Претрага
448 items
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Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia
Dragoljub Bajić, Dušan Polomčić (2014)A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables... Journal of Operational Research, 95: 649–655. CHANG, Y.H., CHENG, C.H. & WANG, T.C. 2003. Performan- ce evaluation of international airports in the region of East Asia. Proceedings of the Eastern Asia Society for Transportation Studies, 4: 213–230. CHOU, T.Y. & LIANG, G.S. 2001. Application of a fuzzy ...Dragoljub Bajić, Dušan Polomčić. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia" in Geološki anali Balkanskoga poluostrva, Belgrade : University of Belgrade - Faculty of mining and geology (2014). https://doi.org/10.2298/GABP1475103B
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New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)
Nevenka Đerić, Nataša Gerzina (2014)... compression of Gond- ana and Eurasian units.–- In: ROBERTSON A.H.F. & MOUNTRA- KIS D. (eds.): Tectonic development of the Eastern Mediterranean Region.- Geol. Soc. London, Spec. Publ, 260, 155—178. KARAMATA, S.. KNEŽEVIĆ, V., MEMOVIĆ, E. & POPEVIĆ, A. (1994): The evolution of the Northern Part ...Nevenka Đerić, Nataša Gerzina. "New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)" in Geologia Croatica (2014)
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Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje
Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...... International Telecommunication Union. Available on: https://www.itu.int/net4/ITU-D/idi/2017/index.html [2] Mining and Green Growth in the EECCA Region. (2019). OECD — Organization for Economic Co- operative and Development doi: https://doi.org/10.1787/1926a45a-en available on: https://www.oecd- ...Stevan Đenadić, Aleksandar Mirković, Veljko Rupar . "Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje" in XVI Međunarodna rudarska konferencija OMC 2024, Zlatibor, 9 - 12. oktobar 2024, Jugoslovenski komitet za površinsku eksploataciju (2024)
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Konceptualni model hidrogeotermalnog sistema šire okoline Brusa - geološki, geofizički i hidrogeološki uslovi / Conceptual model of hydrothermal system of Brus area - geological, geophysical and hydrogeological condition
Dejan Milenić, Ana Vranješ, Marinko Toljić, Ivana Vasiljević, Natalija Radosavljević, Matija Ognjanović (2024)Na širem području Brusa izvedena su naučna multidisciplinarna istraživanja za potrebe ocene geotermalnog potencijala sa zadatkom de9inisanja uslova formiranja geotermalnih i termomineralnih resursa. Interpretacijom podataka zaključeno je da je na predmetnom terenu formiran "hibridni" hidrogeotermalni sistem, koji sadrži elemente sistema u rov-strukturi i elemente konvektivnog hidrogeotermalnog sistema sa rezervoarom u pokrivaču granitoidne intruzije. Sistem čine dva nezavisna hidrogeotermalna rezervoara. Prvi rezervoar formiran je u gornjokrednim krečnjacima na dubini od oko 1550 m. Maksimalne prognozne temperature hidrogeotermalnih resursa u krečnjačkom ...Dejan Milenić, Ana Vranješ, Marinko Toljić, Ivana Vasiljević, Natalija Radosavljević, Matija Ognjanović. "Konceptualni model hidrogeotermalnog sistema šire okoline Brusa - geološki, geofizički i hidrogeološki uslovi / Conceptual model of hydrothermal system of Brus area - geological, geophysical and hydrogeological condition" in XVII Srpski simpozijum o hidrologiji sa međunarodnim učešćem , Pirot, Srbija, 02-06. October 2024, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2024). https://doi.org/10.5281/zenodo.13739406
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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)... meaning there is no longer any dumping of waste. 2. Study Area The study area is situated on the large highland Kosovo, to the north of the Autonomous Region Kosovo and Metohija (Figure 1). Administratively, it belongs to the municipalities of Zvečan and Kosovska Mitrovica. The study area has the typical ...
