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Упит dcterms_subject_txt:kinetic study

705 items

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... Santosa J.S.T., Fernandesa A.C., Giulietti M.,(2004) Study of the paraffin deposit formation using the cold finger methodology for Brazilian crude oils, J. Petrol. Sci. Eng, 45 47– 60. Santos O.G., Bordalo S.N., Alhanati F.J.S., (2001) Study of the dynamics, optimization and selection of intermittent ...
    ... 1–3, 5, 633-652. Al-Mabrouk K., Soar J., (2009) Identification of key issues for successful technology transfer in the Arab countries: a Delphi study, International Journal of Technology Transfer and Commercialisation 8 (1), 22–50. Al-Shamrani A.A, James A., Xiao H., (2002) Separation of oil from ...
    ... of Oil and Gas in Africa, the Routledge Studies in International Business and the World Economy, Taylor & Francis. ASPO - Association for the study of peak of oil and gas (2011), www.peakoil.net Auty, R., 2001. Resource Abundance and Economic Development, Oxford University Press, Oxford, UK ...

  • 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
    ... es (UAZ 7; Polak ef a/., 1998; this study) and con- tinues in the Middle Callovian-Lower Oxfordian green ra- diolarites (UAZ 8; Polak ef a/., 1998; Banie Huciska, Gltad- kie Uplazianskie, Ždiarska Vidla sections; their samples GU-6, HC-8, ŽV-2; this study, UAZs 6—9, sample Dsr96; Fig. 3). The ...
    ... which are calibrated against biostrati- graphic data (e.g., Bartolini et a/., 1999; O'Dogherty etf al., 2006; Louis-Schmid ef a/., 2007). This study focuses on a peculiar sedimcentary succes- sion of Middle-Late Jurassic age, exposed in the Tatra Mountains (Central Western Carpathians). This ...
    ... Formation and Czajakowa Radiolarite Formation and proposed the Ždiar Formation as a new unit, comprising. thce entire radiolarite succession. In this study, the formal lithostratigrahy by Lefeld ef al. (1985) is used, with the exception of the Jasenina Formation. PREVIOUS RESEARCH A few attempts ...

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... deposition of the Ljubiš Formation could have started earlier than previously thought – in the early Bathonian or even in the late Bajocian. Further study of the bio- stratigraphy and detailed analysis of the sections would be needed to achieve a better understanding of the composition and nature of ...
    ... gratitude and our respects to our friend and col­ league, Nataša GERZINA. After many joint fieldtrips, Nataša GERZINA passed away in June 2019. The study would not have been possible without the extraordinary knowledge and collabo­ ration of the esteemed Nataša GERZINA. REFERENCES AUBOUIN, J., BONNEAU ...
    ... Dotted lines show the stratigraphic ranges of taxa determined in open nomenclature and taxa for which the stratigraphic range needs more detailed study. Stratigraphic ranges were attributed according to BAUMGARTNER et al. (1995b) with additional data from SUZUKI & GAWLICK (2009) and GAWLICK et al. ...

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja
    ... methods (Dahlin, 1996). Three-dimensional (3D) surveys provide information about the whole geometry of the surveyed half-space. For this kind of study, the largest amount of acquired data is needed (couple of thousands) (Loke, 2004). 2D geoelectrical surveying was applied at the former communal ...
    ... carbon-dioxide or reduce carbon-dioxide with hydrogen (Themelis and Ulloa, 2006). Looking at the research done by the Environmental and Energy Study Institute (Pierson, 2013), and neglecting the cost of installation of such a plant, the calculated values were that one million tons on a day to ...
    ... asbestos contaminated waste, 75/2010. Belgrade, Serbia. PIERSON, R. (2013) Landfill Methane, Fact Sheet. Washington: Environmental and Energy Study Institute. REPUBLICAL STATISTICAL INSTITUTE (2011) Republic of Serbia Census report 2011. Belgrade, Serbia. REPUBLIC GEODETIC AUTHORITY (2019) ...

