Претрага
946 items
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Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)
Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović. "Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)" in Carbonates and Evaporites, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s13146-019-00548-6
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Valorization of non-balanced coal reserves in Serbia for underground coal gasification
David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...... thermal energy balance participates close to 80%. Fossil fuels (solid, liquid and gaseous) are involved with 96%, while 4% are currently generated by renew- able energy sources [4]. In essence, the UCG process releases energy from coal layers located deeper un- derground, which are not economical ...
... lower than the natural gas. The price of natural gas is around 40 RSD/m?, which leads to: || C! =—-·10=4 RSD/mš 11 s —10 n q Revenue from the delivered amount of gas is: C. k =O,C,=29·10'm) ·4 RSD/m\, C,„ =983·10* e =983000 e (12) This price of the gas can also be corrected up to the 1/15 ofthe ...
... Vol. 23, No. 6B, pp. 4067-4081 4071 automatically formed in the same way, on the Gasification cavity shape using next third, fourth, etc., fig. 4, [7]. the traditional mothod In order for the gasification process to be performed more efficiently by the CRIP method, the mentioned half round ...David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić. "Valorization of non-balanced coal reserves in Serbia for underground coal gasification" in Thermal Science (2019). https://doi.org/10.2298/TSCI190725390P
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The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
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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. "Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia , Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
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Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања
Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић. "Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања" in Записници Српског геолошког друштва (2023)
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Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)
Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick. "Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)" in Geologica Carpathica, Central Library of the Slovak Academy of Sciences (2024). https://doi.org/10.31577/GeolCarp.2023.26
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Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis
... study was сагпед using mineral-rich coal, matrix coal and xylite-rich coal. Simulation ог matur:ty was performed by mild open system pyrolysis durnng 4 hours at the temperatures ог 400 "С (Pyr400). 450 *C (Pyr450) and 500 *C (Pyr500). This temperature range was chosen according (0 data from thermog ...
... (ТММЕ) and tetramethyinaphthalenes (TeMNr) slightly increase from Pyr400 to Pyr500. The same 15 тејајед to methylfluorene (МЕ) гано (2-+3-MF)/(1-+4-MF) and methyiphenanthrene (МР) index 3 (МРТ 3). However, maturity rattos., MFI 1 and МРТ 1 which contain unsubstituted aromatics (fluorene, phenanthrene) ...
... d non-hopanoid triterpeno1ds. AS — sterene: Вр. Ва апа a designate configurations at C,; and С шћорш DHC – dihydro-ar-curcumene: IPN – 2-methyl-1-(4'-methylpenty1). 6-isopropylnaphthalene МН – monoaromatic hopane; ОН – diaromatic hopane; TeNLH – tetranor-lupa-1,3,5(10), 6 8,11,13- heptaene; ТеН – ...Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović. "Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis" in 29th International Meeting on Ogranic Geochemistry, 1-6 September 2019, Gothenburg, Sweden , European Association of Organic Geochemists (2019)
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From post-disaster landslides inventory to open landslides data
Biljana Abolmasov, Miloš Marjanović, Uroš Đurić, Jelka Krušić. "From post-disaster landslides inventory to open landslides data" in Proceedings of 3rd European Regional Conference of IAEG/ Athens/ Greece/ 6-10 October 2021, International Association for Engineering Geology and the Environment (2021)
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Hidrodinamička analiza procesa starenja bunara sa horzontalnim drenovima na beogradskom izvorištu podzemnih voda
Đorđije M. Božović (2023)Predmet istraživanja doktorske disertacije su bunari sa horizontalnim drenovima beogradskog izvorišta podzemnih voda, drugog najvećeg izvorišta ovog tipa na svetu, čiji je režim rada opterećen procesima intenzivnog starenja prisutnog od samog početka formiranja izvorišta, početkom 1950‒ih godina. Istraživanja sprovedena u okviru izrade disertacije su imala za cilj definisanje nove metodologije izučavanja procesa mehaničkog i biohemijskog kolmiranja drenova izradom detaljnih 3D numeričkih hidrodinamičkih modela, upotrebom postojećih, dostupnih i široko rasprostranjenih računarskih programa. Istraživanja su realizovana simulacijom ostvarenog režima podzemnih voda ...modeliranje podzemnih voda, hidrauličke karakteristike drenova, koeficijent propusnosti drenova, prifilterska zona drena, hidraulički otpori na drenovima, kolmiranje drenova, ulazne brzine podzemnih voda, MODFLOW, CLN Package... Eh (mV) Ulazne brzine Vul max(m/s) RB‒5m 2,51 90,70 1,25 x 10-4 RB‒4m 1,65 78,58 1,25 x 10-4 RB‒6m 1,42 149,56 2,50 x 10-4 RB‒45 2,37 122,70 1,50 x 10-4 RB‒46 1,58 112,42 1,50 x 10-4 RB‒47 1,62 117,70 1,75 x 10-4 Primenom kriterijuma biohemijskog kolmiranja, dobijene su vrednosti ...
... x 10-6 1,0 x 10-5 1,0 x 10-4 1,0 x 10-3 1,0 x 10-2 2,5 x 10-9 2,5 x 10-8 2,5 x 10-7 2,5 x 10-6 2,5 x 10-5 2,5 x 10-4 2,5 x 10-3 5,0 x 10-9 5,0 x 10-8 5,0 x 10-7 5,0 x 10-6 5,0 x 10-5 5,0 x 10-4 5,0 x 10-3 7,5 x 10-9 7,5 x 10-8 7,5 x 10-7 7,5 x 10-6 7,5 x 10-5 7,5 x 10-4 7,5 x 10-3 U skladu sa ...
... u neposrednom okruženju bunara, da bi potom bio ispitan uticaj tri varijante sa dodatnom diskretizacijom. Analizirana su polja dimenzija 8 x 8 m, 4 x 4 m i 2 x 2 m u planu u zoni predmetnog bunara (slika 20). Poređenje diskretizacije prostora u užoj zoni bunara u profilu pravilnom i nepravilnom p ...Đorđije M. Božović. Hidrodinamička analiza procesa starenja bunara sa horzontalnim drenovima na beogradskom izvorištu podzemnih voda, Beograd : [Đ. Božović], 2023
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Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian
The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...... 118,238 117,529 819,360 101,830 101,177 Table 4: Training, development and test sets size distribution We were interested not only in the overall performance of developed taggers and models, but also in their perfor- mance for specific PoS-tags. Figures 4, 5 and 6 show the tagging precision per test ...
... 1633 .98 .98 .98 2854 .98 .98 .98 4562 .98 .98 .99 6016 DET .98 .99 .97 1031 .98 .99 .98 2007 .99 .99 .98 3343 .99 .99 .98 4731 INTJ .86 1 .75 4 .75 .75 .75 4 .8 .86 .75 8 .95 1 .91 11 NOUN .98 .99 .98 8738 .99 .99 .99 15973 .99 .99 .99 24873 .99 .99 .99 33344 NUM .99 .99 1 888 .99 .99 1 1994 1 1 1 ...
... the TreeTagger trained on the same dataset, as well as with a previous version of TreeTag- ger for Serbian (Utvić, 2011), and discussed in Section 4. The paper ends with concluding remarks and an outline of future work in Section 5. 2. Resources The main resources used for the production of the ...Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić. "Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian" in Proceedings of the 12th Language Resources and Evaluation Conference, May Year: 2020, Marseille, France, European Language Resources Association (2020)
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Bilingual lexical extraction based on word alignment for improving corpus search
Jelena Andonovski, Branislava Šandrih, Olivera Kitanović. "Bilingual lexical extraction based on word alignment for improving corpus search" in The Electronic Library, Emerald (2019). https://doi.org/10.1108/EL-03-2019-0056
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Distribution of major and trace elements in the Kovin lignite (Serbia)
Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...... less abundant. SEMEDS examination revealed that the most abundant minerals in all the studied lignite samples are clays (illite/smec tite; Table 4; Fig. 4), silicates (quartz, plagioclase), sulphate (gyp sum/anhydrite) and carbonate (calcite). The other ironrich mine rals are sulphides, oxides and ...
... rarely chlorite and plagioclase, and more rarely, mica (biotite, muscovite), and Kfeldspar (Fig. 4). Quartz is a major inorganic component of the Kovin lignites, es pecially in coal seam III (Table 4). Some parts of seams I and II have very high quartz contents. It is recognized as single angular ...
... 2016, 2017). No Borehole ID Field Coal Seam Sample ID Depth Lithology 1 KB–79 B II 2/79 35.35–36.00 MC 2 II 3/79 36.80–37.60 MXC 3 II 4/79 38.00–38.20 XC 4 II 5/79 38.50–39.00 MXC 5 II 6/79 39.00–39.10 MMiC 6 II 8/79 40.15–40.65 MXC 7 III 11/79 67.90–69.30 MMiC 8 III 14/79 114.10–114.25 XC ...Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović. "Distribution of major and trace elements in the Kovin lignite (Serbia)" in Geologia Croatica, Croatian Geological Survey (2019). https://doi.org/10.4154/gc.2019.06
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Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs
John Nyame (2024)The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...... Petroleum Technology, 44(4), p396—400. [66] Oldenburg, C.M., S.H. Stevens and S.M. Benson, 2002: Economic Feasibility of Carbon Sequestration with Enhanced Gas Recovery (CSEGR). Proceedings of the 6th International Conference on Greenhouse Gas Control Technologies (GHGT-6) 1-4 October 2002, Kyoto ...
