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Упит dcterms_subject_txt:Open educational resources

508 items

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting
    ... 561e9. [3] Thr€an D, Seidenberger T, Zeddies J, Offermann R. Global biomass potentials - resources, drivers and scenario results. Energy Sustain Dev 2010;14:200e5. [4] Parikka M. Golobal biomass fuel resources. Biomass Bioenergy 2004;27(6): 613e20. [5] Steubing M, Zah R, Waeger P, Ludwig C. Bioenergy ...
    ... 561-9. [3] Thran D, Seidenberger T, Zeddies J, Offermann R. Global biomass potentials - resources, drivers and scenario results. Energy Sustain Dev 2010;14:200—5. Parikka M. Golobal biomass fuel resources. Biomass Bioenergy 2004;27(6): 613-20. Steubing M, Zah R, Waeger P, Ludwig C. Bioenergy to ...
    ... in order to create necessary conditions for utilisation of available biomass potential. This re- quires detailed planning and management of forest resources and* Corresponding author. E-mail address: gordic@kg.ac.rs (D. Gordic). Contents lists available at ScienceDirect Energy journal homepage: www ...

  • Optimizacija i planiranje površinskih kopova stohastičkim modelima

    Dejan R. Stevanović (2015-05-29)
    Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...
    površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.

  • Uticaj klimatskih promena na vodne resurse: primer sliv reke Mlave

    Vesna Ristić Vakanjac, Saša Milanović, Ljiljana Vasić, Boris Vakanjac, Saša Bakrač, Radoje Banković, Veljko Marinović (2023)
    Na teritoriji Jugositočne Evrope, pa samim tim i u delu gde živimo (Republika Srbija i Republika Bosna i Hercegovina) za očekivati je da dođe do značajnijeg porasta temperature vazduha u značajnijoj meri, što će imati značajnijeg uticaja na padavine, njihovu unutargodišnju raspodelu, kao i pojavu sve više prisutnih ekstremnih vrednosti (izuzetno sušnih i kišnih godina). Sve ovo će uticati i na sam režim površinskih i podzemnih voda, resursa bez kojih život na ovoj planeti ne bi ni postojao. Da ...

  • Regionalna karakterizacija karstnih podzemnih voda dela centralnog Balkana u funkciji njihovog održivog korišćenja i menadžmenta

    Veljko J. Marinović (2022)
    Karstne podzemne vode koristi oko 700 miliona ljudi na svetu, čime je njihov značaj za svetsko stanovništvo nemerljiv. U sklopu doktorske disertacije vršena su istraživanja i analize karstnih sistema dela centralnog Balkana (Srbije, Crne Gore i Savskog sliva Bosne i Hercegovine), kako bi se evaluirao ovaj dragoceni resurs. Analize su vršene na primerima karstnih sistema vrela Perućac, Seljašnica, Mokra i Mlava (Srbija), Oko Bijele i Rijeka Crnojevića (Crna Gora) i vrelo Bosne (Bosna i Hercegovina), kao i na regionalnom ...
    karstni sistem, podzemna voda, pritisci na kvantitet i kvalitet, menadžment podzemnih vodnih resursa

  • The influence of rainfall factors on soil resistance to erosion

    Nikola Živanović, Vukašin Rončević, Carla Ferreira, Milica Kašanin-Grubin, Stevan Ćorluka, Veljko Rupar, Vladimir Čebašek (2024)
    rainfall, rainfall factors, erosion, soil

  • The Dictionary of the Serbian Academy: from the Text to the Lexical Database

    Ranka Stanković, Rada Stijović, Duško Vitas, Cvetana Krstev, Olga Sabo (2018)
    In this paper we discuss the project of digitization of the Dictionary of the Serbo-Croatian Standard and Vernacular Language. Scanning and character recognition were a particular challenge, since various non-standard character set encoding was used in the course of the almost 60-year long production of the dictionary. The first aim of the project was to formalize the micro-structure of the dictionary articles in order to parse the digitized text of and transform it into structured data stored in relational lexical database. This approach ...
    computer lexicography, lexical database, language resources, dictionary, Serbian language

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... RECULTIVA TION This paper is part of research applied to the coal open pit Drmno, which has as general objectives as impact of mining in the area, as well as ecological conversion solutions for coal open pit Drmno (one of the open pits of Kostolac Basin Mining Basin), favoring significant opportunities ...
    ... procedures. It is important to point out that the defined model can be used in all planning and exploitation phases of an open pit mine, regardless of whether it is a new mine or an open mine where exploitation is carried out. The iterative nature of the model enables corrective measures during the imp ...
    ... formation of reclamation and mining technologies. t is absolutely necessary to ensure the comprehensive quality preservation of land and water resources and to designate reclaimed land for a new purpose. This article presents an overview of the ranking most popular methods of land recultivation and ...

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving
    ... Crushing & Conveying Technology in Open Pit Mines Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines | Ali Nasirinezhad, Dejan ...
    ... the importance of implementing IPCC systems in open pit mines. The paper is part of a broader study related to the possibility of application the IPCC system in the Songun copper mine (Iran). Keywords: In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving ...
    ... as part of a broader study on the possibility of using the IPCC system in the Songun open pit (Iran), but the conditions for the application of the IPCC system, listed in this paper, are generally applicable in open pit mining practice. 92 REFERENCES 1. Hartman, H.J.N.J., Introductory Mining ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)
    ... constituents of many types of minerals and rocks. They are also essential to Man. Owing to their abundance in nature, they are present in all water resources and generally occur as the dominant cations with low TDS levels, whose origin is associated with large formations of sedimentary rocks (limestones ...
    ... were derived from investigations conducted berween 2008 and 2A12. Groundwater was sampled at 257 locat"ions across Serbia, includ- ing groundwater resources featuring low and high Total Dissolved Solids (TDS). The sampling network was designed to cover the entire territory of Serbia evenly and address ...
    ... ATcGIS 10.0 software. 3.3 RESULTS AND DISCUSSION 3.3.1 General groundwater quality Serbia's highly complex geology has resulted in groundwarer resources featuring different types, temperatures and TDS levels. The dominanr anion was the hydro- carbonate ion. Apart from several occurrences of sulfate ...

  • Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin

    Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović (2014)
    menadžment podzemnih voda, monitoring, kvalitet podzemnih voda, bilans, baza podataka
    ... faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs 97 Carpathian Journal of Earth and Environmental Sciences, August 2014, Vol. 9, No. 3, p. 97 - 108 GROUNDWATER RESOURCES FOR DRINKING WATER SUPPLY IN ...
    ... 10:17:15 Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Groundwater resources for drinking water supply ...
    ... Regional IWA Conference on Groundwater in the Danube river basin and other large river basins, Jaroslav Černi Institute for Development of Water Resources, Belgrade, pp 83-102. Đurić D., Josipović J., Jevtić G., Slimak, T., & Pušić, M., 2007. Groundwater Management in Vojvodina, Proceedings Regional ...

  • Developing Termbases for Expert Terminology under the TBX Standard

    http://romeka.rgf.rs/s/repo/item-set/522 (2014)

  • Gold and Silver in Serbia

    Jelenković Rade (2011)

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... area of 320 km?, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In ...
    ... Kovin 2 / Open Pit Drmno under running |0 Low M High R. Vel ika M or av a OI II Coal Layer Zn avg. = 40 ppm R. Vel ika M or av a |0 Low M High III Coal Layer Zn avg. = 30 ppm |0 Low M High R. Vel ika M or av a ICoalLayer Pb avg. = 40 ppm Kovin 2 Open Pit Drmno ...
    ... laterally or in depth, but there is a potential for thcir further research outside the existing exploration fields. The general calculation of coal resources for all 5 coal seams yielded about 5.75 B t of coal. 2. GEOCHEMISTRY OF LIGNITE, ACCOMPANYING SEDIMENTS AND SOIL IN THE BASIN AREA Numerous ...

  • 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
    ... ecearth element resources: opportunities . and challenges. Economic Geology, 110(8), p.1925-1952 [88] Paulick, H. and Machacek, E., 2017. The global rare earth element exploration boom: An analysis of resources outside of China and discussion of development perspectives. Resources Policy, 52, p ...
    ... cCrpaHe KoMmaHuje HapHraTop pecoypcec (eHTJ. Navigator resources) [Morgan, 2012.] [112]. . Tu(opnoB norok (enrun. Gifford Creek), aananna aycrpanuja, eKcrnnmoaranuja je BpmeHa oJl crpaHe KoMmaHuje ApreMHc pecoypcec (eHr. Arfemis Resources Ltd) [Haque, Hughes, Lim, Vernon, 2014.] [74]. . IInanuHa ...
    ... financial perspective. Resources Policy, 53, p. 26-45. [5] Jha, A.R., 2014. Rare earth materials: properties and applications. CRC Press. [6] Dutta, T., Kim, K.H., Uchimiya, M., Kwon, E.E., Jeon, B.H., Deep, A. and Yun, S.T., 2016. Global demand for rare earth resources and strategies for green ...

  • Stanje i potencijali mineralnih resursa istočne Srbije

    Jelenković Rade (2014)

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction

  • Detecting the boundaries of gravity anomaly sources using the vertical and tilt derivative

    Snežana Ignjatović, Ivana Vasiljević, Branislav Sretković ( 2024 )
    In geophysical exploration, it is important to define the boundaries of anomaly sources that are not visible on the surface. Information about the boundaries of sources can help during geophysical geological modeling of the survey area. A model of the survey area can help in better defining the geological structure and geological development of an exploration area. This paper presents how the procedures of vertical and tilt derivative on gravity data can help to detect the ...
    gravitacioni podaci, granica, sliv Žagubice

  • Mapping the Late Miocene – Pliocene shelf-edge clinoforms across the Pannonian Basin

    Magyar Imre, Radivojević Dejan, Rabagia Anna Maria (2010)

  • Sustainable use of the Kalenić deponies

    Polomčić Dušan, Bajić Dragoljub, Ratković Jelena, Pajić Pajić (2018)

  • Global trend and negative synergy: Climate changes and groundwater over-extraction

    Stevanović Zoran (2013)