Претрага
2182 items
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Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite Powders
Željko Radovanović, Lidija Radovanović, Aleksandar Kremenović, Đorđe Janaćković, Rada Petrović (2022)Dicalcium phosphate (DP) materials, of which brushite and monetite were the most known, have been intensively studied for several decades because of excellent resorptive and osteoconductive properties that can satisfy the requirements needed for various medical applications, such as bone cements, coatings of metallic implants and bone grafts ...Željko Radovanović, Lidija Radovanović, Aleksandar Kremenović, Đorđe Janaćković, Rada Petrović. "Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite Powders " in Second International Conference on Electron Microscopy of Nanostructures ELMINA 2022, August 22nd–26th, 2022, Belgrade, Serbia, Serbian Academy of Sciences and Arts Knez Mihailova 35, 11000 Belgrade, Serbia (2022)
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Petrological and geochemical studies of lignite from the Tamnava West field, Kolubara basin (Serbia)
Milena Pajić, Reinhard F. Sachsenhofer, Achim Bechtel, Ksenija Stojanović, Vladimir Krstić, Dragana Životić (2021)... dehydroabictane and retene are major diterpenoid constituents of aromatic frachon. Only des- A-degradedtriterpenoids are present in thc saturated fraction in a low amount, while mono- and threearomatic triterpenoids are much more abundantin the aromatic fraction. Maceral composition and distribution ...
... Content of sesquiterpenoids, triterpenoids and steroids in saturated fracttons is low. Aromatic fraction ıs characterised by high content of triterpenoids with variable amount of diterpenoids. The 16a(H)-phyllocladane and pimarane are dominant biomarkers in the saturated fraction of all investigated samples ...
... h of angiosperms in КЕ > РГ ia KOD precursor OM. Significant aromatisation of triterpenoids during diagenesis with microbial activity is also present 1n Tamnava West lignite implying the changes of water column level resulted in slight variations of redox settings and pH during peat stage ...Milena Pajić, Reinhard F. Sachsenhofer, Achim Bechtel, Ksenija Stojanović, Vladimir Krstić, Dragana Životić. "Petrological and geochemical studies of lignite from the Tamnava West field, Kolubara basin (Serbia)" in 72nd Annual Meeting of the International Commitee for Coal and Organic Petrology (ICCP), The Prague, Chech Republic, 19th – 25 th September, ICCP (2021)
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An Efficient Class of Iterative Root-Finding Methods with Applications
Dejan Ćebić, Nebojša Ralević (2021)Dejan Ćebić, Nebojša Ralević. "An Efficient Class of Iterative Root-Finding Methods with Applications" in 2021 IEEE 19th International Symposium on Intelligent Systems and Informatics (SISY), IEEE (2021). https://doi.org/10.1109/SISY52375.2021.9582495
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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... ia optimization methods and decision-mak- ing approaches, to compare several different methods and present the results in parallel. The FAHP analysis used in the present study can be recommended for other fields of science and technology, where opti- mization is required and the best-possible decision ...
... Ministry of Education, Science and Technological Development of the Republic of Serbia for financing projects OI-176022, TR-33039 and III-43004. Two reviews, by ALEKSEY BENDEREV (Sofia, Bulgaria) and anonymous reviewer, are also acknowl- edged for their contribution and effort in providing con- structive ...
... transfer of both information and knowledge cou- pled with various uncertainty and imprecision (KOSKO 1993). This is the reason why fuzzy logic systems are distinguished, given that their essence is to handle knowledge that can be highly imprecise and expressed verbally. In fuzzy logic systems this “knowledge” ...Dragoljub Bajić, Dušan Polomčić. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia" in Geološki anali Balkanskoga poluostrva, Belgrade : University of Belgrade - Faculty of mining and geology (2014). https://doi.org/10.2298/GABP1475103B
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Why classical sequence stratigraphy doesn't work in Pannonian basin?
Dejan Radivojević (2018)... nfirmed in all half‐ graben and could be related to the moment of initial rifting in certain graben. Essentially it represents initial rifting systems tract formed in continental/alluvial environment (Prosser, 1993). From those reasons, in case that rifting process started in moment ...
... lope and turbidite flow formations which were defined in northwestern part of Pannonian basin (Juhasz et al., 2007, Sztano et al., 2016, Ivanišević & Radivojević, 2018). The third sequence (P3) is present only in deepest central part of region‐ nal transect, between 63 and 76 km, and 90 and 165 ...
... North Sea. Marine and Petroleum Geology, 12, 881–901. Posamentier, H.W., and G. P. Allen, 1999. Siliciclastic sequence stratigraphy: concepts and applications, SEPM Concepts in Sedimentology and Paleontology, v. 7, p. 210. Prosser, S., 1993. Rift related depositional system and their seismic ...Dejan Radivojević. "Why classical sequence stratigraphy doesn't work in Pannonian basin?" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Automatic construction of a morphological dictionary of multi-word units
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion... (masculine in this case), and it inflects for case, but it does not inflect for number (although the simple word rok does). The adjectives civilni and vojni agree with the noun rok in number, case, gender and animacy, but the comparative and indefinite forms of these adjectives are not used in this MWU ...
... their inflectional behavior is different: in the first MWU the second component can change in number whereas in the second MWU it does not inflect. For that reason they belong to two different classes (and super- classes), nc nxn4 and nc n4x respectively. In order to formulate our strategy for the production ...
... dictionaries, can help in deciding in favor of one inflectional class over other possibilities. For instance, this is the case for krem-karamel ‘caramel cream’ and kamen-temeljac ‘foundation stone’: both components in these MWUs are masculine inanimate nouns in the nominative singular, but in the first one karamel ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić. "Automatic construction of a morphological dictionary of multi-word units" in Lecture Notes in Computer Science 6233, Advances in Natural Language Processing, Proceedings of the 7thInternational Conference on NLP, IceTAL 2010, Reykjavik, Iceland, August 2010, Springer (2010): 226-237. https://doi.org/10.1007/978-3-642-14770-8_26
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FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina
... methods are developed in order to reduce herbicide mobility and protect natural water resources. The results presented in this paper show the interaction of herbicide S-metolachlor with inorganic and organically modified montmorillonite from Bogovina (Boljevac municipality, Serbia). Clay sample from ...
... vibrations is generally the main difference in the spectrum of HDTMA modified montmorillonite in comparison with the spectrum of inorganically modified montmorillonite. The wavenumber, intensity and width of these bands are sensitive to conformation in hydrocarbon chains. On the other hand, after ...
... the aromatic benzene ring of S-metolachlor and the aromatic benzene ring of the organic complex (π-π bonds). Also, the formation of a hydrogen bond occurs between the molecules of S-metolachlor and the molecules of water that are in the interlayer space and/or oxygen on the surface of the tetrahedral ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina" in 3rd International and 15th National Congress - Soils for Future under Global Challenges, Sokobanja, Serbia, Serbian Society of Soil Science (2021)
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New data on Mesozoic Radiolaria of Serbia and Bosnia, and implications for the age and evolution of oceanic volcanic rocks in the Central and Northern Balkans
Valentina Vishnevskaya, Nevenka Djerić, G.S. Zakariadze. "New data on Mesozoic Radiolaria of Serbia and Bosnia, and implications for the age and evolution of oceanic volcanic rocks in the Central and Northern Balkans" in Lithos, Elsevier BV (2009). https://doi.org/10.1016/j.lithos.2008.10.015
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Српски језик у дигиталном добу -- The Serbian Language in the Digital Age
Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)... language in Serbia is now Serbian, and no longer Serbo-Croatian. Due to recent migrations resulting form wartime circum- stances, the dialect picture in Croatia and Bosnia and Herzegovina (in the parts affected by war) has changed. ‚ Increasing changes in lexis and phraseology as well as in terminology ...
... players in Europe. In 2011,Nuance an- nounced the acquisition of Loquendo, which represents a further step in market consolidation. e speech synthesis and recognition methods in Ser- bia (and in the countries of the former Yugoslavia) were developed mainly in electrical engineering envi- ronments in cooperation ...
... on and information media – for example speaking can involve gestures and facial expressions. Digital texts link to pictures and sounds. Movies may contain language in spoken and written form. Inotherwords, speech and text technologies over- lap and interact with other multimodal communication and multimedia ...Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević. "Српски језик у дигиталном добу -- The Serbian Language in the Digital Age" in META-NET White Paper Series, G. Rehm, H. Uszkoreit (eds.), Springer (2012)
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A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia
When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...... criteria and RES alternatives. 3.2. The scope and inventory data The proposed FAHP method for the prioritization of RESs al- ternatives in Serbia is implemented in well-known technologies for electricity generation that are recognized in (IPC, 2014; IRE, 2019), and also in the Decree on Criteria and Procedure ...
... (biomass, hydro, solar, and wind) for electricity generation in Serbia. Different resources were used to define the criteria and al- ternatives in the model, including a literature review, expert judgments, and national and international data which deals with the quantitative and qualitative analysis of ...
... electricity in 2019 are shown in Table 1, while the structure of electricity generation from RESs in the 2014–2018 period is shown in Fig. 1. In Serbia, the National Renewable Energy Action Plan set a target of 27% of RES in its gross final energy consumption by 3 B. Pavlović, D. Ivezić and M. Živković ...Boban Pavlović, Dejan Ivezić, Marija Živković. "A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia" in Energy Reports, Elsevier BV (2021). https://doi.org/10.1016/j.egyr.2021.02.072
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Paleomagnetic evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum
Vesna Lesić, Emő Márton, Vesna Cvetkov, Dragana Tomić. "Paleomagnetic evidence for post-collisional Miocene clockwise rotation in the Serbian segment of the Vardar Zone and the Danubicum" in 26th IUGG General Assembly Prague, Czech Republic, International Union of Geodesy and Geophysics (2015)
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Strain partitioning around an indenter during oroclinal bending: kinematics of the Circum-Moesian fault system of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2021)... iscomprised of a foreland-convex orocline, situated in the north and east and a backarc-convexorocline situated in the south and west. The southern orocline of the Carpatho-Balkanides orogenformed during the Cretaceous closure of the Alpine Tethys Ocean and collision of the Dacia mega-unit with the Moesian ...
... ing processes, the Carpathianssubduction and Miocene slab retreat in the West and East Carpathians have driven the formationof the backarc-convex oroclinal bending in the south and west. The orocline formed duringclockwise rotation of the Dacia mega-unit and coeval docking against the Moesian indenter ...
... deformation observed in the Getic Depression in front of the South Carpathians, while in the south-west the Sokobanja-Zvonce and Rtanj-Pirot faults splayoff the Timok Fault. These two faults are connected by coeval E-W oriented normal faults thatcontrol several intra-montane basins and accommodate oro ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning around an indenter during oroclinal bending: kinematics of the Circum-Moesian fault system of the Carpatho-Balkanides" in EGU General Assembly 2021, Vienna, Austria, 19.-30.4.2021., EGU (2021)
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Flotability of chalcopyrite from the Rudnik deposit
Директно селективно флотирање олова, бакра и цинка у флотацији рудника „Рудник” датира од 1984. године. Технолошка шема омогућава директно издвајање селективних концентрата у три циклуса. У првом циклусу се издваја минерал олова (галенит), док су минерал бакра (халкопирит) и минерал цинка (марматит) депримирани. У другом циклусу се оток концентрације минерала олова кондиционира и припрема за издвајање минерала бакра. Након кондиционирања, у овом циклусу се издваја минерал бакра. У трећем циклусу се оток концентрације минерала бакра кондиционира и припрема за ...Đurica Nikšić, Predrag Lazić, Milena Kostović. "Flotability of chalcopyrite from the Rudnik deposit" in Journal of Mining Science, Springer Verlag (2021). https://doi.org/10.1134/S1062739121030170
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Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia
Biljana Abolmasov, Uroš Đurić (2021)... Faculty of Mining and Geology, Serbia, biljana.abolmasov@rgf.bg.ac.rs 2University of Belgrade, Faculty of Civil Engineering, Serbia, udjuric@grf.bg.ac.rs Background The Umka landslide is the deepest and biggest active landslide in the Republic of Serbia and has been investigated and monitored by ...
... the Umka landslide with reference to landslides in weathered Neogene marls in Serbia. Landslides 12 (4): 689-702. Ćorić S., Božinović D., Vujanić V., Jotić M. and Jelisavac B., 1996, Geotechnical characteristics of old landslides in Belgrade area. In: Senneset K (ed) Proceedings of the 7th International ...
... focused on results and experience gained from automated Global Navigation Satellite System (GNSS) monitoring network data, PSInSAR data analysis from Sentinel1 radar satellite images, conventional geodetic monitoring network data and UAV imaging, processing and data analysis in the last six years ...Biljana Abolmasov, Uroš Đurić . "Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia" in 3rd European Regional Conference of IAEG/ Athens/ Greece/ 6-10 October 2021, IAEG National Group Greece (2021)
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Negative Impact of Backwater Levels of Danube River and its Tributaries to the Groundwater Regime in Meliorated Riverside Areas
This paper describes updated calculation methodology of Danube backwater impact, occurred as a consequence of “Đerdap I” hydropower plant operation, onto the meliorated riverside areas. This methodology is based on hydrodynamic analysis of groundwater regime (size, duration, level and inflow changes) and quantification of melioration areas impairment which is caused by “Đerdap I” hydropower plant operation. By comparing the groundwater regime elements, obtained by variant hydrodynamic calculation in mathematical models for natural – not backed up and actual – ...HPP ''Djerdap 1'', backwater influence, groundwater regime, hydrodynamic analysis, melioration area, drainage system, additional energy engagementPredrag Pajić, Uroš Urošević, Dušan Polomčić, Milan Dimkić. "Negative Impact of Backwater Levels of Danube River and its Tributaries to the Groundwater Regime in Meliorated Riverside Areas" in IWA Specialist Groundwater Conference, Conference Proceedings and Book of Abstracts, 09-11 June 2016, Belgrade, Serbia, Institut Jaroslav Černi (2016)
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Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia
Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology... (Grivska Formation) and the outer shelf region (Hallstatt facies) are found only in sedimentary mć- langes and are incorporated in the deep-water troughs in front of an advancing nappe stack. The thrust sheets ofthe former passive margin were suc- cessively fragmented and incorporated into the ...
... the toe-of-slope and in the basin near to the slope by DIMI- TRIJEVIĆ & DIMITRIJEVIĆ (1991) and KovAcs et al.(2010, 2011), based on the distinguished lithofacies. The term “Grivska Formation” in the Inner Di- narides has been used until nowadays in a confusing and misleading way for ...
... in parts with coarser-grained al- lodapic layers and common chert nodules and layers, are known in the Internal Dinarides under the name of “Grivska Formation”. This formation was infor- mally established by DIMITRIJEVIĆ & DIMITRIJEVIĆ (1991) and supposed to be synchronous with the lower part ...Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić. "Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia" in Geološki anali Balkanskoga poluostrva (2019). https://doi.org/10.2298/GABP1901017B
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The external aggregation Newton's method for solving nonlinear equations and applications
Marija Paunović, Dejan Ćebić, Nebojša Ralević. "The external aggregation Newton's method for solving nonlinear equations and applications" in The University Thought - Publication in Natural Sciences, Centre for Evaluation in Education and Science (CEON/CEES) (2020). https://doi.org/10.5937/univtho10-24982
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Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines
This paper presents the model for the identification of reference points on the lifetime curve of engineering systems. This curve commonly represents the increase and decline of failure in relation to time. A direct correlation between failure rate and costs is assumed in this paper, therefore, statistical and empirical analysis of costs provided reference points. This approach is used for positioning stages of the engineering system’s lifetime with a minimal number of failures and costs, regardless of whether these ...Electrical and Electronic Engineering,Industrial and Manufacturing Engineering, Control and Optimization, Mechanical Engineering, Computer Science (miscellaneous), Control and Systems EngineeringUgljesa Bugarić, Milos Tanasijević, Stevan Djenadić, Dragan Ignjatović, Ivan Janković. "Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines" in Machines, MDPI AG (2022). https://doi.org/10.3390/machines10110995
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Structural and microstructural study of brookite based TiO2 nanocomposites with carbon black (C)
Structural and microstructural properties of TiO2-based nanocomposites with carbon black (C), synthesized by sol-gel-hydrothermal method, have been studied by XRPD and Raman scattering. Detailed size-strain analyses of XRPD and Raman scattering results are presented in order to investigate the influence of C content on brokite and anatase phase formation. The XRPD size-strain analyses have resulted in reliable structure and microstructure results for both anatase and brookite and their relative abundance ratio has been refined by Rietveld method. The brookite ...Aleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Maja Šćepanović. "Structural and microstructural study of brookite based TiO2 nanocomposites with carbon black (C)" in The European Powder Diffraction Conference (EPDIC) Book of Abstracts, Šibenik, 31 May - 3 June 2022, EPDIC (2022)
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Dating of alluvial sediments from borehole at the lower course of the Sava river and indications of the connection between their genesis and climate changes in the Pleistocene
David Mitrinović, Jelena Zarić, Oliver Anđelković, Gyorgy Sipos, Dušan Polomčić, Milan Dimkić (2019)This paper analyses the way in which Pleistocene climate change and glaciations in Dinaric Mountains was reflected in the deposition of alluvial sediments in the Sava river Valley, using a case study of Belgrade Groundwater Source (BGS), the largest and most downstream alluvial water supply source along the Sava river. A stratigraphic analysis of the Quaternary sediments from two boreholes on this site, based on sediment dating, lithological members identification, grain size distribution analysis was performed. Comparison with the ...Pleistocene, Alluvial deposits, Climato-lithostratigraphy, Sava river, Belgrade groundwater source, LuminescenceDavid Mitrinović, Jelena Zarić, Oliver Anđelković, Gyorgy Sipos, Dušan Polomčić, Milan Dimkić. "Dating of alluvial sediments from borehole at the lower course of the Sava river and indications of the connection between their genesis and climate changes in the Pleistocene" in Quaternary International, Elsevier BV (2019). https://doi.org/10.1016/j.quaint.2019.09.028