  • Project REASONING: Characterization and technological procedures for recycling and reusing of the rudnik mine flotation tailings

    Vesna Cvetkov, Vladimir Simić, Stefan Petrović, Filip Arnaut, Milena Kostović, Dragan Radulović, Jovica Stojanović, Vladimir Jovanović, Dejan Todorović, Nina Nikolić, Jelena Senćanski, Grozdanka Bogdanović, Dragana Marilović (2024)

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... comparing different programs in this study, we conclude that the RODSTAR program delivers the best and most optimal results, as it is specifically specialized for sucker rod pump systems and incorporates inclinometry into its calculations. The well analyzed in this study has a dogleg, and therefore, RODSTAR's ...
    ... analog computer studies of sucker rod motion. This predated the numerical solution of the wave equation and was not as general. However, the analog study did describe the motion of sucker rods and the forces carried by the rods. The original work was for conventional geometry pumping units, but the ...
    ... have on the loads of the pumping unit. RODSTAR, SROD, and AccuPump Beam can be run in two modes. The first mode, a pre- dictive mode, allows the study of various design selections, and the second mode, a diagnostic mode, allows the analysis of field dynamometer data 33 for a particular design ...

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog

    Maja D. Milošević (2016-12-09)
    Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...
    minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva
    ... Mineralogy. Introductory Concepts, Purdue University, West Lafayette, pp. 15 Sethuraman V.V. and Raymahashay B.C. 1975. Color removal by clays: kinetic study of adsorption of cationic and anionic dyes. Environ. Sci. Technol. 9: 1139 - 1140 Shaw D.J. 1970. Introduction to colloid and surface chemistry ...
    ... ehocine M. and Meniai A-H. 2010. Removal of methylene blue from aqueous solutions using an acid activated Algerian bentonite: equilibrium and kinetic studies. International Renewable Energy Congress. Tunisia 2010: 360 -367 114 Bergaya F. and Lagaly G. 2013a. Chapter 1-General introduction: ...
    ... (ANFOR), La Défense, Paris, France Al-Ghouti M.A., Khraisheh M.A.M., Allen S.J. and Ahmad M.N. 2003. The removal of dyes from textile wastewater: a study of the physical characteristics and adsorption mechanisms of diatomaceous earth. Journal of Environmental Managment 69: 229 - 238 Almeida C.A ...

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... responsible for making contributions to the resource. Type identifies the nature of the content of the resource, such as"best practice", "case study", "exercise", "guidelines", "lesson", "module", "monitoring"and "evaluation techniques", "policy brief", "portal", "promotional material", or "reference ...
    ... Slovakia, http://virtuni.eas.sk/rocnik/ 2008/pdf/aid000262.pdf, 2008. [6] Chan, L.M., Zeng, M.L., Metadata Interoperability and Standardization – A Study of Methodology Part I, Achieving Interoperability at the Schema Level. D- Lib Magazine, Vol. 12(6), 2006. http://www.dlib.org/dlib/june06/chan/06chan ...
    ... Slovakia, — http://virtuni.eas.sk/rocnik/ 2008/pdf/aid000262.pdf, 2008. Chan, L.M., Zeng, M.L., Metadata Interoperability and Standardization — A Study of Methodology Part I, Achieving Interoperability at the Schema Level. D- [6] Lib Magazine, Vol. 12(6), 2006. http://www.dlib.org/dlib/june06/chan/06chan ...

  • 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

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... ICT components within our BI system, but also within larger business networks. The section that follows is dedicated to the main results of our study, namely our approach to development of a BI system for mine safety management. The paper closes with a section offering some concluding remarks. ...
    ... Mechanical Industry". RaDMI 2012: p. pp 108-118. 9. Kolonja, L., et al., Development of terminological resources for expert knowledge: a case study in mining. Knowledge Management Research & Practice, 2015. 10. Glowacki, A. Development of a Taxonomy for Indexing Web-Based Mining Safety and Health ...

  • Energetska bezbednost sektora prirodnog gasa Srbije

    Aleksandar Madžarević, Predrag Jovančić, Miroslav Crnogorac (2023)
    U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gasom domaćeg tržišta bio je jedan od prioriteta razvoja energetike Srbije. Istovremeno, aspekt sigurnog snabdevanja bio je neizostavni deo slagalice stvaranja energetske bezbednosti. Izražena uvozna zavisnost je dominantna karakteristika sektora prirodnog gasa, tačnije, Republika Srbija je snažno zavisna od ruskog gasa, sa više od 80% uvezenih količina gasa, a do pre dve godine snabdevala se isključivo kroz jednu interkonekciju. U radu se razmatra aktuelna situacija u sektoru prirodnog ...
    N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja
    ... module Process Engineering and Environmental Protection in 2011. He finished his doctoral studies at the Faculty of Mining and Geology, UB, in the study program Mining Engineering. He works as an assistant professor at FMG, UB. Aleksandar is married and the father of three children. Predrag Jovančić ...

