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Упит dcterms_creator_txt:Kostić N. Bojan

975 items

  • 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
    ... of the universe of displacement as l =min∆VM×N and u =max∆VM×N , respectively. The observed data are sorted in ascending order. The distance of any two consecutive values of displacement is calculated as follows: d = |∆vi+1 − ∆vi|, i = 1, 2, . . . , (M× N)− 1, (16) Now it is necessary to compute the ...
    ... → v (t− 1) + → u (t), t = 1, 2, . . . , N , (1) where → v (t)—the position vector of the marker m in the current support configuration. → v (t− 1)—the position vector of the marker m in the previous support configuration. → u (t)—the vector of displacement. N—time of monitoring. Figure 2. Change of ...
    ... 2]. In conventional matrix form, the data of position of all markers obtained by scanning for 1 ≤ t ≤ N can be expressed by the time-dependent position vectors as follows: → V(t) = [→ v ij ] M×N =  → v 11 → v 12 → v 13 · · · → v 1N → v 21 → v 22 → v 23 · · · → v 2N ... ... ... . . ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • Terminology Acquisition and Description Using Lexical Resources and Local Grammars

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Biljana Lazić (2015)
    Acquisition of new terminology from specific domains and its adequate description within terminological dictionaries is a complex task, especially for languages that are morphologically complex such as Serbian. In this paper we present an approach to solving this task semi-automatically on basis of lexical resources and local grammars developed for Serbian. Special attention is given to automatic inflectional class prediction for simple adjectives and nouns and the use of syntactic graphs for extraction of Multi-Word Unit (MWU) candidates for ...
    ... 96 varalica alica N 5 f + N1651 27 1 4 Lalica ica N 3 m + N1683 145 142 98 Milojica ica N 3 m + N1741 145 3 2 Prica ica N 3 m/f + N683 40 33 83 tvrdica ica N 3 m/f + N679 40 7 18 ubica Table 1: Excerption from dataset with ending. (m: masculine gender; f: feminine gender; m/f: nouns change ...
    ... 39 41 43 45 47 49 V N A Proceedings of the conference Terminology and Artificial Intelligence 2015 (Granada, Spain) 83 ending POS length gender anim FST Total Frequency Rel. freq. Example alica N 5 f - N650 97 95 98 sijalica alica N 5 f - N1650 97 1 1 Skalica alica N 5 f + N651 27 26 96 ...
    ... 1993; Gelbukh et al., 2010). For grammatical correctness best precision at rank n (P@n) measure is very high (figure 6) and independent of the ranking (the trend is flat). Figure 6: Precision at rank n for all evaluated term candidates for grammatical correctness. In order to calculate ...

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... ca element (Dinarides).– Acta Geol. Hung., 34, 15–44. DJERIĆ, N., GERZINA, N. & SCHMID, M.S. (2007): Age of the Jurassic radiolarian chert formation from the Zlatar Mountain (SW Serbia).– Ofioliti, 32/2, 101–108. DJERIĆ, N., GERZINA, N. & SCHMID, M.S. (2012): Middle Jurassic radiolarian as­ semblages ...
    ... & GERZINA SPAJIĆ, N. (2019a): Late Triassic radiolarians from the Grivska Formation.– Geološki anali Balkanskoga poluostrva, 80/1, 17–27. BRAGIN, N.Y., BRAGINA, L.G., GERZINA SPAJIĆ, N., DJERIĆ, N. & SCHMID, S. (2019b): New radiolarian data from the Jurassic ophiolitic mélange of Avala Moun­ tain ...
    ... Djokov Potok creek to the west and uphill. The coordinates of the starting point of the section are N 43˚ 37’ 14.0” E 19˚ 50’ 56.1”. We studied and sampled the lower part of this section up to the point N 43˚ 37’ 16.0” E 19˚ 50’ 54.5”. The underlying formation is not visible at the surface. A geological ...

