Претрага

Упит dcterms_subject_txt:hydrogeological characteristics

413 items

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    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 ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... Knowledge of mineralogical-petrographic characteristics of rock material is essential when testing mechanical properties. The results of previous research show that the val- ues compressive strength of rock material is significantly influenced by microstructural characteristics, the most important of which are: ...
    ... Correlation of mineralogical and textural characteristics with engineering properties of selected granitic rocks from Turkey. Eng. Geol. 1999, 51, 303–317. [CrossRef] 13. Yılmaz, N.G.; Goktan, R.M.; Kibici, Y. Relations between some quantitative petrographic characteristics and mechanical strength properties ...
    ... that the mechanical properties of the rock Minerals 2021, 11, 813 4 of 19 material are affected mainly by the mineralogical and petrographic characteristics of quartz and biotite. Figure 2. Analyzed open pit slope consisting of dacite with microscopic images of the material: (a) altered dacite and ...

  • Knowledge and Rule-Based Diacritic Restoration in Serbian

    Cvetana Krstev, Ranka Stanković, Duško Vitas (2018)
    In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).
    diacritic restoration, morphological dictionary, corpus, word n-grams, local grammars
    ... terminology related to social, national and religious conflicts, extremism and terrorism, information security. The Table 1 contains quantitative characteristics of the above-mentioned resources. Table 1: RuThes-like Thesauri Thesaurus Number of Number of Number of concepts Text Entries Conceptual Relations ...
    ... was semi-automatically generated from the published version of RuThes (RuThes-lite 2.0) (Loukachevitch et al., 2018). Table 2: Quantitative characteristics of synsets and entries in RuWordNet Part of Speech Number of Number of Number of Synsets Unique Entries Senses Nouns 29,296 68,695 77,153 Verbs ...
    ... synsets were linked to each other with the relation of part-of-speech synonymy (cross-categorial synonymy). The Table 2 contains quantitative characteristics of the RuWordNet synsets, senses, and unique entries. The hyponym-hypernym relations were established between synsets of the same part of speech ...

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... frame/slot paradigm, which can be successfully used for its implementation (Rich, 1983). In the same way the characteristics of an object are represented by its attributes, frame characteristics are represented by its slots. Namely, slot values describe attributes of the object represented by the frame ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... frame/slot paradigm, which can be successfully used for its implementation (Rich, 1983). In the same way the characteristics of an object are represented by its attributes, frame characteristics are represented by its slots. Namely, slot values describe attributes of the object represented by the frame ...

  • Results of comprehensive monitoring activities on Umka landslide, Belgrade, Serbia

    Biljana Abolmasov, Uroš Đurić (2021)
    klizišta, monitoring
    ... weathered Neogene marls in Serbia. Landslides 12 (4): 689-702. Ćorić S., Božinović D., Vujanić V., Jotić M. and Jelisavac B., 1996, Geotechnical characteristics of old landslides in Belgrade area. In: Senneset K (ed) Proceedings of the 7th International Symposium on Landslides, 17–21 June 1996, Trondheim ...

  • Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... -1- has slightly higher water absorption than the the rest of the samples. Differences in terms of manufacture processes and their characteristics are evident and should be emphasized for better understanding and awareness of the cultural heritage that is traditional hand clay pottery ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... different levels of application in environmental, geotechnical as well as civil engineering [1,2]. Through the MICP process, bacteria can modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing ...
    ... different levels of application in environmental, geotechnical as well as civil engineering [1,2]. Through the MICP process, bacteria can modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing ...
    ... Primo Star Binocular Microscope, Jena, Germany). Based on standard score results, bacterial isolates with the best performance based on tested characteristics will be chosen for the next experimental steps. 2.2. The Second Step: Bacterial Strain Identification Primary identification by VITEK® 2 Compact ...

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... economic projection. The main characteristics that define Serbia as a case study are that electricity production is predominantly based on coal (lignite) by a joint- stock electric utility power company wholly owned by the government. These characteristics have implications and practical relevance ...
    ... in the final section. 2. Materials and methods Understanding the dynamics of key economic indicators at the na- tional level and the key characteristics of the electricity sector is crucial for assessing the impacts of the ETS on the expenditure side of GDP in a specific economy. A comprehensive ...
    ... Utilities Policy 91 (2024) 101855 • The impact of ali the elements above on projections of real GDP until 2030. Taking into account the characteristics of the case study, available historical data, projections from relevant institutions for the economy and energy sectors, and the period for ...

