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Упит dcterms_subject_txt:rock breakage by explosives

1093 items

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... (Fig. 5D). Radiolarites of this formation are characterized by an abun­ dance of radiolarian tests, but they are generally strongly recrys­ tallized and very poorly preserved. Sometimes the radiolarians cannot be extracted from the rock: they become partly or com­ pletely dissolved during the maceration ...
    ... Triassic of the Durmitor sub­unit is characterized by thick carbonate plat­ form sediments (RAMPNOUX, 1970; PANTIĆ & RAMPNOUX, 1972), while the more internal Lim sub-unit is characteri zed by a more distal slope or basinal facies represented by cherty lime­ stones (the “Grivska Formation”, DIMITRIJEVIĆ ...
    ... T This research was supported by the Ministry of Education Sci­ ence and Technological Development of the Republic of Serbia, Project No. 176015 and by the Russian Governmental Program no 0135-2018-0033. The authors greatly appreciate the valuable comments given by Hans-Jürgen GAWLICK, Renata JACH ...

  • Balance between tectonics and sedimentation during geodynamic evolution of the Adria-Europe convergence zone in central Serbia

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Tamara Bogdanović (2021)
    ... syn-depositional bimodal magmatism. Fore-arc syn-subductional extension was triggered by retreatingand steepening of the subducting Neotethys lithosphere. The final Campanian–Maastrichtianregression was initiated by large-scale shortening during the onset of Adria-Europe collision. Unlike the European ...
    ... an,Turonian–Santonian, and Campanian-Maastrichtian. Lower Cretaceous–Cenomanian depositionwas associated with regional contraction and characterized by the clastic-carbonatic cyclic shelfand slope deposits (i.e., the “para-flysch”). The European fore-arc “para-flysch” sequences,deposited during Berr ...
    ... European fore-arc domain, the Cretaceous sedimentation over the passive continentalmargin of the Dinarides was exclusively controlled by continuous shortening and overalltransgression over the subducting Adria plate. Deposition starts with transgressiveAlbian–Cenomanian coarse-clastics and gradually deepens ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... analysis and visualization of geologi- cal data. The development and implementation of GeolISS is managed by a team from the Faculty of Mining and Geology at the University of Belgrade (FMG) and funded by the Ministry of the Environment, Mining and Spatial Planning (MEMSP). The main goal of the implementation ...
    ... is constantly being developed. While systematizing data from different geological research funded by the MEMSP before entering them into the geological database, we realised that certain data, which by their content and structure did not cor- respond to the initial geological database design, could still ...
    ... l research with the aim of creating a geological and hydro-geological information system of the Tara National park, 2008-2011, funded by the Ministry, carried out by FMG, DRAGISIC. Fig. 2. Map of the Tara National park. developed with the use of PHP script language, jQuery library for text animation ...

  • Combining Heterogeneous Lexical Resources

    Cvetana Krstev, Duško Vitas, Ranka Stanković, Ivan Obradović, Gordana Pavlović-Lažetić (2004)
    development of lexical resources, morphological dictionaries, WordNet
    ... synset, which can be chosen in several ways: simply by typing one of its literal strings, or by selecting it by means of the bilingual list, by following the hypernym/hyponym or some other relation from the current working synset, or even by typing one’s own XPath expression. An edit form is ...
    ... adjective derived from its passive past participle povezan. The type of derivational link is marked by the plus sign—the progressive verb by the +Imperf mark and the passive past participle by the +PP mark. Similarly, the progressive verb povezivati in the second line of the example (5) is ...
    ... assigned to a lemma in DELAS can be used by Intex to formulate complex queries. For instance, the query would retrieve all the possessive adjectives from a text that do not belong to the Ekavian pronunciation. The entries in DELAS can be enriched by derivational links that group together ...

  • 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
    ... reported by POLOMČIĆ & BAJIĆ (2014). There are many FAHP approaches suggested by different authors in the literature. LAARHOVEN & PEDRCYZ (1983) initiated the first studies that applied fuzzy logic and the analytic hierarchy process. They used triangular fuzzy numbers to express the evalua- tion by the decision ...
    ... alternatives 1, 2 and 3, as a result of control system operation. above, the solution produced by hydrodynamic calcu- lations was optimized by means of fuzzy extent analy- sis, an FAHP approach proposed by (CHANG 1996). This method is based on triangular fuzzy numbers and Saaty’s pairwise comparison ...
    ... angular fuzzy number. If this number is denoted by M(l,s,d), as illustrated in Fig. 3, it is defined by its membership function as follows: The correlation between the numerical values of triangular fuzzy numbers and linguistic variables is represented by fuzzified Saaty’s scale (CHANG 1996; DENG 1999; ...

  • 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

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... OF The geOlISSTerm TermINOlOgIcAl DIcTIONAry mation is the fundamental unit in lithostratigraphic classification. A formation is a body of rock identified by lithic characteristics and stratigraphic position; it is prevailingly, but not necessarily, tabular and is map- pable at the earth’s surface ...
    ... project The Development of Geologic Terminol- ogy and Nomenclature for the Geologic Database of Serbia carried out by the Faculty of mining and geology, University of Belgrade, funded by the ministry of the environment and Spatial Planning of the republic of Serbia. A short history of geolISSTerm and ...
    ... geolISS are illustrated by screenshots of the interface. The possibilities of exporting the vocabulary to standard ontology languages, such as the OWl, modelled on the geoSciml initiative are planned to be provided. The electronic edition of the dictionary is complemented by the printed version. Keywords ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... January 2023 Copyright: & 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:/ / creativecommons.org//licenses/by/ 4.0/). Department of Chemistry ...
    ... "C, Tc is significantly lower (=%420 "C). This can be explained by the fact that Curie temperature decreases with an increase in Zn content due to the weaken- ing of A-B superexchange interaction caused by the replacement of Fe9+ by Zn?* ions at tetrahedral sites. 20 18|- 16| 144| s | ...
    ... tered at 1150 ?"C, there was a sharp fall in mass magnetization due to the phase transition caused by partial destruction of the domain structure within the crystallites from 340 *C to 400 ?C, followed by a gentle fall in mass magnetization up to 480 ?C. Then, the biggest fall due to thermal effects ...

  • Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species

    Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)
    Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...
    microstructure, microwave-hydrothermal synthesis, adsorption, magnetic nanoparticles, arsenic

  • Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study

    Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)
    Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...
    Pharmaceutical Science
    ... Accepted 3 August 2023 Available online 6 August 2023 0928-0987/6) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/). J.R. Mitrović et al. with their other psychomotor or anticonvulsant effects ...
    ... measuring particle size and calculating redispersibility index, as well as by solid-state analysis (by differential scanning calorimetry and X-ray powder diffraction) and visualization of morphology (by scanning electron microscopy and polarized light microscopy). Finally, the extent of interactions ...
    ... stabilizer layer of the nanoparticles, resulting in aggregation of the particles. Lyoprotectants stabilize nanoparticles by replacing the hydrogen bonds of water, as explained by the water replacement hypothesis (Trenkenschuh and Friess, 2021). Disaccharides are the most commonly used cryoprote ...

  • Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?

    Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov (2024)

  • Sepiolite – a by-product of exploitation as a potential raw material in Serbian industry

    Radmila Gaćina, Katarina Urošević, Jelena Zakonović (2019)
    This paper gives a brief overview of the sepiolite deposits, the basic properties, and the possibilities of using this mineral. Particular attention is paid to sepiolites from domestic production, especially the use of sepiolites suitable for the development of small businesses and technologies, with a focus on environmental protection. Aim of this paper is to point out importance of this mineral and to draw attention to the use of domestic raw materials. With appropriate mechanical and chemical pretreatments, sepiolite is ...
    sepiolite, by-product, small-scale mine, marginal costs,

  • U-Pb zircon geochronology of the Paleogene – Neogene volcanism in the NW Anatolia: Its implications for the Late Mesozoic-Cenozoic geodynamic evolution of the Aegean

    E. Yalçın Ersoy, Cüneyt Akal, Ş. Can Genç, Osman Candan, Martin R. Palmer, Dejan Prelević, İbrahim Uysal, Regina Mertz-Kraus (2017)
    The northern Aegean region was shaped by subduction, obduction, collision, and post-collisional extension processes. Two areas in this region, the Rhodope-Thrace-Biga Peninsula to the west and Armutlu-Almacık-Nallıhan (the Central Sakarya) to the east, are characterized by extensive Eocene to Miocene post-collisional magmatic associations. We suggest that comparison of the Cenozoic magmatic events of these two regions may provide insights into the Late Mesozoic to Cenozoic tectonic evolution of the Aegean. With this aim, we present an improved Cenozoic stratigraphy ...

  • Crystallographic, spectroscopic, thermal and computational studies of polymeric cobalt(II)–mellitate complex with 2,2′-bipyridine

    Lidija Radovanović, Dušan P. Malenov, Marko V. Rodić, Aleksandar Kremenović, Jelena Rogan (2021)
    Orange single crystals of new polymeric cobalt(II) complex {[Co(bipy)(H2O)4]2[Co(μ-mell)(H2O)2]·10H2O}n, 1, were synthesized by slow evaporation method at room temperature (bipy = 2,2′-bipyridine, mell = hexaanion of mellitic acid) and its crystal structure was determined by single-crystal X-ray diffraction. The complex 1 was characterized based on elemental analysis, FTIR spectroscopy and thermal (TG/DTA) analysis followed by computational analysis of noncovalent interactions and quantum chemical calculations of interaction energies. In 1, two crystallographically different Co(II) atoms adopt a deformed octahedral geometry, ...
    Inorganic Chemistry, Organic Chemistry, Spectroscopy, Analytical Chemistry

  • A Lexical Approach to Acronyms and their Definitions

    Cvetana Krstev, Duško Vitas, Ranka Stanković (2015)
    In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.
    ... Committee’ but the distinction cannot be made by a simple “initial upper-case” rule. Acronyms, much as other words in Serbian, are charac- terized by grammatical categories of number and gender, and they may inflect in case. The inflection is expressed by inflectional endings added after a hyphen. ...
    ... and this was established by test like (13) and (14). For all remaining the simple rule of thumb was used – all are singular, and only those that end in -a are in the feminine gender. 4. Results In Table 4. we present the results obtained by our pro- cedure, step by step. In Table (acr., infl ...
    ... acronym-definitions by looking into results obtained by this research. On the basis of the presented approach we plan to en- hance our approach to domain specific acronyms, where an “upper-case” principle may not be applicable. Acknowledgments This research was supported by the Serbian Ministry ...

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... More and more often knowledge offered by academic programs lags in some of its aspects after expert knowledge available in large enterprises. The integration of newly emerged knowledge generated by technological development into academic programs by renewing the curricula in ever shortening ...
    ... of software implementation in practice and the like. In Section 2 we describe the goals that are to be achieved by our approach. An insight in the platform illustrated by a conceptual map is given in Section 3, while section 4 offers more details on its language support system. Conclusions ...
    ... and in the case they are bilingual or multilingual, corresponding terms are usually linked by appropriate mechanisms. Taxonomies feature semantic relations between terms, or rather concepts represented by specific terms. The basic semantic relationship, hypernym/hyponym, connects the broader ...

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... 2004, showed the following variations: - the content of SiO2 is lower by about 2 %, - the content of Al2O3 is increased by 1 to 1,5 %, - the content of Fe2O3 is lower by 1 to 1,5 %, - the content of CaO in the ash is lower by about 7 %. Laboratory testings of fly ash ...
    ... Preliminary note Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate- glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion ...
    ... Introduction Fly ash is one of the most common waste materials created by burning of coal [1]. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion ...

  • 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

  • An update on the mineral-like Sr-containing transition metal arsenates

    Tamara Đorđević, Ljiljana Karanović (2021)
    We report on the crystal structures of three novel synthetic SrM-arsenates (M = Ni and Fe3+), isostructural or structurally related to the minerals from tsumcorite, carminite and brackebuschite groups. They were synthesised under mild hydrothermal conditions and further characterised using single-crystal X-ray diffraction (SXRD), scanning electron microscopy with energy dispersive spectroscopy (SEMEDS) and Raman spectroscopy. SXRD and SEM-EDS yielded formulae: (I) SrNi2(AsO4)2·2H2O, (II) Sr1.4Fe3+ 1.6(AsO4)2(OH)1.6 and (III) SrFe3+(AsO4)(AsO3OH). All three structures are built up of slightly distorted MO6 octahedra ...
    арсенати метала, кристална структура, дифракција рендгенских зрака на монокристалима, хидротермална синтеза, Раманова спектроскопија, релевантна једињења у животној средини, арсенeochemistry and Petrology