  • A transient three-dimensional numerical model of water impermeable screen effects on the groundwater inflow reduction into the mine (Case Study: Open pit mine Drmno, Serbia)

    Šubaranović Tomislav, Polomčić Dušan, Pavlović Vladimir, Pakić N (2011)

  • Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin

    Angelina Petrović, Aleksandar Mijatović, Rada Baošić, Jovana Bogojeski (2018)
    Joni prelaznih metala u kombinaciji sa različitim ligandima nude veliki broj mogućnosti za ispitivanje potencijalnih bioaktivnosti. Među jonima prelaznih metala, bakar je poznat kao endogeni metal za ljude, sa karakterističnim biološkim redoks aktivnostima i relativno jakim afinitetom za nukleobaze. Kompleksi bakra ispoljavaju svoju antitumornu aktivnost na nekoliko različitih načina, generišu veliku količinu ROS, što uzrokuje oksidativno oštećenje mitohondrija i biomakromolekula. Nađeno je da kompleksi bakra(II) imaju umeren do dobar afinitet vezivanja sa DNK, uglavnom putem interkalacije.

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... ——— FiuidLoad (Fo) 3297.05 N Rod Number Weight OfRods In Fluid (Wrf) 16844.8 — |N Rod Grade TotalLoad (Wrf +Fo) 20141.9 — |N ER u 00 WTW\SGSB.BS |Nm Rod 7 (0.875 inch) Fo/s«ooasm Rod 6 (0.75 inch) 1 /Kr 0.0017572 (n)b) CounterWeight Required (CBE), 19603 |N W CounterWeight Positon,0.63444 ...
    ... G — !MA ? 4 inQ: Crank rotation with well to right: CCW koad : 1,444 1,337 Max. cb moment (N-m): 744155 | 8533,54 Max. cb moment (N-m): Unknown Counterbalance effect(N}: 16935 19411 Structural unbalance (N): 63 Daih electr.use (Kwh/Day): 22 23 Crank offset angle (degrees): 00 Monthly electric bill: ...
    ... PROSPER AND QROD Table 6.2. Output Well XX-1 Method Results RODSTAR PROSPER QROD m3/D 103 110 10.51 Peak pol.rod load (N} N 24158 25574 21211 _ Min.pol. rod load (N} N 13944 11260.3 16230 Nm 2797 5658 200 In this paper, we presented three main software programs for designing sucker rod ...

  • WS4LR - a Worksation for Lexical Resources

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović (2006)
    Lexical Resources, Wordnet, Serbian
    ... sor.N2:ms1v), NC_AXN+N+Comp//full-time professor DELACF redovna profesora,redovni profesor .NC_AXN+N+Comp:mw2v redovne profesore,redovni profesor .NC_AXN+N+Comp:mp4v redovni profesor,redovni profesor .NC_AXN+N+Comp:ms1v redovnih profesora,redovni profesor .NC_AXN+N+Comp:mp2v B. Wordnet ...
    ... slatki i socyni sa karakteristicynim tvrdim zrncima. n ENG20-11902961-n hypernym ENG20-11902605-n holo_member ENG20-07295527-n holo_part C. Format ...
    ... ENG20-11902751-n n pear2 pear tree1 Pyrus communis 1 ENG20-11902961-n hyp ...

  • 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
    ... ISSN 1392-8716 [12] Bošković S., Kostić S., Cvetković M., Marković Z. (2000), Rezultati geoelektričnih istraživanja u cilju litološkog raščlanjivanja otkrivke na polju “B” površinskog kopa “Gračanica” Gacko, IMES, AranĊelovac [13] Bošković S., Vuković B., Lasica N. (2001), Ripovanje čvrstih stijena ...
    ... naĉin:        N i N i b N i p n j pr n j rb ttttT iijij 1 1 111 (3.99) gde su:N - broj pojaseva na visini bloka, N = H/(0,5  0,7)D, n - broj rezova na duţini bloka, n = Lb/d, i - broj pojasa, j ...
    ... Lapor kreĉnjaĉki 8N 22 60 - 180 22 - 38 3. Lapor 7 N 18 - 20 95 - 120 19 - 22 4. Glina-ugljevita i sivozelena 6 N 18 5 6 5. Sivozelena glina i glinoviti lapor 6 N 18 20 12 6. Ugalj, laporovit 6 N 14 50 22 - 54 7. Lapor glinovit 5 N 19 87 13,5 8. Odloţeni materijal 17,77 31,64 15,52 ...

  • Evolution of the Alpine Tethys (Sava) suture zone in Fruška Gora Mountains (N Serbia): from orogenic building to tectonic omissions

    Toljić Marinko, Matenco Liviu, Đerić Nevenka, Milivojević Jelena, Gerzina Nataša, Stojadinović Uroš (2010)

  • Hydrogeothermal potentials of Rogozna mountain and possibility of their valorization

    D. R. Ivanović, Dj. A Valjarević, R. D. Srećković-Batoćanin, N. M. Martić-Bursać, D. Ž. Vukoičić, R. M. Ivanović (2020)
    Geotermalna energija, hidrogeotermalni potencijal, stepen iskorišćenja, banja, Rogozna, Srbija

  • Energetska bezbednost sektora prirodnog gasa Srbije

    Aleksandar Madžarević, Predrag Jovančić, Miroslav Crnogorac (2023)
    U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gasom domaćeg tržišta bio je jedan od prioriteta razvoja energetike Srbije. Istovremeno, aspekt sigurnog snabdevanja bio je neizostavni deo slagalice stvaranja energetske bezbednosti. Izražena uvozna zavisnost je dominantna karakteristika sektora prirodnog gasa, tačnije, Republika Srbija je snažno zavisna od ruskog gasa, sa više od 80% uvezenih količina gasa, a do pre dve godine snabdevala se isključivo kroz jednu interkonekciju. U radu se razmatra aktuelna situacija u sektoru prirodnog ...
    N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja
    ... oblast Procesne tehnologije Naslov Energetska bezbednost sektora prirodnog gasa Srbije Ključne reči (maksimum 5 reči) Sažetak (do 300 reči) N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gas- om domaćeg ...
    ... sektora na prekide u međunarodnim lancima snabdevanja. Kroz rad je izvršena analiza energetske bezbednosti sektora prirodnog gasa primenom indeksa N-1, indeksa IDUPS i par- ametra razvoja infrastrukture sektora. Ova tri parametra opisuju raspoloživost sistema u tehničkom smislu, diversifikaciju ...
    ... to interruptions in international supply chains. Through the paper, an analysis of the energy security of the natural gas sector assessed by the N-1 index, IDUPS and the parameter of infrastructure development of the sector was carried out. These three parameters describe the availability of ...

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... dominantly dextral, with NNE-SSW to N-S oriented faults in the northern and central parts (Figs. 8, 9a,b) and further to NNW-SSE to NW-SE more southwards in the studied area (Figs. 8, 9c). Conjugate sinistral faults are commonly observed, varying in orientation from NE-SW to N-S oriented faults (Figs. 8, ...
    ... the photos are plotted in stereoplots. a) Dextral, N-S oriented strike-slip fault (green arrow) truncating older thrusting related foliation in weakly metamorphosed Upper Jurassic limestones of the Upper Getic sub-unit. Studied site Tu1. b) Dextral, N-S oriented strike-slip fault offsetting tilted Lower ...
    ... Andrić, N., Sant, K., Matenco, L., Mandic, O., Tomljenović, B., Pavelić, B., Hrvatović, H., Demir, V., Ooms, J., 2017. The link between tectonics and sedimentation in asymmetric extensional basins: inferences from the study of the Sarajevo–Zenica Basin. Mar. Pet. Geol. 83, 305–332. Andrić, N., Vogt ...

  • A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor

    Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić (2023)
    železnica, prekogranični teretni saobraćaj, ARIMA, LSTM, SSA

  • Збирка задатака из Механике 1 и Отпорности материјала

    Aна Петровић, Инес Гроздановић (2023)
    статика, отпорност материјала
    ... ocno0Dahajy ce peakuuvjja Be3a M yHOCe ce akTMBHe CUne. 20 36upka a3anaTaka v3 MexaHuke 1 ı OrnopHocTu MaTepujana AA +N„·l„_3Pl+(–2P)l_Pl E Egl·A, EA EBA EA A A N;·l, _ PL _ (8P)L _5Pl DD_ cTE.A, FA EQ4 BA YupraBajy ce no0ujeHa roMepaM-a y onroBapajyhuM ripeceuua (Cnavka 2.6). UlTo ...
    ... neueM060pa 2022. ronMHe AyTopu CucrTeMu cuna 1.2.2 PABAHCKM ITPOM3BOJbHM CMCTEMM CMJIA S3anarak 1.5 XowMoreHu ıuTar,, colcTBeHe TeXMHe G = 500 N, nyx\MHe | = 6m ocnaWkoa ce Ha BepTMKa;HM 30n y TaukM B M xXOpM3OHTa;bHHM ron y Tauku 4. TloMohy xXopM3OHTajHoOr HeMCTeTJbMBoOr yxeTa DC utran je ...
    ... 3HauM ma Cy peakuMje CaMO HOpMaruHe peakuuje, W na HeMa cune Tpetba. O0jekaT nocMaTpaM-a je urTan, ocno0afj)a ce peakuuvja Be3a. „Cknakbba“ ce av/n y TaukM B, peakuuja avna je ynpaBHa Ha 3M/R (xXOpM3OHTaluba), „cknaMba“ ce no/i y TaukM 4, peakuuja je BepTMKanHa (ynpaBHa Ha noM). YknaWa ce yxe ...

