Latvia University of Agriculture Faculty of Engineering
10 t h International Scientific Conference
ENGINEERING FOR RURAL DEVELOPMENT Proceedings, Volume 10 May 26-27, 2011
Jelgava 2011
PROGRAM COMMITTEE Chairman Gints Birzietis, Prof., Dr.sc.ing. Members: Maris Kirsis, Prof., Dr.sc.ing. Kaspars Vartukapteinis, Prof., Dr.sc.ing. Milan Brozek, Prof., Dr.sc.ing. Andrzej Niewczas, Prof., Dr.habil.sc.ing. Gvidonas Labeckas, Prof., Dr.sc.ing. Jukka Ahokas, Prof., Dr.Techn. Juri Olt, Prof., Dr.sc.ing. Gunars Verdins, Prof., Dr.sc.ing. Stanislaw Winnicki, Prof., Dr.habil.sc.ing. Simon Popescu, Prof., Ph.D. Waclaw Romaniuk, Prof., Dr.habil.sc.ing. Dainis Berjoza, Assoc. prof., Dr.sc.ing.
Latvia University of Agriculture
Latvia University of Agriculture Latvia University of Agriculture Czech University of Life Sciences Prague Technical University of Lublin, Poland Lithuanian University of Agriculture University of Helsinki, Finland Estonian University of Life Sciences Latvia University of Agriculture Institute of Technology and Life Sciences, Poland Transilvania University of Brasov, Romania Institute for Building, Mechanization and Electrification of Agriculture, Poland Latvia University of Agriculture
ORGANISING COMMITTEE Chairman Ruslans Smigins, lecturer, Dr.sc.ing. Members: Daina Kanaska, Assoc. prof., Dr.sc.ing. Aleksandrs Galoburda, Prof. assist., Dr sc.ing. Ilmars Dukulis, lecturer, Mg.sc.ing. Vilnis Pirs, lecturer, Mg.sc.ing. Zanis Jesko, lecturer, Mg.sc.ing. Janis Laceklis-Bertmanis, assistant, Mg.sc.ing. Una Bunke, Bc.soc. EDITORS Editor of language: Larisa Malinovska, Asoc. prof., Dr.paed. Technical editor: Vitalijs Osadcuks, lecturer, Mg.sc.ing. REVIEWERS K. Vartukapteinis, A. Jasinskas, G. Labeckas, A. Annuk, A. Kakitis, J. Palabinskis, J. Priekulis, G. Birzietis, D. Berjoza, R. Smigins, I. Dukulis, J. Tupins, A. Zeidmane, A. Laizans, A. Galins, V. Osadcuks, W. Romaniuk, D. Viesturs, A. Vilde, I. Nulle, R. Selegovskis, A. Kronbergs, E. Kronbergs, D. Kanaska, G. Verdins, A. Aboltins, A. Sniders, L. Peks, I. Ziemelis, Z. Jesko, J. Laceklis-Bertmanis, V. Dubrovskis, I. Plume, G. Moskvins. ABSTRACTED AND INDEXED: AGRIS; CAB ABSTRACTS; CABI full text; EBSCO Academic Search Complete; Thomson Reuters Web of Science; Elsevier Scopus; PROQUEST database. ONLINE: Proceedings ENGINEERING FOR RURAL DEVELOPMENT is available online at http://tf.llu.lv/conference/proceedings2011/
ENGINEERING FOR RURAL DEVELOPMENT
Jelgava, 26.-27.05.2011.
CONTENT Peteris Rivza, Baiba Rivza
AGRICULTURAL SCIENCE IN LATVIA ............................................................................................9 Sven Peets, Matis Luik, Arvo Leola
DEVELOPMENT OF APPLIED HIGHER EDUCATION PROGRAM BIOSYSTEMS ENGINEERING IN ESTONIA .............................................................................................................14 Pavel Kic, Milan Zajicek
NEW METHODS IN EDUCATION OF HVAC FOR ERABEE .........................................................20 Petr Hermanek, Adolf Rybka, Ivo Honzik, Jiri Masek, Lubomir Vent
ENGINEERING PROBLEMS DURING PULLING-DOWN OF HOP STRINGS AND THEIR ATTACHMENTS ..................................................................................................................................26 David Hoffmann, Adolf Rybka, Petr Hermanek, Ivo Honzik
TECHNICAL PROJECT FOR HOP CUTTING EQUIPMENT IN LOW TRELLIS SYSTEM ..........32 Semjons Ivanovs, Stanislaw Gach, Ireneusz Skonieczny
INVESTIGATION INTO FILM CONSUMPTION FOR SEALING SQUARE SILAGE BALES ....................................................................................................................................37 Dainis Lapins, Janis Kopmanis, Aigars Plume, Janis Gmizo
EFFECT OF DIFFERENCES IN REGULATED AND UNREGULATED FACTORS IN SOIL ARABLE AND SUBSOIL LAYERS ON YIELD OF WINTER WHEAT AND WINTER OIL SEED RAPE ...................................................................................................................................43 Jiri Masek, Milan Kroulik, Zdenek Kviz, Vaclav Prosek
YIELD DETERMINATION OF FORAGE CROPS BY ROUND BALERS PRESSING ...................47 Petr Novak, Pavel Kovaricek, Jiri Masek, Josef Hula,
MEASUREMENT OF SOIL RESISTANCE TO WATER EROSION IN THREE WAYS OF ESTABLISHING MAIZE CROP ..........................................................................................................51 Janis Latvietis, Juris Priekulis
CONSUMPTION OF CONCENTRATED FEED FOR MILK COWS IN CONDITIONS OF ROBOTIZED TECHNOLOGY.............................................................................................................55 Ansis Salins, Maris Freimanis, Juris Priekulis
PREPARATION AND DISTRIBUTION OF FORAGE MIX USING MOBILE MACHINERY .......................................................................................................................59 Oliver Sada, Boris Reppo
EMISSION OF AMMONIA IN PIGSTIES...........................................................................................64 Egidijus Sarauskis, Kestutis Romaneckas, Edvardas Vaiciukevicius, Algirdas Jasinskas, Antanas Sakalauskas, Sidona Buragiene, Evaldas Katkevicius, Davut Karayel
EFFECT OF ENVIRONMENTALLY FRIENDLY TILLAGE MACHINERY ON SOIL PROPERTIES ........................................................................................................................................70 Dainius Steponavicius, Sigitas Petkevicius, Rolandas Domeika
DETERMINATION OF RATIONAL VALUES OF INCLINATION ANGLES OF STRAW WALKER SECTIONS...........................................................................................................................76 Taavi Leola, Mati Heinloo
REVIEW OF STUDIES ON PRESS MANURE REMOVAL ..............................................................82 Aivars Aboltins, Andris Upitis
MATHEMATICAL MODEL OF CARROT SLICES DRYING ..........................................................88 Edgars Rudzroga
ALGORITHM FOR GRANULAR MATERIAL FLOW RECOGNITION USING VISUAL DATA........................................................................................................................93 Sandis Vilums
TOWARDS APPLICATION OF METABOLIC MODEL OF SACCHAROMYCES CEREVISIAE IN BIOPROCESS CONTROL ALGORITHM...............................................................97 3
ENGINEERING FOR RURAL DEVELOPMENT
Jelgava, 26.-27.05.2011.
Ivars Mozga, Andrejs Kostromins, Egils Stalidzans
FORECAST OF NUMERICAL OPTIMIZATION PROGRESS OF BIOCHEMICAL NETWORKS .................................................................................................... 103 Agris Pentjuss, Aleksejs Zacepins, Aleksandrs Gailums
IMPROVING PRECISION AGRICULTURE METHODS WITH MULTIAGENT SYSTEMS IN LATVIAN AGRICULTURAL FIELD....................................................................... 109 Jurijs Meitalovs
