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1119 items

  • 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
    ... different genetic types of coeval structures that * Corresponding author at: Utrecht University, Faculty of Geosciences, Utrecht, The Netherlands. E-mail address: n.krstekanic@uu.nl (N. Krstekanić). Contents lists available at ScienceDirect Global and Planetary Change journal homepage: www.elsevier ...
    ... gouges, intense faulting with large offset at outcrop scale, or tight folding. Similar zones of intense deformation with large outcrop-scale offsets have been observed also elsewhere, allowing the definition of new major tectonic contacts that are relevant at map scale. Furthermore, in order to understand ...
    ... shear bands) as well as on the compati- bility of deformation and offsets observed in the field with the one at map scale. The lateral correlation has demonstrated that the thrusting observed at the Supragetic and Upper Getic nappe contacts has an overall curved geometry in map view and is associated ...

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+

    Tamara Đorđević, Ljiljana Karanović, Marko Jagodič, Zvonko Jagličić (2021)
    In this study, a new cobalt arsenate belonging to the alluaudite supergroup compounds with the general formula of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H, )0.5(H2O,H3O)0.5]2x+ (denoted as CoAsAllu) was synthesized under hydrothermal conditions. Its crystal structure was determined by a room-temperature single-crystal X-ray diffraction analysis: space group C2/c, a = 11.6978(8), b = 12.5713(7), c = 6.7705(5) Å, b = 113.255(5)◦, V = 914.76(11) Å3, Z = 2 for As6H8Co6O25. It represents a new member of alluaudite-like protonated arsenates and the first alluaudite-like phase ...
    супергрупа алуаудита, арсенати прелазних метала, хидротермална синтеза, кристална структура, хидратисани хидрокси-арсенати, стехиометрија, магнетна својства

  • Komparativna analiza završnih kontura površinskog kopa Drmno

    Dejan Stevanović, Dragan Ignjatović, Tomislav Šubaranović, Mirjana Banković, Petar Marković (2022)
    Definisanje optimalne završne konture površinskog kopa od suštinskog je značaja za ostvarivanje strateških ciljeva u razvoju rudarskih projekata. Savremeni programski paketi i metode za optimizaciju granica kopa, zasnivaju se na pronalasku završne konture koja obezbeđuje maksimalan profit. U slučaju površinskih kopova uglja, kod kojih osim profita postoji i čitav niz dodatnih kriterijuma i strateških ciljeva, princip optimizacije granica prema profitu, najčešće nije u potpunosti primenjiv. Iz rog razloga za uspešno definisanje granica površinskih kopova, neophodno je sagledati čitavu lepezu ...
    završna kontura, ugalj, komparativna analiza, optimizacija, strateški ciljevi

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R

  • 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
    ... or S8), or coarse DK-I-60-3 suspension in water and immersed in 200 mL of dissolution medium (water:isopropanol 9:1, v/v). The test was performed at 37 ◦C. At predetermined time points (5 min, 20 min, 1 h, 2 h, 4 h, and 8 h), 1 mL of medium with dissolved particles was withdrawn and replaced with 1 mL ...
    ... F5, F6, and F8, corresponding suspensions (S5, S6, and S8) was determined at 37 ◦C. A total of 300 µL of the sample was added to 1.5 mL ultra-purified water, 0.1 M hydrochloride acid, or phosphate buffer (pH 6.8) and shook at 250 rpm for 24 h. Samples were centrifuged (14,000× g, MiniSpin® plus centrifuge ...
    ... 150–200 g were housed six animals per cage. In the animal room, the light/dark period was set on 12 h cycles (light on at 6:00 a.m) with the illumination 120 lx. The temperature was set at 22 ± 1 ◦C, with the relative humidity 40%–70%. The research was conducted in accordance with the National Institutes ...

