2021 INTERNATIONAL SCIENTIFIC CONFERENCE - TECHNICAL UNIVERSITY OF GABROVO - INTERNATIONAL ...
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TECHNICAL UNIVERSITY OF GABROVO
INTERNATIONAL
SCIENTIFIC CONFERENCE
2021
PROGRAM
19 - 20 NOVEMBER 2021
GABROVO
International Scientific Conference “UNITECH 2021” – GabrovoInternational Scientific Conference UNITECH’21 is organized by the Technical University of
Gabrovo with the assistance of regional business establishments and companies. The conference is a
forum at which traditionally every year at the end of November lecturers and research workers from
home and abroad meet to promote the Development of Science and Education.
ORGANIZING COMMITTEE
Chairman: Assoc. Prof. Plamen Tsankov, PhD
Vice Rector in charge of Research and Development
Members: Prof. Jordan Maximov, DSc
Prof. Anatoliy Aleksandrov, PhD
Assoc. Prof. Lilyana Rusanova, PhD
Technical Assistant:
Petya Peneva, MA
PROGRAM COMMITTEE
Chairman: Prof. Iliya Zhelezarov, PhD
Technical University of Gabrovo, Bulgaria
Members:
Acad. Chavdar Rumenin, Bulgaria
Acad. Dragoljub Mirjanić, Rep. Srpska, B&H
Acad. Peter Kralchevski, Bulgaria
Acad. Tomislav Pavlović, Serbia
Acad. Dimitar Dimitrov, Bulgaria
Corr. Mem. Prof. Tony Spassov, Bulgaria
Prof. DHC Yuriy Kuznetsov, DSc, Ukraine
Prof. DHC Nikolay Ganev, PhD, Czech Republic
Prof. DHC Helmut Hopp, PhD, Germany
Prof. Lothar Otto, PhD, Germany
Prof. Emil Kolev, PhD, Germany
Prof. Ludwig Hilmer, PhD, Germany
Prof. Elena Kovalenko, PhD, Ukraine
Prof. Iurii Iaremchuk, DSc, Ukraine
Prof. Mikhail Prokofiev, PhD, Ukraine
Prof. Igor Sazonov, DSc, Belarus
Prof. Ivan Yachev, DSc, Bulgaria
Prof. Vasil Kavardjikov, DSc, Bulgaria
Prof. Raycho Ilarionov, DSc, Bulgaria
Prof. Galya Duncheva, DSc, Bulgaria
Prof. Irina Aleksandrova, PhD, Bulgaria
Prof. Zvezditsa Nenova, PhD, Bulgaria
Prof. Nikolay Madzharov, PhD, Bulgaria
Prof. Dimitar Dichev, DSc, Bulgaria
Prof. Toshko Nenov, PhD, Bulgaria
Assoc. Prof. Rosen Ivanov, PhD, Bulgaria
Assoc. Prof. Angel Anchev, PhD, Bulgaria
Assoc. Prof. Stanimir Sadinov, PhD, Bulgaria
UNITECH’21 will be held on 19 and 20 November 2021
at the Technical University of Gabrovо
International Scientific Conference “UNITECH 2021” – GabrovoWORKING PROGRAM
OF THE SCIENTIFIC CONFERENCE
18th November 2021, Thursday
14.00 – 17.00 h Registration, Rectorat building
19th November 2021, Friday
08.00 – 10.30 h Registration, Rectorat building
10.30 – 11.00 h Opening ceremony – Gabrovo Tech Park, Conference hall
11.00 – 12.00 h "Aerogels – new materials with promising applications",
Stoyan Gutzov, Dimitar Shandurkov, Nina Danchova
Sofia University “St. Kliment Ohridski”, Faculty of Chemistry
and Pharmacy, Department of Physical
12.00 – 13.00 h Lunch
13.00 – 18.00 h Thematic sessions
➢ Electrical Engineering
➢ Electronics and Sensors
➢ Automation
➢ Chemistry and Ecology
➢ Communication Engineering and Technologies
➢ Computer Systems
➢ Computer Technologies
➢ Information Security
➢ Mathematics and Informatics
➢ Design of Machines and Instruments
➢ Technologies in Mechanical Engineering
➢ Technologies in Textile Production
➢ Mechatronics, Metrology and Quality Management
➢ Hydraulics, Pneumatics and Heat Engineering
➢ Еntrepreneurship and Еconomy
➢ Organization and Management
➢ Social Sciences and Humanities
➢ Educational Technologies
➢ Physics
14.00 Round Table UNESCO Project, Gabrovo Tech Park,
Conference hall
15.00 Coffee break
16.00 – 17.00 h Information day Project BG05М20Р001-1.002-0023 Centre of
Competence “Smart Mechatronic, Eco- and Energy Saving Systems
and Technologies", (SMEEST), Gabrovo Tech Park, Conference
hall
19.00 h Formal dinner Restaurant Balkan Hotel
20th November 2021, Saturday
09.00 – 12.00 h Thematic sessions
International Scientific Conference “UNITECH 2021” – GabrovoTHEMATIC SESSIONS
ELECTRICAL ENGINEERING
Chairmen: Assoc. Prof. Hristo Ibrishimov, PhD, Sen. Assist. Emil Stanev, PhD
Building № 2A, Hall 2603
Beginning: 13.00 h.