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... manipulative plateau, part of the waste disposal boxes, the waste selection hall, the whole recycling yard) are directly dependent on the characteristics of waste in this part of the landfill. It is well known, however, that waste is a very poor quality primarily due to: heterogeneous composition ...
    ... materials and by their size), insufficient compaction and consolidation. Due to this specific porous structure, the physical and mechanical characteristics of the waste are extremely variable at a relatively small distance. Therefore, any engineering intervention on the deposited material is a special ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... corresponding graphical technical documentation. Therefore, this program system should regularly define and keep updated the basic technical characteristics of all maintenance subjects. Considering technical complexity of this program system, it is located in the places where maintenance is being ...
    ... information has to be entered for every part mentioned above. Figure 2 shows a hierarchical tree with equipment components, and respective part characteristics on the right side of the form. The technical database, connected with technical documentation and drawings (assembly drawings, production drawings ...

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • 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

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... obstruent consonants, with approximants and nasals being sonorants. Admittedly, this scale puts many consonants with different phonological characteristics into one category (e.g. stops and fricatives); however, according to Zec (1995, p.86), it „is not nearly as elaborate as some of the scales proposed ...
    ... repeated. In our text we have 𝑅𝑅 = 0.0098 for syllables (2417 types) and 𝑅𝑅 = 0.0059 for words (21378 types). The repeat rate is one of the characteristics of an empirical distribution; its values are reflected also in the parameter values. An analogy in the behaviour of syllables and words can ...
    ... be repeated. In our text we have RR = 0.0098 for syllables (2417 types) and RR = 0.0059 for words (21378 types). The repeat rate is one of the characteristics of an empirical distribution; its values are reflected also in the parameter values. An analogy in the behaviour of syllables and words can be ...

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... Theng & G. Lagaly, editors). Amsterdam, The Netherlands, Elsevier Ltd. Boussen S., Sghaier D., Chaabani F., Jamoussi B. & Bennour A. (2016) Characteristics and industrial application of the Lower Cretaceous clay deposits (Bouhedma Formation), southeast Tunisia: potential use for the manufacturing ...
    ... Minerals, 40, 383–426. Kramar S., Lux J., Mladenović A., Pristacz H., Mirtič B., Sagadin M. & Rogan-Šmuc N. (2012) Mineralogical and geochemical characteristics of Roman pottery from an archaeological site near Mošnje (Slovenia). Applied Clay Science, 57, 39-48. LCPC (1987) Limites d'Atterberg, limite ...
    ... origins of ceramic technology at Dolni Vestonice, Czechoslovakia. Science, 246, 1002—1008. Vieira C.M.F., Sanchez R. & Monteiro S.N. (2008) Characteristics of clays and properties of building ceramics in the state of Rio de Janeiro, Brazil. Construction and Building Materials, 22, 781–787. Winkler ...

  • Петролошке карактеристике тријаских карбоната у околини Толића (Мионица)

    Михаило Вујашевић (2024)
    У тријаским теренима у околини Толића код Мионице извршено је узорковање карбонатних стена које су предмет овог рада. На одабраним узорцима утврђене су петролошке карактеристике. Главни задатак овог завршног рада представља испитивање минералошких и петрографских карактеристика карбонатних стена, применом оптичке анализе, рендгенске дифракције и калциметрије. Макроскопском детерминацијом и применом Данхамове класификације испитивани узорци су сврстани у кречњаке калкаренитског до калклутитског склопа, односно mudstone, packestone и grainstone типа. Микроскопским прегледом кречњака и применом Фолкове класификације утврђен је њихов састав и ...
    тријаски карбонати, петрографске карактеристике, класификације кречњака
    ... which are the subject of this study, was carred out. The petrographic characteristics. were determined on the selected samples. The main task of this final thesis is to examine the mineralogical and petrographic characteristics of carbonate rocks, using optical analysis, X-ray diffraction, and ...
    ... determined, and they were identified as fossiliferous micrites, micrites, and microsparites. Key words: Triassic carbonates, petrographic characteristics, limestone classification CAJIP;KAJ IBA :4:1071 RRRAAAAAA RAAAAAA 1 PAJ.0) III i 2a |0 AAAAAA AAAAAA AAAAAA AAAAAA AAAAAA AAAAAA AAAAAA ...