  • 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
    ... converts mechanical work into potential energy to increase the pressure of the fluid. The pressure at which the fluid enters the pump from the reservoir is called the suction pressure, while the pressure at which the fluid exits the pump is referred to as the discharge pressure. The difference between ...
    ... cylinder and the piston, directly reducing the pump's operational efficiency. [5] Bottom Seating If the seating is done at the bottom end, the pump can be installed at greater depths (for deep well exploitation) since the pump cylinder does not stretch or expand due to the weight of the fluid ...
    ... fluid by moving the smooth rod at the desired speed. The rod strings descend back during the downward stroke due to the force of gravity. The movement of the rod strings causes cyclic movement of the pump. To lift the rod strings and fluid to the desired height at a given speed, the horsehead must ...

  • WS4LR - a Worksation for Lexical Resources

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović (2006)
    Lexical Resources, Wordnet, Serbian
    ... WS4LR, the workstation for lexical resources, a software tool developed within the Human Language Technology Group at the Faculty of Mathematics, University of Belgrade. The tool is aimed at manipulating heterogeneous lexical resources, and the need for such a tool came from the large volume of resources ...
    ... on the .NET platform and runs on a personal computer under Windows 2000/XP/2003 operating system with at least 256MB of internal memory. 1 Introduction The Human Language Technology group at the Faculty of Mathematics has been developing various lexical resources over quite a long period, ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs WS4LR: A Workstation for Lexical Resources Cvetana Krstev 1 , Ranka Stanković2 , Duško Vitas 3 and Ivan Obradović2 1Faculty ...

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)
    ... usually used for alignment at the sentence level, which is the most common one, is the method developed by (Gale and Church, 1993). Figure 2 depicts an example of an aligned text represented in the WS4LR tool. It is a legal texts in English and Serbian, aligned at the sentence level. Figure 2 ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs INFOTHECA – Journal of Informatics and Librarianship № 1-2, vol IX, May 2008 operates under the auspices of the Faculty of ...
    ... projects, and hence within dif- ferent methodological frameworks, motivated members of the Group to initiate the development of software tools aimed at alleviating the main- tenance and further development of resources, as well as their integration, which makes the solu- tion of various tasks related ...

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • 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

  • A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić (2012)
    This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...
    multilingual digital libraries, query expansion, TMX
    ... expansion. At present, we do not use other semantic relations available in both Wordnets. Finally, Bibliša also uses the “Dictionary of librarianship: English-Serbian and Serbian-English” that is available online at http://btr.nb.rs. The production of this dictionary started in 2001 at the National ...
    ... the main features of Bibliša (http://hlt.rgf.bg.ac.rs/Biblisha), a tool developed within the Human Language Technology group at the University of Belgrade, aimed at enhancement of search possibilities in multilingual digital libraries of e-journals. The tool offers cross-lingual search functions ...
    ... operates within a complex system composed of several modules as depicted in Figure 3. Targeted at textual resources in the form of collections of TMX documents and the corresponding metadata, the system has at its disposal several other lexical resources, such as morphological e-dictionaries. Together ...

  • Why classical sequence stratigraphy doesn't work in Pannonian basin?

    Dejan Radivojević (2018)
    basen iza ostrvskog luka, detačment, miocen, Panonski basen, riftogeneza, sekvenciona stratigrafija
    ... part of half‐graben. Generally, sequences had wedge shape geometry, with thinner part at the hanging  wall and greater  thickness at  the  fault  itself. Usually  seismic  record within  sequence  is poor, while at  some places close to the fault it has hummocky geometry. This systems tract is not c ...
    ...  u riftnim basenima je promenljivo. Iz tih razloga tradi‐ cionalni (klasični) pristup sekvencione stratigrafije je neprimenljiv. Razumevanje ovog sistema je važno u  smislu formiranja tektonski i klimatski kontrolisanih riftnih ciklusa.  Interpretacijom tektonskih sistemskih pojaseva i korelacijom  ...
    ... ofila. Neka    175 područja  pretrpela  su  ekstenziju  slabijeg  intenziteta,  dok  su  druga  pretrpela  višefaznu  riftogenezu.  Najstariji sistem faze maksimalne riftogeneze je donjomiocenske starosti, dok je najmlađi donjopontski  (Matenco and Radivojević, 2012).   Iznad preriftne  sekvence  ...

