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Упит dcterms_creator_txt:Ş. Can Genç

637 items

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... data are available, the following empiri- cal relationship to calculate the cutting resistance can be used: KA = σc/10 = fpr (MPa) (2) This relationship is subjected to the large variations, and it can only be taken as a rough guide value. 5.2. Wedge Test Method The cutting resistance of rocks is ...
    ... (confining) pressure can be provided during the tests. As mentioned before, the basic methodology for determining the cutting resistance includes two laboratory tests: uniaxial compressive strength tests and the wedge test method. This means that the modified methodology provides tests that can be used to report ...
    ... laboratory methods are available to determine the cutting resistance of the material in the seams of surface mines. Nevertheless, the cutting resistance can only be determined by laboratory tests carried out on the drilling core samples or block-shaped rock material samples. The results of laboratory testing ...

  • Using English Baits to Catch Serbian Multi-Word Terminology

    Cvetana Krstev, Branislava Šandrih, Ranka Stanković (2018)
    In this paper we present the first results in bilingual terminology extraction. The hypothesis of our approach is that if for a source language domain terminology exists as well as a domain aligned corpus for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a ...
    aligned texts, word alignment, terminology extraction, electronic dictionaries, morphological inflection
    ... n toolkit can be found at https://github.com/moses-smt/giza-pp 13How phrase translation probabilities are determined can be read in more details at http://www.statmt.org/moses/ ?n=FactoredTraining.ScorePhrases 14More about Natural Language Toolkit for Python and its WordNet interface can be found at ...
    ... ng terminol- ogy. The work presented in this paper is motivated by our belief that Natural Language Processing (NLP) resources, meth- ods and tools can help in the development of terminology in the Serbian language. Our work relies on the following presuppositions: 1. Serbian terminology is today t ...
    ... possible (Ranka Stankovic, Cvetana Krstev, 2016). In this research, 20 syntactic structures grouped in 12 classes6 for extraction purposes were used, which can extract the most frequent syntactic structures identified by an analysis of several Serbian terminological dictionaries and Serbian e-dictionary of MWEs ...

  • A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area

    Filip Anđelković, Dejan Radivojević (2018)
    baden, Beograd, facije, facijalna raznovrsnost, sedimenti
    ... its facial diversity, the Belgrade area can be considered as a second type  locality of  the Badenian stage. The original type locality is the Vienna basin (Anđelković M., 1987).   In the place of strictly delimited facies and subfacies, some transitional forms can be described,  with lithological an ...
    ... in  the  area  of Višnjica  and  Slanci.  Cerithium  limestones  are  also  exposed  in  this  area  (on  the  Lipak  hill).  Transitional  subfacies  can  be  observed in this area, which sometimes also include the sandy component.  Rakovica clastic sediments  include well‐cemented conglomerates and  ...

  • Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta

    Aleksandar Pačevski (2022)
    ... is only a slightly misdirected, wrong interpretations and conclusions are obtained which can be very harmful to the research itself. Proper use of the up-to-date microprobe methods in the mineral studies can be achieved only by their combining and upgrading on the basic investigations by polarized ...
    ... defined, such as exsolutions, replacements, etc, which have significantly contributed to the understanding of origin of minerals and ore formation. It can be said that ore microscopy, as a separate discipline of the polarized light microcopy, reached its peak in the middle and second half of the XX century ...

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the ...

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis

    Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović (2019)
    ... and МРТ 1 which contain unsubstituted aromatics (fluorene, phenanthrene) in the denominator do not show clear trends from Pyr400 to Pyr500. This can be attributed to the preferable release ог unsubstituted aromatics fluorene (Е) and phenanthrene compared (0 that of their methylated counterparts, ...
    ... also has similar values in lignite extracts апа pyrolysates. Тенатефушарћћајепез show more negative 515C values than садајепе and phenanthrene which can be attrbuted to their possible formatton from non-hopanoid triterpenoids which are enriched in С than diterpenoids (Bechtel ег al.. 2008). Negligible ...

  • Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia

    Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Jovanović (2018)
    ... well defined. Although, they arc somewhatscattered, the overall-meandirections for both groupsare statistically well defined. The conclusions which can be drawn out from ourresults are that the overall-mean directions and their statistical errors for the Late Cretaceous sedimentlocalities and Oligo ...
    ... rotated in the last 20 Ma in the counterclockwise sense (Marton 2006; Matton et al., 2011; Marton et al., 2017). Both of these vertical-axis rotations can be responsible for the large-scale extension in the southern Pannonianbasin. Acknowledgement: This work was supported by the Ministry of Science and ...

  • Upper Cretaceous scaglia type limestone from Klepa Mts. (North Macedonia) - sedimentology and biostratigraphy

    Violeta Gajić, Milena Dunčić, Ana Mladenović, Dejan Prelević (2024)
    The research area is located in the central part of North Macedonia, in the area of the Klepa Mts. Based on sedimentological, micropaleontological and biostratigraphical investigations of samples from both the east and west side of the Klepa Mts., sedimentary rocks of the Upper Creaceous age are determined. During the latest Cretaceous, this area was dominated by the sedimentation of dominantly carbonate rocks with variable amounts of clastic components. From the tectonic point of view, investigated area belongs to the ...

  • Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7

    Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković (2019)
    Part of E-80 highway that passes through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. The route is designed through a typical plain and hilly terrain in which different geological units are dominant: crystalline schists, neogene sediments of foothills and quaternary sediments in the valley ...
    ... construction. Category B includes terrains that can be conditionally stable in inadequate performing of construction works (high slopes, portals and approach cuttings of tunnels). These are terrains in which maximal groundwater level is 2 m, landslides can be activated and smaller rock falls (weathering ...
    ... smaller distribution (al, pr, t1, t2). In small streams there is a mixture of sands, gravel and rarely clays that are often muddy and saturated, but can be well drained. River-terraced plateaus are outside the influence of the Toplica River flow and they are completely stable. On this section, deluvial- ...
    ... and primary alternation of rock mass as well as variable physical-mechanical properties. In these terrains, temporary reduction of safety factor can be caused by short-term and temporarily events. Category C includes terrains that are potentially unstable to unstable on slopes, terrains in ...

  • 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
    ... (depending on the expertise of the examiner) can have a number of negative consequences, some of which are listed. This should be especially kept in mind when building high-speed railways (with speeds higher than 200 km/h) because here the consequences can be much greater. In order to speed up the testing ...
    ... together with the required values of the modulus of deformation Ev2. Determining the correlation coefficient between the deformation modulus Ev2 and Evd can be applied in special cases when soil 602 STEPGRAD2022 PROCEEDINGS OF INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION ...
    ... of coarse-grained gravel or sandy material and together with the protective layer forms frost protection [3:4-5]. Clay materials and materials that can be compacted and consolidated cannot be installed in the transition layer. The surface of the transition layer meets the conditions: transverse slope ...

  • 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

  • Uticaj geološke neizvesnosti u razvoju rudarskih projekata

    Petar Marković, Dejan Stevanović, Mirjana Banković (2023)
    Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...
    ... nature and specificity. Uncertainty in mining can come from different sources and affect different aspects of mining projects. Geological uncertainty stands out as one of the dominant factors. Geological uncertainty plays a key role in mining and can significantly affect resource and reserve estimation ...
    ... planning, economic profitability and risk management. This uncertainty cannot be eliminated, but with the application of adequate standards and laws, it can be reduced. Through this paper, the differences in regional and foreign practice from the aspect of categorization of resources and reserves, as well ...

