Претрага
393 items
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Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes
Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre. "Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes" in Geomorphology, Elsevier BV (2022). https://doi.org/10.1016/j.geomorph.2022.108488
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Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)
Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD... diffraction (CBED) patterns for further insight into the crystal structure and direct microscopic obser- vation of the structural features of the same region. The crystal structure of investigated arsenopyrite is closely related to the orthorhombic marcasite [10] and tetragonal rutile [9]. Our observations ...
... (APB), with the displacement vector R 1/2 [100] and 1/> [010] [10]; we observed such an example with a corresponding, SAED pattern in the thin region of the larger twin-free grain (Figure 5d,d”'). 500 nm 10 221 10 nm 001. — 4\110 57|nm Figure 5. (a,c) Overview TEM micrograph of multiple parallel ...
... with corresponding, FFT pattern, and (d) magnified detail with marked apparent 3.5 A x 5 A superlattice. (e) SAED pattern recorded over the same region, showing satellite reflections around each main diffraction peak. The main SAED pattern is indexed for arsenopyrite, and the additional oxide ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278
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Quantitative landslide risk assessment in the city of Tuzla
In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...... case study of the City of Tuzla in Bosnia and Herzegovina (BiH). The city is well-known for its mining activities, which bring welfare into the region and stimulate urban development. On the other hand, it is also known for rugged, steep terrain, hostile geological environment, underground mining ...
... (especially subsidence), but the actual motivation for a detailed study was the 2014 massive flooding and landslidng event that affected the entire region (Fig. 3). More than 500 mm was precipitated in less than a month and a half, which is more than 6 months’ worth of rainfall in normal conditions ...
... procedure of its aggregation into dummy variables was followed. Distance to mining sites was calculated to depict disturbed zones, since mining in Tuzla region includes open pit coal and underground salt mining. Both mining types can affect stability by causing subsidence (m order of magnitude) or producing ...Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović. "Quantitative landslide risk assessment in the city of Tuzla" in SCG-Xiii International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics and Geotechnical Engineering (2021)
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Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US
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 ...... Global demand for electricity increased by 2.7% [4]. This paper analyzes production and emissions of CO in sector of electricity in two big worlds region - EU-27 and US. The emission of CO> in EU-27 and US in last 30 years are anatomized through paper, also showing trends and targets of future development ...
... the change in the use of energy [1, 2, 4]|. It is noticeable that there is an obvious connection between the level of development of a country or region and the amount of energy consumed in the country. Figure 3 shows the ratio of specific electricity production per capita in the EU-27 and the US ...
... explained Report, last updated: June 6, 2022, available at: https://www.eia.gov/energyexplained/coal/use-of-coal.php [8] European Commission, Coal region in transifion, 2022, available · at: https://energy.ec.europa.eu/topics/oil-gas-and-coal/eu-coal-regions/coal-regions-transition_en [9] Elektroprivreda ...Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić. "Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US" in International Conference on Global Energy and Climate Change - ICGRECC-23, New York, 2023, Research Galery- Science Leagues (2023)
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Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera
Aleksandra B. Kolarski (2016-08-25)Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave... prolaze kroz otpornik R1 ka jonosferi. U regionima vedrog vremena, najveći deo električne otpornosti r je u okviru nekoliko km Zemljine površi. Struje koje u regionima vedrog vremena protiču nadole ka tlu mogu se meriti i njihova gustina je oko 2 pA/m2. U regionu vedrog vremena, mereno na površi Zemlje ...
... “nakovnja”. U realnim uslovima, raspodele naelektrisanja u oblacima su znatno kompleksnije, vrlo često sa postojanjem pozitivno naelektrisanih regiona ispod regiona sa negativnim naelektrisanjem. U literaturi je predloženo više različitih mehanizama naelektrisavanja oblaka kojima se objašnjava struktura ...
