Претрага
689 items
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A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach
Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependabilityNikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović. "A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach" in Applied Sciences, Basel, August 2024, MDPI (2024). https://doi.org/https://doi.org/10.3390/app14177947
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Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations
The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija... early middle Miocene Cerna and Timok faults of the South and Serbian Carpathians, located to the east and south-east of the study area (Fig. 1b). To the south of the study area, such low-offset strike-slip deformation was documented away from the Cerna and Timok faults, in the internal Serbian ...
... studied at the surface in their northern segments. However, the geometry and kinematics of this contact are still not fully understood. The aim of this study is to investigate structural features of metamorphic units exposed in the Vršac Mts. and constrain their tectonic evolution during the Alpine orogeny ...
... STOJADINOVIC, KRSTEKANIĆ, KOSTIĆ, RUŽIĆ and LUKOVIĆ GEOLOGICA CARPATHICA, 2021, 72, 5, 395–405 with different orientations (Fig. 6a). South of the study area, similar structural relations were observed in the Jastrebac Mts., and also further to the south, in the Central Serbo- Macedonian Subunit of ...Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković . "Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations" in Geologica Carpathica, Central Library of the Slovak Academy of Sciences (2021). https://doi.org/https://doi.org/10.31577/GeolCarp.72.5.3
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Long-term rockslope monitoring and rockfall prediction
Miloš Marjanović, Biljana Abolmasov, Marko Pejić, Jelka Krušić. "Long-term rockslope monitoring and rockfall prediction" in Proceedings of 3rd European Regional Conference of IAEG/ Athens/ Greece/ 6-10 October 2021, International Association for Engineering Geology and the Environment (2021)
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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)... that controls numerous intra-montane basins and thrusting of the western Balkansunits over the Moesian Platform. We have performed a field structural study in order tounderstand the mechanisms of deformation transfer and strain partitioning around the Moesianindenter during oroclinal bending by focusing ...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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Balance between tectonics and sedimentation during geodynamic evolution of the Adria-Europe convergence zone in central Serbia
... continental units of Adria and Europe (i.e., theSava subduction system). In this region, we have performed a coupled kinematic andsedimentological study in order to understand the main controlling mechanism of deposition inbasins situated above the Sava subduction zone. The Cretaceous sedimentation on ...Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Tamara Bogdanović. "Balance between tectonics and sedimentation during geodynamic evolution of the Adria-Europe convergence zone in central Serbia" in EGU General Assembly 2021, Vienna, Austria, 19.-30.4.2021., EGU (2021)
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Alpine tectonic evolution of the Northern Serbo-Macedonian subunit: inferences from kinematic and petrological investigations
... to segregate and quantify the effects of the Oligocene–Miocene extension we haveconducted a coupled kinematic, petrological and thermochronological study in the segments ofNorthern Serbo-Macedonian sub-unit adjacent to the Dinarides and Carpathians. The recenttectonic uplift of the Vršac Mts occurred ...Bojan Kostić, Uroš Stojadinović, Nemanja Krstekanić, Marija Ružić, Aleksa Luković. "Alpine tectonic evolution of the Northern Serbo-Macedonian subunit: inferences from kinematic and petrological investigations" in EGU General Assembly 2021, Vienna, Austria, 19.-30.4.2021., EGU (2021). https://doi.org/10.5194/egusphere-egu21-202
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method... the possibility of fly ash and slag application as a construction substitute thus preservinglimited reserves of natural building materials. 2. STUDY AREA PPNT A is the most important producer of electricity in Serbia and is built on the bank of the river Sava. PPNT A is 4 km from Obrenovac, PPNT ...
... „Radljevo”, „Zvizdar” and „Ruk- lade”; Fig. 2). Lignite is exploited in fields „C”, „D” and „Tam- nava Zapad”. The D field which is the focus of this study is situated in the eastern part of the Kolubara basin. When exploi- tation began it extended over an area of almost 20km2, now the G eo lo g ...
... located on the right bank of the river Danube, Figure 2. Geological map of the Kolubara basin (from ŽIVOTIĆ et al., 2013). Figure 1. Map of the study area (www.maps.google.com). G eo lo g ia C ro a tica Šešlija et al.: Properties of fly ash and slag from the power plants 319 on the edge of ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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A hundred years of Milutin Milanković's climate change theory - geological implications
Dejan Radivojević (2020)Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт... Paleozoic era, astronomical forcing has not been extensively researched due to the lack of precise geochronology or astronomical modelling. A recent study by WU et al. (2013) examined Milanković’s cy- cles in the Lower Permian strata in southern China which were time-calibrated with high-precision U-Th ...
... crucial to the proposed model. Milanković work- ed on Solar insolation changes for past 650 kyr for more than 100 days which later was used in the study “The Climates of the Geologi- cal past” (KöPPEN & WEGENER, 1924). The mutual work of Köppen, Wegener and Milan - ko vić result in precise Qua- ternary ...
... that main factor for its occurrence was the sudden re- lease of methane hydrate from oceanic sediments caused by massive volcanic eruptions. Recent study by GINGERICH (2019) compared the rate of greenhouse gas accumulation in the PETM to modern climate change today (Fig. 10) and find out that anthropogenic ...Dejan Radivojević. "A hundred years of Milutin Milanković's climate change theory - geological implications" in Geološki anali Balkanskoga Poluostrva, Univerzitet u Beogradu, Rudarsko geološki fakultet (2020). https://doi.org/10.2298/GABP201125011R
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Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7
Part of E-80 highway that passes through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. The route is designed through a typical plain and hilly terrain in which different geological units are dominant: crystalline schists, neogene sediments of foothills and quaternary sediments in the valley ...... enabled registration of large regional structures that are important for highway construction: photo-geological analysis of satellite images, study of rupture pattern and geomorphological occurrences with layout of instability occurrences, neotectonical and seismogeological analysis, determination ...
... Geotechnical Engineering An Environmental Perspective, Taylor & Francis, CRC Pres London. Rakić, D. 2017. Preliminary Design and feasibility study with environmental impact estimation of E-80 highway construction (SEETO Route 7), section Nis – Plocnik, Volume E21: Elaborate of geotechnical ...
... Nis-Merdare highway, Third Serbian Road Congress,Belgrade. Winter, M.G., Mackgregor, F. and Shackman, L. 2005. Scottish Road Network - Landslides Study, Scottish Executive. ...Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković. "Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7" in Proceedings of the XVII European Conference of Soil Mechanics and Geotechnical Engineering ECSMGE-2019, Reykjavik, Iceland, 1-6. 09. 2019., ISSMGE, ECSMGE-2019 (2019). https://doi.org/10.32075/17ECSMGE-2019-0393
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Грешка инклинације код депозиционе реманетне магнетизације
Mirko Petković, Vesna Cvetkov (2019)... faktora elipticiteta neophodno samo poznavanje depozicione remanentne magnetizacije uzorka. Abstract Paleomagnetic investigations deal with the study of remanent magnetization caused by the influence of the Earth's magnetic field in the geological past, with the aim of defining the spatial and ...
... flattening factor for magnetite is in the domain 0.54 ≤ f ≤ 1, and for hematite 0.4 ≤ f ≤ 1. The second numerical approximation, shown in this study, is based on the presumed geological age of the strata from which the samples were taken. The coefficient of the straight line that best approximates ...
... 7. Kodoma, K., (2009): Simplification of the anisotropy-based inclination correction technique for magnetite and hematite-bearing rocks: a case study for the Carboniferous Glenshaw and Mauch Chunk Formations, North America, Geophysical Journal International 176, 467–477. 8. Miličić, M., Miličić ...Mirko Petković, Vesna Cvetkov. "Грешка инклинације код депозиционе реманетне магнетизације" in II Когрес геолога Босне и Херцеговине са међународним учешћем , Удружење геолога у Босни и Херцеговини (2019)
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Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report
Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić (2021)Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić. "Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2021). https://doi.org/10.1007%2F978-3-030-60196-6_19
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Definisanje strukturnih odnosa primenom postupka horizontalni gradijent
Različiti postupci matematičkih transformacija se mogu primeniti na gravimetrijskim i magne tometrijskim podacima, kako bi se na istražnom terenu definisali strukturno-tektonski odnosi. U radu su prikazani rezultati dobijeni korišćenjem postupka horizontalni gradijent i ukupni horizontalni gradijent na gravimetrisjkim podacima. Navedeni postupci su pomogli da se detektuju kontakti sa velikim padnim uglom (vertikalni ili subvertikalni kontakti), koji se mogu interpretirati kao rasedi. Za test područije uzet je istražni prostor koji se nalazi na jugoistoku Srbije u okolini Vranjskog basena. Položaji ...... different methods of mathematical transformation can be applied on magnetic and gravity data, in order to define structural and tectonic correlation in study area. In this paper we present the results obtained using the technique of the horizontal gradient and the total horizontal gradient on gravity data ...
... helped to detect contact with a large dip angle (vertical or subvertical contacts), which can be interpreted as faults. For the test area we take the study area located in southeast Serbia around Vranje basin. The positions of neotectonics faults detected during geological survey in the area of the ...Snežana Ignjatović, Ivana Vasiljević, Natalija Jovanović. "Definisanje strukturnih odnosa primenom postupka horizontalni gradijent" in Tehnika, Beograd : Savez inženjera i tehničara Srbije (2019). https://doi.org/10.5937/tehnika1905664I
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Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001
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The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua. "The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis" in Environmental Earth Sciences, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s12665-021-09392-1
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Centar za hidrogeologiju karsta - 15 godina nauke i struke
... istraživanja karstnih Environmental impact assessment study – Bekhme — izvorišta Čelice i Bjeličkovica (Opština Priboj) za ocenu , Mindawa planning reports (Iraq) podzemnih vodnih resursa i definisanja zona sanitarne _ Environmental impact assessment study — Khazer — zaštite Gomel (Iraq) 1 i Opit trasiranja ...
... on high karst plateaus-West Serbia case study, Environmental Earth Science. Springer, 75:35, https://doi.org/10.1007/s12665-016-5635-0 Pešić, M., Ristić Vakanjac, V, Vakanjac, B., Jovanov, K. (2016): Turbidity simulation for short-term predictions: case study of the karst spring Surdup (Bot, Serbia) ...
... utility and management of karst underground reservoits: case study of the Perućac karst spring, Carbonates and Tvaporites, Vol. 26. pp. 61—68. https://doi.org/10.1007/s13146-011-0048-3 lurkiewicz, A., Stevanovic, Z. (2010): Reconnaissance study o} active sulfide springs and cave systems in the southern ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
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Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... low), (βi=3, moderate), (βi=4, high), (βi=5, very high)}. (13) 4. Case Study Completing a risk assessment for component failures in a technical system is based on the state of the machinery at the time it is observed (in this study, we did this in the context of the exploitation of mineral resources ...
... fuzzy-based decision support model for effectiveness evaluation—A case study of examination of bulldozers. Int. J. Ind. Eng. Theory 2019, 26, 878–897. 28. Tanasijević, M.; Ivezić, D.; Jovančić, P.; Ćatić, D.; Zlatanović, D. Study on dependability evaluation for multi-hierarchical systems based on ...
... or the entire engineering system. The measures taken to reduce the risk of critical parts also depend on this. Risk management should consider and study risk from both an economic perspective and in terms of employee protection from hazards [2]. The most important risk assessment activity is the task ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
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Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication
... international and Czech GACR project: “Leading edge instrumental methods in high resolution global Jurassic-Creta- ceous border correlation”. The study Wwas accomplished by a muhltidisciplinary approach involving micropalaeontological, mac- ropalaeontological, magnetostratigraphic and · geochemical ...
... by cephalopods (ammonites, aptychi and belemnites), brachiopods, and bivalves. Among the most frequent and diverse are ammonites. The current study provides detailed description of many of those ammonites, as well as new results on Z. Vašiček, D. Rabrenović, P. Skupien et al. the litho- and ...
... ammonite Subzones), and the Jurassic-Cretaceous. boundary cannot be constrained. The aim of the current paper is to report the results ofa detailed study of the representatives of the suborders Haploceratina, Peri- sphinctina, Olcostephanina, and three species of ribbed aptychi from the lower Berriasian ...Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović. "Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication" in Cretaceous Research (2023). https://doi.org/10.1016/j.cretres.2023.105623
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Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy
... standards that will guarantee and protect the originality together with the cultural heritage of the Zlakusa pottery. Acknowledgment The present study was supported by the Ministry of Education and Science, Republic of Serbia, Project no. 176010. References DJORDJEVIĆ, B. (2013): In: Lugli ...Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana. "Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy" in 8th Mineral Sciences in the Carpathians Conference, Acta Mineralogica-Petrographica, Miskolc, Hungary, Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, Hungary (2021)
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Pokazatelji recentne tektonske aktivnosti u speleološkim objektima Dževrinske grede (istočna Srbija)
Ana Mladenović, Jelena Ćalić (2022)Sistem Timočkog raseda predstavljen je sistemom desnih transkurentnih raseda generalnog pružanja sever – jug, koji su bili aktivni u periodu oligocena i miocena u okviru Karpato-balkanskog orogena. Početak njihove aktivnosti vezuje se za rotaciju tektonskih jedinica Karpato-balkanida (Dacia Mega Unit) oko rigidne Mezijske jedinice. Aktivnost ovih transkurentnih raseda je akomodirala ovu rotaciju, pa se smatra da je kumulativno kretanje duž Timočkog raseda tokom perioda njegove aktivnosti bilo do 100 km. Usled kompleksnih tektonskih rotacija, rasedi ovog sistema doveli su ...Ana Mladenović, Jelena Ćalić. "Pokazatelji recentne tektonske aktivnosti u speleološkim objektima Dževrinske grede (istočna Srbija)" in 18. Kongres geologa Srbije "Geologija rešava probleme", Srpsko geološko društvo (2022)
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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...... Studentski trg 12–16, 11000 Belgrade, Serbia (Received 14 June, revised 28 August, accepted 29 August 2013) Abstract: The objective of this study was to determine the origin and type of organic matter (OM) in recent sediments of the Tisza River, along a distance of 153 km through the territory ...
... SEDIMENTS 599 anthropogenic impact, an investigation of the origin and type of organic matter in its sediments was the defined objective of this study. For this purpose, group organic–geochemical data and biomarker compositions were used. EXPERIMENTAL A total of 10 sediment samples were collected ...
... ments, apart from heavy fuel oil from tankers, to a lower extent, could be attri- buted to Rusanda and Elemir crude oils. Acknowledgements. The study was funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Project Nos. 176006 and 176019). Nikola ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S