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1033 items

  • 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

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... agate mortar, the material was transferred to a platinum crucible, covered with a lid and then placed in a furnace with resistance wire heating elements. Starting from room temperature the sample was heated to 1273 K with a rate of 200 K h�1. The maximum temperature was maintained for 12 h. Subsequently ...
    ... an agate mortar, the material was transferred to a platinum crucible, covered with a lid and then placed in a furnace with resistance wire heating elements. Starting from room temperature the sample was heated to 1273 K with a rate of 200 K h~'. The maximum temperature was maintained for 12h. Subsequently ...
    ... non-distorted hexagonal pyramid with a triple vertex, or as a truncated hexagonal pyramid with a regular hexagonal base upon which a parallel triangular face is situated [Figs. 1(a) and 2(a)]. This parallel triangular face (small equilateral triangle in the oxygen sheet with the 3.6.3.6 meshes) is a common ...

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...

  • Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study

    Ksenija Micić, Miloš Marjanović, Biljana Abolmasov (2024)
    Debris flows are among the most dangerous erosional geohazards due to the fast rate of movement and long runout zones. Even though the initiation can be triggered in mountainous areas, inhabited and with steep slopes, their propagation and deposition can endanger not only buildings and infrastructure in the urbanized areas, but also threaten human lives. As these initiation areas usually represent unattainable terrains with rapid vegetation cover development, field observations and aerial photo analysis become high-demanding tasks. Consequently, medium-to-regional ...
    tečenje drobine, Flow-R, procena podložnosti, empirijski model

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... metadata scheme Petlja The Petlja Foundation 1 was founded with the aim of improving algorithmic literacy in Serbia through OERs. It includes the portal with learning materials for programming and Takprog, an official website with materials from competitions of secondary school students in Serbia ...
    ... there were 445 (162 public and 283 private) pre-school institutions with 218,567 children enrolled. According to the same source, at the beginning of the school year 2018/19, there were 3319 regular elementary schools with a total of 527,834 students, 506 secondary schools (454 public and 52 ...
    ... and description of either uploaded resources or other courses on the Portal is enabled only for authorised users with teacher role, so those users must have an account. Only users with accounts can use the Portal as teachers. A metadata schema was designed that consists of data elements drawn from ...

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • An Efficient Class of Iterative Root-Finding Methods with Applications

    Dejan Ćebić, Nebojša Ralević (2021)

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... experiments with various rule strategies were possible – the final strategy being the result of several iterations. The current strategy consists of 53 rules: 19 rules for compounds with 2 components, 20 rules for compounds with 3 components, 8 rules for compounds with 4 compo- ...
    ... While working with a particular synset the user can use the hypernym/hyponym relations to ask for a tree representing the synset with parent and child nodes (Fig. 3). In that case, WS4LR also enables direct access to all synsets within the tree. Fig. 3 Synset with the corresponding ...
    ... WS4QE (Workstation for Query Expansion) has further been devel- oped within the Group, with the aim of supporting the de- velopment and usage of linguistic resources for Serbian via the web. In parallel with this application, corresponding web services have been developed. These services ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... for sheet Ivanjica.7 Several maps were prepared with ArcGIS Server 9.3.1 and web services were published, compliant with the Open Geospatial Consortium’s (OGC) Web Map Service (WMS) specification. The next step con- sisted of building web applications with GIS capabil- ities using the .NET Web Application ...
    ... should be readily and transparently available. The web portal for geological resources of Serbia was created with the aid of modern web and GIS tech- nologies. The largest part was realized with the use of the PHP (Hypertext Preprocessor) script language on server side and the XHTML (eXtensible HyperText ...
    ... . Thus, the result was a comprehensive solution, visually and technologically in compliance with modern concepts in the creation of web applica- tions, offering the user a simple and intuitive interface with cross browser support. Conceptually, the con- tents of the portal can be divided into the part ...

  • Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content

    Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)
    Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...
    Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugs

  • 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

  • Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin

    Angelina Petrović, Aleksandar Mijatović, Rada Baošić, Jovana Bogojeski (2018)
    Joni prelaznih metala u kombinaciji sa različitim ligandima nude veliki broj mogućnosti za ispitivanje potencijalnih bioaktivnosti. Među jonima prelaznih metala, bakar je poznat kao endogeni metal za ljude, sa karakterističnim biološkim redoks aktivnostima i relativno jakim afinitetom za nukleobaze. Kompleksi bakra ispoljavaju svoju antitumornu aktivnost na nekoliko različitih načina, generišu veliku količinu ROS, što uzrokuje oksidativno oštećenje mitohondrija i biomakromolekula. Nađeno je da kompleksi bakra(II) imaju umeren do dobar afinitet vezivanja sa DNK, uglavnom putem interkalacije.

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje

  • A Data Driven Approach for Raw Material Terminology

    Olivera Kitanović, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić, Ivan Babić, Ljiljana Kolonja (2021)
    The research presented in this paper aims at creating a bilingual (sr-en), easily searchable, hypertext, born-digital, corpus-based terminological database of raw material terminology for dictionary production. The approach is based on linking dictionaries related to the raw material domain, both digitally born and printed, into a lexicon structure, aligning terminology from different dictionaries as much as possible. This paper presents the main features of this approach, data used for compilation of the terminological database, the procedure by which it has ...
    sirovine, rudarstvo, terminologija, rečnik, terminološka aplikacija, mobilna aplikacija, digitizacija, leksički podaci, korpusi, otvoreni povezani podaci
    ... Serbian term, but there were 1355 entries with two terms, and 120 with 3–5 terms, resulting in a total of 18,092 Serbian terms, of which 16,916 distinct. As to the English part of the dictionary, there were 13,163 entries with one term, 2553 with two terms and 775 with 3–8 terms, resulting in a total of 20 ...
    ... [38]), a tool for chunk alignment [39,40]. The method combines the approach with existing domain terminology lexicons with term extraction tools. For English, FlexiTerm [41] was used with threshold 3 and TermSuite [42] with threshold 4, based on the experience from other domains and the fact that they ...
    ... of DMMRT yielded 28,757 terms with a total of 37188 sense definitions, where 24,115 terms have only one sense, 2942 have 2, 890 have 3, 641 have 4–6, 139 have 7–10, and 34 have 11–21. The most polysemous word is ‘head’ with 21 senses, followed by ‘drift’ and ‘bottom’ with 20 senses. Types of relations ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... entity reference was replaced with a whitespace during preprocessing step) is replaced with < character, so that the emoticon <3 cound be found in the text. Entity reference 039 is replaced with ’ charac- ter, so that emoticons such as :’( could be found. String :- is replaced with character : , so that both ...
    ... first 32 characters from ASCII set and then replaces them with an empty string. To further ensure that the document is well-formed character & is replaced with a whitespace and a new root element is introduced. Preprocessing is finished with an XSL transformation that transform a document into one that ...
    ... valid, this method could allow machine learning the usage of huge corpus of texts that are pre-labeled with determiners. 1.1 Review of their former similar studies In 2005 a series of experiments with the classification of mood for internet blog posts was published, and it served as the basis for many ...

  • Introductory editorial - Special issue: Genesis and protection of groundwater in carbonate aquifer

    Saša Milanović (2019)
    Geochemistry and Petrology

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... Introduction Previous studies have shown that strike-slip deformation is often associated with segmentation of fold and thrust belts or mid-ocean ridges, with changes in polarity of subduction systems, as well as with lateral escape of continental lithosphere during indentation (e.g., Mann, 2007 and ...
    ... shortening in front of the indenter with deformation in another subduction system, such as observed in the Dinarides orogen connecting the shortening in the Alps with Aegean subduction (van Unen et al., 2019), or the Sagaing Fault linking the shortening in the Himalayas with the Sunda subduction zone (e ...
    ... Fig. 2. Modelling setups. Adopted orientation is geographical with up being relative north. All numbers in Fig. 2a–d are in centimetres. a) Initial setup of experiments with rounded indenter’s corners. b) Initial setup of experiments with rectangular indenter’s corners. c) Configuration at the end of ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... edit provided that he/she is familiar with the SQL query language. After query submission, the appropriate layer is displayed with highlighted spatial objects that satisfy query conditions. It is further possible to automatically open the data form with selected (highlighted) objects and to perform ...
    ... in the upper part the results for the unexpanded query, with 13 geologic units highlighted, and on lower side results for the expanded query, with 33 geologic units. Ranka Stanković 73 Figure 7. Selected geologic units with the original and semantic expanded query 6. Conclusion ...
    ... form for data management, with the possibility of adding various related data, such as geochemical and geophysical analysis, different types of measurements, stratigraphic age, lithology, etc. Figure 1. Geological unit selected in GeolISS environment with related data Ranka Stanković ...