... three tailings is 0.0909. For criterion C8, geology, all tailings have identical weight coefficient which is 0.2. For criterion C9, general slope of a region, A4 Tvrd̄anski Do and A5 Bostanište 0.2889 have the greatest value of weight coefficient, and the A2 Gornje Polje 0.0723 has the minimum value. For ...Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić. "Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija" in Energies, MDPI AG (2016). https://doi.org/10.3390/en9110935
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Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs
Saša Milanović, Ljiljana Vasić (2021)Saša Milanović, Ljiljana Vasić. "Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs" in Hydrogeology Journal, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10040-020-02280-1
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Истраживањe могућности коришћења нискотемпературних извора топлоте за одрживи развој енергетике градова
Miodrag M. Grujić (2014-06-04)Одрживост је континуиран процес балансирања између животне средине, економске исоцијалне димензије, који се односи на системска побољшања животног окружења.Енергија се налази међу покретачима одрживог развоја везано за потребу за повећањесоцијалног благостања, његову кључну улогу у економском развоју и утицај на животнусредину. Урбане зоне, као центри потреба за енергијом и емисија угљеника, пружајузначајне могућности за промоцију одрживости енергетског система заједнице.Планирање нових енергетских капацитета, у складу са принципима одрживог развоја,обухвата спровођење политике повећања енергетске ефикасности и увођења обновљивихизвора енергије. Дисертација ставља ...одрживи развој, даљинско грејање, модел, сценарио, вишекритеријумскаанализа, нискотемпературни извори, ELECTRE, Београд... вишекритеријумских метода као помоћ за доношење одлука у циљу планирања развоја комплетне енергетике или неког њеног дела у некој земљи, граду или региону, уз задовољење захтева у погледу заштите животне средине. За обезбеђење одрживог развоја неопходно је знатно веће коришћење обновљивих извора енергије ...
... избору и покретању инвестиције. Метода ELECTRE која се користи у истраживању, успешно је коришћена за планирање и оцену регионалног енергетике региона, градова и острва, израду акционих планова, за израду енергетских стратегија, избор система грејања итд. [29,36,40,58,64] При томе су постављани ...
... основу оцене информација и предлагања оптималног енергетског плана. Енергетски планови скицирају пут за токове енергије на нивоу држава или региона у оквиру дефинисаног врменског оквира. Иако се поступак планирања разликује у зависности од економских, политичких, социјалних и еколошких локалних ...Miodrag M. Grujić. "Истраживањe могућности коришћења нискотемпературних извора топлоте за одрживи развој енергетике градова" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-06-04)
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Modeliranje sistema upravljanja zaštitom životne sredine u rudarsko-energetskim kompleksima
Jelena R. Malenović - Nikolić (2016-07-12)Efikasnost funkcionisanja sistema upravljanja zaštitom životne sredine u rudarskoenergetskimkompleksima zavisi od stepena sprovođenja usvojene politike zaštiteživotne sredine i primene preventivnih mera zaštite životne sredine. Nedostatakfinansijskih sredstava za unapređivanje tehnologije eksploatacije, transporta, pripreme iprerade energetskih mineralnih sirovina u našim rudarsko-energetskim kompleksima,negativno utiče na ostvarivanje ciljeva zaštite životne sredine, a posledice radnihaktivnosti rudarsko-energetskih kompleksa dovode do smanjenja nivoa kvalitetavazduha, vode i zemljišta...rudarsko-energetski kompleks, životna sredina, sistem upravljanja,višekriterijumsko odlučivanje, modeliranje... Univerzitet u Beogradu, Beograd, 1996 112. Elsewi, A., Grimm, S., Page, A., Straughan, R., Boron enrichments of plants and soils treated with coal ash. J. Plant Nutrition 3, 1981, pp. 409-427 113. Matić, Ž., Uklanjanje arsena iz deponijskih voda pepelišta termoelektrana, Međunarodna konferencij ...
... -Upravljanje zaštitom životne sredine u Elektroprivredi, ELEKTRA II, Tara, 2002 118. Đikić,A., Ilić,Z., Marić, S., Babović,M., Influence of Flu-Ash of Kosovo Thermoelectric Ponjerplants on Properties of Soil Tzpe Districh Cambisol, I Regional sumpsium “Chemistry and Environment”, Srpsko hemijsko ...
... ocenu politike uštede energije i kontrole emisije gasova staklene bašte (STUBOVI), dinamički integrisani model analize odnosa klime i ekonomije regiona (RAJS), model analize odnosa energije, životne sredine i ekonomije (E3MG), model za ocenu funkcionisanja energetskog tržišta (VEM) i model za ...Jelena R. Malenović - Nikolić. "Modeliranje sistema upravljanja zaštitom životne sredine u rudarsko-energetskim kompleksima" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-07-12)
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Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
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Upravljanje resursima podzemnih voda severne Bačke
Bojan B. Hajdin (2013-03-07)Vodosnabdevanje gradova i naselja severne Bačke vrši se u potpunosti iskorišćavanjempodzemnih voda. Najznačajnije količine podzemne vode namenjene za piće zahvatajuse iz izdani u vodonosnim pleistocenskim naslagama koje su poznate kao osnovnivodonosni kompleks, dok su danas u vodosnabdevanju manje zastupljene vode izizdani u pliocenskim sedimentima i prve, slobodne izdani rasprostranjene plitko ispodpovršine terena.Pored snabdevanja stanovništva, veliki potrošači podzemne vode su i industrijskapreduzeća, a zbog loših uslova i nerazvijenih sistema za navodnjavanje sve veći korisnicivoda prve izdani postaju i poljoprivredni proizvođači.Geološka ...resursi podzemnih voda, vodosnabdevanje, održivo upravljanje, osnovni vodonosni kompleks, termomineralne vode, monitoring podzemnih... teritoriji jedne države, kreću se i iskorišćavaju na područjima susednih država. Na taj način podzemne vode postaju zajednička briga svih zemalja u regionu, posebno zbog činjenice da su često i u većini susednih država osnovni resurs koji se koristi za vodosnabdevanje stanovništva i industrije. ...
