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Упит dcterms_subject_txt:rock breakage by explosives

1106 items

  • 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 ...

  • 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

  • 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

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • 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

  • Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia

    Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)
    ... Governmental institutions. Acknowledgements Project BEWARE (BEyond landslide aWARE- ness) is funded by People of Japan and coordinated by UNDP Office in Serbia (grant No 00094641). All activities are supported by Ministry for Education, Science and Technological Development of the Republic of Serbia Project ...
    ... implemented by the Geological Survey of Serbia, and the University of Belgrade Faculty of Mining and Geology. The Project partners were UNDP Office in Serbia, Ministry of Mining and Energy and GovernmentOffice for Reconstruction and FloodRelief of the Republic of Serbia. Project was funded by People of ...
    ... Serbia and surrounding countries in May 2014 (Marjanović and Abol- masov 2015). At the time, disastrous effects were closely followed by media and public and handled by responsible state services, such as Civil Protection offices, and volun- teers, but little has been done after the waters retreated ...

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... compaction and bearing capacity of the earth carcass layers is assessed by the static deformation modulus Ev2, which is determined by the test plate, while the control is performed by the dynamic deformation modulus Evd, which is determined by the light falling load experiment with base plate Ø300 mm. Technical ...
    ... content of fractions smaller than 0.02 mm is determined by linear interpolation [2:38-38]. The material in the transition layer should meet the filter criteria in relation to the underlying layer or to be protected by geotextile filter plastic, defined by the project [2:38-38]. In the zones with water protection ...
    ... STEPGRAD2022 PROCEEDINGS OF INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV homogeneity is ensured (by composition, by granulometric composition and moisture) and in statistically reliable research conditions [1:11-11]. 2.2. REGULATIONS FOR MAIN RAILWAYS ("OFFICIAL ...

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... Dedina on the left side of the path that leads to Gurnja Hill (elevation 389 m). The studied sequence is 110 m thick, and 100 rock samples for microfossils were taken bed by bed along the outcrops (Figs. 2, 3) from the studied layers (GPS coordinates: start of profile: N 44%9'5.39”, E 21"39'44.27"; ...
    ... Remarks and relations. Beriasella subcalisto is characterised by a broad umbilicus that is larger than the height of the whorl. The specimen designated B. subcalisto, illustrated by Le Hegarat (1973, pl. 39, fig. 2), is distinguished by thicker, more densely distributed ribs (according to Hoedemaeker ...
    ... n”. The study Wwas accomplished by a muhltidisciplinary approach involving micropalaeontological, mac- ropalaeontological, magnetostratigraphic and · geochemical methods. The Dedina section yields rich and diverse associations of macrofauna represented by cephalopods (ammonites, aptychi and ...

  • 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

  • Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction

    Velislava Stoykova, Ranka Stanković (2018)

  • Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)

    Liubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić (2020)
    Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, Serbia

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?

    Стефан Петровић, Наталија Батоћанин (2020)
    У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...
    Рудник, Брђани, харцбургити, серпентинити, талк
    ... Serpentinized harzburgites from Brdjani are dominantly built by magnesium-rich serpentine of average composition: [(Mg10.66Fe2+ 1.04)11.70(Fe3+ 0.06Al0.03Si7.94)8.03O5(OH)4]. Serpentine occasionally makes about 80 vol. % of rock. Mesh serpentine, derived after olivine is prevailing over bastite ...
    ... ispitivanja, Beograd DEER, W. A., HOWIE, R. A., ZUSSMAN, J. (1971): Rock-Forming Minerals, vol. 3. Longman William Clowes & Sons Ltd., London, Beccles and Colchester, 270 pp. DEER, W. A., HOWIE, R. A., ZUSSMAN, J. (1972): Rock-Forming Minerals, vol. 5. Longman Lowe and Brydone Ltd., London, 371 ...
    ... THE ALTERATION STYLES IN PERIDOTITES CONTROLLED BY FLUID CHARACTER USING HARZBURGITES FROM RUDNIK AS THE EXAMPLE – SERPENTINIZATION OR TALCIZATION? INTRODUCTION Ultrabasic rocks in the exploited field of the mine Rudnik were accessed by exploration boreholes in 2018. Samples for further ...

  • Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++

    Branislava Šandrih, Ranka Stanković (2020)
    U nauci, industriji i mnogim istraživačkim oblastima, terminologija se brzo razvija. Najčešće, jezik koji je „lingua franca“ za većinu ovih oblasti je engleski. Kao posledica toga, za mnoga polja termini domena su koncipirani na engleskom, a kasnije se prevode na druge jezike. U ovom radu predstavljamo pristup za automatsko izdvajanje dvojezične terminologije za englesko-srpski jezički par koji se oslanja na usaglašeni dvojezični korpus domena, ekstraktor terminologije za ciljni jezik i alat za usklađivanje delova. Ispitujemo performanse metode na domenu ...
    ekstrakcija terminologije, validacija terminologije, GIZA++, grafovi, Unitex, klasifikacija teksta
    ... unrelated to the individual pieces, (3) non-substitutability of synonym words (e.g., by and big), and (4) ambiguity between MWE and non-MWE readings of a substring by and large (e.g., by and large we agree versus he walked by and large tractors passed him). Due to all these difficulties, tackling MWEs represents ...
    ... for each recognised MWU, sep- arated by “;”: graph label (grf04a or grf04b), followed by a label that indicates grammatical number (sin or plu); followed by recognised form (n.INFLECTED p np or n.INFLECTED ng1 ng2) and lemmatised inflective component followed by constant components (n.LEMMA p np or ...
    ... that the first component is noun that inflects, followed by two words that do not inflect. The N4X graph is shown in Figure 1, which shows two paths that recognize two syntactic structures: – N_Prep_Np, noun (1st component that inflects) followed by prepo- sitional phrase (3rd component agrees in case with ...

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... coal needs to be stacked in a large number of layers. The stacker can resolve this by not luffing the boom layer by layer, but by several layers (3-5), while continuing to travel horizontally for each layer. Luffing by several layers will not significantly elevate the stacking point relative to the ...
    ... parameter. The purpose of quality homogenization is expressed by the selection of stacking method and stacking the requisite number of layers. The number of layers, stacking method, size and number of piles in the stockyard are selected by applying standard deviation as a statistical decision-making ...
    ... parameter, and is determined by statistical methods - through standard deviation. When quality is assessed based on lower heating value, the acceptable range for a power plant, as the end user, is considered to be ±500 kJ/kg [Ignjatović et al, 2007, Stevanović et al, 2015]. By observing the standard deviation ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... into the Minex data base: • Checking of all 213 drill holes logs • Checking of all lithological intervals (11298 records), followed by lithological and ply / rock parting coding • Checking sample intervals, individual ply analysis and composite assays (5109 records, average sample length is ...
    ... plies are divided into lower and upper units by clay and sandstone partings (maximum up to 9 sub-seam plies). The individual plies maintain relatively constant thickness over the strike length, while most of the variation takes place in the inner rock parting material mainly clay (Figure 5). ...
    ... thickness and minimum removable parting. The Tamnava West deposit is characterized by geology that is of moderate complexity, both with respect to stratigraphy and structure. The geology was originally defined by earlier work of geologists from Tamnava West mine. The Tamnava West consists of ...

  • 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

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... of keywords annotated by a human (A) and a set of keywords annotated using algorithm (B) divided by the number of keywords annotated using the algorithm: P = A ∩ B B . (1) The recall is calculated as the number of keywords in the intersection of a set of keywords annotated by a human and a set of keywords ...
    ... maximal number of words in rows for each category presented by columns. The first column is related to the numbers of words in the text, the KW count lists the number of keywords given by an author, while KW in the text shows how many keywords given by an author are actually present in the abstract. The difference ...
    ... keywords annotated using the algorithm divided by the number of keywords annotated by a human: R = A ∩ B A . (2) The F1 score is the harmonic mean of precision and recall, calculated as: F1 = 2PR P + R . (3) 3 Textual Resources In this experiment, we have used abstracts from the scientific journal ...