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Упит dcterms_creator_txt:Vesna M. Pavelkić

1163 items

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)

  • Метода променљивих околина за решавање проблема p-центра са поузданом мрежом

    Јована Рађеновић, Стефан Мишковић, Оливера Станчић (2023)
    У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...
    Проблем p-центра, Робусна оптимизација, Метода променљивих околина

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... density, γ = 24 kN/m3; ‚ angle of internal friction, φ = 52˝; ‚ porosity, p = 3.5%; ‚ velocity of longitudinal waves, cp = 2400.00 m/s; ‚ velocity of transverse waves, cs = 1400.00 m/s. 4.1.2. Method of Blasting in the Veliki Krivelj Open Pit The measurements of shocks resulting from blasting in the Veliki ...
    ... cartridge length of 0.15 m, and a cartridge weight of 0.1 kg. An electric capacitor was used for initiation of the explosive. During experimental investigations performed in the Veliki Krivelj Open Pit, the following blasting parameters were specified: ‚ depth of borehole: 0.5 m; ‚ weight of explosive ...
    ... explosive charge per borehole: 0.10 kg; ‚ number of boreholes: 10; ‚ distance between boreholes: 1.0 m; ‚ distance between measuring point and the first borehole: 5.0 m; and ‚ delay time between initiation of boreholes: 0.5 s. Figure 3 shows a record of the soil oscillation velocity for blasting in the Veliki ...

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach

    Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)
    Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...
    pyrazoloquinolinones, nanocrystals, wet media milling, fasted/fed bioavailability
    ... Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Overcoming the Low Oral ...
    ... Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić | Pharmaceutics | 2021 | | 10.3390/pharmaceutics13081188 http://dr.rgf.bg.ac.rs/s/repo/item/0005481 Дигитални ре ...
    ... Knutson 3 , Jelena B. Ðoković 1, Aleksandar Kremenović 4 , Vladimir D. Dobričić 5, Danijela V. Randjelović 6, Ivana Pantelić 1 , James M. Cook 3 , Miroslav M. Savić 2 and Snežana D. Savić 1,* ���������� ������� Citation: Mitrović, J.R.; Divović-Matović, B.; Knutson, D.E.; Ðoković, J.B.; ...

  • Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer

    Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)
    ... with impermeable strata. Sandy-gravel sediments represent major aquifer systems. Their thickness varies from less than 10 m up to 50 m, but is generally of the order of 10 to 20 m. The transmissivity coefficient ranges from 10-s to I0 a m2 s 1. The semi- permeable or fu1ly-impermeable sandy clays ...
    ... 6 Djurif, D., Josipovid, J.,Zogovi{D.' I(omatina, M., Stevanovi{ 2., Diokt{ I. and Luk16, V. (2005) ICPDR Roof Report {or 2004,lnstitute WM "iarosiav Cerni", Document of MinistrY of Agrlculture Forest and Wateq Belgrade. 7 Soro, A., Dimki6, M. and |osiPovi6, ]' (1997) Hydrogeological investigations ...
    ... Management Multidisciplinary Approach Edited by Jacques Canoulis, Alice Aureli, and Jean Fried T'ransbou ndary Water Resou rces &rtranagement A M ultidisciplinary Approach WILEY- vcH WILEY-VCH Verlag CrnbH & Co. KCaA i: 4.9 Towards Sustainable Management of Transboundary Hungarian-serbian ...

  • Uticaj utiskivanja gas-lift gasa na prenos mase i toplote

    Branko Grubač (2019)
    Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... 𝑑𝑝𝑑𝑧 – Gradijent pritiska (kPa), 𝑔𝐶 – Konverzioni faktor (kg-m/Ns-2), 𝜌𝑚 – Gustina smeše (kg/m3), 𝑣𝑚 – Superkritična brzina smeše (m/s), 𝑔 – Gravitaciono ubrzanje (m/s2), 𝐷 – Prečnik cevi (m), 𝑓𝑚 – Faningov koeficijent trenja (m/s2). Efekat temperature utisnutog gas-lift gasa na profil ...
    ... faze – u kontrolnoj zapremini, 𝑣𝑠 = 𝑣𝑆𝐺 + 𝑣𝑆𝐿 – Brzina smeše gasa i tečnosti (m/s), 𝑣𝑆𝐺 – Brzina gasa (m/s), 𝑣𝑆𝐿 – Brzina tečnosti (m/s), 𝑣𝑇 – Tranziciona brzina (između dva oblika protoka) (m/s), 𝐴 – Poprečni presek cevi (mm2), 𝜌𝐿 – Gustina tečne faze (kg/m3). Pri definisanom ...
    ... 𝑘 6.1 6.2 6.3 Gde je: 𝑇1 – Temperatura u tubingu (K), 𝐴 – Funkcija vremena (m), 𝑎 – Geotermalni gradijent (K/m), 𝑏 – Površinska temperatura (K), 𝑍 – Dubina merena od površine zemlje (m), 𝑇0 – Površinska temperatura fluida koji se utiskuje (K), 𝑐 – Specifična toplota na konstantnom ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia

    Predrag Radović, Miloš Radonjić, Emmanuel Billia (2020)
    Finds of Pleistocene rhinoceros are rare in Serbia, and only one species (the woolly rhinoceros Coelodonta antiquitatis Blumenbach, 1799) has been reported so far. The current paper presents the dental material of an extinct so-called Hundsheim rhinoceros, Stephanorhinus hundsheimensis Toula, 1902 from Bogovina Cave (East ern Serbia). Both the morphological and metric characteristics of the teeth are consis tent with the attribution to S. hundsheimensis. Unfortunately, the rhinoceros material originated from an uncertain geological context, so there is no ...
    rhinoceros, Stephanorhinus hundsheimensis, Serbia
    ... , Ramos-Madrigal, J., Samodova, D., Rüther, P.L., Fotakis, A.K., Lyon, D., Moreno-Mayar, V.J., Bukhsianidze, M., Jersie-Christensen, R.R., Mackie, M., Ginolhac, A., Ferring, R., Tappen, M., Palkopoulou, E., Dickinson, M.R., Stafford Jr, T.W., Chan, Y.L., Götherström, A., Nathan, S.K.S.S., Heintzman ...
    ... teeth of Stephanorhinus hundsheimensis from Bogovina Cave: right M1/M2 HMP-136 in (A) occlusal and (B) lingual views; right M HMP-132 in (C) occlusal and (D) vestibular views; right M HMP-134 in (E) occlusal and (F) vestibular views; right DP4 HMP-130 in (G) occlusal and (H) vestibular views. PALAEO ...
    ... of the Upper Pleistocene from Valdegoba (Burgos, Spain). Bulletin of the International Association for Paleodontology, 2(2):21-6. Ballatore, M. and Breda, M. 2013. Stephanorhinus hundsheimensis (Rhinocerontidae, Mammalia) teeth from the early Middle Pleistocene of Isernia La Pineta (Molise, Italy) ...

  • Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema

    Svetlana M. Štrbac-Savić (2016-06-10)
    Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...
    podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija
    ... con con mr con con m m m m m m             53,8 8 100 85,13; 85% 53,8 mr m     85 85 85 85 85 Cena metala Cinka (USD/t) 2160 2195 1950 1910 2160 Jedniniĉna vrednost prodajne cene koncetrata metala (USD/t)   0,85con con mr V P m m P    1836 1866 ...
    ... 01 , 2 , ,m m m mX x x x k    38 Siva diferencijalna jednaĉina MGM(1, m) prvog reda je:             1 1 11 1 2 m j j j dx k ax k b x k dk    (3.19) Saglasno sa MGM(1, m), konstruisana AGO sekvenca je:            0 1 1 1 1 2 m j j j ...
    ... ... 3 2 2 2 2 3 3 3 , ... m m m Y B n n x z x x x z x x x n z x x n                               (3.23) Na kraju, MGM(1, m) moţe biti definisan na sledeći naĉin:           1 1 1 1 11 1 2 2 3 3 m m dx ax b x b x b x dk     ...

