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Упит dcterms_subject_txt:space group

367 items

  • 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

  • A Mathematical Learning Environment Based on Serbian Language Resources

    Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan (2018)
    In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...
    mathematical content, text processing, mathematical formulae
    ... Notes in Computer Science, 4120 (1), pp. 241- 253. [6] Iancu, M., Kohlhase, M., Prodescu, C. (2014). Representing, Archiving, and Searching the Space of Mathematical Knowledge. Lecture Notes in Computer Science, 8592 (1), pp. 26- -30. [7] Lozier, L. D., (2003). NIST Digital Library of Mathematical ...
    ... morphological e-dictionaries and WordNet of Serbian, which have been developed within the University of Belgrade Human Language Technology group for several decades [1], as well as a newly developed glossary, Termi. The system is aimed at providing for enrichment of these resources with ...
    ... the latter being very important in highly inflective languages, such as Serbian. Of special importance is LeXimir, a tool developed within this group that greatly enhances the potential of manipulating each particular lexical resource as well as several resources simultaneously [10]. Although ...

  • Integrisano okruženje za pripremu paralelizovanog korpusa

    Ivan Obradović, Ranka Stanković, Miloš Utvić (2007)
    Razvoj paralelizovanih korpusa zahteva pripremu paralelnih tekstova za njihovu integraciju u paralelizovani korpus. Reč je o jednom kompleksnom zadatku koji se može rešiti na različite načine, i koji mora da se odvija u nekoliko koraka. U ovom radu najpre je iznet postupak pripreme paralelnih tekstova za paralelizovani korpus koji se koristi u Grupi za jezičke tehnologije Univerziteta u Beogradu. Potom je dat kratak pregled programa (XAlign, Concordancier, WS4LR), odnosno softverskih alata koji se pri tome koriste. Nedostatak udobnog okruženja ...
    ... of this paper we outline the procedure for preparation of parallel texts for aligned corpora which is being used in the Human Language Technology Group at the University of Belgrade. Texts are marked using XML tags, in accordance with the TEI (Text Encoding Initiative) consortium recommendations, ...
    ... absence of a comfortable environment with a graphical user interface, where all these programs would be united, motivated the Human Language Technology Group to embark on the task of developing an integrated environment for the preparation of aligned corpora, under the name of ACIDE. For the construction ...

  • Part of Speech Tagging for Serbian language using Natural Language Toolkit

    Ranka Stanković, Boro Milovanović (2020)
    Dok se razvijaju složeni algoritmi za NLP (obrada prirodnog jezika), osnovni zadaci kao što je označavanje ostaju veoma važni i još uvek izazovni. NLTK (Natural Language Toolkit) je moćna Python biblioteka za razvoj programa zasnovanih na NLP-u. Pokušavamo da iskoristimo ovu biblioteku za kreiranje PoS (vrsta reči) oznake za savremeni srpski jezik. Jedanaest različitih modela je kreirano korišćenjem NLTK API-ja za označavanje. Najbolji modeli se transformišu sa Brill tagerom da bi se poboljšala tačnost. Obučili smo modele na označenom ...
    obrada prirodnog jezika, mašinsko učenje, neuronske mreže
    ... released in March 2020. Having a plethora of different algorithms makes this library a good choice for a research. Serbian language belongs to a group of low-resource languages so there’s a modest research on this topic. First attempts to create an automatic PoS tagger for Serbian relied on a dictionary ...
    ... Evaluation (LREC'14), Reykjavik, Iceland, May 2014 [14] C. Krstev and D. Vitas, “Serbian Morphological Dictionary – SMD,” University of Belgrade, HLT Group and Jerteh, Lexical resource, 2.0, 2015 [15] A. Balvet, D. Stošić, and A. Miletić, (2014). TALC-Sef a Manually- revised POS-Tagged Literary Corpus ...

  • Хазард од клизишта у Србији у 21. веку

    Biljana Abolmasov (2019)
    клизишта, хазард од клизишта, промене климе
    ... 2nd American Symposium on Landslides and Engineered Slopes, Banff, Canada, 3�8 June, 2012. Ed Froese C., Turner K., Leroueil S., Taylor&Francis Group, London, Vo [7] �����, . (1979). ������� ›� ���������›�. ����� ›�-������›� ��›� �������, 175  ��. [8] Varnes D. J. (1984). Landslides hazard zonation: ...
    ... i onal’ ambrican Symposium on Landslides and Engineered Slopes, Banff, Canada, 3 8 June, 2012. E Froese C., Turner K., Leroueil S., Taylor&Francis Group, London, V 1 - (1979). > >. >- > > , 175 Varnes D. J. (1984). Landslides hazard zonation: a review of princ Natural Hazards 3. UNESCO Press, Paris. ...

  • Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia

    Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić (2019)
    Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology
    ... different sedimentary successions, MISssoNI et al. (2012) restrict the name Grivska to Triassic hemipe- lagic sequences and advocate the term Grivska Group, which comprises different Middle and Late Triassic hemipelagic bedded cherty limestones with layers of calciturbidites with shallow-water debris ...
    ... GAWLICK et al. (2017) offered definitions and emendations of some for- mations in the Inner Dinar- ides, including some parts of the Grivska Group. According to GAWLICK et al. (2017) the Grivska Formation is repre- sented by Upper Triassic (lo- wer Carnian - Rhaetian) cherty limestones ...

  • Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje

    Stevan Đenadić, Aleksandar Mirković, Veljko Rupar (2024)
    Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...
    rudarstvo, digitalna transformacija, baze podataka
    ... automatizacije procesa [2]. Prema Indeksu digitalne akceleracije (engl. Digital Acceleration Index, DAI) kompanije BCG (engl. Boston Consulting Group) navodi da je industrija metala i rudarstva digitalno 30-40% manje razvijena u poređenju sa drugim sličnim industrijama [3]. Generalno posmatrano ...
    ... itemId=/content/component/b9ed6f5e-en [3] Ganerwalla, A. & Harnathka, S. (2021). Racing Toward a Digital Future in Metals and Mining. Boston Consulting Group. available on: https://www.bcg.com/publications/2021/adopting-a-digital-strategy-in- the-metals-and-mining-industry [4] Stolterman, E. & Fors, A ...

  • Antioxidant and antimicrobial activity of some tetradentate Schiff bases and their Cu (II) complexes

    Aleksandar Mijatović, Milan Nikolić, Snežana Spasić, Aleksandra N. Žerađanin, Kristina Joksimović, Aleksandar Lolić, Rada Baošić (2020)
    Šifove baze i njihovi Cu(II) kompleksi su poznati po svojoj biološkoj aktivnosti. U ovom radu proučavana je antibakterijska aktivnost protiv gram-negativnih sojeva Escherichia coli, Pseudomonas aeruginosa i Staphilococcus piogenes, kao i Gram-pozitivnih Staphilococcus piogenes i Pseudomonas aeruginosa, zajedno sa antifungalnim dejstvom protiv Musperg strainilusa, A. Takođe, tehnički jednostavni i brzi testovi kao što su ABTS, HORAC i ORAC korišćeni su za ispitivanje antioksidativne aktivnosti kako bi se uporedili dobijeni rezultati sa različitim tipovima testova. Uprkos tome što je princip ...

  • Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia

    Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović (2020)
    Earth-Surface Processes

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... diversification of fuel mix for both groups of DH systems. The weaknesses of the first group of DH systems are high import dependency and unfavorable diversification of fuel mix. Although the second group is not dependent on import fuels, it relies on the most carbon-intensive fuel: coal. The share ...
    ... wastewater heat utilization. Meunier (2004) analyzed effects on carbon dioxide emission reduction of absorption waste heat pumps application for space heating. Mateu-Royo et al. (2020) presented the thermo-economic optimization, focusing on performance of the system and environmental analysis. Koll- ...
    ... (Statistical Office of the Republic of Serbia 2017). The highest share of energy consumed in the build- ings sector, more than 60%, is related to space heating (Econoler 2012; Stoiljković and Todorović 2015). District heating systems exist in 57 towns in Serbia (Fig. 3). The total installed capacity ...

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... used to develop magnetoelectric muhltiferroic materials. This is due to its unique dielectric properties in the tetragonal phase with the P4mm space group [30-—33]. In order to design novel multiferroic composites based on barium titanate, ferrites are one of the ideal candidates due to their attractive ...
    ... e-like phases were formed. However, spinel and tetragonal BaTiOs phases remain unchanged. The transformation of BaTiOs from P4Amm to P4/mmm space group Was observed at 1300 ?C in all studied cases. Inorganics 2023, 11, 51 3of 19 as-prepared In te ns it y [A rb . un it s] In te ns it ...
    ... Fe)Oa samples. Table 1. The phase composition of prepared composites. In parenthesis next to the phase chemical formulae crystal system and space group are presented as well as corresponding, PDF card numbers from the ICDD database. Phase abundances are calculated by the RIR method. Samples Phase ...

