuanysh Alipbayev,
  • Teodor Iliev and
  • Alisher Aden

4 September 2025

This article discusses the automated control of dynamic loads in drive systems using the example of a wind turbine screw drive. A mathematical model was developed, including differential equations of system motion, the voltage balance of the electric...

  • Proceeding Paper
  • Open Access
916 Views
8 Pages

Assessing Musculoskeletal Health Risks in Standing Occupations

  • Valentina Markova,
  • Zornitsa Petrova and
  • Ivalena Valcheva-Georgieva

3 September 2025

This study investigates the risk of developing musculoskeletal disorders (MSDs) in individuals performing standing tasks, with a focus on real-time posture assessment using motion capture technology. Improper body posture and repetitive movements dur...

  • Proceeding Paper
  • Open Access
1,520 Views
13 Pages

4 September 2025

With advancements in artificial intelligence (AI), deep learning (DL) has become crucial for real-time data analytics in areas like autonomous driving, healthcare, and predictive maintenance; however, its computational and memory demands often exceed...

  • Proceeding Paper
  • Open Access
650 Views
13 Pages

A Reduced Reaction Model for Combustion of n-Pentanol

  • Jaime Tiburcio-Cortés,
  • Juan C. Prince and
  • Asunción Zárate

3 September 2025

n-Pentanol, a promising biofuel, can reduce greenhouse gas emissions while remaining compatible with internal combustion engines. We present a reduced kinetic mechanism comprising 66 species and 292 reactions that captures both high- and low-temperat...

  • Proceeding Paper
  • Open Access
575 Views
6 Pages

3 September 2025

Studied extensively in the present paper is a geometric problem related to the intersection of two conical surfaces with crossed axes. The goal was to derive a spatial intersection curve between the surfaces that resembles the classical Viviani curve...

  • Proceeding Paper
  • Open Access
468 Views
15 Pages

25 August 2025

In the conditions of modern production, the choice of a rational technological process is crucial for the competitiveness and efficiency of enterprises. Traditional decision-making methods are often accompanied by subjectivity and insufficient precis...

  • Proceeding Paper
  • Open Access
605 Views
10 Pages

Wireless Power Harvesting Skin

  • Ioannis Gavriilidis,
  • Adamantios Karakilidis,
  • Apostolos-Christos Tsafaras and
  • Theodoros Kaifas

29 August 2025

Contributing to the quest for renewable energy harvesting, we present, in the work at hand, a conceptual model of a large-scale wireless microwave power harvester that takes the structure of a smart reconfigurable harvesting surface. This structure i...

  • Proceeding Paper
  • Open Access
411 Views
14 Pages

29 August 2025

This paper proposes a hybrid architecture for obtaining digital twins of dynamic systems under conditions of parametric uncertainties and unmodeled dynamics through approximation using deep neural networks (DNNs) and orthonormal Kautz functions. In t...

  • Proceeding Paper
  • Open Access
513 Views
7 Pages

Full-Coverage Radar Antenna

  • Adamantios Karakilidis,
  • Ioannis Gavriilidis,
  • Apostolos-Christos Tsafaras and
  • Theodoros Kaifas

29 August 2025

In the work at hand, we contribute a system study of a full-coverage antenna array for applications ranging from wireless communication base station transceivers to aerospace applications. There are two main objectives in the road toward achieving ac...

  • Proceeding Paper
  • Open Access
1,146 Views
8 Pages

A Prototype of Integrated Remote Patient Monitoring System

  • Georgi Patrikov,
  • Teodora Bakardjieva,
  • Antonina Ivanova,
  • Andriana Ivanova and
  • Fatima Sapundzhi

29 August 2025

The ongoing global shortage of healthcare personnel, exacerbated by demographic changes and the aftermath of the COVID-19 pandemic, has highlighted the need for efficient workforce utilization and innovative technological support in healthcare. This...

  • Proceeding Paper
  • Open Access
1 Citations
588 Views
8 Pages

26 August 2025

Asynchronous motors are used in industry and in the electric drives of cars, trains and bicycles, as they are cheap, easy to maintain and have low energy consumption. In recent years, their importance has increased due to their high efficiency and sa...

  • Proceeding Paper
  • Open Access
1 Citations
918 Views
8 Pages

1 September 2025

Introduced in the present study is a novel method for measuring soil density during standard tillage operations. The methodology involves the use of a strain gauge to measure the surface tensions of the plough body stem, reflecting the resistance for...

  • Proceeding Paper
  • Open Access
1,149 Views
11 Pages

Comparative Analysis of Modern Robotic Demining Complexes and Development of an Automated Mission Planning Algorithm

  • Yerkebulan Nurgizat,
  • Aidos Sultan,
  • Nursultan Zhetenbayev,
  • Abu-Alim Ayazbay,
  • Arman Uzbekbayev,
  • Gani Sergazin and
  • Kuanysh Alipbayev

29 August 2025

This paper presents a comparative analysis of ten state-of-the-art robotic de-mining systems, grouped into (i) sensor-centric platforms for high-precision detection and (ii) rapid mechanical-contact vehicles for clearance. Building on these findings,...

  • Proceeding Paper
  • Open Access
1 Citations
1,427 Views
16 Pages

28 August 2025

This paper presents the design and evaluation of an educational software tool aimed at facilitating the practical exploration of symmetric cryptographic algorithms. The application integrates widely used algorithms, including AES, DES, TripleDES, RC2...

  • Proceeding Paper
  • Open Access
1,083 Views
11 Pages

Cyber-Physical System for Treatment of River and Lake Water

  • Diana Syulekchieva,
  • Blagovesta Midyurova,
  • Aleksandar Mandadzhiev,
  • Ivaylo Belovski,
  • Todor Mihalev and
  • Elena Koleva

29 August 2025

Water plays a fundamental role in sustaining biological processes, ecological functions, and economic systems. However, the progressive pollution of water sources compromises these functions, posing significant threats to water purity, human well-bei...

  • Proceeding Paper
  • Open Access
593 Views
9 Pages

Forecasting the Operation of a Gas Turbine Unit on Hydrogen Fuel

  • Ivan Beloev,
  • Elvira Zvereva,
  • George Marin,
  • Iliya K. Iliev and
  • Yuliya Valeeva

28 August 2025

The development of hydrogen energy can significantly reduce the negative impact on the environment. For the successful implementation of hydrogen technologies, it is necessary to transform existing models of production, distribution, and consumption...

  • Proceeding Paper
  • Open Access
2 Citations
1,786 Views
9 Pages

Prototype of an Integrated Electronic System for Increased Safety and Comfort in a Car

  • Snezhinka Zaharieva,
  • Iordan Stoev,
  • Veselin Chobanov,
  • Presian Enev,
  • Adriana Borodzhieva and
  • Yavor Neikov

29 August 2025

This paper presents a simulation study and development of a prototype of an integrated electronic system, specifically designed to enhance both the safety and the comfort of passengers and drivers in modern vehicles. The proposed system provides inte...

  • Proceeding Paper
  • Open Access
1 Citations
1,243 Views
12 Pages

28 August 2025

Efficient scheduling of work orders in weaving looms is crucial for improving production efficiency and meeting tight delivery deadlines in the textile industry. This study proposes a genetic algorithm (GA)-based model to optimize work order assignme...

  • Proceeding Paper
  • Open Access
2,029 Views
8 Pages

28 August 2025

This research paper analyzes and highlights the benefits of parallel processing to enhance performance and computational efficiency in modern computing systems. It explores two primary models of parallelism—single instruction, multiple data (SI...

  • Proceeding Paper
  • Open Access
1,262 Views
7 Pages

28 August 2025

This paper presents a case study on the integration of embedded IoT hardware with a modern Android application, demonstrated through the development of a compact autoclave system for small-scale food sterilization. The device is controlled by an ESP8...

  • Proceeding Paper
  • Open Access
1,213 Views
12 Pages

27 August 2025

This article describes the hardware and software implementation of an application for monitoring parameters in a room. The reported values are visualized in a web application, which allows for the data to be viewed from anywhere in the world. The dev...

  • Proceeding Paper
  • Open Access
1,096 Views
10 Pages

Research on the Energy Efficiency of the Wireless Sensor Network for Measurement of the Main Physicochemical Parameters of the Soil

  • Tsvetelina Georgieva,
  • Nadezhda Paskova,
  • Eleonora Nedelcheva,
  • Stanislav Penchev and
  • Plamen Daskalov

27 August 2025

This article presents a study of the energy efficiency of a wireless sensor network for measuring the main physicochemical parameters of soil. The main physicochemical parameters of soil are measured—acidity and electrical conductivity. The stu...

  • Proceeding Paper
  • Open Access
4,869 Views
8 Pages

Arduino-Based Sensor System Prototype for Microclimate Monitoring of an Experimental Greenhouse

  • Ivaylo Belovski,
  • Todor Mihalev,
  • Elena Koleva and
  • Aleksandar Mandadzhiev

27 August 2025

Arduino-based sensor systems are gaining widespread adoption in modern technological applications due to their accessibility, low-cost components, diverse sensor compatibility, high reliability, and user-friendly programming. Because of these advanta...

  • Proceeding Paper
  • Open Access
1,489 Views
11 Pages

28 August 2025

This study proposes a deep learning framework to classify anteroposterior (AP) and posteroanterior (PA) chest X-ray projections automatically. Multiple convolutional neural networks (CNNs), including ResNet18, ResNet34, ResNet50, DenseNet121, Efficie...

  • Proceeding Paper
  • Open Access
1,811 Views
13 Pages

27 August 2025

In this article, the development of the software system—a virtual simulator for FATEK programmable controllers for industrial processes—is proposed. The main purpose of the development is to create a virtual tool that emulates the operati...

  • Proceeding Paper
  • Open Access
556 Views
10 Pages

27 August 2025

This paper proposes algorithms for optimal placement of base stations (BSs) and central stations (CSs) in mining quarries to ensure reliable radio communication for automated machinery. The BS placement is modeled as a minimum dominating set problem,...

  • Proceeding Paper
  • Open Access
742 Views
8 Pages

27 August 2025

This study explores the application of profile shift coefficients as a design strategy to eliminate the need for stepped planet gears in a specific type of planetary gear train, referred to as the AA gear train. By appropriately selecting gear tooth...

  • Proceeding Paper
  • Open Access
1,083 Views
10 Pages

ZigBee Cyberattacks Simulation

  • Marieta Haka,
  • Aydan Haka,
  • Veneta Aleksieva and
  • Hristo Valchanov

27 August 2025

ZigBee technology is well-known for wireless network communication and enables low-cost devices operating at low transmission speed and low power consumption in IoT networks. The technology is used for wireless networks through which a large amount o...

  • Proceeding Paper
  • Open Access
1,398 Views
9 Pages

Development of a Machine Learning Algorithm for Predicting Electrical Consumption

  • Dimitrios Kazolis,
  • Jacob Fantidis and
  • Christos Dionyshs Fotakis

28 August 2025

In the contemporary era, the pursuit of precise predictions based on datasets is predominantly motivated by the science of computer systems. Therefore, this study attempts to further enhance prediction efforts. A city-wide electricity consumption dat...

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Eng. Proc. - ISSN 2673-4591