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Упит dcterms_creator_txt:Dražana M. Tošić

983 items

  • In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge

    Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić (2023)
    The biological activity of six structurally similar tetradentate Schiff base copper(II) complexes, namely [Cu(ethylenediamine-bis-acetylacetonate)] (CuAA) and five derivatives where two methyl groups are replaced by phenyl, (CuPP), CF3 (CuTT) or by mixed groups CH3/CF3 (CuAT), Ph/CF3 (CuPT), and Ph/CH3 (CuAP) has been investigated. The set of antioxidant assays was performed, and the results were expressed as IC50 and EC50 values. The series of complexes showed interesting bioactivity and were investigated for the determination of antioxidant, antifungal, antimicrobial, and cytotoxic ...
    Inorganic Chemistry, Biochemistry

  • Development of terminological resources for expert knowledge: a case study in mining

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić (2015)

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... Manual. 2015, Paris: Université Paris-Est Marne-la-Vallée. [12] Gross, M., The use of finite automata in the lexical representation of natural language, in Electronic Dictionaries and Automata in Computational Linguistics, M. Gross and D. Perrin, Editors. 1989, Springer Berlin Heidelberg. p. 34-50 ...
    ... Electronic Dictionaries. Prace Filologiczne, 2012. LXIII: p. 279-292. [14] Utvić, M., Izgradnja referentnog korpusa savremenog srpskog jezika. 2014, Univerzitet u Beogradu, Filološki fakultet: Beograd. [15] Radojičić, M., et al., Creating an environment for free education and technology enhanced learning ...

  • 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
    ... 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 fuzzy ...
    ... the “Bezdan 1” PS, were defined as follows: • Alternative 1 (A1): Long-term average stages of the canals within the study area (Baračka Canal 82.80 m above sea level and Bezdan–Vrbas Canal 84.80 m.a.s.l.) were used in the predictive hydro- dynamic analysis. The groundwater control sys- DRAGOLJUB BAJIĆ ...
    ... this method are presented below in several steps. The basic concept of the FAHP approach is the tri- angular fuzzy number. If this number is denoted by M(l,s,d), as illustrated in Fig. 3, it is defined by its membership function as follows: The correlation between the numerical values of triangular fuzzy ...

  • Analysis of the exhaust emissions inventory from auxiliary mining machines

    Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)
    Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...
    emissions, mining, auxiliary machines

  • Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje

    Stevan Đenadić, Aleksandar Mirković, Veljko Rupar (2024)
    Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...
    rudarstvo, digitalna transformacija, baze podataka
    ... u skladu sa potrebama osobe koji ih zahteva. Primer izveštaja dat je na Slici 4. 79 Expoitation Stockyard Summary- 46000 2600 10429 3068 70 m [H 33 2 Slika 4. Primer izveštaja o preradi i proizvodnji rudnika (izvor: Rocksolid Tech, MMS) 3.1. Ispitivanje stanja u rudarstvu i tržišta za dalji ...
    ... Ciljna grupa su bili kako površinski tako i podzemni rudnici u Republici Srbiji i okruženju. Rezultati sprovedene ankete prikazani su u nastavku. M O O B O O — Prvo pitanje: U odnosu na prethodne aktivnosti vaše kompanije, podaci su se skupljali primenom? Odgovori su bili sledeći: papirna ...
    ... A.C. (2004). Information technology and the good life. Information system research, s. 687-692. [5] de Sousa, J. S., Rocha, L. O., & de Castro, R. M. (2016). Digital transformation applied to Bauxite and Alumina Business System: BABS 4.0. In Proceedings of 37th International ICSOBA Conference, pp ...

  • Analiza primenjenih metoda za transport parafinske nafte

    Dunja Milojević (2024)
    Sadržaj parafina u nafti ima dominantan uticaj na svojstva parafinskih nafti. Taloženje parafina, odnosno taloženje čvrstih čestica parafinskog voska, predstavlja ozbiljan globalni problem tokom proizvodnje i transporta sirove nafte. Samo taloženje voska zavisi od termodinamičkih faktora, poput temperature, pritiska i sastava nafte. Transport nafte cevovodima je uobičajeni proces transporta u naftnoj industriji. Kada prilikom cevovodnog transporta parafinske sirove nafte, dođe do prekida protoka i hlađenja nafte ispod temperature stinjavanja, parafini će kristalisati, pri čemu će doći do, geliranja celokupne transportovane ...
    nafta, parafinski vosak, taloženje, transport, naftovod
    ... 7) Naftovodi se najčešće ukopavaju u zemlju na dubini od 0,80 — 1,50 m, mereno od površine zemlje do gornje ivice cevovoda. Ponekad se magistralni naftovodi polažu iznad zemlje na betonskim stubovima visine 0,50 – 0,75 m. Način polaganja magistralnih naftovoda može da bude ispod mora i jezera ...
    ... Of6paaau 2 H3JABA O HCTOBETHOCTH IITTAMITAHE, M EJIEKTPOHCKE BEP3HJE 3ABPIIIHOT PAJIA e (HMe pojiHTeJba) H npe3HMe cTyJleHTa , ip (HEE=o; ura ) /V{a, qo:cpu Bpoj aHneKkca __AA /1+ Cryujcku nporpaM _l|/{H>6« cCMeE Pćiteo _ HdlcoeTE M r«+CA Hacnon pana ___/lL 44 sA _THNOVIAA E |b &-H- ...
    ... Zagrevanje bušotinskog naftovoda sa grejnim kablom (Danilović d& sar., 2012) 27 Za zagrevanje se koriste grejni kablovi odgovarajuće snage 5 i više W/m. Sistem ima automatsku kontrolu rada u zadatom temperaturnom opsegu. Posebnu pogodnost predstavlja mogućnost rada sistema sa 1/3 snage. Nakon podizanja ...

  • Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)

    Dejan Radivojević, Ljupko Rundić (2017)
    ... of Pannonian Basin. JELENKOVIĆ, R., KOSTIĆ, A., ŽIVOTIĆ, D. & ERCEGOVAC, M. (2008): Mineral resources of Serbia. Geo- logica Carpathica, 59/4, 345–361. MAGYAR, I., RADIVOJEVIĆ, D., SZTANÓ, O., SYNAK, R., UJSZÁSZI, K. & PÓCSIK, M. (2013): Prograda- tion of the paleo-Danube shelf margin across the Pannonian ...

  • In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge

    Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić (2023)
    The biological activity of six structurally similar tetradentate Schiff base copper(II) complexes, namely [Cu (ethylenediamine-bis-acetylacetonate)] (CuAA) and five derivatives where two methyl groups are replaced by phenyl, (CuPP), CF3 (CuTT) or by mixed groups CH3/CF3 (CuAT), Ph/CF3 (CuPT), and Ph/CH3 (CuAP) has been investigated. The set of antioxidant assays was performed, and the results were expressed as IC50 and EC50 values. The series of complexes showed interesting bioactivity and were investigated for the determination of antioxidant, antifungal, antimicrobial, and ...
    Inorganic Chemistry,Biochemistry

  • Projected changes in air temperature, precipitation and aridity in Serbia in the 21st century

    Boško Milovanović, Sebastian Schubert, Milan Radovanović, Vesna Ristić Vakanjac, Christoph Schneider (2021)
    In this study, the projected changes of the average monthly and annual air temperatures, precipitation amounts and De Martonne aridity index in Serbia in the 21st century are examined. For that purpose, the spatial distribution of air temperature and precipitation amount is statistically modelled using data of 64 climatologic stations and 421 precipitation stations for the period 1976–2005 using multiple linear regression. The De Martonne aridity index is calculated from the spatially distributed data. In order to obtain regional ...
    21 vek, temperatura vazduha, klimatske promene, De Martonne-ov indeks ardinosti, padavine, Srbija

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... Resources and Evaluation, LREC 2006, Genoa, Italy, pp. 1692-1697, 2006. [7] M. Silberztein, “ INTEX: a Finite State Transducer toolbox”, in Theo- retical Computer Science, vol. 231, no.1, pp.33-46, Jan 2000. [8] S. Paumier, “M anuel d’utilisation du logiciel Unitex”, IGM, Université de Marne-la-Vallée ...
    ... http://www-igm.univ-mlv.fr/~unitex/ manueluni- tex.pdf , 2002. [9] M. Silberztein, “NooJ: an Object-Oriented Approach”, in INTEX pour la linguistique et le traitement automatique des langues . C. Muller, J. Royauté, M. Silberztein, Eds. Cahiers de la MSH Ledoux, Presses Universitaires ...
    ... usage o some WS4LR functions, with the possibility of access to the WS4QE web application, is also being considered. REFERENCES [1] B. Courtois, M. Silberztein, (eds.), Dictionnaires électroniques du français . Langue française 87, Paris, Larousse, 1990. [2] D. Tufiş, (ed.), Special Issue ...

  • A bilingual digital library for academic and entrepreneurial knowledge management

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Dalibor Vorkapić (2015)
    A generic knowledge management process of organization, storage and retrieval of knowledge can suitably be fitted in a digital library. In the digital and knowledge age digital libraries can be used in knowledge management to handle intellectual assets and support knowledge creation. A multilingual digital library either stores content in more than one language or provides multilingual query access to monolingual content. In Serbia 18 of 308 scientific journals regularly published are bi-lingual, with papers simultaneously being in English ...
    Knowledge management, Digital library, Multilingualism, Language Resources, Terminology
    ... Marrakech, Morocco. Lesk, M. (2005) Understanding digital libraries. Elsevier, San Francisco. Linzalone, R. (2008), “Leveraging knowledge assets to improve new product development performances”, Measuring Business Excellence 12(2), pp. 38-50. Lytras, M., Sicilia, M. A., Davies, J., & Kashyap, ...
    ... system: A theoretical perspective", Library Review, Vol. 58 Iss: 5, pp. 372 – 386. Stanković, R., Krstev, C., Obradović, I., Trtovac, A., Utvić, M. (2012a), A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals, in Proceedings of the 8th International Conference on Language ...
    ... Proceedings of the Third International Conference on e-Learning, eLearning-2012, ed. D. Milošević, Belgrade Metropoloitan University, Belgrade. Utvić, M. Stanković, R.Obradović, I. (2007) Integrisano okruženje za pripremu paralelizovanog korpusa, in Zbornik radova međunarodnog simpozijuma Razlike između ...

