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Упит dcterms_subject_txt:mathematical content

485 items

  • The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments

    Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)
    The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...
    sediments, Tisza River, organic matter, biomarkers, oil pollutants
    ... SEDIMENTS 601 TABLE II. Group organic–geochemical parameters; Corg – total organic carbon content; db – dry basis; HC – hydrocarbons; NSO – polar compounds containing nitrogen, sulphur and oxygen Sample Content of Corg, % db N, %, db S, % db Bitumen, % Saturated HC, % Aromatic HC, % NSO, % ...
    ... a promising tool for the determination and identification of petroleum pollutants in soils, recent sediments, ground and surface waters.3,4 The content of singen- etic organic matter in recent sediments varies over a wide range from 0 to 80 %2 and therefore can not be used as an indicator of the origin ...
    ... quartering. Elemental analysis was performed to determine the contents of total organic carbon (Corg), sulphur and nitrogen. The total organic carbon content was determined after removal of carbonates with 1:3 diluted hydrochloric acid. The measurements were realized using a Vario EL III, CHNS/O elemental ...

  • Preparation of Multimedia Document “YU Rock Scene”

    Milena Obradović, Aleksandra Arsenijević, Mihailo Škorić (2017)
    SUMMARY: This study will present the preparation process of a multimedia document entitled YU ROCK SCENE in which participants were senior students of undergraduate studies of the Department of Library and Information Science at the University of Belgrade Faculty of Philology during the academic year 2014/2015, as a part of the subject Multimedia Documents. This study gives an overview of the historical development of rock and roll in the territory of the former Yugoslavia, rock scene in Yugoslav republics, ...
    multimedia document, library science, information science, rock and roll, music, Yugoslavia
    ... choice dynamically generate proper HTML content. First script, mapa.php, shows the map of Yugoslavia with proper borders and capitals. Sections of the map are also links to rep.php script along with proper parameter forwarding. The rep.php script shows the content for one specific region (or republic) ...
    ... Yugoslavia, was primarily formed by professions from radio, film, theatre and press. The programmes followed newspapers in creation of televi- sion content, as well as the development of technology. Drama series, documentaries Infotheca Vol. 16, No. 1–2, August 2016 119 Obradović M., et. al, “YU Rock ...
    ... Infotheca Vol. 16, No. 1–2, August 2016 123 Obradović M., et. al, “YU Rock Scene”, pp. 111–127 As there are many possible outcomes of the pages content, it is necessary to find them an appropriate theme (color) to share. Main color was chosen to be a shade of red (\#dd2233), with strawberry themed ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... (core), and spessartine (rim) components. Calcium content is uniform and stable in the core and rim, although the core contains small inclusions of epidote, quartz and rarely spha- lerite. Andradite-rich zone (rim) displays increased Mn and Ti content in comparison with the grossular-rich phase (core) ...
    ... 08 Dimitrijević M.N. & Dimitrijević M.D. 1987: The Turbiditic Basins of Serbia. Serbian Academy of Sciences and Arts Department of Natural & Mathematical Sciences, Belgrade, 1–304. Dimitrijević M.N. & Dimitrijević M.D. 2009: The Lower Cretaceous paraflysch of the Vardar zone: composition and fabric ...
    ... metasomatized by crustal material (Cvetković et al. 2004, 2014; Prelević et al. 2005). This trigger produced volcanic activity with elevated potassium content in the Miocene, in some parts of the Adria–Europe suture zone (Prelević et al. 2005). The Cretaceous sediments in the vicinity of Rudnik Mt. ...

  • Creation of a Training Dataset for Question-Answering Models in Serbian

    Ranka Stanković, Jovana Rađenović, Maja Ristić, Dragan Stankov (2024)
    Razvoj i primena veštačke inteligencije u jezičkim tehnologijama značajno su napredovali poslednjih godina, posebno u domenu zadatka odgovaranja na pitanja (Question Answering - QA). Dok su postojeći resursi za QA zadatke razvijeni za glavne svetske jezike, srpski jezik je relativno zanemaren u ovoj oblasti. Ovaj rad predstavlja inicijativu za kreiranje obimnog i raznovrsnog skupa podataka za obučavanje modela za odgovaranje na pitanja na srpskom jeziku, koji će doprineti unapređenju jezičkih tehnologija za srpski jezik. Pored brojnih istraživanja o jezičkim modelima ...
    veštačka inteligencija, obrada prirodnog jezika, jezički resursi, anotirani skupovi, ekstrakcija informacija, odgovaranje na pitanja

  • Geomagnetna bura kategorije G5 u maju 2024. godine

    Magdalena Marčeva (2024)
    Zemlja poseduje magnetno polje, koje je generisano u njenom spoljašnjem jezgru. Magnetno polje Zemlje je konstantno izloženo dejstvu sunčevog magnetnog polja i zračenja koje se sa Sunca emituje. Naelektrisane čestice koje pristižu sa Sunca stupaju u interakciju sa magnetosferom, što dovodi do različitih geomagnetnih poremećaja.Geomagnetna aktivnost direktno je proporcionalna intenzitetu sunčevog zračenja koje dolazi do Zemlje. Pod uticajem sunčevog korpuskularnog zračenja dolazi do pojave geomagnetnih bura koje su praćene porastom intenziteta magnetnog polja.Količina i jačina dolaznog sunčevog zračenja zavisi ...
    magnetosfera, sunčevo zračenje, geomagnetna bura, indeksi geomagnetne aktivnosti, polarna svetlost
    ... 4Auroralni oval iznad severnog pola ( https://satlib.cira.colostate.edu/wp-content/uploads/sites/23/2024/05/nhem-aurora- labels.png ) 19 Slika 5.3.2. 4Auroralni oval iznad južnog pola https://satlib.cira.colostate.edu/wp-content/uploads/sites/23/2024/05/shem-aurora-labels.png Solarni flerovi tj ...
    ... magnetna polja, koja se potom međusobno prepliću i pojačavaju (slika 2.1.3). Slika 2.1.3. Lokalna magnetna polja Sunca (https://www.u-tokyo.ac.jp/content/400021919.jpg) Bipolarna magnetna oblast može da bude određena sa 2 zatamnjene oblasti, koje se zovu sunčevim pegama, koje imaju suprotnu polarnost ...
    ... Weather, 2024). Slika 5.1.1. Solarne baklje 8. maja (levo) i 7.maja (desno) (https://images.foxweather.com/static.foxweather.com/www.foxweather.com/content/uploads/2 024/05/668/376/May-7-8-2024-SDO-131-Dual-A4ctive-Regions-bigger-1.gif?ve=1&tl=1) U četvrtak, 9. maja 2024.godine, NOAA centar za svemirsku ...

  • Epidotizacija sanidina u kvarclatitima Grota

    Danica Srećković-Batoćanin, Suzana Erić, Nikola Novičić, Nikola Pašajlić, Natalija Batoćanin (2023)
    Propilitska alteracija je veoma česta u gornjokredno-tercijarnim vulkanitima Srbije. Kvarclatiti Grota, otkriveni na dubini od oko 550 m u jednoj od istražnih bušotina su holokristalaste porfirske strukture sa fenokristalima sanidina dimenzija i do 1,5 x 2 cm. Optičkim ispitivanjima su u kvarclatitu potvrdjeni i elementi sitaste, pojkilitske i glomeroporfirske strukture. Kao fenokristali prisutni su sanidin, plagioklas, kvarc, biotit i amfiboli. Sekundarni minerali su hlorit, epidot, coisit, Fe-hidroksidi, redak kalcit i ilit. U fenokristalima sanidina se zapažaju „lepeze“ izduženih kristala ...
    Grot, kvarclatiti, sanidin, epidot

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... geodatabase. ArcGIS, namely, offers possibilities for importing data from traditional relational databases, XML and Excel documents, as well as vector content of AutoCAD and other CAD software. In the case of raster data, there are also possibilities for import of various formats, as well as for grouping ...
    ... the BpUBS database [Gojak et al., 2011] and by direct import 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 ...
    ... ta u Beogradu, 2006. ISBN 86-7518-070-5. [2] ESRI, [2010]. Introduction to CASE Tools. [Online] 2010. www.esri.com http://resources.arcgis.com/content/building-geodatabases-case-tools [3] Gojak Z., Mitrović S., Stanković R., Kitanović ., [2011]. BPUBS: informacioni sistem za istražne radove ugljenih ...

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?

    Стефан Петровић, Наталија Батоћанин (2020)
    У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...
    Рудник, Брђани, харцбургити, серпентинити, талк
    ... olivine and orthopyroxene suggest on serpentinization process under the action of aqueous solutions whose temperature was below 400°C. The low alumina content (0.00-0.03 a.p.f.u.) supports such statement. In harzburgites from Rudnik, in respect to those from Brdjani, prevails secondary talc of almost ideal ...
    ... dykes and shallow intrusions. According to coexisting forsterite and talc, the temperature of fluids had to be at least 490°С. The elevated alumina content (>3 a.p.f.u.) in serpentine supports such statement. Are such talcized peridotites indicative for the vicinity of acid igneous bodies remained an ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... sum is a waste product of the phosphoric acid manu- facturing process. It is produced in the form of a fine powder with a large calcium sulfate content. This process produces ~5 tons of phosphogypsum for every ton of phosphoric acid manufactured (Hammas eft al., 2013). According to the International ...
    ... supernatant. Although the solubility of brushite is a twelfth of that of gypsum, the recrystallization did not affect significantly the phosphorus content. This may be indicative of: (1) other P-bearing phases being present; (2) replacement of SOŽ with HPO?T within the crystal structure of gypsum; or ...
    ... of the WI to 80.5% after the recrystallization is in accordance with the ICP-OES and SEM-EDS analyses, which showed a significantly smaller Fe content in the purified gypsum. This increase in the WI benefits the potential use of recrystallized phosphogypsum in various industries. For example, in ...

  • Bilingual lexical extraction based on word alignment for improving corpus search

    Jelena Andonovski, Branislava Šandrih, Olivera Kitanović (2019)
    Library and Information Sciences,Computer Science Applications

  • Epidotized sanidine in quartzlatites from Grot

    Danica Srećković-Batoćanin, Suzana Erić, Nikola Novičić, Nikola Pašajlić, Natalija Batoćanin (2023)
    Propilitska alteracija je veoma česta u gornjokredno-tercijarnim vulkanitima Srbije. Kvarclatiti Grota, otkriveni na dubini od oko 550 m u jednoj od istražnih bušotina su holokristalaste porfirske strukture sa fenokristalima sanidina dimenzija i do 1,5 x 2 cm. Optičkim ispitivanjima su u kvarclatitu potvrdjeni i elementi sitaste, pojkilitske i glomeroporfirske strukture. Kao fenokristali prisutni su sanidin, plagioklas, kvarc, biotit i amfiboli. Sekundarni minerali su hlorit, epidot, coisit, Fe-hidroksidi, redak kalcit i ilit. U fenokristalima sanidina se zapažaju „lepeze“ izduženih kristala ...
    Grot, kvarc latiti, sanidin, epidot

  • 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

  • Towards Automatic Definition Extraction for Serbian

    Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić (2021)
    U radu su prikazani preliminarni rezultati automatske ekstrakcije kandidata za definicije rečnika iz nestrukturiranih tekstova na srpskom jeziku u cilju ubrzanja razvoja rečnika. Definicije u rečniku Srpske akademije nauka i umetnosti (SANU) korišćene su za modelovanje različitih tipova definicija (opisnih, gramatičkih, referentnih i sinonimskih) koje imaju različite sintaksičke i leksičke karakteristike. Korpus istraživanja sastoji se od 61.213 definicija imenica, koje su analizirane korišćenjem morfoloških e-rečnika i lokalnih gramatika implementiranih kao pretvarači konačnih stanja u paketu za obradu korpusa otvorenog ...
    ... they should be used whenever possible. A lexicographic definition is the identification of the semantic content of a certain lexeme, with relevant elements of realization. The semantic content consists of an archiseme, which carries information about the lexeme belonging to a wider lexical-semantic ...
    ... years now, and their current size and content ensure successful use in different real-world applications in the field of Serbian language processing. These dictionaries contain automatically generated word forms of more than 200,000 lemmas2, and their content covers both general vocabulary and proper ...
    ... dialectal and domain properties, followed by the codes of its possible morphosyntactic realization. Finite state transducers (FSTs) are abstract mathematical constructions that allow modelling of local grammars to describe some linguistic constructions, for example, noun phrases. A finite state transducer ...

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... tion enriched by gold [13] show only minimal variations in unit cell dimensions, diai and composition, i.e., As:S ratio, with a calculated As content close to its theoretical value of 33.3 at.% [14] (Figure 1c). Arsenopyrite from other investigated localities are close to the theoretical value ...
    ... four samples from Drenjak shows only slight variations in unit cell dimensions, diyai, and composition, i.e., As:S ratio. The calculated arsenic content is close to its theoretical value of 33.3 at.%; therefore, it can be said that the examined arsenopyrite from Drenjak shows almost ideal stoichiometry ...
    ... stoichiometry. Crystals 2023, 13, 278 5of1l1l 100 nm Otherwise, the As:S ratio in arsenopyrite can vary significantly, resulting in the As content ranging from less than 30 to 38.5 at.% [14]. Due to their homogeneity, absence of zoning, and stoichiometric composition, the samples from the Drenjak ...

  • Pre-failure deformation monitoring as rockfall prediction tool

    Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić (2021)
    General Engineering
    ... IOP Conf. Ser.: Earth Environ. Sci. 833 012197   View the article online for updates and enhancements. This content was downloaded from IP address 147.91.1.41 on 23/09/2021 at 11:35 Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution ...
    ... detect reflectivity of the target point, as potentially valuable information in rock slope analysis (surface rock type, weathering degree water content might be correlated). These angular and distance measurements allow accurate reconstruction of each target point spatial coordinates (X,Y,Z) in respect ...

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)
    ... texts in the same language, which in general also have the same content, be- cause they were generated by translating the same original, but which are not identical. Finally par- allel texts can consist of several texts of the same content in several languages. Such parallel texts originate from one ...
    ... whereas the other is generated as its transla- tion. Thus, the majority of parallel texts are bi- lingual, namely, composed from two texts of the same content in two different languages. How- ever, parallel texts can also be generated in other ways. Namely, when fiction is concerned, it often happens that ...
    ... 3 WS4LR – a tool for maintenance and integrated use of lexical resources With the growth of the number of resources as well as their volume and content, a need emerged for the development of software tools which would alleviate their maintenance, use and inte- gration and enable their further development ...

  • 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
    ... At all other locations, the content of Cr did not exceed the intervention value but were above the target values and indicated contamination. Hence, a risk for the aquatic environment has to be assumed, but an intervention is not required. With respect to the Cu content, the Danube sediments at the ...
    ... for analyses due to their abundance and toxic effects in the environment of highly industrialized and urbanized areas. The determination of total content of heavy metals in sediments is particularly useful to collect infor- mation on the genesis of the soil and on the level of contamination. The trace ...
    ... presented in Table S-IV. The given concentrations are in a standard type of sediment with 10 % organic matter and 25 % clay. Since the TOC and clay content of the investigated sediments may vary and differ significantly, the employment of these values is partially res- tricted. The soil remediation i ...

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci