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Упит dcterms_subject_txt:field data analysis

1282 items

  • 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 ...

  • 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 ...

  • 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 ...

  • 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

  • Polyhedral characteristics of the cosalite-type crystal structures

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)
    kristalna struktura, kozalit, poliedarske karakteristike

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... archiving of geologic data, and provide a modern and effective in- formation basis for carrying out all activities related to planning, design and decision-making in the field of geology. Within the project a web portal3 was established that allows quick and easy access to geological data and information ...
    ... consideration: title, field, keywords, and abstract, while for location criterion other fields are searched: municipality, county, name of the cartographic sheet, location and chronological number of the document, and the sheet signature. The search system takes into account the field where the keyword was ...
    ... 1. Thus, if search is performed with the location criterion Bor, documents in which Bor occurs in Municipality field will be better ranked than those in which it occurs in the Abstract field. The ranking of results is performed in descending order according to the total sum of the product of weight factors ...

  • 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

  • Human Hemoglobin and Antipsychotics Clozapine, Ziprasidone and Sertindole: Friends or Foes?

    Lena Platanić Arizanović, Nikola Gligorijević, Ilija Cvijetić, Aleksandar Mijatović, Maja Krstić Ristivojević, Simeon Minić, Aleksandra Nikolić Kokić, Čedo Miljević, Milan Nikolić (2023)
    Packed with hemoglobin, an essential protein for oxygen transport, human erythrocytes are a suitable model system for testing the pleiotropic effects of lipophilic drugs. Our study investi gated the interaction between antipsychotic drugs clozapine, ziprasidone, sertindole, and human hemoglobin under simulated physiological conditions. Analysis of protein fluorescence quenching at different temperatures and data obtained from the van’t Hoff diagram and molecular docking indicate that the interactions are static and that the tetrameric human hemoglobin has one binding site for ...
    Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Computer Science Applications, Spectroscopy, Molecular Biology, General Medicine, Catalysis

  • High-resolution sequence stratigraphy of carbonates - theory and examples

    Jelena Stefanović, Dejan Radivojević (2020)
    Циљ рада је да кроз теоријски аспект и примере примене представи секвенциону стратиграфију високе резолуције карбонатних седимената. У том смислу први део се односи на појам и значење високе резолуције у секвенционој стратиграфији. Од временских и просторних скала које одговарају сеизмичким профилима у последњих двадесет година метода је нашла примену на скалама које одговарају бушотинским подацима или изданцима. Као најпогоднији седименти за овај тип истраживања су се показали карбонати јер су осетљиви на еустатичке промене, а основе секвенционе стратиграфије ...
    изданак, системска група, јура-креда, карбонатна платформа, плитководна средина
    ... фабрика“ престаје да функционише, а даљим спуштањем нивоа воде може доћи до субаерске ерозије. У случају када ниво мора расте повећава се акомодациони простор и стварају се услови за већу продуктивност. Наравно, условљеност да се простор депозиције налази у фотичкој зони потиче од чињенице да се депозиција ...
    ... unit for stratigraphic analysis. In: In: Payton, C.E. (Ed.), Seismic Stratigraphy - Applications to Hydrocarbon Exploration, vol. 26. American Association of Petroleum Geologists, Memoir, pp.53–62. POMONI-PAPAIOANNOU, F. and KARAKITSIOS, V., 2016. Sedimentary facies analysis of a high- frequency ...
    ... ј стратиграфији, услед одређених недоумица поставља се питање да ли је уопште могуће увести један униформан општи модел. У поједностављеном облику модел је приказан на Слици 1, и ослања се на промену нивоа мора у функцији времена. Да би се лакше одредиле фазе које су везане за процесе трансгресије ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... treatment. After preparation, samples were characterized in details. Different techniques were used: x-ray powder diffraction analysis, Raman spectral analysis, elemental analysis, and determination of textural and morphological properties. Obtained results showed dependence of investigated properties and ...
    ... treatment. After preparation, samples were characterized in details. Different techniques were used: x-ray powder diffraction analysis, Raman spectral analysis, elemental analysis, and determination of textural and morphological properties. Obtained results showed dependence of investigated properties and ...
    ... 3.1.2. Elemental Analysis The contents of organic C, N, O and H in glucose and fructose samples obtained after hydrothermal treatment and activation with different hydroxides were determined by elemental analysis and the results are listed in Table 1. Table 1. Elemental analysis of the glucose and ...