ANALYSIS OF THE VARIATIONS OF ELECTRICAL QUANTITIES DURING
THE OPERATION OF AN ROPE ELECTRIC HOIST
Lyubomir Dimitrov, Dimitrina Koeva, Dimitаr Slavov
Technical University of Gabrovo, Bulgaria
SOLAR RADIATION ATLAS IN NORTHERN PART OF THE REPUBLIC OF
SRPSKA
Ivana S. Radonjić1, Tomislav M. Pavlović1, Dragoljub Lj. Mirjanić2, Galina I. Sazhko3
1
University of Niš, Faculty of Sciences and Mathematics, Department of Physics, Višegradska 33, 18000
Niš, Serbia
2
Academy of Sciences and Arts of the Republic of Srpska, Bana Lazarevića 1, 78000 Banja Luka, Republic
of Srpska
3
Ukrainian engineering pedagogics academy, Kharkov, Ukraine
POWER SWITCHES STRESS ON A RESONANT CONVERTER AT A VARIABLE
FREQUENCY CONTROL
Angel Lichev
University of Food Technologies – Plovdiv, Bulgaria
LED LIGHTING TECHNOLOGIES FOR DISINFECTION OF THE HUMAN
ENVIRONMENT
Pylyp Hovorov1, Anastasiia Kindinova1, Iryna Ivankova1, Kateryna Hovorova1
1
O.M. Beketov National University of Urban Economy in Kharkiv
ANN APPROACH FOR MAGNETIC GEAR DESIGN OPTIMIZATION
Miglenna Todorova1, Iliana Marinova1, Valentin Mateev1
1
Technical University of Sofia, Department of Electrical Apparatus, Sofia 1156, Bulgaria
MACHINE LEARNING APPROACH FOR ELECTRIC ARC DISCHARGE
PARAMETERS ESTIMATION
Valentin Mateev1, Martin Ralchev1, Iliana Marinova1
1
Technical University of Sofia, Department of Electrical Apparatus, Sofia 1156, Bulgaria
RESEARCH BREAK TIME OF RESIDUAL CURRENT DEVICE
Tsvyatko Kolev Varbov
Technical University of Gabrovo, Bulgaria
COMPARISON OF SOME PARAMETERS OF ELECTROMAGNETIC
COMPATIBILITY OF DIMERS
Tsvyatko Kolev Varbov, Krasimir Marinov Ivanov
Technical University of Gabrovo, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoMEASUREMENTS OF THE PARAMETERS OF PARTIAL DISCHARGES OF
MEDIUM VOLTAGE MOTORS
Panayot Ivanov Yankov, Krasimir Marinov Ivanov
Technical University of Gabrovo, Bulgaria
INDUCED VOLTAGES FROM ELECTRIC LINES OF RAILWAY TRANSPORT
Krasimir Marinov Ivanov, Petar Kolev Petrov, Tsvyatko Kolev Varbov, Georgi Conev Velev
Technical University of Gabrovo, Bulgaria
INVESTIGATION THE EFFECTS OF COMPENSATION OF REACTIVE LOADS
IN NONLINEAR REGIMES ON THE RELIABILITY OF ELECTRICITY
Iliev I.H.1, Panchev H.I.2, Todorov V.V.3
1
University of Mining and Geology, Department of Electric Power Supply and Electrical Equipment
2
Technical University of Varna, Department of Electric Power Supply and Electrical Equipment
3
University of Mining and Geology, Department of Electric Power Supply and Electrical Equipment
RELIABILITY STUDY OF MEDIUM VOLTAGE GRIDS IN CASE OF POOR
POWER QUALITY
Iliev I.H.1, Panchev H.I.2, Todorov V.V.3
1
Sofia University of Mining and Geology, Department of Electrification of Mining Production,
2
Technical University of Varna, Department of Electric Power Supply and Electrical Equipment,
3
Sofia University of Mining and Geology, Department of Electrification of Mining Production
АPPLICATION OF METHODOLOGY FOR CURRENT SIGNATURE ANALYSIS
FOR DIAGNOSIS OF SHIP POWER PLANTS
Yulian Yordanov, Milen Duganov, Plamen Parushev, Valentin Gyurov
Technical University of Varna, Bulgaria
PRACTICAL APPROACH FOR DETERMINATION OF POWER
TRANSFORMERS PARAMETERS IN SIMULATIONS MODELS OF SHIPBOARD
ELECTRICAL SYSTEMS
Milen Duganov, Plamen Parushev, Valentin Gyurov
Technical University of Varna, Department of Electric Power Supply and Equipment
RESEARCH AND ANALYSIS OF INDUCED VOLTAGES FROM URBAN
ELECTRIC TRANSPORT
P. K. Petrov, Kr. M. Ivanov, G. Ts. Velev, Ts. K. Varbov
Technical University of Gabrovo, Bulgaria
MATHEMATICAL MODELS FOR DETERMINING THE CONSUMED AND
GENERATED REACTIVE POWER FROM ELEMENTS OF THE POWER
SUPPLY SYSTEMS OF INDUSTRIAL SITES
E. R. Kartselin1, G. Ts. Velev2, N. S. Minekov3, Ts. K. Varbov2, R. A. Alexandrov1
1
University of Mining and Geology “St. Ivan Rilski” – Sofia, Bulgaria
2
Technical University of Gabrovo, Bulgaria
3
Assarel-Medet JSC, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoELECTRONICS AND SENSORS TECHNICS
Chairmen: Prof. Nikolay Madzharov, PhD, Assoc. Prof. Prodan Prodanov, PhD
Building № 2, Hall 2311
Beginning: 13.00 h.