... tripol; e) tripol sa IC pražnjenjem između gornjeg pozitivnog i središnjeg negativnog regiona (zelena boja kanala na Slici 1.2.2) i negativnim CG pražnjenjem između središnjeg negativnog i donjeg pozitivnog regiona sa manjom količinom naelektrisanja (plava boja kanala na Slici 1.2.2). ...Aleksandra B. Kolarski. "Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)
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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... unburned carbon in bottom ash on its applicability for road construction. Thermochimica Acta, 498 (2010), 1-6, www.elsevier.com/locate/tca. TOKALIC R., MARINKOVIC S., TRIFUNOVIC P., DEVIC G., ZILDZOVIC S., 2013: Prelimi- nary Examination of the System Fly Ash–Bottom Ash–Flue Gas Desulphurization ...
... 1361–1372, DOI: 10.2298/TSCI130201031S BEATOVIĆ S., KNEŽEVIĆ D., STOJANOVIĆ L., TORBICA S., SEKULIĆ Ž., 2014: Influence of Ash Slurry Preparation on Characteristics of Ash Disposal from the Thermal Power Plant "Gacko". Technics, special edition, Mining, Geology and Metallurgy, vol. LXIX, pp. 35–43 ...
... I., KOSTOVIĆ N., ILIĆ I., 2004: Utilization of fly ash in cement production. Proceedings of the 8th Conference on Environment and Mineral Processing, Part I, Ostrava, Czech Republic, pp. 145–149. KOSTOVIĆ M., SIMOVIĆ I., KOSTOVIĆ N., 2006: Fly ash utilization in cement production – some Serbian ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance
Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović (2017)Neo-Tethys, trench-like basins, synorogenic deposition, evolving thrust belt, Triassic palaeogeography... 2012a; Gawlick & Missoni 2015). Therefore, Late Anisian to early Late Ladinian radiolarites either derive from the distal shelf to continental slope region or the oceanic realm, as also expressed in a characteristic microfacies (e.g., Gawlick & Missoni 2015; Gawlick et al. www.geologicacarpathica ...
... Sudar M., Pćro C., Mello J., Polak M., Ogorelec B. & Buser S. 2011: Jurassic cvolution of thc tectonostratigraphic units of thc Circum-Pannonian Region. Jahrb. Geol. Bundesanst. 151, 281—354. Hsiu K.J. 1968: Principles of mćlanges and their bearing on the Franciscan-Knoxville Paradox: Geol. Soc ...
... and compression of Gondwana and Eurasian units. In: Robertson A.H.F. & Mountrakis D. (Eds.): Tectonic Development ofthe Eastern Medi- terranean Region. Geol. Soc. London Spec. Publ. 260, 155—178. Kober L. 1914: Dic Bewegungsrichtung der alpinen Deckengebirge des Mittelmeeres. Petermann 's Geo ...Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović. "Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance" in Geologica Carpathica (2017)
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Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone
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 ...Emő Márton, Marinko Toljić, Vesna Cvetkov. "Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone" in Journal of Geodynamics, Elsevier BV (2022). https://doi.org/10.1016/j.jog.2021.101880
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Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica
Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and TechnologyNatalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel. "Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica" in International Soil and Water Conservation Research, Elsevier BV (2019). https://doi.org/10.1016/j.iswcr.2018.12.004
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Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava
Boban S. Pavlović (2022)Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošačaBoban S. Pavlović. Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava, Beograd : [B. Pavlović], 2022
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Optimisation of underground mine decline development system using genetic algorithm
... n problem by penalizing the constraints and forming a new objective function as follows (Ali, 2014): ( ) if feasible region ( ) ( ) penalty( ) if feasible region f x x f x x f x x x (12) where 0 if no constraint is violated penalty( ) 1 otherwise x ...Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović. "Optimisation of underground mine decline development system using genetic algorithm" in Underground mining engineering, Beograd : Univerzitet u Beogradu – Rudarsko–geološki fakultet (2014)
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Why classical sequence stratigraphy doesn't work in Pannonian basin?
Dejan Radivojević (2018)... formiran u kontinentalnoj/aluvijalnoj sredini (Prosser, 1993). Iz tih razloga, u slučaju da je proces riftogeneze počeo u trenutku kada je ovaj region već „potopljen“, ovaj sistemski pojas je veoma teško razdvojiti od sistem‐ skog pojasa faze rane maksimalne riftogeneze. Osim sistemskog pojasa početka ...
