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Упит dcterms_subject_txt:deep well pump

929 items

  • Analiza uslova formiranja oticaja reke Resave (istočna Srbija)

    Vesna Ristić Vakanjac, Marina Mitrašinović, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Branislav Petrović, Petar Vojnović (2023)
    Reka Resava zbog veličine sliva i količine vode koju daje Velikoj Moravi predstavlja jednu od najznačajnijih njenih desnih pritoka. U okviru njenog sliva jasno se izdvajaju gornji, geomorfološki raznolik deo sliva, koji je uglavnom izgrađen od karbonatnih sedimenata, i donji deo koji pripada Velikomoravskom basenu. Proticaj reke Resave se beleži u profilima Manastir Manasija koji kontroliše gornji deo sliva u iznosu od 358 km2 i Svilajnac, koji se nalazi na oko 3.5 km pre njenog ušća i koji kontroliše ...

  • Distribution of Uranium and Rare Elements in Radioactive Phosphate-Bearing Anomalies in Southeast Mongolia

    Boris Vakanjac, Neil Rutherford, Vesna Ristić Vakanjac, Tanita Đumić, Suzana Đorđević Milošević (2020)
    Soviet and Mongolian geologists initiated geological exploration of Mongolia for minerals after World War II (1945). These activities lasted until the breakup of the USSR in 1991. As part of this exploration systematic uranium and rare element exploration was undertaken across Mongolia. New exploration resumed in Mongolia at the beginning of the 21st century for a range of ore and mineral deposit styles including uranium, coal, base and precious metals and Fe-ore. This was generally undertaken by Western-based companies. This ...
    uran, radioaktivnost, kreda, retki elementi, fosfati, anomalije, Dornogobi

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... that pre- vent pollutants from permeating from the ground surface. It should be noted, however, that water supply systems are comprised of relatively deep (70-250 m) drilled wells which tap Pliocene-Pleistocene sediments, while no elevat- ed arsenic concentrations were recorded in the “first” (shal- low) ...
    ... dominated by sodium, in concentrations of 200-300 mg/L, while the con- centrations of calcium (<50 mg/L) and magnesium (<30 mg/L) are low, which is rare in deep aquifers. The dominant anions are hydrocarbonates, while the concentrations of sulfates (3-90 mg/L), chlorides (5-50 mg/L), and fluorides (0.1-1 mg/L) ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 Introduction Arsenic (As) occur naturally in the environment ...

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 2016 | 69/3 | 317–324 | 6 Figs. | 4 Tab. | www.geologia-croatica ...
    ... influence the dis- ruption of the environment, which is reflected in the pollution of: air, soil, surface water and groundwater, vegetation cover, as well as in the steady ecosystems disruption that affects human health (MILETIĆ & ILIĆ, 2007). All the negative environmental indicators caused by fly ...
    ... proper- ties, chemical and mineral composition of the ash and slag. Es- tablished correlations are indicators for defining the origin, pro- perties, as well as the possibility of fly ash and slag application as a construction substitute thus preservinglimited reserves of natural building materials. 2 ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... destiny since their work got truly ac- knowledged long after their deaths. Milanković’s theory awaited confirmation until HAyS et al. (1976) studied about deep-sea sediment cores from the southern Indian ocean during CLIMAP project. Hays and the coauthors were finally able to correlate cli- mate fingerprints ...
    ... consequences of the interactions of the atmosphere and the geosphere are best observed in the relatively recent events while during the geolog- ical “deep” time these relations become blurry. As an example, from the end of the Paleocene (55.8 Ma ago) to current glaciation, the global average tem- perature ...
    ... RADIvojEvIć, D.N. 2020. Naftna industrija i klimatske promene [The oil industry and climate changes]. Tehnika, 75 (1): 31–37. RoUTLEDGE, R. 2013. Deep Time: The Story of Mother Earth. Retrieved from http://www.alpineanalytics.com/Cli- mate/DeepTime.html SCHER, H. D. & MARTIN, E. E. 2006. Timing ...

  • Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions

    Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)
    A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • Integrative GHG Assessment in Oil and Gas Industry

    Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa (2023)
    Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...
    energetska tranzicija, gasovi staklene baste, industrija, nafta i gas
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 e> energija, ekonomija, ekologija, 2023, god. XXV, br. 1 ...
    ... effects. With thc Paris Agreement in 2015, signatory countries achicved international consensus to limit increases in the global average temperature to well below 2%C compared to pre-industrial levels, and to make efforts to limit the temperature increase to 1.55C compared to pre-industrial levels [6] ...
    ... fuels in stationary and mobile applications. These activities result in emissions of carbon dioxide (CO») from the combustion of fossil fuels, as well as from non-combustion sources. Most of the emissions come from combustion, while a small amount arises as fugitive emissions from “cxtraction ...

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 The Seventh International Conference on eLearning (eLea ...
    ... put together partners from Western Balkans and EU universities from Serbia, Montenegro, Bosnia and Herzegovina, Italy, Slovenia and Romania as well as two partners from industry [5]. The idea of the project was to establish a system for creating, publishing, maintaining and searching of OERs ...
    ... s in various fields. The realization of the application was based on the ASP.NET Framework for C# programming language and MVC design pattern, as well as HTML and JavaScript, whereas SQL Server served as support for the database. The application is located at http://termi.rgf.bg.ac.rs/ and consists ...

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Depth geological relations of the wider area of Belgrade - based on the wells and geophysical data

    Đorđe Marinović, Ljupko Rundić (2020)
    Предметна референца обухвата простор шире околине Београда укупне површине око 2.000 km2. Аутори су објединили капиталне геолошке и геофизичке податке обезбеђене површинским истраживањима и мултидисциплинарним елементима из 52 бушотинe са дубинама између 33 и 2.733 m. Конкретни палеонтолошки налази специјализованих аналитичара са детерминацијом макро и микрофауне и флоре, презентовани су како из неогених формација тако и из басенске подине. Осим конвенционалних петролошких описа стена цитиране су и микроскопске детерминације интрузивних и екструзивних магматита. Из затвореног басенског простора корелативно су ...
    неоген, дубинска разграничења, геофизички показатељи, структурно-палеогеографска интерпретација

  • Groundwaters of the "Valjevo karst" area (Western Serbia)

    Petar Dokmanović, Veljko Marinović (2021)
    “Ваљевски карст” је подручје кoje заузима површину од око 780 km2, док откривени кречњак чини око 330 km2. Припада Унутрашњим Динаридима западне Србије. У литостратиграфском погледу доминирају карстификовани кречњаци средњег и горњег тријаса у којима су формиране карстне издани. Анализирани су и систематизовани доступни подаци хидрогеолошких и других релевантних истраживања. Приказана је разграната мрежа траса подземних вода између понора и дренажних пунктова, као и главне карактеристике шеснаест карстних врела (или „разбијених“ дренажних зона) и девет (група) бунара, подељених ...
    карстнa издан, трасе подземних вода, извори, бунари, издашност, вишенаменско коришћење.

  • Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела

    Трајче Бошевски (2021)
    Одлучивање и управљање у рударству је захтеван и сложен задатак изложен ризицима. Конвенционални-искуствени приступи доношења одлука, у пракси често показују слабост која се огледа у недовољној поузданости и прецизности. Предмет истраживања докторске дисертације, под називом „Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела“ је да, сагледавањем научних метода линеарног програмирања, приступи формирању локацијских модела који би били засновани на анализи и прилагођавању постојећих и увођењу нових претпоставки за случајеве као што је експлоатација и потрошња кречњака. У дисертацији ...
    оптимизација, линеарни локацијски модел, линеарно програмирање, експлоатација и производња кречњака

  • The impact of temporal variability of groundwater levels on groundwater vulnerability maps in karst terrains – a case example of the Perućac spring catchment area

    Vladimir Živanović, Igor Jemcov, Nebojša Atanacković (2022)
    Groundwater vulnerability maps represent an essential tool for protecting karst groundwater resources. Vulnerability assessment is usually based on spatial evaluation of various parameters that affect the vulnerability degree and regulate the protection role of the unsaturated zone. Most of these parameters, like soil and geology conditions, are constant and do not change during the year or over several years. In contrast, some parameters, such as the groundwater level, depend on the variability of recharge conditions. By considering the variability ...
    karst groundwater vulnerability maps, parameter changes, Perućac spring, Serbia

  • Analiza sistema odvodnjavanja površinskog kopa Drmno od podzemnih voda sa severnim savršenim ekranom

    Tomislav Šubaranović, Dušan Polomčić, Vladimir Pavlović (2019)
    Izrada nesavršenog ekrana do drugog sloja uglja na površinskom kopu Drmno, pored zadržavanja postojećih standardnih metoda odvodnjavanja od podzemnih voda linijama bunara, predviđena je poslednje decenije u celokupnoj rudarskoj projektnoj dokumentaciji. Iz objektivnih i subjektivnih razloga njegova realizacija nije ostvarena do danas. U međuvremenu je, uz dodatna geološka istraživanja i promenu dinamike i parametara sistema površinske eksploatacije, došlo do određenih značajnih prostornih promena geoloških i rudarskih uslova u eksploatacionom polju. Ovo je omogućilo preliminarno inoviranje pristupa procesu i konceptu ...
    podzemne vode, odvodnjavanje, bunari, ekran, dinamika, troškovi

  • Industrial Waste Heat Potential for Meeting Heat Demand in the Republic of Serbia

    Dejan Ivezić, Marija Živković (2023)
    Finalna potrošnja energije u industrijskom sektoru čini skoro 25% finalne potrošnje energije u Republici Srbiji. Procenjuje se da je 50-70% potrošnje energije u industriji namenjeno proizvodnji toplotne energije u različitim industrijskim procesima. Deo proizvedene toplotne energije se nepovratno gubi kao energija odvedena u okolinu: prenosom toplote kroz zidove procesne opreme, dimnim gasovim, otpadnim vodama itd. Korišćenjem otpadne toplote povećava se efikasnost korišćenja primarne energije i smanjuje ukupna potreba za energijom. Otpadna toplota se može koristiti u samom industrijskom objektu ...
    otpadna toplota, industrija, toplotne potrebe

  • 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)
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 No. 3, 2015 Mining & Metallurgy Engineering Bor 53 MINING ...
    ... 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 large amounts of explosives, leading to an increase in the negative effects of mining ...
    ... sound effect, scattering the blasted rock mass, and similar are assumed. In order both to evaluate and control the seismic effect of blasting, as well as to plan it, the determi- nation of soil oscillation law is required, with the strike: mine field - facilities to be protected. One of the most ...

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 Scientific paper Old or new, we repair, adjust and alter (texts) ...
    ... dj ); – dz – can stand for dž (and dz ). When compared with the problem of OCR errors, it can be observed that the repertoire of these “errors”6 as well as their possible corrections is limited and is known in advance. Namely, candidates for correction are only those that are represented in dictionaries ...
    ... preceding adjective ukršten). These dictionary contains all inflective forms,so, for instance, ukrstenih reci (the ginitive form) would be corrected as well – ukrštenih reći-. After the application of the diacritic restoration procedure, a new version of the text is obtained which contains, for each word ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... al. 2008). The Middle Jurassic (Gawlick et al. 2009) sub-ophiolitic melange consists of (1) fine-grained siliciclastic matrix accumulated in a deep basin formed ahead of advancing ophiolitic thrust sheet that comprises blocks of various size and lithology; and (2) material scraped off from the ...
    ... 2012). The dominantly brittle D> structures imply that the final (latest Cretaceous-Paleogene) suturing of Adria and Eur- ope did not result in deep tectonic burial of the Drina- Ivanjica thrust sheet (Fig. 8). Thus D, deformation occur- red at shallow crustal levels, which is in agreement with ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty 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 Swiss Journal of Geosciences |+ | https://doi.org/10.100 ...

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...