Претрага
2182 items
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Threshold-induced correlations in the Random Field Ising Model
... avalanches i and j and remain below Vth (note that this sequence may be empty), and Tini(j; Vth) is the time taken by the avalanche j to rise from zero to Vth. In the main panel of Fig. 1b, we show the distributions D(T) of duration T, and in the inset - distributions D(S) of size S obtained in simulations ...
... 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) For a (blue) part of a train of avalanches (shown in bottom, and zoomed in top panel) and the imposed ...
... is obtained in simulations of 3D system with size L= 1024 and 40 random field configurations for each disorder R. (a) For a (blue) part of a train of avalanches (shown in bottom, and zoomed in top panel) and the imposed threshold V,, (red line), we illustrate: the determination of size S and duration T ...Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević. "Threshold-induced correlations in the Random Field Ising Model" in Scientific Reports, Springer Science and Business Media LLC (2018). https://doi.org/10.1038/s41598-018-20759-6
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A survey of greenhouse gases production in central European lignites
Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)... half of all lignite is mined and utilized in Europe (Knoema, 2020). The extraction and combustion of coal pollutes water, soil, and espe- cially the atmosphere. Air pollution generated by the mining industry has both a local (particulate matter, sulphur and nitrogen oxides) and a global impact (greenhouse ...
... deposits mainly occur in the western, southern and central parts of the country and were formed in epeirogenic depressions from the Palaeocene up to the Upper Miocene (Fig. 1). Polish lignites repre- sent humic low rank coal. Industrial exploitation is performed mainly in the Lower and Middle Miocene formations ...
... (Zechstein) evaporites. Palaeogene and Neogene filling of the graben is underlain by Upper Jurassic limestones and Upper Cre- taceous gaizes. The productive coal complex is considered to be an equivalent of ŚLS-3 (in the lower part) and LLS-2 (in the upper part) (Pawelec and Bielowicz, 2016; Widera, 2016b) ...Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska. "A survey of greenhouse gases production in central European lignites" in Science of The Total Environment, Elsevier (2021). https://doi.org/10.1016/j.scitotenv.2021.149551
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Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)
Nikita Bragin, Nevenka Đerić (2020)... common and wide spread in the territory of western and southwestern Serbia. Meso zoic radiolaria are found in pelagic and hemipelagic sediments deposited on the Neo-Tethys ocean floor, intercalated between Triassic shallow-water carbonate ramp and platform sediments, and are widespread in Jurassic ...
... mélange and Sirogojno Mélange), and belong to the parautoch thonous sequences between the Drina–Ivanjica Unit to the east and the East Bosnian Durmitor Unit to the west (GAWLICK et al., 2017). 3. SECTION DESCRIPTION AND BIOSTRATIGRAPHY The studied section is located in Donji Ljubiš Village and starts ...
... species also in association with younger radiolarians in several samples indicat ing that this species may also be present in younger deposits – Callovian and even in the lower Oxfordian (GAWLICK, pers. comm.). Other taxa have broad stratigraphic ranges: Helveto- capsa matsuokai was found in the middle-late ...Nikita Bragin, Nevenka Đerić. "Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)" in Geologia Croatica, Croatian Geological Survey (2020). https://doi.org/10.4154/gc.2020.11
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From post-disaster landslides inventory to open landslides data
Biljana Abolmasov, Miloš Marjanović, Uroš Đurić, Jelka Krušić. "From post-disaster landslides inventory to open landslides data" in Proceedings of 3rd European Regional Conference of IAEG/ Athens/ Greece/ 6-10 October 2021, International Association for Engineering Geology and the Environment (2021)
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Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia
... sediments and Cenozoic igneous rocks. The area covered by this study belongs to the West Vardar and Jadar-Kopaonik units semsw Schmid et al. (2008). In this 160 km long strip we sampled on the north in the wider Rudnik Mts. area seven localities of Late Cretaceous micritic limestones and one locality ...
... carried out on locality (when applicable) and regionallevel. The obtained results show that the remanent magnetization both in the igneous rocks and sediments resides in magnetite. The locality mean directions for Late Cretaceous sediments are well defined and the remanenceis of post tilting: age. For ...
... of flysch and seventeen sites of Oligocene-Earliest Miocene igneous rocks of different composition. In the south, ın the wider Kopaonik Mts. Area we sampled cight sites of dacitoandesites andfifteen localities of granodiorites both of Oligocene age. Samples were drilled and oriented in situ both by ...Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Jovanović. "Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia " in Environmental, Structural and Stratigraphical Evolution of the Western Carpathians, 11th ESSEWECA Conference, Geophysical Institute, Slovak Academy of Sciences Bratislava (2018)
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Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement
Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić,. "Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement" in International scientific conference Challenges in Applied Geology and Geophysics: 100th Anniversary of Applied Geology at AGH University of Science and Technology, Book of abstracts, Kraków, Poland, 10-13. Sep. 2019, Kraków, Poland : AGH University of Science and Technology (2019)
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... K3EuSi2O7, has been synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in the space group P63/mcm. In the crystal structure of the title compound, one part of the Eu cations are in a slightly distorted octahedral coordination and the other part are in an ideal trigonal prismatic ...
... 350 EDS detector. Synthesis and crystallization The following chemicals were used in the high-temperature flux synthesis experiment: Eu2O3 (Sigma-Aldrich, 99.99 %), SiO2 (Merck, p.a.) and KF (Centrohem, 99 %). A total of 0.055 g of a mixture of Eu2O3 and SiO2 in a molar ratio of 1:4 was added ...
... homogenized in an agate mortar, transferred to a platinum crucible covered with a platinum lid and placed in a resistance-heated furnace. The mixture was heated to 1173 K at a rate of 200 K/h and kept for 10 h at that temperature. The temperature was lowered to 973 K at a rate of 2 K/h and then the ...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
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Distribution of Uranium and Rare Elements in Radioactive Phosphate-Bearing Anomalies in Southeast Mongolia
Boris Vakanjac, Neil Rutherford, Vesna Ristić Vakanjac, Tanita Đumić, Suzana Đorđević Milošević (2020)Soviet and Mongolian geologists initiated geological exploration of Mongolia for minerals after World War II (1945). These activities lasted until the breakup of the USSR in 1991. As part of this exploration systematic uranium and rare element exploration was undertaken across Mongolia. New exploration resumed in Mongolia at the beginning of the 21st century for a range of ore and mineral deposit styles including uranium, coal, base and precious metals and Fe-ore. This was generally undertaken by Western-based companies. This ...Boris Vakanjac, Neil Rutherford, Vesna Ristić Vakanjac, Tanita Đumić, Suzana Đorđević Milošević. "Distribution of Uranium and Rare Elements in Radioactive Phosphate-Bearing Anomalies in Southeast Mongolia" in Minerals, MDPI AG (2020). https://doi.org/10.3390/min10040307
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The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system
Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми... carbon atoms in the hydrocarbon chain and is the average number of glucose units in the hydrophilic headgroup. The nonionic surfactants, -alkyl poly- glycol ethers (CE) are typically used. These surf- actants contain / carbon atoms in the hydrophobic alkyl chain and / ethoxy units in the hydrophilic ...
... of a middle-phase microemulsion in equilibrium with excess phases of oil and water, surrounded by two-phase regions illustrated as 20 and 20 . When a surfactant is mainly dissolved in water and two phases consist of a surfactant-rich water (lower) phase in equilibrium with an excess oil ...
... sugar and vegetable oil feed- stocks [13], and potential use in a large number of industrial applications [14-19]. One potential use of sugar surfactants is in microemulsion formulations. Making microemulsions with alkyl polyglucosides is difficult owing to the low surfactant solubility in many ...Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic. "The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system" in Chemical Industry and Chemical Engineering Quarterly, National Library of Serbia (2016). https://doi.org/ 10.2298/CICEQ141105015I
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Mine ventilation system planning using genetic algorithms
The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methodsNikola Lilić, Ranka Stanković, Ivan Obradović. "Mine ventilation system planning using genetic algorithms" in 6. international symposium on mine planning and equipment selection, Ostrava (Czech Republic), 3-6 Sep 1997, A.A. Balkema, Rotterdam (Netherlands) (1997)
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NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands
Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić. "NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands" in Inorganica Chimica Acta, Elsevier BV (2012). https://doi.org/10.1016/j.ica.2012.09.016
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Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo
Aleksandar Madžarević, Pavle Janković (2022)Oblast primene prirodnog gasa je veoma široka. Kao energent može se koristiti za proizvodnju energije u elektranama, toplanama i postrojenjima za kombinovanu proizvodnju energije ili za zadovoljavanje različitih toplotnih potreba u industriji i širokoj potrošnji. Gas se može upotrebiti i kao sirovina u hemijskoj i petrohemijskoj industriji, a tokom poslednjih decenija nalazi primenu i u saobraćaju kao pogonsko gorivo u SUS motorima. Sa ekološkog stanovišta, prirodni gas predstavlja najprihvatljiviji izvor energije u poređenju sa drugim fosilnim gorivima. Pri sagorevanju ...Aleksandar Madžarević, Pavle Janković. "Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo" in Međunarodni Kongres o procesnoj industriji - PROCESING '22, Beograd : SMEITS, Društvo za procesnu tehniku (2022)
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Synthesis, magnetic, thermal and structural properties of Co(II), Ni(II) and Cu(II) complexes containing isophthalato ligands
A series of novel ternary Co(II), Ni(II) and Cu(II) complexes containing 2,20-dipyridylamine (dipya), 2,20-bipyridine (bipy), and 1,10-phenanthroline (phen), as aromatic diamine ligands, and dianion of isophthalic acid (ipht) have been prepared by ligand exchange reactions from diluted H2O/EtOH solutions. The complexes were characterized by elemental analysis, IR spectroscopy, magnetic susceptibility measurements and TG and DSC analysis. Three complexes, Cu(dipya)(ipht)H2O (1), Co(dipya)(ipht)2H2O (2) and Cu(ipht)(phen)2H2O (5) are polymeric with bis-monodentate ipht, while the other two complexes M(bipy)(ipht)4H2O, M@Co(II) (3) and ...комплекси прелазних метала, карбоксилатни лиганди, N-лиганди, кристална структура, магнетна својстваJelena Rogan, Dejan Poleti, Ljiljana Karanović, Zvonko Jagličić. "Synthesis, magnetic, thermal and structural properties of Co(II), Ni(II) and Cu(II) complexes containing isophthalato ligands" in Journal of Molecular Structure, Elsevier BV (2011). https://doi.org/10.1016/j.molstruc.2010.11.024
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The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA
Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski. "The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA" in Inorganica Chimica Acta, Elsevier BV (2017). https://doi.org/10.1016/j.ica.2017.07.012
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Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... MAPEi, (30) MAPEi and AMAPE are represented in Table 10. Energies 2021, 14, 3710 15 of 20 Within the grouping step, we only have signal and noise components and we use two groups of indices, I; = {Avy,,Ay, } and Iz = {Av,,Ay, } and associate the group I; with signal component and the group I with noise ...
... point over observed and forecasted periods. A computational process is performed in the Numerical Example section to repre- sent the possibilities of model and conclusions are provided in the Results and Conclusion section. Obtained results show a high level of correlation of original and reconstructed series ...
... signal and noise components and we use two groups of indices, I1 = { λV1 , λV2 } and I2 = { λV3 , λV4 } and associate the group I1 with signal component and the group I2 with noise. The reconstructed series of x coordinates of the marker M1 composed of the signal components are represented in Table ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
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Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material
Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, PyrophylliteBorislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić. "Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material" in Applied Surface Science, Elsevier BV (2022). https://doi.org/10.1016/j.apsusc.2022.155114
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Fluid inclusion systematics in the Okoška gora polymetallic deposit
... addition, the S2 and Q2 inclusions follow the growth zonesofthe crystals, indicating the simultaneouscrystal growth and fluid nclusion entrapement. Conversely, thc itregular, needle-like, and ameboid inclusions ofQ1 and S1 occur in linear, subparallel structures and have a higher proportion of liquid ...
... sericite and adularia. The predominantminera! style is stockwork breccia with open-space veins and abundantdruse-lined cavities fill terminated crystals of gangue and ore minerals. Ore disseminations are minor and. restricted to pyrite. Ore minerals have not been observedto replace the host-rock. In | cast ...
... inclusions in sphalerite and quartz from five samples of ore were investigated in this study. Both types of quartz form well-developed euhedral c whereas sphalerite forms euhedralcrystals or fills the open spaces between pre-existi and gangue minerals. Sphalerite is honey yellow or dark brown in color and ...Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec. "Fluid inclusion systematics in the Okoška gora polymetallic deposit" in 25th meeting of Slovenian geologists, Ljubljana, 2021, Univerza v Ljubljani, Oddelek za geologijo (2021)
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Connections between the Levant and the Balkans in the late Middle Pleistocene: Archaeological findings from Velika and Mala Balanica Caves (Serbia)
Dušan Mihailović, Steven L. Kuhn, Katarina Bogićević, Vesna Dimitrijević, Ana B. Marín-Arroyo, Jelena Marković, Norbert Mercier, Bojana Mihailović, Mike W. Morley, Predrag Radović, William J. Rink, Senka Plavšić, Mirjana Roksandić (2022)Major changes in the technological, economic, and social behavior of Middle Pleistocene hominins occurred at the onset of the Middle Paleolithic, 400e200 ka. However, until recently it was not possible to establish when, where, and how certain forms of Middle Paleolithic behavior appeared and spread into Southeastern Europe, mainly owing to gaps in the Paleolithic record. Here we report new results of dating, material culture, and the archaeological context of finds from the Balanica Cave Complex in Sicevo (Serbia). ...Dušan Mihailović, Steven L. Kuhn, Katarina Bogićević, Vesna Dimitrijević, Ana B. Marín-Arroyo, Jelena Marković, Norbert Mercier, Bojana Mihailović, Mike W. Morley, Predrag Radović, William J. Rink, Senka Plavšić, Mirjana Roksandić . "Connections between the Levant and the Balkans in the late Middle Pleistocene: Archaeological findings from Velika and Mala Balanica Caves (Serbia)" in Journal of Human Evolution (2022)
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Softverski alati za korišćenje resursa za srpski jezik
Ivan Obradović, Ranka Stanković (2008)... used in practice and over time appeared in the resources, starting with the Aurora code, followed by the ISO 8859-2 and ISO 8859-5 codes, up to Unicode. Thus the WS4LR software tool was created, which repre- sents and integrated and adaptable software solu- tion, enabling the management and manipulation ...
... text processing using dictionaries in LADL format. But since Intex did not enable processing of texts in Unicode and this coding scheme became more and more frequently used, the Unitex2 and Nooj3 system were developed, both allowing processing in Unicode, and sub- sequently started to suppress Intex ...
... “highlighting”, namely by repre- senting them in blue, in order to make them more easily recognizable in the text. The text in Eng- lish is on the left hand side, and the correspond- ing text in Serbian on the right. Results obtained by searching aligned texts with bilingual queries can be used for different ...Ivan Obradović, Ranka Stanković. "Softverski alati za korišćenje resursa za srpski jezik" in INFOteka: časopis za informatiku i bibliotekarstvo, Belgrade, Serbia : Zajednica biblioteka univerziteta u Srbiji (2008)
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From ELTeC Text Collection Metadata and Named Entities to Linked-data (and Back)
In this paper we present the wikification of the ELTeC (European Literary Text Collection), developed within the COST Action ``Distant Reading for European Literary History'' (CA16204). ELTeC is a multilingual corpus of novels written in the time period 1840—1920, built to apply distant reading methods and tools to explore the European literary history. We present the pipeline that led to the production of the linked dataset, the novels’ metadata retrieval and named entity recognition, transformation, mapping and Wikidata population, ...Milica Ikonić Nešić, Ranka Stanković, Christof Schöch and Mihailo Škorić. "From ELTeC Text Collection Metadata and Named Entities to Linked-data (and Back)" in Proceedings of The 8th Workshop on Linked Data in Linguistics within the 13th Language Resources and Evaluation Conference, June 2022, Marseille, France, European Language Resources Association (2022)