ON THE ABRASIVE WEAR HIGH STRENGTH COATING LAYERS ON MACHINE PARTS TESTING
Plasma coating technology was applied to machine parts. During application, the jet formed hits the surface of the material and particles are deposited on the surface. In this way, layers of high thickness can be applied and thus revitalize worn machine parts. The paper examines the abrasion resistance of Al2O3 and Al2O3 phosphate layers applied to...
By Pavel Kovač, Borislav Savković, Dušan Jesić, Ildico Mankova
PARAMETRIC OPTIMIZATION OF THE STRUCTURE OF CONTROLLED HIGH-VOLTAGE CAPACITOR BATTERIES
The article considers the issues of increasing energy efficiency of 6-10 kV controlled capacitor plants of power supply systems of energy-intensive facilities due to more accurate compensation of reactive power. Analysis of the most common circuits for connecting batteries of static capacitors using semiconductor and electromechanical switches was ...
By Vladimir Babenko, Alexandr Danilov, Dmitrii Vasenin, Valery Krysanov
GEOCHEMISTRY AND PETROGENESIS OF OLIGOCENE DACITES FROM THE CENTRAL BOSNIA AND HERZEGOVINA WITH INSIGHT IN THE POSTCOLLISIONAL TECTONIC EVOLUTION OF CENTRAL DINARIDIC OPHIOLITE BELT
Magmatic rocks of post-Late Eocene magmatic formation are widespread in the Sava segment of SavaVardar suture zone and adjoin areas. The rocks formed as a response to transpressional-transtensional tectonic activity preceded by the Cretaceous-Eocene compression of the Internal Dinarides and Tisia Unit as fragments of Eurasian continental lithospher...
By Zehra Salkić, Boško Lugović, Elvir Babajić
HAULAGE ANALYSIS IN THE AIM OF THE COMBINED SYSTEM APPLICATION ON THE LEAD AND ZINC MINE "SASE" SREBRENICA
One of the most important influencing factors on the economy of mines with surface and underground exploitation is the correct choice of haulage technology of ore and waste.The paper analyzes the haulage of ore and waste in the Lead and Zinc Mine “Sase” Srebrenica and determines the optimal haulage length on the four excavation blocks for the appli...
By Duško Torbica, Vladimir Malbašić, Dražana Tošić, Jovan Popović
POTENTIALITY OF THE BUGOJNO COAL BASIN, BOSNIA AND HERZEGOVINA
This paper presents research results of the Bugojno coal basin, which contains very significant, but still insufficiently explored lignite reserves. Based on the determined borders of surface distribution and the research results in the northwestern part of the Bugojno coal basin, proved are four coal layers with reserves of over one billion tons o...
By Dževad Forčaković, Rejhana Dervišević
INFLUENCE OF CREEP CONCRETE ON SPACE STABILITY THIN-WALLED DOME COVERINGS
The task was set, due to the capabilities of modern software systems, to assess the effect of the increase in inelastic deformations under prolonged load action on the loss of stability of thin-walled dome coverings. The study of the dependences of the forms of the loss of stability of dome covering from creep concrete that will help further with o...
By Sergey Gridnev, Ekaterina Prokshits, Olga Sotnikova, Iana Zolotukhina
INFLUENCE OF ROUGHTY OF A RECTANGULAR OPEN CHANNEL ON FLOW SPEEDS AND WATER FLOW
This paper presents an analysis of water flow and flow velocity in an open channel of rectangular cross section as a function of channel roughness, ie Manning roughness coefficient. Three different cases of finishing the open channel of rectangular cross-section were analyzed, namely the concrete channel, the channel with smoothed cement mortar and...
By Nedim Suljić
CHEMICAL LEACHING OF CONTAMINATED SOIL – CASE STUDY
This study presents results of chemical leaching of contaminated soil from several metallurgically loaded locality of Richnava in Slovakia, applying two chelants – Na2EDTA and Na3EDDS of different molar concentration, done at different leaching conditions. The lower molar concentration (2 mM) of chelants showed comparable effect on Mn, Ni, As...
By Zuzana Danková, Iveta Štyriaková, Ľubica Kovaničová, Katarína Čechovská, Marián Košuth, Jaroslav Šuba, Jarmila Nováková, Patrik Konečný, Ľubomír Tuček, Katarína Žecová, Eva Lenhardtová, Zoltán Németh
DEICING REAGENTS IN URBAN ECOSYSTEMS, USING THE EXAMPLE OF MOSCOW
Deicing reagents have an impact on the environment. The composition of the deicing reagents used in Moscow has undergone certain changes. However, the main components of deicing reagents were chlorides, including calcium chloride and (or) sodium chloride. We also conducted research on the effects of sodium chloride and calcium chloride on some urba...
By Olga Victorovna Gladkova, Evgeny Aleksandrovich Gladkov
PLANTS AND MAXIMUM PERMISSIBLE CONCENTRATIONS OF HEAVY METALS IN SOIL
The tentative permissible concentrations and the maximum permissible concentration of heavy metals do not always give a complete adequate assessment of the effect on plants. Plant growth inhibition can be at concentrations below the maximum permissible concentrations and tentative permissible concentrations. We studied the effect of copper, zinc, c...
By Evgeny Aleksandrovich Gladkov, Olga Victorovna Gladkova