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Упит dcterms_subject_txt:variability of coal quality

2855 items

  • Coal production in Serbia, the social aspects and making strategic decision support

    Beljić Čedomir, Ristović Ivica, Gligorić Zoran, Gluščević Branko, Tomašević Aleksandra (2013)

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... s, blending of knowledge and establishing a continuity of knowledge acquisition still represents a challenge that needs new approaches and tools to be developed. Technology-enhanced learning (TEL) relies on information technology (IT) to offer support in improving the quality of learning and ...
    ... will have access to state of the art high quality academic courses and thus continue with their professional development in a way more suitable to their professional activities than that of the traditional life-long learning programs. By blending these two types of knowledge within one technological ...
    ... and enhancement of relations between the academia and the enterprises and integration of creative research potential with industry and academic institutions. The second objective within our project is to develop and implement guidelines and procedures for quality assurance of OER in WB according ...

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... limit the depth of the analysis and may not capture the full complexity of dynamic interactions within the economy. For a more detailed understanding of the effects, this methodology would need to be coupled with additional analyses that consider the variability and interdependence of other factors ...
    ... responsible for the distribution of electricity (Energy Agency of the Republic of Serbia, 2023). Coal and hydro are the primary energy sources on which the elec- tricity sectors in the region rely (Franki and Visković, 2021). Currently, coal accounts for 70% of electricity in the Western Balkans ...
    ... Utilities Policy 91 (2024) 101855 Table 1 Total electricity production in 2022 (Statistical Office of the Republic of Serbia, 2023). Energy source Produced electricity (GWh) Share (%) Coal (lignite) 23459.7 66.06% Natural gas and fuel oil 1656.7 4.67% Hydro 9274.4 26.12% Wind 949.4 2.67% ...

  • The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia

    Branislav Petrović (2023)
    The epikarst as a part of the karst aquifer represents a complex point of contact and mixing of unconsolidated material from the terrain surface, carbonate rocks altered by “corrosive” water, flora and fauna (and remains of), which is partially saturated with groundwater. Significant amounts of (plant accessible) water, and other solutes and particles, can be stored in this zone for extended periods of time. Thus, attenuation or biochemical processes could start in this layer and change quality of infiltrated ...
    epikarst, tracer test, shallow cave, Suva Planina Mt., Serbia

  • A proposal for the landslide damage questionnaire in suburban areas

    Uroš Đurić, Biljana Abolmasov, Miloš S. Marjanović, Sanja Jocković, Miloš D. Marjanović (2022)
    Landslides are one of the most often natural disasters that have an extensive impact on society including loss of life, destruction of infrastructure and properties, damage to land and loss of natural resources. Landslide losses can significantly vary and they depend on a variety of different criteria such as the size and type of landslide, lithological setting of terrain, the terrain slope gradient, the quality of materials used for construction, and the construction typology. Damage from landslides is usually ...
    istraživanja, objekti, klizišta, rizik, procena

  • 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

  • Mathematical modeling to define catchment size and real evapotranspiration (case study: Andrića karst spring, Western Serbia)

    Marina Čokorilo Ilić, Vesna Ristić Vakanjac, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković, Bojan Hajdin (2018)
    Water resources in karst are extremely important sources of drinking water supply. The quality of groundwater formed in karst aquifers is generally high and in most cases only chlorination is required. However, from a hydrogeological perspective, these water resources are the least studied. Often only basic information is available on catchment size, groundwater reserves (dynamic and static, if any) and groundwater balance. Detailed hydrogeological investigations and long-term monitoring of karst spring discharges are needed to acquire such information. In ...
    karstno vrelo, veličina sliva, stvarna evapotranspiracija, karstno vrelo Andrića

  • Effects of bentonite binder dosage on the properties of green limestone pellets

    Vladimir Jovanović, Dinko Knežević, Živko Sekulić, Milan Kragović, Jovica Stojanović, Slavica Mihajlović, Dragana Nišić, Dragan Radulović, Branislav Ivošević, Milan Petrov (2016)
    This paper presents the results of tests carried out to determine how the dosage of bentonite added as binder, affects the properties of green pellets made of the limestone fines that originate from Lithothamnium limestone processing. Bentonite was added to limestone in different mass fractions (1, 2.5, 5 and 10%), whereas all the other parameters of the pelletizing process remained constant. The aim of pelletizing was to consolidate limestone fines and form mechanically stable pellets, provided that all the ...
    Lithothamnium limestone, bentonite, pelletizing, pelletizing plate, green pellet testing

  • The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia

    Branislav Petrović (2022)
    The epikarst as a part of the karst aquifer represents a complex point of contact and mixing of unconsolidated material from the terrain surface, carbonate rocks altered by “corrosive” water, flora and fauna (and remains of), which is partially saturated with groundwater. Recharge of karst aquifers, usually, occurs via the unsaturated zone which uppermost part could be epikarst zone. Significant amounts of (plant accessible) water, and other solutes and particles, can be stored in this zone for extended periods ...
    epikarst, tracer test, shallow cave, Suva Planina Mt., Serbia

  • Towards translation of educational resources using GIZA++

    Ivan Obradović, Dalibor Vorkapić, Ranka Stanković, Nikola Vulović, Miladin Kotorčević (2016)
    ... evaluate the quality of the translation and formulate suggestions for the improvement of the rest of the translation. The translation needs several reviews before publishing or preparation for voice recording. [10] A Computer Aided Translation (CAT) Tool is based on collection of aligned sentence ...
    ... lectures, Coursera with translation partners is producing high-quality education accessible to anyone, anywhere – regardless of what language they speak. 3. TRANSLATION OF EDUCATIONAL RESOURCES - CURRENT APPROACHES For translation of eLearning resources both language translation, and eLearning ...
    ... Bosch, K. Kermanidis, V. Sosoni, K. Cholakov, I. Hendrickx and M. Huck, “Enhancing Access to Online Education: Quality Machine Translation of MOOC Content”, Proceedings of the 10th edition of the Language Resources and Evaluation Conference, , Portorož, Slovenia, May 2016 [3] TraMOOC H2020 Project ...

  • Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)

    Dejan Radivojević, Ljupko Rundić (2017)
    ... area of interest represents the most attention-grabbing part of Pannonian Basin in Serbia due to its hydrocarbon potential as well as for complex geology and presence of deepest depressions. °e hydrocarbon exploration in this area is almost 70 years old which led to large amount of high quality data ...
    ... the most attention-grabbing part of Pannonian Basin in Serbia due to its hydrocarbon potential as well as for complex geology and presence of deepest depressions. The hydrocarbon exploration in this area is almost 70 years old which led to large amount of high quality data. At the other side, still there ...
    ... diatom associations of the Black Sea have more than 30% of the species known in the Sarmatian and more than 20% the common ones with Maeotian. °erefore, the study of the ecological distribution of modern diatoms of Black Sea provides an opportunity to understand the ecology of the Neogene Euxin basin ...

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... European trend of exchanging data on the basis of uniform criteria for separation, harmonization and improvement of the results achieved. The positive side of this kind of data archiving, is that it ensures that the data are archived, accessible and harmonized. It enables the comparison of data from ...
    ... European trend of exchanging data on the basis of uniform criteria for separation, harmonization and improvement of the results achieved. The positive side of this kind of data archiving, is that it ensures that the data are archived, accessible and harmonized. It enables the comparison of data from different ...
    ... ty of metadata is developed a multilingual terminology database. Each participating country, or national data provider, has received a list of terms in English which was translated into the native language of one-to-one, so that the integration of all possible paired terms describes sets of data ...

  • Ocena zaštitne funkcije povlatnih slojeva izvorišta Jasik (Opština Batočina) primenom GLA metode

    Rastko Petrović, Igor Jemcov, Dušan Polomčić (2014)
    U cilju utvrđivanja rezervi podzemnih voda i analize uslova zaštite u periodu 2012. i 2013. godine, sprovedena su detaljna hidrogeološka istraživanja na području izvorišta Jasik (opština Batočina). Uspostavljen je sistem monitoringa, čiji je rezultat predstavljao prikupljanje detaljnih hidrogeoloških podataka. Za potrebe analize, izrađen je hidrodinamički model, na osnovu koga je simulirano kretanje podzemnih voda, odnosno, utvrđene zone sanitarne zaštite. Pored navedenog, za potrebe utvrđivanja uslova zaštite podzemnih voda, bilo je neophodno utvrditi podložnost aluvijalne izdani izvorišta Jasik zagađenju. Polazeći ...
    Izvorište Jasik, GLA metoda, zaštita podzemnih voda

  • Optimizacija vodosnabdevanja podzemnim vodama u Srbiji

    Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2012)
    ... artificial replenishment. The amount of water gained through the application of artificial infiltration together with the estimated renewable groundwater reserves amounts to a total of 107 m 3 /s of quality groundwater. The summary of the status of the quality and protection of groundwater within specific ...
    ... artificial replenishment. The amount of water gained through the application of artificial infiltration together with the estimated renewable groundwater reserves amounts to a total of 107 m/s of quality groundwater. The summary of the status of the quality and protection of groundwater within specific aquifer ...
    ... investigated in spite of its intensive usage (it is used by approximately 75% of the population). Based on hydrogeological investigations published until now, around 30% of the renewable groundwater reserves is being used of the estimated 67 m 3 /s. The work presents the reserves and state of the current ...

  • Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Katarina Nestorović (2021)
    U datom eksperimentalnom radu su termografskim metodama ispitivane termofizičke karakteristike različitih materijala. Za ispitivanja su izabrani mesingani niovčić, ugalj i pelet, jer imaju različita termoizolaciona svojstava i različito stanje površine. Uzorci su najpre hlađeni, a zatim je njihovo zagrevanje na sobnoj temperaturi praćeno termalnom kamerom. U drugom delu eksperimenta, korišćena je impulsna termografija, a zagrevanje površine uzoraka vršeno je svetlosnom pobudom.
    termografija, impulsna termografija, nedestruktivno testiranje materijala, mesing, ugalj, pelet

  • Density maps from gravity inversion as a tool for the basin basement analysis and imaging

    Ivana Vasiljević (2023)
    Previously devised method for density mapping of the Cenozoic basin’s basement is further developed in order to improve the visualization and geological interpretation of the results. The method combines gravity-density inversion with forward modeling and requires gravity anomaly and depth-to-basement data. Although it was primarily designed for application in well-researched basins, such as Pannonian basin, method does not require further constrains. An information on density distribution in the Cenozoic sediments (from density logging or core density measurements) is important ...

  • Hidrodinamički proračun zaštite površinskog kopa Drmno od podzemnih voda u periodu 2018-2022. godina

    Dušan Polomčić, Tomislav Šubaranović, Zoran Stojićević (2019)
    Površinski kop lignita Drmno nalazi se u blizini velikih reka (Dunav i Mlava), zbog čega eksploatacija otkrivke i lignita u velikoj meri zavisi od sistema zaštite od podzemnih voda. Ukoliko je sistem zaštite od podzemnih voda dobro isplaniran, a njegov kapacitet dobro proračunat, onda će se eksploatacija obavljati u suvoj sredini, što podrazumeva sigurnu proizvodnju otkrivke i lignita. U današnje vreme uz primenu adekvatnih softvera olakšano je kvalitetno planiranje i proračunavanje sistema za zaštitu površinskih kopova od podzemnih voda. ...
    odvodnjavanje, podzemne vode, površinski kop, lignit, Drmno

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... exception of a stimulating effect (feeling of quality living) can lead to a reduction in the costs of waste collection. On the example of this landfill in Cacak, it has been shown that a very important role in the arrangement of facilities with accompanying equipment has the results of geotechnical ...
    ... operating costs. From the aspect of local self-government, the way of waste treatment is being improved, a certain number of workers of lower social status are employed and a positive economic effect is achieved. From a citizen's perspective, the introduction of a quality organization into the waste ...
    ... press-containers, most of the manipulative plateau, part of the waste disposal boxes, the waste selection hall, the whole recycling yard) are directly dependent on the characteristics of waste in this part of the landfill. It is well known, however, that waste is a very poor quality primarily due to: ...

  • Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM

    Stevan Djenadic, Milos Tanasijevic, Predrag Jovancic, Dragan Ignjatovic, Dejan Petrovic, Ugljesa Bugaric (2022)
    The risk assessment of engineering systems represents an important part of the quality of service and dependability. The existing methods for risk evaluation use crisp sets for rating partial indicators’ proposition and their cumulative products as an overall indicator. In this paper, existing FMEA and FMECA methods have been improved using the fuzzy expert system for calculating the risk priority number. The application of fuzzy logic allows the use of linguistic descriptions for risk analysis. In this way, the ...
    rizik, inženjerski sistemi, fazi logika, višekriterijumske metode

  • The state and perspective of the natural gas sector in Serbia

    Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević (2016)
    The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...
    Consumption, natural gas, scenarios of development