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Упит dcterms_subject_txt:Fluid Flow and Transfer Processes

2351 items

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... sub-unit, which was driven by a transfer of deformation in the orocline and around the Moesian Platform during the last stages of Carpathians collision. These results show that the mechanics of oroclinal bending is associated with the activation of strike-slip faults and strain partitioning by bi-modal ...
    ... reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous. Tectonophysics 675, 103–140. Menant, A., Sternai, P., Jolivet, L., Guillou-Frottier, L., Gerya, T., 2016b. 3D numerical modeling of mantle flow, crustal dynamics ...
    ... Dinarides orogenic processes. Although many structural elements are common with neighbouring segments of the South Carpathians and Balkanides, a number of defor- mation stages are specific to the studied area that relate in particular to multi-phase extension, strike-slip deformation and vertical axis ...

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... multimedia technologies and the Internet to improve the quality of learning by facilitating access to resources and services, as well as remote exchange and collaboration” [16]. A value- oriented definition of E-learning, sees it as a broad combination of processes, contents, and infrastructures to ...
    ... to use computers and networks to scale and/or improve one or more significant parts of a learning value chain, including management and delivery [17]. E-Learning supports the educational processes utilizing information and communications technology to mediate synchronous as well as asynchronous ...
    ... of the experience of learning of users (students and workers). 5. CONCLUSIONS Kahan and Goodstadt [25] conceive evaluation as a set of research questions and methods properly articulated to review processes, activities and strategies, with the aim of achieving better results; the LFM ...

  • Application of Thermal Imaging in Surface Mining

    Milanka Negovanović (2022)
    Termalno snimanje se sve više koristi u rudarskoj industriji kao jedan od dijagnostičkih alata za praćenje određenih proizvodnih procesa, kao i stanja opreme i mašina. Predstavlja nedestruktivnu i beskontaktnu metodu ispitivanja koja omogućava rano otkrivanje problema, planiranje održavanja sa minimalnim kvarovima, sprečavanje neplaniranih poremećaja, posmatranje materijala u nepristupačnim ili opasnim područjima i poboljšanje bezbednosti i produktivnosti. Termalno snimanje koristi specijalizovane termalne kamere sa unutrašnjim detektorima koji identifikuju veoma male temperaturne varijacije i proizvode sliku tog nevidljivog infracrvenog ili toplotnog ...
    Termalno snimanje, nedestruktivne metode testiranja, površinska eksploatacija, termalne kamere, rudarske operacije

  • 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

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

    Stevanović Zoran, Dulić Ivan, Dunčić Milena (2013)

  • 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)

  • 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

  • Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt.

    Branislav Petrović (2022)
    The epikarst is a part of the karst outcrop that is located within the unsaturated zone and represents a complex point of contact and mixing of unconsolidated material from the terrain surface. The correct and complete perception of epikarst, its degree of development and the presence on the limestone terrain can be achieved with a multidisciplinary approach. The study area for the applied multidisciplinary research was the Eastern part of karst massif Suva Planina Mt. One important part of ...
    epikarst, specifična električna provodljivost, Suva Planina, pećina Peč

  • Applicability of the risk ranking methodology designed for water reservoirs to tailings storage facilities

    Dragana Nišić, Dinko Knežević, Aleksandar Cvjetić, Neda Nišić, Vladimir Jovanović (2022)
    The risks associated with operating water reservoirs and tailings storage facilities (TSFs) are different because of their different purposes, methods of construction and operation, and characteristics of the materials impounded and their flow behaviour. Regardless of the differences, these two types of structures are often put in the same category when it comes to risk assessment and the application of relevant methodologies, which may result in unrealistic outcomes. In this paper we investigate whether it is possible to apply ...
    procena rizika, akumulacije za vodu, jalovište, TSF, ICOLD, FMEA

  • The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA

    Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski (2017)
    Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...
    Pd(II), Selen, Substitucija, Kinetika, Mehanizam

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... a small vari- ation of flow rate and temperature over the year (Meggers and Leibundgut 2011). Due to the high heat capacity and density, wastewater is considered as a suitable heat source for implementation in heat pumps (HP) systems, whose operation is based on simple and proven technology (Hep- ...
    ... wastewater ṁ Mass flow of treated wastewater t Temperature difference of treated wastewater at entrance and exit of heat exchanger–evaporator Q̇ h Thermal power of heat pumps COP Coefficient of performance t lift Temperature deference between treated wastewa- ter and supply water Q HP ...
    ... e heat power-treated sewage wastewater, ṁ [ kg s ] Mass flow of treated wastewater, c [ kJ kgK ] Specific thermal capacity of treated wastewater, t[K] -Temperature difference of treated wastewater at entrance and exit of heat exchanger–evaporator. The temperature difference is the ...

  • The State and Perspective of Belgrade District Heating System Development

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić (2019)
    District heating (DH) system in Belgrade provides energy for heating of more than 21 million m2 in households (app. 50% of all households), public, commercial and industry sectors. Public Utility Company “Beogradske elektrane” is responsible for all segments of the DH system operation. The system is fueled mostly by natural gas. The share of renewables is negligible. The research analyzes effects of implementation of two main projects proposed in the Development Strategy of the PUC - the introduction of ...
    daljinsko grejanje, Beograd, razvoj
    ... etc.) Although obtained results show different levels of reduction in energy consumption and emission, the production of heat energy remains based on combustion processes. Therefore, some other, non-combustible energy sources should be considered in order to make the Belgrade DH system more sustainable ...
    ... of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Dejan Ivezić is Professor in Energy and Sustainable Development at University of Belgrade – Faculty of Mining and Geology, Head ...
    ... Head of the Center for Energy. He has more than 20 years of experience in research and involvement in Serbian energy planning and policy making. The State and Perspective of Belgrade District Heating System Development Dejan Ivezić (presenter)1, Marija Živković1, Aleksandar Madžarević1, Fethi ...

  • The influence of structural modification of Pd(II) pincer-type complexes on the kinetics of substitution reactions

    Snežana Jovanović Stević, Snežana Radisavljević, Aleksandar Mijatović, Biljana Petrović, Ana Kesić (2023)
    This mini-review summarizes the kinetic data obtained for the substitution reactions of some palladium(II) complexes containing bis-pyrazolylpyridine derivatives as pincer-type ligands with biologically significant nitrogen- and sulfur-donor biomolecules as nucleophiles. Three structurally different palladium(II) complexes were selected: [Pd(L1)Cl]+ (Pd1), [Pd(L2)Cl]+ (Pd2) and [Pd(L3)Cl]+ (Pd3) (where L1 = bis(2-(1H-pyrazol-1-yl)ethyl)amine, L2 = 2,6-bis(5-(tert-butyl)-1H-pyrazol-3-yl)pyridine, and L3 = 2,6-bis(5-(tert-butyl)-1-methyl-1H-pyrazol-3-yl)pyridine, while for the entering nucleophiles were used thiourea (Tu), L-methionine (L-met), and guanosine-5’-monophosphate (5’-GMP). Kinetic measurements were carried out for all systems as pseudo-first ...

  • Why classical sequence stratigraphy doesn't work in Pannonian basin?

    Dejan Radivojević (2018)
    basen iza ostrvskog luka, detačment, miocen, Panonski basen, riftogeneza, sekvenciona stratigrafija
    ... lope and turbidite flow formations  which were defined  in northwestern part of Pannonian basin  (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  ...
    ...  are  prograding toward southeast, between 0 and 120 are mostly well defined, while at around 120 km the  chaotic  group  of  reflections  are  present.  These  reflections were  formed  along  the  normal  fault  and  probably originate  from mass  flow. The series of progradational  reflections  t ...
    ... Carpathians  and  Dinarides,  Tectonics 31(6), TC6007.  Nottvedt, A. R.H. Gabrielsen, and R.J. Steel, 1995. Tectonostratigraphy and Sedimentary Architecture of  Rift  Basins,  with  reference  to  the  Northern  North  Sea. Marine  and  Petroleum  Geology,  12,   881–901.    Posamentier, H.W., and G. P. Allen ...

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... developed at the Faculty of Mining and Geology of the University of Belgrade (Lilić, Stanković, and Obradović, 1994). This package, which enables the simulation of air flow distribution in a mine, the heat and fire transmission mechanisms, distribution of gas and distribution of respirable mineral ...
    ... the system. In order to cope with this problem a separation of processes in coupled systems into independent modules is suggested. Furthermore, information interchange, i.e. communication among modules is strictly defined and reduced to the lowest possible degree. Communication between two ...
    ... facts and heuristics which can be represented by means of rules, frames, semantic networks and other formalisms. Since knowledge is the key factor in problem solution and decision making, the quality and usability of an expert system is basically determined by the accuracy and completeness ...

  • Optimizacija ispirnih fluida za bušenje dirigovanih bušotina

    Vukoman Krgović (1994)
    Ispirni fluidi, dirigovano bušenje

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

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

  • Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu

    Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić (2022)
    Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...
    flotacijsko jalovište, makroelementi, magnetna merenja

  • 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
    ... types of landslide mechanisms. In general, a more reliable connection between slope inclination and sliding processes can be found for rock fall and shallow landslides, while for deep seated landslides and especially those in the presence of groundwater, it is a very unpredictable property. Each suscepti- ...
    ... to all gravitational processes, and rates of material movement are largely dependent on it. However, in the sense of measuring its potential to develop landslides, rat- ing slope inclination is not a trivial problem, especially on re- gional scale landslide susceptibility and for models that should ...
    ... landslides in the Republic of Macedonia showed that bed- rock and superficial geology are among the most important fac- tors for development of landslide processes (PESHEVSKI et al., 2013). This is usually the case with such diverse lithologies as those present in the Western Balkans. In our case study ...