Претрага

Упит dcterms_subject_txt:Sustainability and the Environment

2800 items

  • New Language Models for South Slavic Languages

    Mihailo Škorić (2024)
    Izlaganje će predstaviti izazove i perspektive modelovanja južnoslovenskih jezika, sa posebnim osvrtom opšte jezičke modele građene na arhitekturi transformera (BERT, GPT), na dostupne skupove tekstova za obučavanje tih modela, te kvantitet i kvalitet tih skupova. Izlaganje će ponuditi pregled dostupnih skupova i modela, dok će posebna pažnja biti posvećena najnovijim korpusima tekstova. Prvi korpus, Kišobran, predstavlja krovni veb korpus južnoslovenskih jezika i ujedno trenutno najveći korpus tekstova na našim prostorima koji broji preko osamnaest milijardi reči i uključuje sve ...
    veliki korpusi teksta, jezički modeli, južnoslovenski jezici

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... distance from the blasting site to the monitoring place, characteristics of the working environment and conditions of blasting. 5. DEFINING STATISTICAL CRITERIA For the above-mentioned models 1 — 5, on the basis of experimental data, we can get equations that can give us the rock mass oscillation ...
    ... of kilograms per a drillhol and blasting with dozens and even hundreds of tonnes of an explosive are being apllied in the world nowdays. Such large quantities of an explosive can cause seismic shocks with the intensity that can have hazardous impact on the environment and result in moving of buildings ...
    ... MASS OSCILLATION EQUATION In the Equation (1) tvo parameters appear, K and m, which need to be determined for a specific work environment and specific blasting: conditions. It is possible to determine the parameters K and n in many ways, 1.e., models, using the values obtained by experimental ...

  • 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
    ... directly affect the degradation of agricultural lands. Predictions of the effects on the environment are very important and present the concern in the sense of the loss of surface area and space for living. The study on the environment has a basic description of the effects that are expected, and it is a ...
    ... reintegrate the degraded areas into the productive and/or ecological area of the regions where they are located, which leads to the regeneration of their cconomic potential; improving the quality of the environment; reducing slopes and diminishing the intensity of erosion phenomena and accelerating the vegetation ...
    ... surface x K5 Adaptability of the recultivation solution to the environment X Ko Local needs (local community interest) X K7 Social and economic importance of reclamation for the local community X K8 The percentage share of the recultivation form (variant) in the total X recultivation operation ...

  • Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    Around 2/3 of electricity production in Serbia originates from coal-fired thermal power plants. The most significant domestic coal deposits are lignite deposits, a type of low -quality coal that causes negative health, climate and environmental impacts during the combustion. To reduce those negative impacts on domestic electricity production and to promote environmental awareness, the Serbian Energy Sector Development Strategy and the National Action Plan for Use of Renewable Energy Sources indicate the plan for increasing the share of ...
    Strategija obnovljive energije, Održiva energija, Proizvodnja električne energije, Solarna energija, Biomasa, Hidroenergije, Energija vetra
    ... contribution of each RES to the in dependent, affordable, reliable and environment-friendly national electricity sector. Therefore, th e m ost potential RES for electricity production in Serbia has been a ssessed in or der to choose th e best solution for reducing the usage of lignite for electricity ...
    ... hydro, solar and wind) in regard to the defined criteria. The obtained weights for the a n alyzed RES are formed according to the experts' judgments and availa ble literature. The results of th e FAHP reveal that biom ass has the highest rank among the RES to generate electricity and a s su ch can ...
    ... Претрага репозиторијума доступна је на www.dr.rgf.bg.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 Abstract ...

  • Analysis of the impact of blasting on construction facilites and environment in the preparation of the tunnel portal Sarlah near Pirot (south Serbia)

    Ravilić Marina, Bogdanović Bojana, Lutovac Suzana, Bajić Sanja, Gaćina Radmila (2015)

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... Figure 1 The X-ray diagram of the sample, which is exposed for 7 days in a humid environment without the addition of binders 3.2.2 The samples were exposed for 7 days in a humidified environment with the addition of hydrated lime, 2, 4 and 6 % (TA-PL2-7, TA-PL4-7 and TA-PL6-7) Samples ...
    ... 1843 3.2.3 The samples were exposed for 7 days in a humidified environment with the addition of cement, 2, 4 and 6 % (TA-PC2-7, TA-PC4-7 and TA-PC6-7) As samples of the hydrated lime, the cement samples also showed a small difference relative to the starting mineral ashes. The biggest differences ...
    ... humid environment with the addition of cement binder: a) 6%, b) 4%, c) 2% 3.2.4 The sample exposed for 28 days in a humid environment without the addition of binders (TA-P-28) A sample of the mixture of fly ash and water after 28 days of exposure was very similar to the sample after 7 days ...

  • Conditions for the occurrence of mega landslides in Serbia and their effect on natural environment

    Sunarić Duško, Jevremović Dragutin, Kostić Srđan (2011)

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn mine Rudnik in Serbia and their possible effects on the environment

    Alena Zdravković, Vladica Cvetković, Aleksandar Pačevski, Aleksandra Rosić, Kristina Šarić, Vesna Matović, Suzana Erić (2017)

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn mine Rudnik in Serbia and their possible effects on the environment

    Alena Zdravković, Vladica Cvetković, Aleksandar Pačevski, Aleksandra Rosić, Kristina Šarić, Vesna Matović, Suzana Erić (2017)

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn Rudnik mine in Serbia and their possible effects on the environment

    Zdravković Alena, Cvetković Vladica, Pačevski Aleksandar, Rosić Aleksandra, Šarić Kristina, Matović Vesna, Erić Suzana (2017)

  • Blasting mats for the protection of people, structures and the environment in proximity to the blast site

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Енергија експлозије која се ослобађа током процеса детонације минских пуњења у бушотинама користи се за дробљење чврсте стенске масе на комаде различитих облика и величина, у зависности од карактеристика стене и оптимизације параметара бушења и минирања. Поред позитивних ефеката минирања, постоје и одређени нежељени ефекти сваког процеса минирања који се могу јавити, а то су: потреси тла, разлетање комада одминираног материјала, ваздушни удари, загушљиви и отровни гасови и прашина. Разлетање комада је неконтролисано избацивање комада одминиране стенске масе и ...
    mecevi za miniranje, pokrivanje, razletanje komada, miniranje

  • Status and tendencies under development and application of underground coal gasification-UCG

    David Petrović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić (2018)
    Podzemna gasifikacija uglja u Svetu poslednjih decenija doživljava znatnu ekspanziju u istraživanju i razvoju zbog uveliko iskorišćenih ležišta uglja i loših ekoloških efekata (pri sagorevanju u TE) na životnu okolinu. Srbija ima znatne rezerve uglja, a kada bi se za PGU koristile samo vanbilansne rezerve i otkopni ostaci bilansnih, jasno je kakvi bi bili ekonomski (a i energetski i ekološki) efekti. U radu su sagledane aktivnosti u Svetu na tom planu, pa smatramo da ima smisla i potrebe za primenu ove ...
    energetika, ugalj, ekologija, gasifikacija

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... using UML and CASE tools that support the development process. The class model of the OpmGIS geodatabase has been developed in the MS Visio tool. The logical model of the geodatabase was transformed to the physical model for the ArcGIS development environment, which is being used at the Faculty of ...
    ... in ArcMap. Figure 6 depicts the development environment of the OpmGIS base with the content of several thematic layers shown on the left side of the panel, and an overlapped visual representation on the right. The background of the map is set to a spatially referenced orthophoto photograph, followed ...
    ... sample analysis, infrastructure within the mine and in its environment, excavating and loading equipment, etc. The physical implementation of the OpmGIS geodatabase model has been illustrated by the example of the "Field G" open pit, followed by an outline of the way spatial-temporal data are handled ...

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn Rudnik mine in Serbia and their possible effects on the environment

    Zdravković Alena, Cvetković Vladica, Pačevski Aleksandar, Rosić Aleksandra, Šarić Kristina, Matović Vesna, Erić, Suzana (2017)

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn mine Rudnik in Serbia and their possible effects on the environment

    Alena Zdravković, Vladica Cvetković, Aleksandar Pačevski, Aleksandra Rosić, Kristina Šarić, Vesna Matović, Suzana Erić (2017)

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... n law If, by blasting in the specific environment, the relative increase in the oscillation velocity of the rock mass and the relative increase of the reduced distance are monitored, then it can be seen that their relations at various levels have approximately the same value (Lutovac, 2010) which ...
    ... explosive amount, and conditions of blasting and geologic characteristics of the soil, being determined on the basis of test blasting for the specific work environment. In this paper, an analysis of the method for the determination of soil oscillation law parameters has been conducted, suggested by Profesor ...
    ... (Trajković et al. 2005). In this manner, the negative effects of blasting are reduced, production efficiency is increased and, at the same time, building structures, mining facilities and the environment near blasting location are protected as well. Parameter determination of soil oscillation ...

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... acquainted with the proper terminology related to that domain both in their mother tongue, and in other languages. Hence the need to integrate terminological resources in e-format into the e-learning environment. The importance of developing both Serbian terminological resources and multilingual ...
    ... export of its subsets to the Moodle e-learning environment. This paper gives an outline of RudOnto, details about Moodle implementation on the Faculty of Mining and Geology, and describes the mechanism for generating Moodle glossaries from RudOnto. Keywords: E-Learning, Terminological resources ...
    ... developed within the IT environment, thesauruses are thus primarily intended for human use. The most complex semantic structure is offered by ontologies, although boundaries set between thesauruses and ontologies in literature differ. Some authors even tend to consider ontologies and thesauruses as ...

  • Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)

    Bechtel Achim, Oberauer Klaus, Kostić Aleksandar, Gratzer Reinhard, Milisavljević Vladimir, Aleksić Nikoleta, Stojanović Ksenija, Groß Doris, Sachsenhofer Reinhard F. (2018)

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn Rudnik mine in Serbia and their possible effects on the environment

    Zdravković Alena, Cvetković Vladica, Pačevski Aleksandar, Rosić Aleksandra, Šarić Kristina, Matović Vesna, Erić Suzana (2017)

  • Products of oxidative dissolution on waste rock dumps at the Pb-Zn mine Rudnik in Serbia and their possible effects on the environment

    Alena Zdravković, Vladica Cvetković, Aleksandar Pačevski, Aleksandra Rosić, Kristina Šarić, Vesna Matović, Suzana Erić (2017)