... Bačke i Vojvodine imati trend blagog porasta. Ovakav trend porasta odražava se i na ostale elemente klime kao i na opšti vodni bilans u ovom regionu. Posledicama klimatskih promena više pažnje posvećeno je u poglavlju 21.5. rada. 3.2. Padavine Padavine su jedan od najznačajnijih elemenata ...
... v”, specifičan kao obiman poduhvat u hidrotehnici čija je izgradnja počela krajem XVIII veka, značajan je i danas za celokupnu privredu ovog regiona. Delovi tehničkih rešenja koji su po prvi put korišćeni u gradnji ovog sistema, kasnije su primenjivani na drugim objektima u svetu. Potreba da ...Bojan B. Hajdin. "Upravljanje resursima podzemnih voda severne Bačke" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-03-07)
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Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material
Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, PyrophylliteBorislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić. "Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material" in Applied Surface Science, Elsevier BV (2022). https://doi.org/10.1016/j.apsusc.2022.155114
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Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)
Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, SerbiaLiubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić. "Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)" in Stratigraphy and Geological Correlation, Pleiades Publishing Ltd (2020). https://doi.org/10.1134/S0869593820010037
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Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
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A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia
When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...... the analytic hierarchy process. European J Oper Res 108 (1), 165–169. Gajić, G., Mitrović, M., Pavlović, P., 2019. Chapter 4 - ecorestoration of fly ash deposits by native plant species at thermal power stations in Serbia. In: Phytomanagement of polluted sites. Elsevier, pp. 113–177. Gerse, A., 2015 ...Boban Pavlović, Dejan Ivezić, Marija Živković. "A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia" in Energy Reports, Elsevier BV (2021). https://doi.org/10.1016/j.egyr.2021.02.072
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Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone
Aleksandar Luković (2021)Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...... Stormer, J.C., Whitney, J.A., (1985): Two feldspar and iron-titanium oxide equilibria in silicic magmas and the depth of origin of large volume ash-flow tufts. American Mineralogist, 70, 52-64. Stout, M. Z., & Bayliss, P., (1980): Crystal Structure of Two Ferian Ulvospinels from British Columbia ...
... prisustvo neprovidnih minerala i izvršena je njihova delimična determinacija. Tokom mikroskopskih ispitivanja izvršeno je i fotografisanje specifičnih regiona u preparatu u cilju prezentovanja morfoloških i teksturnih karakteristika minerala, ali i radi daljeg ispitivanja nekom od instrumentalnih metoda ...
... , Neubauer F., Velichkova S. H., Ivanov Z., (2003): 40Ar/39Ar age contrains on the timing of the formation of Cu-Au deposits in the Panagyurishte region, Bulgaria. In: Neubauer F., Hadler R., (eds). Geodynamics and Ore Deposit Evolution of the Alpine-Balkan-Carpathian- Dinaride Province. Final GEODE-ABCD ...Aleksandar Luković. Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone, Beograd : [A. Luković], 2021
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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 ...... within one criterion a disjunction is generated. For example, if the user is inter- ested in projects that deal with the research of “gold in the Bor region”, then mineral resource is selected as one criterion and the words zlato ‘gold’ and Au are defined for search, and the system will search for any of ...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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Using technology for knowledge transfer between academia and enterprises
Ivan Obradović, Ranka Stanković (2014)... impediment due to lack of adequate legislation regulating the practices and principles of publishing and using OER content, especially in the WB region. As for the technical issues, successful development of the TEL platform requires coordination of activities among partners with possibly different ...Ivan Obradović, Ranka Stanković. "Using technology for knowledge transfer between academia and enterprises" in Knowledge and Management Models for Sustainable Growth, Proc. of IFKAD 2014, 9th International Forum on Knowledge Asset Dynamics, 11-13 June 2013, Matera, Italy, Bari : IFKAD (2014)
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NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands
Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić. "NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands" in Inorganica Chimica Acta, Elsevier BV (2012). https://doi.org/10.1016/j.ica.2012.09.016
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... been drilled in the study area [18]. According to the type of porosity and hydrodynamic characteristics, there are two types of aquifers in this region: confined and unconfined, both in Quaternary sands. The unconfined aquifer was formed in Quaternary alluvial sands. The depth of the sediments ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)