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Упит dcterms_subject_txt:rock breakage by explosives

1113 items

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... Three phases of a text correction: 1) Marking of incorrect/unrecognized words by e-dictionaries; (2) Automatic correction by offering possible candidates; (3) Elimination of incorrect candidates and correction of remaining errors by a reader. 3 Diacritic restoration The problem of diacritic restoration ...
    ... characters can be omitted while still allowing text reconstruction by humans. Following this line of research the first practical solutions to correcting spelling errors emerged. The idea of a program that corrects spelling errors is reported by Blaire (1960). It consists of weighting the letters to create ...
    ... errors produced by humans (typographic errors, author’s ignorance) or machines during transmission and storage (Peterson, 1980). Peterson, as many other authors, classifies typographic errors into four groups: insertions, deletions, replacements and reversals. However, texts pro- duced by humans can also ...

  • 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
    ... Besides searching by metadata, Bibliša offers a full-text search by keywords of the user’s choice. A user’s original query, which can be issued in each of the two languages, can be expanded in several different ways: by translating into other languages, morphologically by including all inflected ...
    ... metadata and full-text search by entering queries in one of two languages. For a full-text search the user formulates the initial query as one or more keywords (simple or multiword). By default, the system will search all collections, but the user can restrict it by selecting a particular collection ...
    ... 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 and keywords (either individually or by combining some or all of them) is available by clicking ...

  • 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 ...

  • 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

  • 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 ...

  • 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)

  • 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 ...

  • Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study

    Ksenija Micić, Miloš Marjanović, Biljana Abolmasov (2024)
    Debris flows are among the most dangerous erosional geohazards due to the fast rate of movement and long runout zones. Even though the initiation can be triggered in mountainous areas, inhabited and with steep slopes, their propagation and deposition can endanger not only buildings and infrastructure in the urbanized areas, but also threaten human lives. As these initiation areas usually represent unattainable terrains with rapid vegetation cover development, field observations and aerial photo analysis become high-demanding tasks. Consequently, medium-to-regional ...
    tečenje drobine, Flow-R, procena podložnosti, empirijski model

  • 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

  • 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,