Vol. 3 (2024): Environment. Technology. Resources. Proceedings of the 15th International Scientific and Practical Conference. Volume 3

View Vol. 3 (2024): Environment. Technology. Resources. Proceedings of the 15th International Scientific and Practical Conference. Volume 3

Published: 2024-06-27

Full Issue

Engineering Sciences and Production Technologies

A CASE STUDY OF SIMULATING VARIOUS NUMBER OF GATE POSITIONS AND THEIR IMPACT THROUGH T-RTM TECHNOLOGY

Blagovest Bankov

15-19
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A MULTI-STEP APPROACH FOR ANALYZING THE NUMBER OF POLYMER INJECTION MOLDING GATE SPOTS AND THEIR POSITION IN T-RTM TECHNOLOGY

Blagovest Bankov, Todor Todorov, Yavor Sofronov, Ivan Ivanov

20-23
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TWO GENERALIZATIONS OF SKEW-SYMMETRIC SEQUENCES WITH ODD LENGTHS

Borislav Bedzhev, Dilyan Dimitrov

24-28
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MISMATCHED FILTERS FOR PROCESSING OF PHASE MANIPULATED SIGNALS WITH THREE-VALUED AUTOCORRELATION

Borislav Bedzhev, Dilyan Dimitrov

29-33
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DEVELOPMENT OF ORGANISATIONAL COMPETENCIES DURING TRANSITION AND ADAPTATION TO INDUSTRY 4.0.

Iryna Bohashko, Oleksandr Bohashko

34-38
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INVESTIGATION OF THE INFLUENCE OF DIFFERENT MODIFIERS ON THE CORROSION RATE OF ALSI18CU3CRMN ALLOY

Desislava Dimova, Boyan Dochev, Kalina Kamarska, Yavor Boychev, Bozhana Chuchulska

39-42
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OPTIMIZATION OF A TECHNOLOGICAL PROCESS FOR HEAT TREATMENT OF CU99.9 WITH DIFFERENT DEGREES OF PLASTIC DEFORMATION

Desislava Dimova, Boyan Dochev, Yavor Boychev

43-47
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INVESTIGATION OF THE INFLUENCE OF ARTIFICIAL AGING PARAMETERS ON THE MICRO AND MACRO HARDNESS OF ALSI12CU5MGCR AND ALSI12CU5MN ALLOYS

Boyan Dochev, Desislava Dimova, Mihail Zagorski, Plamen Kasabov, Bozhana Chuchulska

48-52
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INVESTIGATION OF THE INFLUENCE OF THE MANUFACTURING PROCESS ON THE STRUCTURE OF HYPEREUTECTIC ALUMINIUM-SILICON ALLOYS

Boyan Dochev, Desislava Dimova, Mihail Zagorski, Plamen Kasabov, Bozhana Chuchulska

53-57
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COMPARATIVE ANALYSIS OF THE RESULTSOF AN EXPERIMENTAL STUDY WITH BASIC EQUIPMENT AND A SPECIALLY MADE ONE TOTHE INSIZE ISR - C002 ROUGHNESS TESTER

Kliment Georgiev, Pavlina Katsarova

58-64
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INVESTIGATING THE REPEATABILITY OF 3D PRINTERS USING A MULTI-SENSOR MEASUREMENT SYSTEM

Borislav Georgiev, Tsanko Karadzhov

65-69
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STATISTICAL ANALYSIS OF THE QUALITY OF A TECHNOLOGICAL PROCESS FOR THE PRODUCTION OF SHAFTS FOR ELECTRIC MOTORS BY ROUGHNESS STUDY

Kliment Georgiev

70-74
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THE FLUID FLOW SIMULATION OF THE THERMAL COMFORT IN THEATRE

Lyuba Gyurova

75-78
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NUMERICAL SIMULATION AND ANALYSIS OF TWO-DIMENSIONAL STEADY-STATE HEAT CONDUCTION IN 2D RECTANGULAR DOMAIN

Lyuba Gyurova

79-83
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TASK-ORIENTED TEMPERATURE COMPENSATION AS AN INSTRUMENT FOR REDUCTION OF UNCERTAINTY IN SHOP FLOOR CMM

