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Упит dcterms_subject_txt:Earth-Surface Processes

360 items

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... the ResNet software package The object-oriented approach in system structuring and modeling was used as the strategy for defining the model of processes and data in the development of INVENTS. In this paper UML (Unified Modeling Language), as a standard language for visualization, specification, ...
    ... to obtain efficient communication between the symbolic and the numerical part of the system. In order to cope with this problem a separation of processes in coupled systems into independent modules is suggested. Furthermore, information interchange, i.e. communication among modules, is strictly ...

  • Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина

    Aлександар Додеровић (2024)
    Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...
    оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритам

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts.

    Dejan Prelević, Ana Mladenović, Violeta Gajić, Milena Dunčić, Blažo Boev (2024)
    Tethys closure, Scaglia Rossa, intracontinental basalts
    ... references therein). This orogenic system arose from thc closure of the northern branch of the Neotethys Ocean and subsequent collision-related processes. Key questions revolve around the timing of thc Neotethys closure and the onset of the Europce- Adria collision. One hypothesis suggests this ...

  • Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data

    Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković (2024)
    geochronology, zircon, provenance
    ... n about the timing of the origin of lithologies in a source area, which has often been destroyed and recycled during preceding plate tectonic processes. Our research was conducted in two phases. In the first phase, we analyzed zircons from the main lithological units of the basement, while in ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... uranium and low concentrations of thorium, while igneous rocks have lower concentrations of uranium and higher concentrations of thorium and rare earth elements (Moreira et al., 2018). The concentration of ŠO varies according to the mineral origin, from 260 to 1860 Bq kg for apatite and from 460 ...
    ... Atomic Radiation, New York, NY, USA, 659 pp. Walawalkar M., Nichol C.K. & Azimi G. (2016) Process investigation of the acid leaching of rare earth elements from phosphogypsum using HCI, HNOy,, and H,SSO,. Hydrometallurgy, 166, 195–204. Zhou J., Sheng Z., Li T., Shu Z., Chen Y. & Wang Y. (2016) ...
    ... al., 2016). The commercial use of phosphogypsum in the areas of agricul- ture, road construction, the cement industry and the manufactur- ing processes of other building materials is limited by the presence of the significant quantities of natural radionuclides, such as U, Ra and Th (Pćrez-Lopez ...

  • Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders

    Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)
    ... synthesis. During photocatalytic · testing nanostructured material CopoHoo,MoOu indicated the possibility of a promising solution in photocatalytic processes towards green chemistry and sustainable development. 1. M. Rosić, A. Zarubica, A. Šaponjic', B. Babić, J. Zagorac, D. Jordanov, B. Matović, ...

  • 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
    ... As a result of the interruption of blood flow and neural processes occurring, pathological changes in heart, liver, intestines, kidneys, skin, and nails occur. Arsenic is a pro- toplasmic poison with a pronounced effect on oxidative processes in the cell. Inorganic As(III) and As(V) are the main forms ...
    ... is especially important to determine the source and mobility of arsenic in groundwa- ter. Its mobility depends on the highly-complex geochemi- cal processes that take place in the aquifer. An anoxic state of groundwater increases arsenic mobility [14]. Based on a review of different literature sources ...
    ... Croatia, while to the north and northeast the South Pannonian Basin (Vojvodina) is bordered by Serbia’s state frontiers with Hungary and Romania. The surface area of Vojvodina is 21,506 km2 and its population is about two million. The test area, where arsenic concentrations in groundwaters were analyzed ...

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... services are increasing less provided. Soil degradation may be defined as a group of processes caused by human activity, which prevent present and future capacities of soil as a condition for survival of life on Earth (SEPA 2009). Once the functions and quality of the soil are impaired, its regeneration ...
    ... Mihailovic et al. 2014b). Contaminated soils contain large amounts of toxic metals in the surface layer, and one of the most important reasons for this is the insufficient time for the pedogenetic processes to realize their displacement and distribution into the deeper layers of the soil (Kabata-Pendias ...
    ... of a plant considers processes of photosynthesis and later transformations of glucose into polysaccharides, that is, its demolishing through glycolysis and forming of amino acids (later proteins) and fatty acids (later lipids). The basic metabolic processes, the processes of primary metabolism ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • Project REASONING: Characterization and technological procedures for recycling and reusing of the rudnik mine flotation tailings

    Vesna Cvetkov, Vladimir Simić, Stefan Petrović, Filip Arnaut, Milena Kostović, Dragan Radulović, Jovica Stojanović, Vladimir Jovanović, Dejan Todorović, Nina Nikolić, Jelena Senćanski, Grozdanka Bogdanović, Dragana Marilović (2024)

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... 016-0689-3 HE, Y.P. & BEIGHLEY, R.E. (2008): GIS-Based Regional Landslide Susceptibility Mapping: A Case Study in Southern California.– Earth Surface Processes and Landforms, 33, 380–393. doi: 10.1002/esp.1562 HERVÁS, J. (2007): Guidelines for mapping areas at risk of landslides in Europe.– In: ...
    ... Hazards Earth Syst. Sci., 2, 3–14. doi: 10.5194/nhess-2-3-2002 BARREDO, J.I., BENAVIDES, A., HERVÁS, J. & VAN WESTEN, C.J. (2000): Com- paring heuristic landslide hazard assessment techniques using GIS in the Tirajana basin, Gran Canaria Island, Spain.– International Journal of Applied Earth Observa- ...
    ... y maps in Jinbu area, Korea.– Environmental Earth Sciences, 67/ 1, 23–37. doi: 10.1007/s12665-011-1477-y LIN, L., LIN, Q., & WANG, Y. (2017): Landslide susceptibility mapping on a global scale using the method of logistic regression.– Nat. Hazards Earth Syst. Sci., 17, 1411–1424. doi: 10.5194/nh ...

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... north @ Springer 6188 Environ Earth Sci (2015) 73:6181–6193 Fig. 4 Weathering: forms on the Dark Gate: a relief, b surface recession and granular disintegration, c remains of black crust, discoloration and detachment of crusts with stone material, d Surface recession, flaking and granular ...
    ... blocks showing very slight damage; 8 % of the surface @ Springer with very slight damage on the south facade did not change in 2014, comparing to the north one. On the north facade slight damage was present on only 3 % of the surface in Environ Earth Sci (2015) 73:606181–6193 South facade in ...
    ... the Dark Gate in correlation to damage category Environ Earth Sci (2015) 73:6181–6193 Group Loss of stone material Discoloration/deposits Detachment Fissures/deformation Main weathering forms Damage category || 2 3 4 5 Surface recession Intensity of decay Depth (cm) <02 0.2-—05 · ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... calculations. Energietechnik 1953, 3, 309–316. 59. Tsiamis, D.A.; Castaldi, M.J. Determining Accurate Heating Values of Non-Recycled Plastics (NRP); Earth Engineering Center City, University of New York: New York, NY, USA, 2016; pp. 18–19. 60. Jamradloedluk, J.; Lertsatitthanakorn, C. Characterization ...
    ... lignite alone. On the other hand, data obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic thermal processes for polymer recycling. However, concerning the huge amount of produced HDPE, at least part of this plastic material can be reused for advanced thermal ...
    ... lignite alone. On the other hand, data obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic thermal processes for polymer recycling. However, concerning the huge amount of produced HDPE, at least part of this plastic material can be reused for advanced thermal ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... rod (see Figure 3.2 - graph b). If the stroke and load of the smooth rod are recorded at the surface using a mechanical-hydraulic dynamometer, a surface dynamogram is obtained. The shape of the surface dynamogram depends on all factors 15 influencing the occurrence of dynamic loads, making it ...
    ... downhole dynamometric card. Examples of these patterns for operating conditions on surface and downhole dynamometric cards are shown in Figure 6.1. Line card Noise card Surface card Dovmnhole card Downhole card Surface card 6000 4000 ~ı M\ s s a) š 2000 0 5 10 15 20 25 30 b) š -4000 WAAWF@@JW{ ...
    ... Rotaded card Surface card Dovwnhole card Surface card Downhole card c) Lo ad (I b} o — Lo ad (Ib} ) [-] 8 Š } [[ (3} 0 30 40 50. Polished rod position (in} Polished rod position (in} 42 Figure 6.1. Examples of patterns for operating conditions on surface and downhole ...

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... As a result of the interruption of blood flow and neural processes occurring, pathological changes in heart, liver, intestines, kidneys, skin, and nails occur. Arsenic is a pro- toplasmic poison with a pronounced effect on oxidative processes in the cell. Inorganic As(III) and As(V) are the main forms ...
    ... is especially important to determine the source and mobility of arsenic in groundwa- ter. Its mobility depends on the highly-complex geochemi- cal processes that take place in the aquifer. An anoxic state of groundwater increases arsenic mobility [14]. Based on a review of different literature sources ...
    ... Croatia, while to the north and northeast the South Pannonian Basin (Vojvodina) is bordered by Serbia’s state frontiers with Hungary and Romania. The surface area of Vojvodina is 21,506 km2 and its population is about two million. The test area, where arsenic concentrations in groundwaters were analyzed ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... partners’ networks both within the country and abroad. Thus ICT support is aimed not only at improving intra-business processes, but also at inter-enterprise business processes, in order to secure better performance and interoperability in business networks [11]. The concepts of enterprise ontology ...
    ... Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić | 13th International Symposium Continuous Surface Mining | 2016 | | http://dr.rgf.bg.ac.rs/s/repo/item/0001805 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава ...
    ... such as "coal mine", and "open pit", which is a specific type of coal mine, as well as synonyms relations, such as those between "opencast", "surface mine", and "quarry". One approach to development of mining ontologies has been reported in [5]. Some interesting results on ontology-based modeling ...

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

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... With regard to the topic of this paper, many researchers worldwide have addressed hydrogeologic systems of ore deposits, groundwater flow and processes that affect the hydrogeology of mining sites, including: Dimitrakopoulos et al. 2000; Rapantova et al. 2007; Kamkar-Rouhani, 2008; Rühaak et al ...
    ... Testing and Materials, 2014). According to Polomčić (2001), a hydrologic system is determined by: input elements, characteristics of the medium, processes that take place in the medium, and output elements, where the input and output elements are inter-dependent. The characteristics of a hydrogeologic ...
    ... areal spreads in planform and different, real thicknesses of the layers. The layers, from a hydrogeological perspective, viewed from the ground surface, are listed in Table 1. A hydrogeological model of the open-cast mine… 49 Table 1 Modeled flow field: lithologic members of the modeled ...