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687 items
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Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication
... collection. Smooth shells represent only approximately 10% of the collection. The aforementioned circumstances make it possible to measure the dimensional parameters of the shells on one dimension only and, on the ribbed shells, to count the number of ribs lying at the umbilicus and outside of the ...
... are not evident in the Serbian specimen. A related species, also in terms of size, is Hypo- lissoceras subtilior (Zittel, 1870). It differs in dimensional parame- ters, especially in the greater width of the umbilicus. Distribution. This species is probably known only from the Stramberk Limestone ...
... demonstrate that Ps. fasciculatus has denser ribs than Ps. lorioli because the ribs of the latter species have wider intercostal spaces. Among the dimensional parameters reported by Arkadiev and Bogdanova (2012), the lower H/D value differs somewhat from the Serbian specimen. Distribution. Jacobi Zone ...Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović. "Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication" in Cretaceous Research (2023). https://doi.org/10.1016/j.cretres.2023.105623
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Geotechnical aspects of three dimensional stability analysis of landslides
Ćorić Slobodan, Čaki Laslo, Rakić Dragoslav, Ubiparip Boško, Berisavljević Zoran. "Geotechnical aspects of three dimensional stability analysis of landslides" in Planning, design, construction and renewal in the civil engineering : proceedings / 12 International Scientific Conference INDIS 2012, Novi Sad, 28-30 November 2012, Novi Sad:Faculty of Technical Sciences, Department of Civil Engineering and Geodesy (2012): 361-368
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Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...... and altered dacite and the transition zone between these two rock materials. Based on the dependence of the constant mi and the altered dacite (AD%) volumetric participation (Figure 17), the overall interval of the mi value can be divided into two intervals. The first interval includes values for 0% to ...
... = 26 ± 6. The overall interval of constant mi values refers to dacite and altered dacite and the transition zone between these two rock materials and can be divided into two intervals. Namely, for the first interval (0% to 30% of AD), it is possible to define the value of the constant mi = 28 ± 3, which ...
... Suggested Methods for Determining the Uniaxial Compressive Strength and Deformability of Rock Materials. Int. J. Rock Mech. Min. Sci. 1979, 16, 135–140. 19. Suggested methods for determining the strength of rock materials in triaxial compression. Int. J. Rock Mech. Min. Sci. Géoméch. Abstr. 1978, 15, 47–51 ...Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović. "Determination of Mechanical Properties of Altered Dacite by Laboratory Methods" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11080813
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A transient three-dimensional numerical model of water impermeable screen effects on the groundwater inflow reduction into the mine (Case Study: Open pit mine Drmno, Serbia)
Šubaranović Tomislav, Polomčić Dušan, Pavlović Vladimir, Pakić N. "A transient three-dimensional numerical model of water impermeable screen effects on the groundwater inflow reduction into the mine (Case Study: Open pit mine Drmno, Serbia)" in Proceedings on CD-ROM [Elektronski izvor]. Vol. 1-2 / 11th International Conference Research and Development in Mechanical Industry - RaDMI 2011, 15-18. September 2011, Sokobanja, Serbia, Vrnjačka Banja:Scientific and Technical Center for Intellectual Property (2011): 1257-1265
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Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research
магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија... ARCHAEOLOGY. INTRODUCTION The diff erences in the physical properties of the subsurface materials are the basic prerequisite for the application of geophysical methods to be successful. The use of iron-based materials during human history allows for the successful application of magnetometry, which is ...
... vantage of this instrument is its ability to measure the gradient of Total Magnetic Intensity (TMI), which is achieved by using two identical probes. By measuring TMI on two coupled probes in the same time interval, allows the avoidance of varia- tions of TMI in the base survey. Also, another important ...
... traverse, an er- ror of 2m can be regarded as a common error for each traverse. In the case when the distance be- tween two adjacent profi les is 1 m (in archaeology the distance between two adjacent profi les is often less than 1m), this error can result in the complete fl ecking of the anomalies, such ...Mirko Petković, Vesna Cvetkov, Branislav Sretenović. "Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research" in Arheologija i prirodne nauke (2014)
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Investigation of nanostructured Ca0.9Er0.1MnO3 obtained by sucrose nitrate procedure
Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)... Ceramic Society Institute of Technical Sciences of SASA Institute for Testing of Materials Institute of Chemistry Technology and Metallurgy Institute for Technology of Nuclear and Other Raw Mineral Materials PROGRAM AND THE BOOK OF ABSTRACTS Serbian Academy of Sciences and Arts, Knez Mihailova ...
... Serbian Ceramic Society Institute of Technical Sciences of SASA Institute for Testing of Materials Institute of Chemistry Technology and Metallurgy Institute for Technology of Nuclear and Other Raw Mineral Materials PROGRAM AND THE BOOK OF ABSTRACTS Serbian Academy of Sciences and Arts, Knez Mihailova ...
... sintering technique.The analysis of the determination of the stress intensity factor includes experimental and numerical tests. For this purpose, two geometries of specimens were used. Flat specimens with crack loaded in tension and ring specimens loaded on the inner wall. To understand the influence ...Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić. "Investigation of nanostructured Ca0.9Er0.1MnO3 obtained by sucrose nitrate procedure" in Program ; and the Book of abstracts The Eleventh Serbian Ceramic Society Conference »Advanced Ceramics and Application« September 18-20, 2023 Serbian Academy of Sciences and Arts, Belgrade, Serbia , Belgrade : Serbian Academy of Sciences and Art Serbia (2023)
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Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites
Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković. "Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites" in Science of Sintering (2023). https://doi.org/10.2298/SOS220512013S
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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Effects of external noise on threshold-induced correlations in ferromagnetic systems
Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević. "Effects of external noise on threshold-induced correlations in ferromagnetic systems" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.062114
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Hydrochemical indicators of groundwater flow in the area of “Čukaru Peki” Cu-Au underground mine in eastern Serbia
The physical and chemical properties of groundwater, together with the groundwater levels regime and rock hydraulic properties, are often used to understand and conceptualize the hydrogeological system. Prediction of the influence of mining works on groundwater, and vice versa, is a challenge due to significantly altered groundwater flow patterns in the raw materials exploitation areas in relation to natural conditions. Therefore, multiple parameters are assessed and monitored before and during exploitation to properly characterize and quantify the system for ...Nebojša Atanacković, Vladimir Živanović, Jana Štrbački, Veselin Dragišić, Ivana Cvejić. "Hydrochemical indicators of groundwater flow in the area of “Čukaru Peki” Cu-Au underground mine in eastern Serbia" in 5th IAH CEG conference, Slovenian Committee of International Association of Hydrogeologists - SKIAH (2022)
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Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal
Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo... performed in laboratory conditions. 2. Materials and Methods Chemicals that were used in this study were of high purity and supplied from Sigma Aldrich, Darmstadt, Germany. 2.1. Synthesis of the Samples Synthesis of activated carbon materials was performed in two steps. At first, required amounts of ...
... low-cost adsorbents with good adsorption capacities for both organic and inorganic pollutants such as methylene blue or heavy metals. For example, natural materials of both an organic and inorganic nature, such as alginate, chitosan, zeolites, clays, biomaterials, etc. are classified as adsorbents with potential ...
... and broad peaks between 2θ value ~26◦ and ~44◦ are visible. That is characteristic for materials with an amorphous structure and is ascribed to typical graphitic (002) and (100) planes. The broadening of the two peaks suggests the low graphitization degree and the presence of amorphous carbon in all ...Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović . "Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal" in Minerals, MDPI (2018)
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Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)
Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović. "Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)" in Materials, MDPI AG (2024). https://doi.org/10.3390/ma17040820
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Building learning capacity by blending different sources of knowledge
... technologies and methods. The initial OER materials in BAEKTEL are published by universities and enterprises of the Western Balkans (WB), mostly in WB languages, which belong to "small" but closely related languages. However, educational materials in "big" languages such as English and Russian ...
... audience of potential learners, educational materials need to be of high quality and readily available. In this context, training by qualified OER trainers for both academic institution and enterprise staff involved in production of OER materials will be provided. The third objective of ...
... of the project is to produce course materials in several different languages, in various forms such as videos, audio streams and written material. In order to facilitate the use of these materials in a multilingual environment, a language support system is integrated into the BMP, consisting mainly ...Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić. "Building learning capacity by blending different sources of knowledge" in International Journal of Learning and Intellectual Capital (2016). https://doi.org/10.1504/IJLIC.2016.075698
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Using Metadata For Content Indexing Within An OER Network
Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)... providing teaching, research and learning materials under an open source licence that permits their free use, access, repurposing, reuse and redistribution by others with limited or no restrictions is rapidly gaining popularity [1].Based on these two facts, the BAEKTEL (Blending Academic and ...
... entrepreneurial knowledge,by enabling higher education institutions to publish various academic learning resources e.g. video lectures, course planning materials, or thematic content, whereasenterprises can present different forms of expert knowledge, such as case studies, expert presentations on specific ...
