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Упит dcterms_subject_txt:field data analysis

1270 items

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... and groundwater flow conditions. Based on geologic and hydrogeologic exploration, and analysis and synthesis of the collected data, the paper describes hydrogeologic modeling of the open-cast mine Tamnava – West Field. The software used in the research provides a portrayal of the 3D distribution of the ...
    ... Reserves at Tamnava - West Field of the Kolubara Coal Basin as on 31 December 2009. Kalenić: RB Kolubara. KREŠIĆ, N. (2006) Hydrogeology and Groundwater Modeling. London: CRC Press. KREŠIĆ, N. & MIKSZEWSKI, A. (2012) Hydrogeological conceptual site models; data analysis and visualisation. London: ...
    ... several open-cast mines: Field A, Field B, Field C, Field D, Field E, Field F, Field G, Veliki Crljeni, Šopić-Lazarevac, Tamnava - West Field, Tamnava – East Field, Radljevo, Zvizdar, Ruklade, and Trlić. The paper focuses on the largest active open-cast mine: Tamnava - West Field. A study and conclusions ...

  • Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)

    Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)
    Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...
    Sphene, Phase transition, Raman spectroscopy, X-ray diffraction, SEM, IR

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... ног протока вишег реда  треба  да буде супротан од  доњег знака када је горњи знак исти као знак испред протока кроз дату цев у посматраној  итерацији,  односно  треба  да  буде  иста  као  доњи  знак  када  је  горњи  знак  супротан  од  знака испред протока кроз дату цев у посматраној итерацији.  ...
    ... ситуације  које  могу  да  се  јаве  у  оквиру једног насељеног места. Под овим се подразумева да је сваки тип реалног насеља  који  може  да  се  нађе  у  пракси  придружен  једној  од  тзв.  условних  урбанистичких  површина које се уводе као основна јединица на којој се дати проблем истражује у овом  ...
    ... егативним предзнаком) као на датој слици. Пречници  и дужине цеви се дају у табели 10. Вредности првих претпостављених протока се дају такође на слици, као и у табели.  Кинематски вискозитет воде је 1,0037·10−6 m2 /s, густина воде је 1000 kg/m3 а храпавост цеви је дата као 0,00026 m.     Слика. Во ...

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... ног протока вишег реда  треба  да буде супротан од  доњег знака када је горњи знак исти као знак испред протока кроз дату цев у посматраној  итерацији,  односно  треба  да  буде  иста  као  доњи  знак  када  је  горњи  знак  супротан  од  знака испред протока кроз дату цев у посматраној итерацији.  ...
    ... ситуације  које  могу  да  се  јаве  у  оквиру једног насељеног места. Под овим се подразумева да је сваки тип реалног насеља  који  може  да  се  нађе  у  пракси  придружен  једној  од  тзв.  условних  урбанистичких  површина које се уводе као основна јединица на којој се дати проблем истражује у овом  ...
    ... егативним предзнаком) као на датој слици. Пречници  и дужине цеви се дају у табели 10. Вредности првих претпостављених протока се дају такође на слици, као и у табели.  Кинематски вискозитет воде је 1,0037·10−6 m2 /s, густина воде је 1000 kg/m3 а храпавост цеви је дата као 0,00026 m.     Слика. Во ...

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Sitni, ali bitni: uloga sitnih sisara, herpetofaune i mekušaca u rekonstrukciji pleistocenskih paleosredina

    Katarina Bogićević, Draženko Nenadić, Dragana Đurić, Mihajlo Jovanović, Aleksandra Savković (2023)
    Fosilni ostaci životinja i biljaka imaju važnu ulogu u rekonstrukciji pleistocenskih paleosredina. U ovom radu opisan je značaj tri grupe životinja: sitnih sisara, herpetofaune I mekušaca. Mada je za rekonstrukciju važan sastav čitave asocijacije, nalasci pojedinih vrsta mogu biti dovoljno indikativni da otkriju tip staništa ili klimatske uslove. Posebnu teškoću pri rekonstrukciji paleosredina u Srbiji predstavlja činjenica da klimatske promene na Balkanskom poluostrvu nisu bile tako oštre kao u srednjoj i zapadnoj Evropi, pa ne postoji drastična razlika u ...
    ... važan sastav čitave asocijacije, nalasci pojedinih vrsta mogu biti dovoljno indikativni da otkriju tip staništa ili klimatske uslove. Posebnu teškoću pri rekonstrukciji paleosredina u Srbiji predstavlja činjenica da klimatske promene na Balkanskom poluostrvu nisu bile tako oštre kao u srednjoj i zapadnoj ...
    ... mekušaca mogu se dobiti ı drugi značajni podaci korisni za rekonstrukciju paleosredina, kao npr. da li je neposredno okruženje bilo šumskog, stepskog ili otvorenog tipa (vlažne livade do stepe), da li su to vrste koje ukazuju na močvarnu, rečnu i Jezersku sredinu ili su u pitanju forme koje su ...
    ... shells from successive lineages can provide not only information on seasonal climate variations, but also data on global climate changes. Based on the remains of molluscs, other significant data useful for the reconstruction of palaecoenvironments can be obtained, such as whether the immediate e ...

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... validation and formal analysis, B.M.; All authors have read and agreed to the published version of the manuscript. Funding: This research received no external funding. Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: ...
    ... shadow flicker effect, possible accident situations); and the landscape. Analysis of each of the mentioned territorial impacts is especially important for determining the optimal number and position of wind turbines. This analysis can be partial (the authors use the term “partial” for all assessments ...
    ... can be applied due to data decomposition, this is not usually the case in SEA. In fact, the SEA procedure is car- ried out at the strategic level of planning, or in the initial phase of project development (which is the case for wind farms) when there is usually no exact data that is necessary for ...

  • Multiple-Criteria Decision-Making in Mine Development Planning

    Sanja Bajić (2023)
    The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... Serbia 324 THERMAL SCIENCE: Year 2017, Vol. 21, No. 1A, pp. 323-333 In this paper the review the existing literature in the field of energy security is given, as well as the analysis of thematic framework and dimensions of energy security. The focus is on a single dimension of energy security – availability ...
    ... dimensions of energy security, also known as the four As. So called, the four As has become well known throughout the scientific literature in the field of energy. Many studies have conceptualized energy security by liberally adding or modifying existing model of the four As. Availability and its ...
    ... component of availability is analysed by using selected set of indicators. Analytic hierarchy process (AHP) methodology is proposed and implemented for analysis of obtained indicators, their interactions and specific importance to availability performance. The proposed procedure for availability indicator ...

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... all of them (and also to many other languages). Our data support the hypothesis suggested by Strauss et al. (2008), according to which syllables, as far as models are concerned, behave like words. Syllables in the Serbian text under analysis „mimic“ the behaviour of words with respect to their f ...
    ... full data can be found at rgf.rs/projekti/bil/sk/results/KakoSeKalioCelik_2019 _01_14.xlsx) can be modelled by one of these distributions as well. Table 2. Rank-frequency distribution of syllables in Serbian rank frequency syllable 1 10103 o 2 6970 je 3 5778 u 4 5291 na 5 5248 da 6 4827 ...
    ... normalization constant). As several other Poisson-like distributions also fit the data very well, we postpone any attempts to formulate conclusions that could be deduced from the model and parameter values until data for more languages are available. Stretching the analogy between words and syllables ...

  • The Rift Sequence Stratigraphy of the Itebej Field (Pannonian Basin, Serbia)

    Saša Ivanišević, Jelena Radišić, Ivana Isić, Dejan Radivojević (2019)
    ... Geology, Belgrade, Serbia The exploration area of Itebej field is settled in the vicinity of the eastern edge of the Pannonian Basin (Central Paratethys). The rift sequence stratigraphy interpretation of geological, seismic and well-log data enabled separation of pre-rift, syn-rift and post-rift stages ...
    ... Paratethys, Itebej field, rift sequence stratigraphy, reef sediments, petroleum system References Tari, G., P. Dovenyi, I. Dunkl, F. Horvath, L. Lenkey, M. Ștefănescu, P. Szafian, and T. Toth, 1999. Lithospheric structure of the Pannonian basin derived from seismic, gravity and geothermal data, in The Me ...
    ... south of the Neogene Srpska Crnja Depression (Makó Depression in Hungary, Tomnatec Depression in Romania). The analysis included interpretation of three 3D seismic sections and well data of 33 deep wells. Pre-rift stage is represented by deep-water Late Cretaceous turbidites and Late Jurassic ophiolites ...

  • 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
    ... evident in the diagrams in the field of small- angle 2θ (8 ÷ 15°) and 29 ÷ 30° 2θ. Namely, in the area of small angles, a series of insufficiently defined peaks of very low intensity, which indicate the beginning of crystallization of new phases, according to the data could match the compounds from ...
    ... 725-739. DOI: 10.2298/JSC120716125I [4] SRPS B.H8.359. Methods of analysis of coal and coke - Determination of chemical composition of fuel ash - General requirements. // Belgrade (1973). [5] SRPS B.H8.360. Methods of analysis of coal and coke - Determination of silica (SiO2) in ash from solid ...
    ... solid fuels. // Belgrade (1973). [6] SRPS B.H8.361. Methods of analysis of coal and coke - Determination of barium oxide (BaO) in ash from solid fuels. // Belgrade (1973). [7] SRPS B.H8.362. Methods of analysis of coal and coke - Determination of ferric oxide (Fe2O3) in ash from solid fuels. // ...

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... performed based on available laboratory data for cutting resistance, which was determined by the standard wedge testing procedure that did not include the influence of water pressure at a certain depth at which coal is mined. The bucket-wheel dredger performance analysis so far has recorded a large difference ...
    ... diagram. According to the presented results of laboratory tests and comparative analysis, the suggested methodology of cut- ting resistance testing for underwater coal mining is a reliable basis for determining the necessary data for bucket-wheel dredge rehabilitation. Author Contributions: Conceptualization ...
    ... ation, V.Č.; Methodology, V.Č.; Validation, V.R., S.Ð., and F.M.; Formal analysis, V.R.; Investigation, V.Č. and V.R.; Resources, V.Č. and V.R.; Data curation, V.R., S.Ð., and F.M.; Writing—original draft preparation, V.Č.; Writing—review and editing, V.R.; Visualization, S.Ð. and F.M. All authors ...

  • Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?

    Alena Zdravković, Maja Milošević, Ivana Jelić (2021)
    ... of the number of the replica made, and the type and manner of material that was used for covering. Result and conclusion The data obtained by EDS analysis show that the gypsum model is covered with gold leaf, which was expected according to the macroscopic characteristic of the object ...
    ... (Oxford Instruments). The small amount of the skim was gently removed from the surface and glued onto a graphite strip, without covering. Chemical analysis was performed on unpolished pieces, using the EDS detector and the internal standards. Historic background The gold nugget was mined in ...

  • Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy

    Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana (2021)
    ... 176010. References DJORDJEVIĆ, B. (2013): In: Lugli, F., Stoppiello, A. A. & Biagetti, S. (Eds.): Ethnoarchaeology: Current research and field methods. Conference Proceedings, Rome, Italy. BAR International Series 2472, 49–52. MILOŠEVIĆ, M., DABIĆ, P., KOVAČ, S., KALUĐEROVIĆ, L. & LOGAR ...
    ... was fabricated. By the size and orientation of the pores, it is evident that the pot was manufactured by the application of a mould. SEM-EDS analysis was performed on the inner parts of the walls of the investigated samples and their surface area. When samples are compared slight difference ...
    ... groundmass and pores have a directional appearance, consistent with previous observations, and a slightly higher amount of calcite grains. EDS analysis gives clear differences in the chemistry of the samples. Sample 1 has a higher content of most investigated elements when compared to sample ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... to 500 Da at a rate of 1 s dec-1 and an inter-scan time of 0.1 s. Identification of the organic compounds. The EI+-mass spectra were compared with spectra of reference compounds from mass spectral databases (NIST/EPA/NIH Mass Spectral Library NIST05, Wiley/NBS Registry of Mass Spectral Data, 7th ...
    ... reflect the general state of the water quality. As a relevant parameter, the TOC was determined and the data are given in Table S-I. For a preliminary assessment, a comparison with literature data is useful. The average TOC values for natural water systems were reported as follows: in common ground ...
    ... на стање загађености Саве и Дунава и представља основу за постављање даљих програма мони- торинга. Значајан резултат је да је илустровано како различите хемијске анализе могу да укажу на различите оцене квалитета речне воде. Поређење циљане и нециљане анализе указало је на потенцијално погрешно тумачење ...

  • Development of terminological resources for expert knowledge: a case study in mining

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić (2015)

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • Development and evaluation of fracture gradient curve model: a case study of south-central Kazakhstan

    Branimir Stanisavljevic, Vesna Karovic Maricic, Irena Isakov (2022)
    An accurate fracture gradient value is one of the most important issues in oil and gas well design and drilling. The value of a fracture gradient is a critical parameter for determining the drilling mud weight and selecting the proper depths for setting the casing in the planning process of drilling operations. This paper proposed the new curve model of fracture gradient for the south-central Kazakhstan (central Asia) region based on the analysis of leak-off test and format integrity ...
    gradijet frakturiranja, model nove krive, projektovanje naftne bušotine, Kazahstan