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Упит dcterms_subject_txt:Geochemistry and Petrology

2350 items

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... of geologic data, and provide a modern and effective in- formation basis for carrying out all activities related to planning, design and decision-making in the field of geology. Within the project a web portal3 was established that allows quick and easy access to geological data and information in the ...
    ... usually refers to names of persons, locations and organizations, and numeric expressions including, time, date, money and percentage. Recently other major types are being included, like “products” and “events”, but also marginal ones, like “e-mail addresses” and “book titles”. The NE hierarchy in our Named ...
    ... in our case nouns, adjectives, adverbs and acronyms — followed by their frequencies. Thus, the text is lemmatized and lemmas (simple and multi-word) are extracted and their frequency is calculated. In that way 12,204 simple lemmas (with 450,418 occurences) and 271 MWUs (with 6,525 occurences) were extracted ...

  • 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
    ... (firewood) for carbon monoxide and NOx from the buildings sector and oil derivates for carbon monoxide and NOx from the transport sector. Key words: energy related emissions, Serbia 1.INTRODUCTION Energy is essential to economic and social development of each community and improved quality of life of citizens ...
    ... 6%. Fossil fuels and biomass make more than 85% of the primary energy need to be transformed to heat and/or electricity through combustion processes 3, which are the main sources of atmospheric pollution 4. The need to control atmospheric emissions of greenhouse and other gases and substances leads to ...
    ... electricity and heat generation, as well as from the transport and buildings sectors 6. The transport sector is a major source of air pollutants, despite the many policy and technology advances achieved so far. It is responsible for around half of all energy related nitrogen oxide emissions and is an important ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... Science, University of Novi Sad, Serbia, 7Faculty of Science and Mathematics, University of Niš, Serbia, 8Faculty of Science and Mathematics, University of Kragujevac, Serbia and 9Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Germany (Received 5 November 2013 ...
    ... факултет, Универзитет у Нишу, Ниш, 8 Природно–математички факултет, Универзитет у Крагујевцу, Крагујевац и 9 Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Germany Ова студија је усмерена на свеобухватно испитивање стања загађености Дунава и Саве у пределу ...
    ... (PBDEs) and organochlorine pesticides (OCPs), such as dichlorodiphenyltrichloroethane (DDT) and analogues, hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), were measured in sediments and biota.18 Lipids, amino acids and carbohydrates are reported to be present in particulate and dissolved ...

  • An aproach to Implementation of blended learning in a university setting

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović (2011)
    ... edit and modify the course content and monitor student activities, and the student, who can access the course content, perform different activities proposed, and view his/her own results. Moodle is a flexible and modular tool, allowing various types of resources to be uploaded and activities ...
    ... activities based on different criteria, and monitor student activity and performance. As an e-learning support tool Moodle offers various forms of interaction and information sharing between teachers and students and among students themselves. Besides chats and forums as the most widespread forms ...
    ... for course enrolment, and the goal and outcome of the course. There is also a course content outline given by a description of theoretical and practical instruction, a list of course materials, the number of course hours for theoretical and practical instruction, and the method of instruction ...

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... remediation and prevention, fast emergency response, and other aspects of landslide risk management. 6 ACKNOWLDEGEMENTS This work was part of the Project “Detailed flood and landslide risk assessment for the urban areas of Tuzla and Doboj” funded by UNDP Office in Bosnia and Herzegovina and implemented ...
    ... etc., as well as the final risk model suggests good performance, both visually and numerically (high accurancy >75% and AUC of >0.85) and justifies landslide assessment in the future for many aspects of urban planning and related decision-making. mailto:milos.marjanovic@rgf.bg.ac.rs SCG-XIII ...
    ... tends to consume larger and larger portions of natural environment. In response, the interaction between urban and natural can be violent from both sides. For instance, the fragile balance of the natural slopes is undermined by slope cuts and de-vegetation for infrastructure and construction, which ...

  • 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
    ... determined from its decay products Th (63keV) and/or "Pa (1000 keV). The ecay products of ? Ra, _ Bi (609, 1120 and 1764keV) and "Pb (295 and 352 keV) were used for activity determination. The activity of 52 Th was calculated using its daughter product ŠAc (338 and 911 keV). K was determined from its single ...
    ... MPC(Th) MPC(K) Q) where Cgax Crh and Ck are the measured concentrations and MPC (Ra), MPC(Th) and MPC(K) are the maximum permissible con- centrations of “Ra, Th and K, respectively. Equivalent values for building materials used for interior, exterior and civil engineering construction as a ...
    ... PG2) and purified gypsum (PG1P). 69 Fig. 5. SEM images of (a) PG1, (b) PG2 and (c,d) PG1P. Scale bars: 100 um. Table 5. Ra., l„, H„ Hin and I, values calculated for phosphogypsum samples (PG1 and PG2) and purified gypsum (PG1P). PG1" PG1 PG2" PG2 PGIP (Bq kg ) (Bq kg ) (Bq kg ) (Bq kg ) (Bq ...

  • Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer

    Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)
    ... management and monitoring at all levels. 4.9.2 Study Area The aquifer system under study is located between the Danube and Tisa (Tisza) rivers and extends to the vicinity of lGskunfelegyhaza on the Hungarian side (north) and to Vrbas in Serbia (souih). The main groundwater consumers are the cities and industries ...
    ... paleogeographic conditions and improving the knowledge of geological structures [3-5]: ' Pre-Cambrium and Paleozooic metamorphic schists are the oidest rocks and represent a deep fundament for younger sedimentary rocks, mainly of Tertiary age. Mesozoic sediments mostly of Triassic and Cretaceous ages are ...
    ... field survey and measurements, the establishment of a GW monitoring network, the creation of a GW initial database, common workshops and seminars for local capacity building, and water-saving promotional activities. As one ofthe results of the project, an initial conceptual hydrogeological and hydrodynamical ...

  • Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content

    Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)
    Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...
    Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugs

  • Vebran Web Services for Corpus Query Expansion

    Ranka Stanković, Miloš Utvić (2020)
    U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.
    corpus search, web service, Serbian lexical resources, query expansion
    ... instanced with a part of the text or with any characters; 3) Use regular expressions and graphs of automata and transducers for searching and extraction; and 4) Build cascades of rules. Corpora SrpKor2013 (cf. 2.1) and RudKor (cf. 2.2) can be searched by OCWB, while a search of RudKor is also available through ...
    ... equivalent terms and definition in another language (presently only English equivalents of definitions are in the database). Externally developed Dictionary of library and information sciences10 encompasses the terminology of theory and practice of librarianship and in- formation sciences and a wide range ...
    ... digital libraries Romeka and Biblǐsa, since their query processors require such forms. Web search interfaces for OCWB and NoSketch Engine, CQPweb and Bonito respectively, have been adapted to accept and preprocess user query with an expanded syntax which is not supported by OCWB and NoSketch Engine corpus ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach

    Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)
    Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...
    pyrazoloquinolinones, nanocrystals, wet media milling, fasted/fed bioavailability
    ... K., V.D.D., D.V.R., and I.P.; investigation, J.R.M., D.E.K., J.B.Ð., A.K., V.D.D., D.V.R., and I.P.; writing—original draft preparation, J.R.M.; writing—review and editing, A.K., J.M.C., M.M.S., and S.D.S.; funding acquisition, J.M.C., M.M.S., and S.D.S. All authors have read and agreed to the published ...
    ... of milling solely, one-way ANOVA was conducted and revealed significant influence in formulations F1, F6, and F8, but after performing post hoc tests, the significant difference was noticed only when comparing 20% and 60% bead volumes (F6 and F8) or 20% and 40% (F1). Indeed, when analyzing PDI values, ...
    ... thermograms of samples S5, F5, F6, and F8 could be associated with residual water and PVP. Pharmaceutics 2021, 13, 1188 12 of 19 Figure 4. DSC thermograms of unprocessed DK-I-60-3, nanocrystal dispersions (F5, F6, and F8), and corresponding suspensions (S5, S6, and S8). To obtain a more detailed insight ...

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge

  • 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

  • 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

  • Multi-word Expressions for Abusive Speech Detection in Serbian

    Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev (2020)
    Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...
    uvredljiv govor, govor mržnje, leksički izvori, višejezični leksikon, izrazi sa više reči
    ... racial, national, and religious hate speech detection adopted by Gitari et al. (2015) was based solely on the usage of lexicon and rules. They used semantics and subjectivity features – polarity, intensity, and subjectivity level of words, using the domain corpus of hateful content and Subjectivity lexicon ...
    ... sentimental words and expressions, and SentiWordNet (Gitari et al., 2015), where it is assumed that abusive language consists of words indicating negative polarity of feelings, (3) list of offensive words and expressions (Bassignana et al., 2018) and (Hatebase.org), whether made by experts and/or obtained ...
    ... extensive use of online media and the Internet in gen- eral. The concept of abusive speech, as an umbrella term for phenomena such as offensive and hate speech, its content and forms of expression are analysed, trying to define its vocabulary, collocations, colloquial expressions, and context. Starting from ...

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen
    ... J., BACIU C., HUG S.J., BERG M. Geochemistry and arsenic behaviour in groundwater resources of the Pannonian Basin (Hungary and Romania). Appl. Geochem. 26, 1, 2010. 9. UJEVIĆ M., DUIĆ Ž., CASIOT C., SIPOS L., SANTO V., DADIĆ Ž., HALAMIĆ J. Occurrence and geochemistry of arsenic in the groundwater of ...
    ... this study, and consequently with higher estimated toxic and carcinogenic risk should be con- nected to the new treatment for water supply. The minimum As water gave HQ and R values of 0.29 and 0.13 per 1,000 persons, respectively, and the maximum As water resulted in HQ and R of 5.72 and 2.6 per 1,000 ...
    ... existence of toxic risk. Futhermore, in the study area the minimum As water gave HQ and R values of 0.29 and 0.13 per 1,000 persons, respectively, and the maximum As water resulted in HQ and R of 5.72 and 2.6 per 1,000 persons, and this should indicate the importance of developing a regional water sup- ply system ...

  • 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

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... calculate and optimise reduced paleostress tensors (Figs. A.1, A.2 and Table A.1 of the Supplementary Appendix) by following a standard inversion approach with confidence criterion (e.g., Angelier, 1994; Angelier and Goguel, 1979; Angelier and Mechler, 1977; Delvaux and Sperner, 2003 and references ...
    ... (Lesić et al. (2019). These rotations and translations were associated with Eocene–early Miocene orogen-parallel extension and ~ 100 km of dextral strike-slip offset along the curved Cerna–Jiu and Timok faults system in the South and Serbian Carpathians, and a gradual transtensive opening of basins ...
    ... Global and Planetary Change 195 (2020) 103361 4 Fig. 2. Tectonic map of the Serbian Carpathians and adjacent areas of the South Carpathians and Balkanides showing the regional fault kinematics (compiled and modified after Basic geological map of former Yugoslavia, scale 1:100.000 and Maţenco, ...

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija