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Упит dcterms_subject_txt:early warning system

700 items

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... problems, or impact on the power plant equipment, or environmental impact. Although each parameter has a dominant impact on one of the listed system segments, the fact is that such variations have a negative impact on all of the listed elements. Coal stacking and reclaiming simulations for ...
    ... variability of coal quality in TZP, determining the geometry should be considered in the context of the other components of the Coal Quality Management System, and not separately. COAL QUALITY Regarding coal quality, an important parameter relates to the quality range of the parameter of interest. ...
    ... larger quantity of coal can be stored in the same area if there are fewer piles, because less space is left between piles. The homogenization stacking system always starts so that at least one pile is completely filled, while another is being emptied. The further course of operations is dependent on ...

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... basic information about drill hole (collar data), complete lithology and assaying data, geotechnical, hydrogeological, geophysical data. This system can perform export of data to the different formats for use with mining and geological software's like Minex. Nevertheless, it was necessary ...
    ... bench and is related to technological capabilities of engaged excavator on the specific bench. Figure 6. presents area of pit bench for I ECC system, discretized on mining block. Figure 6. Bench discretized on mining blocks For all four designed coal benches, the same process is performed ...
    ... are strongly connected. Coal quality control is complex and comprehensive problem which depends of many factors and elements of production system: - geological in situ data should be credible and with sufficient amount, - geological model should provide realistic interpretation of real ...

  • The different approaches in seismic stratigraphy interpretation

    Dejan Radivojević (2018)
    U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.
    seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza
    ... drugog reda i sistemskih grupa niskog nivoa mora (LST-lowstand system tract-crveni stubić), transgresivne sistemske grupe (TST-transgresive sy- stem tract-zeleni stubić) i sistemske grupe visokog nivoa mora (HST-highstand system tract-plavi stubić) (slika 6). U sledećoj fazi postupak iz prethodne ...
    ... facija je prikazan na slici 5 [3]. Hronostratigrafski dijagrami koriste se za prikaz vremenskih odnosa depozicionih sistema i sistemskih grupa (system tract) i njihovog odnosa sa površinama bez sedimentacije. Ove dijagrame moguće je konstru- isati na osnovu seizmičkih podataka, bušotinskih poda- ...

  • Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?

    Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov (2024)

  • Fragmentation Size Prediction of Blasted Material Using a Specialized Software for Drilling and Blasting

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić, Miljan Gomilanović (2024)
    Design and optimizing the drilling and blasting parameters, should fill the requirements for the capacity, fragmentation size, and technical characteristics of loading and transport equipment, and enable a safe work at the open pit. Besides mentioned, it also achieves the minimal impact on the environment of the open pit and decreases the negative effects on the environment, especially in the blast vibration and flyrock. To obtain the best possible blasting effects and consider all the factors, a specialized software is ...
    optimization, O-Pitblast, drilling, blasting, fragmentation size

  • Clockwise rotation in the Serbian segment of the Vardar zone and in the Danubicum of Eastern Serbia - tetonic implication

    Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Tomić (2015)

  • Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia

    Zoran Stevanović, Veljko Marinović, Branislav Petrović (2020)
    У циљу оцене стања животне средине и разумевања потенцијалних узрока још раније евидентираног лошег хемијског статуса водног тела подземних вода „Крш–север“, извршенa je хидрогеолошка проспекција шире околине лежишта бакра Мајданпек, која је укључилаистраживање површинског копа, флотационог језера и главних карстних врела и пећина. Имајући у виду да се експлоатационо поље рудника бакра Мајданпек директно граничи са карстном издани и водним телом подземних вода „Крш–север“, параметри квалитета подземне воде су анализирани (in situ и лабораторијски) на два главна карстна врела ...
    Опасне супстанце, карстна издан, бакар, флотацијско језеро, Мајданпек, Србија

  • Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin

    Filip Anđelković, Dejan Radivojević (2018)
    ... generation. Because of that it is important to use the rift se- quence stratigraphy approach which should led to better understanding of the petroleum system elements. Acknowledgements. The second author wishes to thank the Ministry of Education and Science, Republic of Serbia for supporting this study ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... P. K., Bowen, W. T., Ravelo, A. C., Wilkens, P. W., Farmer, G., Brock, J. and Brink, J. E. (1997). “Estimating Millet Production for Famine Early Warning: An Application of Complimentary Contributor Copy Climate Change and Its Impact on the Growth ofthe Primary Spring Field Crops ... 213 Crop ...
    ... maturity groups - MG (Popović et al., 2018a; 2018b): the very early NS soybean varieties: Gracia, Favorit and NS Kaća (000 MG), the early NS soybean varieties: Fortuna, Merkur, Tajfun and the new variety NS Zoja (00 MG). Medium-early varieties of soybean are: Valjevka, Galina, NS Princeza, NS Vulkan ...
    ... guideline values; • to determine measures to be taken to improve air quality; • toidentify critical and alarming situations with a purpose of warning the public and taking appropriate steps; Complimentary Contributor Copy Mineral Resources of Serbia 47 • assess effects of air pollution on ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... methods were expected. Furthermore, Guo et al. [38] labelled that the MALDI-TOF system offers higher identification accuracy and lower error rates at the species level of wild isolates compared to VITEK2 Compact System. It might be concluded that MALDI-TOF identification has a better quality of base ...
    ... base for the identification of non-clinical isolates than the VITEK2 Compact System. For this reason, but also since the obtained identification by the MALDI-TOF system had mostly high identification scores, MALDI-TOF results were adopted as adequate species-level identification. Using the MALDI-TOF id ...
    ... will be chosen for the next experimental steps. 2.2. The Second Step: Bacterial Strain Identification Primary identification by VITEK® 2 Compact System (BioMérieux, Carpone, France) was performed following standard procedure using VITEK® 2 BCL ID cards (BioMérieux, Carpone, France). Additionally, ...

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... distribution diagram for [Ru(trpy)(bpy)H2O] 2? hydrolytic species is shown in Fig. 3. The complex ion [Ru2(trpy)2(bpy)2(OH)] 3? is present in the system in a pH range between 2.0 and 7.0, with the maximum in concen- tration at pH = 4. This ion is assumed to form through the dimerization of [Ru(t ...
    ... A distribution diagram for [Ru(trpy)(bpy)H,O]?* hydrolytic species is shown in Fig. 3. The complex ion [Ru.(trpy)2(bpy)2(OH)]* * is present in the system in a pH range between 2.0 and 7.0, with the maximum in concen- tration at pH = 4. This ion is assumed to form through the dimerization of [Ru(trpy)(bpy)H ...
    ... present in solution in considerable amounts (Supplementary Material, Fig. 3S). The distribution diagram of the [Ru(trpy)(bpy)- H2O] 2? ? L-His system, shown in Fig. 7, indicates that in highly acidic solution the complex [Ru(trpy) 0.0E +00 1.0E +05 2.0E +05 3.0E +05 4.0E +05 5.0E +05 6.0E ...

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... the ongoing Early Cretaceous convergence between the Europe- derived Dacia Mega-Unit and Adria-derived units of the inner- most Dinarides led to the E-ward subduction of the remaining Neotethys oceanic lithosphere beneath the European upper plate (i.e., the Sava subduction system, Schmid et al. ...
    ... 2020). Coevally, following the Early Cretaceous W-ward subduction and late Early Cretaceous closure of the Ceahlău–Severin Ocean and Carpathians continental collision, the Supragetic Unit was thrusted over the Getic Unit, forming the largest of the E-vergent Dacia Mega-Unit nappes (e.g., Krstekanić ...
    ... to areas at higher distances from it (Fig. 6b). We infer that this dextral overprint is a part of a wider deformation related to the Oligocene–early middle Miocene Cerna and Timok faults of the South and Serbian Carpathians, located to the east and south-east of the study area (Fig. 1b). To the ...

  • Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites

    Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)
    To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...
    Perovskite/spinel ceramics, Multiferroic, Sintering, Influence of synthesis method

  • Komparacija metoda XRF i ICP-MS na uzorcima uglja i produkata sagorevanja

    Branko Kostić, Dejan Prelević, Sabina Kovač, Ksenija Eraković, Dragana Životić (2022)
    Ugljevi niskog ranga – ligniti u Republici Srbiji predstavljaju glavnu energetsku sirovinu koja se koristi za proizvodnju električne energije. Rudarstvo u Srbiji doprinosi bruto dodatoj vrednosti sa 1,8% (2020; https://publikacije.stat.gov.rs/). Sagorevanjem ugljeva niskog ranga u termoelektranama generišu se velike količine elektrofilterskog pepela i pepela, koje često predstavljaju jedan od izvora zagađenja životne sredine usled sadržaja toksičnih elemenata. Dalja upotreba produkata sagorevanja zavisi od njihovog sastava i sadržaja toksičnih mikroelemenata. Svakodnevno sagorevanje lignita u termoelektranama uslovljava konstantan monitoring potencijalno toksičnih ...
    ugalj, produkti sagorevanja, XRF, ICP-MS

  • Maceralni sastav i rang uglja Ibarskog basena

    Željana Novković, Nevena Andrić -Tomašević, Vladimir Simić, Dragana Životić (2022)
    Donjemiocenski ugljonosni Ibarski basen se nalazi u južnoj Srbiji. Intramontanski ektenzivni basen, izdužen u pravcu severozapad-jugoistok ispunjen je slatkovodnim sedimentima koji su formirani kao deo Dinarskog neogenog jezerskog sistema. Paleoreljef basena izgrađen je od paleozojskih amfibolskih škriljaca, sericit-hloritskih škriljaca, krečnjaka, mermera i metabazičnih stena, mezozojskih peščara, laporca, laporovitih krečnjaka, krečnjaka, dolomita, ofiolita i oligo-/miocenskih magmatskih stena. Tercijarne magmatske stene izgrađene su od oligocenskih dacito-andezita i neogenih kvarctlatita/riodacita i piroklastičnih stena. Miocenski sedimenti izgrađeni su od aluvijalnih breča, konglomerata, peščara, ...
    ugalj, macerali, refleksija vitrinita, Ibarski basen

  • Утицај похабаности резних елемената роторног багера на ниво вибрација погона за копање

    Филип Милетић (2023)
    У докторској дисертацији је анализиран утицај похабаности резних елемената роторног багера на потрошњу електричне енергије и ниво амплитуде вибрација погона за копање. Креиран је модел који у функцији стања резних елемената дефинише зависност разматраних физичких феномена. За развој модела примењене су једначине теорије осцилација и Ватметарска метода [1] којом се одређује потрошња електричне енергије. За верификацију модела извршена су мерења на роторном багеру SRs2000.32/5+VR ангажованом на откопавању откривке на површинском копу Тамнава–Западно поље. Обављено је пет мерења. Резни елементи су ...
    роторни багер, резни елементи, хабање, вибрације, потрошња електричне енергије

  • Combining Heterogeneous Lexical Resources

    Cvetana Krstev, Duško Vitas, Ranka Stanković, Ivan Obradović, Gordana Pavlović-Lažetić (2004)
    development of lexical resources, morphological dictionaries, WordNet
    ... the Faculty of Mathematics, University of Belgrade is the development of various lexical resources. Among them the two most important ones are: the system of morphological dictionaries of Serbian (SMD) in Intex format and the Serbian wordnet (SWN) developed in the scope of the Balkanet project. Although ...
    ... Faculty of Mathematics, University of Belgrade is the development of various lexical resources. Among them the two most important ones are: • The system of morphological dictionaries of Serbian (SMD) in Intex format (Silberztein, 2000), that consists of a dictionary of simple lemmas, a dictionary ...

  • WS4LR - a Worksation for Lexical Resources

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović (2006)
    Lexical Resources, Wordnet, Serbian
    ... the described formats and methodologies. The tool operates on the .NET platform and runs on a personal computer under Windows 2000/XP/2003 operating system with at least 256MB of internal memory. 1 Introduction The Human Language Technology group at the Faculty of Mathematics has been developing ...
    ... Considerations WS4LR is written in C#, operates on the .NET platform and can run on any personal computer under Windows 2000/XP/2003 operating system with at least 256MB (preferably 512MB) of internal memory. The solution consists of five projects, the main exe ConvertCP project and four .Net ...

  • Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US

    Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić (2023)
    Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...
    CO2, емисија, угаљ, термоелектрана, САД, ЕУ-27
    ... from coal. The CO» emission was analyzed in relation to the installed capacity, as well as compared to the energy produced and supplied to the system. The analysis of CO» emissions in past few decades and the projection and targets for next 30 years has been showed. The trends in emissions compared ...
    ... emerging, fast-growing Asian economies. This means that coal will probably be the largest single source of carbon dioxide emissions in the global energy system until the end of this decade. It is noticeable that, driven by the challenges of the pandemic and conflict in Eastern Europe, the strong policy ...

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... n 9: Speech-based dialogue system 2. Natural language understanding analyses the syntac- tic structure of a user’s utterance and interprets it ac- cording to the system in question. 3. Dialogue management determines which action to take given the user input and system functionality. 4. Speech synthesis ...
    ... features which make its compu- tational processing a complex task. 3.2.1 Phonetics, phonology, mor- phophonology e vowel system is simple (five vowels), but the conso- nant system is rather complex (twenty five consonants). e vibrant r in somepositions is pronounced as a vowel and functions as a syllable ...
    ... the occasion of ’. In Serbian, there is a well-developed system of personal verb forms for expressing temporal andmodalmeanings (the aspect is the classification category); all these forms are polysemous. One of the features of the verb system is that the construction da + present tense increasingly ...