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Упит dcterms_subject_txt:quality of service

2836 items

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... this method is ease of use, followed by the quality of output data. It relies on the theory of the relative weight determination of the factors in decision-making. It is based on the measurements made by comparing pairs of data, and it depends on the evaluation of experts for defining priority scales [28] ...
    ... Kolubara coal mining basin (Serbia), according to the strength of the machine, fell into the class of strong dozers, and the information on the manufacturer, type and number are stated in Table 1. During further analysis, on the basis of the quality of the available information, Liebherr PR-752/754, Caterpillar ...
    ... Liaghati, H.; Alipour, A. Developing an ethics-based approach to indicators of sustainable agriculture using analytic hierarchy process (AHP). Ecol. Indic. 2016, 60, 644–654. [CrossRef] 19. Ecer, F. A hybrid banking websites quality evaluation model using AHP and COPRAS-G: A Turkey case. Technol. Econ. ...

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... as functions of this web application are es- sentially also functions of WS4LR. WS4LR provides for the management and development of the system of morphological dictionaries as well as of wordnets, where both manipulation of individual wordnets and synchronized use of wordnets for ...
    ... The most important feature of the dictionary manage- ment module is the possibility of very efficient search of dictionaries, namely of finding subsets of lemmas based on different criteria. Fig. 1 depicts a form for management of dictionaries of simple words. Within this form, lemmas ...
    ... establishment of a relation with another important resource, the SWN. Fig. 1 Simple words dictionary management The basic principles of search and management of data in dictionaries of compounds are the same as for the dictionar- ies of simple words. However, dictionaries of compounds ...

  • History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia)

    Alena Zdravković, Maja Milošević, Kristina Šarić, Ivana Jelić, Ana Černok (2021)
    ... History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia) Alena Zdravković1, Maja Milošević1, Kristina Šarić1, Ivana Jelić2, Ana Černok3 1Faculty of Mining and Geology, University of Belgrade, Belgrade ...
    ... principal collection of the Mineralogical Museum of the Great School of Belgrade was divided into two and all the meteorite samples of the Serbian recorded falls became the inventory of the newly established Natural History Museum in Belgrade. Fortunately, new collections of minerals and meteorites ...
    ... labels was also very useful. The numbering of the samples and confirmation of the label names were done in 2014, thanks to the cooperation with Mr. Guy Consolmagno, curator of the Vatican Observatory and on the basis of a copy of the original Catalogue of the entire Mauroy's private meteorite collection ...

  • Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić (2024)
    The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...
    optimizacija, 3D model, bušenje, miniranje, O-Pitblast, softver

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... ive decision on the soil quality (RS Official Gazette, No. 88/2010) [18]. 3. Materials and Methods 3.1. Tailing Ponds The waste tailings from processing of flotation of metallic mineral ores are by-products of MMCC “Trepča” mining activities. Keeping in mind the topic of this paper—the physical and ...
    ... and chemical characteristics of deposed material and the fact that tailings have not been remediated—the basic intention was to choose and apply a method with a high level of quality that combines and allows analysis of multiple elements. The method for ranking the effect of tailings on the surrounding ...
    ... 98/83/EC of 3 November 1998 on the Quality of Water Intended for Human Consumption, Directive Drinking Water. Available online: http://eur-lex.europa.eu/legal-content/EN/TXT/?uri= CELEX%3A31998L0083 (accessed on 25 August 2016). 33. Council Directive 80/68/EEC of 17 December 1979 on the Protection of Groundwater ...

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja
    ... the highest quality of wood (Official Gazette of the Republic of Serbia, 1994). 2D geoelectrical resistivity tomography … 69 Table 1 Basic information about the cadaster parcels on the investigated terrain (Republic Geodetic Authority, 2019) Parcel Number Owner/User Way of Land Use Type ...
    ... (methane, hydrogen-sulfide, carbon-monoxide, carbon-dioxide etc.), and hydrogeological measurements for the quality of the underground water. REFERENCES ALEXANDER, A. (2010) An Overview of Landfill Gas Energy, Landfill Methane Outreach Program (LMOP). ANDRADY, A. (2011) Microplastics in the marine ...
    ... establishment of one unique resistivity scale and observing the profile line as a whole would produce the loss of model features. Because of the overwhelming heterogeneity of the subsurface it was strived to maintain the maximal amount of details of 2D models, and because of that units of the same ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... The following types of information are considered: produced quantities of coal per assortments, realized efficiency of equipment, realized wages, production standstills, breakdowns, operative events, condition of equipment and facilities, condition of dumps, quality of coal and waste water, shift ...
    ... about all types of operative events that influence production, drilling-blasting works, condition of equipment and facilities, condition of dumps, quality of coal and waste water, shift reports, etc. Figure 4 presents the form with parameters for report generation and the preview of the report. Reporting ...
    ... methodology has already been applied in the development of the first phase of the Coal Mine Pljevlja MIS aimed at monitoring and management of transportation costs, in the summer of 2005. It resulted in the establishment of an efficient system of information, thus motivating the mining management, ...