GENERALIZATION OF A NEW THEORY OF FIR DIGITAL FILTERS
INTENDED FOR IMPULSE SIGNALS
Perišić Đurđe1, Miroslav Bojović2, Željko Gavrić1, Vanja Mišković1
1
Faculty of Information Technology, Slobomir P University, Slobomir, BiH
2
School of Electrical Engineering, University of Belgrade, Beograd, Serbia
INFINITE IMPULSE RESPONSE DIGITAL FILTER FOR PULSE SIGNAL
PERIODS
Perišić Đurđe1, Miroslav Bojović2
1
Faculty of Information Technology, Slobomir P University, Slobomir, BiH
2
School of Electrical Engineering, University of Belgrade, Beograd, Serbia
COMPUTER ANALYSIS OF MAGNETIC FLUX DISTRIBUTION IN WIRELESS
POWER TRANSFER SYSTEMS
Desislav Iliev1, Nikolay Madzharov2
1
Technical University of Gabrovo, Bulgaria
IMPROVED PERTURB AND OBSERVE MAXIMUM POWER POINT TRACKING
METHOD WITH THERMOELECTRIC GENERATOR MODEL
Hayati Mamur1, Mehmet Ali Üstüner2
1,2
Manisa Celal Bayar University, Department of Electrical and Electronics Engineering, Manisa, Turkey
SIMULINK MODEL OF SEEBECK THERMOELECTRIC MODULE FOR POWER
GENERATION
Hayati Mamur1, Mehmet Ali Üstüner2
1,2
Manisa Celal Bayar University, Department of Electrical and Electronics Engineering, Manisa, Turkey
ALGORITHM OF CONTROL OF TWO-PHASE INTERLEAVED DC - DC
CONVERTER WITH ADDITIONAL MEASURING SYSTEM
Evgeni Malev1
1
Technical University of Varna, Bulgaria
CONTROL OF AN INVERTER WITH SIC TRANSISTORS FOR INDUCTION
HEATING
Dobroslav Dankov, Petko Marinov
Technical University of Gabrovo, Department of Electronics, Bulgaria
MODEL-BASED OPTIMIZATION OF SERIAL RESONANCE INVERTER WITH
REVERSE DIODES
Nikolay Hinov, Bogdan Gilev, Stoyan Popov
Technical University of Sofia, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoQUASI-DIGITAL CONSTANT DC CURRENT SENSOR
Aleksandar Žorić1, Vladimir Rajović2, Nikola Žorić1
1
Faculty of technical sciences-University of Priština, Serbia
2
School of electrical engineering-University of Belgrade, Serbia
CONTACTLESS DEVICE FOR DETERMINING THE DIRECTION OF
ROTATION
S.V. Lozanova1, M.L. Ralchev1
1
Institute of Robotics at Bulgarian Academy of Sciences “Acad. G. Bonchev” Str., Bl.2, Sofia 1113, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoCOMМUNICATION ENGINEERING AND TECHNOLOGIES
Chairmen: Assoc. Prof. Stanimir Sadinov, PhD, Assoc. Prof. Krasen Angelov, PhD
Building № 2, Hall 2215
Beginning: 13.00 h.
COMPARATIVE ANALYSIS OF LORA MODULATION PERFORMANCE FOR IOT
APPLICATIONS
Plamen Tashev, Krasen Angelov, Nikolay Manchev
Technical University of Gabrovo, Bulgaria
DEVELOPMENT OF RASPBERRY PI-BASED PLATFORM FOR IP TELEPHONY IN A
LOCAL COMPUTER NETWORK
Emil Bonev1, Krasen Angelov1, Hristina Stoycheva1, Constantinos Tramantzas2
1
Technical University of Gabrovo, Bulgaria
2
International Hellenic University, Greece
KPIS IN CHATBOTS COMPARED TO OTHER SOFTWARE
Georgi Georgiev, Oleg Panagiev
Technical University of Sofia, Bulgaria
EMF MEASUREMENT USING MULTI-TURN ROTATION OF THE SCANNING
ANTENNA
Kliment Angelov, Hristo Hristov
Technical University of Sofia, Bulgaria
PREDICTION OF COMMUNICATION TRAFFIC LOAD
BY ARTIFICIAL NEURAL NETWORKS
Ivelina Balabanova, Stanimir Sadinov, Dionisia Daskalaki, Georgi Georgiev
Technical University of Gabrovo, Department of Communications Equipment and Technologies, Bulgaria
BALANCE OF EFFICIENCY AND QUALITY INDICATORS IN RADIO FREQUENCY
AMPLIFIER CLASS F
Miroslav Tomov
Technical University of Gabrovo, Bulgaria
TECHNICS FOR EXACT TIME SERIES PREDICTION WITH NEURAL
NETWORKS
Vasil Shterev, Nikolay Hinov
Technical University of Sofia, Bulgaria
SIMULATION STUDIES OF SATELLITE DIGITAL TELEVISION SIGNAL
ACCORDING TO DVB-S2 STANDARD
Panagiotis Kogias1, Stanimir Sadinov2, Seyhan Myumyunali2, Ana Sindrakovska 2, Boyan
Karapenev2
1
International Hellenic University - Kavala Campus, Greece
2
Technical University of Gabrovo, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoROBUSTNESS OF THE SD WATERMARKING ALGORITHM IN IS MAPPING
USING COMB FILTERING
Bojan Prlinčević1, Zoran Milivojević2
1
Kosovo and Metohija Academy of Applied Studies, Dositejeva bb, 38218 Leposavic, Serbia Organization
2
