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Упит dcterms_subject_txt:mature field

511 items

  • From post-disaster landslides inventory to open landslides data

    Biljana Abolmasov, Miloš Marjanović, Uroš Đurić, Jelka Krušić (2021)

  • Overview of the hydrogeological investigations of recently discovered world class deposits in Serbia

    Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović (2019)
    Europe industry has growing concerns on availability of the raw materials. To address this challenge, the European Commission has created a list of critical raw materials for the EU, launched EIT Raw Materials initiative, and continuously support research projects (like INTRAW, UNEXMIN etc.) with the aim of reducing the dependency and meeting growing demands. In the last 15 years Serbia is experiencing new bust in geological exploration of mineral deposits. Currently 167 exploration licenses are active, covering approximately 6000 ...
    Groundwater, Raw materials, Lithium, Mining, Field hydrogeology

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... language of a given subject field”. 3 Terminological theory arose through practical experience and as such was supported by information sciences. There is widespread theory of four basic periods in development of terminology, the origins, the structuring of the field, the boom and the expansion ...
    ... accurate translations are produced. To summarize above mentioned, terminology now constitues a very important field of Natural Language Processing whilethe work that has been done in the field of terminologyhas become to be an indespensible, widespread used resource. The standards related to terminology ...
    ... instruction and the other consists of NLP tools for analysis and use of language by machines [1]. The usage and application of the research done in the field of the NLP has been present in the domain of education from the 1960s. One of the first advances made in this direction was the pioneering work of ...

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... [7, 8, 10, 11-13]. For the assumed UCG exploitation field, fig. 5, the Pilot Plant (with thickness of the coal layer h = 6 m; p,= 1.3 t/mš) needs to be pro- cessed by gasification: 25 m 75m Figure 6. Exploitation Pilot Plant field for O, =75-50·:6·:1.3=29250tofcoal (3) UCG in Serbia ...
    ... for gasification, is suitable, this significantly mitigates the overall possible field subsidence or ecological disturbance. Generally, with increasing depth of subsid- ence, the subsidence on the surface of the field is bccoming less pronounced [16, 17]. A special advantage, which is related to ...
    ... holes. In order to achieve the most efficient use of coal resources, the borehole grid is drilled through the ground in the selected exploitation field, fig. 2. Connections between injection and production boreholes require additional ac- tivities to ensure the predicted path of the generated ...

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    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
    ... divided into three coal fields: the Drmno field in the eastern, the Ćirikovac field in the central and the Smederevsko Podunavlje field in the western parts of the basin (Fig. 3). The Drmno and Ćirikovac fields are ex- ploited, while the Smederevsko Podunavlje field is still under pre- liminary exploration ...
    ... represented by outcropping and erosion of the Main coal seam. The western border of the deposit is a natural extension to the G field and the southern boundary to the E field. The eastern border is also marked by outcropping of the Main coal seam (ŽIVOTIĆ et al., 2013). Since 1896, about 883.2Mt of ...
    ... nava Istok”, „Tamnava Zapad”, „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 ...

  • The ‘Umka’ landslide

    Uroš Đurić, Dragana Đurić, Miloš Marjanović, Biljana Abolmasov, Ivana Vasiljević (2024)
    We present an in-depth landslide map of the ‘Umka’ landslide near Belgrade, Serbia, at a scale of 1:5000. The map delineates elements at risk, primarily buildings and road infrastructure impacted by the landslide displacements of several cm per year, introduced during frequent reactivation stages. The Main map results from a survey of over 350 buildings and more than 7 km of state and local roads. The acquisition techniques included engineering geological field mapping, building survey, and visual interpretation of ...
    rizik od klizišta, elementi rizika, kartiranje pomoću drona, ispitivanje objekata, geotehnički monitoring

  • Definisanje parametara čvrstoće na smicanje kod izvođenja kosina u ispucalom stenskom masivu

    Zoran M. Berisavljević (2016-04-01)
    Definisanje parametara čvrstoće na smicanje ispucalih stenskih masa predstavlja jedanod najzahtevnijih zadataka mehanike stena. Geotehnička istraživanja su uglavnomograničena na rezultate laboratorijskih ispitivanja malih makroskopski homogenihuzoraka, sa kojih se vrši ekstrapolacija rezultata na terensku razmeru. Ispitivanja semogu vršiti in situ, ali su i ona ograničena veličinom korišćene aparature imikrolokacijom na kojoj se vrše ispitivanja. Pored toga, moguće je vršiti različitaispitivanja na fizičkim modelima, koja su veoma složena i skupa. Ekstrapolacijapodataka sa malog uzorka na terensku razmeru daje mnogo bolje rezultate ...
    naponsko stanje, ispucalost, heterogenost, čvrstoća na smicanje, geološki indeksčvrstoće, Hoek-Brownov materijal, kompozitni uzorci, dezintegracija, povratna analiza

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... interpretation due to closeness to the direction of present Earth magnetic field on the sampling area. Magnetic readings for the field orientation of the cores were corrected using IGRF-12 International Geomagnetic Reference Field model (Thébault et al. 2015). The age determination was done by Milena Duncié ...
    ... parameters. The outliers could have been affected by moderate post-emplacement tilting, though we have no field evidence for this. Emplacement during the excursions of the Earth magnetic field cannot be excluded, either. The igneous rocks of Oligocene age from the Kopaonik Mts. area, dacitoandesites ...
    ... and volcanoclastic rocks confirm the latter view (Cvetković et al. 1995). 3 Paleomagnetic sampling The paleomagnetic samples were drilled in the field with a portable gasoline powered motor drill. All were oriented with a magnetic compass, the igneous samples also with a sun compass. The geographic ...

  • Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia

    Filip Arnaut, Dragana Đurić, Uroš Đurić, Mileva Samardžić-Petrović, Igor Peshevski (2024)
    General Earth and Planetary Sciences
    ... From geomagnetic data (surveys in Serbia and North Macedonia), the total intensity of the Earth's magnetic field anomaly map (Fig. 4b) was calculated. The normal magnetic field was computed using the Geomagnetic Institute'"s (Grocka) formula for the epoch 1960.0. RTP was applied to these ...
    ... RF and KNN algorithms. The analysis of feature importance revealed that the Bouguer gravity anomaly map, total intensity of the Earth's magnetic field reduced to the pole map, distance to fault map, band ratio BR3 map obtained from multispectral satellite images, and digital elevation model are the ...
    ... 7600000 7550000 Earth Science Informatics (2024) 17:1625–1644 7600000 Legend D Study area D Training area D Testing area Ophiolite Field samples Tectonic unit Serbia Bulgaria Greece North Macedonia Albania Country Borders 50 00 00 0 48 00 00 0 46 00 00 0 47 00 00 0 4 ...

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)
    ... 2002. Тhe use of geophysical tech- niques in archaeological evaluations. Technical Paper No 6, Institute of Field archaeologists. IFA paper No.6. Ed: Ali- son Taylor, Published Institute of Field Archaeologists, University of Reading: 1-24. Lahti, I., Karinen, T. 2010. Tilt deriva- tive multiscale edges ...
    ... savremenog MPZ, te se za po- stupak RTP koriste vrednosti preuzete iz matematičkih modela globalnog MPZ (IGRF-International Geomagnetic Refe- rence Field; WMM-World Magnetic Mo- del) za datum kada je rađena akvizicija podataka. Na malim geografskim širinama postupak RTP ne daje dobre rezultate zbog ...
    ... nauke 5: 83-110. Cheyney, S., Hill, I., Linford, N. 2011. Advantages to Using the Pseudogravity Transformation to Aid Edge Detection of Total Field Archaeomagnetic Data- sets. Archaeological Prospection 18 2: 81-93. Clark, A. 1990. Seeing Beneath the Soil: Prospecting Methods in Archaeology ...

  • 3D modeling and monitoring of karst system as a base for its evaluation and utilization: a case study from eastern Serbia

    Saša Milanović, Zoran Stevanović, Ljiljana Vasić, Vesna Ristić-Vakanjac (2013)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... depths and dimension of occurrence do not allow using regular geotechnical investigations. Validation of results was made by comparing against the field investigation and high resolution Digital Terrain Model (DTM), also. Final models show accurate results comparing to the depths in deposition zone ...
    ... process of debris flowing from initiation zone to main deposition area, modeled via SPH. Validation of results was made by comparing against the field investigation and high resolution Digital Terrain Model (DTM). Concerning entrainment of material, which was deep in some parts of debris flow process ...
    ... momentum of pore water, B. the balance of linear momentum of the mixture, C. a kinetic relation between the deformation-rate tensor and velocity field, and SCG-XIII INTERNATIONAL SYMPOSIUM ON LANDSLIDES. CARTAGENA, COLOMBIA- JUNE 15th-19th-2020 D. rheological equation relating the soil-stress ...

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Fragmentation Size Prediction of Blasted Material Using a Specialized Software for Drilling and Blasting

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić, Miljan Gomilanović (2024)
    Design and optimizing the drilling and blasting parameters, should fill the requirements for the capacity, fragmentation size, and technical characteristics of loading and transport equipment, and enable a safe work at the open pit. Besides mentioned, it also achieves the minimal impact on the environment of the open pit and decreases the negative effects on the environment, especially in the blast vibration and flyrock. To obtain the best possible blasting effects and consider all the factors, a specialized software is ...
    optimization, O-Pitblast, drilling, blasting, fragmentation size

  • Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia

    Zoran Stevanović, Veljko Marinović, Branislav Petrović (2020)
    У циљу оцене стања животне средине и разумевања потенцијалних узрока још раније евидентираног лошег хемијског статуса водног тела подземних вода „Крш–север“, извршенa je хидрогеолошка проспекција шире околине лежишта бакра Мајданпек, која је укључилаистраживање површинског копа, флотационог језера и главних карстних врела и пећина. Имајући у виду да се експлоатационо поље рудника бакра Мајданпек директно граничи са карстном издани и водним телом подземних вода „Крш–север“, параметри квалитета подземне воде су анализирани (in situ и лабораторијски) на два главна карстна врела ...
    Опасне супстанце, карстна издан, бакар, флотацијско језеро, Мајданпек, Србија

  • Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... Sad, Serbia Programme and Book of Abstracts of The ECerS 15 Conference for Young Scientists in Ceramics (CYSC-2023) publishes abstracts from the field of ceramics, which are presented at traditional international Conference for Young Scientists in Ceramics. FEditors-in-Chief Prof. Dr. Vladimir ...
    ... different experimental techniques (differential thermal analysis (DTA), X-ray diffraction (KRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning eclectron microscopy (FESEM), and inductively coupled plasma (ICP)). 65 ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... desired component in mixed gases dissolved by chemical and physical solvents and used mostly for precombustion and post combustion[38]. Absorption is a mature and well- established separation method that results in high capture efficiency however the energy cost incurred is very high mainly because of ...
    ... storage since the original recovery takes a lot of gas from the field and the injected CO- can aid to re-pressurize the field to its original form. Fields with water aquifer are not ideal since water might have invaded the original field hence it could increase the pressure beyond the initial pressures ...
    ... are not considered a likely leakage pathway for depleted field storage. Advantages of using partially or fully depleted oil and gas fields as carbon storage sites over others are the abundance of data and know-how acquired over the field cycle [81]. Computer models have been developed in the oil ...

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... .rs/index.php/osnivaci/?lang=en results in the field of NLP for Serbian are presented in [7]. 4 Given its interdisciplinarity, NLP is not envisaged as a study programme in the Serbian higher education system. Some courses from the field are presented to students at the Universities of ...
    ... answering, from detecting people's opinions about products or services to extracting appointments from your email. [2] A short overview of the field of CL/NLP is given in section 2 of this paper. In order to complement a lack of OER in Serbia we have decided to develop the OER course “Lexical ...
    ... started to attract attention of researchers in Serbia more than 35 years ago when Professor Duško Vitas initiated the interest in CL as a research field in Serbia, broadened its influence, and established the group of interested researchers. The first courses at University of Belgrade were introduced ...

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... GeolISS development, which is aimed at the integration of existing geologic archives, data from published maps on different scales, newly acquired field data, and intranet and internet publishing of geologic is given, followed by the description of the geologic multilingual vocabulary and other lexical ...
    ... GeolISS development, which is aimed at the integration of existing geologic archives, data from published maps on different scales, newly acquired field data, and intranet and internet publishing of geologic information. The second section introduces various lexical and terminological resources ...
    ... properties. Terms in the vocabularies are used to classify observations/interpretations, or to specify attribute values. Observation implements field data records and measurements, the basis for classification, interpretation and modeling of geological features. Spatial entity is treated as ...