Претрага

Упит dcterms_subject_txt:rock breakage by explosives

1093 items

  • Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje
    ... occupied position X in the reference state. We obtain δu(X, t) by spatial bicubic spline interpolation (similarly as Stanier et al. 2016) as δu is provided on a regular grid by PIV. Fig. 1 shows how the original material frame has been deformed by incremental displacements, and how interpolated displacements ...
    ... tensors (eq. 23) by: U = √ C V = √ B (29) U and V have the same principal values λi, and these are related to the principal values μi of C and B by λi = √ μi . The direction of the principal axes of U and V are however different, due to the rotation of R, see Fig. 4. U and V are computed by polar decomposition ...
    ... tensors (eq. 23) by: U=VC V=vB (29) U and V have the same principal values 4;, and these are related to the principal values 4; of C and B by A; = ,/4;. The direction of the principal axes of U and V are however different, due to the rotation of R, see Fig. 4. U and V are computed by polar decomposition ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... or theory of relativity (PETRovIć & MARKovIć 2010). Milanković’s work was noticed by meteorologist and astronomist interested in geo- physics, Alfred Wegener, and climatologist vladimir Petrovič Köppen. Köppen impressed by calculation of secular thermal change, invited Milanković to con- sider the periods ...
    ... 8. Assumed temperature during the Phanerozoic (FErGUS, 2015), the Cenozoic (bottom left, courtesy by roBErT A. roHdE, Global Warming Art) and in the last 5.5 million years (bottom right, courtesy by roBErT A. roHdE, Global Warming Art). 2006). The Isthmus of Panama and closing of the In- donesian ...
    ... climatologists since it represents the excellent analogue for climate prediction modelling. The PETM is marked by a short (100.000 years) clear drop in value associated with sudden warming and was marked by the high- est temperature during the Cenozoic. Even though, its causes are not clear, some scientists suggest ...

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    ... A u th o r C o p y • (10 μg/L). About 500,000 consumers are affected by drink- ing water containing As above this limit [7]. According to previous research, in Romania about 50,000 people are affected by high concentrations of arsenic in drinking water (0-176 µg/L) [8]. Croatia is also ...
    ... Basin is a continental lowland surround- ed by mountains. It extends over a length of some 600 km in an west-east direction, from the eastern edges of the Alps in Austria and Slovenia to the Carpathian Mountains in Romania. In the south, the basin is bordered by the North Dinarides in Croatia, Bosnia and ...
    ... and Herzegovina, and Serbia, and in the north by the Tatras in Slovakia. The Danube River is also the western boundary toward Croatia, while to the north and northeast the South Pannonian Basin (Vojvodina) is bordered by Serbia’s state frontiers with Hungary and Romania. The surface area of Vojvodina ...

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • First paleomagnetic and magnetic anisotropy results from Montenegrо - the coastal area

    Emö Márton, Vesna Cvetkov, Martin Đaković, Vesna Lesić, Slobodan Radusinović (2021)
    ... magnetic signals.This work was financially supported by the National Development and Innovation Office ofHungary project K 128625, by the Geological Survey of Montenegro and Ministry of Science andEducation of Serbia project No. 176016. Powered by TCPDF (www.tcpdf.org) http://www.tcpdf.org ...
    ... waterCretaceous carbonates, bauxites, Middle Eocene nummulitic limestones, transitional marls, andUpper Eocene flysch. It is thrusted over by the Budva zone characterized by deep water sedimentsof Triassic through Paleogene ages with tuffitic layers in the Ladinian. The uppermost unit is theHigh Karst zone ...
    ... notdefine AMS fabrics, yet most of the localities yielded fairly good paleomagnetic results, whichsuggest pre-folding age of the acquisition followed by a large CW rotation of unit.From the High Karst, only a single Lower Jurassic pelagic limestone provided paleomagnetic results which exhibit CW rotation ...

  • The Rift Sequence Stratigraphy of the Itebej Field (Pannonian Basin, Serbia)

    Saša Ivanišević, Jelena Radišić, Ivana Isić, Dejan Radivojević (2019)
    ... post-rift system tract sediments represented by the Lake Pannon deep-water hemipelagic marls were deposit during the Pannonian sensu lato. The hemipelagic marls deposited in the Srpska Crnja Depression are the main source rock for Itebej field, while the source rock potential of the Badenian sediments is ...
    ... 33 deep wells. Pre-rift stage is represented by deep-water Late Cretaceous turbidites and Late Jurassic ophiolites (ophiolitic mélange) of the Eastern Vardar Zone. The boundary between the syn-rift depositional sequence and pre-rift stage is marked by unconformity at the bottom of Miocene sediments ...
    ... sediments. The rift initiation system tract was confirmed by several wells which drilled coarse siliciclastic sediments of the Early Badenian age. During the Middle Miocene after the early syn-rift stage, a “wide-rift” stage (Tari et al., 1999) marked by marine transgression began. All wells at the Itebej ...

  • Epidotized sanidine in quartzlatites from Grot

    Danica Srećković-Batoćanin, Suzana Erić, Nikola Novičić, Nikola Pašajlić, Natalija Batoćanin (2023)
    Propilitska alteracija je veoma česta u gornjokredno-tercijarnim vulkanitima Srbije. Kvarclatiti Grota, otkriveni na dubini od oko 550 m u jednoj od istražnih bušotina su holokristalaste porfirske strukture sa fenokristalima sanidina dimenzija i do 1,5 x 2 cm. Optičkim ispitivanjima su u kvarclatitu potvrdjeni i elementi sitaste, pojkilitske i glomeroporfirske strukture. Kao fenokristali prisutni su sanidin, plagioklas, kvarc, biotit i amfiboli. Sekundarni minerali su hlorit, epidot, coisit, Fe-hidroksidi, redak kalcit i ilit. U fenokristalima sanidina se zapažaju „lepeze“ izduženih kristala ...
    Grot, kvarc latiti, sanidin, epidot

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... specific receptor.9,14 It also stimulates extracellular matrix invasion by normal and cancer cells.15 In addition, this enzyme is a target protein for triggered liposomal drug delivery to tumor tissues.16 Anti-tumor therapy by transition metal complexes such as cis-platin, carbo- and oxaliplatin has ...
    ... phosphatidylcholines and lysoproducts (Fig. 2). The ruthenium complex is characterised by a couple of peaks from 565 to 573 with a peak at 569.3 having the highest intensity (Fig. 2A). This distribution is caused by the broad natural abundance of different ruthenium isotopes ranging from 96Ru to 104Ru ...
    ... had lost one chloride anion, followed by elimination of two neutral HCl molecules and addition of one more bipyridine ligand. The peak group around m/z = 498.6 corresponded to the sodium adduct of [PtCl4(bipy)] after replacement of one neutral HCl molecule by H2O. Fig. 3 Km (A and C), Vmax (B and ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... (Jelenković et al. 2016). The ore elements are mostly leached from the host rock (andesites and analogue plutonites; magmatic arc above the subduction zone or of the rifts over the subduction zone) in the convectional systems by fluids derived from the subducted oceanic plate and partly dehydrated ...
    ... zones including kaolinitization, decarbonatization of calcareous sedimentary rock and occasionally silicification. The gold mineralization is mostly hosted within a favourable sedimentary package which is underlain by Jurassic and Lower Cretaceous limestones (KLS limestone) and consists predominantly ...
    ... of the earth's crust possess a certain concentration of natural radionuclides, they can be expected to be found in the soil caused by the decomposition of the rock (Popovic and Spasic-Jokic, 2006). The motivation of the present study is to determine the characteristic values of activity conc ...

  • Mafic alkaline metasomatism in the lithosphere underneath East Serbia: Evidence from the study of xenoliths and the host alkali basalts

    Cvetković Vladica, Downes Hilary, Höck Volker, Prelević Dejan, Lazarov Marina (2010)
    Effects of mafic alkaline metasomatism have been investigated by a combined study of the East Serbian mantle xenoliths and their host alkaline rocks. Fertile xenoliths and tiny mineral assemblages found in depleted xenoliths have been investigated. Fertile lithologies are represented by clinopyroxene (cpx)-rich lherzolite and spinel (sp)-rich olivine websterite containing Ti–Al-rich Cr-augite, Fe-rich olivine, Fe–Al-rich orthopyroxene and Al-rich spinel. Depleted xenoliths, which are the predominant lithology in the suite of East Serbian xenoliths, are harzburgite, cpx-poor lherzolite and rare ...

