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Упит dcterms_subject_txt:space group

367 items

  • Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia

    Pavle Tančić, Aleksandar Kremenović (2022)
    Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42 Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by com parative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R63c space group. Various polyhedral distortions and structural or derdis or dervariations between the zones studied are also described and discussed. The ...
    Geology

  • Proširivanje upita zasnovano na leksičkim resursima

    Ranka Stanković, Ivan Obradović, Cvetana Krstev (2009)
    U radu je opisano kako se leksički resursi za srpski jezik i softverski alati, razvijeni u okviru Grupe za jezičke tehnologije Univerziteta u Beogradu, mogu koristiti za unapređenje postavljanja upita. Rezultati pretrage mogu biti značajno unapređeni korišćenjem različitih leksičkih resursa, kakvi su morfološki rečnici i semantičke mreže. Izloženi pristup može se iskoristiti i u Sistemu naučnih, tehnoloških i poslovnih informacija, jer je efikasno pretraživanje ovog dragocenog resursa, imajući u vidu njegovu heterogenost i obim, kao i preovladavajući tekstualni sadržaj, ...
    ... upita, koje pruža web aplikacija WS4QE. Abstract - This paper presents how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for improvement of queries. Search results can be substantially improved by using various lexical resources ...
    ... complex task. The tools we describe are WS4LR, a software tool that has already been developed and used for solving different tasks within the Group, and a web application named WS4QE, accompanied by several web services, that enables the solution of various tasks via the web. Besides a short ...

  • Temperature induced evolution of nanostructured Ni0.9Zn0.1O

    Kremenović Aleksandar, Antić Bratislav, Vučinić-Vasić Milica, Colomban Philippe, Jovalekić Čedomir, Bibić Nataša, Kahlenberg Volker, Leoni Matteo (2010)
    The crystal structure and microstructure of as-prepared and annealed Ni0.9Zn0.1O were refined at room temperature in both the Fm (3) over barm and R (3) over barm space groups. It is shown that below the Neel point (458 K), where magnetic ordering triggers the presence of a trigonal strain, the common usage of a higher-symmetry non-admissible space group for crystal structure and microstructure analysis via the Rietveld method may result in both an incorrect structure description and incorrect microstructure ...

  • Wordnet Development Using a Multifunctional Tool

    Ivan Obradović, Ranka Stanković (2007)
    In this paper we present a multifunctional tool for manipulating heterogeneous language resources. The tool handles electronic dictionaries, wordnets and aligned texts, and provides for their synchronous use in various tasks. We focus here on the description of the possibilities this tool offers in the development of wordnets. Besides the wordnet module which enables parallel handling of two wordnets, other modules, such as the module for morphological dictionaries and the module for aligned texts, as well as available finite ...
    Wordnet development, language resource integration, HLT tools
    ... and mechanisms for extraction of groups of synsets on basis of various criteria. The HLT group is now working on porting the most important functions of WS4LR on the web. The ambition of the HLT group is to make a full-scale web version of this tool which would, among other things, enable its ...
    ... html 4 http://nlp.fi.muni.cz/projekty/visdic/ 3. A Multifunctional Language Resource Tool 3.1 Motivation The Human Language Technology group at the University of Belgrade has been developing various lexical resources over quite a long period, reaching a considerable volume to date. ...
    ... naturally been conceived within different projects and frameworks, both from the conceptual and the technological point of view. Although the HLT group made every reasonable effort to keep the ever growing pool of resources as coherent and standardized as possible, a certain level of heterogeneity ...

  • Sexual dimorphism and left-right asymmetry of carapace ornamentation in Hemicytheria setosa RUNDIĆ 2002

    Vukica Vujić, Ljupko Rundić, Tamara Karan-Žnidaršič (2019)
    In biostratigraphic research of the Upper Miocene of the Pannonian Basin System, one of the frequently detected and important ostracod genera is Hemicytheria. Among more than 20 species of this genus, Hemicytheria setosa is present in sandy facies of the Lake Pannon sediments in Serbia and Bosnia and Herzegovina. The aims of this study were to describe sexual dimorphism and differences between left and right valve morphology in Hemicytheria setosa. Landmark based geometric morphometrics is applied on the grounds ...
    Morfologija ljušture, Ostrakode, geometrijska morfometrija, gornji miocen, južni deo Panonskog basena

