Претрага
443 items
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Flyrock induced by blasting in surface mining
Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac (2022)Miniranje predstavlja i dalje najefikasniji i najjeftiniji način eksploatacije velikih količina čvrstih mineralnih sirovina na površinskim kopovima. Energija eksplozije se koristi za fragmentaciju čvrste stenske mase do zahtevane granulacije. Pored pozitivnih efekata miniranja, postoje i određeni neželjeni efekti svakog procesa miniranja koji se mogu javiti, a to su: potresi tla, razletanje komada stene, vazdušni udari, otrovni i zagušljivi gasovi i prašina. Razletanje komada stene je nekontrolisano izbacivanje fragmenata odminirane stenske mase i predstavlja jedan od glavnih izvora materijalne štete ...Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac. "Flyrock induced by blasting in surface mining" in Rudarski glasnik, Beograd : Rudarski institut (2022). https://doi.org/10.25075/BM.2022.05
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Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)
Biljana Rujević, Mihailo Škorić (2024)The paper describes linking the Digital Repository of the University of Belgrade, Faculty of Mining and Geology, with the eScience system in terms of transferring metadata about the results of researchers' scientific work. The steps taken to ensure a smooth harvesting of metadata are outlined. Additionally, a presentation of additional improvements to the OAI system is provided, aiming to contribute to the automatic linking of authors with their results in the eScience system.Biljana Rujević, Mihailo Škorić. "Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)" in Infotheca, Faculty of Philology, University of Belgrade (2024). https://doi.org/10.18485/infotheca.2023.23.2.4
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LRMI markup of OER content within the BAEKTEL project
... Course module name: Leksicko prepoznavanje u obradi prirodnih jezika author: Cvetana Krstev, Biljana Lazić publisher: University of Belgrade description: Kursom su obuhvaćene morfološka, leksička i sintaksička analiza u obradi prirodnih jezika. Neke od tema su upotreba regularnih izraza za ...
... about: Unitex about: Computational linguistics about: Natural language procesing about: Računarska linvistika about: Obrada tekstova na prirodnom jeziku about: elektronski rečnici about: analiza teksta about: konačni automati Apart from edX resources, other OER published within BAEKTEL ...
... [3] The Dublin Core Metadata Initiative (DCMI) http://dublincore.org/, ISO 15836:2009 Information and documentation - The Dublin Core metadata element set, 2012. [4] IEEE Learning Technology Standards Committee (LTSC), 1484.12.1-2002 IEEE Standard for Learning Object Metadata, 2002. [5] Friesen ...Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić. "LRMI markup of OER content within the BAEKTEL project" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade : Belgrade Metropolitan Univesity (2015)
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Coal homogenization stockyard sizing “Tamnava – Zapad” case study
... pile depends on the stacked coal quality. The term "coal quality" is not clearly defined and is treated differently from pit to pit. The common element in all considerations is selection of parameters whose variations have the greatest negative impact on the combustion process, whether because ...Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer. "Coal homogenization stockyard sizing “Tamnava – Zapad” case study" in Proceedings of 13th International Symposium Continuous Surface Mining, ISCSM 2016, / (2016)
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A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)
... pp. 67-74. KAMKAR-ROUHANI, A. (2008) A Finite Difference Groundwater Modelling and Comparison of the Results with Those Obtained Using Finite element modelling approach. In: RAPANTOVA, N. and HRKAL, Z. (eds.) Proceedings of the 10th International Mine Water Association Congress: Mine Water and ...Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin. "A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)" in Underground Mining Engineering no. 29, Belgrade : University of Belgrade - Faculty of mining and geology (2016): 43-54
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VENTEX: An Expert System for Mine Ventilation Systems Analysis
Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...... to the procedures related to the object. In order to incorporate declarative knowledge, this model was modified by including a new (fourth) element, featuring the production (IF-THEN) rules related to an object in the model /Fig. 1/. Thus both the procedural and declarative knowledge related ...Ranka Stanković, Nikola Lilić, Ivan Obradović. "VENTEX: An Expert System for Mine Ventilation Systems Analysis" in YU Info '96 Brezovica, Društvo za informacione sisteme i računarske mreže (1996)
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Hidrogeoekološki uslovi eksploatacije kamenih i mrkih ugljeva Srbije
Branko R. Miladinović (2016-04-27)Ugalj predstavlja energent na čijoj osnovi se razvija privreda celog sveta.Zato mu se pridaje velika pažnja u eksploataciji i preradi, bez obzira na mnogeštetne uticaje na životnu sredinu, a posebno na efekat staklene bašte koji sestvara emisijom zagađujućih materija u atmosferu radom termoelektrana naugalj.U Srbiji, resurs koji se danas u najvećoj meri koristi u proizvodnjielektrične energije je ugalj i on učestvuje u proseku sa 70 %. U strukturi ukupneproizvodnje ugljeva, dominiraju lignitski ugljevi sa učešćem od 98 %, a ...Srbija, kameni i mrki ugalj, podzemna eksploatacija, preradauglja, rudničke vode, hemijski sastav, emisija zagađujućih materija, životnasredina... (mikroorganizmi, hemijska svojstva elemenata, rastvorljivost hemijskih jedinjenja, pH i oksidaciono-redukcioni uslovi); - antropogeni procesi koji nastaju u geološkoj sredini sa otvaranjem ležišta i njegovog odvodnjavanja tokom eksploatacije uglja, čime se narušava prirodni režim podzemnih voda. Sprovedena ...