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... Directive 98/83/EC. Council Directive of 3 November 1998 on the quality of water intended for human consump- tion. Official Journal of the European, 1998. 24. REGULATION OF HYGIENIC CORRECTNESS OF DRINKING WATER. Official Gazette of the SFRY No. 42/98 and 44/99 25. WORLD HEALTH ORGANIZATION, Environmental ...
    ... probability of incidence of can- cer from chemical exposure. It is calculated using the fol- lowing formula: R=1-exp(-(SF · ADD) ...where: SF is the oral carcinogenic slope factor and for As, it is equal to 1.5 mg/kg·day. Results and Discussion Quality of Groundwater The quality of groundwater ...
    ... Occurrence in Groundwater of Srem District The Srem District of Vojvodina features groundwater of good quality, with arsenic concentrations falling within the allowed range and 77% of samples having arsenic concen- trations below 10 µg/L (Fig. 5). The most frequent causes of physicochemical non-compliance ...

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction
    ... determining, the age of this spring, was of great importance for defining, the conditions of groundwater formation and the depth of groundwater circulation. The thermal spring is located at a distance of about 50 m from the cold Krupaja Spring; it emerges at an altitude of 215 m above sea level ...
    ... summer and autumn period of 2015 shows high groundwater age, that is, it excludes the intrusion of fresh water, which may be a consequence of the small amount of water that infiltrated into the system during the spring, period of 2015 (explaining the difference in the maxima of 2014 and 2015). In ...
    ... conditions of the Creative Commons Attribution (CC BY) license (https:/ / creativecommons.org//licenses/by/ 4.0/). Faculty of Mining, and Geology, University of Belgrade, Djusina 7, 11000 Belgrade, Serbia; sasa.milanoviceorgf.bg.ac.rs Faculty of Civil Engineering, University of Belgrade, Bulevar ...

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... (2011) Modelling of changes of hydrodynamic conditions in the aquatic environment of the Maczki-Bór sand pit due to the fact of planned closure of mining operations (NE part of Upper Silesian Coal Basin - Poland). In: RÜDE R. T., FREUND A. and WOLKERSDORFER, CH. (eds.) Proceedings of the 11th Int ...
    ... strongest link of the Electric Power Industry of Serbia. Since World War II, it has produced more than 580,000,000 tons of coal. Every other kilowatt in Serbia comes from KCB’s lignite (brown coal). A daily extraction rate of as much as 100,000 tons of coal ensures reliable operation of the thermal power ...
    ... management of groundwater sources in intergranular porous media. Belgrade: University of Belgrade, Faculty of Mining and Geology. POLOMČIĆ, D. (2002). Schematization types of hydrogeological system for setting up the hydrodynamic model. In: Proceedings of the XIII Yugoslav symposium of hydrogeology ...

  • Model of the Geomagnetic reference field of the Republic of Serbia

    Spomenko J. Mihajlović, Vesna Cvetkov (2024)

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... investigation of quality in terms of the possibility of use has not yet been conducted. Although some indi- vidual limestone quarries have deposits of more than a million cubic metres, with the potential production capac- ity of approximately 10,000 m* of blocks and 15,000 m? of panels per year ...
    ... Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, this research is primarily concerned with the examination of their petrological and physico-mechanical properties ...
    ... appearance and the decorative quality of the limestone (Fig. 2c). The amount of CaCOy in these limestones is high, from 97.46 to 99.96 %, and with a mean value of 98.76 %, they belong to pure limestones. With regards to textural features, coarseness and type of allochem, these limestones correspond ...

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method
    ... composition is composed of the following chemi- cal components: SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, S, Na2O and K2O. Results of laboratory tests show that fly ash and slag have variable chemical, mineralogical and physical properties that are dependent on the natural composition, quality of coal from basin ...
    ... composition and quality of coal for each specific coal basin, – dependencies between the chemical, mineral and physical properties make a good basis for predicting and solving- specific technological and ecological problems related to the use of ash and slag, – using different types of coal from Kolubara ...
    ... – Association of Civil Engineers and Technicians of Serbia, Belgrade. SRPS B.H8.359 (1973): Methods of analysis of coal and coke – Determination of chem- ical composition of fuel ash – General requirements. SRPS B.H8.360 (1973): Methods of analysis of coal and coke – Determination of silica (SiO2) ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... siderably, the quality of run of mine (ROM) coal composite will depend on both the quality and quantity of coal mined from each active bench. If it is desired to control the ROM coal quality, the rate of coal production from each active bucket wheel excavator (BWE) should be regulated. The effect of this approach ...
    ... Therefore, we de- scribe prediction of the performance of stock- piling systems for which reclaim slices include unequal amounts of material from the layers of material stacked, fig. 3. Quality of the reclaimed material is calcu- lated as the weighted average of pieces of the layers that are taken from the ...
    ... the layers of material stacked, fig. 3. Quality of the reclaimed material is calcu- lated as the weighted average of pieces of the layers that are taken from the bed. In this calcu- lation, each piece's quality is weighted by its volume. More precisely, let Xij be the average grade of the material ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... effect of elastic seismic wave is movement of particles of the rock mass from its equilibrium position. Such oscillation of the rock mass particles is manifested as a shock and represents one of the negative effects of blasting. In order both to evaluate and control the seismic effect of blasting ...
    ... velocity of the rock mass and basic parameters affecting its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock mass and the type of blasting, it is the equation of M. A. Sadovski that is used most commonly. In this paper, the law of Sadovsky ...
    ... quotient of the relationship between relative growth of oscillation velocity of the rock mass and relative growth of reduced distances. Thereby, in a marginal case, a differential equation, whose general integral overlaps with the law of Sadovski, is obtained. Parameters n and K in the law of Sadovsky ...