... Technology Enhanced Learning, http://www.baektel.eu) project was initiated with the main goal of building an OER networkofferingeducational materials by higher education (HE) institutions and best practice examples by enterprise experts. The network is conceived as multilingual, which means ...Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci. "Using Metadata For Content Indexing Within An OER Network" in Proceedings of the Fifth International Conference on e-Learning, eLearning 2014, September 2014, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2014)
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Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia
The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...Jelka Krušić , Biljana Abolmasov, Miloš Marjanović. "Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia" in Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-60706-7_25
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Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery
... for extrusion (Fig. 7a). "The projection of the grain-size results onto a Winkler's diagram (Winkler, 1954) indicates that the two samples are not suitable raw materials for the production of bricks (Fig. 7b). The industrial prop- erties of the CIBd sample, in terms of brick production, might be ...
... village of Zlakusa lacks the proper raw materials to produce high- quality ceramics and pottery. The raw material instead is delivered rom a distance – from the villages of Vranjani and Rupeljevo (Milošević et al., 2019a). It is this careful selection of raw materials that results in the high quality ...
... with relation to a specific production centre can be performed more accurately through investigation of clay materials used in the production of ceramics (Montana et al., 2011). Raw materials such as clays have various industrial and technological applications (Christidis, 2011), but their final a ...Maja Milošević, Biljana Đorđević, Mihovil Logar. "Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery" in Clay Minerals (2020). https://doi.org/10.1180/clm.2020.20
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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 ...... Part of Speech Tagging for Serbian language using Natural Language Toolkit Ranka Stanković, Boro Milovanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Part of Speech Tagging for Serbian language using Natural Language Toolkit | Ranka Stanković, Boro Milovanović ...
... available at: www.dr.rgf.bg.ac.rs Abstract—While complex algorithms for NLP (Natural language processing) are being developed, base tasks such as tagging remain very important and still challenging. NLTK (Natural Language Toolkit) is a powerful Python library for developing programs based on ...
... tagger: 92,52 – 95,76% accuracy for the different tagsets. Index Terms—Natural Language Processing; Machine Learning; Neural Network. I. INTRODUCTION In the last couple of years, a big advancement in the field of Natural Language Processing has occurred. There are state-of- the-art language ...Ranka Stanković, Boro Milovanović. "Part of Speech Tagging for Serbian language using Natural Language Toolkit" in 7th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2020, Academic Mind, Belgrade (2020)
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‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions
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 ...Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban. "‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions" in Boletín de la Sociedad Española de Cerámica y Vidrio, Elsevier BV (2020). https://doi.org/10.1016/j.bsecv.2020.06.005
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Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process
Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker... also accelerated the degradation of PIN two times compared to the DF study within 120 min (64% and 30%, respectively). However, the catalyst did not have expected behavior towards MET and NAD, wherein the degradation rate was almost the same for these two B-blockers (7% and 5%, respectively). ...
... sensitive to the influence of positive charge than the other two molecules. This also suggests that the positively charged h might be responsible for the efficient degradation of the PIN. Since, according to the ALIE descriptor, the other two molecules are not sensitive to positive charge as the PIN ...
... Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, 21000 Novi Sad, Serbia 2 · Centerfor Solid State and New Materials, Institute of Physics Belgrade, 11000 Belgrade, Serbia Laboratory of Crystallography, Faculty of Mining, and Geology, University of Belgrade, Đušina ...Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković. "Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process" in Molecules, MDPI AG (2023). https://doi.org/10.3390/molecules28020655
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... Thus, the crystal structure of this compound, K3EuSi2O7, has not been described in the literature so far. EXPERIMENTAL Materials and measurements All the materials were of analytical reagent grade and used as received without further purification. The crystal structure of K3EuSi2O7 was analyzed ...
... OnLin e Fir st 6 KOVAČ et al. The structure is characterized by two crystallographically distinct six- coordinated sites occupied by Eu1 and Eu2: Eu1O6 is an octahedron (OC-6) and Eu2O6 is a trigonal prism (TPR-6). Two types of polyhedra around europium cations are distinguished by a small ...
... of a wide range of optical and magnetic properties combined with high thermal stability.1‒9 All this makes them very interesting and promising materials for different applications. REE silicates also exhibit a broad structural diversity.10 A highly adaptive framework can incorporate almost all REEs ...Sabina Kovač, Predrag Dabić, Aleksandar Kremenović. "Crystal structure of K3EuSi2O7" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC210218026K