CHEMISTRY, PHYSICS & ECOLOGY

Chairmen: Assoc. Prof. Stefan Valkov, PhD
Building 1, Hall 1406

 ANALYSIS OF MONITORING THE STATE OF FOREST ECOSYSTEMS
IN BULGARIA
Dragomir Vassilev
Technical University of Gabrovo, Gabrovo, Bulgaria

INFLUENCE OF BEAM POWER ON THE STRUCTURE OF TITANIUM CARBIDE COATINGS FORMED BY ELECTRON BEAM SURFACE MODIFICATION
Daniela Nedeva
Technical University of Gabrovo, Gabrovo, Bulgaria

FACTORS FOR THE FORMATION OF ROAD SEDIMENT
IN URBAN AREAS
Daniela Toneva, Iva Vasileva
Technical University of Varna, Varna, Bulgaria

MOLECULAR DYNAMICS STUDY OF THE EFFECT OF COOLING RATE ON THE MICROSTRUCTURAL EVOLUTION OF Zr56Co28Al16 ALLOY
Murat Celtek, Unal Domekeli
Trakya University, Edirne – Türkiye

INVESTIGATION OF THE MELTING PROCESS OF NIOBIUM USING TWO DIFFERENT POTENTIALS: A MOLECULAR DYNAMICS SIMULATION STUDY
Murat Celtek, Unal Domekeli
Trakya University, Edirne, Türkiye

OPTIMIZATION STUDY ON THE INFILL DENSITY OF 3D PRINTED PETG COMPONENTS
Nikolay Petrov¹, Maria Ormanova¹, ^{2, 3}, Iliya Zhelezarov^1,3
1 Technical University of Gabrovo, Gabrovo, Bulgaria
2 Institute of Electronics of Bulgarian Academy of Sciences, Sofia, Bulgaria
3 Center of Competence “Smart Mechatronic, Eco-and Energy-Saving Systems and Technologies”, Bulgaria

3D PRINTING OF POLYMERS: METHODS AND CURRENT PROGRESS
Nikolay Petrov1, Maria Ormanova^{1, 2, 3}, Iliya Zhelezarov^1,3
1 Technical University of Gabrovo, 4 H. Dimitar Str., 5300 Gabrovo, Bulgaria
2 Institute of Electronics of Bulgarian Academy of Sciences, Sofia, Bulgaria
3 Center of Competence “Smart Mechatronic, Eco-and Energy-Saving Systems and Technologies”, Gabrovo, Bulgaria

WATER POLLUTION TREATMENT IN THERMAL POWER PLANTS
Florim Kuliqi¹, Dragomir Vassilev²
1 University of Pristina, R. Kosovo
2 Technical University of Gabrovo, Bulgaria

ANALYSIS OF THE ENVIRONMENTAL IMPACT ASSESSMENT OF POLYMETALLIC ORE MINING
Dragomir Vassilev
Technical University of Gabrovo, Bulgaria

A MOLECULAR DYNAMICS SIMULATION STUDY OF THE MELTING BEHAVIOUR OF IRIDIUM NANOPARTICLES
Unal Domekeli, Arda Kolcular
Trakya University, Edirne, Türkiye

THE SHAPE EFFECT ON THE MELTING PROCESS OF ALUMINUM NANOWIRES: A MOLECULAR DYNAMICS STUDY
Unal Domekeli, Murat Celtek
Trakya University, Edirne, Türkiye

MOLECULAR DYNAMICS SIMULATION STUDY ON THE STRUCTURAL EVOLUTION OF LIQUID NICKEL NANOPARTICLES DURING RAPID COOLING
Cem Canan, Murat Celtek, Unal Domekeli
Trakya University, Edirne, Türkiye

SIZE DEPENDENCE ON MELTING OF COPPER NANOPARTICLES VIA MOLECULAR DYNAMICS SIMULATION
Cem Canan1, Murat Çeltek2
1 Edirne Vocational College of Technical Science, Trakya University, 22030, Edirne – Türkiye
2 Faculty of Education, Trakya University, 22030, Edirne – Türkiye

SUPERFOODS AND MEDICINAL PLANTS - SOURCE OF SUGARS, INULIN AND LOW-MOLECULAR FRUCTANS
Nadezhda Petkova¹, Dobromira Yaneva^1,2, Ivanka Hambarlyiska¹, Dragomir Vassilev²
1 University of Food Technologies, Plovdiv, Bulgaria
2 Technical University of Gabrovo, Gabrovo, Bulgaria

CHARACTERIZATION, FUNCTIONAL PROPERTIES AND APPLICATIONS OF POLYSACCHARIDES
Dobromira Yaneva, Dragomir Vassilev
Technical University of Gabrovo, Gabrovo Bulgaria