... Greenhouse Gas Control Technologies (GHGT-4), Interlaken, Switzerland, Aug. 30-Sept. 2, 1998, Elsevier, 1999, 175-180 [80] Godec, M. et al.: CO2 storage in depleted oil fields: The worldwide potential for carbon dioxide enhanced oil recovery. 2011. Volume 4, p2162-2169. [81] Hannis, S.; Lu, J.; ...
... Mining and Geology Contents ONRN:2. OOA VARAANAARAAAAAAAARAANAANAANAAAANATANAANAANATAAAARAARARRRARRATARARRRARARARARARAAARARARAAAARARARARARAKIKII 4 PR MM :{0)D) 0[0 C0 , RRGAGRAAAARAAAAAAARA RAAAA RAAAA RARAAAAAAA RAAAAA AAAAAA AAARARARANAA AAAAA RAAAAAA AAARARARAA RAAAAAA AAAAAA RAAAAA NAAAA 5 ...John Nyame. Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs, 2024
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Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules
The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analizaSvetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón . "Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules" in Bulletin of Engineering Geology and the Environment , Springer (2024). https://doi.org/10.1007/s10064-024-03667-0
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Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability
Marija Živković, Dejan Ivezić (2021)Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија... given in the European Standard EN 15316- 4-5 (Standard EN 15316-4-5 2017). System boundaries for determining the primary energy factor are presented in Fig. 2. Evaluation of the primary energy includes the complete supply chain of the fuel (Standard EN 15316-4-5 2017). Thus, the primary energy factor ...
... 247:119583. https:// doi. org/ 10. 1016/j. jclep ro. 2019. 119583 Standard EN 15316-4-5 (2017) Energy performance of buildings— Method for calculation of system energy requirements and system efficiencies—Part 4–5. District heating and cooling Statistical Office of the Republic of Serbia (2013) ...
... each energy carrier (fuel), as follows: Id,i [ ∕ ] Import dependency of the ith energy carrier/fuel utilized in DH systems is calculated by Eq. (4) pi [/] Fraction of the ith input energy carrier/fuel in the fuel mix ( ∑ pi = 1). Fuel mix diversification (H) is most commonly assessed by the ...Marija Živković, Dejan Ivezić. "Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability" in Clean Technologies and Environmental Policy, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10098-021-02063-6
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The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA
Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski. "The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA" in Inorganica Chimica Acta, Elsevier BV (2017). https://doi.org/10.1016/j.ica.2017.07.012
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Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia
Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević. "Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia" in Marine and Petroleum Geology, Elsevier BV (2020). https://doi.org/10.1016/j.marpetgeo.2020.104252
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Upotreba lidar tehnologije i digitalne fotogrametrije primenom iPhone pametnih telefona na primeru rudnika "Rudnik"
Nikola Mirković, Luka Crnogorac, Aleksa Paunović. "Upotreba lidar tehnologije i digitalne fotogrametrije primenom iPhone pametnih telefona na primeru rudnika "Rudnik"" in 15. Simpozijum „Rudarstvo 2024“ Održivi razvoj u rudarstvu i energetici, Vrnjačka banja, 21-24. maj 2024., Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina (2024)
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Influence of geological substrate on runoff formation, a case study: small river catchments in southeastern Serbia of similar size and with comparable pluviographic regimes
Vesna Ristić Vakanjac, Veljko Marinović, Nikola Milovanović, Marina Čokorilo Ilić, Boris Vakanjac, Jugoslav Nikolić, Saša Bakrač (2022)We are witnessing climate change that is happening both, globally and, at the regionally - or local level. As a result of expected climate change in Southeast Europe, in the first place are the distributions of precipitation within the year (frequent extreme events are present) and then the increase in temperature, which already has a significant impact on evapotranspiration and runoff formed in a particular catchment area. In addition to climatic factors, the geological structure, i.e. the hydrogeological characteristics ...Vesna Ristić Vakanjac, Veljko Marinović, Nikola Milovanović, Marina Čokorilo Ilić, Boris Vakanjac, Jugoslav Nikolić, Saša Bakrač. "Influence of geological substrate on runoff formation, a case study: small river catchments in southeastern Serbia of similar size and with comparable pluviographic regimes" in XXII International Congress of the Carpathian Balkan Geological Association (CBGA), Sofia : Bulgarian Academy of Sciences (2022)