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Упит dcterms_creator_txt:Vučković D.

989 items

  • Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash

    Aleksandra Tasić, Ivana Sredović-Ignjatović, Ljubiša Ignjatović, Marija Ilić, Mališa Antić (2016)
    The aim of this paper is to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction pro¬cedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As and Be) in fly ash extracts were measured by inductively coupled plasma-atomic emission spectrometry. Single-agent extractions of metals were conducted at sonication times of 10, ...
    leteći pepeo uglja, ekstrakcija sa jednim agensom, sekvencijalna ekstrakcija, mikrotalasi, ultratalasi

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи
    ... gives that 〈H〉α ( Reff c (L), L ) − Hc = −HcB′ueff 1c − ĥα ( ueff 1c L1/ν ) L1/μ ∼ −HcB′ D L1/ν − ĥα (D) L1/μ , where ueff 1c corresponds to given L and therefore ueff 1c L1/ν ≈ D, where D is a constant independent of L. Because 1/ν < 1/μ, this implies that the leading term for big L ...
    ... So Eq. (29) from Ref. [63] gives that Ic h (uf2L'’”) ff ff aed (H)a(Re"(L), L) — He = -H.Blujg — D fhy(D) / a —H.B Lie ne? where u$" corresponds to given L and therefore us" L'/” ~ D, where D is a constant independent of L. Because 1/v < 1/p, this implies that the leading term for big L is pr ...
    ... equilateral cubic lattices in which case it was shown that the model exhibits a nontrivial critical behavior in dimensions 2 � d � 5 [17–21] and the mean-field criticality for d � 6 [22–25]. Recently this limitation in scope has been lifted due to a growing scientific and technological interest regarding ...

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending
    ... s, s′, a, b – the first and last layer intersected by slice s, a, b ∈{1, 2, …, n}, c, d – the first and last layer intersect- ed by slice s′, c, d ∈{1, 2, …, n}, b – a + 1 – the number of layers in slice s and d – c + 1 – number of layers in slice s′, and k, m, n – the numbers of output/input parts ...
    ... EFFICIENCY OF THERMAL POWER PLANTS THROUGH MINE COAL QUALITY PLANNING AND CONTROL by Mirjana V. BANKOVI] *, Dejan R. STEVANOVI] , Milica D. PEŠI] , Aleksandra Dj. TOMAŠEVI] , and Ljiljana R. KOLONJA Faculty of Mining and Geology, University of Belgrade, Belgrade, Serbia Original scientific ...
    ... layers in a slice. The mathematical modelling of the property of two slices, s and s′, at mutual distance k, is [13]: , db j ji i j ci a s sb d i j i a j c x vx v y y v v == ′ = = ′′ = = ∑∑ ∑ ∑ (7) where ys is the output property in slice s, s ∈{1, 2, …, m}, ys′ – the output property ...

  • Coal: exploration, reserves, and utilization

    Dragana Životić, Gligor Jovanovski, Vladimir Simić, Ivan Boev, Vesna Cvetkov, Petre Makreski, Dušan Polomčić, Vesna Ristić Vakanjac (2024)
    Coal exploration is a very demanding task, highly dependent on geological and economic factors and the utilization of coal. This lecture text includes information on a variety of geological techniques used in the exploration of coal and coal-bearing sequences, as well as on the calculation, assessment, classification, and reporting of coal resources and reserves. The main features of coal utilization and some environmental aspects are explained briefly. Special attention is paid to the by-products of coal utilization, their uses, ...
    угаљ, истраживање, ресурси, резерве, коришћење, сагоревање, карбонизација, гасификација, угљенични материјали
    ... temperature (7), and diameter _o š o š Page 9of27 1 400SP(mV) T(C) 13 14 . 15 16 17 280 350 D(mm) LN(Om)O 65 200G (csp) SN(Om) 0 65 (D) of borehole (device Auslog, D. Nikolić/D. Milošević, Geo- ing Group d.o.o., 2011) 20 25 30 35 40 -45 50 55 60 borehole logging ...
    ... gravel, or broken solid rocks (Fig. 7). ChemTexts (2024) 10:1 Fig.7 Sandy sediments overlying coal (open-pit mine Field D of the Kolubara Coal Basin (Serbia; photo by D. Polomčić, 2006) Complex geologic settings of coal deposits are those that feature both underlying and overlying aquifers ...
    ... Sretenović B, Cvetkov V, Životić D (2016) Modelling of a coal seam of the deposit Durdevik (BiH) by means of 2D reflection seismic imaging. J Geophys Eng 13:422-428 https://www.rockware.com/logplot-image-gallery/. Accessed 25 Dec 2023 Dragišić V, Polomčić D (2009) Hydrogeological dictionary ...