  • Burnishing Versus Smoothing In Ceramic Surface Finishing: A Sem Study

    Ionescu Corina, Volker Hoeck, Crandell Otis N., Šarić Kristina (2014)
    From the Neolithic up to the present, people have used various methods to improve the surface of ceramic objects. In this study, we look specifically at smoothing and pattern burnishing of ceramics produced today by traditional methods. Optical microscopy and SEM show specific surface changes. Smoothing results in an irregular surface, which causes diffused reflection of light. Burnishing produces an even and compact surface, which causes specular reflection and lustre. The results can be used to infer methods of ...

  • Microemulsion with aromatic oil as cleaner media for electropolymerisation

    M. Ilić, F.-H. Haegel, S. Zlatanovic, N. Potkonjak, B. Simonovic (2005)
    Abstract Microemulsion polymerization is widely used as a cleaner alternative way to prepare intrinsically conductive polymers. We studied isothermal phase diagrams for microemulsions of the electropolymerizable heterocyclic aromatic oil 3,4-ethylenedioxythiophene (EDOT), aqueous LiClO4 solution and alkyl polyethoxylate. Our specific goal was to assess the effect of LiClO4 salt on the phase behaviour. The phase behaviour was characterized by stepwise titration and microscopic analyses. Here we found that the increase of the concentration of LiClO4 salt shifts the microemulsion region ...
    Микроемулзија, понашање фаза, EDOT, LiClO4

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)
    ... samples, n-alkanes prevail, followed by hopanoids and diterpenoids, while steroids, non-hopanoid triterpenoids, fernenes, sesquiterpenoids, and isoprenoids are present in low concentrations. An exception is Middle Miocene sample, which is characterized by a higher abundance of hopanoids than n-alkanes ...
    ... activity that favours decomposition of wood tissues. In all samples long-chain n-alkanes (C26–C33) are the most abundant, exhibiting notable odd- over even predominance. The elevated contents of mid- chain, C23 and C25 n-alkanes, resulting in higher Paq index, are observed in Lower Miocene samples ...
    ... precursor OM. However, the Di/(Di+Tri) ratio < 0.5 (Bechtel et al., 2003) suggests a greater contribution of angiosperms. The contents of C27 and C29 n-alkanes in relation to C31 and C33 homologues imply similar impact of forested and reed-mire vegetation. The presence of tricyclic (abietane, pimarane ...

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... for their cytotoxic properties, such as polypyridyl complexes cis-[Ru(N,N-bpy)2Cl2] and mer-[Ru(N,N,N- trpy)Cl3] [12, 13], aminocarboxylato complexes [Ru(N,- N,O,O-pdta)Cl2] (pdta = 1,2- propylenediaminetetraacetato) and [Ru(N,N,O,O,O-edta)Cl] (edta = ethylenediaminete- traacetato) [14, 15], dime ...
    ... from the intercept of the observed lines (Fig. 2). It is very small and contributes little to kobsd. N Ru NN N Cl N NH N N O NH2 N O H HH HH OH OPO O O H2N CH C CH2 OH O N NH H2N C NH2 S H3C S CH3 O DMSOTuL-His 5'-GMP[Ru(trpy)(bpy)Cl]+ Fig. 1 The structures of complex ...
    ... dimethylsulfoxide complexes cis- and trans-[Ru(S-DMSO)4Cl2] [16–18], and arylazopyrdine complexes [Ru(N,N,N,N-azpy)2Cl2] (azpy = 2-phenylazo- pyridine) [19, 20]. More recently, two classes of structurally similar Ru(III) complexeswere synthesized and investigated for antitumor activity: [HL]trans-[RuCl4L2] ...