  • An Approach to Development of Bilingual Lexical Resources

    Stanković Ranka, Obradović Ivan, Trtovac Aleksandra (2012)
    ... for French, Italian, and German, and the use of multi-term descriptors as a means to better identify the content. The Human Language Technology group at the University of Belgrade developed Bibliša (http://hlt.rgf.bg.ac.rs/Biblisha), a tool aimed at enhancement of search possibilities in digital ...
    ... essentially handled by a web service (wsQueryExpand.asmx), which is part of the LeXimir software package, a multipurpose tool also developed by the HLT Group [Stanković et al., 2011]. The web service invokes LeXimir’s function library LeXimirCore, whose functions expand the query, using available lexical ...
    ... development of a third bilingual lexical resource. The basic reason was that the available resources (except SrpWN) were not developed within the HLT Group and hence had to be used on an “as is” basis. But even the development of SrpWN is restricted to a certain extent by the fact that Serbian synsets ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... can be part of a relational table as a normal column and processes using a multitude of operators. The space required for storage and sharing of vector data is usually much smaller than the space required for raster data. Another advantage of vector data is that they can be easily updated and maintained ...
    ... vector data model to represent reality. Raster data sets record a value for each point in the area of interest, which may require more storage space than the representation in vector format that stores only the Ranka Stanković 66 necessary data. Vector data can be displayed as vector graphics ...
    ... IMPROVEMENT OF GEODATABASE QUERIES WITHIN GEOLISS Abstract: We present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for improvement of queries for the geodatabase within the Geological information system of Serbia (GeolISS) ...

  • Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage

    Maja Milošević, Biljana Đorđević, Alena Zdravković (2021)
    ... microscopy on cross-sections perpendicular to the vessel walls. In order to confirm the presence and closer determination of individual minerals from the group of clays, oriented preparations (X-ray diffraction) were made. Studies conducted with a scanning electron microscope (SEM) equipped with a detector ...
    ... by joining clay material or from the iron minerals that are present. Further examination reveals smaller grains of quartz and minerals from the group of feldspar, which are firmly bound in the basic mass. In most cases, coatings of iron oxide are observed on the grains of minerals. There is a uniformity ...

  • Annotation of the Serbian ELTeC Collection

    Ranka Stanković, Cvetana Krstev, Branislava Šandrih Todorović, Mihailo Škorić (2021)
    Ovaj rad predstavlja takozvano izdanje nivoa 2 kolekcije tekstova SrpELTeC razvijene u okviru aktivnosti Radne grupe 2 – Metode i alati COST akcije CA 16204 (Distant Reading for European Literary History) i njene specifikacije šeme. Izdanje nivoa 2 je nastavak izdanja nivoa 1, koje se koristi kao ulaz za morfosintaksičke i NER anotacije romana. Srpska obrada nivoa-2 je navedena kroz potrebne korake, uključujući metode i alate koji se koriste u tom procesu. Neki statistički podaci iz srpske kolekcije nivoa ...
    udaljeno čitanje, literarni korpus, tagiranje, prepoznavanje imenovanih entiteta, lematizacija, ELTeC

  • Novel cerium and praseodymium doped phosphate tungsten bronzes: Synthesis, characterization, the behavior in the Briggs-Rauscher reaction and photoluminescence properties

    Tijana Maksimović, Pavle Tančić, Jelena Maksimović, Dimitrije Mara, Marija Ilić, Rik Van Deun, Ljubinka Joksović, Maja Pagnacco (2023)
    Due to the interesting and potentially useful properties, phosphate tungsten bronzes are constantly being studied and attract a lot of attention. In the present work, two different metallic elements, belonging to the group of rare-earth metals, cerium and praseodymium, were used as a dopants for phosphate tungsten bronzes. Novel cerium and praseodymium doped phosphate tungsten bronzes were successfully synthesized and further characterized by thermal analyses, Fourier-transform infrared spectroscopy, X-ray powder diffraction, scanning electron microscopy with energy-dispersive X-ray spectrometer and ...
    Electrical and Electronic Engineering, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Spectroscopy

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... Working Group of the Dublin Core Metadata Initiative developed DC terms to describe educational resources. They also proposed a number of LOM elements to be added to enhance the DC record. Several metadata initiatives follow the recommendations provided by the DC Education Working Group. The ...
    ... metadata standards for learning resources. They focus on existing standards and technical reports and conducted a survey on the use of LOM. The group published a first draft of a standard towards the end of 2005, but an ISO International Standard for metadata has not yet been released. As mentioned ...
    ... by scoring resources against keywordson basis of user search activity Preselected groups of resources Resource access level permissions by user group Multilingual,allowingthe user to change the languagewith most major languages supported Automatic thumbnail creation for resources Minimal hosting ...

