Претрага
2157 items
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Hydrogeochemistry of Uranium in the Groundwaters of Serbia
Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić. "Hydrogeochemistry of Uranium in the Groundwaters of Serbia" in Uranium - Past and Future Challenges, Springer International Publishing Switzerland (2015). https://doi.org/10.1007/978-3-319-11059-2_89
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Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining
... since the coal layer is characterized by frequent thickness change, and instead of the second coal layer average depth of 50 m, a maximum depth of 60 m was employed (Figure 5). Figure 5. Schematic representation of the geological coal and gravel deposit, “Kovin”, with pressure changes with increasing ...
... 350, 400, 450, 500, 550, and 600 kPa were applied. The modified cutting resistance testing methodology for underwater coal mining is designed to determine changes in the value of cutting resistance depending on the change in the mining depth, which is represented by the change of hydrostatic (confining) ...
... Validation, V.R., S.Ð., and F.M.; Formal analysis, V.R.; Investigation, V.Č. and V.R.; Resources, V.Č. and V.R.; Data curation, V.R., S.Ð., and F.M.; Writing—original draft preparation, V.Č.; Writing—review and editing, V.R.; Visualization, S.Ð. and F.M. All authors have read and agreed to the published ...Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić. "Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11060564
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Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia
Biljana Abolmasov, Uroš Đurić (2021)... will be focused on results and experience gained from automated Global Navigation Satellite System (GNSS) monitoring network data, PSInSAR data analysis from Sentinel1 radar satellite images, conventional geodetic monitoring network data and UAV imaging, processing and data analysis in the last six ...
... Faculty of Mining and Geology, Serbia, biljana.abolmasov@rgf.bg.ac.rs 2University of Belgrade, Faculty of Civil Engineering, Serbia, udjuric@grf.bg.ac.rs Background The Umka landslide is the deepest and biggest active landslide in the Republic of Serbia and has been investigated and monitored by ...
... monitoring: automated GNSS monitorong network, geodetic benchmark survey monitoring, UAV imaging with photogrammetric processing and analysis, and PSInSAR data processing and analysis. Common to all implemented monitoring techniques is to measure displacement of the observed points (dx, dy, dz) on the ...Biljana Abolmasov, Uroš Đurić . "Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia" in 3rd European Regional Conference of IAEG/ Athens/ Greece/ 6-10 October 2021, IAEG National Group Greece (2021)
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Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization
Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić . "Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization" in Mineral and Thermal Waters of Southeastern Europe, Springer International Publishing (2016). https://doi.org/10.1007/978-3-319-25379-4
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Testing the energy value of different types of coal by the method of active thermography
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 ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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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)... spectrometry in the quantification of _SU and Th in raw materials and by-products. Jourmal of Radioanalytical and Nuclear Chemistry, 311(2), 1163–1168. Jung Y., Lim J.M., Ji Y.Y., Chung K.H. & Kang M.J. (2017) The transport char- acteristics of _*U, Th, ' Ra, and “K in the production cycle of phos- ...
... Hydrometallurgical Processes. PhD thesis, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada. Canovas C.R. (2018) Valorization of wastes from the fertilizer industry: current status and future trends. Journal of Cleaner Production, 174, 678–690. Costa C. ...
... Rajačić M.M., Janković M.M. & Sarap N.B. (2015) Measurement of radioactivity in building materials in Serbia. Journal of Radioanalytical and Nuclear Chemistry, 303(3), 2517–2522. Josip |. Išek et al. Pćrez-Lopez R, Macias F, Canovas C.R., Sarmiento A.M. & Pćrez-Moreno S.M. (2016) Pollutant flows ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11
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Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research
магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија... entation of the traverses and a combination of with and without Global Positioning System (GPS). The sampling time was set to 1 s and the dis- tance between the traverses to 1 m in order to obtain a regular data grid with the same spacing between the points along the x and y directions. DATA ACQUISITION ...
... GSM-19GW (GEMLink) gradiometer, with and without the Global Positioning System. To obtain a regular data grid, the sam- pling was conducted at a 1s interval, and with a distance between the traverses of 1m. The traverses for this process were oriented in a north-south and east-west direction. The best ...
... method. Linear anomalies can be avoided by combin- ing two instruments, one measuring the even, and the other the odd traverses in the parallel acquisi- tion method. Despite the high accuracy that global naviga- tion systems off er, it is advisable to use absolute stations. Current commercial navigation ...Mirko Petković, Vesna Cvetkov, Branislav Sretenović. "Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research" in Arheologija i prirodne nauke (2014)
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Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles
Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...... y)Cl]? and thio- urea undergoes an associative mechanism. Hydrolysis of [Ru(trpy)(bpy)H2O] 2? Potentiometric measurements The hydrolysis constants of the complex were determined by titration of 1.0, 1.5, and 2.0 mM solutions of [Ru(tr- py)(bpy)H2O] 2? with NaOH. The acid-base chemistry was ch ...