Miroslav Hristov

84-89
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EXPERIMENTAL STUDY OF THE FREQUENCY RESPONSES OF ELECTROPNEUMATIC POSITIONING SYSTEM

Georgi Iliev

90-94
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SPEED CONTROL OF PNEUMATIC CYLINDERS USING HIGH SPEED 2 PORT ON/OFF VALVES WITH PULSE WIDTH MODULATION

Georgi Iliev, Hristo Hristov

95-100
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DESIGN AND IMPLEMENTATION OF SOFTWARE-DEFINED PI/4-DQPSK MODEM WITH RECEIVE ANTENNA DIVERSITY

Ivan Ivanov, Mario Angelov

101-104
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DESIGN AND IMPLEMENTATION OF SOFTWARE-DEFINED DOPPLER RADAR

Ivan Ivanov, Karmen Aleksandrova

105-108
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STUDY OF AN ANTHOCYANINS AS A CORROSION INHIBITOR FOR ALUMINUM ALLOY EN AW-2024 IN ACIDIC MEDIA

Kalina Kamarska, Iva Naydenova, Ivalina Petrova, Georgi Dobrev

109-113
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STATE OF THE ART AND LITERATURE REVIEW RESEARCH OF HOLLOW NANOFIBERS: FOCUSING ON FABRICATION, CAD IMPLEMENTATION AND OPTIMISATION

Sai Pavan Kanukuntla

114-122
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INVESTIGATION ON PHASE COMPOSITION AND MICROSTRUCTURE OF HIGH CHROMIUM WHITE CAST IRONS ALLOYED WITH BORON

Julieta Kaleicheva, Rumyana Lazarova, Georgi Avdeev, Valentin Mishev, Zdravka Karaguiozova, Krassimir Kirov

123-126
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ASSESSING DAILY INTAKE OF INDOOR AIR POLLUTANTS FROM 3D PRINTING

Ivars Laicāns, Elīza Ķibilda, Krista Žvagiņa, Žanna Martinsone, Ilona Pavlovska

127-132
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INFLUENCE OF SUCCINITE ADDITIVES ON THE CRYSTAL STRUCTURE AND ORIENTATION OF COMPOSITE PA6 NANOFIBERS

Inga Lasenko

133-139
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THERMAL AND STRUCTURAL PROPERTIES OF SUCCINITE REINFORCED PA6 NANOFIBERS

Inga Lasenko

140-146
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LONGITUDINAL STABILITY OF WHEELED MOBILE ROBOTS - DEGREE OF STABILITY

Stoyan Lilov, Vanya Markova, Nickolay Popov, Ventseslav Shopov

147-153
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TECHNOLOGICAL ASSURANCE OF THE MILLING PROCESS OF PRISMATIC CHANNELS IN HEAT EXCHANGE ALUMINUM ALLOYS

Angel Lengerov, Desislava Petrova, Martin Bozhakov

154-157
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IMPROVEMENT OF TECHNOLOGICAL PROCESSES TO REDUCE TOTAL INACCURACY DURING BORING DEEP HOLES

Angel Lengerov, Silviya Salapateva, Georgi Levicharov

158-161
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INVESTIGATION OF THE ЕLASTIC DEFORMATIONS OF THE TECHNOLOGICAL SYSTEM DURING TURNING OF ROTARY SURFACES

Angel Lengerov, Silviya Salapateva, Martin Bojakov

162-165
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DETAILED MICROSTRUCTURAL STUDIES OF AMORPHOUS AL-NI-SI AND AL-NI-SI-CU ALLOYS DURING CRYSTALLIZATION

Yana Mourdjeva, Kateryna Valuiska, Yoanna Kostova, Vanya Dyakova

166-169
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A DIGITALLY MANIPULATED GUNSHOT SOUND IDENTIFICATION

Stoyan Madzharov, Ivan Ivanov, Nayden Yordanov

170-174
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ELECTRIC GENERATOR MODEL RESEARCH (STAGE EFFICIENCY OF ELECTROMECHANICAL PART)