  • 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
    ... type of organic matter (OM) in recent sediments of the Tisza River, along a distance of 153 km through the territory of Serbia. For this purpose, group organic–geo- chemical parameters and biomarker compositions were used. All samples con- tained approximately same amount of OM, which was deposited ...
    ... nic impact, an investigation of the origin and type of organic matter in its sediments was the defined objective of this study. For this purpose, group organic–geochemical data and biomarker compositions were used. EXPERIMENTAL A total of 10 sediment samples were collected from 9 sites along the ...
    ... NIST5a). The biomarker parameters were calculated from the GC–MS chromato- gram peak areas (software GCMS Data Analysis). RESULTS AND DISCUSSION Group organic–geochemical parameters The amount of the total organic carbon (Corg) and soluble organic matter (bitumen) in the surface sediments of the ...

  • Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma

    Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković (2013)
    ... TABLE 2. Patients’ TNM Classification and Staging Initial N + M Classification Revised N + M Classification at the End of Follow-up Period Group n % Group n % N0M0 76 62.8 N0M0 75 62.0 N1M0 43 35.5 N1M0 41 33.9 N1M1 2 1.7 N1M1 5 4.1 Total 121 100.0 Total 121 100.0 Initial TNM staging Revised ...
    ... (83.1%) were female and 22 (16.9%) were male patients (female- to-male ratio, 5.9:1) aged from 10 to 80 years (mean age, 44 years). Among the studied group, only 5.4% of patients had follicular thyroid cancer; the remainder was classified as papillary carcinoma. Total thy- roidectomy was performed in 50 ...
    ... on Patients’ Data and Initial Treatment n % Demographic and histological characteristics Sex Women 108 83.1 Men 22 16.9 Total 130 100.0 Age group G45 69 53.1 945 61 56.9 Total 130 100.0 Histology Papillary 123 94.6 Follicular 7 5.4 Total 130 100.0 The mode of initial treatment Surgical ...

  • Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis

    Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović (2017)
    U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...
    Omeka, Wordnet, pretraga punog teksta, morfološka i semantička pretraga teksta, proširenje upita
    ... (e.g. intended to harm) or whether they are not (e.g. simply provocative). 8 SOFTWARE SOLUTIONS MODEL The human language processing group (HLT group) at the University of Belgrade is engaged for many years now in a task of producing various language resources9, both corpora and lexicons. ...
    ... been developed for many years, they have naturally been conceived within different frameworks and the technological point of view. Although the HLT group made every reasonable effort to keep the resources as coherent and standardized as possible, a certain level of heterogeneity was inevitable. Hence ...
    ... developing a set of tools that would facilitate the maintenance and exploitation in different domains and scenarios. Embarking on this task, the HLT group has produced a workstation for language resources, labelled LeXimir and set of web services Vebran, which greatly enhances the potentials of manipulating ...

  • The Nooj System as Module within an Integrated Language Processing Environment

    Ranka Stanković, Duško Vitas, Cvetana Krstev (2008)
    NooJ, electronic dictionary, lexical resources
    ... of its main modules. This environment named WS4LR (WorkStation for Lexical Resources) has been developed within the Human Language Technology Group (HLT) at the Faculty of Mathematics, University of Belgrade, and is aimed at manipulating heterogeneous lexical resources developed in the course ...
    ... ‘document, dokumenta, dokumentu, dokumentom,..’ 2. Integrated environment for linguistic research 2.1. Motivation The Human Language Technology group has been developing a variety of lexical resources over a long period, reaching a considerable volume to date. These resources have been developed ...
    ... have been conceived within different projects and frameworks, both from the conceptual and the technological perspective. Despite that the HLT group made every reasonable effort to keep the constantly growing pool of resources as coherent and standardized as possible, a certain level of heterogeneity ...

  • Hidrohemijske karakteristike termomineralnih voda Mataruške Banje

    Snežana Kretić, Jana Štrbački (2022)
    Mataruška Banja je naseljeno mesto u Centralnoj Srbiji, koje teritorijalno pripada opštini Kraljevo. Banja je poznata po prirodnim lekovitim vodama visokih temperatura. Formiranje termomineralnih voda vezuje se za rasprostranjenje magmatskih stena. Cilj rada je definisanje hidrohemijskog sastava ovih voda i razmatran je kroz rezultate osam kompletnih hemijskih analiza i jedne skraćene hemijske analize, uzete sa bunara MB-2/81. Hidrogeološka istraživanja, uzorkovanje i izrada kompletnih hemijskih analiza izvršeni su u periodu od 1981. do 2004. godine, dok je uzorkovanje i izrada ...
    Mataruška Banja, termomineralne vode, kvalitet podzemnih voda, vodonik-sulfid, metasilicijumska kiselina

  • Phase and microstructural study of urinary stones

    Miljana Mirković, Anja Dosen, Suzana Erić, Predrag Vulić, Branko Matović, Aleksandra Rosić (2019)
    In this paper we present the phase and morphological characteristics of urinary stones from Serbian patients. The study included for the first time the determination of the phase composition and a statistical analysis of the presence of different types of urinary stones in both men and women in Serbia. The main goal of study was representation of collected data for the first time. For past three years, more than 600 samples were collected from Serbian patients. The phase composition ...
    бубрежно камење, фазни састав, статистика, рендгенска дифракција праха, скенирајућа електронска микроскопија

  • Combining Heterogeneous Lexical Resources

    Cvetana Krstev, Duško Vitas, Ranka Stanković, Ivan Obradović, Gordana Pavlović-Lažetić (2004)
    development of lexical resources, morphological dictionaries, WordNet
    ... -Laž etiæ , professor, Faculty of Mathematics, Belgrade, gordana@matf.bg.ac.yu Abstract One of the main tasks of the Natural Language Processing Group at the Faculty of Mathematics, University of Belgrade is the development of various lexical resources. Among them the two most important ones are: ...
    ... retrieval, integration, and reuse across various Web applications. 1 Introduction One of the main tasks of the Natural Language Processing Group at the Faculty of Mathematics, University of Belgrade is the development of various lexical resources. Among them the two most important ones are: ...
    ... possessive adjectives from a text that do not belong to the Ekavian pronunciation. The entries in DELAS can be enriched by derivational links that group together entries belonging to the same derivational nest. This kind of information is given after an underscore sign. For instance, (2) devojcyin ...

  • Утечњени природни гас (УПГ) – технологија производње и регасификације

    Јована Милетић (2024)
    У овом раду истраживање је обухватило сагледавање карактеристика утечњеног природног гаса као извора енергије и његове улоге у савременој расподели потрошње енергије на глобалном и европском нивоу. Проучени су елементи тржишта утечњеног природног гаса, сектори коришћења, транс-портне руте и количине испорука. Сагледан је пут природног гаса од лежишта до корисника преко утечњавања и транспорта у резервоарима, са посебним акцентом на технологијама производње и регасификације. Објашњено је пречишћавање сировог природног гаса ради уласка у процес утечњавања, процеси утешњавања и настојања ...
    утечњени природни гас, технологија производње и рега- сификације, транспорт, директно коришћење УПГ-а, могућност коришћења УПГ-а у Србији
    ... KOHIHeHTpanujH OJ 5% (noMa rpaHuma 3amaJbHBoOcTH) JO 15% (ropĐa rpaHuma aanaJbHBocTH) (GIIGNL's Technical's Group, 2015). TeMmepaTypa caMoHŽajbeMba gH3HOcH oKo 540%C (GIIGNL's Technical's Group, 2015). JenmHa OJL HajBaxKHHjHX OcOOHHa, Koja ne(HIe KOJIHKO eHeprHje TOpHBO MO»Ke Ja 00e30e/uH, Jecre ...
    ... Procedure. Wartsila, Finland. Ime i broj projekta: IN023/WFI-P PPTECH. 22. GIIGNL's Technical Study Group, (2015). Basic Properties of LNG. LNG 7Information Paper No.l. The International Group of Liquefied Natural Gas Importers. Paris: GIIGNL. https://www.guignl.org , pristupljeno 20.05.2024. ...
    ... npemao y TeuHOo craPĐe pajui oMoryhaBama jeHOcTaBHOr TpaHcHopTa H cKJIaJIHIITeMa TIpe/i- CTaBJba yreubbeHH ripHpojiHu rac (GIIGNL's Technical's Group, 2015). /la 0u yreumeHu rnpupojnHu rac OHo y noTIyHocTH ne(QuHHucaH H o0janIibeH KaO H3BOPp cHePrHje, IOTpeOHo je cartennaTH P-erOBeE XeMHJCKe, ...

  • 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
    ... arsenopyrite is closely related to the orthorhombic marcasite [10] and tetragonal rutile [9]. Our observations confirm a monoclinic crystal system, space group P2; /c [9]. As observed on the experimental Kikuchi lines image (Figure 4b,c), the whole pattern symmetry is m (Figure 4a,b), and the arsenopyrite ...
    ... TEM analysis closely resembles the marcasite prototype structure (Figure 4d). We interpret the occurrence of the forbidden hk0 reflections (space-group absences) observed in the experimental SAED (Figure 4a) to occur due to twinning [10]. Figure 4. (a) SAED pattern indexed for arsenopyrite, with ...
    ... with the corresponding, (b) CBED pattern showing Kikuchi lines. (c) Simulated SAED and CBED (threshold 55%, intensity factor 1%, squares are space group absences). (d) Arsenopyrite crystal structure in the same orientation left to right: ball-stick model, coordination tetrahedra model, Fe-tetrahedra ...