... (As) u rudničkim vodama ležišta kamenih i mrkih ugljeva Srbije Stroncijum (Sr) predstavlja smešu četiri prirodna izotopa (84Sr, 86Sr, 87Sr i 88Sr). Relativno je malo zastupljen element i najčešće se u prirodi nalazi u obliku teško rastvorljivih minerala i to: celestina (stroncijum-sulfata SrSO4) ...
... mg/l, odgovarali su klasifikaciji za I klasu površinskih voda. Ovim primerom, uočen je prirodni proces smoprečišćavanja površinske vode, odnosno prirodni proces regeneracije, koji teži uspostavljanju prirodne ravnoteže. U Srbiji se poslednjih dvadeset pet godina, ostvarajuje relativno mala ...Branko R. Miladinović. "Hidrogeoekološki uslovi eksploatacije kamenih i mrkih ugljeva Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-04-27)
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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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Tektonske i litostratigrafske karakteristike šireg područja Grivske (Zapadna Srbija)
Nikola Otašević (2024)U ovom radu predstavljene su osnovne geološke karakteristike šireg područja Grivske. U litostratigrafskom pogledu na ovom prostoru prisutne su paleozojske, mezozojske i kenozojske sedimentne, magmatske i metamorfne stene. Tvorevine karbona su predstavljene semimeta-morfisanim tvorevinama.Tvorevine trijaske starosti su predstavljene slojevitim i masivnim krečnjacima, dok su tvorevine jure predstavljeni produktima ofiolitskog melanža. Takođe, prisutne su i tvorevine senona koje su predstavljene masivnim krečnjacima. U neogenoj sukcesiji dominiraju klastiti miocena, dok su u kvartaru zastupljeni različiti tipovi fluvijalnih, deluvijalnih i deluvijalno-proluvijalnih tvorevina. ...Nikola Otašević. Tektonske i litostratigrafske karakteristike šireg područja Grivske (Zapadna Srbija), 2024
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Geonasleđe Golije i Peštera
Ljiljana V. Grujičić-Tešić (2017-09-01)Sprovedena istraživanja u ovoj studiji obuhvatila su izdvajanje, opis, evaluaciju i valorizaciju objekata geonasleđa u cilju razvoja istraživane oblasti sa stanovišta geonauka, geoturizma i geoekologije. Na izučavanom području objekti geonasleđa su evidentirani, interpretirani, vrednovani i kategorisani, dat je predlog promocije geoobjekata, i na kraju predložena dopuna inventara objekata geonasleđa Srbije.U protekle četiri godine, na kompleksu geotopa Golije i Peštera istražena su geološka svojstva stena (tip stene, starost, fosilni sadržaj, morfološke i hidrogeološke karakteristike itd.), na osnovu čega je bilo ...... (2010): Geološki objekti i pojeve kao integralni deo prirodne i kulturne baštine. Zbornik radova 15 kongresageologa Srbije sa međunarodnim učešćem. Beograd. str. 711 - 719. Rundić, Lj. (2010): Geološki objekti i prirodni fenomeni kao integralni elementi geodiverziteta grada Beograda. Rudarsko - geološki ...
... PEŠTERA 11 prirodnih i drugih resursa životne sredine. U postupku priključivanja EU, države kandidati moraće da usklade svoja zakonodavstva u ovoj oblasti sa evropskim ali i da usvoje važeće principe i odgovarajući pogled na svet. Proces pridruživanja EU ima tri ključna elementa: harmonizacija ...
... Zaštićena prirodna dobra mogu biti svrstana u tri kategorije: prirodna dobra od izuzetnog značaja, prirodna dobra od velikog značaja i značajna prirodna dobra. Režim zaštite na zaštićenom području može biti І stepena, režim zaštite ІІ stepena i/ili režim zaštite ІІІ stepena. Prirodna dobra koja ...Ljiljana V. Grujičić-Tešić. "Geonasleđe Golije i Peštera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-09-01)
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Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala
Srđan B. Stanković (2016-09-11)Jezero Robule, formirano u podnožju rudničke raskrivke Oštreljski planir (Rudnik bakra Bor), je nastalo kao posledica rudarskih aktivnosti. Mikrobiološki diverzitet ekstremno kiselog jezera Robule ispitivan je primenom kako klasičnih mikrobioloških metoda (svetlosna mikroskopija i kultivacija na selektivnim podlogama) tako i primenom savremene metode molekularne biologije (analiza polimorfizama terminalnih restrikcionih fragmenata; T-RFLP). Takođe, ispitivan je i potencijal i efikasnost jezerske vode u biološkom luženju mineralnog koncentrata, kao i u bioluženju uzoraka stare flotacijske jalovine Rudnika bakra Bor.Na osnovu dobijenih rezultata ...... kisela staništa mogu nastati usled prirodnih procesa, međutim većina ekstremno kiselih staništa na planeti su antropogena. 8 1.4.1 PRIRODNA EKSTREMNO KISELA STANIŠTA Geotermalni izvori bogati sumporom su najčešća kisela staništa nastala prirodnim putem. Ove izvore nastanjuju mikroorganizmi ...
... se kreće od 3 do 8. Rio Tinto, 100 kilometara duga reka na jugu Španije, je primer kisele životne sredine nastale prirodnim putem, ali na drugačiji način u odnosu na opisana prirodna kisela staništa. Ova reka protiče kroz Iberijski piritski pojas, 250 km dugačak geološki entitet bogat piritom i ...
... bakterijskim konzorcijumom iz jezera Robule. Prirodna kisela staništa odlikuje izuzetno mali biodiverzitet, stoga je za proces bioluženja bakra bolje primenjivati bakterijske konzorcijume napravljene u laboratoriji, koji su složeniji od prirodnih i sadrže mikroorganizme sa različitim fiziološkim ...Srđan B. Stanković. "Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-11)
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An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)
N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero. "An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)" in Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier BV (2020). https://doi.org/10.1016/j.palaeo.2020.110145
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Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example
Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska. "Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2020). https://doi.org/10.1007/978-3-030-60227-7_29
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WS4LR - a Worksation for Lexical Resources
... eology']” the user can retrieve all synsets from the working wordnet that belong to the domain of geology, or more precisely, that contain the elementwith the content “geology”. New synsets can be added to wordnets using predefined forms. If working simultaneously with two wordnets, the ... Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović. "WS4LR - a Worksation for Lexical Resources" in Proceedings of the Fifth Interantional Conference on Language Resources and Evaluation, Genoa, Italy, May 2006, ELRA - European Language Resources Association (2006)
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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... Taking the generated matrix, an extent ana- lysis of all the elements of the matrix is conducted, resulting in m values of step analyses for each element of the set X: where all , j = 1, 2, …, m are triangular fuzzy numbers. Then, taking into account the membership function of the triangular ...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)... Geological Map of SFR Yugoslavia 1:500 000 (SAVEZNI GEOLOŠKI ZAVOD, 1970); VZWB – Vardar Zone Western Belt, JB – Jadar Block, DIE – Drina-Ivanjica Element Đerić and Gerzina: New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia) Table 1: Distribution of ...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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Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm
Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering... authors use the term “partial” for all assessments that analyze the impact of a particular project, e.g., wind farms, on only one environmental element (factor)) for each of the mentioned aspects of the impact, but only as an integral part of a unique impact assessment, within which a holistic approach ...
... desirable and significant to use simulation models that give quantitative results, even if this means a partial assessment for just one environmen- tal element processed in SEA. In the case of wind farms, a partial quantitative impact as- sessment can be applied to the prediction of noise levels, shadow flicker ...Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić. "Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm" in Energies, MDPI AG (2021). https://doi.org/10.3390/en14196174
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Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance
Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović (2017)Neo-Tethys, trench-like basins, synorogenic deposition, evolving thrust belt, Triassic palaeogeography... External zones, the central ophiolite zone (Dinaridic-Mirdita— Pindos ophiolites), the Internal zones (Pelagonian zone, Korabi zone, Drina-Ivanjica Element/unit) and the Vardar ophiolites. For details, e.g.: Aubouin 1973; Dimitrijević 1997; Karamata 2006. bl — Tectonic units and terranes of the central ...
... Mesozoic Plate Tectonics. J. Geology &1, 328-340. Dimitrijević M.N. & Dimitrijević M.D. 1991: Triassic carbonate platform of the Drina-Ivanjica element (Dinarides). 4cfa Geol. Hung. 34, 15–44. Djerić N., Gerzina N. & Schmid M.S. 2007: Age of the Juarassic radiolarian chert formation from the ...Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović. "Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance" in Geologica Carpathica (2017)
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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... contami- nate the apparatus. AC2 was first eluted with water to remove phosphoric acid and then pre- treated as described above. Chemical analysis. Element analyses for C, N and H were performed on a Vario EL cube (Elementar Analysensysteme GmbH, Langenselbold, Germany). All chars were dried at 106 ...
... 1371/journal.pone.0277365.t006 corresponds to the abundance found by chemical analysis and by XRD. The deviation of the O/C ratio from XPS and element analysis (Fig 2) was largest for the activated carbons and PW?700g. The lower O/C ratio for AC2 obtained by XPS can be explained by the removal of ...
... fraction due to surface functional groups would be only about 0.07 instead of 0.1. The resulting O/C ratio is much closer to the value found by element analysis (0.06). The results for the relative fraction of different types of CO functional groups obtained by C1s and O1s are in fair agree- ment ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)
Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...Nevenka Novaković, Predrag Dabić, Vesna Matović. "Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2023). https://doi.org/10.1007/s12665-023-10794-6