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Упит dcterms_subject_txt:Geochemistry and Petrology

2431 items

  • Knowledge Graphs in the Era of Large Language Models: Opportunities and Challenges

    Danka Jokić, Ranka Stanković, Jelena Jaćimović (2024)
    Pojava velikih jezičkih modela (eng. Large Language Models ili LLMs) je značajno uticala na oblast veštačke inteligencije, naročito u oblastima obrade prirodnog jezika i generisanju teksta. Međutim, ključno ograničenje ovih modela leži u nedostatku strukturiranog znanja i sposobnosti zaključivanja, što otežava njihovu primenu u stvarnom svetu, gde se zahteva tačnost iznetih činjenica i zaključivanje na osnovu konteksta. S druge strane, grafovi znanja nude primamljivo rešenje. Oni pružaju bogat izvor strukturiranog znanja, tako što predstavljaju entitete i njihove relacije u ...
    grafovi znanja, veliki jezički modeli, obrada prirodnog jezika, strukturirano znanje, kvalitet podataka, objašnjiva veštačka inteligencija, bezbednost sadržaja na internetu

  • Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US

    Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić (2023)
    Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...
    CO2, емисија, угаљ, термоелектрана, САД, ЕУ-27
    ... regions and sectors. CO> emissions increased in North America and Asia (excluding the People's Republic of China), to a greater extent than emissions reductions in Europe and China. At the global level, CO>» emissions from electricity generation and the transport sector increased by 261 Mt and 254 ...
    ... air, soil, and water. Sector of production and use of coal also provides Jobs to around 230.000 people in mines and power plants across 31 regions and 11 EU countries [8]. Table 1. The US coal consumption in 2021 [6] Electric power | Industrial total | Commercial | Residential and transportation' ...
    ... led by increased Asian market and economic development. Global demand for electricity increased by 2.7% [4]. This paper analyzes production and emissions of CO in sector of electricity in two big worlds region - EU-27 and US. The emission of CO> in EU-27 and US in last 30 years are anatomized ...

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... open track tracks and main tracks on main railways Ev2 > 80 MN/m2, Ev2/ 5 MN/m2, Rc* for the construction and improvement of open railway tracks and main tracks on regional railways Ev2 > 60 MN/m2, Ev2/Ev1 m2, Rc* for the construction and improvement of tracks on local railways and secondary tracks ...
    ... the standard and technical conditions (harmonized with the standard) determine in examination process the zone where soil homogeneity is ensured (by granulometric composition and moisture) and in statistically reliable research conditions. Perform the necessary tests and correlations and, based on them ...
    ... of the protective layer is 20 cm, and in the case of thickness > 30 cm it is installed and compacted in two layers. Load-bearing capacity at the level of the railway planum meets the following requirements: for the construction and improvement of open track tracks and main tracks on main railways Ev2 ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • 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

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... ropalaeontological, magnetostratigraphic and · geochemical methods. The Dedina section yields rich and diverse associations of macrofauna represented by cephalopods (ammonites, aptychi and belemnites), brachiopods, and bivalves. Among the most frequent and diverse are ammonites. The current study ...
    ... Besnosov and Mikhailova (1991), Wright et al. (1996), Kvantaliani et al. (1999), Klein (2005), Arkadiev and Bogdanova (2004, 2005), Bogdanova and Arkadiev (2005), Arkadiev and Bogdanova (2012), Arkadiev (2014), Bulot et al. (2014), Frau et al. (2016a,b), Hoedemaeker et al. (2016), and Szives ...
    ... tional deposits between the Tithonian and Berriasian and, according to Arkadiev and Bogdanova (2012), from the lower Ber- riasian (Jacobi Zone) of Crimea, Bulgaria, Romania, Austria, France, and Spain. Occurrence. Light grey marlstones of layers 80 and 96. Pseudosubplanites subrichteri (Retowski ...

  • Improvement of education through the cooperation between CEEPUS EURO Geo-Sci network and scientific projects: examples from UB-FMG

    Kristina Šarić, Dejan Prelević, Miloš Marjanović, Uroš Stojadinović, Vladimir Simić (2024)
    CIII-RS-0038, Recon Tethys, DEMONITOR, TMCmod, REASONING

  • Towards a Mining Equipment Ontology

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)

  • A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor

    Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić (2023)
    železnica, prekogranični teretni saobraćaj, ARIMA, LSTM, SSA

  • 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

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin

    Balázs Németh, Gábor Tari, Gábor Bada, Dejan Radivojević, Bruno Tomljenovic, Csaba Krézsek (2018)
    нафтна геологија, геотермална енергија, Панонски басен
    ... e (Horvath et al. and Gúthy et al.) to local-scale (Loisl et al.) structural evolution of the basin, petroleum geology and systems (Lember- kovics et al., Cvetković et al., Ivanišević and Radivojević, and Rotár-Szalkai et al.), geothermal energy (Macenić and Kurevija) and CO2 storage (Vulin ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration ...
    ... south and by the Southern and Eastern Alps from the west. The basin hosts several hydrocarbon systems that are located within the very complex system of extensional subbasins within the main basin. One unique aspect of the Pannonian Basin is that it is underlain by anomalously thin crust and lithosphere ...

