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Упит dcterms_subject_txt:Tunneling in hard rock

1969 items

  • OER obrazovni sadržaji kao spona između akademskog i preduzetničkog znanja

    Ivan Obradović, Ranka Stanković, Marija Radojičić (2014)
    ... http://dukespace.lib.duke.edu/dspace/bitstream/handle/10161/6216/Duke_Bioelectricity_MOOC_Fall201 [16] J. R. Young. What professors can learn from ‘hard core’ MOOC students.Chronicle of Higher Education, 59(37), 2013, A4. [17] D. Wiley. Open source, openness, end higher education. Innovative Journal ...
    ... Opening up for OpenLearn: issues in providing open educational resources. In Proceedings of CAL07: Development, disruption and debate – D3, 2007, Dublin, Ireland. [8] A. Margaryan, M. Bianco, A. Littlejohn. Instructional quality of Massive Open Online Courses (MOOCs). In: Computers & Education 80, ...
    ... ER). In: theCommonwealth of Learning, 2011. [2] C.J. Bonk. The world is open: How web technology is revolutionizing education,Wiley, 2009. [3] D. Millard, K. Borthwhick, Y. Howard, P. McSweeny, C. Hargood. The HumBox:Changing educational practice around a learning resource repository. In: Computers ...

  • Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US

    Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić (2023)
    Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...
    CO2, емисија, угаљ, термоелектрана, САД, ЕУ-27
    ... characteristic years. Coal consumption in US peaked in 2005, but the total annual coal consumption in tons peaked in 2007 with 948,2 million tons of coal consumed in electric power sector [7]. Coal consumption declined since then, mainly because of a decline in the use of coal for electricity generation ...
    ... Coal production in EU-27 and US At one time, coal had the greatest importance in the EU-27 countries as an energy source for obtaining electricity. In 1990, the share of coal in the production of electricity was 36,7%, while in 2021 this share was only 14,8% [4]. Nevertheless, even in the third decade ...
    ... 06 The total CO» emission in the EU-27 and the US is given in Table 3, while the comparative CO» emission in the largest power plants in Europe and US for the period 2010-2021, with projections till 2050, are shown in Figure 7. 2 The Nikola Tesla power plant is in Serbia, which is not a member ...

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... features of the main rock-forming minerals, we estimate that the primary metamorphic event that affected the Northern Serbo-Macedonian Subunit was in the amphibo- lite facies at temperatures of 500–550 °C and pressure of 0.5–0.7 GPa, with a potential retrograde overprint, presu- mably in greenschist facies ...
    ... Tectonophysics 410, 337–365. https:// doi.org/10.1016%2Fj.tecto.2004.12.038 Iancu V., Berza T., Seghedi A. & Marunţiu M. 2005b: Paleozoic rock assemblages incorporated in the South Carpathian Alpine thrust belt (Romania and Serbia): a review. Geologica Belgica 8, 48–68. Kilias A., Falalakis G. & Mountrakis ...
    ... slight scattering around this value (SG-F in Fig. 3). Stretching lineation in the Supragetic Unit is very similar to those in the Serbo-Macedonian with trend/ plunge maximum in LSGA 020/17° and sub-maximum in LSGB 025/37° indicating local perturbations (SG-L in Fig. 3). Outcrop-scale deformations The ...

  • An Efficient Class of Iterative Root-Finding Methods with Applications

    Dejan Ćebić, Nebojša Ralević (2021)

  • Towards translation of educational resources using GIZA++

    Ivan Obradović, Dalibor Vorkapić, Ranka Stanković, Nikola Vulović, Miladin Kotorčević (2016)
    ... for user interface in five languages is available, but the long- term goal is to have platform localized to global audiences. Students can log in to Coursera and check options for type of language support with information about translation offerings in the coming months. In this phase, course lectures ...
    ... German, Italian, Portuguese, Greek, Dutch, Czech, Bulgarian, Croatian, Polish, Russian, Chinese, which constitute strong use-cases, many of them hard to translate into and with relatively weak machine translation (MT) support. Phrase-based and syntax-based SMT models are developed to address language ...
    ... platform and on the VideoLectures.NET digital video lecture library. The translation engine employed in TraMOOC is Moses [5], the most widely used SMT toolkit available in academia as well as in commercial environments, mainly due to its flexibility, modularity, open-source licence, and competitive ...

  • 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

  • Application of ERT in the study of debris-flow source area: Case study Selanac debris flow

    Dragana Đurić, Jelka Krušić, Biljana Abolmasov (2021)

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... directly observed in the study area. However, the proximity of amphibolite facies gneisses of Lower Complex and green- schist facies rocks of Vlasina Unit in the hanging wall of the Vrvi Kobila shear zone, and relative structural concord- ance of foliation S, in both rock types suggest that ...
    ... Hf-Zircon and Sr whole rock isotope studies. In: Proceedings of Bulgarian Geological Society, Sofia, pp 89-—91 Zidarov N, Peytcheva I, von Quadt A et al (2004) Timing and magma sources of Igralishte Pluton (SW Bulgaria): preliminary iso- tope-geochronological and geochemical data. In: Proceedings ...
    ... recon- struction of the evolution of tectonic units in south-eastern Europe. The central parts of the SMM (south-eastern Ser- bia) were chosen for this study due to relative scarcity of reliable data and relatively good condition of rock expo- sures. This study provides new 3detailed structural ...