  • Assessing Criteria Weights by the Symmetry Point of Criterion (Novel SPC Method) - Application in the Efficiency Evaluation of the Mineral Deposit Multi-Criteria Partitioning Algorithm

    Zoran Gligorić, Miloš Gligorić, Igor Miljanović, Suzana Lutovac, Aleksandar Milutinović (2023)
    Information about the relative importance of each criterion or the weights of criteria can have a significant influence on the ultimate rank of alternatives. Accordingly, assessing the weights of criteria is a very important task in solving multi-criteria decision-making problems. Three methods are commonly used for assessing the weights of criteria: objective, subjective, and integrated methods. In this study, an objective approach is proposed to assess the weights of criteria, called SPC method (Symmetry Point of Criterion). This point ...
    Вишекритеријумско одлучивање, тежине критеријума, тачка симетрије критеријума, налазиште минерала, алгоритам, процена учинка

  • 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
    ... Zone and the Danubicum. 26th IUGG General Assembly, Prague, Abstracts, IUGG-1324. Lowrie, W. (1990). Identification of feromagnetic minerals in a rock by coercitive and unblocking temperature properties. Geophys- ical Research Letters, 17, 159–162. Marković, B., Pavlović, Z., Terzin, V., Urošević ...
    ... first and the present version of the manuscript. Also, helpful review by an anonymous referee is grate- fully acknowledged. This work was supported by the Ministry of Science and Education of Serbia (Project No. 176016) and by the Hungarian Scientific Research Fund OKTA K105245. References Bodrás ...
    ... suture (Schmid et al. 2008; Cvetković et al. 2016a). As mentioned above, the ancient Gondwana margin that became obducted by the West Vardar ophiolites is repre- sented by the Adriatic microplate. The Cenozoic rotation of this microplate with respect to Africa was in a counter- clockwise (CCW) ...

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2017)
    Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...
    ... document retrieval from the database of geological projects financed by the Republic of Serbia. To that end documents in this large textual database are indexed using simultane- ously two methods: by generating a bag-of-words and by named entity recog- nition for each document. In the next section we ...
    ... dealing with “lignite coal in Tamnava region” by GeoliSS When performing faceted search, the users express their information need by selecting the facets and appropriate keywords, and they can combine any number of facets. Different facets are linked by conjunction, whereas for more than one keyword ...
    ... similarity between information need repre- sented by user query and document representations. The bag of words implies the representation of the document by a set of ungrammatical words—in our case nouns, adjectives, adverbs and acronyms—followed by their frequencies. Thus, the text generated for each ...

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... 2014, 41, 8157–8164. [CrossRef] © 2020 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 (http://creativecommons.org/licenses/by/4.0/). ...
    ... for modeling different processes dominated by uncertainty, multidimensionality, subjectivity and indeterminacy. Optimization criteria were taken into account during model development in order to achieve an optimal selection of artificial lift methods by fuzzy logic application. Optimization criteria ...
    ... Khesht Field. Pet. Sci. Technol. 2014, 32, 1791–1799. [CrossRef] 2. Ghiasi-Freez, J.; Ziaii, M.; Kadkhodaie-Ilkhchi, A.; Honarmand, J. A Reservoir Rock Porosity Estimation through Image Analysis and Fuzzy Logic Techniques. Energy Sources Part A Recovery Util. Environ. Eff. 2014, 36, 1276–1284. [CrossRef] ...

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... affiliations. Copyright: © 2021 by the authors. Li- censee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and con- ditions of the Creative Commons At- tribution (CC BY) license (http://crea- tivecommons.org/licenses/by/4.0/). Energies 2021, 14, ...
    ... turbines. This is particularly supported by the fact that at present, in virtually every country and even in certain administrative units within a given country, there are different normative and legal acts regarding the limitations of acoustic noise emitted by wind turbines. The wind farm noise ...
    ... m and the rotor diameter at 162 m (Vestas V 162/5,6 MW); 3. The permissible noise levels of wind turbines recommended by the World Bank were compared with the values permitted by national regulations [56]; 4. The basic values used in this report to describe noise are in accordance with the conventions ...

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija