Tool traveling and tool switching time constitute almost seventy percent (70%) of the total timeconsumed in drilling process. This fact that 70% of the total time is nonproductive and does not add any value to the job, grabs attention of the researchers and the industrialist for optimization. A literature on drilling process revealed that very few ...

By Mehmood Nasir, Muhammad Umer, Umer Asgher

Topical issues of formation of sustainable urban environment were analyzed. In this work, the modern urban environment was considered in the form of an open dynamic system, where its state is determined by other specific laws based on the mutual influence of the components of the system taking into account external influences. The safe city environ...

By Olga Sotnikova, Elena Zhidko, Ekaterina Prokshits, Iana Zolotukhina

The research in this paper refers to the definition and scientific explanation of relevant indicators (indicators and sub-indicators) that effect on the development of geoheritage (Petnička cave, gorge of the river Gradac and Trešnjica, and Taor springs) and their placement on the tourism market. By applying the GAM model, it has been proven that g...

By Marija Perić, Slobodanka Stankov

This paper presents the results of detailed geological investigations of the Middle Triassic dolomite deposit of Nikolin Potok, which is located west of Bugojno. Based on the established borders of surface distribution and research results, geological reserves of about 4.6 million m3 have been determined in the wider area of the deposit. The dolomi...

By Dževad Forčaković, Rejhana Dervišević

The aim of this paper is to present a landslide's remediation conducted on the basis of research and testing of samples, and list those measures that will help to remediate the landslide or partially mitigate its further effects. These measures include: closing cracks, collecting and draining surface water from landslides, terrain planning, making ...

By Zlatan Talić, Dženita Cerić, Ajla Rekić, Anela Hrnjica

In order to find the optimal solution for the drainage of rainwater from roads in urban areas, as well as for the evaluation and ranking of conceptual solutions, appropriate mathematical models and software packages were used in this research. For relevant rain episodes, i.e. rainfall of appropriate duration and intensity, runoff coefficients and f...

By Anadel Galamić, Zahid Bašić, Nedim Suljić

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

Risk management throughout the project life cycle, from the initial phase beginning to the final phase, ended continuously and dynamically, is one of the basic requirements for the success of any project oriented organization. To effectively identify and manage risks at all stages of the project, careful selection must be made at all levels of the ...

By Asl Maryam Tabatabay, Asl Saeedeh Tabababay

Harvest residues (HR) are one of the important aspects of sustainable management in agriculture, representing a significant portion of organic matter (OM) that can be retained or removed from agroecosystems. There are several ways to manage plant residues: (i) burning, (ii) incorporation in soil, (iii) leaving plant residues after harvest on the s...

By Novo Pržulj, Vesna Tunguz, Zoran Jovović, Ana Velimirović

Old-growth forests represent a very valuable field for research of natural processes. The application of remote sensing was carried out on two old-growth forests in the northwestern part of the Republic of Srpska. The sample plots from OG Janj show relatively higher mean values (NDVI, SAVI and EVI) compared to OG Lom, with the exception of the VARI...

By Zoran Govedar, Nemanja Anikić, Srđan Bilić