Academy of Applied Technical and Preschool Studies, Section Niš, A. Medvedeva 20, 18000 Niš, Serbia
ESTIMATION THE FUNDAMENTAL FREQUENCY OF THE SPEECH SIGNAL
USING AUTOCORRELATION ALGORITHM
Zoran Milivojević1, Bojan Prlinčević2, Dijana Kostić 3
1
Academy of Applied Technical and Preschool Studies, Section Niš, A. Medvedeva 20, 18000 Niš, Serbia
2
Kosovo and Metohija Academy of Applied Studies, Dositejeva bb, 38218 Leposavic, Serbia
3
Geonais, Svetozara Markovića 1/L2, 18000 Niš, Serbia
OPTIMIZATION OF THE LANCZOS KERNEL PARAMETER FOR
INTERPOLATION IMAGE
Nataša Savić1, Zoran Milivojević1
1
The Academy of Applied Technical and Preschool Studies, Section Niš, Aleksandra Medvedeva 20, 18000
Niš, Serbia
International Scientific Conference “UNITECH 2021” – GabrovoCOMPUTER SYSTEM, COMPUTER TECHNOLOGIES
AND AUTOMATION
Chairmen: Assoc. Prof. Delyan Genkov, PhD, Assoc. Prof. Dragomir Chantov, PhD
Building № 3, Hall 3311
Beginning: 13.00 h.
COMPARATIVE ANALYSIS OF CONTROL MOMENT GYROSCOPE AND
REACTION WHEEL TORQUE EFFECTS IN BALANCING SYSTEMS
Eray YILMAZLAR1, Hilmi KUŞÇU2, Aydın GÜLLÜ3
1
Kırklareli University, Technical Sciences Vocational School, Kırklareli, Turkey
2
Trakya University, Mechanical Engineering Department, Edirne, Turkey
3
Trakya University Vocational School of Ipsala, Turkey
VOLATILITY INDEX ESTIMATION BY REVERSE ENGINEERING
Todor Balabanov
Bulgarian Academy of Sciences Institute of Information and Communication Technologies
PARETO FRONT ESTIMATION WITH A HEURISTIC SINGLE-OBJECTIVE
SOLVER
Todor Balabanov
Bulgarian Academy of Sciences Institute of Information and Communication Technologies
SIMULATION ENVIRONMENT FOR STUDY OF LORAWAN TECHNOLOGY
Diyan Dinev1, Kaloyan Genov1
1
Technical University of Varna, Bulgaria
MOBILE ROBOT CONTROL USING ROBOT OPERATING SYSTEM
Uroš Pešović1, Marko Marković1, Velibor Trifunović1, Slađana Đurašević1, Željko Jovanović1
1
Faculty of technical sciences Čačak, University of Kragujevac, Serbia
SIMULATION ENVIRONMENT FOR STUDY OF BLUETOOTH LOW ENERGY
TECHNOLOGY
Aydan Haka, Yordan Yordanov
Technical University of Varna, Bulgaria
PHASOR PARTICLE SWARM OPTIMIZATION FOR SOLVING PROBLEM OF
PRICING IN ELECTRICITY MARKET
M. Gajić1, M. Jevtić2, J. Radosavljević2, S. Arsić1, D. Klimenta2
1
Technical Faculty in Bor, University of Belgrade, Bor, Serbia
2
Faculty of Technical Sciences, University of Priština in Kosovska Mitrovica, Kosovska Mitrovica, Serbia
DESIGN AND DEVELOPMENT OF A TEMPERATURE MONITORING SYSTEM
Diyan Dinev, Delcho Angelov
Technical University of Varna, Bulgaria
VIRTUAL ENVIRONMENT FOR REMOTE LABS IN NETWORKING AND
SECURITY RELATED DISCIPLINES
Miroslav Slavov, Delyan Genkov
Department of Computer Systems and Technologies, Technical University of Gabrovo, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoVIRTUAL LABORATORY FOR COMPUTER ORIENTED DISCIPLINES
Delyan Genkov, Miroslav Slavov
Department of Computer Systems and Technologies, Technical University of Gabrovo, Bulgaria
RESEARCH AND ANALYSIS OF ANTI-WINDUP TECHNIQUES IN THE
CONTROL SYSTEMS
Georgi Mihalev, Stanimir Yordanov
Technical University of Gabrovo, Bulgaria
INTRODUCTION AND COMPARISON OF SOFTWARE PLATFORMS FOR
MACHINE LEARNING
Aleksandar Lubenov, Georgi Mihalev
Technical University of Gabrovo, Bulgaria
HUMIDITY SENSOR ELEMENTS BASED ON Ce, Zn AND V-DOPED Ti-Si-O
SURFACE LAYERS
Nedyu Nedev1, Zvezditza Nenova1, Stephan Kozhukharov2, Toshko Nenov1
1
Technical University of Gabrovo, Bulgaria
2
University of Chemical Technology and Metallurgy – Sofia, Bulgaria
SCALED ANTI-SYNCHRONIZATION BETWEEN TWO THIRD-ORDER
CHAOTIC SYSTEMS WITH DOUBLE ATTRACTORS
Dragomir Chantov, Hristina Stoycheva
Technical University of Gabrovo, Bulgaria
LOW-COST SENSOR MODULE FOR GAS MEASUREMENTS
Stefan Ivanov, Todor Todorov, Toshko Nenov
Technical University of Gabrovo, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoTECHNOLOGIES IN MECHANICAL ENGINEERING AND
DESIGN OF MACHINES AND INSTRUMENTS
Chairmen: Prof. Galya Duncheva, DSc, Assoc. Prof. Angel Anchev, PhD
Building № 1, Hall 1114
Beginning: 13.00 h.