  • Хидрогеохемијске карактеристике и квалитет вода слива Требишњице, Република Српска, Босна и Херцеговина

    Dragoslav R. Banjak (2016-08-25)
    Упркос неповољном временском и просторном распореду, воде су најзначајнијиприродни ресурс Источне Херцеговине. Ова чињеница довела је до реализацијепројекта „Вишенамјенског хидросистема Требишњица“, којим је, премаМилановићу (2006), до сада обухваћено: седам хидроелектрана, шестакумулација, шест брана, шест тунела укупне дужине 59,7 km, неколикоприступних тунела, 62,5 km бетонског канала кроз Попово поље, канал крозДабарско (6750 m) и Фатничко поље (2770 m) и систем тунел-канал или цјевоводпрема Дубравама.У почетку са доминантним енергетским предзнаком, концепција јетрансформисана у интегрално рјешење вишенамјенског коришћења и заштитевода и животне ...
    хидрогеохемијски процеси, мултиваријантна статистичкаанализа, инверзно геохемијско моделовање, квалитет воде, употребиљивост водеза наводњавање, слив Требишњице
    ... the Use of Exploratory Factor Analysis in Psyhological Research, Psyhological Methods, Vol 4, No3, Pages 272-299 72. Field A. (2009), Discovering Statistics Using SPSS, SAGE Publications LTD, London. 73. Helsel D.R, Lee L. (2006), Analysis of Environmental Data with Nondetects, ASA Workshop ...
    ... добијених генерисањем (Pallant, 2011). У табели 44. дати су резултати паралелне анализе својствених вриједности добијених у току анализе главних компненти, и вриједности добијених примјеном софтвера Monte Carlo PCA for Parallel Analysis. С обзиром да прва четири фактора имају већу стварну сопствену ...
    ... састава вода у подсливу Мушнице У табели 50. дати су резултати паралелне анализе својствених вриједности добијених у току анализе главних компненти, и вриједности добијених примјеном програма Monte Carlo PCA for Parallel Analysis. С обзиром да пет фактора имају већу стварну сопствену вриједност ...

  • Multi-word Expressions for Abusive Speech Detection in Serbian

    Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev (2020)
    Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...
    uvredljiv govor, govor mržnje, leksički izvori, višejezični leksikon, izrazi sa više reči
    ... creativecommons.org/licenses/by/4.0/. 75 publicly available resources, Hurtlex, that we base our work on, is introduced in Subsection 2.2. The analysis and improvement of Hurtlex for Serbian is given in Subsection 3.1. Overview of acquiring, describing and classifying the additional dataset is given ...
    ... and other corpora previously compiled. The distribution of MWEs by part of speech categories of their trigger word is presented in Table 3. Further analysis showed that 45% of trigger words yielded no MWE marked as abusive, 19% had less abusive than MWEs categorized as not abusive or potentially abusive ...
    ... expressions the most frequent are those with a structure V N (289), followed by V PREP N (124), V PRO N (52), V N PREP N (40). Again, this is a rough analysis because each group may contain syn- tactically very different expressions. For instance, the V N group contains besides frozen expressions, e.g. ode ...

  • 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
    ... electricity production. Also, this paper provides date and analyses of electricity generation 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 ...
    ... a new record value of 36.8 Gt [2]. This assessment is based on a detailed regional sectoral and energy analysis, including the most recent official national statistics publicly available data on energy use, economic indicators, and climatic features. The pandemic impact and geopolitical moment ...
    ... Our World in Data based on BP Statistical Review of World Energy, 2022, available at: https://ourworldindata.org/energy#explore-data-on-energy [11] OWID ED, Our World in Data based on Ember's Yearly Electricity Data, 2023, available at: https://ourworldindata.org/energy#explore-data-on-energy ...

  • Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije

    Jelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar (2023)
    Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...
    mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacija

  • Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji

    Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković (2023)
    U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...
    površinska eksploatacija ugalja, lignit, Kolubara, Kostolac, Srbija

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... SW Serbia (GAWLICK et al., 2017 and references therein) have been focused on the litho- and microfacies analysis, and biostratigraphic analysis of the components of the mélanges. Based on the data obtained, GAWLICK et al. (2017, p. 4) con­ cluded: “The ophiolite and distal continental margin nappes ...
    ... precise due to poor preservation of the radiolarians. During the 2015 field season, we studied the reference sec­ tion of the Ljubiš Formation (sensu GAWLICK et al., 2017) in Djokov Potok, and present here the first biostratigraphic data from these sedimentary rocks based on radiolarians. 2. GEOLOGICAL ...
    ... (YAO), H. tetraspinus (YAO). Taking into account previous data from the upper part of the Ljubiš Formation, the age of the formation can be estimated to be in the interval from the ?Bajocian to Bathonian-Oxfordian. The new biostratigraphic data clearly show the onset of tectonic motion in the Middle ...

  • Permanent GNSS monitoring of landslide Umka

    Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović (2020)
    Клизиште Умка је једно од највећих насељених активних клизишта у Србији. Активност клизишта Умка се прати већ више од 85 година, различитим геотехничким и геодетским техникама. Од 2010. године, активност kлизишта се континуирано прати у реалном времену аутоматизованим перманентним системом за праћење базираним на Глобалним навигационим сателитским системима (ГНСС). Поред тога, од 2018. године активност клизишта се додатно прати кинематичким ГНСС одређивањем положаја скупа карактеристичних тачака као и применом UAV фотограметрије. Главни циљ овог рада је приказ резултата опажања три ...
    клизиште, перманентно праћење, ГНСС
    ... repeatability. An observation epoch requires greater manpower engaged on the field and minimum five geodetic class GNSS receivers, which represents financial, logistical and often technical challenge. After the analysis of the dynamics of the Umka landslide, it is concluded that the third observation ...
    ... sional positioning of characteristic landslide points. The data obtained using this methodology represent very reliable monitoring results with a high density of points from which it is possible to perform more detailed analysis for the entire landslide area. Precision of the observations and ...
    ... MONITORING OF LANDSLIDE UMKA 1. INTRODUCTION Over the past two decades, driven by the development of geodetic instruments for data acquisition and technology for data processing in real time, a wide range of different types of complex monitoring automated systems found its use in various engineering ...

  • The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)

    Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov (2019)
    Geography, Planning and Development,Aquatic Science,Biochemistry,Water Science and Technology
    ... 2.85 ∆S (m)/PP-3 3.18 43.03 42.14 2.85 However, despite the fact that the greatest changes were detected at observation well PP-3, a comparative analysis of that well and PP-1 indicated that the groundwater level largely depended on the operating regime of the tunnel. Parallel plots showed different ...
    ... environment. In addition, synchronous measurements served to identify the tunnel sections where water level changes were particularly pronounced. The analysis of the total water losses from the tunnel showed that they were relatively acceptable and that their distribution along the tunnel was not uniform ...
    ... surface flow in conveyance tunnel. Tunn. Undergr. Space Technol. 2012, 28, 212–217. [CrossRef] 7. Hassani, A.N.; Katibeh, H.; Farhadian, H. Numerical analysis of steady-state groundwater inflow into Tabriz line 2 metro tunnel, northwestern Iran, with special consideration of model dimensions. Bull. Eng ...