  • Introductory editorial - Special issue: Genesis and protection of groundwater in carbonate aquifer

    Saša Milanović (2019)
    Geochemistry and Petrology

  • Environmental Energy Security Indicators as Tools for Environmental Protection

    Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević (2019)
    Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...
    енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост
    ... stoichiometric calculation or standard emission estimates depending on the type of energy source. At the same time, through the mentioned partial indicators, one can see the reduction or increase of emissions at the national as well as the sector level, the proportions of the use of renewable sources, ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 1 7th International Symposium MINING AND ENVIRONMENTAL PROTECTION September 25 – 28. 2019, Vrdnik, Serbia ...
    ... security. Energy security is a synthesis of the geopolitical and energy aspects of energy availability in various forms in satisfactory quantities and at affordable prices. Energy security as indicator is described with a group of synthesis indicators. It is necessary to continually observe energy ...

  • Multiword Expressions between the Corpus and the Lexicon: Universality, Idiosyncrasy and the Lexicon-Corpus Interface

    Verginica Barbu Mititelu, Voula Giouli, Kilian Evang, Daniel Zeman, Petya Osenova, Carole Tiberius, Simon Krek, Stella Markantonatou, Ivelina Stoyanova, Ranka Stankovic, Christian Chiarcos (2024)
    Predstavljamo trenutne aktivnosti na definisanju interfejsa leksikona i korpusa koji će služiti kao referenca u prikazu polileksemskih jedinica - višečlanih izraza - (različitih tipova - imenskih, glagolskih, itd.) u specijalizovanim leksikonima i povezivanju ovih unosa sa njihovim pojavljivanjima u korpusima. Konačni cilj je korišćenje ovakvih resursa za automatsko identifikovanje višečlanih izraza u tekstu. Uključivanje nekoliko prirodnih jezika ima za cilj univerzalnost rešenja koje nije usredsređeno na određeni jezik, kao i prilagođavanje idiosinkrazijama. Raspravljaju se izazovi u leksikografskom opisu višerečnih ...
    multiword expression lexicon, corpus, proof-of-concept lexicon encoding

  • Transboundary groundwater resources of Serbia - present status and future needs for sustainable management

    Veljko Marinović, Branislav Petrović, Zoran Stevanović (2021)
    Republic of Serbia is located at the crossroads of Southeast and Central Europe and belongs to the Central Balkans. With its 88,360 km2, Serbia is one of the larger countries of the Balkan Peninsula. It borders 8 countries and has at least one transboundary aquifer (TBA) with each of them. According to evaluation conducted for UNECE in 2008, Serbia has a total of 17 TBAs, out of which 15 are shared with one neighboring country, while two aquifers are shared with two or three ...
    međugranične izdani, Srbija, monitoring podzemnih voda, upravljanje podzemnim vodama

  • Validation of vulnerability assessment by means of the Time Dependent, Model: case study from the Slovenian karst catchment

    Vladimir Živanović, Nataša Ravbar, Igor Jemcov (2019)
    Groundwater vulnerability assessment methods are continuously being developed and existing methods are very often modified to provide better simulation of natural protection conditions and more objective results. Most frequently used methods are based on calculation of predefined parameters influencing water infiltration and underground flow, which can often lead to bias conclusions related to vulnerability evaluations. Some other methods, like the Time Dependent Model (TDM) are based on an approach, where parametrization is obtained at the final stage of the ...
    Ocena ranjivosti podzemnih voda, karstne podzemne vode, TDM metoda, delineacija sanitarnih zona, Slovenački karst

  • Evidence for Badenian marine transgression in Belgrade (Serbia)

    Filip Anđelković, Dejan Radivojević (2019)
    ... palaeogeographic significance. The onset of transgression is well-marked by the occurrence of typical basal conglomerates at several locations in the city area, especially at Kalemegdan fortress and Rakovica stream. These conglomerates contain rich marine mollusc fauna, belonging to the Ostrea order ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Evidence for Badenian marine transgression in Belgrade (Serbia) Filip Anđelković1 and Dejan Radivojević1 1University of Belgrade ...