Претрага
491 items
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Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...... markers for Cupressoideae Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Dehydroicetexanes in sediments ...
... markers for Cupressoideae | Hans Peter Nytoft, Geir Kildahl- Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović | Organic Geochemistry | 2019 | | 10.1016/j.orggeochem.2019.01.001 http://dr.rgf.bg.ac.rs/s/repo/item/0005654 Дигитални ...
... Cupressoideae Hans Peter Nytoft a,⇑, Geir Kildahl-Andersen b,1, Sofie Lindström a, Frode Rise c, Achim Bechtel d, Danica Mitrović e, Nataša Ðoković e, Dragana Životić f, Ksenija A. Stojanović g aGeological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark b School ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001
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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). ...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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Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja
Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković. "Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1903369D
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Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu
Četvrtu industrijsku revoluciju – Industriju 4.0 karakteriše upotreba cyber-fizičkih sistema. Da bi se postigla optimalna strategija održavanja (ali i eksploatacije), neophodno je razviti sisteme koji podržavaju napredne inteligentne sisteme održavanja ili tehnologije pametnog održavanja. Iz toga su proizašli postulati Prediktivnog održavanja 4.0 (PdM 4.0) koji definišu veoma blisku budućnost u oblasti održavanja tehničkih sistema pa i rudarske opreme. PdM 4.0 uključuje iskorišćenje snage veštačke inteligencije za stvaranje stalnog uvida u otkrivanje uzroka i anomalija u radu opreme, koje se ...... Vesna Damnjanović, Dragan Ignjatović, Miloš Tanasijević, Stevan Đenadić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu | Predrag Jovančić, Vesna Damnjanović, Dragan Ignjatović, Miloš ...
... Jovančić, Univerzitet u Beogradu, Rudarsko-geološki fakultet 2 Prof. Dr Vesna Damnjanović, Univerzitet u Beogradu, Rudarsko-geološki fakultet 3 Prof. Dr Dragan Ignjatović, Univerzitet u Beogradu, Rudarsko-geološki fakultet 4 Prof. Dr Miloš Tanasijević, Univerzitet u Beogradu, Rudarsko-geološki fakultet 5 ...Predrag Jovančić, Vesna Damnjanović, Dragan Ignjatović, Miloš Tanasijević, Stevan Đenadić. "Industrija 4.0 - koncept prediktivnog održavanja 4.0 (PdM 4.0) u rudarstvu" in IX Međunarodna konferencija UGALJ 2019, Zlatibor, Srbija, 23-26. oktobar 2019., Jugoslovenski komitet za površinsku eksploataciju (2019)
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The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers
One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović. "The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers" in 7th International Symposium Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2019)
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Upravljanje kvalitetom uglja
Ignjatović Dragan, Knežević Dinko, Kolonja Božo, Lilić Nikola, Stanković Ranka. Upravljanje kvalitetom uglja, :Univerzitet u Beogradu - Rudarsko-geološki fakultet, 2007
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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 ...... Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Effectiveness Analysis of Different Bucket-wheel Excavators | Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević ...
... 22 – 25th September 2021, Serbia EFFECTIVENESS ANALYSIS OF DIFFERENT BUCKET-WHEEL EXCAVATORS Stevan Djenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić University of Belgrade – Faculty of Mining and Geology, SERBIA, stevan.djenadic@rgf.bg.ac.rs ...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)
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Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine
Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...... Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Application of the Fuzzy Model ...
... Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine | Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić | SSRN Electronic Journal | 2021 | | 10.2139/ssrn.3945617 http://dr.rgf.bg.ac.rs/s/repo/item/0005584 Дигитални реп ...