  • Primena digitalne fotogrametrije u rudniku Rudnik

    Nikola Mirković, Luka Crnogorac, Katarina Urošević (2023)
    Digitalna fotogrametrija, lasersko skeniranje i virtuelizacija sve više pronalaze aktivne uloge u rudarstvu, prvenstveno zbog svoje široke mogućnosti primene. Laserskim skeniranjem i fotogrametrijom snimaju se i kreiraju 3D modeli otkopa, jamskih hodnika, površinskih kopova, površinskih objekata (zgrada, spomenika, predmeta), a vrši se skeniranje celih rudnika koji se rekonstruišu u 3D digitalne modele. Fotogrametrija predstavlja proces fotografisanja objekata pomoću fotoaparata i daljom obradom fotografija u različitim softverskim alatima kreiraju se realne kopije 3D modela objekata ili predmeta u digitalnoj formi. Za ...
    digitalna fotogrametrija, prostorna vizuelizacija, rudarski objekti, podzemna eksploatacija
    ... high-quality 3D models, it is necessary to provide top-quality laser scanners, as well as supporting computer equipment (hardware and software) that can quickly process a huge amount of data and form high density point clouds. The acquisition of such equipment represents a relatively high financial ...
    ... - Rudarsko-geološki fakultet, e-mail: katarina.urosevic'rpf.bg.ac.rs 109 financial investments of the company), 3D models of underground spaces can be obtained that are at a satisfactory level for the needs of geological mapping in the mine, insight of management and engineers into the state of ...
    ... spaces and quality assessment of performed mining works. In addition to the above, the developed 3D models of underground spaces and mechanization can be used for educational purposes, as an aid during the training of high school and university students and new employees in the mine and for the needs ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... following is found: v R vn (7) If the derivative v' at some point Rc could not be found then from the equation (7), n can be determined. Value of deriva- tive v' can be determined using one of the formulas for numerical differentiation. For this purpose the Stirling’s formula is fre- quently ...
    ... calculated ones, it can be seen that they are approximately the same. On the basis of obtained values of curveline de- pendency coefficients and the values of line- ar correlation coefficients between the re- duced distance logarithm and the oscillation velocity logarithm, it can be concluded that ...
    ... usual model - the least squares method, one more model is shown with the use of La- grange's theorem. Thereby, it has been stated that both models can be used to calculate the oscillation velocity of the rock mass. Keywords: working environment, blasting, seismic effect, oscillation velocity, soil ...

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... properties of the stone itself, creating stresses that accumulate within stonework over time. Therefore, the rate of decay and weathering effects can vary considerably, and direct causal connection is not easy to define. Precise problem diagnosis is a first and crucial step in order to adequately ...
    ... emphasizes the proportion of higher damage categories (Fitzner and Heinrichs 2002). • Patterns _ of damage indices help evaluate damage processes and can lead to better understanding under- lying causes. • Zonation of weathering forms is indicative for certain intensity and type of weathering processes ...
    ... those parts of a monument Which interventions have to focus on. • The consequent use of weathering forms, damage categories and damage indices can be a very suitable strategy for controlling conservation measures and for regular re-evaluation of monuments in the framework of long-term survey ...

  • Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems

    Dejan Ćebić, Nebojša M. Ralević (2021)
    нелинеарне једначине, поступци засновани на срединама, вишеструки корени,

  • Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia

    Pavle Tančić, Aleksandar Kremenović (2022)
    Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42 Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by com parative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R63c space group. Various polyhedral distortions and structural or derdis or dervariations between the zones studied are also described and discussed. The ...
    Geology

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... mining expenses. Dozers are the most commonly used machines. Choosing the adequate dozer of the right type and manufacturer is of great importance and can be made easier by carrying out an analysis of the existent operational-exploitative parameters. In this paper, the method of grading the operational ...
    ... mining expenses. Dozers are the most commonly used machines. Choosing the adequate dozer of the right type and manufacturer is of great importance and can be made easier by carrying out an analysis of the existent operational-exploitative parameters. In this paper, the method of grading the operational ...
    ... decision about the purchase of the machines should be right and unbiased, so as to avoid any unwanted future loses [1]. The decision about the purchase can be made in a few different ways, and it is certainly the most reliable if it is made after an adequate data analysis with the support of the appropriate ...

  • Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process

    Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)
    Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...
    DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker
    ... below 4, it can be concluded that PIN degradation occurs via h*. A photocatalytic study of a mixture of NAD, MET, and PIN, as they occur in nature, shows that the degradation processes for MET and NAD were accelerated compared to individual solutions of these tvo compounds. This can be explained ...
    ... case of the V)Os. Namely, it was demonstrated that the bandgap value can be efficiently tuned, either by manipulating, the structure of V»Os or by applying an external stimulus. It has been reported that the band gap of V>Os can either be decreased or increased, depending on the selected technique ...
    ... line denotes the Fermi level. The black line connects the top of the valence and the bottom of the conduction zones. As presented in Figure 7, it can be seen that the DFT calculations lead to excellent matching between experimental and computational results. Our DFT calculations indicate that an ...