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Упит dcterms_subject_txt:Global and Planetary Change

2413 items

  • Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS

    Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan (2021)
    Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...
    agregatne zamene, održavanje, mehanizacija, Benefit Cost analiza
    ... analiza Abstract One of the basic tasks on surface coal mines is to achieve adequate time and capacity utilization of continuous systems. To achieve this, it is necessary to make a change to the existing maintenance strategy. The precondition is a timely aggregate replacement of vital parts ...
    ... machines. The benefits are multiple. The expected results of this approach are reducing downtime and increasing operating time; economic savings; better work organization; rationalization of workshop and warehouse capacities; increasing machines value. To introduce aggregate replacement, investments ...
    ... Asset management - Overview, principles and terminology [9] International Electrotechnical Commission. International standard - Dependability management ISO-IEC 300. http://www.iec.ch/ [10] International Electrotechnical Vocabulary, Dependability and Quality of service, IEC Standard 50(191) ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal

  • Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)

    Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)
    Paleontology, Stratigraphy, Ecology, Evolution, Behavior and Systematics

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction
    ... indicating the injection of cold and young, water into the thermal water drainage zone. The pH values also change slightly with depth, showing a decreasing, character. The highest values recorded at the Krupaja Spring, were 7.44, with values of 7.3 at the borehole and 7.16 at the thermal spring. In ...
    ... Project “ Assessment of the impact of climate change on water resources Serbia” (No: TR 37005) and Project “Groundwater Potential and Base for its Sustainable Utilization” (No: OI 176022). Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability ...
    ... Conceptualisation and methodology, L.V. and S.M.; data collection by all authors; data curation, L.V., S.M. and T.D.; software and formal analysis, L.V. and S.M.; writing:— original draft preparation, L.V.; writing—review and editing, L.V., S.M. and T.D.; visualisation, L.V. and S.M.; supervision ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija

  • Стабилизација косине приступног пута површинског копа ћерамиде

    Владимир Чебашек, Вељко Рупар, Јелена Мајсторовић Нецковић, Драгана Нишић, Урош Пантелић (2024)
    У југоисточном делу површинског копа Ћерамиде дошло је до формирања клизног тела у косини насипа приступног пута. Клизно тело се привремено стабилизовало и исто се врло брзо може променити услед повећаних количина падавина и инфилтрације веће количине воде у тело косине чиме би се драстично изменила физичко-механичка својства стенског материјала у телу насипа пута и стенског масива у залеђини косине. Геомеханички услови санације клизишта у телу косине приступног пута су анализирани на основу могућности измене геометрије косине формирањем насипа ...
    габион, префабриковани бетонски елеменати, потпорни зид, косина, површински коп

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia

  • Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine

    Predrag Lazić, Đurica Nikšić, Rudolf Tomanec, Dušica Vučinić, Lidija Cvetićanin (2020)
    У раду је приказан део резултата обимних индустријских испитивања утицаја финоће млевења руде на резултате флотације минерала олова, бакра и цинка из руде рудника "Рудник". На основу резултата индустријских испитивања, констатовано је да се при једностепеном млевењу и двостепеном класирању комплексне Pb-Zn-Cu руде, појављује проблем тзв. диференцијалне мељивости. Наиме, галенит као мек минерал знатно брже се уситњава од осталих минерала у руди. Ово доводи до тога да минерал галенит прелази у ситне класе које споро флотају, а у ...
    флотабилност халкопирита, диференцијална мељивост, флотација, рудник
    ... fractions were determined: +0.508, +0.210, +0.074, +0.038, +0.018, +0.009 and —0.009 mm, as well as minerals and metals distribution in function of particle size [14, 15|. Also, based on results of this research, a change in technological scheme of flotation may be proposed in order to improve the ...
    ... selectivity between copper and zinc minerals. Only 20% of chalcopyrite is in fractions which are suitable to flotation (in range 18—74 nm). Ore specimen 31 (coarse fractions). Chalcopyrite is the most present mineral and pyrrhotite, marmatite and galena follow. Cubanite, vallerite and covellite are present ...
    ... L., Mainza, N., Becker, M., and Wiese, G., Using Mineralogical and Particle Shape Analysis to Investigate Enhanced Mineral Liberation through Phase Boundary Fracture, Powder Techmology, 2016, no. 301, pp. 794—804. 6. Venkataraman, S. and Fuerstenau, F., Kinetic and Energy Considerations in Mixture ...

  • XRD dertermination od hydrothermal phases related to epithermal mineralization in the Čukaru Peki deposit

    Dragana Bosić, Vladica Cvetković, Miodrag Banješević, Kristina Šarić (2024)
    Čukaru Peki, epithermal mineralization, hydrothermal alterations

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • 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

  • Using Lexical Resources for Irony and Sarcasm Classification

    Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković (2017)
    The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...

  • Energetska tranzicija u domaćinstvima: analiza usaglašenosti Srbije sa paketom „Čista energija za sve Evropljane“ / Energy Transition in Households: Analysis of Serbia’s Compliance with the „Clean Energy for All Europeans“ Package

    Boban Pavlović, Aleksandar Madžarević, Dejan Ivezić, Marija Živković, Dušan Mojić (2024)
    Zahvaljujući svojoj složenosti i heterogenosti, sektor domaćinstva predstavlja neizostavnu tačku u politikama energetske tranzicije. U Evropskoj uniji, potrošnja energije u domaćinstvima čini oko 26% finalne potrošnje energije, dok u Srbiji ovaj sektor ima najveći udeo u finalnoj potrošnji, što čini oko trećinu finalne potrošnje. Primenom mera energetske efikasnosti moguće je ostvariti značajne energetske uštede, što zajedno sa smanjenjem i supstitucijom upotrebe fosilnih goriva vodi manjem doprinosu klimatskim promenama i značajnom smanjenju zagađenja vazduha. Paket zakonskih mera “Čista energija za ...
    energetska tranzicija, paket čiste energije, regulatorni okvir, energetska politika, domaćinstva, srbija

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)

  • Back-arc underplating provided crustal accretion affecting topography and sedimentation in the Adria microplate

    Paolo Mancinelli, Vittorio Scisciani, Cristina Pauselli, Gérard M. Stampfli, Fabio Speranza, Ivana Vasiljević (2021)
    Supported by evidence of deep crustal sources for the observed magnetic anomalies in Central Italy and by outcropping gabbros in the Croatian archipelago, we model the observed gravity and magnetic anomalies in the Central Adriatic Sea and surroundings. We suggest that the major magnetic anomalies in the area are related to a wide underplating and propose that this volume represents the first stage of the back-arc Adria continental breakup in Early Permian times. During the Palaeotethys-Adria collision, underplating has ...
    Underplating, akrecija kore, Magnetske anomalije, Jadranska ploča
    ... shallow depths, but a rapid change in the geodynamic context has stopped rift comple- tion between Early and Middle Permian. We suggest that this event is the opening of the westernmost Neotethys branch that sets the stage to close the gap between the Apulia s.str. and Adria s.str. microplates to form ...
    ... Italy): markers of the late Triassic change from orogenic-like to Anorogenic magmatism. J. Petrol. 1–36. https://doi.org/10.1093/petrology/egz031. Cassinis, G., Cortesogno, L., Gaggero, L., Perotti, C.R., Buzzi, L., 2008. Permian to Triassic geodynamic and magmatic evolution of the Brescian Alps ...
    ... (Eds.), Ancient Orogens and Modern Analogues, vol. 327. Geol. Soc. London Spec. P., pp. 89–111 Stampfli, G.M., Hochard, C., Vérard, C., Wilhem, C., von Raumer, J., 2013. The formation of Pangea. Tectonophysics 593, 1–19. Stein, S., Sella, G., 2005. Pleistocene change from convergence to extension ...

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... of preventing environmental damage and also for humans. Mineral and coal mining often increases soil density, erosion, sedimentation, landslides, disruption of flora and fauna, and disruption of public health, which leads to microclimate change (Goudie and Viles, 2013). The post-mining impacts ...
    ... l damage and create environmental justice issues, which have become a global concern (Preston, 2018). Reclamation forces mining companies to restore the caused environmental losses. Land reclamation aims to repair the damage to post-mining ecosystems by improving soil fertility and planting lands ...
    ... development of organizational and economic infrastructure. AUSTRALIA In Australia, for example, individual states and territories are responsible for mining, rehabilitation, and mine closure, including the adoption of individual laws, regulations, and guidelines. Industry and government agencies have ...

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation
    ... libraries of e-journals”, in Eighth International Conference on Language Resources and Evaluation (LREC ‘12), Istanbul, Turkey. Stojanovic, L.J., Stojanovic, N. and Apostolou, D. (2005), “Change management in e-government: OntoGov case study”, Electronic Government, an International Journal, Vol. 3 No ...
    ... of e-journals”, in Eighth International Conference on Language Resources and Evaluation (LREC ‘12), Istanbul, Turkey. Stojanovic, LJ., Stojanovic, N. and Apostolou, D. (2005), “Change management in e-government: OntoGov case study”, Electronic Government, an International Journal, Vol. 3 No. 1, pp. 74-92 ...
    ... Mining and Geology and Chief of Chair for Mine Planning and Design. He holds MSc and PhD degree in Mining Engineering, and he has published four books and over 70 papers related to mining technology, mine planning, finance and investment. His expertise extends to mining technology, economics and mine planning ...

  • In silico and in vitro biological evaluation: distribution of Ru(III) Schiff base complexes through the pancreatic 3D model and immersed blood vessel network

    Milica Međedović, Dušan Ćoćić, Aleksandar Mijatović, Vladimir Simić, Žiko Milanović, Marijana Kosanić, Nevena Petrović, Snežana Sretenović, Ana Rilak Simović (2024)
    Ru kompleksi, HAS, Bcl-2, antimikrobni
    ... radical (0.05 mg/mL) and 1mL of test samples (1000, 500, 250, and 125 ug/mL) were placed in cuvettes. The mixture was shaken vig- orously and allowed to stand at room temperature for 30 min. DPPH solution is initially violet, which fades when antioxidants donate hydrogen. The change in color is moni- ...
    ... The inoculated plates were incubated at 37"C for 24h for bacteria and 28"C for 72h for fungi. The MIC was determined visually and defined as the lowest concentration of tested compounds that prevented resazurin color change from blue to pink. For fungi, the MIC values of the tested substance ...
    ... Pavan Jukić, C. Rotim, P. Trebše, A. Starc. Acta Clin. Croat., 58, 726 (2019). C. Vicol, G. Duca. In Fundamental and Biomedical Aspects of Redox Processes, pp. 224-249. IGI Global, United States (2023). Ž. Milanović, M. Antonijević, E. Avdović, V. Simić, M. Milošević, Z. Dolićanin, M. Kojić, Z ...