The XIX National Conference with International Participation "EDUCATIONAL TECHNOLOGIES 2023" and the XXIV National Conference with International Participation "ENGINEERING AND NATURAL SCIENCES 2023" were held in Sozopol.

On June 23rd and 24th, the XIX National Conference with International Participation "Educational Technologies '2023" and the XXIV National Conference with International Participation "Engineering and Natural Sciences 2023" were held at the Educational and Sports Health Base "Lazur" of the Technical University – Sofia in the town of Sozopol.

They were officially opened by the Rector of the Technical University – Sofia, Prof. Dr. Eng. Ivan Kralov, the Deputy Rector for Scientific and Applied Activities of the Technical University – Sofia, Assoc. Prof. Dr. Eng. Lidia Galbova, and the Deputy Rector of the Faculty and College – Sliven, Prof. Dr. Eng. Stanimir Karapetkov. During the XIX National Conference with International Participation "Educational Technologies '2023", the authors presented their achievements in the following thematic areas:

-Pedagogy of preschool and primary education;

-Innovations and technologies in pedagogy;

-Management and marketing of modern education.

The XXIV National Conference with International Participation "Engineering and Natural Sciences 2023", whose origins date back to 1993, when the Department of "Mechanics" at the Engineering-Pedagogical Faculty – Sliven organized the first "National Seminar on Synthesis and Analysis of Mechanisms". Subsequently, the scientific directions "Electrical Engineering, Automation and Information Technologies", "Tourism, Food and Textile Technologies", and "Natural Sciences" were included in this scientific forum, and together with the interest of foreign researchers, it became the chain of National Conferences with International Participation "Engineering and Natural Sciences". This year's conference enjoyed exceptional interest with the participation of over 60 researchers presenting 47 reports. Guests at the scientific forum were present from: University of Chemical Technology and Metallurgy – Sofia, Department of "Engineering Ecology"; Institute of Mechanics – Bulgarian Academy of Sciences; Technical University – Varna, Shipbuilding Faculty, Department of "Ecology and Environmental Protection"; E. Miroliao EAD; Technical University – Sofia, Faculty of Energy Engineering, Department of "Hydroaerodynamics and Hydraulic Machines"; Mel Invest Holding AD; Technical University – Sofia, Faculty of Applied Mathematics and Informatics, Engineering-Pedagogical Faculty, and College – Sliven. They presented their achievements in the following thematic areas:

-Machine building, machine mechanics, transport.

-Fluid mechanics, heat and mass transfer.

- Materials Science, Mechanical Engineering and Technologies.

- Electrical Engineering, Automation and Information Technologies.

- Tourism, Food and Textile Technologies.

- Natural Sciences: Mathematics, Physics and Chemistry.