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1034 items

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... the Dinaride orogen with ruptures, which have reached the bottom of the lithosphere triggering the melting of the upper lithosphere, previously metasomatized by crustal material (Cvetković et al. 2004, 2014; Prelević et al. 2005). This trigger produced volcanic activity with elevated potassium content ...
    ... ić et al. 1989). Going upwards in the strati- graphic scheme, Lower Cretaceous sediments are replaced with shallow water reef limestones and clastics. The Upper Cretaceous succession starts with Albian–Cenomanian con- glomerates, microconglomerates, sandstones, carbonates, and continental shales ...
    ... sedimentary rocks show metamorphic alteration only in the zones of direct contact with volcanic rocks. Analytical methods Major elements were obtained by EMPA using a JEOL 6610 LV electron microprobe equipped with wavelength- dispersive spectrometer (Oxford Instruments Wave 700) at the University ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... ve common domain vocabulary. This means that all terms used within a domain need to be standardized, with a clear and unambiguous definition, accompanied by lexical and semantic relations with other terms. Examples are relations established between general and more specific terms, such as "coal ...
    ... allows researchers and other users to browse content tagged with subject terms from their taxonomy. Besides improving their performance using ICT, companies within Serbian mining industry are also striving towards advancing collaboration with their business partners’ networks both within the country ...
    ... occurrence and the number of injured workers, with a detailed description of the injury and the safety measures. 13th ISCSM 2016 BELGRADE 5 An electronic questionnaire records whether the workplace at which the worker was injured is classified as one with special conditions, whether all regulations ...

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... n experiments were conducted on a Gemini S (Oxford Diffraction) four-circle diffractometer equipped with a Mo-anode sealed tube and a Sapphire3 CCD detector. Diffraction data were processed with the CrysAlisPro.17 The synthesized pro- ducts were tested using X-ray powder diffraction (XRPD). A small ...
    ... Reid19 in combination with an empirical absorption correction using spherical harmonics (implemented in SCALE3 ABSPACK scaling algorithm) were applied during the data reduction. The structure of K3EuSi2O7 crystallizes in space group P63/mcm. Since it is isostructural with K3ErSi2O7,15 atomic c ...
    ... ral with disilicates K3ErSi2O7 15 and K3YbSi2O7. 22 The crystal structure is comparable to the sorosilicate structure type reported earlier by Vidican and co-authors.13 The crystal structure of the title compound consists of Si2O7 groups and EuO6 polyhedra which form a 3D framework with potassium ...

  • Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)
    oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem
    ... fault gouge. Faults measured in outcrops are located within or correlated with faults at map-scale with the same kinematics. Their genetic interpretation follows the stereonet legend: 1 - faults parallel with the main map-scale dextral strike-slip fault, 2 - clockwise rotated dextral strike-slip faults ...
    ... orientation (S7–9, S13, Fig. 4), associ- ated with obliquely oriented, clockwise rotated dextral faults, splays or conjugated sinistral faults (S7 and S13, Fig. 4). Further south, defor- mation associated with the Timok Fault is partitioned in two areas, associated with different sets of structures. The first ...
    ... gouge associated with the Sokobanja-Zvonce and Rtanj-Pirot strike-slip faults. The location of the map is displayed in Fig. 2. Faults covered by Neogene sediments or faults with unclear prolongation are dashed. Numbered structures in stereonets correspond to map-scale structures with the same number ...

  • Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy

    Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana (2021)
    ... followed with smaller amounts of quartz, feldspar and iron oxy/hydroxides and large calcite grains, which is consistent with the previously reported data (MILOŠEVIĆ et al., 2019). Sample 1 was prepared by the traditional coiling method on a hand rotated wheel, while sample 2 was made with the ...
    ... Ground mass is a clay mixture uniformly distributed with larger, mostly rounded pores, consistent with microscopical observations. Sample 2 has a fluid- like structure where both groundmass and pores have a directional appearance, consistent with previous observations, and a slightly higher amount ...
    ... Representative List of the Intangible Cultural Heritage of Humanity. In technological terms, it is a unique phenomenon that actively coexists with discovery of new techniques and production processes. This brings to a rise in imitations of this pottery manufacture due to its enlarged popularity ...

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić (2019)
    Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...
    мио-плиоценска геодинамика, јужни Панонски басен, Авалски и Торлак хорст, Белопоточки трог, Србија
    ... mentioned observed vertical movements along the block structures, a composite hilly relief with dominant the Torlak Hill and the Beli Potok Valley was formed. 2015). Seven million years later, Lake Pannon was filled with la- custrine and fluvio-deltaic sediments derived from the surround- ing orogenic belts ...
    ... plane or fault trace were performed and used to support the above-mentioned stratigraphic results with structural and geomorphologic observations in the relief. The scarce data was supplemented with the DEM terrain model and these interpretations were further connected to the previously pub- lished ...
    ... the Badenian Stage. According to the same author, they are in tectonic contact with gray, Badenian marine clays characterized by an abundant micro- and macrofauna. STEVANOVIĆ (1970) equated those conglomerates with the youngest member of the Vrdnik Series (Fruška Gora), i.e. the Budafa conglomerates ...

  • Effects of external noise on threshold-induced correlations in ferromagnetic systems

    Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević (2021)
    Изингов модел, праг детекције, екстерни шум

  • A WordNet Ontology in Improving Searches of Digital Dialect Dictionary

    Miljana Mladenović, Ranka Stanković, Cvetana Krstev (2017)
    In this paper, we present a method for automatic generation of a digital resource, which connects all indirect synonyms of a dialect term to all indirect synonyms of a corresponding term in the standard language, aiming to improve the search of a digital dialect dictionary. The method uses SWRL rules defined in the Serbian WordNet ontology to identify sets of synonymous words. It also uses e-dictionaries to produce correct lemmas in standard language that users usually employ in searches. ...
    ... this paper we propose a method which enables search not only with one term in the standard language, but with a set of synonym terms in order to improve search. 3 Resources 3.1 Use of morphological e-dictionaries The first problem with search of verbs in dialect dictionary is the grammatical form ...
    ... compared results obtained by the system with those produced by humans and achieved the accuracy of 89.7%. Keywords: dialect dictionary, ontology, WordNet, e-dictionary, South Serbian dialect 1 Introduction The study of dialects has received a new impulse with the development of many software tools ...
    ... need not be the case for user not familiar with a dialect. This problem often encountered by students of a foreign language can be solved by explaining terms not known in a foreign language by expressing the same con- cepts in a language they are familiar with. Two other ways of search (search by creating ...

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • 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
    ... 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 ...
    ... references, and links to software. The search offers feedback with appropriate concordances. Mathematical formulae are converted to LaTex and then indexed. User requests are also converted to LaTex, and the search proceeds as with ordinary text. Another relevant project is MathGo! that provides ...
    ... tion and vector representation, with special attention paid to the search of mathematical topics using clusters and relevance ranking. The system provides ranked listing of results, through a user friendly interface, which allows seamless interaction with users through a simple query mechanism ...

  • Threshold-induced correlations in the Random Field Ising Model

    Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević (2018)
    Multidisciplinary
    ... decreases with threshold, the cuto� waiting time Tw,0 increases with Vth. �is is shown in the bottom inset of Fig. 2a, where one can see that the relation ∼ δT Vw,0 th is satis�ed with δ ≈ 1.30 ± 0.02. Regarding the shape of distributions D(Tw), one can see that the power law part appears with the increase ...
    ... decreases with threshold, the cutoff waiting time T,,o increases with V,,. This is shown in the bottom inset of Fig. 2a, where one can see that the relation T,, . ~ ‘is satisfied with 6~ 1.30 + 0.02. Regarding the shape of distributions D(T,,), one can see that the power law part appears with the increase ...
    ... distributions D(S) of size S obtained in simulations of 3D RFIM systems with a single value of lattice size L = 1024 and disorder R = 2.25 Figure 1. �resholding of RFIM signal. �e signal is obtained in simulations of 3D system with size L = 1024 and 40 random �eld con�gurations for each disorder R. (a) ...

  • Developing Students’ Mining and Geology Vocabulary Through Flashcards and L1 in the CLIL Classroom

    Lidija Beko, Ivan Obradović, Ranka Stanković (2015)
    ... suggested that explicit vocabulary teaching along with flashcards should be a part of regular language classroom as an effective way to teach and memorize a great amount of words (Fitzpatrick, Al- Qarni, and Meara 2008, 239; Nation 2001). Explicit learning with flashcards falls into the category of deep ...
    ... ready-made language, available through flashcards, we are saving our limited processing capacity for dealing with other cognitive tasks. If this position holds then computer assisted learning with computer flashcards has a considerable role to play. 3. FLASHCARDS The original intent of our flashcard ...
    ... both Serbian and English with the definitions and bibliography of approximately 2800 words which is available on the webpage http://geoliss.mre.gov.rs/term/. (Stanković et al 2011). Additionally, a terminological resource dubbed RudOnto has also been developed, with the aim of becoming a reference ...

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... of the term with information about it (translations, descriptions, synonyms, acronyms, hypernym concept, hyponym concepts, bibliography). Important preference for OER-s, is the possibility to embed link to specific term. The result is tooltip with a definition and traslation of term with link to the ...
    ... through TEA, which is a considerable advantage for both students and teachers, immediate constructive feedback for learners through ITS, with further enhancements with the development of spoken language technologies. One of the major examples of applied NLP in e-learning are the open-access MOOC 1 ...
    ... laborious teachers’ tasks such as curriculum creation or assignment assessment and do so in a timely manner. Time a teacher can spend with a student is usually very limited, with a detriment to students, resulting in insufficient interaction and feedback. These tools help overcome these hurdles at an advantage ...

  • Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate

    Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić (2015)
    Microemulsion systems with water, toluene and nonionic surfactants are interesting for application due to the excellent solvent properties of aromatic hydrocarbons. In this study, the pseudo-binary phase diagram (“fish-diagram”) of such a ternary system was investigated using a branched technical alkyl polyethoxylate. Lutensol ON 50 (i-C10E5) was considered a suitable surfactant. The system with technical branched i-C10E5 exhibits very long, and for compositions near optimum solubilization, i.e., the minimum content of surfactant needed for a bicontinuous microemulsion, extremely long ...
    микроемулзија, толуен, оксоалкохол етоксилат, термодинамичка стабилност, тернарни фазни дијаграми, дијаграми „fish“

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... sample was mixed with 2 L of distilled water in a beaker. Using a magnetic stirrer, the mixture was stirred for 2 h at ~45%C, allowed to settle for 2 h at the same tempera- ture and filtered through filter paper. The filtrate was then heated in another beaker at 90*C, stirred with a magnetic stirrer ...
    ... the same temperature, allowing excess calcium sulfate to crystallize. Recrystallized gypsum was filtered and washed with boiling distilled water. The supernatant liquid was mixed with the phosphogypsum from the first beaker. This cycle was repeated several times until the PG1 sample was reduced to ...
    ... subjected only to chem- ical characterization using scanning electron microscopy with energy-dispersive spectrometry (SEM-EDS). Scanning electron microscopy SEM-EDS analysis was performed using a JEOL JSM-11300 SEM coupled with an Oxford Instruments XMax 50 mm? silicon drift detector energy-dispersive ...

  • Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia

    Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović (2024)
    lokalni putevi, prirodni hazardi, otpornost na klimatske promene, MaPLoRds

  • Flyrock induced by blasting in surface mining

    Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac (2022)
    Miniranje predstavlja i dalje najefikasniji i najjeftiniji način eksploatacije velikih količina čvrstih mineralnih sirovina na površinskim kopovima. Energija eksplozije se koristi za fragmentaciju čvrste stenske mase do zahtevane granulacije. Pored pozitivnih efekata miniranja, postoje i određeni neželjeni efekti svakog procesa miniranja koji se mogu javiti, a to su: potresi tla, razletanje komada stene, vazdušni udari, otrovni i zagušljivi gasovi i prašina. Razletanje komada stene je nekontrolisano izbacivanje fragmenata odminirane stenske mase i predstavlja jedan od glavnih izvora materijalne štete ...
    razletanje, bušenje, miniranje, površinska eksploatacija, bezbednost, nesreća

  • Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking

    Ranka Stanković, Milica Ikonić Nešić, Olja Perisic, Mihailo Škorić, Olivera Kitanović (2024)
    U radu se prikazuju rezultati istraživanja vezanih za pripremu paralelnih korpusa, fokusirajući se na transformaciju u RDF grafove koristeći NLP Interchange Format (NIF) za lingvističku anotaciju. Pružamo pregled paralelnog korpusa koji je korišćen u ovom studijskom slučaju, kao i proces označavanja delova govora, lematizacije i prepoznavanja imenovanih entiteta (NER). Zatim opisujemo povezivanje imenovanih entiteta (NEL), konverziju podataka u RDF, i uključivanje NIF anotacija. Proizvedene NIF datoteke su evaluirane kroz istraživanje triplestore-a korišćenjem SPARQL upita. Na kraju, razmatra se povezivanje Linked ...
    paralelni korpusi, povezivanje imenovanih entiteta, prepoznavanje imenovanih entiteta, NER, NEL, povezani podaci, NIF, Vikipodaci

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge