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Упит dcterms_subject_txt:Time series

334 items

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)
    ... d by series of orphan aromatic hopanoids (bearing an ethyl group at C-21), with one to four aromatic rings. The presence of diterpenoids (Di) and non-hopanoid triterpenoids (Tri) in relatively high concentrations in all samples shows that both gymnosperms and angiosperms contributed to the ...
    ... maturity has no significant impact on biomarker distributions. Therefore, the objective of the study is to examine the potential of biomarkers to distinguish Lower and Middle Miocene lignites in relation to sources and depositional environment of organic matter (OM). Lignite samples were collected from ...
    ... Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia I. Kojic, J. Kus, D. Zivotic, K. Stojanovic Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The Potential of Biomarkers to Distinguish Lower and ...

  • Using English Baits to Catch Serbian Multi-Word Terminology

    Cvetana Krstev, Branislava Šandrih, Ranka Stanković (2018)
    In this paper we present the first results in bilingual terminology extraction. The hypothesis of our approach is that if for a source language domain terminology exists as well as a domain aligned corpus for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a ...
    aligned texts, word alignment, terminology extraction, electronic dictionaries, morphological inflection
    ... same approach to other domains – min- ing, electro-distribution and management – since aligned domain corpora have already been prepared. At the same time the presented system will be improved with the user friendly interface for presentation of the results. Our in- tention is also to revise and further ...
    ... ov aj bi bl io te čk i in fo rm a- ci on is is te m bi bl io te čk i in fo rm a- ci on is is te m li br ar y in fo rm at io n sy s- te m 1 bi bl io te čk e gr ad̄ e ko ju bi bl io te čk ig ra d̄a ko ji bi bl io te čk ig ra d̄a bi bl io te čk ig ra d̄a li ...
    ... 5, 6 no u pi ta nj u bi bl io te čk im at er ij al pi ta nj e bi bl io te čk im at er ij al za bi bl io te čk ig ra d̄a li br ar y m at er ia l 1 bi bl io te ka pa rt ne ra bi bl io te ka pa rt ne r i bi bl io te ka pa rt ne r bi bl io te ka uč es ni ca ...

  • 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

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... evidence for Tertiary counter- clockwise rotation of Adria with respect to Africa. In N. Pinter, Gy. Grenerczy, J. Weber, S. Stein, D. Medak (Ed.), The Adria microplate: GPS Geodesy, Tectonics and Hazards, (pp 71-80). NATO Science Series IV – 61. Márton, E., Toljić, M., Lesić, M., Cvetkov, V., Stojadinović ...
    ... re -d ep o si te d sh al lo w w at er ca rb o n at es w it h n eg at iv e su sc ep ti b il it y ei th er sc at te re d d ir ec ti o n s o r b ad d em ag n et iz at io n cu rv es . * L ef t o u t fr o m te ct o n ic in te rp re ta ti o n d u e to cl o se n es s to th e d ir ec ti o n o f p re ...
    ... north of Belgrade (which at more or less the same time suffered 30�–40� CW rotation in the Vardar- Tethyan mega-suture south of Belgrade), we can rely on the model of Toljić et al. (2012) who account for the 70� vertical-axis CW rotation as being due to large scale extensional deformation terminating ...

  • 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
    ... languages at that time). e other project was WISE – An Electronic Marketplace to Support Pairs of Less Widely Studied European Lan- guages (BSEC009 / 05.2007, 2007–2008)with the aim not only to produce cross-lingual lexical resources en- riched with linguistic meta-data but also to develop and promote ...
    ... Europe. Drawing on the insights gained so far, it appears that to- day’s ‘hybrid’ language technologymixing deep process- ingwith statisticalmethodswill be able to bridge the gap between all European languages and beyond. As this series of white papers shows, there is a dramatic differ- ence between ...
    ... requires all stakeholders – in politics, re- search, business, and society – to unite their efforts for the future. is white paper series complements other strategic ac- tions taken by META-NET (see the appendix for an overview). Up-to-date information such as the cur- rent version of the META-NET vision paper ...

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations

    Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković (2024)
    The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...
    dip-slip faults, vertical gravity gradients, field data analysis
    ... interpretation. International Conference on Energy Sciences (ICES 2016), 25—27 July 2016, Bandung, Indonesia, IOP Conference Series: Journal of Physics: Conference Series 877: 012039. ...
    ... different procedures were developed in order to infer the geometry of buricd structures: from the gravity anomalies. Some of those procedures are designed to help fault detection and fault type determination. Comprehensive review of Various approaches to the analysis and interpretation of gravity ...
    ... a et al., 2018) prefer to utilize gravity horizontal and/or vertical gradients to assess the characteristics of the fault. Gravity gradients are usually calculated from the gravity anomalies (often referred as a second vertical derivate, the more precise term due to a way of calculation), although ...

  • Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra

    Vladica Cvetković, Dejan Prelević, Ana Mladenović (2024)
    Neotethys, ocean closure, subduction
    ... ve finite differences with marker- in-cell method. It was so far able to reproduce the formation of two Jurassic ophiolite belts via a single intra-occanic subduction that terminated at the carliest Cretaceous. If this time marks the true onset of Adria-Europe collision, then all the subsequent ...
    ... godynamic events is closely related to the accurate understanding of the origin and evolution of the Sava-Vardar Zone (SVZ) [1]. This zone stretcthes WNW-ESE from Zagreb to Belgrade and then N-S from Belgrade to Thessaloniki. It is composed of Upper Cretaceous to Palaeogene flysch-like sediments ...
    ... believed to be true ophiolites that originated at the ocean floor. The most ophiolite-like rocks occur at North Kozara in the form of Campanian pillow basalts and sheeted dyke dolerites of tholeiitic composition. In terms of rock petrography, these rocks are indeed quite similar to adjacent ...

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... iušLte008| Y Horanalysis| municipal waste. In addition, physical properties of •n žž% M:s| ; H n pj ii r waste change over time, both in depth and from · · O waste- location to location, so the method of taking and O selection of representative samples is problematic and y &@F"c'“f'“ a has not yet ...
    ... phase, 106 changes over time. Therefore, it should be noted that there is a different representation of municipal waste phase composition, where the four-phase system is proposed and it consists of: gaseous, liquid, fibrous and sticky material phase similar to paste (Machado et al., 2008) ...
    ... 5. Water content change in relation to the depth of taken sample. The first phase means heating at a temperature of 55"% to constant mass. In this stage, loss of mass compared to a constant mass is defined as moisture (W). Thereafter, samples are heated to a temperature of 105%C and again ...

  • Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака

    Зоран Гојковић (2023)
    Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...
    Сентинел 1 интерферометрија, слегање, Перманентни скатерери, Костолац

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... and αβ-diasteranes, neohopanes (C27Ts, C29Ts), the prevalence of αβ- over βα- hopane isomers, and dominance of 22S- relative to 22R epimers in the C31–C35 homohopane series. Sterane and hopane compositions and corresponding maturity parameters: C29 ααα 20S/(20S+20R), C29 αββ/(αββ+ααα), C31 αβ 22 ...
    ... –31.9 ‰ in the sample D13 and from –28.7 to –32.5 ‰ (average value –30.9 ‰) in the sample D16. The δ13C values of individual n-alkanes in LPs from the OS of samples D13 and D16 are in range from –32.6 to –35.8 ‰ (average value –34.1 ‰), and from –30.0 to –33.7 ‰ (average value –32.8 ‰), respectively ...
    ... and –30.3 ‰, average value –28.7 ‰, and from –27.8 to –31.1 ‰, average value –29.6 ‰ of the sample D16. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently on kerogen type. Due to the fast release from the reaction medium, biomarker ...

  • Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)

    Pavle Tančić, Aleksandar Kremenović, Predrag Vulić (2019)
    In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...
    grandite, XRPD, crystal structure, structural dissymmetrization

  • Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance

    Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović (2017)
    Neo-Tethys, trench-like basins, synorogenic deposition, evolving thrust belt, Triassic palaeogeography
    ... Jurassic, affecting at that time the most distal parts ofthe Adria margin, and continued until the early Late Jurassic reaching at that time the area of the Drina-Ivanjica unit. Later, in the Latest Jurassic to carliest Cretaceous, new tectonic motions probably related to mountain uplift (Missoni ...
    ... (Triassic-Middle Jurassic) sedimen- tary succession of the former passive continental margin facing the Neo-Tethys Ocean to the east (Fig. 10a), now in a lower plate position, a series of trench-like basins were formed in front of the propagating nappe stack (Fig. 10b,c). The first basin formed in ...
    ... tinental slope (Meliata facies belt, Fig. 10a), laterincorporated into the nappe stack. Imbrication of the former passive margin led to the formation of a series of such trench-like basins ofthe westward propagating nappe stack (Fig. 10b,c). In the next phase, the former distal passive margin ...

  • History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia)

    Alena Zdravković, Maja Milošević, Kristina Šarić, Ivana Jelić, Ana Černok (2021)
    ... School of Belgrade (Beogradska Velika Škola), the precursor of University of Belgrade. A series of subsequent meteorite falls in Serbia (Jelica in 1889, Čačak in 1919, and Dimitrovgrad in 1947), contributed to further developments of meteorite collections and increased the potential for sample exchanges ...
    ... from Mauroy's private collection, which was the second largest collection in the world at the end of XIX century (Salpeter, 1957). However, by the time of their arrival, the samples were not numbered and were not accompanied with a catalogue. A revision of the collection was, therefore, not directly ...
    ... Измењено: 2023-10-14 04:27:04 History of meteorite donations to the Collection of Minerals and Rocks of the University of Belgrade, Faculty of Mining and Geology (Serbia) Alena Zdravković, Maja Milošević, Kristina Šarić, Ivana Jelić, Ana Černok Дигитални репозиторијум ...

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction
    ... stemming or lemmatization, and sometimes by replacing synonyms or hypernyms, in or- der to further reduce the surrogates and speed up the execution time. For a qualitative classification process, it is necessary to create a surrogate which properly represents the document. (Trieschnigg et al., 2009) ...
    ... documents to be classified, a second C# code has been prepared. It loads the classification documents one at a time and applies the script generated in the previous step so that the concepts are found by name and replaced by an ontology node identifier. This stage is the longest and the most time consuming ...
    ... value, i.e. the class most similar to the document that is the subject of the classification.7 The problem that arises in calculating the coefficient of similarity be- tween texts is high computer cost, which must be paid either in processing power or high execution time. For this reason, the first step ...

  • Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”

    Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić (2015)
    ... d=739.73m. The total of 54 points is designed in those chambers; those points are to represent the future mine continuing series of levels, and they need to be set out while carrying out mining works. Mine traverse is to include 54 traverse legs, or levelling distances with average length of 13.70m ...
    ... least resistance line at the same time. The transport and hauling of the ore is realized by the diesel-powered loading-hauling and dump (LHD) equipment and pit truck. The loading and transport of the blasted ore from the stope to the appropriate loading place to the pit truck is real- ized by the ...
    ... chambers designed within the vertical plane is to be carried out by using trigonometric leveling of reference points by means of vertical angle (zenith distance). The reference points representing traverse points are to represent, at the same time, leveling points (benchmarks) of the future mine ...

  • Public participation as an element of a mineral deposit safeguarding system – international experiences

    Alicja Kot-Niewiadomska, Vladimir Simić, Michael Tost, Linda Wårell (2022)
    angažovanje zajednice, javne konsultacije, administrativne procedure, zaštita ležišta mineralnih sirovina, društvena licenca za rad

  • Одређивање оптималне производње дубинске пумпе на клипним шипкама

    Небојша Савић (2024)
    Дужи временски период током историје производње нафте, дубинске пумпе на клипним шипкама су први и у многим случајевима једини избор када су у питању механичке методе експлоатације. Правилан одабир сваког појединачног елемента система омогућава оптимизацију која са собом повлачи бенефите у виду повећавања ефикасности и смањења трошкова. Тренутно примењени систем дубинских пумпи на клипним шипкама на лежишту „Н“ обезбеђује стабилну производњу и реализацију годишњих планова производње без већих проблема. У овом раду је приказан начин оптимизације производње дубинским пумпама ...
    дубинска пумпа, оптимизација, производња, потисни вентил
    ... 3aTBapaMbbe H OTBapaM= BeHTHJa. Ta moTpeOHa 3aHmpeMHHa cc TIOCTH)KC JEČHMHO KpO3 HOBchaHO KpeTaMbe Kpo3 IMMJIHHap. PanHH IMMKJIyC je ripHKa3aH Ha c 2.2. – P Cnuka 2.2 IIpuka3 ekcnaH3uje, ycucHo2 Juk/IyapMnpecuje u nomucHoo UJUKJIyCa ( Schlumberger/The Defining Series: Rod Pump Systems, URHEps://www ...
    ... 2015. The Beam Lift Handbook, The University of Texas, Austin 5. Schlumberger/rIhe · „Defining Series: Rod Pump Systems, URL: https://www.slb.com/resource-library/oilfield-review/defining-series/defining- rodpumps (08.04.2024.) 6. West, lan M., 2019. Petroleum geology of the south of England ...
    ... mjaMa 3 CJICMCHT4a IIYyMIIC: 1. V onHocy Ha TO Jta JIH Je IIyMIa HHCepT HJIH TyOHHT 2. V ojnHocy Ha TO Jla JIH IIyMITa HMa CTaHIHOHapHH (HeIIOKpeTaH) HJIH IIOKpeTaH TUHJIHH/IAp H KOJH THTI IIHJIHH/Ipa H Ki1mima cy yrpaljeHu 3. V onHocy Ha TO Jla H je IIyMIma ycCeJlHyTa y TOpEbeM HJIH JIOĐĆM ...