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Упит dcterms_subject_txt:ratio of modified secondary and primary compression index

2944 items

  • Development of terminological resources for expert knowledge: a case study in mining

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić (2015)

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... it is analyzed a typical stove in Serbian households, and in the case of pellet-based, a modern wood pellet-based furnace is analyzed. The objective of the LCA study is to assess the environmental performance of heating systems using GWP index, expressed through CO2-eq emissions. According to the ...
    ... Office of the Republic of Serbia [5], solid fuels (wood and coal) are used in 56.6% of households for heating in Serbia. The usage of wood biomass for heating in Serbia is characterized by excessive use of firewood for heating without adequate replanting, minimal use of wood residues, and low wood ...
    ... Ivezić, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia, dejan.ivezic@rgf.bg.ac.rs 3 Associate Professor, Ph.D., Marija Živković, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia, marija.zivkovic@rgf.bg.ac.rs Life Cycle Assessment of Individual wood ...

  • A WordNet Ontology in Improving Searches of Digital Dialect Dictionary

    Miljana Mladenović, Ranka Stanković, Cvetana Krstev (2017)
    In this paper, we present a method for automatic generation of a digital resource, which connects all indirect synonyms of a dialect term to all indirect synonyms of a corresponding term in the standard language, aiming to improve the search of a digital dialect dictionary. The method uses SWRL rules defined in the Serbian WordNet ontology to identify sets of synonymous words. It also uses e-dictionaries to produce correct lemmas in standard language that users usually employ in searches. ...
    ... sharing, visu- alization and analysis of digital dialect dictionaries. This includes: the develop- ment of digital dictionaries of dialects [4], [13], [1], the development of tools for the management of dialectal dictionaries [10], the software for data visualization and presenting of linguistic dialectal ...
    ... terms and examples of the use of words or phrases as they are spoken in the dialect; graphic information about the geographical location using concepts of Google Maps; the etymological origin of the words, morphological information like part of speech, and additional semantic data. The content of the ...
    ... existence of the indirectSynonymy relation and, after inferencing, 6,430 indirectSynonymy related pairs of verbs. 4 The implementation of new search features The proposed method for connecting the standard language with the dialect dictionary relies on a table of sets of synonymous words of the standard ...

  • Komparacija metoda XRF i ICP-MS na uzorcima uglja i produkata sagorevanja

    Branko Kostić, Dejan Prelević, Sabina Kovač, Ksenija Eraković, Dragana Životić (2022)
    Ugljevi niskog ranga – ligniti u Republici Srbiji predstavljaju glavnu energetsku sirovinu koja se koristi za proizvodnju električne energije. Rudarstvo u Srbiji doprinosi bruto dodatoj vrednosti sa 1,8% (2020; https://publikacije.stat.gov.rs/). Sagorevanjem ugljeva niskog ranga u termoelektranama generišu se velike količine elektrofilterskog pepela i pepela, koje često predstavljaju jedan od izvora zagađenja životne sredine usled sadržaja toksičnih elemenata. Dalja upotreba produkata sagorevanja zavisi od njihovog sastava i sadržaja toksičnih mikroelemenata. Svakodnevno sagorevanje lignita u termoelektranama uslovljava konstantan monitoring potencijalno toksičnih ...
    ugalj, produkti sagorevanja, XRF, ICP-MS

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... developed within a project funded by the European Executive Agency Education, Audiovisual and Culture (EACEA) in Brussels. Its primary target are universities and enterprises of the Western Balkans (WB), and accordingly educational materials will be published in WB languages, which belong to "small" ...
    ... potential of wordnets stems from the interlingual index (ILI), which establishes relations between synsets representing the same concept in different languages (Krstev et al., 2004). Finally, among lexical resources within LSS are terminological resources such as GeolISS term and RudOnto (Stanković ...
    ... improvement and enhancement of relations between the academia and the enterprises and integration of creative research potential with industry and academic institutions. The second objective within our project is to develop and implement guidelines and procedures for quality assurance of OER in WB ...

