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Упит dcterms_subject_txt:Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry

2352 items

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    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 ...
    debris flow, modelling, SPH code, DEM
    ... c)- dynamical or numerical (Savage and Hutter, 1989; Hungr, 1995; Iverson, 1997; Takahashi, 2007; Wu, 2015). Physical models are progressing nowadays and giving a wide range of possibilities. Some of the available approaches treat the heterogeneous and multiphase moving mass as a single-phase continuum ...
    ... motion of solid and fluid phase. Different mechanisms, rheological and numerical models are used in this area of research. Generally, there are mainly two groups of models used for modeling on flow type landslides: empirical-statistical (Rickenmann, 1999, Legros, 2002), or physical (deterministic)- ...
    ... Location of case study B) geometry and main parts 3 METHOD SPH (Smoothed Particle Hydrodynamics) was firstly proposed by Lucy (1977) and Gingold and Monaghan (1977) and applied in astrophysical modeling. In time, it became widely used in different fields (Liu and Liu 2010; Chen et al. 1996; Huang ...

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction
    ... during, one hydrological year (summer and autumn 2015, winter and spring, 2016, basic physical and chemical characteristics and ionic composition of water), Sustainability 2023, 15, 11146 6of14 as well as determining the content of stable isotopes H, 18O, and !C, also on a quarterly basis. Stable ...
    ... system was reviewed and analyzed and conclusions were made related to the genesis of the karst groundwater and its circulation conditions. 2. Materials and Methods The Krupaja system represents one of the most complex karst systems within the Beljanica karst massif, and as such, it is of gr ...
    ... Creation of Physical Model of Karstic Aquifer on Example of Beljanica mt. (Eastern Serbia). Ph.D. Thesis, FMG, University of Belgrade, Belgrade, Serbia, 2010. 8. · Langmuir,D. Physical and chemical characteristics of carbonate water. In Guide fo the Hydrology of Carbonate Rocks; IHP Studies and Reports ...

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... (kg/s, for water the same as l/s); and ∆T denotes the temperature difference between the entering water and the leaving water. Geothermal systems on the both sites perform heating operations and must be able to cover the maximum thermal load demands. The physical and chemical characteristics have been ...
    ... or no infrastructure. 2. Materials and Methods This paper shows two sites where geothermal resources were formed within different types of reservoirs, as well as with different temperatures and diverse chemical compo- sitions. According to the features of these resources and spatial-urban conditions ...
    ... green areas and water features. Under favourable weather conditions, the glazed façade of the long corridor can be open along the intermediate semi-atrium spaces. Thermal mass and materials: The modules are designed as lightweight structures where a low thermal mass optimizes comfort and energy efficiency ...

  • Uticaj utiskivanja gas-lift gasa na prenos mase i toplote

    Branko Grubač (2019)
    Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... (2005) [97] M. Jorda, Paraffin deposition and prevention in oil wells, Society of Petroleum Engineers, SPE paper, str 1605-1612, (1966) [98] Z. Huang, S. Zheng, S. Fogler, Wax deposition experimental characterizations, theoretical modeling, and field practices, Taylor & Francis Group, CRC Press ...
    ... Technology, Vol. 25, str 607-617, (1973) [73] A. Dukler, M. Hubbard, A model for gas-liquid slug flow in horizontal and near horizontal tubes, Industrial & Engineering Chemistry Fundamentals, Vol. 14, str 337-347, (1975) [74] D. Viswanath, Viscosity of liquids, Springer, (2006) [75] H. Zhang ...
    ... predicting wax precipitation and deposition, Society of Petroleum Engineers, SPE paper, str 121-126, (1988) [96] W. Ming, Q. Shujuan, L. Jianfeng, Z. Ling, Prediction model based on the theory for tackling wax deposition in oil pipelines, Journal of natural gas chemistry, Vol. 14, str 243-247, (2005) ...

  • Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia

    Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović (2024)
    lokalni putevi, prirodni hazardi, otpornost na klimatske promene, MaPLoRds

  • Numerical modelling of the roughly simultaneous emplacement of two distinct ophiolite belts

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije

    Jelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar (2023)
    Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...
    mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacija

  • Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji

    Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković (2023)
    U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...
    površinska eksploatacija ugalja, lignit, Kolubara, Kostolac, Srbija

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... the quality and accuracy of the input thematic data and particularly to the landslide inventory used to train the model, (2) the absence of expert opinion which may result in a satisfactory statistical output in terms of degree of fit, but may not be realistic in terms of physical meaning, (3) the ...
    ... regional scale is suggested grid cell size of 100x100m) gives its Total Landslide Susceptibility Rating (TLSR). The maximum possible theoretical value of the TLSR is 10.0 and the minimum possible value is 0.3. The following relationship is adopted: TLSR100-500 = LT-R + SI-R + AP-R + EI-R + LU-R (1) Where: ...
    ... landslides were defined as translational and rotational debris and earth slides and rock falls. Over 60% of the occurrences have been defined as intermediate and deep, and those mostly occurred in debris material overlying hard rock masses or in fluvioglacial and proluvial sediments. The depth of some ...

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... Maps as underlying: Physical, Streets, Hybrid or Satellite, depending on user choice. Over the base map two layers are displayed: polygons singled with remote sensing method and polygons resulting from the analysis of exploitation authorizations, requests for recultivation and field visits. ...
    ... Vojvodina and accompanying database" was realized by University of Belgrade, Faculty of Mining and Geology for Vojvodina Provincial Secretariat for Energy and Mineral Resources. The aim was to secure safe and reliable data needed for recultivation of all abandoned mines in national parks and other ...
    ... for management of exploration and exploitation permits and works in the mineral resources field. GeolIEP represents a basis for archiving and efficient handling of vector, raster and related thematic alphanumeric content in one place, as well as efficient management and usage of mineral resources ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and mechanical properties of limestone in the deposit are spatially very uneven (Trajković et al. 2013). By examination of physical and mechanical properties of the working environment, the ...
    ... operations, the potential energy of explosive materials is transformed into a mechanical work. That energy, in the vicinity of blasting location, destructs and crushes rock mass, a bit further creates cracks and permanent deformations in the rock mass, and even further it is being transformed into elastic ...
    ... the purpose of deposit exploitation (Trajković & Lutovac, 2006). Three blasting operations were performed. Balkanit 60/1000 and Videksil 65/2000 are used as explosive materials. The activation of explosives in boreholes was performed using detonating fuse C-12, while initiating of detonating fuse was ...

  • 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)
    ... Lutovac S,. (2005): Technique of Blasting and Eartquakes, Faculty of Mining and Geology, Belgrade, pp. 199. [3] Simeunović D,.(1985): Mathematics, Faculty of Mining and Geology – Mining Department, Belgrade pp. 102- 103. [4] Ivanović B., (1973): Theoretical Statistics, Naučna knjiga, Belgrade, ...
    ... influence the process of exploration and exploitation, were noted in the deposit. Only after blasting, blocks of rocks 0.50 m3 occur, which could be attributed to the effect of small faults and carstified cracks in the de- posit. By examination the physical and me- chanical properties of the working ...
    ... THE “KOVILOVAČA“ OPEN PIT** Abstract Large scale mining as a method of extraction of mineral raw materials have a growing application with the aim to increase the quantity of blasted mass, and to reduce costs of production as well. Increas- ing the quantity of blasted mass requires the use of ...

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... resources are shared in both physical and virtual communities, where more and more are published as Open Educational Resources (OER). Nowadays, online searches for educational materials are conducted more often than a few years ago. Although Internet searches are easy and speedy, they are not always ...
    ... educational materials makes them more easily discoverable through online searching [1]. Descriptors defined in LRMI include: physical attributes, pedagogical relevance and instructional strategies. Retrieval of resources on basis of the way the learner will be engaged supports differentiated ...
    ... conclusions, followed by expectation of benefit and future implementation plans. 2. THE BAEKTEL OER FRAMEWORK The main goal of the BAEKTEL project is building an OER network for publishing educational materials by higher education (HE) institutions and best practice examples by enterprise experts ...

  • High-resolution sequence stratigraphy of carbonates - theory and examples

    Jelena Stefanović, Dejan Radivojević (2020)
    Циљ рада је да кроз теоријски аспект и примере примене представи секвенциону стратиграфију високе резолуције карбонатних седимената. У том смислу први део се односи на појам и значење високе резолуције у секвенционој стратиграфији. Од временских и просторних скала које одговарају сеизмичким профилима у последњих двадесет година метода је нашла примену на скалама које одговарају бушотинским подацима или изданцима. Као најпогоднији седименти за овај тип истраживања су се показали карбонати јер су осетљиви на еустатичке промене, а основе секвенционе стратиграфије ...
    изданак, системска група, јура-креда, карбонатна платформа, плитководна средина
    ... high-resolution carbonate sequence stratigraphy through theoretical aspects and examples of its application. In that sense, the first part of the paper is related to concept and meaning of high-resolution sequence stratigraphy. From temporal and spatial scale corresponding to seismic profiles in last ...
    ... W. and ALLEN, G.P., 1999. Siliciclastic sequence stratigraphy: concepts and applications. Concepts in sedimentology and Paleontology, vol. 7. Society of Economic Paleontologists and Mineralogists (SEPM). 210. READ, J.F. 1995. Overview of carbonate platform sequences, cycle stratigraphy and reservoirs ...
    ... changes. In Serbia and neighboring countries, Mesozoic age carbonate platform sediments can be found in the orogenic belts of the Carpatho-Balkanids and Dinarides. Sequence stratigraphy research of these sediments in our area would enable regional and local correlations and could serve for pal ...

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... Krivelj Open Pit we performed experimental investigations on copper ore [7]. The basic physical and mechanical properties of the rock mass were determined on samples in the laboratory. By examining the physical and mechanical properties of the work environment, the following values were obtained: ‚ ...
    ... influence the process of exploration and exploitation, were noted in the deposit. Only after blasting do blocks of rock of 0.50 m3 occur, which could be attributed to the effect of small faults and karstified cracks in the deposit. By examination of physical and mechanical properties of the working ...
    ... explosive amount, and conditions of blasting and geologic characteristics of the soil; all of this being determined on the basis of test blasting for the specific work environment. In the Sadovskii equation two parameters, K and n appear and they are conditioned both by rock mass characteristics and blasting ...

  • Back-arc underplating provided crustal accretion affecting topography and sedimentation in the Adria microplate

    Paolo Mancinelli, Vittorio Scisciani, Cristina Pauselli, Gérard M. Stampfli, Fabio Speranza, Ivana Vasiljević (2021)
    Supported by evidence of deep crustal sources for the observed magnetic anomalies in Central Italy and by outcropping gabbros in the Croatian archipelago, we model the observed gravity and magnetic anomalies in the Central Adriatic Sea and surroundings. We suggest that the major magnetic anomalies in the area are related to a wide underplating and propose that this volume represents the first stage of the back-arc Adria continental breakup in Early Permian times. During the Palaeotethys-Adria collision, underplating has ...
    Underplating, akrecija kore, Magnetske anomalije, Jadranska ploča

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • 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
    ... Petrogenesis and Mantle Source Characteristics. Journal of Petrology, 46(7), 1443–1487. Schefer, S., Cvetković, V., Fügenschuh, B., Kounov, A., Ovtcharova, M., Schaltegger, U., et al. (2011). Cenozoic granitoids in the Dinarides of Southern Serbia: Age of intrusion, isotope geo- chemistry, exhumation ...
    ... lamprophiric and granitoid magma. In S. Karamata & S. Janković (Ed.), Geology and Metallogeny of the Dinarides and the Vardar zone, (pp. 255–267). The Academy of Sciences and Arts of the Republic of Srpska, Collections and Monographs, Book 1, Department of Nature, Mathematical and Technical Science ...
    ... for measurements and evaluations were Aniso (Bodrás 1990) and ANISOFT 4.2 and 5.1 (Chadima and Jelı́nek 2008; Chadima et al. 2018) based on Jelı́nek (1978, 1981). Test samples from each group were demagnetized in increments with alternating field (AF) (AFD300, Magnon, Dassel and LDA-3A, AGICO) or ...