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Упит dcterms_subject_txt:the house of algebraic integer

2844 items

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... "Improvement of Lignite Opencast Technology in Order to Increase Energy Efficiency and Occupational Safety" (TR 33039) financed by the Ministry of Education and Science of the Republic of Serbia within the framework of Programme of research in the field of technological development for the period ...
    ... in the direction of operations advancing, on the parts which correspond to the width of the mining blocks (strips). This width is unique for each coal bench and depends on the characteristics of bucket wheel excavator (BWE) engaged on that bench (it matches the actual width of the block ...
    ... technology, as is the case for many coal mines in Serbia. The majority of coal production is used for generation of electricity in power plant. This fact is the main reason why production objectives of coal mine and power plant are strongly connected. Due to the fluctuation of the coal quality, ...

  • Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US

    Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić (2023)
    Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...
    CO2, емисија, угаљ, термоелектрана, САД, ЕУ-27
    ... Figure 4 shows the diagram of the total production of electricity in the countries of the European Union, as well as the generation of electricity from coal, as well as the share of coal in the energy mix of annual production. It remains an indisputable fact that the problems of climate change ...
    ... connection between the level of development of a country or region and the amount of energy consumed in the country. Figure 3 shows the ratio of specific electricity production per capita in the EU-27 and the US. In the last 2 decades, the ! Minor amounts of coal are still consumed in the residential ...
    ... production in USA follows the trend of the rest of the world, increasing year by year, while the share of coal in the same decreases. Figure 5 shows a diagram of the total generation of electricity, electricity generation from coal, as well as the share of coal in it in the USA from 2000. US electricity ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... 2—Determining the Parameters through the Application of Quotient of Products of the Same Number of Reduced Distances and Oscillation Velocities According to this model, determination of the parameter n is based on the quotient of the product of equal number of experimental data of the rock mass oscillation ...
    ... acceleration of the aroused environment. Sizes of these three parameters point to the intensity of the force which caused them, as well as to the degree of danger caused by the shock. The parameter that is most often applied to estimate seismic effect of the blasting is the oscillation velocity of the rock mass ...
    ... parameters affecting its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock material and the type of blasting, the equation of M.A. Sadovskii, where the oscillation velocity v is given in the form of the function, is most frequently used: v = K·R−n ...

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • 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

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... occurring in the same path will have to agree with the value inherited from the third token; hence, in the first case it will have the value f and in the second case the value m. An Approach to Efficient Processing of Multi-Word Units 5 The two possible orders of the adjective and the noun in the MWU are ...
    ... names. As in the case of the first evaluation the results varied depending on the type of data used: for the first data set of general terms the system produced 84.97% of correct results (96.14% if we include partly correct solutions), for the second data set of specific terms 78.01% of correct results ...
    ... for the third to- ken. The occurrence of the same unification variables in the same path means that their values have to agree. If a pattern <$1:Case=$c> appears in the same path as <$3:Case=$c> it means that when the genitive form of the first token is generated then the genitive form of the third ...

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... 617 14 of 15 5. Conclusions To establish the relationship between the oscillation velocity of the rock mass and basic parameters affecting its magnitude, being the amount of explosive, the distance from the blast site, characteristics of the rock mass and the type of blasting, is the equation of M. A ...
    ... Introduction As the relation between the soil oscillation velocity and basic parameters affecting its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock material, and the type of blasting, the equation of M.A. Sadovskii, where the oscillation velocity ...
    ... control the seismic effect of blasting, as well as its planning, it is required to determine the soil oscillation law, with the strike/mining facilities to be protected. One of the most commonly used equations is that of M.A. Sadovskii, defining the law of alteration in the oscillation velocity of the soil ...

  • The Many Faces of SrpKor

    Duško Vitas, Ranka Stanković, Cvetana Krstev (2024.)
    Акроним СрпКор означава фамилију електронских корпуса савременог српског језика чија је изградња почела крајем седамдесетих година прошлога века, а која је постала шире видљива заинтересованој истраживачкој заједници објављивањем његове прве верзије на вебу 2002. године. У овом дугом периоду, посебно пре појаве корисних текстуелних ресурса на вебу, развој корпуса се састојао у прикупљању и обради грађе као и у развоју метода обраде корпуса. Наиме, електронски корпус није само колекција текстова у дигиталном облику (како се то, на пример, наводи ...
    СрпКор, корпуси, српски, лематизација, Лексимирка

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction
    ... query that aims to derive all the names of the concepts and their meshv:treeNumber values. The concept names are derived from the rdfs:label, followed by the mesh:treeNumber of the same concept. The returned concepts are sorted by the size of the name from the longest to the shortest, in order for them ...
    ... by the Dice index into the class whose (only) term occurs most often in it, thus avoiding a large amount of computation and reducing the task to finding the most frequent term in the surrogate of the text. 2 Experiment setting The aim of the experiment was to test the possibility and success of clas- ...
    ... together the list of identifiers and determine the taxonomic position of the concepts used in the documents, as well as the relative position of their nodes in the hierarchy. 2. The conversion of documents into vectors of identifiers using concepts occurring within them. This stage allows the assignment ...

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... tly with the increasing . concentration of HDTMA* cation. All these changes are related to the decreasing of the water content in the interlayer space by increasing the content of HDTMA. The occurrence of the stretching CH vibrations is generally the main difference in the spectrum of HDTMA modified ...
    ... content in the octahedron position. The intercalation of HDTMA* cations into the interlayer space produces redshift of the IR bands that originate from the vibrations of the adsorbed water, as a consequence of the hydrogen bond strength reduction in HDTMA-montmorillonite. Also, the intensity of these ...
    ... place through the interaction between the aromatic benzene ring of S-metolachlor and the aromatic benzene ring of the organic complex (nm-n bonds). Also, the formation of a hydrogen bond occurs between the molecules of S-metolachlor and the molecules of water 329 SERBIAN SOCIETY OF SOIL SCIENCE ...

  • 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
    ... increases the efficiency of the surfactant [3-10]. Alcohol ethoxylate surfactants are widely used for microemulsion applications. The phase behavior with respect to the length of the hydrocarbon tails and the number of ethylene oxide (EO) units depends on the purity of alcohol ethoxylates. The structure ...
    ... considering the extreme hyarophilic nature of the sugar headgroup. The additon of hydrophilic alcoho! ethoxylate (CisEtoo) to the water/toluene/Lutenso! ON 50 system increases the solubiliz- altion capacity of the surfactant, even if the co-surfactant is used in small quan- tities, and shifts the one-phase ...
    ... 14* while stirring the sample. For the water/toluene/Lutensol ON 50 system, the determination of the point of optimum solubiliz- ation of equal masses of water and toluene failed. At high yvalues, a single homogeneous phase (10) was 29 M. ILIĆ efa/: THE INFLUENCE OF ALKYL POLYGLUCOSIDES.. ...

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... occurrences of Lower Triassic sediments in the cores of the anticlinal folds. From the periphery of the basin, the Neogene's basal part descends deeper towards the axial part of the basin structure. The central part of the depression extends in the general direction ENE-WSW, whereby the basin is divided ...
    ... interpretation of the basement of the part of "Valjevo-Mionica" Neogene basin 4.2. Geothermal system According to the geological settings of the terrain and the results of the analyzed parameters, the geothermal system of the Valjevo-Mionica basin belongs to the conductive type within the sedimentation ...
    ... es of part of the Triassic carbonate reservoir were estimated at the base of the Neogene sediment sequence and as maximal expected temperatures. The temperatures at the contact of the Triassic reservoir with the Neogene cover are calculated as a product of the values of geothermal gradients of the ...

  • FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... content in the octahedron position. The intercalation of HDTMA+ cations into the interlayer space produces redshift of the IR bands that originate from the vibrations of the adsorbed water, as a consequence of the reduction of the hydrogen bond strength in HDTMA-montmorillonite. Also, the intensity ...
    ... intensity of these bands decreases significantly with increasing concentration of HDTMA+ cation. All these changes are related to the decreasing of the water content in the interlayer space by increasing the content of HDTMA. The occurrence of the stretching CH2 vibrations is generally the main difference ...
    ... difference in the spectrum of HDTMA modified montmorillonite in comparison with the spectrum of inorganically modified montmorillonite. The wavenumber, intensity and width of these bands are sensitive to conformation in hydrocarbon chains. On the other hand, after the organic modification of the montm ...

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... advantage of MALDI-TOF MS is that no labeling of the substrate is required.35 Briefly, this approach for the determination of the PLA2 activity is based on the quantification of the product (lysolipid) in the MALDI-TOF mass spectra depending on the time of incubation with the enzyme.31,36,37 The data ...
    ... complexes (Fig. 3). The addition of [RuCl,(bipy)2|Cl at a molar concentration of 0.625 x 10°’ M lowered the K,, value of phospholipase A> to 50% of the starting value and when the concentration of the complex was 100-fold higher, the K,, value was lowered to about 10% of the initial value (Fig. 3A). ...
    ... binding sites on the enzyme for [RuCl2(bipy)2]Cl. The nature of interaction of the platinum complex, as well as the mechanism of inhibition of the enzyme activity and its recovery, however, remain to be further studied. Further physiological consequences of the inhibition of the PLA2 activity by transition ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... m fractions of illite in order to constrain the fraction size-dependence of the results. The separated size fractions were analyzed by the K-Ar method (Balogh 1985) in the K-Ar laboratory of the Institute for Nuclear Physics of the Hungarian Academy of Sciences in Debrecen. The potassium content ...
    ... units of the study area from the Paleozoic basement all the way to the Upper Cretaceous (Fig. 2a). The trend of F» fold axes and D» thrusts implies a NE-SW shortening direction for the D> phase (Fig. 2c). The vergence of D» thrusts and asymmetric F. folds are top-SW in the NE part of the study ...
    ... and K/Ar methods. The two parameters show a strong correlation. The trend of the regression line (Fig. 6b) implies that the K/Ar ages become younger with a decrease of the KI values. The decrease in KI values means increase in the change of the crystal structures of the K-white mica min- ...

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... emissions of greenhouse and other gases and substances leads to the necessity of improving efficiency in energy production, transmission, distribution and consumption in the at the global level, or level of the country, region etc 4.  Nowadays the most of attention of is dedicated to reduction of carbon ...
    ... Data on energy consumption: by fuel and by activity are the bases for determination of pollutants emissions. For the case of Serbia data can be found in energy balances of the country 7. The trend and the structure of primary energy consumption for the last ten years are given in Figure 2. In 2017 total ...
    ... Serbia has the highest value of TPES/GDP which indicates the highest energy consumption per unit of produced value and energy intensive industry. In the case of Germany the highest value of emission per capita indicates higher energy consumption per capita, but with higher efficiency of economy. The highest ...

  • 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
    ... flotation of the mine. Tailings of the mine Grot is about 24 ha in area, while the volume of the landfill material in the tailings is about 6 million tons. “ ” the river Korbevečka Figure 1. The geographic position of the mine Grot. The flotation tailings of the mine Grot, Serbia contain Cd, Pb, As ...
    ... determination of the graphitization degrees, which is equal to peaks intensity ratios of D– and G–bands (ID/IG). The ID/IG value is a measure of the crystallinity of the sample. The increase of its value corresponds to decrease of the crystallinity of the sample and vice versa [47,54]. From the literature ...
    ... analyzing of results. Minerals 2018, 8, 246 18 of 21 Acknowledgments: The financial support of this research work was provided by the Ministry of Education and Science of the Republic of Serbia, Projects III45005, III45012, 172015, TR34013. Conflicts of Interest: The authors declare no conflict of interest ...

  • 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

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... Abstract: In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses ...
    ... overview of the field of CL/NLP is given in section 2 of this paper. In order to complement a lack of OER in Serbia we have decided to develop the OER course “Lexical Recognition in the Natural Language Processing (NLP)”. This course is offered at the University of Belgrade, Faculty of Philology ...
    ... terms of the Lesser General Public License (LGPL). This means that everyone can redistribute Unitex freely within the terms of the LGPL license, access the source code of all Unitex modules and reuse it. 5. LEXICAL RECOGNITION IN NLP Course content The main topic of the presented course 12 ...