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Упит dcterms_subject_txt:the house of algebraic integer

2856 items

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • 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
    ... displace- ment of the aforementioned sediments along the Rakovica fault is more than 100 m. In addition, this movement was determined based on comparison of the absolute altitude of the layers of the Upper Pannonian marls on the surface and the marls of the same age in borehole KGK-14 (the difference ...
    ... conglomerates of the Bučvar member (The Slanci Fm.) are up to 7 m thick and represent the continental-lacustrine cycle of the early Miocene (DOLIĆ, 1997, Figure 12. The contact between the blueish-gray serpentinites in the basal part of the section (1) and the Pleistocene delluvial-prolluvial clastites ...
    ... research has generally confirmed the view of the afore- mentioned authors, but new insights have emerged on the nature and characteristics of the Beli Potok trough. Namely, on the left bank of the Rakovica Stream near the Avala road, the transitional section between the slightly dipping Sarmatian laminated ...

  • The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments

    Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)
    The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...
    sediments, Tisza River, organic matter, biomarkers, oil pollutants
    ... firmed that the recent sediments of the Tisza River, from Kanjiža Town to the confluence into the Danube River, contain the same type of oil pollutants. Based on the compositions of terpanes and steranes and the values of the biomarker parameters in Tisza sediments, it is supposed that the oil pollution ...
    ... (bitumen) in the surface sediments of the Tisa River, from the most upstream analyzed point near Kanjiža Town down to its confluence into the Danube River are given in Table II. The results indicate that in the relatively long part of the river flow (153 km), the contents of the total organic carbon ...
    ... (hopanes) in the saturated fractions of the sediments (ion chromatograms m/z = 191) for the most upstream sample, a sample from the middle part of the analyzed river flow and a sample from the part that is close to the confluence into the Danube river are shown in Fig. 3. The values of specific o ...

  • Automatic construction of a morphological dictionary of multi-word units

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić (2010)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion
    ... share the same class nc n4x, although the first MWU consists of a noun followed by a prepositional phrase and the second of a noun followed by a phrase in the genitive. However, from the inflectional point of view they both behave in the same way: only the first component inflects, whereas the second ...
    ... production of a strategy in the form of XML documents. The schema of these documents is presented in Figure 1. Our strategy consists of two XML documents, one for MWU nouns, and the other for MWU adjectives. Each XML document consists of a sequence of rules that are grouped by the number of components ...
    ... 20 24 The rules are applied in the sequence in which they appear in the XML document, which means that if more than one rule can apply for a particular MWU, then more MWU candidate lemmas will be offered in the order of the application of rules. Hence, the order of rules in the strategy is of importance ...

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... particular position between the two divergent belts of the Alpine orogen, unravelling of thermal and deformation history of the SMM becomes essential for correct recon- struction of the evolution of tectonic units in south-eastern Europe. The central parts of the SMM (south-eastern Ser- bia) ...
    ... bi-afold axis of Fa = byi-afold axis of F+ + bi- afold axis of F, Southern part of the Lmin Lower Caomplex N=6 Fig.4 Lower hemisphere equal-area plots of structural elements from a western part of the Lower Complex, b central part of the Lower Complex, c southern part of the Lower Complex ...
    ... a consequence of the initial orientation of b,, or exclusively a result of varying intensity of the later deformational overprint(s). Based on the similarities in structural style, the deforma- tion stage D, corresponds to the “phase I” from the detailed structural study of the Vlasina Unit ...

  • 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
    ... 2016; Walawalkar et al., 2016). The commercial use of phosphogypsum in the areas of agricul- ture, road construction, the cement industry and the manufactur- ing processes of other building materials is limited by the presence of the significant quantities of natural radionuclides, such as U, ...
    ... a driving mechanism for the recrystallization process. The mass balance of the recrystallization experiment for the PGI sample is as follows: the yield of purified gypsum (PG1P) was 90.50%, with 4.29% of insoluble residue (PGIR) and 5.21% of the original mass in the supernatant. Sample PGIP was ...
    ... concentrate in the supernatant. Although the solubility of brushite is a twelfth of that of gypsum, the recrystallization did not affect significantly the phosphorus content. This may be indicative of: (1) other P-bearing phases being present; (2) replacement of SOŽ with HPO?T within the crystal structure ...

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... tools that support the development process. The class model of the OpmGIS geodatabase has been developed in the MS Visio tool. The logical model of the geodatabase was transformed to the physical model for the ArcGIS development environment, which is being used at the Faculty of Mining and Geology ...
    ... by direct import in ArcMap. Figure 6 depicts the development environment of the OpmGIS base with the content of several thematic layers shown on the left side of the panel, and an overlapped visual representation on the right. The background of the map is set to a spatially referenced orthophoto ...
    ... started with the creation of the PovrsinskiKop package, within the Workspace package, followed by the creation of class diagrams. A class is the basic unit of the system model, where class examples are objects with the same structure, behavior, relations and semantics. For example, the class Busotina ...

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... basically to the appearance of the environment. In the course of development of e-learning courses on Moodle during the past three years additional modules have been added on an "as needed" basis, such as the module for mathematical formulas. By the end of the academic year 2011/12 the number of courses ...
    ... feature the CATEGORIES element which defines to which category from a predefined set of categories the dictionary belongs. In the case of export from RudOnto the user can select from several options: no category, the category of a dictionary is the root of the sub-tree, or the category the concept ...
    ... model of RudOnto structure Figure 3 features panels from the information system module dedicated to management of RudOnto; the left hand side of the larger panel shows the hypernym/hyponym hierarchy of concepts, while the right hand side offers the full entry for the selected concept in the hierarchy ...

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... determination of the parameter m is based on the quotient of the product of equal number of experimental data of the rock mass oscillation velocity V , using the oscillation velocity equation. In this way, first, wc determine the parameter m , and then, when the parameter n found, we determine the parameter ...
    ... – Determining the parameters by applying the least square method. The Least Square Method is mainly used to obtain the parameters K and n which represents a common model. Model 2 — Determining the parameters through the application of quotient of products of the same number of reduced distances ...
    ... to evaluate the degree of connection between the reduced distances R and oscillation velocities V we used index of the curved dependency o [7]. In order to make sure that the conclusions we reach based on the sample concerning the characteristics of the basic data set are credible, the sample needs ...

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...
    Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analiza

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija

  • Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts.

    Dejan Prelević, Ana Mladenović, Violeta Gajić, Milena Dunčić, Blažo Boev (2024)
    Tethys closure, Scaglia Rossa, intracontinental basalts
    ... took place at the end of the Cretaceous along the Sava-Vardar zone. Located within the main suture zone, the Klepa Mountains provide a unique opportunity to study the nature and timing of the final closure of the Neotethys Ocean. The Klepa Mountains, situated in the central part of North Macedonia ...
    ... a Fifth Congress of Geologists of the Republic of North Macedonia GEOLOGY OF THE SOUTHERN PART OF THE SAVA – VARDAR ZONE: NEW CONTRAINTS FROM THE KLEPA MTS. lDejan Prelević, 'Ana Mladenović, !Violeta Gajić, Milena Dunčić, *Blažo Boev TUniversity of Belgrade – Faculty of Mining and Geology, ...
    ... Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts. Dejan Prelević, Ana Mladenović, Violeta Gajić, Milena Dunčić, Blažo Boev Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Geology of the southern part of the Sava-Vardar ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... structure of mine, shift and working day in which the injury occurred, the source and cause of the injury, etc. Figure 3 depicts two OLAP cubes. Each cell of the cubes holds a number of injuries. In the first cube (a) injuries are categorized according to the type of injury and the quarter of the year ...
    ... happened. For the second cube (b), the measures taken into consideration are the type of injury, the day in the week on which it happened and the age of the injured worker. Based on the first cube we can conclude that the number of injuries in the year 2010 was considerably higher than in the previous ...
    ... Figure 2. The main panel with data about the injury The system also records the worker’s experience at the time of injury, namely: employment and total years of service, previous injuries and the average number of work hours. The time when the injury at work occurred is defined by the date, the working ...

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... solve the problem at hand successfully. The main goal of the system is the evaluation of the general ventilation state of the mine. This global goal can be subdivided into a hierarchical structure of subgoals where each of these subgoals can be viewed as the estimation of a set of parameters ...
    ... use in solving the problem at hand. Section 2 of this paper outlines the problem- solving strategy through a hierarchical decomposition of the main goal of the VENTEX system, the evaluation of the mine ventilation state, and the formalization of this strategy by means of a modified obje ...
    ... evaluating the mine ventilation state. Figure 5. The Diagonals Class Slot facets are defined by means of the slot editor. In /Fig. 6/ the Diagonals:Delta slot is shown. It represents an attribute of the Diagonals class, namely the ratio of the number of diagonals to the total number of branches ...

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

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

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... presented. The main equations are discussed by Pastor et al. (2009) considering: A. balance of mass of the mixture—propagating along the slope and increasing due to bed entrainment—combined to the balance of linear momentum of pore water, B. the balance of linear momentum of the mixture, ...
    ... phase can be neglected, the stress tensor in the mixture can be decomposed into a ‘pore pressure’ and an effective stress, and the mechanical behavior of the mixture can be described by a system of differential equations governing the dynamics of each of the phases as well as the coupling among them ...
    ... landslide aWAREness” (BEWARE) funded by the People of Japan and the UNDP Office in Serbia (grant No 00094641). All activities are also a part of the Project TR36009 funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia. 7 REFERENCES Chen, C. and ...