ENGINEERING FOR RURAL DEVELOPMENT

Latvia University of Agriculture Faculty of Engineering 10 t h International Scientific Conference ENGINEERING FOR RURAL DEVELOPMENT Proceedings, Vo...
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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

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