  • Joint interpretation of paleomagnetic, structural and AMS results from the Vardar Zone of Serbia

    Emo Marton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov (2021)
    ... structural and AMS results from the Vardar Zone of Serbia EMŐ MÁRTON1, MARINKO TOLJIĆ2, VESNA LESIĆ3 and VESNA CVETKOV2 1 – Mining and Geological Survey of Hungary, Paleomagnetic Laboratory, Columbus 17-23, H-1145 Budapest, Hungary, paleo@mbfsz.gov.hu 2 – Faculty of Mining and Geology, ...
    ... tic, structural and AMSresults from the Vardar Zoneof Serbia EMO MARTON', MARINKO TOLJIĆ?, VESNA LESIĆ? and VESNA CVETKOV? ] – Mining and Geological Survey ofHungary. Paleomagnetic LaboFatony, Columbus 17-23, H-1145 Budapest. Hungary, paleo'a.mbfsz.gov.hu 2 Faculty ofMining and Geology. University ...
    ... localities /sites from the Western and from the Eastern Vardar zones, respectively. From these zones Upper Cretaceous sediments and Oligocene-Lower Miocene igneous rocks were studied. The Sava Zone is represented by 16 Upper Cretaceous localities, where marls and marly limestones were collected. ...

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija
    ... basic household data, current heating system characteris- tics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main barriers and drivers for a successful energy transition in the future. The ...
    ... analysis of perspectives for energy savings and GHG reduction is a challenging endeavor. It requires the investigation of a wide range of barriers and drivers for reducing the environmental and climate impact, as well as for rising consumer efficiency and awareness in the consumption phase [4]. Occupant ...
    ... fuels - Type of heating system and basic characteristics - Heating system age - Monitoring and control of energy consumption P3 Households’ perceptions and attitudes - Thermal comfort - Willingness to pay for a more sustain- able individual heating system - Barriers and drivers - The priority of criteria ...

  • Method validation and geochemical modelling of chromium speciation in natural waters

    Piotr Rusiniak, Katarzyna Wątor, Ewa Kmiecik, Vesna Ristić Vakanjac (2024)
    The study focuses on validating reference methods such as ICP-OES and ICP-MS for detecting ultratrace levels of chromium in groundwater, where concentrations are typically very low. Additionally, it verifies a hyphenated technique, IC-ICP-MS, for determining naturally occurring Cr(VI) in tested waters. The validation process involved various chromium analysis variants, including isotopes 52Cr and 53Cr in ICP-MS and IC-ICP-MS techniques, along with specific emission lines in the ICPOES technique. Statistical data processing revealed that the achieved limits of quantification for ...
    шестовалентни хром, ИЦ-ИЦП-МС, технике са цртицама, геохемијско моделирање, анализа спецификација, валидација методе

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori
    ... derivates of β-113 diketones and diamines (Table 1). They contain etan-1,2-diamine or propane-1,2-diamine as 114 amin part and pentane‐2,4‐dion and/or 1‐phenylbutane‐1,3‐dione, pentane‐2,4‐dione and/or 115 1,1,1‐trifluoropentane‐2,4‐dione and 1,1,1‐trifluoro-pentane‐2,4‐dione and/or 1‐phenylbutane‐116 ...
    ... ing groups, and have interesting properties such as catalytic 96 activity, ability to reversibly bind oxygen, transfer of amino group, antibacterial, and 97 antifungicidal activities (Dugas H and Penney C. 1981; Jones, Summerville, and Basolo 1979; 98 Mohamed GG. 2006; Olive GH and Olive S. 1984; ...
    ... . Statistical calculations 164 and Pearsons correlations, were done using the NCSS statistical package (Hintze 2001). Bate-165 Smith and Westall equation was used for calculation of RM values (Bate-Smith and Westall 166 1950). 167 168 169 Results and discussion 170 171 Determination ...

  • Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One

    Nemanja Stanić, Dragoslav Rakić, Josip Isek, Slavoljub Simić (2024)
    In order to solve serious traffic congestion in Belgrade, a number of studies regarding the Belgrade Metro construction have been carried out since 1973. However, only in 2019, the routes of the future metro lines 1 and 2 were defined as a part of the General Metro Construction Project. The lines are designed to intersect at the location of Sava Square, where an interchange metro station will be built. It represents a complex geotechnical structure consisting of three different ...
    metro station, geotechnical modelling, displacements

  • Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine

    Predrag Lazić, Đurica Nikšić, Rudolf Tomanec, Dušica Vučinić, Lidija Cvetićanin (2020)
    У раду је приказан део резултата обимних индустријских испитивања утицаја финоће млевења руде на резултате флотације минерала олова, бакра и цинка из руде рудника "Рудник". На основу резултата индустријских испитивања, констатовано је да се при једностепеном млевењу и двостепеном класирању комплексне Pb-Zn-Cu руде, појављује проблем тзв. диференцијалне мељивости. Наиме, галенит као мек минерал знатно брже се уситњава од осталих минерала у руди. Ово доводи до тога да минерал галенит прелази у ситне класе које споро флотају, а у ...
    флотабилност халкопирита, диференцијална мељивост, флотација, рудник
    ... selectivity between copper and zinc minerals. Only 20% of chalcopyrite is in fractions which are suitable to flotation (in range 18—74 nm). Ore specimen 31 (coarse fractions). Chalcopyrite is the most present mineral and pyrrhotite, marmatite and galena follow. Cubanite, vallerite and covellite are present ...
    ... L., Mainza, N., Becker, M., and Wiese, G., Using Mineralogical and Particle Shape Analysis to Investigate Enhanced Mineral Liberation through Phase Boundary Fracture, Powder Techmology, 2016, no. 301, pp. 794—804. 6. Venkataraman, S. and Fuerstenau, F., Kinetic and Energy Considerations in Mixture ...
    ... milling and classifying, efficiency in flotation plant of the Rudnik mine, and the validity of one-stage copper rough concentrate cleaning technological scheme option [11—13]. Determination of particle size distribution of lead underflow (input in copper flotation), copper concentrate and copper ...