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

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

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... ligands is: thiourea[ guanosine-50-mono- phosphate[ L-histidine[DMSO. This order is associated with the electronic, structural, and chemical characteristics of complex and nucleophiles. The substitution reaction with thiourea was studied at three different temperatures (288, 298, and 310 K). Negative ...
    ... of their interactions with biomolecules could help a lot toward better understanding of some cell processes. On the basis of the chemical characteristics of such complexes and biologically relevant molecules, some interactions could be predicted. One of themost important facts is knowledge of their ...
    ... of reactivity for selected ligands is: Tu[ 50- GMP[ L-His[DMSO. This is in a good agreement with their electronic, structural, and chemical characteristics. The associative mode of substitution is confirmed for the substitution reaction with Tu. The mono- functional complex [Ru(trpy)(bpy)Cl]? with ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... law of alteration in the oscillation velocity of the soil depending on distance, explosive amount, and conditions of blasting and geologic characteristics of the soil, being determined on the basis of test blasting for the specific work environ- ment. The Sadovsky equation is determined based on ...
    ... in the equation (4) which should be determined for the specific work environment and by par- ticular blasting conditions. With regard to the characteristics of the rock mass oscilla- tion law, it is possible to determine the pa- rameters K and n in a number of ways, i.e. models, thereby using the values ...
    ... functional cor- relation is accepted as a good one. 4 REVIEW OF MASSIVE BLASTING AT THE “KOVILOVAČA“ OPEN PIT - DESPOTOVAC 4.1 General characteristics of the “Kovilovača" open pit The “Kovilovača“ limestone deposits have an exceptionally simple geological structure. Limestones of this area ...

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... the tailings. The characteristics of the analyzed flotation tailing waste deposits are shown in Table 1. ● đ đ Figure 1. Schematic review of the study area. —Tailing ponds: 1—Žarkov Potok; 2—Gornje Polje; 3—Žitkovac; 4—Bostanište; 5—Tvrd̄anski Do. Table 1. The characteristics of the analyzed flotation ...
    ... Zbornik radova “Zaštita životne sredine u industrijskim područjima”, Kosovska Mitrovica, Srbija, 19–20 April 2007; pp. 8–25. 12. Nikić, Z. Hydrogeological Analysis of the Low Flows Formation and Regionalization; Zadužbina Andrejević: Belgrade, Serbia, 2003; pp. 1–154. 13. Milentijević, G. Podzemne ...
    ... of metallic mineral ores are by-products of MMCC “Trepča” mining activities. Keeping in mind the topic of this paper—the physical and chemical characteristics of deposed material and the fact that tailings have not been remediated—the basic intention was to choose and apply a method with a high level ...

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... 17, 81–85. [CrossRef] Dollimore, D.; Pearce, J. Changes in the surface characteristics of residues from the thermal decomposition of nickel oxysalts. J. Therm. Anal. 1974, 6, 321–333. [CrossRef] Sun, Z.-L. Characteristics of thermal decomposition products of rare earth, alkali earth metal and ...
    ... negative influence [43-45]. Many different methods were developed for the synthesis of nanocrystalline nickel- and zinc ferrites with tailored characteristics [46e-51]. The thermal decomposition of coordination compounds with simple organic ligands emerged as a method of choice due to the low reaction ...
    ... Synthesis and characterization of NiFe>»Ou ferrite: Sol-gel and hydrothermal synthesis routes effect on magnetic, structural and dielectric characteristics. Mater. Chem. Phys. 2021, 258, 123888. [CrossRet] Majid, E.; Rauf, J.; Ata, S.; Bibi, I.; Yameen, M.; Iqbal, M. Hydrothermal Synthesis of Zinc ...