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија
    ... ne sediments in northern Banat region,  PhD thesis, University of Belgrade ‐ Faculty of Mining and Geology, 167 pp.  Sztano, O., Kovač, M., Magyar,  I., Šujan, M., Fodor, L., Uhrin, A., Rybar, S., Csillag, G., Tokes, L., 2016,  Late Miocene  sedimentary  record  of  the Danube/Kisalfold  Basin:  in ...
    ... junction  area  between  the  Carpathians  and  Dinarides, Tectonics, v. 31, TC6007.  Magyar  I.,  Juhasz,  Gy.,  Szuromi‐Korecz  A.,  Sutő‐Szentai,  M.,  2004,  The  Totkomlos  Calcareous  Marl  Member  of  the  Lake  Pannon  sedimentary  sequence  in  the Battonya‐Pusztafoldvar  region,  SE  Hungary ...

  • Overview of the hydrogeological investigations of recently discovered world class deposits in Serbia

    Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović (2019)
    Europe industry has growing concerns on availability of the raw materials. To address this challenge, the European Commission has created a list of critical raw materials for the EU, launched EIT Raw Materials initiative, and continuously support research projects (like INTRAW, UNEXMIN etc.) with the aim of reducing the dependency and meeting growing demands. In the last 15 years Serbia is experiencing new bust in geological exploration of mineral deposits. Currently 167 exploration licenses are active, covering approximately 6000 ...
    Groundwater, Raw materials, Lithium, Mining, Field hydrogeology

  • The impact of temporal variability of groundwater levels on groundwater vulnerability maps in karst terrains – a case example of the Perućac spring catchment area

    Vladimir Živanović, Igor Jemcov, Nebojša Atanacković (2022)
    Groundwater vulnerability maps represent an essential tool for protecting karst groundwater resources. Vulnerability assessment is usually based on spatial evaluation of various parameters that affect the vulnerability degree and regulate the protection role of the unsaturated zone. Most of these parameters, like soil and geology conditions, are constant and do not change during the year or over several years. In contrast, some parameters, such as the groundwater level, depend on the variability of recharge conditions. By considering the variability ...
    karst groundwater vulnerability maps, parameter changes, Perućac spring, Serbia

  • Hydrochemical indicators of groundwater flow in the area of “Čukaru Peki” Cu-Au underground mine in eastern Serbia

    Nebojša Atanacković, Vladimir Živanović, Jana Štrbački, Veselin Dragišić, Ivana Cvejić (2022)
    The physical and chemical properties of groundwater, together with the groundwater levels regime and rock hydraulic properties, are often used to understand and conceptualize the hydrogeological system. Prediction of the influence of mining works on groundwater, and vice versa, is a challenge due to significantly altered groundwater flow patterns in the raw materials exploitation areas in relation to natural conditions. Therefore, multiple parameters are assessed and monitored before and during exploitation to properly characterize and quantify the system for ...
    mine water, hydrogeology, multivariant statistics, groundwater inflow, water quality

  • Regional Strike-Slip Structures in the Internal Dinarides: Insights from the Zvornik Fault

    Ana Mladenović, Violeta Gajić, Kristijan Sokol, Dejan Prelević (2024)

  • 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

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... All charts in the following sections are normalized. Group A Loads + XgB+ - Foomer [7% Fowner+XgB Wavelet+ - Wavelet+ - Wavele NoTu m Accuracy MFIMacro m MCC Figure 6.11 Metrics Jor Group A 62 In Group B, all classes had 30 samples in the training set. Tests were conducted using all ...
    ... Hpcpajić, aKO CC HaBCJIĆ HMC ayTOpa Ha HauHH OJIpcbcH OJL crpaHc ayropa M maBaoma HHCHHC. OBa IHCHHA HC /IO3BOJbaBa KOMCpUMjaJIHy ynorpeOy /nena. AyTopcrBo — HeKOMepmHjajnmHo — 0Oey mpepama. /loaBojbaBaTe YyMHO;KaBaMČ, mucrpHOymujy M jaBHO caommrraBaHbC JIČMa, Oc3 IIpOMCHa, IIpeOOJmMKOBaMba HJIH yl'lOTpCČC ...
    ... operation. 12 b o ' Li L “ [] LJ ? LI vromoe (%5e0C}) Figure 3.1 time functions of load and stroke of the smooth rod Š·o i E PR N a a m e .'! ” L A_'A––––Ev @llšsss·zlll B dı | | | oO e % 2 «0 bl · tod glatko Sipko S(cm) Figure 3.2 Dynamograms of downhole pump operation: a})load ...

  • 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