Претрага

Упит dcterms_subject_txt:debris flow

251 items

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... sandstones and siltstones with plant debris). The more fine-grained members of the unit are rarely disturbed by thin, structureless sandstone beds of facies S1. The intervals of sandstone beds with irregular wavy lamina- tion represent deposition under a combined flow (facies S3w). According to the proposed ...
    ... 2018), unit C is deposited in conditions of density reversal of a hyperpycnal flow due to its reduction caused by ongoing sedimentation which leads to deposition of fine-grain particles and more buoyant plant debris (GLADSTONE & PRITCHARD, 2010). This lofting pro- cess takes place in the marginal ...
    ... intervals of the turbidites followed by plant debris accumulations on lamination surfaces within the bottom, coarse- grained levels of the next bed (beds D12 and D13, Fig. 12;). The presence of Dictyodora liebeana (GEINITZ) in proximity to vas- cular plant debris is observed in several intervals of units ...

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... obtained. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data ...
    ... the analysis of mine ventilation networks with the help of SimVent. Among these possibilities the following should be stressed: • determining air flow distribution throughout the ventilation network, • simulation of climate conditions in mine chambers, • modeling of fire incidence in ventilation ...
    ... in mine ventilation networks, transformed into the SimVent software package is composed of the following blocks: 1. a block for the analysis of air flow and pressure distribution in the ventilation network, 2. a block for the analysis of climate conditions in mine chambers, 3. a block for temperature ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... obtained. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data ...
    ... the analysis of mine ventilation networks with the help of SimVent. Among these possibilities the following should be stressed: • determining air flow distribution throughout the ventilation network, • simulation of climate conditions in mine chambers, • modeling of fire incidence in ventilation ...
    ... in mine ventilation networks, transformed into the SimVent software package is composed of the following blocks: 1. a block for the analysis of air flow and pressure distribution in the ventilation network, 2. a block for the analysis of climate conditions in mine chambers, 3. a block for temperature ...

  • Landslide Umka-the first automated monitoring project in Serbia

    Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Vujanic Vladeta (2012)

  • 3D Terrestrail Laser scanning and GPS Technology for slope stability investigations-case studies

    Abolmasov Biljana, Pejić Marko (2012)

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... rank order of alternatives. Multi-criteria ranking method PROMETHEE introduces qualities of positive, negative and net flow [29]. The results obtained from positive, negative and net flow are presented in Table 11. Table 11. PROMETHEE flows. Alternatives Ph+ Ph− Ph A1 0.4019 0.2155 0.1864 A2 0.3157 0 ...
    ... 100 m About 50 m About 50 m Vicinity of agricultural area—C3 About 500 m About 200 m About 50 m About 50 m About 50 m Vicinity of permanent water flow—C4 About 100 m, Ibar About 50 m. Ibar About 50 m, Ibar About 50 m, Ibar About 70 m, Ibar Quantity of deposited material—C5 9,961,113 t 26,344,212 ...
    ... Criteria Analyzed Criteria C1 Proximity of water source C2 Proximity of the settlement C3 Proximity of agricultural area C4 Proximity of permanent water flow C5 Quantity of material deposed C6 Existence of the flooding water sources C7 Activity of the tailings C8 Geological environment C9 General slope of ...

  • Water Evacuation from the “Sarića Osoje“ Municipal Waste Landfill of Užice

    Šušić Nenad, Rakić Dragoslav, Đoković Ksenija, Berisavljević Dušan (2012)

  • Landslide Umka-the first automated monitoring project in Serbia

    Abolmasov Biljana, Milenković Svetozar, Jelisavac Branko, Vujanić Vladeta (2011)

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • 3D Terrestrail Laser scanning and GPS Technology for slope stability investigations-case studies

    Abolmasov Biljana, Pejić Marko (2011)

  • Some experiences in tapping deep thermal waters of Triassic karstic aquifer in Pannonian basin of Serbia

    Stevanović Zoran, Dulić Ivan, Dunčić Milena (2013)

  • Genesis and circulation of fresh and thermal groundwater flows in same karstic aquifer - Case examples from the Carpathian karst of eastern Serbia

    Vasić Ljiljana, Milanović Saša, Stevanović Zoran (2013)

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes

    Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić (2011)
    Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...
    Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
    ... the presence of 10 mM NaCl. The reactions were carried out at three different temperatures (288, 298 and 308 K) using a variable-temperature stopped-flow technique. The substitutions were followed under the pseudo-first-order conditions with a large excess of nucleophiles. Obtained results show that the ...
    ... the presence of 10 mM NaCl. The reactions were carried out at three different temperatures (288, 298 and 308 K) using a variable-temperature stopped-flow technique. The substitutions were followed under the pseudo-first-order conditions with a large excess of nucleophiles. Obtained results at show that ...
    ... spec- trophotometers with thermostated 1.00 cm quartz Suprasil cells. Kinetic measurements were performed on an Applied Photophys- ics SX.18 stopped-flow instrument coupled to an online data acqui- sition system. The temperature was controlled throughout all kinetic experiments to ±0.1 K. 2.3. Kinetic ...

  • Tectonic fabric as the main factor for privileged groundwater pathways, discharge regime and thermal properties within the same karstic system of Vidlic Mt. (Serbia)

    Stevanović Zoran, Ristić-Vakanjac Vesna, Milanović Saša, Vasić Ljiljana, Petrović Branislav, Čokorilo Marina (2013)

  • Cytotoxic activity of tetradentate Schiff Base Copper(II) complexes

    Nevenka Gligorijević, Aleksandar Mijatović, Sandra Aranđelović, Rada Baošić (2021)
    Istraživanje kompleksa bakra kao potencijalnih antikancerogenih agenasa nudi ohrabrujuće perspektive u odnosu na komplekse platine (II) računajući na smanjenu toksičnost, novi mehanizam delovanja, različit spektar aktivnosti i perspektivu neunakrsne rezistencije. Kompleksi Šifovih baza bakra(II) koji sadrže tetradentatne ligande acac2en tipa (acac2en (1); tfacac2en (3), acactfacacen (4), acacphacacen (6)) pokazali su važnu antioksidativnu aktivnost, visok potencijal za interakciju sa HSA i DNK, u prethodnim studijama. Zbog toga je bilo interesantno ispitati i uporediti potencijal antikancerogene aktivnosti in vitro, u odnosu ...
    Bakar(II) kompleksi, citotoksičnost, ćelijski ciklus

  • Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells

    Bojan Martinovic, Marija Živković, Branko Grubač (2021)
    Electric submersible pumps (ESP) are applied in wells where additional energy is needed to ensure discharge of the fluid to the surface through the tubing. At the discharge side of the pump the fluid has bigger velocity, thus the pump induces a forced convection between the fluid and the tubing inner surface. Understanding of convective heat transfer in wellbores and analyses of influential parameters provides a possibility to optimise value of convective heat transfer coefficient in order to avoid ...
    prenos toplote konvekcijom, ESP pumpa, svojstva fluida, problemi u radu bušotine

  • Filter rules for soil and geosynthetics

    Dragoslav Rakic, Irena Basaric Ikodinovic, Milenko Ljubojev (2021)
    Štetni efekti izazvani strujanjem vode kroz različite građevine (brane, nasipi i sl.) uspešno se rešavaju ugradnjom različitih filterskih slojeva. Osnovne funkcije filterskih slojeva su brza evakuacija vode uz sprečavanje unutrašnje erozije i iznošenje sitnih čestica tla. Ovi filterski slojevi najčešće se grade od krupnozrnih materijala (pesak, šljunak, kameni agregati), ali se pored prirodnih materijala sve više koriste i veštački geosintetički materijali. U radu su prikazana osnovna filtarska pravila koja treba ispoštovati da bi se izvelo uspešno projektovanje različitih filtracionih ...
    filter, baza, granulometrijski sastav, vodopropustljivosti, stabilnosti, začepljenje, izdržljivost

  • Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field

    Bojan Martinović, Dušan Danilović, Branko Grubač, Robert Fadiga (2022)
    Most of the wells in the oilfield Turija are operating with sucker rod pumps, where casing pressure at around 15 bar, and with marginal production rates. The high value of casing pressure indicates high pressure on the face of the formation and depends directly on well productivity. In addition, with increasing value of the casing pressure gas column in the annulus is moving the dynamic fluid level near pump intake and more gas is entering the pump, it results ...
    beam gas compressor, BGC, increase productivity, sucker rod pump, SRP, mature field, artificial lift, production optimisation

  • 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