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... replace the host-rock. In | cast of the Okoška Gora mineralization, silica-chalcedony rhythmically bandedsinte: reported (Mihael Ravnjak, verbal comm.), howeverit is not clear whether they re breccia infill or paleosurface deposition. The mineralized stockworks contain таг quartz, often in the form of sceptre ...
    ... inclusions in sphalerite and quartz from five samples of ore were investigated in this study. Both types of quartz form well-developed euhedral c whereas sphalerite forms euhedralcrystals or fills the open spaces between pre-existi and gangue minerals. Sphalerite is honey yellow or dark brown in color and ...
    ... ofthe crystal shape. Inclusions in both assemblages are generally two-phase, rarely iree-phase, the latter containing unknown transparent solids, which are probably not salt rystals. Two types of inclusion assemblages have been identified in sphalerite (Fig. 1). nclusions in the first assemblage (S2) occur ...

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... calcimetre by Eijkelkamp, which Works in accordance with the method of Schcibler. The ana- lysis of CaCOy3 content was conducted at the Institute of Geo- logical Sciences of the Jagiellonian University in Krakow. FACIES On the basis of lithology, rock colour, fabric and car- bonate content ...
    ... comparison with other sections in northern Albania. O/io/ifi, 21: 71—76. Marshall, J. D., 1992. Climatic and oceanographic isotopic signals from the carbonate rock record and their preservation. Geo- logical Magazine, 129: 143—160. Michalik, J., 2007. Sedimentary rock record and microfacies indi- ...
    ... 636' calpionellid biostratigraphic scheme, proposed by Rehakova (2002), were adopted. The rock samples and the thin sections are stored at the Institute of Geological Scicnces, Jagiellonian University in Krakow. For the radiolarian analyses, 61 samples were collected from different lithologies ...

  • Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta

    Aleksandar Pačevski (2022)
    ... determination: trends and achievements Miloš Marjanović, Analiza odrona u stenskim kosinama: savremeni pristupi Miloš Marjanović, Rockfalls analysis in rock slopes: state-of-the-art approaches Aleksandar Pačevski, Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta Aleksandar ...
    ... its peak in the middle and second half of the XX century, where the contribution of Paul Ramdohr (1890-1985) to this development should certainly be emphasized. In last decades, the development of many sophisticated methods of microprobe analysis (in-situ) has enabled a further shift in the study ...
    ... it was found that only copper is structurally bound in this mineral, while other impurities (Pb, As and Ag) form finely dispersed nanometer grains of other minerals which were actually subsequently deposited filling the nano-pores in pyrite. In this way, copper-bearing pyrite is well defined and ...

  • An aproach to Implementation of blended learning in a university setting

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović (2011)
    ... server with an Intel® Core™2 Quad Processor @2.33Ghz, 4GB working memory and a 500GB hard disk in RAID 1 regime, whereas the operating system platform is Fedora Core 13 (kernel version 2.6.33.3). The bottleneck in the application of this system is the amount of RAM memory. Although, as a general ...
    ... considerably bigger than in the third and fourth year. 3. THE LEAP FORWARD: MOODLE AT FMG The introduction of Moodle at FMG represented a leap forward in the blended learning system. In 2009, a number of teachers and teaching assistants started expressing their interest in functionalities that ...
    ... al resources In the instruction of modern technologies, GIS no doubt being among them, one is very often encountered with the problem of terminology, namely of adequate translations of terms into Serbian. In order to help students in reading scientific articles and texts in English, and finding ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија

    Весна Лесић, Емо Мартон, Драган Лукић, Весна Цветков (2018)
    ... magnetic data. Geophy‐ sical Journal of the Royal Astronomical Society, 62, 699–718.  Lowrie, W., 1990. Identification of feromagnetic minerals in a rock by coercitive and unblocking tempe‐ rature properties. Geophys. Res. Lett., 17, 159–162.  Luković, A.,  Zavašnik,  J., Vulić,  P., Banješević, M ...
    ... s and sandstones    in Upper Campanian‐ Maastrichtian. The volcanic activity  in the area started  in Upper Turonian and ended  in Upper Campa‐ 750  nian.  Durring  this  period  the  volcanic  activity  produced  various  calk‐alkaline  volcanic  and  intrusive  facies.  In this paper we are p ...
    ... together  133  independently  oriented  samples were collected. The samples were oriented in situ with the magnetic and/or sun compass. The  principal aim was  to  find out  if  the studied area was  involved  in a  large scale displacement during or  after the time covered by the samples.     METHODS  ...

  • English for Geology Students. 1

    Lidija Beko (2023)
    Engleski jezik
    ... formations have been discovered by miners in the Naica Mine in Mexico. The first to be explored was the Cave of Swords, which was discovered in 1910 and contains selenite or gypsum (CaS0,·2H,0) crystalline formations averaging about 1m (3 feet) long. Drilling work in 2000 opened the Cave of the Crystals ...
    ... Geomagnetician............... 116 Geology Mystery Files ... a 117 Geology through Myths.............c. 120 Table of contents • Unit5 • ROCK CYCLE, IGNEOUS ROCKS AND VOLCANOES Partl ROCKCYCLE........ ttt tttv 126 Vocabulary....n.MOORe. ... o - W ... .. NEO 128 Reading Comprehension. ...
    ... GEOLOGY STUDENTS || LJ Copyright e 2023 Lidija Beko. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise without the prior written permission ...

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

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

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

  • The Newton method for solving nonlinear equations based on aggregation operators

    Nebojša M. Ralević, Dejan Ćebić (2019)

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija