The study presents results of the measurements of the atmospheric nitrogen dioxide concentration and simultaneous meteorological variables: average temperature, air pressure, and relative humidity, speed and wind direction. The data were collected from July 2015 to June 2017 at stations located in Banja Luka (locality Centre). Nitrogen dioxide is o...

By Predrag Ilić, Zoran Popović, Suzana Gotovac-Atlagić

The water supply system is a set of facilities related to a functional unit with the primary aim of ensuring sufficient quantities of quality water by the most economical way. Design and implementation of such systems requires extensive previous research and analysis aimed at finding the optimal solution of water supply system.This paper presents a...

By Nedim Suljić, Jasmin Hrnjadović

Doped ceramics materials structure can be controlled using different synergetic effects as well as consolidation parameters. Additives concentration influence on ceramics microstructure and dielectric properties, based on fractal geometry, is analyzed. These properties level control level is very important in advanced materials prognosis. The Coble...

By V. Vojislav Mitić, Ljubiša Kocić, Vesna Paunović, Filip Bastić

The computer program ADINA is used for the pressure analysis on the model of the underground opening, trapezoidal in shape in layers of lignite. An analysis was made before, during and after the setting of three and five anchors. The theory about pressure distribution for secondary and tertiary pressure condition in the roof and board sides of the ...

By Semir Fejzić, Jovo Miljanović, Edin Fazlić

In the rock salt deposit "Tetima" by analysis of situation and pore (layers) pressures and fracturing pressures development it has been proved that the values of pore and fracturing pressures are quite low (in the part of deposit which is currently exploited) and on the border of use salt water such as fluid for canal rinse in some drilling interva...

By Sanel Nuhanović, Adnan Hodžić, Almir Šabović

Cemented boreholes annulus its stability achieved tightness must be maintained in the continuation phase of drilling, is that in the process of drilling, cementing, production. Preserving stability in the working life of the wells threatened and technological stage of the production process due to the natural development of conditioned stress-laden...

By Zvonimir Bošković, Vladimir Čebašek

World production of pipes is mainly based on the standards of API. However, this does not obligate you to use exclusively for casing manufactured by API standards. The wells that will exploit the hydrocarbons and aggressive media, install the protective casing made of alloy steel not yet covered by API standards. Running casing operation holds a sp...

By Zvonimir Bošković, Vladimir Čebašek, Sanel Nuhanović

Implementation of major construction projects thanks are due to the technological development of materials and equipment to perform. Development of equipment for piles, allowed this type of structure a large application, as in the system of basic structural elements, as well as providing (temporary or permanent) construction site. Influences on the...

By Svjetlana Vlaški

The landslide is located in the hinterland of water source "Studenac" in the local community Gornja Cadjavica near Bijeljina. The field where the triggered landslide occurred is conditionally stable slope. It is overgrown with forest trees and therefore it was not a subject of interest in terms of its stability until the water source and accompanyi...

By Neđo Đurić, Milan Perisić, Dijana Đurić

Wells conditions are different in wide range of temperature and depth. Cement slurries in such conditions have to remain pumpable and after setting to stay homogenous in production well life. For cementing operations in wide range of temperature and pressure and to accommodate cement slurries for individual well requirements more than 50 additives ...

By Zvonimir Bošković, Vladimir Čebašek, Nebojša Gojković