Претрага
666 items
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Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS
Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...... Jovančić, Ignjatović Dragan, Đenadić Stevan Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS | Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan ...
... operation generate about 70 million euros in cash. 1 Dr Jovančić Predrag, Univerzitet u Beogradu, Rudarsko-geološki fakultet 2 Dr Ignjatović Dragan, Univerzitet u Beogradu, Rudarsko-geološki fakultet 3 Đenadić Stevan, Univerzitet u Beogradu - Rudarsko-geološki fakultet 26 Keywords: aggregate ...Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan. "Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS" in X Međunarodna konferencija UGALJ, Zlatibor, Srbija, 13-16. Oktobar 2021., Jugoslovenski komitet za površinsku eksploataciju (2021)
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The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua. "The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis" in Environmental Earth Sciences, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s12665-021-09392-1
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Mineralogy, chemistry, and distribution of selected trace elements in coal and shale from the Ibar Basin (South Serbia)
Željana Novković, Nenad Nikolić, Nevena Andrić-Tomašević, Violeta Gajić, Mercedes Suárez, Emilia García-Romero, Vladimir Simić, Dragana Životić (2024)Željana Novković, Nenad Nikolić, Nevena Andrić-Tomašević, Violeta Gajić, Mercedes Suárez, Emilia García-Romero, Vladimir Simić, Dragana Životić. "Mineralogy, chemistry, and distribution of selected trace elements in coal and shale from the Ibar Basin (South Serbia)" in Thermal Science, National Library of Serbia (2024). https://doi.org/10.2298/TSCI240405143N
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Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3
Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)... Ljiljana Pojinović Ješić Igor Opsenica Milan PFraneš Biljana Šmit Sanja Panić Jovana Francuz Jvan Ristić Milena Krstić Pesna Despotović Dragana Tomašević Pilipović Marija Nikolić Branislav Šojić Tamara Premović Zorica Stojanović Bojana Srećo Zelenović Ksenija Pavlović Aleksandar Oklješa ...Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić. "Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3" in Book of Abstracts Proceedings / 59th Meeting of the Serbian chemical society, Novi Sad, Serbia, June 1-2, 2023, Belgrade : Serbian Chemical Society (2023)
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Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
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The Reciprocal Algebraic Integers Having Small House
Dragan Stankov (2021)Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials... 2024-12-25 10:24:58 The Reciprocal Algebraic Integers Having Small House Dragan Stankov Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The Reciprocal Algebraic Integers Having Small House | Dragan Stankov | Experimental Mathematics | 2021 | | 10.1080/10586458.2021 ...
... (Print) (Online) Journal homepage: https://www.tandfonline.com/loi/uexm20 The Reciprocal Algebraic Integers Having Small House Dragan Stankov To cite this article: Dragan Stankov (2021): The Reciprocal Algebraic Integers Having Small House, Experimental Mathematics, DOI: 10.1080/10586458.2021.1982425 ...
... View Crossmark data EXPERIMENTAL MATHEMATICS https://doi.org/10.1080/10586458.2021.1982425 The Reciprocal Algebraic Integers Having Small House Dragan Stankov Katedra Matematike RGF-a 11000 Beograd, –Dušina 7, Serbia Dedicated to the memory of Professor Aleksandar Ivić ABSTRACT Let α be a reciprocal ...Dragan Stankov. "The Reciprocal Algebraic Integers Having Small House" in Experimental Mathematics (2021). https://doi.org/ 10.1080/10586458.2021.1982425
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Kako napraviti održivi plan upravljanja odvodnjavanjem?
Dragoljub Bajić, Dušan Polomčić (2020)Dragoljub Bajić, Dušan Polomčić. "Kako napraviti održivi plan upravljanja odvodnjavanjem?" in 10. Međunarodni simpozijum o upravljanju podzemnim resursima, Zaječar 2020., Megatrend Univerzitet, Fakultet za menadžment, Zaječar (2020)
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials... distribution modulo 1 of the sum of powers of a Salem number Dragan Stankov Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] On the distribution modulo 1 of the sum of powers of a Salem number | Dragan Stankov | Comptes rendus Mathematique | 2016 | | 10.1016/j ...
... the distribution modulo 1 of the sum of powers of a Salem number Sur la répartition modulo 1 de la somme des puissances d’un nombre de Salem Dragan Stankov Katedra Matematike RGF-a, University of Belgrade, Beograd, Ðušina 7, Serbia a r t i c l e i n f o a b s t r a c t Article history: Received ...Dragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
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Jedan primer očuvane životne sredine - kanjon reke Zabave
Đekić Tatjana, Srećković Batoćanin Danica, Šaćirović Selim, Stanković Aleksandra, Gajić Violeta (2013)Đekić Tatjana, Srećković Batoćanin Danica, Šaćirović Selim, Stanković Aleksandra, Gajić Violeta. "Jedan primer očuvane životne sredine - kanjon reke Zabave" in ECOLOGICA 20 no. 70, Beograd:Naučno stručno društvo za zaštitu životne sredine Srbije-Ecologica (2013): 239-244
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Geomehanical Aspects Of The Openpit Mutalj External Landfill Design
Čebašek Vladimir, Gojković Nebojša, Dimitrijević Bojan, Rupar Veljko. "Geomehanical Aspects Of The Openpit Mutalj External Landfill Design" in Proceedings of the 13th International Symposium Continuous surface mining ISCSM 2016, Beograd:Yugoslav Opencast Mining Committee (2016): 33-44
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Уштеда енергије правилним избором дробилице
Деушић Славен, Кнежевић Динко, Колоња Божо, Томашевић Александра. "Уштеда енергије правилним избором дробилице" in Зборник радова 8. међународног симпозијума Механизација и аутоматизација у рударству и енергетици МАРЕН 2010, Лазаревац, 16-18.06.2010, Београд, Србија:Универзитет у Београду, Рударско-геолошки факултет (2010): 121-130
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Analysis and visualization of geophysical well-logging data from closely spaced boreholes
Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...... Nikolic, Yasemin Levanteli CAVE IN MIROSAVE GORGE - A NEW LATE PLEISTOCENE SITE OF THE SMALL MAMMAL FAUNA IN CENTRAL SERBIA Katarina Bogićević, Dragana Đurić, Draženko Nenadić, Mihailo Jovanović, 4leksandra Savković, Pesna Dimitrijević, Luka Jović, Tamara Dogandžić, PA3BOJ HA MHOILIEHCKATA CEPMHJA ...
... OF STRATIGRAPHY CHARACTERISTICS OF THE MAIN ROCK UNITS IN THE BOR METALLOGENIC ZONE AND THEIR LINK WITH MINERALIZATION Miodrag Banješević, Dragana Bosić PYRITE AND MARCASITE IN THE LOW-SULFIDATION SARNAK GOLD DEPOSIT, SE BULGARIA. CONSTRAINTS ON THE BEHAVIOR OF ARSENIC AND GOLD DURING ...Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov. "Analysis and visualization of geophysical well-logging data from closely spaced boreholes" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)
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Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara
U radu je izvršena uporedna analiza pouzdanosti transportnih sistema dozera koji rade na površinskim kopovima Rudarskog basena Kolubara. Period za koji je vršena analiza je prvih deset godina eksploatacije. Efikasnost tehnološkog procesa na otkopavanju korisne mineralne sirovine i otkrivke u velikoj meri zavisi od rada dozera. Iskorišćene su matematičke metode za aproksimaciju i identifikaciju zabeleženih vremena u radu, kako bi se dobili analitički pokazatelji pouzdanosti. Na ovaj način se bitno podiže kvalitet upravljanja procesom eksploatacije i održavanja mašina na ...Filip Miletić, Dragan Milčić, Miloš Tanasijević, Miloš Milovančević. "Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara" in 10th International Conference Coal 2021, Jugoslovenski komitet za površinsku eksploataciju, Zlatibor (2021)
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Употреба креча од праисторије до данас
Матовић Весна, Шарић Кристина, Ерић Сузана. "Употреба креча од праисторије до данас" in Зборник радова / Семинар и радионица Креч као историјски материјал, Сопоћани, 25-27. августа 2014. ; [организатор] Републички завод за заштиту споменика културе, Београд = [organizer] Institute for the Protection of Cultural Monuments of Serbia, Београд:Републички завод за заштиту споменика културе (2014): 15-24
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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 ...... 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 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] NMR kinetic studies of the ...