THE HEURISTIC ALGORITHMS USED IN THE OPTIMIZATION OF
LAMINATED COMPOSITE STRUCTURES: A REVIEW
Fatih KARAÇAM, İbrahim Batuhan ÇANCI
Trakya University, Department of Mechanical Engineering, 22030, Edirne, Turkey
MATERIALS WITH IMPROVED HEAT-PHYSICAL PROPERTIES FOR
BALLONETS OF HYBRID AIRSHIP
Pavlyk Petro 1, Salenko A.2, Chencheva O.3 Shchetynin V.4
1
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
2
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
3
Kremenchug Mykhailo Ostrogradskyi National University
4
Kremenchug Mykhailo Ostrogradskyi National University
INCREASING THE RESOURCE OF PLASTICITY OF ALUMINUM ALLOY
AMG6 BY THERMOMECHANICAL TREATMENT UNDER UNIAXIAL TENSION
CONDITIONS
V.A. Titov, V.O. Koreva
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"
STUDY OF THE KINEMATICS OF THE MOVEMENT OF SOLID INCLUSION IN
PLASTIC FLOW
Vyacheslav Titov1, Nataliia Zlochevska1, Anton Lavrinenkov, Veronika Skrypnikova1,
Dmytro Korotin1
1
National technical University of Ukraine" Igor Sikorsky Kiev Polytechnic Institute"
INFLUENCE OF THE PRESSING FORCE ON THE MECHANICAL
CHARACTERISTICS OF AN IRON MATRIX OF WATER- DISPERSED
POWDERS ALLOYED WITH NICKEL
Ivanka Miteva, Ivan Mitev
Technical University of Gabrovo, Bulgaria
FORMATION OF INTERNAL THREADS WITH TAPS
Hristo Radev
Technical University of Gabrovo, Bulgaria
SELECTION OF FILTER PARTITION MATERIAL FOR ULTRASONIC
CAVITATION FILTRATION
Andrii Zilinskyi
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
International Scientific Conference “UNITECH 2021” – GabrovoAN INVESTIGATION ABOUT THE EFFECT OF LOAD ON DRY SLIDING WEAR
PERFORMANCE OF AA7075-T6
Mehmet CEVİZ1, Cenk MISIRLI2, Sencer Süreyya KARABEYOĞLU3
1
Trakya University, Vocational School of Keşan, Edirne, Turkey
2
Trakya University, Mechanical Engineering Department, Edirne, Turkey
3
Kırklareli University, Mechanical Engineering Department, Kırklareli, Turkey
A STUDY ON THE PREVENTION OF SURFACE DEFECTS CAUSED BY
LUBRICATION IN PRODUCT PRODUCTION FROM ZAMAK 3 BY INJECTION
METHOD
Cenk MISIRLI1, Mehmet CEVİZ2, Işık ÇETİNTAV3, Benhur ERSOY4
1
Trakya University, Mechanical Engineering Department, Edirne, Turkey
2
Trakya University, Vocational School of Keşan, Edirne, Turkey
3
Trakya University, Mechanical Engineering Department, Edirne, Turkey
4
Trakya University, Mechanical Engineering Department, Edirne, Turkey
STUDY ON THE INFLUENCE OF THE TECHNOLOGICAL PARAMETERS
OVER THE CORROSION BEHAVIOR AND SURFACE CHARACTERIZATION
OF Ti-6Al-4V AND Ti-6Al-7Nb ALLOYS AFTER PLASMA GAS NITRIDING
Hristo Skulev1, Deyan Veselinov1
1
Institute of Metal Science, Equipment and Technologies with Hydro- and Aerodynamics Centre
“Acad. A. Balevski”, Bulgarian Academy of Sciences, Bulgaria
THE INFLUENCE OF VOLTAGE AND ANODE JACKETS ON THE
MICROSTRUCTURE, MICROROUGHNESS AND MICROHARDNESS OF
COBALT COATINGS DEPOSITED ON Ti-6Al-4V USING BRUSH PLATING
Deyan Veselinov
Institute of Metal Science, Equipment and Technologies with Hydro- and Aerodynamics Centre “Acad. A.
Balevski”, Bulgarian Academy of Sciences, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoHYDRAULICS, PNEUMATICS AND HEAT ENGINEERING AND
MECHATRONICS, METROLOGY AND QUALITY
MANAGEMENT
Chairmen: Assoc. Prof. Hristo Hristov, PhD, Assoc. Prof. Dimcho Pulov, PhD
Building № 1, Hall 1300
Beginning: 13.00 h.
GENERAL ANALYSIS OF SCHEME FOR ELECTROHYDRAULIC
POSITIONING ACTUATORS
Li Qiang, Uzunov Oleksandr
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Ukraine
METHODS FOR INTENSIFICATION OF THE TRANSFER PHENOMENON IN
THE CHEMICAL TECHNOLOGICAL PROCESS OF ELECTROLYSIS
Nochnichenko Ihor, Jakhno Oleg
National technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Ukraine
RHEOLOGICAL PROPERTIES OF FOAMING AGENTS USED BY
UKRAINIAN FIREFIGHTERS
Stas S. V.¹, Kolesnikov D. V.¹, Bychenko A. O.¹, Koval O. D.²
¹Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of
Ukraine
²National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
FEATURES OF THE IMPACT OF HYDRODYNAMIC AND ULTRASONIC
CAVITATION ON TECHNOLOGICAL PROCESSES
Jarosław Stryczek1, Oleksandr Luhovskyi2, Oleg Jakhno2 Dmytro Kostiuk2
Alona Murashchenko2
1
Wrocław University of Science and Technology
2
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
ANALYSIS OF NET ENERGY CONSUMPTION FOR COOLING HOTEL
BUILDINGS
Mariya Raykova, Ivaylo Tsvyatkov
Technical University of Gabrovo, Bulgaria
OPTIMIZATION OF THE PARAMETERS OF THE ENCLOSING ELEMENTS OF
BUILDINGS IN HEATING AND COOLING MODE
Mariya Raykova, Ivaylo Tsvyatkov
Technical University of Gabrovo, Bulgaria
RESEARCH OF THE PHENOMENON OF HYDRODYNAMIC LUMINESCENCE IN A
TWO-PHASE ENVIRONMENT
Vladyslav Kryvosheiev, Ihor Nochnichenko, Ihor Liberatskyi
National Technical University of Ukraine, Kyiv Polytechnic Institute named after Igor Sikorski, Kyiv,
Ukraine
International Scientific Conference “UNITECH 2021” – GabrovoCOMMUTATION-MODULATION METHOD AND MEANS OF DETERMINING
ACUPUNCTURE POINTS
Konstantyn Shevchenko1, Oleksiy Yanenko1, Mikhail Prokofiev2, Sergey Peregudov1,
Vasyl Kuz3
1
Igor Sikorsky Kyiv Polytechnic Institute
2
Vasyl Stus Donetsk National University
3
Ternopil Ivan Puluj National Technical University
ANALYSIS OF MEASUREMENT UNCERTAINTY BUDGET FOR ELECTRICAL
POWER QUALITY SIGNAL GENERATOR
Milan Simić, Dragan Živanović, Goran Miljković
University of Niš, Faculty of Electronic Engineering, Serbia
POSSIBILITIES OF INCREASING THE PRODUCTIVITY OF THE ULTRASONIC
ATOMISER
O. Luhovskyi, A. Shulha, A. Zilinskyi, I. Gryshko, A. Movchanuk
Igor Sikorsky Kyiv Polytechnic Institute
International Scientific Conference “UNITECH 2021” – GabrovoSOCIAL SCIENCES AND HUMANITIES, ORGANIZATION AND
MANAGEMENT, EDUCATION TECHNOLOGIES,
ЕNTREPRENEURSHIP AND ЕCONOMY
Chairmen: Assoc. Prof. Svetla Panayotova, PhD, Sen. Assist. Plamen Kolev, PhD
Building № 1, Hall 1201
Beginning: 13.00 h.