  • Reconstruction of the Tethys' waning in the Balkans: New insights from Upper Cretaceous igneous formations and zircon provenance data

    Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković (2024)
    geochronology, zircon, provenance
    ... 1. Prelević, D., Wehrheim, S., Reutter, M., Romer, R. L., Boev, B., Božović, M. ... & Schmid, S. M. (2017). The Late Cretaceous Klepa basalts in Macedonia (FYROM) - Constraints on the final stage of Tethys closure in the Balkans. Terra Nova, 29(3), 145-153. 2. Van Hinsbergen, D. J., Torsvik ...
    ... Torsvik, T. H., Schmid, S. M., Matenco, L. C., Maffione, M., Vissers, R. L., Gurer, D., Spakman, W. (2020). Orogenic architecture ' of the Mediterranean region and kinematic reconstruction of ~its tectonic evolution since the Triassic, Gondwana Research, vol. &81, 79 – 229. 3. ...

  • Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić, (2019)
    ... area in Pannonian Basin, Serbia (Fig. 1). Gravity anomalies were calculated using density value of 2.30·103 kg/m3. Density-depth function (s = f(d)) in the Cenozoic sediments was defined as quartic polynomial, using data from density logging in the boreholes located in different parts of the Pannonian ...
    ... basement (gb) and of the first (gm1) and sixth (gm6) model, c) density contrast of the basement blocks for the first (b1) and sixth (b6) model and d) lateral density distribution of the basement along the profile after first (b1) and sixth iteration (b6). Procedure can be repeated as many times ...
    ... the Serbian Ministry of Education, Science and Technological Development (Projects no. 33003 and 176016). References Pigott J.D., Radivojević D., 2010. Seismic stratigraphy based chronostratigraphy (SSBC) of the Serbian Banat region of the Pannonian Basin. Central European Journal of Geosciences ...

  • The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin

    Filip Anđelković, Dejan Radivojević (2019)
    gornji miocen, litostratigrafske jedinice, formacije, Panonski basen

  • Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom

    Saša D. Bošković (2016-09-09)
    Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...
    rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energije

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)

  • 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 ...
    magnetit, hematit, hemoilmenit, Borska metalogenetska zona, porfirska ležišta

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija

  • Oдређивање броја камиона за транспорт руде на површинском копу Шупља стијена

    Грујичић Стефан (2024)
    Транспорт на површинским коповима се одвија паралелнпо са осталим процесима екаплоатације. Како не би долазило до непредвиђениих трошкова, потребно је усагласити све системе производње. Димензионисање адекватног транспортног система обезбеђује максималну продуктивност механизације и профитабилну експлоатацију. Чињеница да трошкови транспорта заузимају знатан део укупних трошкова иде у прилог томе да је одређивање потребног броја камиона за превоз откопаног материјала од великог значаја. У овом раду извршен је прорачун броја камиона потребног за транспорт руде од откопних етажа до дробилице на ...
    камионски транспорт, руда, транспортна траса, Талпак
    ... 000'SZZ 375 TarufiPTTEYi MHPn.Lyalnd]] c L z H.Lovđ Zenopuwex lods We.LOHJ H H T ' O H E H O d I | | W O L J H O H H Y O S E H O d I J | WoO.LJHO H H T O S H E H O d I I TE id 23 4 [3 TE / dego.L{ es E x H m e y lodo BHEh920d1I q TGI <0l /'01 CbI ...
    ... (uJeM CH twicOHda9HCW o e d g 9 L trL [1}7 [7 I L ćiL suj»i/utu ouHiUH OWS9UH UHh9JOU|I cgT O O H:i 4 4 [10 s T snpyio/urur eGegO1A ow9dd OHh930d|| 41 +0 I tšoO t#0 FI snp{o/urmu |edego,LA/JLJ9MW EH e e O H d g a H e M aWodgq [77.] 950 ...
    ... T19C'?05 S č A c / 0 9 T T D T I Z E 6 0 9 % 9 1 Y CuO) \Le.LHHUHCH HHm1HHITPD,] /'00 1 I L9LL [ 1 JEh WUHIfEd UU „Lo,LMIELUE}{ k A 433 [:}43 'UO} 150BHHJOH tEHh920d]I J q'EE RE G'EE BZ W'EE eUO} J,308H2O0H O E V O A J D A | S E V O A J O A | ...

  • Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia

    Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić (2022)
    The paper compares the flow regimes of the Resava River at the gauging stations of the Manasija Monastery (upper course) and the town of Svilajnac (lower course). The hydrological analysis encompasses a multiyear period of monitoring (1982–2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km2) and the Manasija Monastery station (358k m2), considering the overall monitoring period and characteristic years. The results indicate that the specific runoff in ...
    hydrogeological characteristics, water regime, water balance, karst aquifer, Resava catchment area
    ... main drain — the Resava River. References Avramović, D. 2005. Fkonomsko-ekološki aspekti ekspoloataci- e i gazdovanje zaštićenim prirodnim dobrima. Magistarski rad. Fakultet zaštite na radu, Univerzitet u Nišu, Niš, 228 p. Dukić, D., LJ. Gavrilović. 2014. Reke Srbije. Monografija, Za- vod ...
    ... highest discharge: an- nual average 14.64 m?/s at the Manasija Mon- astery and 18.9 m?/s at Svilajnac (1:1.3). In addition to hydrographs (Fig. 1a-d), the co- efficients of correlation are indicative of the cor- respondcnce of the discharges recorded at the up- strcam and downstream gauging stations ...
    ... ž Š w š š k i 33 Š o |}] E 40 || > o LJ 2808 888 8#8.8#8.4. 8 + žž BII II I I ŠGU 39 8B B ! Š Š 9 ž Š Š Š 3 'B B ! Š BI B R BO Cju.=<21”·(3320 d BB BSKSSBIBISB IBE —. at Manssin Mopasisty ——g:s. atvisjne ——>s at Manasija Monastery —-g.s. at Svilajnac Fig. 1. Catchment of the Resava River and ...

  • The Dictionary of the Serbian Academy: from the Text to the Lexical Database

    Ranka Stanković, Rada Stijović, Duško Vitas, Cvetana Krstev, Olga Sabo (2018)
    In this paper we discuss the project of digitization of the Dictionary of the Serbo-Croatian Standard and Vernacular Language. Scanning and character recognition were a particular challenge, since various non-standard character set encoding was used in the course of the almost 60-year long production of the dictionary. The first aim of the project was to formalize the micro-structure of the dictionary articles in order to parse the digitized text of and transform it into structured data stored in relational lexical database. This approach ...
    computer lexicography, lexical database, language resources, dictionary, Serbian language

  • The state and perspective of the natural gas sector in Serbia

    Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević (2016)
    The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...
    Consumption, natural gas, scenarios of development
    ... .imf.org/external/pubs/ft/weo/ 2011/01/pdf/text.pdf Ivezić, D., Živković, M., and Madžarević, A. 2012b. LEAP as a tool for planinig development of gas sector, Scientific conference Gas 2012, Kladovo (in Serbian) Ivezić, D., Danilović, D., Živković, M., and Madžarević, A. 2012 a, Natural gas sector ...
    ... of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=uesb20 Download by: [Narodna Biblioteka Srbije], [D. Ivezic] Date: 15 December 2016, At: 23:41 Energy Sources, Part B: Economics, Planning, and Policy ISSN: 1556-7249 (Print) 1556-7257 (Online) Journal ...
    ... reached. Minimal total consumption of 1,240 million m3 was reached in 1993, only three years after the achieved maximal consumption (Djajić, 2011). 1062 D. IVEZIĆ ET AL. Trend of consumption’s growth in the period 1996–1998 (with consumption of approximately 2.5 billion m3 per year) was interrupted in ...

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography
    ... d in Fig. 9c and d, the OM consists mainly of type II with the significant contribution of type I and type III kerogens. Higher values of HI (over 300 mg HC/g TOC) and S2/S3 (over 5) ratio are noticed for samples in which type I/II kerogens are pre- dominant (Table 6, Fig. 9c and d; Peters, 1986; Peters ...
    ... NCS FC 28009L, 2016. Certificate of Certified Reference Material, Coal. China National Analysis Center for Iron and Steel, China. Nelson, D., Knohl, A., Sachse, D., Schefuß, E., Kahmen, A., 2017. Sources and abundances of leaf waxes in aerosols in central Europe. Geochim. Cosmochim. Acta 198, 299–314 ...
    ... reservoirs: a case from Yanchang Formation, middle and southern Ordos Basin, China. Petrol. Explor. Dev. 37, 543–551. Zhu, Y., Weng, H., Su, A., Liang, D., Peng, D., 2005. Geochemical characteristics of Tertiary saline lacustrine oils in the Western Qaidam Basin, northwest China. Appl. Geochem. 20, 1875–1889 ...

  • Middle to Late Jurassic pelagites and gravity mass flow deposits of a displaced Neotethyan margin: Microfacies and biostratigraphical studies in Northeast Hungary

    János Haas, László Fodor, Nevenka Đeric, Ottilia Szives, Péter Ozsvárt, Melinda Fialowski, Szilvia Kövér (2024)
    mikrofacije, sedimentacija, srednja jura, gornja jura, biostratigrafija, Neotetis