... [Ru(trpy)(bpy)Cl]* and thio- urea undergoes an associative mechanism. Hydrolysis of [Ru(trpy)(bpy)H>O]°* Potentiometric measurements The hydrolysis constants of the complex were determined by titration of 1.0, 1.5, and 2.0 mM solutions of [Ru(tr- py)(bpy)H,O]?* with NaOH. The acid-base chemistry was characterized ...
... from the Ministry of Education, Science, and Technological Development of the Republic of Serbia, Project 172011. References 1. Reedijk J (1999) Chem Rev 99:2499 2. Wang D, Lippard SJ (2005) Nat Rev Drug Disc 4:307 3. Lippert B (1999) Cisplatin, chemistry and biochemistry of a leading anticancer drug ...Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović. "Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles" in Monatshefte für Chemie - Chemical Monthly, Springer Science and Business Media LLC (2013). https://doi.org/10.1007/s00706-013-1044-1
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Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines
The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković. "Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines" in 8th International Conference MIining And Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017
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Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije
Marina D. Ćuk (2018-02-23)Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje... concentrations and fluxes based on melt inclusion and volcanic gas data. Journal of Volcanology and Geothermal Research 140: 217 – 240. 172. Wedepohl KH. 1978. Handbook of Geochemistry. Springer-Verlag, Berlin. 173. Weiner ER. 2008. Applications of environmental aquatic chemistry: a practical ...
... 1997. Aqueous Environmental Geochemistry. Upper Saddle River: Prentice Hall. Inc, New Yourk. 94. Lehman A. 2005. Jmp For Basic Univariate And Multivariate Statistics: A Step-by- step Guide. SAS Press, Cary NC. 95. Lide R. 1994. Uranium. In: Lide DR (ed.). Handbook of Chemistry and Physics. 74th ...
... 1992. The Chemical Thermodynamics of Actinide Elements and Compounds. The Actinide Aqueous Inorganic Complexes. IAEA, Wien. 49. Garven G. 1995. Continental-Scale Groundwater Flow and Geologic Processes. Annual Review of Earth And Planetary Sciences 23: 89 – 118. 50. Goldscheider N, Mádl-Szőnyi ...Marina D. Ćuk. "Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-02-23)
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Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)
... Igralishte Pluton (SW Bulgaria): preliminary iso- tope-geochronological and geochemical data. In: Proceedings of Bulgarian Geological Society, Sofia Zidarov N, Tarassova E, Peytcheva I et al (2007) Petrology, geo- chemistry and age dating of Skrut granitoids—new ecvidence for Early Triassic magmatism ...
... between orogenic building and subsequent extension during the tertiary evolution of the NE Dinarides: constraints from low- temperature thermochronology. Glob Planet Change 103:19— 38. doi:10.1016/j.gloplacha.2012.08.004 Tchoumatchenco P (2006) Jurassic tectonics of Bulgaria and the adja- cent areas ...
... Europe-Adria collision: the Fruška Gora of northern Serbia. Glob Planet Change 103:39-62. doi:10.1016/j. gloplacha.2012.10.009 Tranos MD, Lacombe O (2014) Late Cenozoic faulting in SW Bul- garia: fault geometry, kinematics and driving stress regimes. Implications for late orogenic processes in ...Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel. "Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)" in International Journal of Earth Sciences, Springer Science and Business Media LLC (2016). https://doi.org/10.1007/s00531-016-1380-6
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Projection of SO2 emissions in coal power plants in Serbia
Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miodrag Ristović, Miroslav Crnogorac (2023)The production of electricity in the countries of South-Eastern Europe (SEE) was mainly related to the use of coal, predominantly lignite. The total installed capacity of thermal power plants using coal in these seven countries is 17.813 MW, distributed in 31 thermoblocks. The mentioned plants are the dominant pollutant emitters in all observed countries. Data on the largest emitters in the countries of the European Union and a comparison with SEE countries were collected. The calculation of emissions of ...... pollutants and gases from coal-fired thermal power plants has always been a must. Coal production in Europe is steadily declining. In 2010, it was 835 Mt to 516 Mt in 2021. Recent events of a political and economic nature on the soil of Europe have influenced the intensity of the change in energy ...
... University of Belgrade 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 O International Conference MINING AND ENVIRONMENTAL PROTECTION May 2023, Serbia PROJEKCIJA ...
... -atlas/viewer/?config=RYB-2016.json& Framework Convention on Climate change, Conference of the Parties, Twenty-first session, Paris, 30 November to 11 December 2015. International Energy Agency - Report: KElectricity and Heat. Available online: https://countryeconomy.com/ Jovančić P, Tanasijević ...Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miodrag Ristović, Miroslav Crnogorac. "Projection of SO2 emissions in coal power plants in Serbia" in 9th International Conference Mining and environmental protection, Sokobanja 24-27th May 2023., Belgrade : University of Belgrade, Faculty of Mining and Geology (2023)
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Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja
Jovana M. Janković Pantić (2022)Odlaganje otpada na komunalne deponije predstavlja osnovni način zbrinjavanja otpada u Srbiji. Kako bi se prostor za deponovanje materijala racionalno koristio potrebno ga je svakodnevno zbijati sa unapred definisanom količinom vode koja se dodaje. Dobro zbijeni komunalni otpad zauzima manju zapreminu i omogućuje sigurnije skladištenje, pa je korisno prethodno laboratorijski odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). U Srbiji do sada nisu određivani parametri zbijanja, dok je u svetu primenjivana standardna metoda (Proktorov opit) ...Jovana M. Janković Pantić. Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja, Beograd : [J. Janković Pantić], 2022
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Indexing of textual databases based on lexical resources: A case study for Serbian
In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...... Krstev, C.: Developing and Maintaining a WordNet: Procedures and Tools. In: Orav, H., Felbaum, C., Vossen, P. (eds.) Proceedings of the Seventh Global Wordnet Conference, GWC 2014. pp. 55–62. Tartu, Estonia (2014) 13. Nadeau, D., Sekine, S.: A Survey of Named Entity Recognition and Classification. In: ...
... precision in the intersection Fig. 2. Precision-recall curve for the first query (zlato OR Au) AND (Bor OR Borski okrug): left, retrieval wihout index; right, retrieval with index. point k, and ∆(k) is the change in recall from items k − 1 to k. The results show that for 4 queries AP was higher in the old ...
... of geologic data, and provide a modern and effective in- formation basis for carrying out all activities related to planning, design and decision-making in the field of geology. Within the project a web portal3 was established that allows quick and easy access to geological data and information in the ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Indexing of textual databases based on lexical resources: A case study for Serbian" in Semantic Keyword-based Search on Structured Data Sources : First COST Action IC1302 International KEYSTONE Conference, IKC 2015, Coimbra, Portugal, September 8-9, 2015. Revised Selected Papers, Springer (2015). https://doi.org/10.1007/978-3-319-27932-9_15
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Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector
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 indikatoriBoban Pavlović, Dejan Ivezić, Marija Živković. "Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector" in Energy Policy, Elsevier BV (2020). https://doi.org/10.1016/j.enpol.2020.111936
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Using Lexical Resources for Irony and Sarcasm Classification
The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...... is present, but if we remove them, ironic meaning does not change. In the work described by [23] irony markers in BCMS, such as the us- age of particles baš and već10 and stylistic irony markers like punc- tuation marks, exclamation mark, and cursive font were described. Still, irony markers can also ...
... 644–650. [20] Svetla Koeva, Cvetana Krstev, and Duško Vitas. 2008. Morpho-semantic relations in Wordnet – a case study for two Slavic languages. In Global Wordnet Conference (GWC’08). University of Szeged, Department of Informatics, 239–253. [21] Roger J. Kreuz and Gina M. Caucci. 2007. Lexical Influences ...
... quotation marks), syntactic (change of word order) or semantic (word polarity according to sentiment, rhetorical figure hyperbole, rhetorical question, antiphrasis) signals – markers [1], [5] which indicate the existence of irony. Automatic irony detection is used more and more in NLP tasks, primarily ...Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković. "Using Lexical Resources for Irony and Sarcasm Classification" in Proceedings of the 8th Balkan Conference in Informatics (BCI '17), New York, NY, USA, : ACM (2017). https://doi.org/
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Terminological and lexical resources used to provide open multilingual educational resources
Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...... in Proc. 7th Global WordNet Conference, 2014, pp. 127–132. [10] M. Hepp, “Ontologies: State of the art, business potential, and grand challenges,” in Ontology Management, 1 st ed., M. Hepp, P. DeLeenheer, A. De Moor and Y.Sure, Ed. Springer US, 2008, pp. 3-22. [11] M. Uschhold and M. Gruninger ...
... Educational Science. This paper will more thoroughly introduce how the terminology and ontologies are used in combination with NLP tools for the purpose of education. Exactly due to the tendency of global, digitized, education, it is of great importance that the terminology is acquired systematically ...
... (NLP) has a two-faceted approach to education where one involves e-learning and computer-assisted learning and instruction and the other consists of NLP tools for analysis and use of language by machines [1]. The usage and application of the research done in the field of the NLP has been present ...Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić. "Terminological and lexical resources used to provide open multilingual educational resources" in The Seventh International Conference on eLearning (eLearning-2016), 29-30 September 2016, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2016)
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Polymorphism and photoluminescence properties of K3ErSi2O7
alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna strukturaPredrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović. "Polymorphism and photoluminescence properties of K3ErSi2O7" in Acta Crystallographica Section C Structural Chemistry, International Union of Crystallography (IUCr) (2019). https://doi.org/10.1107/S2053229619011926
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Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone
The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...Emő Márton, Marinko Toljić, Vesna Cvetkov. "Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone" in Journal of Geodynamics, Elsevier BV (2022). https://doi.org/10.1016/j.jog.2021.101880