... n (Juhasz et al., 2007, Sztano et al., 2016, Ivanišević & Radivojević, 2018). The third sequence (P3) is present only in deepest central part of region‐ nal transect, between 63 and 76 km, and 90 and 165 km in Zrenjanin Depression. Reflections which are prograding toward southeast, between 0 and ...Dejan Radivojević. "Why classical sequence stratigraphy doesn't work in Pannonian basin?" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia
The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...Jelka Krušić , Biljana Abolmasov, Miloš Marjanović. "Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia" in Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-60706-7_25
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A necessary and sufficient condition for an algebraic integer to be a Salem number
Dragan Stankov (2019)We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "A necessary and sufficient condition for an algebraic integer to be a Salem number" in Journal de theorie des nombres de Bordeaux (2019). https://doi.org/10.5802/jtnb.1076
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Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement
Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić,. "Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement" in International scientific conference Challenges in Applied Geology and Geophysics: 100th Anniversary of Applied Geology at AGH University of Science and Technology, Book of abstracts, Kraków, Poland, 10-13. Sep. 2019, Kraków, Poland : AGH University of Science and Technology (2019)
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The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin
Filip Anđelković, Dejan Radivojević (2019)... odvijalo u toku velikog vremenskog intervala (otprilike 20 – 5.5 Ma). Sistem panonskog basena obuhvata veći broj subdepresija, pa mogu se izdvojiti regioni različite starosti, razvijeni na podlozi raznih afiniteta, sa različitim debljinama sedimenata. Ovaj rad u fokus stavlja južni deo Panonskog basena ...Filip Anđelković, Dejan Radivojević. "The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin" in Knjiga sažetaka i radova II Kongresa geologa Bosne i Hercegovine, Laktaši BiH, oktobar 2-4, 2019, Udruženje geologa u Bosni i Hercegovini (2019)
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Prognozna ocena resursa kaolinitskih glina u sedimentnim basenima Srbije
Vladimir M. Simić (2003)Kaolinitske gline predstavljaju jednu od privredno najznačajnijih nemetaličnih mineralnih sirovina u Srbiji. Ležišta tih glina odavno se istražuju i eksploatišu u Aranđelovačkom i Kolubarskom basenu i basenima vlašićkog antiklinorijuma. Osim toga, u većem ili manjem obimu istražene su mnoge lokalnosti, a na nekima od njih vršila se povremena eksploatacija. Dosadašnja istraživanja kaolinitskih glina imala su, međutim, prevashodno uzak istraživački cilj - utvrđivanje rezervi glina određenog ležišta, dok su istraživanja regionalnog karaktera bila malog obima i vezana za delove pojedinih ...prognozna ocena, resursi kaolinitskih glina, sedimentni baseni, Srbija, geologija, mineralogija, kvalitet, potencijalnostVladimir M. Simić. Prognozna ocena resursa kaolinitskih glina u sedimentnim basenima Srbije, Beograd : V. Simić, 2003
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Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems
Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević. "Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems" in Physical Review E, American Physical Society (APS) (2019). https://doi.org/10.1103/PhysRevE.100.032113
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Numerical modeling of Selanac debris flow propagation using SPH code
The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...... results of eroded material was also taken into account. 2 CASE STUDY The Selanac debris flow was activated after the Cyclone Tamara hit Balkan region, including the Republic of Serbia, in May 2014. It caused severe floods, flash floods and landslides throughout the affected areas. Continuous and ...
... numerical modelling of debris flows in RAMMS - Selanac case study’’, Proceeding of the 4th Regional Symposium on Landslides in the Adriatic - Balkan Region, ReSyLAB, Sarajevo.1: 163-167. Legros, F. (2002). ‘’The mobility of long-runout landslides’’. Eng Geol 63:301–331. Liu, G.R. and Liu, M.B. (2003) ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
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New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"
Saša Ivanišević, Dejan Radivojević (2018)геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија... sedimentary sequence in the Battonya‐Pusztafoldvar region, SE Hungary. Foldtani Kozlony 133, 521–540 (in Hungarian with English abstract). Radivojević, D., 2014, Regional geological characteristic of Miocene sediments in northern Banat region, PhD thesis, University of Belgrade ‐ Faculty of Mi ...Saša Ivanišević, Dejan Radivojević. "New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)