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337 items

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... doi>10.1016/j.eswa.2008.02.047 [3] Danihelka, P.: Safety and Security Research and its Relation to VŠB-TU Ostrava. Transactions of the VSB-Technical University of Ostrava Safety Engineering Series, 2012., Number 2, 2012., Volume VII, pp., 1-5, ISSN 1801-1764 (printed version) [4] Dhillon, BS: ...
    ... at the same time, lack of ontologies in mining industry, a methodological approach to development of a system of ontologies for Serbian mining industry has been undertaken (Stanković et al, 2012). This ontology system, Rudonto, is envisaged as a general resource, with the main goal to enable knowledge ...
    ... trends, and exception conditions. An OLAP session takes place online in real time, with rapid responses to manager’s or analyst’s queries, so that their analytical or decision-making process is undisturbed. Online analytical processing involves several basic analytical operations, including consolidation ...

  • Palaeoflora of Kamenica (Pranjani Basin, western Serbia)

    Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević (2019)
    Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...
    макрофлора, млађи олигоцен, Прањански басен, Каменица
    ... of Maljen and Suvobor, while the north side is framed by peridotit-serpentine massif. (ereMIja et al., 1977). according to the changes of lithological compo- sition it is possible to divide the Pranjani Basin into three horizons: The oldest horizon is located in the western part of the basin (the village ...
    ... 2007). a gravity anomaly map (Fig. 2) was compiled in order to check the correlation between the position of Neogene basins and the distribution of gravity anomalies. Neogene basins are filled with sediments of low density, in comparison to the density values of the basement and surrounding rocks. In ...
    ... Early Miocene floras in Serbia The palaeoflora of Kamenica has been compared to the Oligocene and Lower Miocene floras from the territory of Serbia. Palaeovegetation from Kamenica differs from other Oligocene floras due to the exis- tence in a wetter climate. The climatic conditions in the period when ...

  • Using Lexical Resources for Irony and Sarcasm Classification

    Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković (2017)
    The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...
    ... #politics, #health, etc. as described in [2], [19]. On the other hand, it is possible to mark a single Twitter account as a collection of ironic tweets, provided that the contents of that account are known [2], [15]. In a series of papers,5 a collection of ironic tweets was 3In this and following examples ADJ ...
    ... the number of relations in a rule goes up to a maximum of all six relations. Restrictions that we introduce are the following: (1) a relation cannot be repeated more than once in a given rule; (2) the relation synonym can be found only as the first one in a series of given relations. That is how we have ...
    ... of [8]. Finally, a crowdsourcing method was used to gather ironic statements from product ratings shown on the Amazon site [13]. For research presented in this paper, we have generated a cor- pus of tweets based on online search with geolocation and time constraints, using the query: #ironija near:Belgrade ...

  • 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
    ... Budapest, Bratislava and Belgrade) with 0.5 million to 2.5 million inha- bitants contributing to extensive water use and pollution. Many organic compounds have been identified in the Danube River, i.e., to date: hydrophobic alkylphenolic, lipid series (n-alkanoic acids, n-alkanes, n-alka- nols and sterols) ...
    ... rs/jscs/ 1174 ANTONIJEVIĆ et al. MS was operated in the electron impact ionization mode (EI+, 70 eV) scanning from 35 to 500 Da at a rate of 1 s dec-1 and an inter-scan time of 0.1 s. Identification of the organic compounds. The EI+-mass spectra were compared with spectra of reference compounds ...
    ... for imidacloprid 250 nm and for clothianidin 260 nm. The retention time for thiamethoxam was 5.7 min, for imidacloprid 8.5 min and for clothianidin 7.4 min. For quantification purposes, calibration curves in the range from 0.1 to 100 mg L-1 were prepared. The LOD value for all the analysed neonicotinoids ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... right-hand side of sample d (close to the scale) and the top left-hand side of sample b (above the o mark). The beautiful and flat sections obtained by sawing, with a diamond saw testify to the good mechanical resistance of the objects, in accordance with the time necessary to saw the shards. This good ...
    ... How to conciliate antagonist physical and chemical requirements. Ann. Chim. Sci. Materiaux 2005, 30, 673–688. [CrossRef] Hulthen, B. On ceramic ware in northern scandinavia during the neolithic, bronze, and early iron Age: A ceramic-ecological study. In Archaeology and Environment Series (e-book) ...
    ... made by ancient potters. Obviously, the good mechanical strength due to the fiber reinforcement (the fibrous behavior of the length of the fiber pull-out reaches the millimeter range) was selectively searched for, and at that time the toxicity of asbestos fibers was not recognized. This demonstrates ...

  • Remontni radovi u bušotini sa dubinskom pumpom

    Jovana Milošević (2024)
    Remontni i stimulativni radovi u naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku zonu.U prvom slučaju remontni i stimulativni radovi kod proizvodnih bušotina služe za otklanjanje problema i povećavanje proizvodnje bušotine. Dok u drugom slučaju, kod potencijalnih bušotina su ovi radovi namenjeni završnim obradama ...
    remontni radovi, hemijska obrada, Gravel Pack, alat za instrumentaciju, puške za perforaciju
    ... Sand-Maduabuchi-Appah/bffcd6dbeefe6c91fd3056a9e354320f1 38ea608 slb. (2015). Preuzeto sa The Defining Series: Perforating Fundamentals: https://www.slb.com/resource-library/oilfield-review/defining-series/defining-perforating Soleša, M. (1996). Optimizacija remontnih i stimulativnih radova. TerraPERM ...
    ... Problemi nemaju svoj šablon i zbog toga je Jako teško i zahtevno utvrditi ih. Najznačajnija stavka kod ovakvih radova je iskustvo i odlično poznavanje svih delova opreme, kako bi uspeli da sami predvidimo moguće uzroke, ı shodno tome nađemo rešenja. Deo rada će upravo iz tog razloga biti posvećen delovima ...
    ... naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku ...

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... belong to the Grandis ammonite Subzone of the upper part of the lower Berriasian. The association described here appears to be close to the coeval ammonite association in Crimea. e 2023 Elsevier Ltd. All rights reserved. 1. Introduction The worldwide definition of the base of the Berriasian is still ...
    ... version of Breistroffer (1947), as opposed to the newer concept of Hoede- maeker (in Hoedemaeker et al., 2016) or Sarti (2020). The genus Haploceras lacks crenulate ribbing on the ventral side compared to the genus Hypolissoceras. We consider this ribbing to be the basic distinguishing characteristic ...
    ... arched flanks, descending to the coiling line by an unbounded low rounded zone. The ventral side is narrow and slightly rounded. The greater part of the whorl of both specimens probably belongs to the phragmocone, and the terminal quarter of specimen S80/5 belongs to the body chamber. The phragmocone ...

  • Back-arc underplating provided crustal accretion affecting topography and sedimentation in the Adria microplate

    Paolo Mancinelli, Vittorio Scisciani, Cristina Pauselli, Gérard M. Stampfli, Fabio Speranza, Ivana Vasiljević (2021)
    Supported by evidence of deep crustal sources for the observed magnetic anomalies in Central Italy and by outcropping gabbros in the Croatian archipelago, we model the observed gravity and magnetic anomalies in the Central Adriatic Sea and surroundings. We suggest that the major magnetic anomalies in the area are related to a wide underplating and propose that this volume represents the first stage of the back-arc Adria continental breakup in Early Permian times. During the Palaeotethys-Adria collision, underplating has ...
    Underplating, akrecija kore, Magnetske anomalije, Jadranska ploča

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... (Open Geospatial Consortium), outlined within the series of documents “OpenGIS Abstract Specification” [OGC AS] and “OGC Reference Model” [OGC 2008]. There are three basic ways of creating a geodatabase. If collections of geographic data that are to be merged within a geodatabase are available in one ...
    ... entire system, and at the same time easily access alphanumeric data. The outlined solution is only the first step in creating an integral GIS system for a mine. Hence, further research in this area will focus on extension of the OpmGIS system with thematic classes related to production, integration with ...
    ... transformed to the physical model for the ArcGIS development environment, which is being used at the Faculty of Mining and Geology in Belgrade for development of GIS applications. Thematic classes presented in this paper encompass only a part of the data related to mine production, and pertain to an important ...

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... amount of explosive: 3 red Q Q r  (7) where is: r - the distance from the blast site to the monitoring point m, Q - overall amount of explosive in a mine series kg. 2.2. Models of determination of soil oscillation law parameters There are two parameters K and ...
    ... under control, which gives an opportunity to plan the magnitude of shock waves for each future blast operation (Trajković et al. 2005). In this manner, the negative effects of blasting are reduced, production efficiency is increased and, at the same time, building structures, mining facilities and ...
    ... environment, the following results were obtained: - Compressive strength (21.1 to 93.0) MPa - Volume weight (17.1 to 26.3) kN/m3 - Density (0.97 to 0.99) kN/m3 - Porosity (0.0004 to 0.026) % - Water suction (0.08 to 0.23) % Parameter determination of soil oscillation law ... ...

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... ion [14,15]. At the same time, to our knowledge, the slag generated as waste in municipal heating plants due to lignite combustion, has not yet been sufficiently tested. This slag is very poorly described in the literature, and it is very difficult to find results related to finding its potential useful ...
    ... mass ratio between the water and binder was 1:2. Superplasticizer was used to improve the workability of the mortar mixtures, and the same amount was added to all mixtures. Table 2 shows quantities of material for making one series of mortar specimens (3 prisms with dimensions 40 mm × 40 mm × 160 mm) in ...
    ... prism was immersed by 5 to 10 mm. Prior to the immersion, the mass of the dry sample was measured, and after the immersion, the mass of the sample was measured after 10 min (M1), 90 min (M2) and 24 h (M3). Water absorption coefficient due to capillary action was calculated according to the following formulas: ...

  • ‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions

    Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban (2020)
    Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...
    Firing, Glaze, Traditional ceramics, Provenance studies, Augite

  • Praktikum za vežbe iz Informatike 1

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Mirjana Banković (2014)
    informatika

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... microformat dataset series. In: ISWC, 2014. [12] Paulheim, H. What the Adoption of schema. org Tells About Linked Open Data, 2015, http://ceur- ws.org/Vol-1362/PROFILES2015_paper6.pdf [13] Barker, P and Campbell, L.M. Learning Resource Metadata Initiative: using schema.org to describe open e ...
    ... lots of irrelevant results due to the huge amount of materials available. Through the use of metadata the Learning Resource Metadata Initiative (LRMI) offers ways to help pinpoint the right learning resources to address user needs. Applying metadata tags to educational materials makes them ...
    ... access to descriptive data on educational resources, pooling knowledge about learning resources and providing tools and services to create applications that make use of big data about resources. However, a lot of work still needs to be done before BAEKTEL enters full exploitation to the ...

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... the standard deviation and the autocorrelation of the coal property (for blending), then the program initially creates a time series of property values for the coal delivered to the stockyard. Next, the data sequence is rearranged by simulating the operation of the stacking and reclaiming equipment ...
    ... pit filling takes 18 to 30 hours (net), meaning a gross value of 1 to 2 days, while emptying takes twice as long. The variability of pile size moves this rule, because filling a shorter pile will take a shorter amount of time, and conversely, a longer pile takes longer to fill. Of course, planning ...
    ... run-of-mine coal or other ore or material. In order to restrict the time necessary for homogenization activities, stockyards are divided into smaller units, piles, used for homogenization of coal delivered in a relatively short period of time. Viewed on stockyard level, each pile contains coal ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... thus combining the time dimension (with its hierarchy) and injury severity. 13th ISCSM 2016 BELGRADE 8 Figure 8. Various OLAP presentations 4. Conclusion Both managers and employees in mine safety need to analyze the dynamically changing sets of information to improve and support ...
    ... where the accident occurred is determined by location and site, and a record is also made of whether the accident occurred during working time, or during arrival to or departure from work. Finally, our BI system records the sources and causes of injuries, the occurrence and the number of injured ...
    ... trends, and exception conditions. An OLAP session takes place online in real time, with rapid responses to manager’s or analyst’s queries, so that their analytical or decision-making process is undisturbed. Online analytical processing involves several basic analytical operations, including consolidation ...

  • Infotheca (Q25460443) in Wikidata

    Ranka Stanković, Lazar Davidović (2021)
    Vikipodaci su baza znanja Zadužbine Vikimedija koja predstavlja zajednički izvor različitih vrsta podataka koje koriste ne samo drugi Vikipedijini projekti, već sve više i brojne aplikacije semantičkog veba. U ovom radu ćemo prezentovati primer integracije Vikipodataka sa digitalnim bibliotekama i eksternim sistemima, kao i mogućnost ubrzanja pripreme i unosa podataka na primeru radova iz časopisa za digitalnu humanistiku Infoteka.
    semantički veb,otvoreni povezani podaci, vikpodaci,Infoteka, metapodaci časopisa
    ... tool is being developed as part of a lager initiative, WikiCite,7 aiming to index biblio- graphic data in Wikidata on the resources that can be used to corroborate the claims made in Wikidata, Wikipedia or elsewhere. At the time when we are inundated by false information on the web, proper corroboration ...
    ... Hair (film): Q757156), TV series (Game of Thrones: Q23572, ’Allo ’Allo! : Q425628), ballet (Don Quixote (ballet): Q1239463). . . The concepts behind items should be unique, but as it hap- pens, there can exist two items under the same name, Nikola Tesla (Q9036) refers to the famous scientist, while ...
    ... individual pieces of data is often a time-consuming task, but it can be sped up in the situations where data already exists and is stored in different digital formats. With proper prior preparation, it can be entered in Wikidata semiautomatically. Therefore, the basic idea was to speed up the entry of data about ...