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Упит dcterms_subject_txt:method of least squares

2837 items

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations

  • The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis

    Ljiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua (2021)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)

    Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick (2024)
    Triassic, Carnica event, clay mineralogy, conodont biostratigraphy, Neo-Tethys

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... MARKUP OF OER CONTENT WITHIN THE BAEKTEL PROJECT RANKA STANKOVIĆ University of Belgrade, Faculty of Mining and Geology, ranka.stankovic@rgf.bg.ac.rs DANIELA CARLUCCI University of Basilicata, Matera, Italy, daniela.carlucci@unibas.it OLIVERA KITANOVIĆ University of Belgrade, Faculty of Mining ...
    ... search and browse of OER content and provides the infrastructure for successful search engine optimization of education resources published within BAEKTREL project. With variety of content and the expected growth of the number of resources, as well as different profiles of potential users ...
    ... rs NIKOLA VULOVIĆ University of Belgrade, Faculty of Mining and Geology, nikola.vulovic@rgf.bg.ac.rs BOJAN ZLATIĆ University of Belgrade, Faculty of Mining and Geology, bojan.zlatic@rgf.bg.ac.rs Abstract: This paper outlines the approach to tagging of OER content with metadata within ...

  • Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?

    Alena Zdravković, Maja Milošević, Ivana Jelić (2021)
    ... darken by the time it was assumed that the model is gilded. Material and method Chemical composition of the gypsum model surface was carried out in the Laboratory for SEM, Faculty of Mining and Geology, University of Belgrade, using a JEOL JSM-6610LV scanning electron microscope, coupled ...
    ... f.bg.ac.rs Introduction The Collection of Rocks and Minerals, Faculty of Mining and Geology, the University of Belgrade in Serbia, has been holding over a hundred years the gypsum model of triangular shape that represents the replica of one of the world’s largest native gold nugget weighing ...
    ... Collection of Rocks and Minerals, is part of old and numerous mineral collection which numbered 1525 samples donated by the St. Petersburg’s State Mining Institute of the empress Catherine II (precursor of Saint Petersburg State University) to the Mineralogical Cabinet of Great School of Belgrade ...

  • Examination and characterization of nanostructured Co0.9Ho0.1MoO4

    Милена Росић, Маја Милошевић, Мариа Чебела, Владимир Додевски, Весна Лојпур, Марија Васић, Александра Зарубица (2023)
    ... to be the most effective and simplest method suitable for controlling the composition and morphology of CoooHooiMoOua. To prepare nanostructured CoooHoo,MoOua, metal nitrates, and glycine were mixed in appropriate stoichiometric ratios. For the preparation of the technologically important CooHoop ...
    ... promising method that achieves control of stoichiometry, homogeneity, and purity. The synthesized samples were examined by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The ...
    ... Belgrade, Serbia ŠDepartment of Atomic Physics, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia "Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 ...

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... KNOWLEDGE IVAN OBRADOVIĆ University of Belgrade, Faculty of Mining and Geology, ivan.obradovic@rgf.bg.ac.rs RANKA STANKOVIĆ University of Belgrade, Faculty of Mining and Geology, ranka.stankovic@rgf.bg.ac.rs JELENA PRODANOVIĆ University of Belgrade, Faculty of Mining and Geology, jelena.prodanovic@rgf ...
    ... segments of knowledge. The BAEKTEL language support system consists of several software components handling simultaneously several types of language resources: grammars, lexical and textual resources (Fig 2). One of the basic lexical resources is the system of morphological dictionaries of Serbian ...
    ... systems (LMS) — have enabled further advances in the sharing of educational ideas, materials, and knowledge" [2]. The idea and practice of offering free educational resources in the form of courses through the Internet in the form of MOOCs (massive open online courses), were developed and ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • Improvement of education through the cooperation between CEEPUS EURO Geo-Sci network and scientific projects: examples from UB-FMG

    Kristina Šarić, Dejan Prelević, Miloš Marjanović, Uroš Stojadinović, Vladimir Simić (2024)
    CIII-RS-0038, Recon Tethys, DEMONITOR, TMCmod, REASONING

  • Analysis of the exhaust emissions inventory from auxiliary mining machines

    Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)
    Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...
    emissions, mining, auxiliary machines

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... dashed. Black rectangle shows the position of the inset in right part of the figure. Inset: Simplified geological map of a segment of the Senje-Resava Basin thrusted by Permian sediments of Upper Getic sub-unit (simplified and modified after Basic geological map of former Yugoslavia, scale 1:100.000 and ...
    ... E-ward thrusting of the Upper Getic sub-unit, which was driven by a transfer of deformation in the orocline and around the Moesian Platform during the last stages of Carpathians collision. These results show that the mechanics of oroclinal bending is associated with the activation of strike-slip faults ...
    ... discussed in the context of the regional evolution of Carpathians–Balkanides and Dinarides orogenic systems and in terms of strain partitioning during oroclinal bending. 2. Tectonic evolution of the Serbian Carpathians and associated sedimentary basins The Serbian segment of the Carpathians–Balkanides ...

  • Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy

    Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana (2021)
    ... traditional coiling method on a hand rotated wheel, while sample 2 was made with the application of a modern mould technique. A microscopic examination of the thin sections revealed a uniform mineral composition. No significant differences were observed regarding the inner sections of the pots and ...
    ... higher amount of calcite grains. EDS analysis gives clear differences in the chemistry of the samples. Sample 1 has a higher content of most investigated elements when compared to sample 2, except K and Ca. Amount of K and Ca elements could indicate the presence of a higher amount of illite minerals ...
    ... the obtained knowledge in the preservation of this type of cultural heritage in Serbia. Results and discussion Clay paste is a mixture of raw clays, consisted of kaolinite/halloysite, illite and smectite minerals followed with smaller amounts of quartz, feldspar and iron oxy/hydroxides ...

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    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
    ... statistical analysis of poles to foliation shows foliation dip direction/dip maximum of SSMM 058/32° with a significant variability in Fig. 3. Simplified structural map of the Vršac Mts. with stereonet density plots of foliation poles and stretching lineation and stereonet projec- tions of dextral strike-slip ...
    ... study was supported by the Minis- try of Education, Science and Technological Development of the Republic of Serbia. The authors acknowledge excellent comments and suggestions of Dr. Ioan Munteanu and an ano- nymous reviewer that improved the original version of the manuscript. The authors are grateful ...
    ... low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the crystalline basement of the Vršac Mts. The subsequent Oligocene–Miocene extension, which led to the formation of the Pannonian Basin, overprinted the effects of earlier tectonic phases to a large ...

  • Evaluation And Perspectives Of Underground Coal Mines In Serbia

    Vladimir Milisavljević, Milena Lekić, Ivica Ristović, Vojin Čokorilo, Aleksandar Cvjetić (2017)
    ... weights of the parameters in the solution of a multi-criteria problem. In the AHP method, a hierarchical model consisting of objectives, criteria, sub-criteria and alternatives is used for every problem [5]. Solving a problem using AHP is carried out using the weights or priorities of the criteria ...
    ... matrix (Table 5). While performing pairwise comparisons of criteria in the AHP method, a certain level of inconsistency may occur. Therefore, the logical consistency of pairwise comparisons must be checked [6]. To measure the consistency of pairwise comparison judgments, the consistency ratio proposed ...
    ... AHP method and scores allocated for each factor, the mines were ranked according to technical potential. Key words: Underground mining, Potential, Restructuring, Evaluation Introduction Serbia is one of the major coal producers in Europe, with over 38 Mt of coal per year. But most of this ...

  • A bilingual digital library for academic and entrepreneurial knowledge management

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Dalibor Vorkapić (2015)
    A generic knowledge management process of organization, storage and retrieval of knowledge can suitably be fitted in a digital library. In the digital and knowledge age digital libraries can be used in knowledge management to handle intellectual assets and support knowledge creation. A multilingual digital library either stores content in more than one language or provides multilingual query access to monolingual content. In Serbia 18 of 308 scientific journals regularly published are bi-lingual, with papers simultaneously being in English ...
    Knowledge management, Digital library, Multilingualism, Language Resources, Terminology
    ... in France (Laboratoire Lorrain de Recherche en Informatique et ses Applications) are used for alignment. The alignment method is based on the number of characters (length of the segment). Utvić reports that this approach is very successful (as much as 96% correctly paired documents). XAlign is ...
    ... Faculty of Mining and Geology University of Belgrade Đušina 7, 11000 Belgrade, Serbia E-mail: ranka.stankovic@rgf.bg.ac.rs Cvetana Krstev Faculty of Philology University of Belgrade Studentski trg 3, 11000 Belgrade, Serbia E-mail: cvetana@matf.bg.ac.rs Biljana Lazić Faculty of Mining ...
    ... example of multi-lingual concordances 5.2 Metadata search It is also possible to search and browse a collection by metadata in order to analyse the whole content of a collection. The search of the Serbian or English part of the collection using an author’s name, words in the title, year of publishing ...

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... Understanding the dynamics of key economic indicators at the na- tional level and the key characteristics of the electricity sector is crucial for assessing the impacts of the ETS on the expenditure side of GDP in a specific economy. A comprehensive analysis of the state of the Serbian economy and ...
    ... sells 99.9% of electrical energy. The separation of operators of the transmission and distribution systems of electricity is executed through the Joint Stock Company “Elektromreža Srbije” (EMS) for the transmission of electricity, which is 100% state-owned, and Electric Distribution of Serbia Limited ...
    ... The structure of electricity production by energy sources in Serbia (%) (2013—2022) (Statistical Office of the Republic of Serbia, 2023). Recommendation of the Ministerial Council of the Energy Community, Serbia prepared an INECP covering the period from 2021 to 2030 (Republic of Serbia, 2023) ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...
    ... implementation of the approach relies on available mine ventilation software as well as on the possibilities offered by the coupling of various artificial intelligence (AI) methods in the solution of complex problems that cannot ade- quately be solved by a single AI method. The core of the implemented ...
    ... analyses of a concrete ventilation system. Figure 4 illustrates the ResNet software package through its interface forms. The outlined software permits an aero- dynamic definition of mine ventilation network based on barometric method, i.e. the establishment of actual aerodynamic resistance of mine workings ...
    ... 377 of the location and size of booster fans in the “Soko” mine ventilation system, us- ing another AI method, the genetic algorithm (GA).6,12,13 A canonic scheme giving airflow distribution in the “Soko” mine is given in Fig. 14. The location of ex- ploitation workplaces and the position of fans ...

  • Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides

    Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević (2021)
    ... measure the efficiency of inorganic and organic modified montmorillonites for the sorption of the S-metolachlor. Mineralogical characterization of natural clay samples was performed using the X-ray diffraction method. This method was also used in order to track structural ...
    ... different concentrations of two organic complexes (HDTMA, PTMA). Chemical analysis of the sample showed that natural montmorillonite from Bogovina (Serbia) was Ca montmorillonite.  The whole modification process was monitored using several methods. The batch adsorption method was used to measure ...
    ... from the environment. The efficiency of the sorption of S-metolachlor by montmorillonite depends on the size of the interlayer space, the type of interchangeable cation, and also on the characteristics of the montmorillonite surface. Disclosure of Interest: None Declared Keywords: ...

  • Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia)

    Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić (2019)
    ... decrease of content of short-chain (С15-Сг0) and increase of long-chain (Cz6-Ca3) homologues. The obtained results suggest lowering of the water table during the formation of the Main coal seam. This change resulted in lesser inundation and deposition of MM associated with smaller input of bacterial ...
    ... ratios (6'3) of individual biomarkers were used to evaluate the origin and depositional environment of OM. The content of vitrinite group macerals increases from top to bottom of the Main coal seam which is associated with a notable decrease of liptinite and mineral matter (MM). Contents of collotelinite ...
    ... Development Office - Belgrade, Makedonska 33, 11000 Belgrade, Serbia 5; University of Belgrade, Innovation Center of the Faculty of Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia 6; University of Belgrade, Faculty of Mining and Geology, Đušina 7, 11000 Belgrade, Serbia *: Corresponding Author: ...