  • Razvoj integralnog modela za optimizaciju diskontinualnog sistema proizvodnje na površinskim kopovima nemetala

    Miodrag Čelebić (2024)
    Izbor optimalne mehanizacije u diskontinualnom sistemu transporta je jedna od najvažnijih odluka koju treba donijeti prilikom projektovanja površinskih kopova. Pri izboru optimalne mehanizacije, uticaj ima veliki broj faktora, kako prirodnih – geoloških i ekoloških, tako i tehničkih, ekonomskih i socijanih. Neki od njih se mogu izraziti numerički, u određenim mijernim jedinicama, a neki opisno, lingvističkim varijablama, shodno uslovima koji vladaju na rudnim ležištima, a koje karakterišu visok stepen neizvjesnosti i neodređenosti kako prilikom istraživanja, tako i tokom procesa eksploatacije ...
    izbor mehanizacije, tehnologija eksploatacije, diskontinualani sistem, ekspertsko odlučivanje, lingvističke varijable, MCDM, FAHP

  • Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event

    Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco (2023)
    Brachiopods, taxonomy, biostratigraphy, early Toarcian Anoxic Event, Bulgaria

  • Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content

    Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)
    Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...
    Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugs

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... geoinformatics, mining and environmental protection, geology and natural language processing, the last being in the focus of this paper. Why Study Natural Language Processing (NLP) and Computational Linguistics (CL)? Natural language processing is the technology for dealing with human language ...
    ... php/osnivaci/?lang=en results in the field of NLP for Serbian are presented in [7]. 4 Given its interdisciplinarity, NLP is not envisaged as a study programme in the Serbian higher education system. Some courses from the field are presented to students at the Universities of Belgrade and Novi ...

  • Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu

    Zoran Berisavljević, Miloš Marjanović, Uroš Đurić (2023.)
    U radu su prikazani rezultati geotehničkih istraživanja za potrebe izgradnje visećeg pešačkog mosta preko klisure reke Đetinje u Užicu. Predviđeno je da most, sistema prednapregnute trake, omogući prelaz pešacima sa desne dolinske strane na stranu Starog grada, koja je opasana strmom liticom (cca. 40 m visine). Za potrebe formiranja geotehničkog modela i strukturnog sklopa krečnjačke stenske mase korišćen je postupak fotogrametrijskog snimanja dronom. Predviđeno je da se zatežuća sila (od oko 30 MN), koju most prenosi na obalni stub, ...
    fotogrametrija, stabilnost kosina, pukotine, prednapregnuta sidra, test granične nosivosti, paker (Ližonov) test
    ... test granične nosivosti, Paker (Ližonov) test GEOTECHNICAL ASPECTS OF CONSTRUCTION OF STRESSED RIBBON BRIDGE IN UŽICE OLD TOWN Summary: This study shows the results of geotechnical investigations performed for the construction of pedestrian suspension bridge, crossing the Đetinja river in the ...

  • The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system

    Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)
    The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...
    микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми
    ... The properties of ternary nonionic surfactanUwater/oil microemulsions are very interesting scientifically and technically. A convenient way to study these systems is to measure the phase behavior at constant oil/water ratios as a function of temperature, 7, and surfactant . mass fraction, » ...
    ... at Forschungszentrum, Julich. Water was deionized and twice distilled. Phase diagram determination KahlIweit ef a/ [30,31] introduced a way of study- ing the phase behavior of ternary or quaternary mix- tures. A procedure to obtain an overview of the phases is to draw the phase diagram at a ...

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... npeysaema us paoa: Study on the Critical Raw Materials for the EU 2023, o0jaa;beHo oO cmpaHe Eaponcke KoMucuje Copper 28% Cauka 5. Ipuka3 aeMa:ba ca HajsHauajHuju yOenoM cHa00e6ahba ca KpumuuHu e/teMeRmuMa Ha c6emcKoM mp2oicuuam)y. Hsaop: Cnuka je npeysaema us paoa: Study on the Critical Raw ...
    ... rare-earth tailings dams-A case study in Baotou and Bayan Obo [123] Districts, China. Journal of environmental radioactivity, 151, p.304-310. Pan, Y. and Li, H., 2016. Investigating heavy metal pollution in mining brownfield and its policy implications: a case study of the Bayan Obo rare earth mine ...
    ... Cnuka je npeysema us pada: Study on the Critical Raw Materials for the EU 2023, o0jaa/beno o0 cmpane Esponcke koMucuje Cauka 10. IHpuka3 seMa:ba ca najsHauajnuju yOeno cRa60esama ca KpumuuHu.M e/teMeHmuMa Ha ceemcKoM mp2icuuamy. Hsiaop: Cnuka je npeyaema us pada: Study on the Critical Raw Materials ...