DEVELOPMENT OF CHEMOSTAT SUPPLY SYSTEM DURING FERMENTATION PROCESS............................................................................................................ 115 Monika Hromasova, Miloslav Linda
SIMULATION OF IMPACT SENSORS FOR PRECISION AGRICULTURE ................................ 121 Iulian Voicea, Ion Pirna, Valentin Vladut, Mihai Matache, Sorin Bungescu
MEASURING INFORMATIONAL SYSTEM BY SATELLITE USED FOR OBTAINING OF SOME EXPERIMENTAL MODELS OF AGRICULTURAL PRODUCTION MAPS IN THE PRECISION AGRICULTURE CONCEPT ........................................................................................ 126 Ciprian George Pirna, Simona Lache
INTEGRATION OF SOIL SPECIFIC PARAMETERS IN DESIGNING DECISION SUPPORT SYSTEM IN PRECISION AGRICULTURE ..................................................................................... 132 Tudor Alexandru, Mihnea Glodeanu, Sorin Boruz, Simion Popescu
EXPERIMENTAL RESEARCH ON MECHANIZED HARVESTING OF PEANUTS IN ROMANIA............................................................................................................ 137 Mihnea Glodeanu , Tudor Alexandru , Sorin Boruz , Simion Popescu
EXPERIMENTAL RESEARCH ON ELECTRONIC SYSTEM FOR AUTOMATIC ADJUSTMENT OF WORKING FLOW AND MOVING VELOCITY IN AGRICULTURAL SPRAYING MACHINES ................................................................................................................... 142 Antanas Lapinskas, Aleksandras Kirka, Valentina Lapinskiene
THEORETICAL INVESTIGATIONS OF VEHICLE OPERATING WITH AUXILIARY DRIVING WHEELS WITH HYDROSTATIC TRANSMISSION ............................. 148 Aleksandras Kirka
RESEARCH IN INCREASING PERFORMANCE OF HIGH HYDRAULIC POWER SYSTEMS ............................................................................................................................ 153 Janis Laceklis-Bertmanis, Eriks Kronbergs
STIFFNESS AND DAMPING CONSTANT ADJUSTMENT FOR TRACTOR HYDRAULIC HITCH – SYSTEM MODEL .............................................................................................................. 157 Aleksandrs Janushevskis, Anatolijs Melnikovs, Janis Auzins, Anita Gerina-Ancane, Helmuts Klimass
SIMULATION OF BEHAVIOR OF VEHICLE GAGE PANEL ...................................................... 162 Uldis Putnieks
AUTOMOBILE FUEL CONSUMPTION CHANGES AS AFFECT OF LOAD .............................. 168 Maris Gailis, Vilnis Pirs
RESEARCH IN INFLUENCE OF ENGINE AIR FILTER REPLACEMENT PERIODICITY........ 173 Dainis Berjoza, Inara Jurgena
ECONOMIC EFFECT OF ELECTRIC VEHICLES .......................................................................... 179 Dainis Berjoza
DYNAMICS OF SLOW-MOVING ELECTRIC VEHICLES ........................................................... 185 David Blazej, Jiri Soucek
GLOBAL POSITIONING SYSTEM UTILIZATION FOR MONITORING OF ENERGETIC BIOMASS LOGISTIC PROCESSES ................................................................................................. 191 Juri Olt, Ulo Traat
THE MAINTENANCE COSTS OF ESTONIAN TRACTOR-FLEET.............................................. 196 Dainis Viesturs, Nikolajs Kopiks, Ligita Melece, Ilmars Zakis
METHODOLOGICAL ASPECTS FOR ESTIMATION OF IMPACT OF MODERNISATION OF FLEET OF TRACTORS UPON POLLUTING EMISSIONS IN THE AIR ................................ 201 4
ENGINEERING FOR RURAL DEVELOPMENT
Jelgava, 26.-27.05.2011.
Jan Krmela, Vladimira Tomanova
COMPOSITES WITH NONLINEAR MATRIX FOR TRANSPORT MEANS – EXPERIMENTAL AND COMPUTATIONAL MODELING ............................................................206 Inshakov Sergey, Ishchenko Sergey, Osipov Maxim, Klepcova Julia
MODERN TECHNOLOGIES OF TECHNICAL SERVICE OF CATERPILLAR RUNNING PART ................................................................................................................................212 Mihaela Florentina David, Edmond Maican
STUDY OF MODEL WITH SINGLE DEGREE OF FREEDOM FOR TRACTORS .......................217 Sorin-Stefan Biris, Nicoleta Ungureanu, Edmond Maican, Erol Murad, Valentin Vladut
FEM MODEL TO STUDY THE INFLUENCE OF TIRE PRESSURE ON AGRICULTURAL TRACTOR WHEEL DEFOEMTATIONS..........................................................................................223 Simion Popescu, Sorin Boruz , Mihnea Glodeanu, Tudor Alexandru, Florin Loghin
CONTRIBUTIONS TO DEVELOPMENT AND TESTING OF CENTRALIZED CONTROL SYSTEM OF INFLATION PRESSURE IN AGRICULTURAL TRACTOR TYRES ACCORDING TO SOIL AND WORKING CONDITIONS .................................................229 Birute Skukauskaite, Stasys Slavinskas
EXPERIMENTAL INVESTIGATION ON INJECTION CHARACTERISTICS OF RAPESEED OIL AS FUEL FOR DIESEL ENGINES .................................................................234 Vladimir Baks, Ilmars Dukulis, Aivars Birkavs
EMISSION AND FUEL CONSUMPTION STUDIES USING SEPARATED AT LOW TEMPERATURES PURE RAPESEED OIL.......................................................................................239 Gunars Bremers, Gints Birzietis, Anita Blija, Aleksejs DanilevicsArnolds Skele
SCHEME OF TECHNOLOGY FOR CONGRUENT DEHYDRATION OF BIOETHANOL IN SEMI-ARID WAY .........................................................................................................................244 Juri Olt, Villu Mikita, Risto Ilves, Arne Kuut
ETHANOL AS AN ADDITIVE FUEL FOR DIESEL ENGINES......................................................248 Juri Olt, Villu Mikita, Risto Ilves, Arne Kuut, Marten Madissoo
IMPACT OF ETHANOL ON FUEL INJECTION PUMP OF DIESEL ENGINE .............................254 Krzysztof Gorski, Ruslans Smigins
IMPACT OF ETHER/ETHANOL AND BIODIESEL BLENDS ON COMBUSTION PROCESS OF COMPRESSION IGNITION ENGINE.......................................................................260 Gvidonas Labeckas, Stasys Slavinskas, Marius Mazeika, Kastytis Laurinaitis
PERFORMANCE AND EMISSION CHARACTERISTICS OF DIESEL ENGINE FUELLED WITH ETHANOL-DIESEL-BIODIESEL BLEND ............................................................................266 Ilona Odzina, Reinis Rutkis, Uldis Kalnenieks
IN SILICO ENGINEERING OF BIOCHEMICAL NETWORK OF ZYMOMONAS MOBILIS ADAPTATION FOR GLYCEROL CONVERSION INTO BIOETHANOL .....................................272 Janis Mistris, Gints Birzietis
MOST WIDESPREAD TRUCK FUEL SYSTEMS IN LATVIA.......................................................277 Janis Mistris, Gints Birzietis
PERSPECTIVE MOST WIDESPREAD USED VEHICLE FUEL SYSTEMS IN LATVIA..........................................................................................................................................282 Valentin Vladut, Mihai Matache, Iulian Voicea, Lucretia Popa, Sorin Biris, Gige Paraschivl, Edmond Maican
NEW BIODEGRADABLE OILS USED IN AGRICULTURE ..........................................................288 Kaupo Toom, Kuno Jurjenson, Tauno Juhanson, Andres Annuk
CUTTING WIND GENERATOR POWER CHART PEAKS TO MITIGATE POWER FORECAST ERROR ............................................................................................................294 Andres Annuk, Timo Tamm, Terje Hõim, Yiannis A Katsigiannis, Veli Palge
CONFIGURATION OF INTEGRATED ENERGY SYSTEM ACCORDING TO PROBABILISTIC INFORMATION.............................................................................................299 5
ENGINEERING FOR RURAL DEVELOPMENT
Jelgava, 26.-27.05.2011.
Ivars Rankis, Janis Donins, Vytautas Beniusis
COMPENSATED SINGLE-PHASE RECTIFIER ............................................................................. 305 Vitalijs Osadcuks, Aldis Pecka, Aldis Lojans
HARDWARE AND SOFTWARE ENVIRONMENT FOR EVALUATION OF CONTROL ALGORITHMS AND STRATEGIES OF HYBRID POWER SYSTEMS .................... 311 Dmitrij Shirkin, Ivars Rankis
POWER EFFICIENCY IMPROVEMENT OF HEATING SUBSTATION USING PUMP MOTOR SPEED RATE REGULATION ............................................................................... 317 Janis Zakis, Dmitri Vinnikov, Juhan Laugis, Ivars Rankis
EXPERIMENTAL STUDY OF DYNAMIC BEHAVIOR OF DIFFERENT FLEXIBLE SYSTEMS FOR REACTIVE POWER COMPENSATION........................................... 321 Liene Kancevica, Aivars Aboltins
SUBSTANTIATION FOR CONSTRUCTION OF SOLAR COLLECTOR WITH REFLECTORS......................................................................................................................... 326 Guntis Ruskis, Aivars Aboltins, Janis Palabinskis
DIFFERENT MATERIAL INVESTIGATIONS IN AIR-HEATING FLAT-PLATE SOLAR COLLECTOR ....................................................................................................................... 330 Tatiana Ivanova, Bohumil Havrland, Victor Pobedinsky, Alexandru Muntean
ANALYSIS OF SYSTEM OF BIOMASS DRYING BY USE OF EXPERIMENTAL DRYER WITH SOLAR COLLECTOR.............................................................................................. 336 Edmunds Visockis, Peteris Vucenlazdans, Vita Ansone, Ilga Morozova
RESEARCH ON POSSIBILITIES FOR DECREASING HEAT LOSSES IN BUILDINGS............ 342 Eriks Krumins, Ilze Dimdina, Arturs Lesinskis
HEAT ENERGY CONSUMPTION ANALYSIS IN RIGA CITY NOT RENOVATED PUBLIC BUILDINGS AND IN BUILDINGS AFTER PARTIAL RENOVATION ........................ 348 Janis Fridrihsons
WATER CURATIVE TREATMENT DEVICE ................................................................................. 354 Liena Poisa, Aleksandrs Adamovics
EVALUATE OF HEMP (CANNABIS SATIVA L.) QUALITY PARAMETERS FOR BIOENERGY PRODUCTION................................................................................................... 358 Vilis Dubrovskis, Eduards Zabarovskis, Vladimirs Kotelenecs
TECHNOLOGIES FOR BIOGAS PRODUCTION IN AGRICULTURE OF LATVIA ................... 363 Vladimirs Kotelenecs,Vilis Dubrovskis, Eduards Zabarovskis
ANAEROBIC DIGESTION TECHNOLOGIES FOR DRY BIOMASS ........................................... 369 Janis Jasko, Eriks Skripsts, Vilis Dubrovskis, Eduards Zabarovskis, Vladimirs Kotelenecs
BIOGAS PRODUCTION FROM CHEESE WHEY IN TWO PHASE ANAEROBIC DIGESTION................................................................................................................ 373 Eriks Skripsts, Vilis Dubrovskis, Janis Jasko, Eduards Zabarovskis, Vladimirs Kotelenecs
INVESTIGATION OF BIOGAS PRODUCTION OF CHEESE WHEY IN PROCESSING WITH OZONE BEFORE ANAEROBIC DIGESTION ..................................................................... 377 Kestutis Navickas, Kestutis Venslauskas, Vidmantas Zuperka, Arvydas Nekrosius, Tadas Kulikauskas
ENERGY BALANCE OF BIOGAS PRODUCTION FROM PERENNIAL GRASSES .................. 382 Vilis Dubrovskis, Aleksandrs Adamovics, Imants Plume, Vladimirs Kotelenecs, Eduards Zabarovskis
BIOGAS PRODUCTION FROM GREATER BURDOCK, LARGELEAF LUPIN AND SOSNOVSKY COW PARSNIP................................................................................................ 388 Milan Brozek
LAYER NUMBER INFLUENCE ON WELD DEPOSIT CHEMICAL COMPOSITION................ 393 Petr Henc, Petr Chocholous, Miroslav Muller, Jiri Kejval
METHYLMETACRYLATE (ADHESIVE) – INFLUENCE OF CLIMATIC CONDITIONS ON PROPERTIES OF ADHESIVE BOND ....................................................................................... 398 6
ENGINEERING FOR RURAL DEVELOPMENT
Jelgava, 26.-27.05.2011.
Galina Kharkova, Olga Kononova, Andrejs Krasnikovs, Maris Eiduks, Edgars Machanovskis, Karlis Dzelzitis
ELASTIC PROPERTIES OF COTTON FABRIC BASED POLYMER COMPOSITES ..................402 Agrita Kovalska, Janis Auzins
INVESTIGATION OF VIBROPRESSING PROCESS TECHNOLOGY ..........................................408 Gunars Verdins, Daina Kanaska
RESEARCH IN METALWORKING EFFICIENCY IN DEPENDANCE ON BENCH FACILITIES ...................................................................................................................413 Julia Meciarova, Miroslav Stanovsky
CUTTING FLUIDS EVALUATION BASED ON OCCUPATIONAL HEALTH AND ENVIRONMENTAL HAZARDS .......................................................................................................418 Miroslav Muller
POLYMERIC COMPOSITES BASED ON AL2O3 REINFORCING PARTICLES.........................423 Vladimirs Gonca, Yurijs Shvabs
DEFINITION OF POISSON'S RATIO OF ELASTOMERS ..............................................................428 Petr Valasek
STRENGTH CHARACTERISTICS OF POLYMER PARTICLE COMPOSITES WITH FILLER ON THE BASIS OF WASTE FROM MECHANICAL SURFACE TREATMENT............434 Aivars Kakitis, Imants Nulle, Dainis Ancans
MECHANICAL PROPERTIES OF ENERGY CROPS......................................................................440 Andris Kronbergs, Eriks Kronbergs, Elgars Siraks, Aleksandrs Adamovics