  • 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
    ... 50. 1–2 — 7iubospongopallium sp.; 3 — Triassoastrum sp.; 4 — Monocapnuchosphaera sp.. 5 — Capnuchosphaera sp., 61 — Capnodoce crystallina Pessagno group; 8 — Capnodoce sp. cf. C. crystallina Pessagno; 9 — Capnodoce anapetes De Wever; 10 — Poulpus sp. cf. P. piabyx De Wever, 11 — Crucella tenuis Tekin; ...
    ... organisms are missing. The following taxa were deter- mined (Fig. 6): Canesium sp., Canoptum? sp., Capnodoce anapetes De Wever, C. crystallina Pessagno group, Capnucho- sphaera sp., Corum regium Blome, C. sp. cf. C. regium Blome, C. sp. cf. C. speciosum Blome, Crucella tenuis Tekin, Japono- campe sp ...
    ... Capnuchosphaera theloides De Wever; 5 — Capnuchosphaera sp. cf. C. triassica De Wever; 6 — Capnuchosphaera sp.; 7–8 — Capnodoce crystallina Pessagno group; 9 — Poulpus sp. cf. P. piabyx De Wever; 10 — Praeprotunuma sp. cf. P. antiqua Tekin; 11 — Spinosicapsa sp. cf. S. yazgani (Tekin); 12 — Pachus ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... first group rTefers to the work of the CKH's members in commercial scientific research projects both in Serbia and the region and abroad. The projects, which are financed by government institutions and defined as projects of national importance belong to the second group. The third group of projects ...
    ... 9781138029682, Taylor & Francis group, pp. 71-86 . Milanović, S. (2016): 3D Spatial modelling of karst channels-The Beljanica karst massif, Karst without Boundaries, edt. Z. Stevanović, N. Krešić, N. Kukurić, CRC Press/Balkema, ISBN 9781138029682, Taylor & Francis group, pp.169– 188 . Milanović, S ...
    ... CRC Press/Balkema, ISBN 9781138029682, Taylor & fFrancis group, pp. 321-336 . Stevanović, Z., Kresic, N. and Kukuric, N. (2016): (Eds.): Karst without boundaries, IAH Selected Papers edition, 376 pp. CRC Press, Taylor & Francis Group . Milanović, S. (2015): Choosing Optimal Dam Sites and Preventing ...

  • 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)
    ... available for practical student exercises at UBFMG in Belgrade, Serbia. References Jović, V. 2002. From the History of Geology in Serbia. Jantar group, Belgrade, 142 p. Salpeter, E. W. 1957. The Vatican Collection of Meteorites. Specola Astronomica Vaticana, Vatican, 21 p. Urošević, S. 1899. LXXII ...

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... Uranium deposits associated with the granitoide complexes belongs to the group of hydrothermal vein and stockwork types located in the fault zones, while uranium deposits related to sedimentary series belongs to the group of ore of a roll-front type of mineralization. The further exploration of ...
    ... this group are lignites. Mineral resources with identified, economically interesting, predominantly small reserves which are not in exploitation, and mineral resources occurring in small quantities, sufficient for brief periods of production and the supply of domestic requirements. This group includes ...
    ... e also belong to this group. Although most of these resources are only partly explored, the study of the geological setting and metallogenic processes of Serbia show that there are favorable prospects for the discovery of new reserves. Oil shales also belong to this group. Mineral resources likely ...

  • E-Connecting Balkan Languages

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva (2009)
    In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.
    Query expansion, e-dictionary, wordnet, proper name, aligned text
    ... texts 1. Introduction The software tool WS4LR (shortened for WorkStation for Language Resources) is being developed by the Language Technology Group organized at the Faculty of Mathematics for several years now. Its first version was introduced in 2004 [8] and it dealt mainly with harmonizing ...
    ... of a particular semantic relation (e.g. hypernymy/hyponymy), in which case synsets pertaining to hypernyms/hyponyms of concepts from the initial group will also appear among the query set. This feature will be illustrated by the query which starts with the Serbian keyword brodić ‘small boat’ ...

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines

    Krstev Cvetana, Stanković Ranka, Vitas Duško, Obradović Ivan (2008)
    In this paper we present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for tuning queries before submitting them to a web search engine. We argue that the selection of words chosen for a query, which are of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and wordnets. These dictionaries enable semantic ...
    LR web services, MultiWord Expressions & Collocations, Information Extraction, Information Retrieval
    ... vitas@matf.bg.ac.yu, ivano@rgf.bg.ac.yu Abstract In this paper we present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for tuning queries before submitting them to a web search engine. We argue that the selection of words chosen ...

  • Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research

    Mirko Petković, Vesna Cvetkov, Branislav Sretenović (2014)
    магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија
    ... separately. The tra- verses were separated according to the direction of the acquisition, with one group categorised by traverses whose direction of the acquisition was pointed to the north, and the other group with the acquisition to the south. After separating the traverses by the direction of acquisition ...