  • Geotehnički uslovi izgradnje tunela „Debelo brdo“ na autoputu E-80 Niš - Pločnik

    Dragoslav Rakić, Radojica Lapčević, Irena Basarić Ikodinović, Dragan Lukić (2022)
    Tunel „Debelo brdo“ nazvan je po najizraženijem relјefnom obliku na ovoj drugoj deonici autoputa E-80 Niš – Pločnik. Osnovnu geološku građu na lokaciji tunela čini Mio-Plioceni kompleks heterogenog litološkog sastava. Izgradnja tunela je predviđena delom u otvorenom iskopu dužine 240 m, a delom sa podzemnim iskopom dužine 190 m. U zoni tunela, padina je okarakterisana kao uslovno stabilna, pa bi neadekvatna zasecanja mogla da izazovu klizanja terena. Iz tih razloga, u okviru rada posebno su prikazani geotehnički uslovi izgradnje ...
    Tunel „Debelo brdo“, Geotehnički parametri, Privremene kosine, Šipovi, Podgrada.
    ... sliding of the terrain. For these reasons, the paper presents separately the geotechnical conditions for the construction of the tunnel in open excavation (temporary excavation securing by installing piles is provided), and the geotechnical conditions for tunnel excavation with a partially modified model ...
    ... CONSTRUCTION OF ON THE HIGHWAY E- - 1, 2 Ikodinovi 3, 4 1 University of Belgrade Faculty of Mining and Geology, Djusin 7, Belgrade, dragoslav.rakic@rgf.bg.ac.rs 2 University of Belgrade Faculty of Mining and Geology, Djusin 7, Belgrade, radojica.lapcevic@rgf.bg.ac.rs 3 University of Belgrade ...
    ... Merdare, Zbornik radova - CD (Book of papers - Srpski kongres o putevima, Beograd, str. 12-23. [6] ; ; J (2019). Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia Proceedings of the XVII European Conference of Soil Mechanics and Geotechnical Engineering ECSMGE-2019 ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... & Odelius H. 1998: Secondary ion mass spectrometry analysis of rare earth elements in grandite garnet and other skarn related silicates. European Journal of Mineralogy 10, 251–259. https://doi.org/10.1127/ejm/10/2/0251 Pamić J. & Šparica M. 1983: The age of the volcanic of Požeška Gora (Croatia ...
    ... stage and andradite-rich phase growth, which has been initiated by boiling process, the fluid composition was extremely controlled by the oxidation state, W/R ratio and salinity of solution; • Garnets from Rudnik skarns widely range in composition whereas the garnets near the end-member of andradite ...
    ... et al. Fig. 1. a — Simplified geological map of Rudnik area modified according to the Basic geological Map 1:100,000, Sheets Kragujevac (Brković et al. 1980) and Gornji Milanovac (Filipović et al. 1978); b — Exact position of investigated area within Serbia. 19ANISOTROPIC GROSSULAR–ANDRADITE GARNETS ...

  • 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
    ... (2006) The geological development of the Balkan Pen- insula related to the approach, collision and compression of Gondwanan and Eurasian units. Geol Soc Spl Publ 260:155— 178. doi:10.1144/GSL.SP.2006.260.01.07 Karamata S, Krstić B (1996) Terranes of Serbia and neighbouring, areas. In: Knežev ...
    ... External foredeep B Tisza mega-unit BII suture of Ceahlžu-Severin Ocean Fig.1 Tectonic map of the Balkan Peninsula (modified after Schmid et al. 2008; van Hinsbergen and Schmid 2012). B/ue polygon outlines the area of the map in Fig. 2, and the red polygon in Fig. 3 Int J Earth Sci (Geol ...
    ... classifica- tion: end-member boudin types and modified boudin structures. J Struct Geol 26:739—763. doi:10.1016/j.jsg.2003.08.015 Graf J (2001) Alpine tectonics in Western Bulgaria: Cretaceous com- pression of the Kraishte region and Cenozoic exhumation of the crystalline Osogovo—-Lisets Complex ...

  • 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
    ... mineral composition of the source and reservoir rocks. Therefore, crude oils can significantly differ in values of source parameters, such as distribution of C27– –C29 14α(H)17α(H)20(R) regular steranes17, gammacerane and oleanane indi- ces,18–20 ratio of C26 to C25 tricyclic terpanes1 and C2917α(H)21β(H) ...
    ... identification of isomers with the biogenic 17β(H)21β(H) configuration in all samples (Fig. 3). The values of terpane maturity ratio (Table V) are in the range typical for crude oils.1 Based on distributions of terpanes in the saturated fractions of the sediments and the values of the corresponding ...
    ... dichloro- methane (4:1 volume ratio) and the NSO fractions (polar fraction, which contains nitrogen, sulphur, and oxygen compounds) with mixture of dichloromethane and methanol (1:1 volume ratio). The saturated hydrocarbons were analyzed by gas chromatography–mass spectrometry (GC–MS). A gas chromatograph ...

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... weight of water is known (y„ = 9.81 kN/m* ) as well as unit weight of solid particles (ys). The most common parameters are: dry unit weight (ya) expressed by weight-volume ratio - W„/V; porosity (n) expressed by volume ratio - V,/V and moisture content (w) expressed by weight ratio - W„/W ...
    ... inside with contacts between them dry and other way around. Therefore, only porosity between particles was analysed in this paper. For the determination of void ratio, artificially prepared samples for testing of shear strength and compressibility of municipal waste (44 samples in total) were ...
    ... 'captured” gas), porosity (m) can be analysed as secondary porosity (porosity within particles) and porosity between partcles. However, in this way 109 definition of phase composition as well as determination of mechanical properties of municipal waste is further complicated, because in ...

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... railway tracks and main tracks on regional railways Ev2 > 100 MN/m2, Ev2/Ev1 2.2, Evd > 45 MN/m2, Rc* for the construction and improvement of tracks on local railways and secondary tracks on all railways Ev2 > 80 MN/m2, Ev2/ > 40 MN/m2, Rc* where the ratio Ev2/ Ev1 less than the minimum value prescribed ...
    ... railways and secondary tracks on all railways Ev2 > 45 MN/m2 m2, Rc* where the ratio Ev2/ Ev1 less than the minimum value prescribed for Ev2. When creating a transition layer, the following is used: capillary rise resistant material; unbound aggregate, grain size 0/125 mm; percentage of aggregate ...
    ... dynamic deformation modulus Evd, and without determining the degree of compaction Dpr and determining the correlation coefficient between Ev2 and Evd as well as the ratio Ev2/Ev1. Also, when testing with a light drop weight, the required moisture is not checked, and testing of layers is not performed in ...

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... As an example, we used the model of fuzzy sets and fuzzy logic to determine the risk level of failure of a mobile crushing machine, the “Lokotrack LT 1213S”, which is manufactured by “METSO MINERALS”. The crushing machine is used for the secondary crushing of stone aggregate at the quarry “Ladne ...
    ... in human and financial resources that could reduce the number of failures or mitigate the negative effects of a failure. Such investment may be useful: the maintenance system can be modified, achieving considerable savings. In spite the fact that proposed model minimizes the influence of subjectivity ...
    ... “min–max” composition. The proposed model can be used for risk assessments of failures in any machine used in industry and mining. Here, we tested it on the secondary mobile crushing machine “METSO MINERALS”, type “Lokotrack LT 1213S”, which is used in the open pit “Ladne vode”, near Petrovac na Mlavi ...

  • Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia

    Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)
    The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...
    tecišta, zadržavanje nanosa, RAMMS, validacija

  • 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)
    ... models 1, 2 and 3, based on experimental data, we have obtained equations, which make possible to determine the oscillation velocities of the rock mass v depending on the reduced distance R. To assess the degree of connection between v and R, we have used the curved line dependency index ρ [14,15]. ...
    ... detonation of explosive materials is followed by release of a large amount of energy. Whereby, a greater part of energy is used for rock destruction, and part of energy, in the form of seismic wave, is lost in the rock mass causing rock mass oscillation. Investigations of the character and behavior of the pattern ...
    ... 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 velocity v ...

  • Preparation of Multimedia Document “YU Rock Scene”

    Milena Obradović, Aleksandra Arsenijević, Mihailo Škorić (2017)
    SUMMARY: This study will present the preparation process of a multimedia document entitled YU ROCK SCENE in which participants were senior students of undergraduate studies of the Department of Library and Information Science at the University of Belgrade Faculty of Philology during the academic year 2014/2015, as a part of the subject Multimedia Documents. This study gives an overview of the historical development of rock and roll in the territory of the former Yugoslavia, rock scene in Yugoslav republics, ...
    multimedia document, library science, information science, rock and roll, music, Yugoslavia
    ... mainly from encyclopedias, newspa- per and periodicals libraries and primary and secondary monographic sources. Rest 120 Infotheca Vol. 16, No. 1–2, August 2016 Professional paper of the material – photos, audio tracks and videos were found either in cultural and media institutions (libraries, archives ...
    ... Macedonia and Montenegro (Aleksandar Pavlović). Rest of the groups researched influence of rock and roll on art, media and social events: gigs and discotheques (Katarina Jugov, Ivana Merdović and Jelena Radić), festivals (Milan Avdulah and Uroš Tošić), books and poetry (Marija Brašanac and Tamara ...
    ... com University of Belgrade, Faculty of Philology 1 Historical Development of Rock and Roll in the Territory of Former Yugoslavia Rock and roll in the territory of former Yugoslavia is rooted in the 1920s when new instruments, such as saxophone and guitar, began to emerge (Fajfić and Nenad, 2009, pp ...

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... determined. Index is the simplest form, basically just a list of terms, usually arranged in alphabetical order. Glossaries, which are on the next level of the spectrum, are lists of terms with definitions, and they can be monolingual, bilingual or multilingual. In the case of a bilingual or ...
    ... those concepts and simple reasoning about a certain domain RudOnto Strong semantic description Weak semantic description Thesaurus A taxonomy expanded to include additional semantic relationships Index a list of terms specific to a certain field Glossary an index containing d ...
    ... process, and it is included in the blended learning approach at the Faculty of Mining and Geology through an export of its subsets to the Moodle e-learning environment. This paper gives an outline of RudOnto, details about Moodle implementation on the Faculty of Mining and Geology, and describes ...

  • 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)
    ... velocities of the rock mass v depending on the reduced distance R. In order to assess the degree of connection between v and R, we have used the curved line dependency index ρ [9]. The evaluation of the relationship degree of two variables [5] to values of the curved line dependency index ρ is given ...
    ... Equation of Rock Mass Oscillation—First Mode The equation of Sadovskii has been derived from the condition that if the radius of charge and the distance from the blast site to the monitoring point increase in the same, or approximately the same ratio, the soil oscillation velocity remains the same [3], i.e ...
    ... 10 of 15 Based on the data in Table 2, a statistical analysis was carried out and the following values were obtained: ‚ For model 1: The curved line dependency index ρ1 between the reduced distance R and soil oscillation velocity v is: ρ1 = 0.9880 (there is a strong correlation between R and v, given ...

  • Минерагенија зеолитских туфова Србије

    Vladan Kašić (2018-02-05)
    Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...
    минерагенија, зеолитски туф, Србија, клиноптилолит, хојландит
    ... Li Z., Bowman R.S., (1998): Sorption of Perchloroethylene by Surfactant-Modified Zeolite as Controlled by Surfactant Loading.Enviromental Science and Technology, 32, 2278-2282. Li Z., Anghel I., Bowman R.S., (1998): Sorption of oxyanions by surfactant-modified zeolite, J. Dispersion Sci. Technol ...
    ... natural zeolite modified with cetylpyridinium chloride.Colloids and Surfaces B: Biointerfaces 83 (1), 165-172. Krajišnik D., Daković A., Malenović A., Djekić L., Kragović M., Dobričić V., Milić J., (2013): An investigation of diclofenac sodium release from cetylpyridinium chloride-modified natural zeolite ...
    ... Conf. “Wastewaters, municipal solid vastest and hazardous wastes, Kopaonik, 131-135. Vujaković A., Tomašević-Čanović M., Daković A., Dondur V., (2000): The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant- modified clinoptilolite, Appl. Clay Sci. 17, 265–277 ...

  • Numerical modelling of a single intra-oceanic subduction for the origin of the Balkan ophiolites

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • 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)
    ... also used in order to evaluate the degree of connection between values of obtained parameters n and K for models 1 — 5. Besides, in order 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 ...
    ... The equation of Sadovskii was derived from the condition: if the radius of charge , and distance from the blasting site to the monitoring point r increase in the same or approximately the same ratio, the rock mass oscillation velocity V remains the same [6]. Here we cite second way of rock mass ...
    ... statistical analysis has been done and following values have been obtained. The curved line dependency index QO between the reduced distance R and rock mass oscillation velocity Y : 202 • muodell: ,= 0.9843 for total of 12 data (there is a strong correlation between R and y , given in the Equation (11)) ...