CUTTING PROPERTIES OF DIFFERENT HEMP VARIETIES IN DEPENDENCE ON THE CUTTER MECHANISM .....................................................................................................446 Edgars Repsa, Eriks Kronbergs, Mareks Smits
BRIQUETTING MECHANISM ANALYSIS FOR SOLID BIOFUEL PRODUCTION ..................................................................................................................452 Igors Tipans, Semjons Cifanskis, Janis Viba, Vladimirs Jakushevich, Bruno Grasmanis, Guntis Kulikovskis
SYNTHESIS OF A ROBOT FISH PROTOTYPE ..............................................................................458 Maris Eiduks, Janis Viba, Lauris Shtals, Edgars Kovals, Stanislavs Noskovs
FLUID FLOW VIBRATION EXCITATION BY THE CONTROL OF INTERACTION SURFACE ................................................................................................................464 Janis Viba, Anita Gerina-Ancane, Guntis Kulikovskis, Paolo Fiorini, Liene Porina
ANLYSIS OF TRANSPORT SPEED CONTROL BASED ON FUZZY LOGICS ELEMENTS.....................................................................................................470 Emils Pudans, Guntars Uzklingis
RESEARCH IN DISMOUNTABLE SLIDE FRICTION PIVOT OPERATION FOR CONVEYOR CHAIN .................................................................................................................476 Florin Loghin, Simion Popescu, Florean Rus
DYNAMIC MODELING OF WORKING SECTIONS OF GRASSLAND OVERSOWING MACHINE MSPD-2.5 .........................................................................................................................480 Sylvia Kusmierczak
CORROSION RESISTANCE OF TITANIUM ALLOY ....................................................................486 Gheorghe Voicu, Eorgiana Moiceanu, Marin Sandu, Ion Cristian Poenaru , Paula Voicu
EXPERIMENTS REGARDING MECHANICAL BEHAVIOUR OF ENERGETIC PLANT MISCANTHUS TO CRUSHING AND SHEAR STRESS .................................................................490 Imants Bertaitis, Baiba Briede, Ludis Peks
TRENDS OF SPECIALISTS COMPETENCE IN WORK SAFETY.................................................496 Anete Mezote
DEVELOPMENT OF CROSS-CULTURAL COMMUNICATION SKILLS OF ENGINEERING STUDENTS .......................................................................................................502 7
ENGINEERING FOR RURAL DEVELOPMENT
Jelgava, 26.-27.05.2011.
Larisa Malinovska
PROMOTION OF ENGINEERING STUDENT COMPETENCES IN EXTRA-CURRICULUM ACTIVITIES ............................................................................................. 508 Gatis Vitols, Irina Arhipova, Yukako Hirata
IMPROVEMENT OF ENGINEERING WEBSITE FOR CROSS-CULTURAL ACCESSIBILITY AND USABILITY................................................................................................ 514 Irina Orlova, Anda Zeidmane
PROBLEMS IN PROFESSIONAL ENGLISH WRITING SKILLS DEVELOPMENT FOR STUDENTS OF ENGINEERING SCIENCES................................................................................... 520 Irena Katane
METHODOLOGICAL BASES FOR EVALUATION OF SPECIALIST COMPETITIVENESS......................................................................................................................... 524 Anita Aizsila
DEVELOPMENT OF PROFESSIONAL EDUCATION TEACHER COMPETENCES AT THE LATVIA UNIVERSITY OF AGRICULTURE ................................................................... 530 Sandra Sproge, Rudite Cevere
SOFTWARE DEVELOPMENT QUALITY MODELS IN ENGINEERING EDUCATION............ 536 Alexandra Novakova, Milan Brozek
EVALUATION OF TEACHING THE SUBJECT “BASIC ENGINEERING TECHNOLOGIES” .................................................................................. 542 Vladimir Romanenko, Galina Nikitina
SOME THEORETICAL DESCRIPTIONS OF COMPUTER ASSISTED LEARNING................... 548 Natasa Naprstkova
USING OF CATIA V5 SOFTWARE FOR TEACHING AT FACULTY OF PRODUCTION TECHNOLOGY AND MANAGEMENT .......................................................................................... 554 Natasa Naprstkova
MAKING OF EXPERIMENT FOR STUDENT USAGE .................................................................. 558 Kaspars Vartukapteinis, Antonina Cukure, Janis Cukurs
PROCESS OF STUDIES EVALUATED BY STUDENTS ............................................................... 564
8