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2160 items
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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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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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The final closure of the Vardar Ocean: paleomagnetic, AMS and structural results
... folded during the Upper Cretaceous and Paleogene and the paleomagneticsignals, which exhibit smeared distribution close to the present N, are of post-folding age. TheAMS foliation and bedding planes are sub-parallel, thus the deformation must have been weak.Fold axes and AMS lineations are roughly N-S oriented ...
... recently published and new paleomagnetic, AMS results in combination withstructural observations will be presented from Upper Cretaceous sediments and Oligocene–Lower Miocene igneous rocks representing the areas bordering the Sava zone from the westernand eastern sides, respectively and from the upper ...
... of the flanking areas and the general NE-SW orientation of thecompressional stress field outside of the zone. Acknowledgement. This work was financially supported by the National Development andInnovation Office of Hungary, project K 128625 and by the Ministry of Education and Science of theRepublic ...Emö Márton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov. "The final closure of the Vardar Ocean: paleomagnetic, AMS and structural results" in EGU General Assembly 2020, Copernicus GmbH (2020). https://doi.org/10.5194/egusphere-egu2020-17266
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Evidence for Badenian marine transgression in Belgrade (Serbia)
Filip Anđelković, Dejan Radivojević (2019)... Tašmajdan limestones, Višnjica clays and Konjarnik schlier (Anđelković M., 1987; Anđelković, M.&Anđelković, J., 1997; Anđelković F. & Radivojević, 2018). Of these, clastics (conglomerates, sands and sandstones) and limestones (mostly subreefal) have the greatest extent and palaeogeographic significance ...
... Mediterranean is the cause for the partial isolation and fall of salinity (Rögl, 1999). REFERENCES Anđelković, M. 1987. Geology of the wider Belgrade area – Geology and geodynamics. Institute for regional geology and palaeontology, Faculty of Mining and Geology, p. 428 (in Serbian) Anđelković, M., Anđelković ...
... Belgrade 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 ...Filip Anđelković, Dejan Radivojević. "Evidence for Badenian marine transgression in Belgrade (Serbia)" in AAPG Vienna, Paratethys petroleum systems between Central Europe and the Caspian Region, Vienna, 26-27 mart, 2019, AAPG (2019)
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Split-Desktop software for the analysis of fragment size distribution of blasted rock mass
Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović. "Split-Desktop software for the analysis of fragment size distribution of blasted rock mass" in 9th International Conference Mining and environmental protection, Sokobanja, Serbia, 24 – 27. May 2023, Belgrade : University of Belgrade, Faculty of Mining and Geology (2023)
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Adsorption and Polymerization of Aniline on Cu(II)-Montmorillonite: Vibrational Spectroscopy and ab Initio Calculation
Batch adsorption experiments in the presence of oxygen were performed to study the interlayer reactions of aniline on Cu(II)-montmorillonite in aqueous solutions. At concentrations below a critical value of CC ) 2.6 mmol dm-3 only a colored Cu(II)-aniline complex is formed, characterized by a stability constant of log(Kassoc/dm3 mol-1) ) 1.5. At concentrations beyond Cc aniline polymerizes yielding a dark brown product, which is identified by two vibrational spectroscopy techniques, attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and ...M. Ilić, E. Koglin, A. Pohlmeier, H. D. Narres, M. J. Schwuger. "Adsorption and Polymerization of Aniline on Cu(II)-Montmorillonite: Vibrational Spectroscopy and ab Initio Calculation" in Langmuir (2000). https://doi.org/ 10.1021/la000534d
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Mafic alkaline metasomatism in the lithosphere underneath East Serbia: Evidence from the study of xenoliths and the host alkali basalts
Effects of mafic alkaline metasomatism have been investigated by a combined study of the East Serbian mantle xenoliths and their host alkaline rocks. Fertile xenoliths and tiny mineral assemblages found in depleted xenoliths have been investigated. Fertile lithologies are represented by clinopyroxene (cpx)-rich lherzolite and spinel (sp)-rich olivine websterite containing Ti–Al-rich Cr-augite, Fe-rich olivine, Fe–Al-rich orthopyroxene and Al-rich spinel. Depleted xenoliths, which are the predominant lithology in the suite of East Serbian xenoliths, are harzburgite, cpx-poor lherzolite and rare ...Cvetković Vladica, Downes Hilary, Höck Volker, Prelević Dejan, Lazarov Marina. "Mafic alkaline metasomatism in the lithosphere underneath East Serbia: Evidence from the study of xenoliths and the host alkali basalts" in Geological Society Special Publication 337, London, United Kingdom :Geological Society (2010): 213-239. https://doi.org/10.1144/SP337.11
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AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters
Although an invisible component of the hydrologic cycle, groundwater generally takes precedence over other water resources in the area of drinking water supply. Among groundwater resources, karst aquifers tend to be rich in sufficiently-accessible amounts of high-quality water. During most of the year, this water requires only disinfection prior to delivery to the end user. However, in many cases extreme rainfall and/or sudden snow melt results in transient turbidity, increase in bacterial count and temporary contamination (e.g. increase in ...autocorrelation, cross-correlation, autoregressive model, cross-regressive model, autocross regressive model, nitrates, Banja Spring, Serbia.Vesna Ristić-Vakanjac, Marina Ćokorilo-Ilić, Petar Papić, Dušan Polomčić, Radisav Golubović. "AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters" in Geološki anali Balkanskoga poluostrva, National Library of Serbia (2018). https://doi.org/10.2298/GABP1879071R
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Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia
Around 2/3 of electricity production in Serbia originates from coal-fired thermal power plants. The most significant domestic coal deposits are lignite deposits, a type of low -quality coal that causes negative health, climate and environmental impacts during the combustion. To reduce those negative impacts on domestic electricity production and to promote environmental awareness, the Serbian Energy Sector Development Strategy and the National Action Plan for Use of Renewable Energy Sources indicate the plan for increasing the share of ...Strategija obnovljive energije, Održiva energija, Proizvodnja električne energije, Solarna energija, Biomasa, Hidroenergije, Energija vetra... -perspective approach th at consists of econom ic, environmental, technical, and socio-political criteria. Further on, the Fu zzy A nalytical Hierarchy Pr ocess (FA HP) m ethod is u sed for a ssessing four renewables (biom ass, hydro, solar and wind) in regard to the defined criteria. The obtained ...
... ca uses negative h ealth, climate a nd environmental im pacts during the com bustion. To reduce th ose n egative im pacts on dom estic electricity pr oduction a n d to pr om ote env ironmental a w areness, the Serbian En ergy Sector Development Strategy and the National Action Plan for Use of ...
... experts' judgments and availa ble literature. The results of th e FAHP reveal that biom ass has the highest rank among the RES to generate electricity and a s su ch can be characterized as a strategic RES. Wind and hydro energy are ranked second and th ird, respectively, and solar is in the last ...Boban Pavlović, Dejan Ivezić, Marija Živković. "Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia" in Conference on Sustainable Development of Energy, Water and Environment Systems, Sarajevo, 28.6.-2.7.2020., Faculty of Mechanical Engineering and Naval Architecture, Zagreb (2020)
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Clockwise rotation in the Serbian segment of the Vardar zone and in the Danubicum of Eastern Serbia - tetonic implication
Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Tomić. "Clockwise rotation in the Serbian segment of the Vardar zone and in the Danubicum of Eastern Serbia - tetonic implication" in 5. Hrvatski geološki kongres. Abstract Book 5th Croatian Geological Congress, Hrvatski geološki institut (2015)
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Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas
During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović. "Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas" in 31st International Conference Ecological Truth & Environmental Research-EcoTER'24, Sokobanja, 18-21. jun 2024, Bor : Tehnički fakultet u Boru (2024)
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Serbian Society of Geomorphologists
Dragana Đurić, Jelena Ćalić (2019)Dragana Đurić, Jelena Ćalić. "Serbian Society of Geomorphologists" in GeomorForum 2019: Landforms related to plains of Serbia and its neighboring area, Conference Programme and Abstracts, Beograd, 10-12. maj 2019, Serbian Society of Geomorphologists (2019)
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Punctuated, episodic magmatism and mineralization of the Rogozna skarn-hosted Au-Zn-Pb-Cu deposits revealed through high-precision U-Pb zircon geochronology
The subvolcanic regions of magmatic centers are commonly associated with alteration, mineralization, and economic ore deposits, however the duration and frequency of mineralizing pulses within the overall lifespan of these centers can be poorly defined. Therefore, models for the formation of mineral systems require more highprecision geochronology data to refine their evolutionary models. Rogozna Mountain and its eponymous magmatic complex, located in SW Serbia, hosts multiple base metal deposits associated with variable rock types and structural expressions and serves as a natural laboratory to ...Skarnovska mineralizacija, Magmatsko-hidrothermalni sistemi, Subvulcanske intruzije, geohronologija na cirkonima, CA-ID-TIMSSean P. Gaynor, Milorad D. Antić, Vladica Cvetković, Kristina Šarić, Urs Schaltegger. "Punctuated, episodic magmatism and mineralization of the Rogozna skarn-hosted Au-Zn-Pb-Cu deposits revealed through high-precision U-Pb zircon geochronology" in Ore Geology Reviews, Elsevier (2023). https://doi.org/https://doi.org/10.1016/j.oregeorev.2023.105775
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Waste rocks and medieval slag as sources of environmental pollution in the area of the Pb-Zn Mine Rudnik (Serbia)
Alena Zdravković, Vladica Cvetković, Kristina Šarić, Aleksandar Pačevski, Aleksandra Rosić, Suzana Erić (2020)The new geochemical and mineralogical data of soil and water from the Pb-Zn Rudnik Mine area (central Serbia) reveal that the areas close to the mining sites and those located remotely from them are both affected by significant pollution by toxic elements, especially As, Pb, Ni and Cr. We, therefore, propose that two main sources are generally responsible for the current state of pollution in this area. The first is the material from waste rock dumps (WRDs) in which ...Alena Zdravković, Vladica Cvetković, Kristina Šarić, Aleksandar Pačevski, Aleksandra Rosić, Suzana Erić. "Waste rocks and medieval slag as sources of environmental pollution in the area of the Pb-Zn Mine Rudnik (Serbia)" in Journal of Geochemical Exploration, Elsevier BV (2020). https://doi.org/10.1016/j.gexplo.2020.106629
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Dynamic and Static Elastic Properties - Laboratory Investigations of Metamorphites of the "Vranjska Banja" Series
Metamorphites of the series “Vranjska banja” built predominantly of high crystallinity schist series, alternately layered double mica, gneiss, leptonite and micaschist. For the construction of the “Prvonek” dam were carried out laboratory investigations of dynamic and static elastic properties on micashist and gneiss samples in the perpendicular and parallel direction to the foliation. These investigations provided monitoring of the rock mass anisotropy properties and greater reliability of the design parameteres. As the design of mining and construction facilities becomes ...Jelena Majstorović, Bojan Dimitrijević, Suzana Lutovac, Snežana Savković, Miloš Gligorić. "Dynamic and Static Elastic Properties - Laboratory Investigations of Metamorphites of the "Vranjska Banja" Series" in XVI International Conference of the Open and Underwater Mining of Minerals, Scientific and technical union of mining, geology and metallurgy (2021)
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Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders
Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić (2023)... Serbia “Department of Mineralogy, Crystallography, Petrology and Geochemistry, Faculty of Mining and Geology, University of Belgrade, Đušina 7, 11000 Belgrade, Serbia We studied the influence of Ag doping on the crystal structure and magnetic properties of CuO nanopowders. For the synthesis of ...
... morphological and magnetic properties in CuO nanopowders Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Influence of Ag doping on the morphological and magnetic ...
... Serbia For Publisher Dr Dragica Stanković Printing layout Dr. Jelena Maletaškić, Vladimir V. Srdić Press Faculty of Technology and Metalurgy, Research and Development Centre of Printing Technology, Karnegieva 4, Belgrade, Serbia Published: 2023 Circulation: 120 copies CIP – Karanorusanuuja ...Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić. "Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders" in Programme ; and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia , Beograd : Institut za multidisciplinarna istraživanja, (2023)
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Palaeoflora of Kamenica (Pranjani Basin, western Serbia)
Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...... Kamenica is a mix of Late Oligocene and early Miocene floras from Serbia. Paleoclimate estimates derived from the woody dicotyledonous angiosperm from the Kamenica lo- cality indicate the climate was warm and humid, subtropical-tropical. Such favorable environmental and climatic con- ditions were reflected ...
... basin (the village of Kamenica) and it consists of well cemented conglomerates and breccias lying directly over the peridotite-serpentine rock. above them is a sequence of alternating sandstones, con- glomerates and marlstones. Well preserved remains of fossil plants and fish have been found in these sediments ...
... elements of temperate climate are very rare, and represented only by a few imprints of Betulaceae and ulmaceae. Based on the taxonomical composition of palaeo- phytoassociation and leaf morphology, it has been inferred that the climate was subtropical and humid during the existence of this plant association ...Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević . "Palaeoflora of Kamenica (Pranjani Basin, western Serbia)" in Geološki anali Balkanskog poluostrva, Beograd : Rudarsko-geološki fakultet (2019). https://doi.org/10.2298/GABP1902053L
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Granitoids associated with East Vardar ophiolites (Serbia, F.Y.R. of Macedonia and northern Greece): origin, evolution and geodynamic significance inferred from major and trace element data and Sr-Nd-Pb isotopes.
Šarić Kristina, Cvetković Vladica, Romer, R.L., Christofides, G., Koroneos, A.. "Granitoids associated with East Vardar ophiolites (Serbia, F.Y.R. of Macedonia and northern Greece): origin, evolution and geodynamic significance inferred from major and trace element data and Sr-Nd-Pb isotopes." in Lithos Lithos no. 108, :Elsevier Elsevier Elsevier (2009): 131-150
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Micro- to nanoscale textures of gold in arsenopyrite and scorodite from the As-Au-Bi assemblage of Drenjak locality (Serbia)
Ivana Jelić, Janez Zavašnik, Marina Lazarov, Alena Zdravković, Sabina Kovač, Jovica Stojanović, Aleksandar Pačevski (2023)Arsenopyrite and pyrite are important carriers of Au that is present in the form of microscopic and “invisible” gold. Such gold can be expected to be released upon the process of oxidation of these sulfides. In studied gold mineralization at Drenjak, related to the granitoids of the Oligocene-Miocene Kopaonik Ore District, the main arsenopyrite-pyrite-(bismuthinite) sulfide assemblage was formed in the quartz bodies and partly replaced by scorodite (FeAsO4·2H2O) and Bi-arsenate. With only up to 5 ppm of gold recorded ...Ivana Jelić, Janez Zavašnik, Marina Lazarov, Alena Zdravković, Sabina Kovač, Jovica Stojanović, Aleksandar Pačevski. "Micro- to nanoscale textures of gold in arsenopyrite and scorodite from the As-Au-Bi assemblage of Drenjak locality (Serbia)" in Ore Geology Reviews, Elsevier BV (2023). https://doi.org/10.1016/j.oregeorev.2023.105711