... the Evaluation and Selection of Hydraulic Excavators on Open-pit Lignite Mine Stevan Djenadica,*, Milos Tanasijevica, Vladimir Milisavljevica, Dragan Ignjatovica, Predrag Jovancica a Univesity of Belgrade, Faculty of Mining and Geology, Djusina 7, Belgrade 11000, Serbia * Corresponding author ...Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić. "Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945617
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Prognostic Analysis Of Slopes Statics Due To Flooding Of The Opencast Coal Mine Tamnava - West Field
Petrović Branko, Vujić Slobodan, Čebašek Vladimir, Gajić Grozdana, Ignjatović Dragan. "Prognostic Analysis Of Slopes Statics Due To Flooding Of The Opencast Coal Mine Tamnava - West Field" in Journal of Mining Science 52 no. 1, Novosibirsk:Pleiades Publishing, Ltd. 2016 (2016): 110-114
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Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations
Lutovac Suzana, Medenica Dragan, Gluščević Branko, Tokalić Rade, Beljić Čedomir. "Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations" in Energies no. Energies 2016, Vol 9, issue 8, 617, Basel, Switzerland:MDPI AG (2016). https://doi.org/doi:10.3390/en9080617
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Trace elements in recent sediments of the Danube river in Eastern Serbia and environmеntal impact
Jović Vidojko, Vasić Nebojša, Milovanović Dragan, Rаbrеnović Dragoman, Gajić Violeta. "Trace elements in recent sediments of the Danube river in Eastern Serbia and environmеntal impact" in Humboldt-Koleg Belgrade 2013 – Resources of Danubian Region: The Possibility of Cooperation and Utilization, Beograd:Humbolt-Club Serbia (2013): 44-44
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Use of the 3D laser scanning while controlling the geometry of elements of bucket wheel escavator
Milošević Dragan, Pantić Marko, Stojaković Miša, Ganić Aleksandar, Milutinović Aleksandar. "Use of the 3D laser scanning while controlling the geometry of elements of bucket wheel escavator" in Energetsko rudarstvo, nove tehnologije, održivi razvoj : zbornik radova = Energy Mining, New Technologies, Sustainable Development : proceedings / III međunarodni simpozijum Energetsko rudarstvo 2010, 08-11. Septembar, 2010, Banja Junaković, Apatin = 1, Beograd:Rudarsko-geološki fakultet, Beograd (2010): 304-311
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Classical Dinaric karst aquifer – an overview of its past and future (Key note paper)
Stevanović Zoran, Pekaš Željko, Jolović Boban, Pambuku Arben, Radojević Dragan. "Classical Dinaric karst aquifer – an overview of its past and future (Key note paper)" in Proceedings of the DIKTAS Conference: “Karst without boundaries”, Trebinje, June 11-15 2014, Trebinje:DIKTAS Project : Grafokomerc (2014): 23-26
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Transboundary aquifers as additional sensitivity factor in managing water in protected or sensitive areas - Examples from Dinaric karst
Stevanović Zoran, Pekaš Željko, Jolović Boban, Radojević Dragan, Pambuku Arben. "Transboundary aquifers as additional sensitivity factor in managing water in protected or sensitive areas - Examples from Dinaric karst" in Proceedings of Intern. conf. “Waters in sensitive and protected areas”, 13-15 June 2013, Zagreb, Brussels:European Water Association (2013): 214-217
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Lower Miocene terrestrial sediments from the Vrdnik Formation near Beočin (Fruška Gora mt., Serbia) – a preliminary geochemical data.
Rundić Ljupko, Đorđević Dragan, Stanković Maja, Đorđević Milan, Krstić Nenad. "Lower Miocene terrestrial sediments from the Vrdnik Formation near Beočin (Fruška Gora mt., Serbia) – a preliminary geochemical data." in 5th International Workshop on Neogene of Central and SE Europe, Varna, Bugarska:BAN, Bugarska (2013): 53-54
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Geochemical Map of Eastern Serbia in 1:1 000 000. and applicarion in defining the ecological status of selectet area
Gordanić Vojin, Milovanović Dragan, Vidović Milka, Rogan Saša, Trajković Ivana. "Geochemical Map of Eastern Serbia in 1:1 000 000. and applicarion in defining the ecological status of selectet area" in Procceedings of the 17th Meeting of the Assocition of European Geological Societies, MAEGS - Geology and Digital Age, Beograd:Српско геолошко друштвo (2011): 187-192
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Physical-chemistry characterization of the modified limestone
Mihajlović Slavica, Vučinić Dušica, Sekulić Živko, Jovanović Vladimir, Radulović Dragan. "Physical-chemistry characterization of the modified limestone" in Proceedings of 5th BALKAN MINING CONGRESS, Ohrid, Macedonia: (2013): 386-391
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Hidrofobizacija različitih tipova alumosilikata za primenu u prečišćavanju industrijskih voda
Milićević Sonja, Milošević Vladan, Pavicević Vladimir, Vučinić Dušica, Povrenović Dragan. "Hidrofobizacija različitih tipova alumosilikata za primenu u prečišćavanju industrijskih voda" in KVALITET VODE U SISTEMIMA VODOVODA I VODE U INDUSTRIJI, Beograd: (2012)
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Primena impulsne termografije za ispitivanje aluminijumskih i pleksiglas test uzoraka sa periodičnom strukturom defekata
Tomić Ljubiša, Damnjanović Vesna, Kovačević Aleksandar, Knežević Dragan, Kovačević Katarina. "Primena impulsne termografije za ispitivanje aluminijumskih i pleksiglas test uzoraka sa periodičnom strukturom defekata" in Zbornik radova ETRAN 2014 (58. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku), 2-5 juna 2014, Vrnjačka Banja, Srbija, MO3-2 (2014): 1-6
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Dispersion Modeling of Particulate Matter in Surface Lead and Zinc Mine Šuplja Stijena
Nikola Lilić, Vladimir Milisavljević, Uroš Pantelić, Ljiljana Kolonja, Dragan Medenica. "Dispersion Modeling of Particulate Matter in Surface Lead and Zinc Mine Šuplja Stijena" in Mining and Environmental Protection, 5th International Symposium, Beograd:Rudarsko-geološki fakultet, Center for Environmental Engineering (2015): 366-375