  • 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

  • Dimenzionisanje deponija za ugalj

    Dinko Knežević, Božo Kolonja, Ranka Stanković, Aleksandra Tomašević, Dragana Nišić (2014)
    ... lokaciji potrošača) koristi samo kao rezerva. -100 -50 0 50 100 150 Ja nu ar Feb ru ar M ar t A pr il M aj Ju n Ju l A vg ust S ep te m ba r O kt oba r N ove m ba r D ece m ba r mesec od no s pr oi zv od nj e i p ot ro šn je u gl ja , h ilj ad a to n a ...
    ... a raspoloživi odlagači i izuzimači omogućavaju visine deponija i iznad 22 m. Međutim, valja računati i na mogućnosti mašina kojima se ugalj odlaže i izuzima. Odlagači obično rade u rasponu brzina 4-20 m/s, a izuzimači 1- 6 m/s. Za obe mašine je bolje da rade sa manjim brzinama. Ako je dužina deponije ...
    ... Republike Srbije. LITERATURA 1. Dröttboom M., (2012), Stacking, Blending & Reclaiming, Bed Blending Efficiency – Adding Value with Stockyard Systems, http://www.process- worldwide.com/ index.cfm?pid=9890&pk=385896&fk=520501&op=1&type= article#1 2. Perišić M. et al., 1982, Utvrđivanje potrebnih veličina ...

  • Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje

    Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović (2021)
    U radu su analizirani eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje. Period analize je prvih šest meseci tekuće godine. Analiza je vršena sa aspekta ostvarene proizvodnje, kvaliteta uglja, efektivnog vremena rada, kapacitetnog i vremenskog iskoršćenja i zastoja sistema. Za poređenje podataka različitih parametara koji po svojoj prirodi nisu međusobno uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja.
    proizvodnja uglja, zastoji, metode višekriterijumskog odlučivanja
    ... zastoji po w Efektivmo vreme rada “.Ukupni zastoji 12 12 ... ... m m CCC www 111121 221222 12 ... ... ... m m nnnnm Axxx Axxx M Axxx éù êú êú = êú êú ëû MMMMM * max min iij j iij j xx xx - = = * * 1 * * () () () max () n ...
    ... * * min;max min;max jj j j jj j j SSSS RRRR - - == == 1 ... n CC 1111 1 ... ... n mmmn Axx M Axx éù êú = êú êú ëû MMOM 2 1 1,..., ; 1,..., n ij ij m ij i x rimj x = === å max , 1,..., ; 1,..., n ij ij i x rimj x === , 1,..., ; 1, ...
    ... dok je negativno „idealno“ rešenje sačinjeno od svih negativnih vrednosti [10]. Matematička interpretacija metode TOPSIS započinje formiranjem matrice M: (6) gde su: A1,…,Am alternative, C1,…,Cn kriterijumi, xij je rang alternative prema kriterijumu. U sledećem koraku vrši se normalizacija ...

  • Using gravity data to define structural correlation affecting the formation of Neogene basins

    Snežana Ignjatović, Ivana Vasiljević, Branisav Sretković, Milanka Negovanović (2023)
    A gravity survey can help to define the structural correlation in the study area. The structures that have influenced the development of Neogene basins can be defined using gravity data. By applying mathematical transformations to gravity data, the geological structures (faults, nappes, etc.) that impacted the formation of Neogene basins can be defined. We have taken the part of the Dinarides as the test region. The paper presents the results obtained using the procedure residual, vertical gradient, and total ...
    gravity survey, mathematical transformation, basin

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... chemicals from layers of ash and slag, and their input in the bearing environment [21]. 5 References [1] Šmelcerović, M.; Đorđević, D.; Novaković, M.; Mizdraković, M. Decolorization of a textile vat dye by adsorption on waste ash. // Journal of the Serbian Chemical Society. 75, (2010), pp ...
    ... Test method for the determination of the modulus of elasticity of hydraulically bound mixtures // (2003). [21] Šešlija, M.; Stojanović, M.; Radović, N.; Radonjanin, V.; Malešev, M. Use of fly ash for embankment construction in road construction with and without binders. // Proceedings of the 5th Int ...
    ... 54178×10−10 m), created in the X-ray tube at 30 mA and a voltage of 40 kV. Record the sample is performed in the range of 2θ from 5 to 50° with a step of 0,02° and a retention time of 0,5 s at each step. The data position of the diffraction peaks 2θ (°), the value of the flange distance d (m), and the ...