INDUSTRY 4.0: ASSESSING THE LEVEL OF ADVANCED DIGITAL
TECHNOLOGIES IN THE EU COUNTRIES USING INTEGRATED ENTROPY–
TOPSIS METHODS
Sanela Arsić, Milena Gajić
University of Belgrade, Technical Faculty in Bor, Bor, Serbia
FEATURES AND FUNCTIONAL EXAMINATION OF COMPARATIVE
ACCOUNTING ANALYSIS IN MACHINE-BUILDING SECTOR ENTERPRISES
REVENUES
Ivan Nikolaev Sabev
Technical University of Gabrovo, Bulgaria
CUSTOMS POLICY AND THE INFLUENCE OF THE INFORMATION TECHNOLOGIES
ON THE IMPLEMENTATION OF BILATERAL AND MULTILATERAL AGREEMENTS
IN THE REPUBLIC OF SERBIA
Bojan Kocić1, Oliver Popović1, Nikola Vasić2
1
Academy of professional studies South Serbia, Leskovac, Serbia
2
Belgrade Business and Arts Academy of Applied Studies, Belgrade, Serbia
ASSESSMENT OF INVESTMENT ATTRACTIVENESS OF SOCIALLY
RESPONSIBLE ENTERPRISES ON THE EXAMPLE OF COMPANIES
OPERATING IN THE BALTIC COUNTRIES
Rima Tamošiūnienė 1, Nomeda Dobrovolskienė2, Mindaugas Vaidila3
1,2,3
Vilnius Gediminas Technical University, Financial Engineering Department, Lithuania
AN APPROACH TO MANAGEMENT DECISION-ТАKING
THROUGH A SIMULATION MODEL OF A COMPANY SYSTEM
Daniela Dragneva Dimova
Technical University of Gabrovo, Bulgaria
MANAGEMENT OF EQUIPMENT MAINTENANCE SYSTEMS
Petko Naydenov
Technical University of Gabrovo, Bulgaria
APPROACH FOR SECURE PRODUCTION SUPPLIES
Petko Naydenov
Technical University of Gabrovo, Bulgaria
ANALYSIS OF THE INTENSIVE USE OF HUMAN RESOURCES
Tsanka Zlateva-Petkova
Technical University of Gabrovo, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoUTILIZATION AND EMPLOYMENT OF HUMAN RESOURCES
IN THE ORGANIZATION
Tsanka Zlateva-Petkova
Technical University of Gabrovo, Bulgaria
CUSTOMER JOURNEY MANAGEMENT IN INDUSTRIAL PURCHASE
Veryana Boeva
Technical University of Gabrovo, Bulgaria
BULGARIAN PRESENCE IN THE UKRAINIAN STATE
Lesya Horenko1, Ruslan Zelinskyi2, Volodymyr Lazarenko3
1
PhD, Associate Professor of the Department of Social Sciences of the Cherkasy Institute of Fire Safety
named after Chernobyl Heroes of Ukrainian University of civil Protection
2
Member of the National Union of Local Historians of Ukraine
3
Head of the Department of Ukrainian Studies of the municipal higher educational institution "Vinnytsia
Academy of Continuing Education"
THOMAS HOBBES'S SOCIAL CONTRACT THEORY AS AN IMPORTANT
PRINCIPLE OF MODERN POLITICAL ANTHROPOLOGY
Usov Dmytro
Cherkasy Institute of Fire Safety named after Chornobyl Heroes of the National University of Civil
Protection of Ukraine
SOCIO-ECONOMIC CONSEQUENCES OF COVID-19. IN FOCUS: SMES AND
GOVERNMENT SUPPORT IN EU-27
Ventsislava Aleksandrova Nikolova-Minkova
Technical University of Gabrovo, Bulgaria
CURRENT STATE AND PROSPECTS OF MODERNIZATION OF THE
EDUCATIONAL PROCESS IN VOCATIONAL COLLEGES OF UKRAINE
Yuliia Lastovets 1, Valentina Ovod 1, Natalia Zagorulko 2
1
Kyiv Electromechanical Professional College
2
Optical-Mechanical Professional College of Taras Shevchenko Kyiv National University
THE EFFECTS OF ART THERAPY ON HEALTH
Svetla Boyanova Panayotova
Technical University of Gabrovo, Bulgaria
EMPATHY AND RELATED MECHANISMS
Svetla Boyanova Panayotova
Technical University of Gabrovo, Bulgaria
COVID-19 – SOCIO-ECONOMIC IMPACTS OF THE PANDEMIC CRISIS
Ivanka Stoyanova - Todorova
Technical University of Gabrovo, Bulgaria
CURRICULUM FOR UPSKILLING TECHNICIANS AND ENGINEERS IN THE
SECTOR OF MACHINE BUILDING AND MECHATRONICS
Tsvetelina Petrova, Irena Rashkova
Technical University of Gabrovo, Bulgaria
International Scientific Conference “UNITECH 2021” – GabrovoREMOTE ENGINEERING LABORATORY EXPERIMENTS FOR DISTANCE
LEARNING CONCEPTS IN COVID-19 CONDITIONS
Đorđe Damnjanović, Dejan Vujičić, Marina Milošević, Dijana Stojić
Faculty of Technical Sciences Čačak, University of Kragujevac, Serbia
International Scientific Conference “UNITECH 2021” – GabrovoCHEMISTRY, PHYSICS
AND ECOLOGY
Chairmen: Assoc. Prof. Dragomir Vasilev, PhD, Sen. Assist. Daniela Nedeva, PhD
Building № 1, Hall 1314
Beginning: 13.00 h.
ESTERIFICATION OF ISOPROPYL ALCOHOL WITH HIGH FATTY ACIDS
IN THE ULTRASONIC FIELD
Dragomir Vasilev1, Nadezhda Petkova2, Milena Koleva1, Panteley Denev2
1
Technical University of Gabrovo, Department of Mathematics, Informatics and Natural Sciences
2
University of Food Technologies, Plovdiv, Department of Organic and Inorganic Chemistry
APPLICATION OF CARBOHYDRATE ESTERS AS CO-PLASTICIZERS
AND BIODEGRADABLE ADDITIVES IN PLASTICS
Dragomir Vassilev1, Nadezhda Petkova2, Milka Atanasova3, Milena Koleva1, Panteley Denev2
1
Technical University of Gabrovo, Department of Mathematics, Informatics and Natural Sciences
2
University of Food Technologies, Plovdiv, Department of Organic and Inorganic Chemistry
3
Technical University of Gabrovo, Department of Materials Science and Mechanics of Materials
ENVIRONMENTAL IMPACT ASSESSMENT FROM THE DECOMMISSIONING
OF UNITS 1 TO 4 OF KOZLODUY NPP
Pencho Stoychev
Technical University of Gabrovo, Bulgaria
NEW TECHNOLOGIES FOR RADIOACTIVE WASTE MANAGEMENT
Pencho Stoychev
Technical University of Gabrovo, Bulgaria
SURFACE EFFECTS OF PLATINUM NANOWIRE UNDER UNIAXIAL TENSILE
LOADING: A MOLECULAR DYNAMICS SIMULATION STUDY
Vildan GUDER
Department of Physics, Faculty of Science, Trakya University, 22030 Edirne, Turkey
INVESTIGATION OF FIRST ORDER PHASE TRANSITION PROCESS OF
STRONIUM DURING HEATING WITH MOLECULAR DYNAMICS
SIMULATIONS USING DIFFERENT POTENTIALS
Murat Celtek1, Unal Domekeli2, Sedat Sengul2
1
Faculty of Education, Trakya University, 22030, Edirne – Turkey
2
Dept. of Physics, Trakya University, 22030, Edirne – Turkey
A MOLECULAR DYNAMICS SIMULATION STUDY ON THE STRUCTURAL
EVOLUTION OF LIQUID CALCIUM UNDER HIGH PRESSURE
Murat Celtek1, Sedat Sengul2, Unal Domekeli2
1
Faculty of Education, Trakya University, 22030, Edirne – Turkey
2
Dept. of Physics, Trakya University, 22030, Edirne – Turkey
International Scientific Conference “UNITECH 2021” – GabrovoCOMPARATIVE NEUTRON DIFFRACTION STUDY OF RESIDUAL STRESSES,
ARISING AFTER ELECTRON BEAM WELDING OF VARIOUS STEELS
Darina Kaisheva1,2, Gizo Bokuchava3, Igor Papushkin3, Stefan Valkov1, Maria Ormanova1,
Peter Petrov1
1
Institute of Electronics „Akad. E. Djakov“, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd,
1784 Sofia, Bulgaria
2
South-West University „Neofit Rilski“, 66 Ivan Michailov Str., 2700 Blagoevgrad, Bulgaria
3
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie str., 141980
Dubna, Russia
THE ROLE OF SELF-PREPARATION ON PHYSICS IN PART-TIME
EDUCATION AT TECHNICAL UNIVERSITIES
Daniela Nedeva, Nikolay Angelov, Valentina Todorova – Lazarova
Technical University of Gabrovo, Bulgaria
EFFECT OF COOLING RATE ON THE ATOMIC STRUCTURE OF Al75Co25
METALLIC GLASS
Sedat Sengul1, Unal Domekeli1, Murat Celtek2,
1
Dept. of Physics, Trakya University, 22030, Edirne – Turkey
2
Faculty of Education, Trakya University, 22030, Edirne – Turkey
A MOLECULAR DYNAMICS SIMULATION STUDY OF THE SHAPE EFFECTS
ON THE THERMAL STABILITY OF RHODIUM NANOPARTICLES
Unal DOMEKELI1, Sedat SENGUL1 and Murat CELTEK2
1
Department of Physics, Faculty of Science, University of Trakya, 22030, Edirne, Turkey
2
Faculty of Education, University of Trakya, 22030, Edirne, Turkey
CRYSTALLOGRAPHY OF COOPER OXIDE COATINGS DEPOSITED ON SI
SUBSTRATE BY REACTIVE MAGNETRON SPUTTERING
Maria Ormanova, Georgi Kotlarski, Dimitar Dechev, Stefan Valkov, Nikolai Ivanov, Peter
Petrov
Institute of Electronics „Akad. E. Djakov“, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd,
1784 Sofia, Bulgaria
ALLELOPATHIC ACTIVITY AND CONTENT OF RADIONUCLIDES OF
NETTLE (URTICA DIOICA L.)
Zheni Dimitrova, Seniha Salim, Hristo Hristov, Nina Arhangelova
Shumen University “Konstantin Preslavsky”, Bulgaria
CONTENT OF RADIONUCLIDES OF ORDINARY SHEPHERD'S PURSE
(CAPSELLA BURSA-PASTORIS L.)
Nina Arhangelova1, Seniha Salim1, Hristo Hristov1, Daniela Nedeva2, Zheni Dimitrova1
1
Shumen University “Konstantin Preslavsky”, Bulgaria
2
Technical university of Gabrovo, Bulgaria
EFFECT OF EXTERNAL PRESSURE ON THE MELTING POINT AND ATOMIC
STURUCTURE OF PURE ALUMINUM DURING THE HEATING PROCESS
Unal Domekeli1, Murat Celtek2, Sedat Sengul1
1
Dept. of Physics, Trakya University, 22030, Edirne – Turkey
2
Faculty of Education, Trakya University, 22030, Edirne – Turkey
International Scientific Conference “UNITECH 2021” – GabrovoTHE STRUCTURAL PROPERTIES OF LIQUID MOLYBDENUM UNDER HIGH
PRESSURE: MOLECULAR DYNAMICS SIMULATIONS STUDY
Sedat SENGUL1, Murat CELTEK2 , Unal DOMEKELI1
1
Department of Physics, Faculty of Science, University of Trakya, 22030, Edirne, Turkey
2
Faculty of Education, University of Trakya, 22030, Edirne, Turkey
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