Vaidotas Matutis, Loreta Savulioniene, Tomas Kasperavicius, Dainius Savulionis

175-179
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MECHANO-MATHEMATICAL MODEL AND EXPRIMENTAL RESULTS ON THE EXCITATION OF THE SHIP’S HULL OSCILLATIONS BY THE MARINE PROPELLER

Yuliyan Minchev, Ivaylo Minchev

180-184
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MECHANO-MATHEMATICAL MODEL AND EXPERIMENTAL RESULTS ON THE DYNAMIC RELATION BETWEEN MARINE PROPELLER OSCILLATION AND MAIN SHIP ENGINE

Yuliyan Minchev, Ivaylo Minchev

185-189
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METHODOLOGY AND EXPERIENCE IN APPLYING A NON-DESTRUCTIVE TESTING METHOD BY BARKHAUSEN NOISE ANALYSIS, FOR EXAMPLE, IN ION-TREATED SAMPLES

Velichko Machev, Nikolay Tonchev

190-193
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EVALUATION AND STRATEGY SELECTION IN THE ANTI-CRISIS MANAGEMENT OF THE ENERGY SECTOR INDUSTRY

Marina Marinova-Stoyanova

194-199
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HUMIDITY SENSING ELEMENTS BASED ON SILICA-GRAPHENE SURFACE LAYERS

Nedyu Nedev, Zvezditza Nenova, Stephan Kozhukharov, Stefan Ivanov, Toshko Nenov

200-204
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TECHNOLOGICAL PROJECT FOR VERTICAL AQUACULTURE PRODUCTION

Neli Nikolova

205-210
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DEVELOPMENT OF A SYSTEM FOR ASSESSMENT OF DIGITAL PROFESSIONAL SUITABILITY IN THE COMPANY ENVIRONMENT

Neli Nikolova

211-216
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EXPERIMENTAL STUDY OF TURBULENCE IN THE TEST SECTION OF WIND TUNNEL

Hristian Panayotov, Stanimir Penchev, Martin Zikyamov

217-220
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INNOVATIVE OBSOLESCENCE IN MECHANICAL ENGINEERING AND SINGLENESS OF INDICATORS

Desislava Petrova

221-224
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NON-LINEAR MODEL IN REGION OF VERY LOW SPEEDS FOR A PERMANENT MAGNET DIRECT CURRENT MOTOR

Nickolay Popov

225-231
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DESIGN AND RESEARCH OF A DUAL-BAND IR LENS

Dimcho Pulov

232-237
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INVESTIGATION OF THE INFLUENCE OF TECHNOLOGICAL KNITTING PARAMETERS ON THE UNRAVELLING OF STRUCTURES

Ralitsa Penkova, Krasimir Drumev, Borislav Stoyanov, Desislava Kovacheva

238-241
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BEHAVIOR OF SHORT FIBER COMPOSITE MATERIALS IN VARIATION OF THERMAL AND MECHANICAL LOADING

Karunamoorthy Rengasamy Kannathasan, Arthur Macanovskis, Rajeev Ralla, Eirik Gjerlow

242-247
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MECHANICAL BEHAVIOR OF COMPOSITE BASALT SHORT FIBER FOR CONCRETE STRUCTURE REINFORCEMENT

Karunamoorthy Rengasamy Kannathasan, Andrejs Krasnikovs, Arthur Macanovskis, Iveta Novakova

248-252
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TECHNICAL METHODS OF CLEANING SHIPWRECKS FROM GHOST NETS

Astrida Rijkure, Janis Megnis

253-256
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OPTIMIZING 3D PRINTING PARAMETERS TO IMPROVE HARDNESS AND SURFACE ROUGHNESS

Sabi Sabev, Konstantin Chukalov, Valeri Bakardzhiev, Agop Izmirliyan

257-261
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OPTIMIZING 3D PRINTING PARAMETERS TO IMPROVE DIMENSIONAL ACCURACY

Sabi Sabev, Konstantin Chukalov, Valeri Bakardzhiev, Agop Izmirliyan

262-267
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DESIGNING A LABORATORY STAND FOR TESTING IMPACT RESISTANCE OF PLASTIC FILMS BY FREE-FALLING DART DROP ACCORDING ASTM D1709

Sabi Sabev, Konstantin Chukalov, Valeri Bakardzhiev

268-273
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OPTIMIZING TENSILE STRENGTH AT MAG WELDING PROCESS OF S235JR STEEL

Sabi Sabev, Konstantin Chukalov

274-278
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RESEARCH OF ROBOTIC SYSTEM POSITIONING ACCURACY

Paulius Sakalys, Loreta Savulioniene, Dainius Savulionis, Anastasiya Chupryna, Kyrylo Smelyakov

279-282
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A UNIFIED MODEL FOR ANALYZING DIMENSIONAL RELATIONSHIPS

Silviya Salapateva

283-289
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PURPOSEFUL DIMENSIONING OF DETAILS, PROCESSED ON CNC MACHINE TOOLS

Silviya Salapateva

290-294
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RECYCLING OF TEXTILE WASTE INTO SOUND-ABSORBING ACOUSTIC PLATES

Kristaps Siltumens, Inga Grinfelde, Ginters Znots, Rudolfs Golubovs, Raitis Brencis

295-299
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TECHNICAL OBSTACLES TO SPEECH INTELLIGIBILITY

Georgi Stanchev

300-305
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COOLING GLOVE COMPARTMENT OF A VEHICLE BY THERMOELECTRIC COOLERS

Çiğdem Susantez, Hilmi Kuşçu, Kamil Kahveci

306-311
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ENHANCED EFFICIENCY IN TWO-COMPONENT INJECTION MOLDING PRODUCT FOR AUTOMOTIVE APPLICATIONS

Todor Todorov, Georgi Todorov, Ivan Ivanov

312-318
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INFLUENCE OF THE PARAMETERS OF THE LASER MARKING PROCESS ON THE DEPTH OF PENETRATION IN LAYER-REINFORCED COMPOSITES

Simeon Tsenkulovski, Ivan Mitev

319-324
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AN ESTIMATION OF THE HYDRODYNAMIC FLOW FIELD (HDFF) AROUND A SPHERE THROUGH CFD AND EXPERIMENT

Cvetelina Velkova

325-329
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USING ADVANCED FLUID FLOW SIMULATION OF CENTRIFUGAL PUMP FOR THE PURPOSE OF EDUCATION OF MARITIME PROFESSIONALS

Cvetelina Velkova

330-334
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MATHEMATICAL MODEL EQUATION OF THE ENERGY WILLOW CUTTING UNLOADING PROCESS FROM THE SLOT HOPPER AUTOMATED PLANTER

Serhii Yermakov, Taras Hutsol, Iryna Mushenyk, Stepan Zamojskij, Oleksandr Hovorov

335-341
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JUSTIFICATION OF THE PARAMETERS AND DEVELOPMENT OF THE DESIGN OF THE MECHANISM OF AUTOMATED SELECTION AND SUPPLY OF CUTTINGS IN ENERGY CULTURE PLANTS

Serhii Yermakov, Oksana Bialkovska, Viktor Duhanets, Pavlo Potapskyi, Mykola Volynkin

342-247
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FACILITATION OF THE 3D SCANNING PROCESS OF INDUSTRIAL SITES USING A SELF-MOVING AUTONOMOUS ROBOTIC SYSTEM

Mihail Zagorski, Radoslav Miltchev

348-351
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COMPUTER MODELING AND SIMULATION OF MECHANISMS USING FREE AND OPEN-SOURCE SOFTWARE

Mihail Zagorski, Radoslav Miltchev, Mario Semkov

352-356
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Laser Technologies

LASER RADIATION MADE HYDROPHOBIC SURFACE ON STAINLESS STEEL FOR FOOD INDUSTRY, A REVIEW

Arturs Abolins

358-362
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INVESTIGATION OF LASER TEXTURING ON THE SURFACE OF ANODIZED ALUMINIUM

Lubova Denisova, Antons Pacejs, Emil Yankov, Lyubomir Lazov

363-369
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INVESTIGATION OF LASER MARKING ON CHROMIUM-NICKEL SAMPLES

Nikolay Dolchinkov, Milen Tortorikov

370-374
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NUMERICAL MODELING OF LASER TRANSMISSION WELDING: STATE OF THE ART

Ivo Draganov, Lyobomir Lazov

375-380
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DETERMINATION OF PRELIMINARY OPERATING INTERVALS OF THE POWER DENSITY FOR LASER TECHNOLOGICAL PROCESSES ON COPPER SAMPLES

Risham Ghalot, Lyubomir Lazov, Nikolay Angelov, Edmunds Teirumnieks

381-386
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INVESTIGATION OF LASER TEXTURING PARAMETERS AND THEIR IMPACT ON GLUE ADHESION PROPERTIES ON THE SURFACE OF BIRCH PLYWOOD

Artis Stanislavs Gusts, Imants Adijāns

387-392
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INFLUENCE OF TECHNOLOGICAL PARAMETERS ON LASER MARKING PROCESS OF COPPER SURFACES

Vitālijs Jurčs, Emil Yankov, Nikolay Angelov, Antons Pacejs, Imants Adijāns

393-398
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INVESTIGATION FIBER LASER EFFECTS ON TITANIUM GR2: COLOR MARKING AND SURFACE ROUGHNESS

Jekabs Lapa, Imants Adijāns, Emil Yankov, Lyubomir Lazov, Ritvars Rēvalds

399-405
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METHODS FOR MEASUREMENT OF PULSE PARAMETERS OF FIBER LASERS

Lyubomir Lazov, Tsanko Karadzhov, Edmunds Teirumnieks, Antons Pacejs, Conyu Conev

406-412
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INVESTIGATION OF THE OPTIMIZATION PROCESS OF LASER SURFACE MARKING ON POLYAMIDE SAMPLES

Anželika Litavnieka, Imants Adijāns, Emil Yankov, Lyubomir Lazov, Artis Bikovs

413-418
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LASER SURFACE MARKING ON ENGINEERING THERMOPLASTIC: POLYAMIDE

Anželika Litavnieka, Imants Adijāns

419-424
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STUDY OF ADHESION OF PHYSICAL VAPOR DEPOSITION COATINGS ON FUNCTIONAL TEXTILE WITH LASER POST-PROCESSING

Silvija Mežinska, Antons Pacejs, Imants Adijāns, Edgars Zaicevs, Lyubomir Lazov

425-429
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MODELING THE INFLUENCE OF GRAIN MORPHOLOGY ON THE LASER ENGRAVING PROCESSES

Roussi Minev, Veselin Hristov, Danail Gospodinov, Emil Yankov, Mariana Ilieva

430-433
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THE IMPACT OF CO2 LASER POWER AND SCANNING SPEED ON VARIOUS WOOD AND THERMOWOOD SAMPLES

Dzintars Rāviņš, Imants Adijāns, Emil Yankov, Vladislavs Bakakins

434-439
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OBTAINING A PROMISING LASER INDUCED SURFACE NANOSTRUCTURE OF TITANIUM ALLOY FOR BIOCOMPATIBILITY

Edmunds Sprudzs, Lyubomir Lazov, Emil Yankov, Imants Adijans

440-444
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METHODOLOGY AND MODEL FOR THE STUDY OF RELATIVE ACCURACY DEVIATION IN LASER CUTTING OF C 235 STEEL

Nikolay Tonchev, Victor Georgiev, Nikolay Dolchinkov, Nikolay Padarev, Emil Yankov

445-448
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MULTI-CRITERIA RESEARCH OF GEOMETRIC, MECHANICAL, ENERGETIC ANDTEMPORAL INDICATORS DEPENDING ON LASER HARDENING PARAMETERS

Nikolay Tontchev, Normunds Teirumnieks, Emil Yankov, Valentin Gaydarov

449-455
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MODELING THE HARDENING OF CARBON STEELS AFTER QUENCHING AND TEMPERING

Nikolay Tontchev, Normunds Teirumnieks, Emil Yankov

456-459
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INVESTIGATION OF THE EFFECT OF LASER POWER, SPEED AND FREQUENCY ON SURFACE ROUGHNESS AND COLOR MARKING ON AISI 304

Gatis Tutins, Imants Adijans, Emil Yankov, Artis Bikovs

460-464
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