COMFREY (SYMPHYTUM OFFICINALE L.): PHYTOCHEMICAL PROFILE, ANTIOXIDANT PROPERTIES, AND THERAPEUTIC POTENTIAL
Kristiyan Stefanov¹, Dragomir Vassilev²
1University of Food Technologies, Plovdiv, Bulgaria
2Technical University of Gabrovo, Gabrovo, Bulgaria

PID TEMPERATURE CONTROL OF A CHEMICAL PROCESS
Sara Stanišić, Sanja Antić, Mihailo Knežević, Milentije Luković
University of Kragujevac, Faculty of Technical Sciences Čačak, Čačak, Serbia

RADIOLOGICAL PROFILE OF PUBLIC DRINKING WATER FOUNTAINS IN NIKOLAEVKA, BULGARIA
Daniela Toneva, Desislava Dimitrova, Iva Vasileva
Technical University of Varna, Varna, Bulgaria

RESEARCH ON SOME NATURAL RADIONUCLIDES IN RAPESEED (BRASSICA NAPUS)
Nina Arhangelova, Seniha Salim, Yordanka Hristova
Konstantin Preslavsky University of Shumen, Shumen, Bulgaria

ASSESSMENT OF NATURAL RADIONUCLIDES IN PURPLE DEAD-NETTLE (LAMIUM PURPUREUM)
Seniha Salim, Teodora Dimova, Tatyana Dimitrova, Dimitrina Radeva,
Nina Arhangelova
Konstantin Preslavsky University of Shumen, Shumen, Bulgaria

INFLUENCE OF BEAM POWER ON THE POSSIBILITY OF OBTAINING OF TI-NB ALLOYS BY THE ELECTRON BEAM SURFACE MODIFICATION
Ivana Ilievska1, Dimitar Dechev¹, Nikolay Ivanov¹, Angel Anchev²,
Fatme Padikova^1,2, Stefan Valkov^1,2
1 Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria
2 Technical University Gabrovo, Gabrovo, Bulgaria
3 Center of Competence “Smart Mechatronic, Eco- and Energy-Saving Systems and Technologies”, Bulgaria

STRUCTURE FORMATION OF COMPOSITE COATINGS BY ELECTRON BEAM MODIFICATION
Fatme Padikova
Technical University of Gabrovo, Gabrovo, Bulgaria

 ELECTRON BEAM TECHNIQUES FOR THE FABRICATION
OF Ti-Ta COATINGS
Lyubomira Veleva^1,2, Reneta Velizarova¹, Stefan Valkov^2,3,4
1 Department of Natural Sciences, University of Shumen Konstantin Preslavsky, Shumen, Bulgaria
2 Institute of Electronics, Bulgarian Academy of Sciences, Sofia, Bulgaria
3 Technical University of Gabrovo, Gabrovo, Bulgaria
4 Center of Competence “Smart Mechatronic, Eco-and Energy-Saving Systems and Technologies”, Gabrovo, Bulgaria

APPLICATION AND ANALYSIS OF ULTRASONIC SENSORS FOR RIVER LEVEL MEASUREMENT
Svetoslav Mateev¹, Dobromira Yaneva², Dragomir Vassilev²
1 Senstate Technologies JSC, 14 Stantsionna Str, Gabrovo, Bulgaria
2 Technical University of Gabrovo, Gabrovo, Bulgaria

IMPLEMENTATION AND ANALYSIS OF AN RFID-BASED “PAY-AS-YOU-THROW” SYSTEM FOR SMART WASTE MANAGEMENT
Svetoslav Mateev¹, Dobromira Yaneva², Dragomir Vassilev²
1 Senstate Technologies JSC, 14 Stantsionna Str, Gabrovo, Bulgaria
2 Technical University of Gabrovo, Gabrovo, Bulgaria

SYNTHESIS, STRUCTURE, AND ELECTRICAL PROPERTIES OF TIO2 FILMS DEPOSITED BY PVD
Daniela Stoeva¹, Georgi Kotlarski¹,Dimitar Dechev¹, Nikolay Ivanov¹,
Maria Ormanova^1,2,Stefan Valkov^1,2, Valentin Mateev³, Iliana Marinova⁴
1 Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria
2 Faculty of Mathematics, Informatics, and Natural Sciences, Technical University of Gabrovo, 4 H Dimitar Str., 5300 Gabrovo, Bulgaria
3 Faculty of Electrical Engineering, Technical University of Sofia, 8 Kliment Ohridski blvd., 1000 Sofia, Bulgaria
4 Institute of Robotics, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., 1113 Sofia, Bulgaria