... 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 | Inorganica Chimica Acta | 2012 | | 10.1016/j.ica.2012.09.016 http://dr.rgf.bg.ac.rs/s/repo/item/0005666 Дигитални ...
... interactions between [Ru(terpy)(bipy)(H2O)] 2+ and some sulfur-donor ligands Aleksandar Mijatović a, Biljana Šmit a, Ana Rilak a, Biljana Petrović a, Dragan Čanović b, Živadin D. Bugarčić a,⇑ aUniversity of Kragujevac, Faculty of Science, R. Domanovića 12, P.O. Box 60, 34000 Kragujevac, Serbia b ...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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Savremene metode deponovanja pepela i šljake i održivi razvoj
Knežević Dinko, Stevanović Dejan, Banković Mirjana, Tomašević Aleksandra, Matko Zlatan, Lončar Stevan, Beatović Sreten, Nikolić Marijana, Pantelić Uroš (2013)Knežević Dinko, Stevanović Dejan, Banković Mirjana, Tomašević Aleksandra, Matko Zlatan, Lončar Stevan, Beatović Sreten, Nikolić Marijana, Pantelić Uroš. "Savremene metode deponovanja pepela i šljake i održivi razvoj" in International workshop COAL QUALITY MANAGEMENT, MAREN, multimedijalni zbornik prezentacija, Beograd, Srbija:Rudarsko-geološki fakultet (2013)
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Минералошко- петрографска анализа кречњака из каменолома Литице (Нови Пазар) као потенцијалне сировине зам производње креча
Шарић Кристина, Матовић Весна, Ерић Сузана, Јеликић Алекса. "Минералошко- петрографска анализа кречњака из каменолома Литице (Нови Пазар) као потенцијалне сировине зам производње креча" in Зборник радова / Семинар и радионица Креч као историјски материјал, Сопоћани, 25-27. августа 2014. ; [организатор] Републички завод за заштиту споменика културе, Београд = [organizer] Institute for the Protection of Cultural Monuments of Serbia, Београд:Републички завод за заштиту споменика културе (2014): 79-88
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E-Waste Management in Serbia, Focusing on the Possibility of Applying Automated Separation Using Robots
Dragana Nišić, Branko Lukić, Zaviša Gordić, Uroš Pantelić, Arso Vukićević. "E-Waste Management in Serbia, Focusing on the Possibility of Applying Automated Separation Using Robots" in Applied Sciences, MDPI AG (2024). https://doi.org/10.3390/app14135685
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Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications
The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov. "Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications" in Swiss Journal of Geosciences, Basel : Springer International Publishing (2018). https://doi.org/10.1007/s00015-018-0321-8
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The synergy of polarized transmitted light microscopy and scanning electron microscopy in mineralogical-petrological investigations of cultural heritage objects
Kristina Šarić, Vesna Matović, Suazana Erić. "The synergy of polarized transmitted light microscopy and scanning electron microscopy in mineralogical-petrological investigations of cultural heritage objects" in 14th Multinational Congress on Microscopy, Belgrade, Serbia, September 15-20, 2019, University of Belgrade, Institute for Biological Research “Siniša Stanković”, National Institute of Republic of Serbia, Serbian Society for Microscopy, Serbia (2019)