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Упит dcterms_subject_txt:Water Science and Technology,Aquatic Science,Geography

2391 items

  • 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
    ... project [2:38-38]. In the zones with water protection of the foundation soil and the surrounding terrain, protective sealing measures are applied both in and outside of the transition layer for the purpose of controlled drainage of polluted water (or other liquids), and according to the pollution protection ...
    ... to protect the soil from frost. The necessary conditi smaller than 0.02 mm, which prevents capillary rise of water and the formation of ice lenses, which causes uplift during formation, and when melting, the track settles. The protective layer cannot be located in the area of groundwater impact. The ...
    ... results in the need to repair and reduce the speed. It is an indisputable fact that this test method is used as faster one in the world, but it is carried out with other tests: determination of Dpr, water content, correlation relations Ev2/Ev1, correlation between Ev2 and Evd, determination of degree ...

  • Novel cerium and praseodymium doped phosphate tungsten bronzes: Synthesis, characterization, the behavior in the Briggs-Rauscher reaction and photoluminescence properties

    Tijana Maksimović, Pavle Tančić, Jelena Maksimović, Dimitrije Mara, Marija Ilić, Rik Van Deun, Ljubinka Joksović, Maja Pagnacco (2023)
    Due to the interesting and potentially useful properties, phosphate tungsten bronzes are constantly being studied and attract a lot of attention. In the present work, two different metallic elements, belonging to the group of rare-earth metals, cerium and praseodymium, were used as a dopants for phosphate tungsten bronzes. Novel cerium and praseodymium doped phosphate tungsten bronzes were successfully synthesized and further characterized by thermal analyses, Fourier-transform infrared spectroscopy, X-ray powder diffraction, scanning electron microscopy with energy-dispersive X-ray spectrometer and ...
    Electrical and Electronic Engineering, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Spectroscopy

  • Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One

    Nemanja Stanic, Dragoslav Rakic, Josip Isek, Slavoljub Simic (2024)
    In order to solve serious traffic congestion in Belgrade, a number of studies regarding the Belgrade Metro construction have been carried out since 1973. However, only in 2019, the routes of the future metro lines 1 and 2 were de-fined as a part of the General Metro Construction Project. The lines are de-signed to intersect at the location of Sava Square, where an interchange met-ro station will be built. It represents a complex geotechnical structure consist-ing of three different ...
    metro station, geotechnical modelling, displacements

  • Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis

    Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović (2019)
    ... fractions of lignite extracts and pyrolysis prođucts are садајепе and retene. The matunty ratios based оп trimethyinaphthalenes (ТММЕ) and tetramethyinaphthalenes (TeMNr) slightly increase from Pyr400 to Pyr500. The same 15 тејајед to methylfluorene (МЕ) гано (2-+3-MF)/(1-+4-MF) and methyiphenanthrene (МР) ...
    ... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs MATURATION AND ISOTOPIC СНАМСбЕ5 ОЕ INDIVIDUAL HYDROCARBONS IN LIGNITE LITHOTYPES THROUGH DIAGENESIS AND EARLY CATAGENESIS ...
    ... 400 "С and 500 %C. Aliphatic апд aromatic fractions isolated from lignite extracts and hquid pyrolysis prođucts were analyzed by gas chromatography-mass spectrometry. Carbon isotope determinations (65С) of indiviđual compounds in these fractions were also performed. Compositions ог апрћанс and aromatic ...

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

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... the public water supply of Valjevo, Mionica and surrounding settlements. Karst groundwater under artesian pressure and elevated temperatures (17–37 "C) are taped with wells drilled below the Miocene cover in the surrounding. settlements of Paštrić, Sanković and Petnica. 3. MATERIALS AND METHODS ...
    ... significant degree of karstification and that they are more water-bearing than compared to the Lower Triassic. However, to consider the geothermal potential, the Triassic sediments are interpreted as a unique carbonate reservoir, with an estimated area of 200 km? and an average thickness of 300 m. Recharge ...
    ... structural pattern, including the basin margins, where Mesozoic and Paleozoic sediments outcrop on the surface. 7,410,000 7,412,000 7,414,000 „420, a w 7,424,000 7,426,000 7,428,000 7,430,000 » A NZ ELB drillhole 4, 91 0, 00 0 Water temperature *C 11 - 20 e 21-30 e 31-40 4, 90 8, 00 0 ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... will be searched for and the values that they stand for. Determiners and values can be set one by one, or this step can be skipped. In case this step is skipped, the software will automatically load the default determiners and their values (Table 1). All default determiners and their values listed in ...
    ... are replaced with hahaha and haha respectively. If this option is not checked, this step will be skipped and only determin- ers in its default form, which is listed on the advanced mining tab, will be found and processed. The mere extraction involves loading selected terms and their values from advanced ...
    ... will not be executed, and if the value of an expression is not between −1 and 1 the program will report an error and stop the execution. After each of the determiners is replaced with a node whose attribute is its value (Figure 6), XML document becomes well-formed again and is ready for further processing ...

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • On the compatibility of lexical resources for NooJ

    Ranka Stanković, Miloš Utvić, Duško Vitas, Cvetana Krstev, Ivan Obradović (2012)
    Lexical resources for many languages are provided for the NooJ linguistic development environment. Meta-data descriptions of morphosyntactic and semantic properties of these languages and their resources are a mandatory part of each language module. In this paper we analyze how well the meta-data actually describe resources for a chosen subset of languages and to what extent are they compatible across languages to support multilingual processing. We show that there is place for improvement in both directions.
    ... values: singular, plural, dual, count, and collective. For English, Polish, Croatian and Hungarian, only singular and plural are applicable, while Serbian and Bulgarian also use count. In Serbian this number corresponds to paucal (a small number – 2, 3 and 4). However, the collective category ...
    ... category is not totally inapplicable, and is thus coded with the tags +Coll and +HumColl in Serbian and +ConcColl and +CollHum in Polish (see Table 2). According to the same table the Bulgarian NooJ resources do not recognize values other than singular and plural. Finally all observed languages, except ...
    ... compatibility and standardization. The paper ends with concluding remarks. Comparison of annotation systems Morphological, syntactic and semantic information in NooJ resources is represented by codes or tags, pertaining to morpho-syntactic and semantic categories, their properties and the features ...

  • Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević (2017)
    ... Neogene of Central and South-Eastern Europe 57 58 7th International Workshop | Neogene of Central and South-Eastern Europe data are obtained from the previously known stratigraphic units (Pannonian and Pontian, sensu Stevanović). Based on litho- and biostratigraphic analysis and measurement of ...
    ... current state and perspectives, GIN RAS, 356–359. STUDENCKA, B. & JASINOWSKI, M. (2011): Bivalves from the Middle Miocene reefs of Poland and Ukraine: a new approach to Badenian/Sarmatian boundary in the Paratethys. Acta Geologica Polonica, 61, 79–114. MIO-PLIOCENE GEODYNAMICS AND ITS STRATIGRAPHIC ...
    ... Belgrade, Faculty of Mining and Geology, Department of Regional geology, Kamenička 6, 11000 Belgrade, Serbia *corresponding author: ljupko.rundic@rgf.bg.ac.rs In recent years, thanks to numerous infrastructural works and construction of the local roads, new outcrops and sections near Avala Mt. have ...

  • Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma

    Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković (2013)
    ... 17 Pellegriti et al,27 and Ito et al28 found a similar prevalence of multifocal tumor foci and lymph node metastases (12.1% and 13.4%, 31.8% and 30.1%, and 42.8% and 47.9%, respec- tively). Ito et al reported more than 40% of patients who presented with lymph node metastases and multiple tumor foci.2 ...
    ... was 97.7% T 1.3% after 5 and 10 years; the probability of disease-specific survival was 95.9% T 2.2% after 15, 20, 25, and 28 years after the initial treatment and was significantly influenced by recurrence, clinical stage, and patients’ age (P = 0.0001, P = 0.0005, and P = 0.02, respectively). Sex ...
    ... their risk of relapse and cancer-specific mortality is higher than in low-risk patients.23,24 The aim of this study was to retrospectively evaluate influence of surgery and RAI therapy as an initial treatment, on the recurrence and survival of patients with DTM. PATIENTS AND METHODS Patients A r ...

  • Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia)

    Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić (2019)
    ... n (С15-Сг0) and increase of long-chain (Cz6-Ca3) homologues. The obtained results suggest lowering of the water table during the formation of the Main coal seam. This change resulted in lesser inundation and deposition of MM associated with smaller input of bacterial and algal OM and higher contribution ...
    ... parts of the Main coal seam and coal layers within and under lower oil shale package. Since vitrinite reflectance (%Rr, 0.44 + 0.03 - 0.46 + 0.02) and biomarker compositions indicate the same maturity stage of organic matter (OM), corresponding to late diagenesis and early catagenesis, petrographic ...
    ... proxies and stable carbon isotope ratios (6'3) of individual biomarkers were used to evaluate the origin and depositional environment of OM. The content of vitrinite group macerals increases from top to bottom of the Main coal seam which is associated with a notable decrease of liptinite and mineral ...

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... of clarity and coherence as a way in which they wish to teach the subject of English language and geology. Six thematic units: 1. Landslides 2. Metamorphic rocks 3. Mineral deposits 4. Hydrological cycle and groundwater 5. Surface water and glaciers 6. Geophysics, seismology and prospecting ...
    ... unexpect- edly; antonyms: expectedly, unsurprisingly channe!l noun a passage along which surface water and groundwater flows detrital load nounload that is formed of rocks, minerals, and sediments divide nouh a narrow tract of high ground that separates two drainage basins or surface wa- ...
    ... Geology through Myths............. . Diamond, the Supreme Gemstone. .........caa Table of contents • Unit5 • SURFACE WATERS AND GLACIERS Partl SUREFACE WATER....... ttt ttt 122 Vocabulary....n.MOORe. ... o - W ... .. NEO 125 Reading Comprehension.......... iii 126 Part,2 RBGLAGIERSL. ...

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... DISCUSSION 4.1. The criteria for identification of hyperpycnites and their genetic model The sustained hyperpycnal flows which enter the basin last rela- tively long if the sediment-laden river discharge is sufficient to maintain the water density difference, usually for several days (MULDER & SYVITSKI ...
    ... activity of the unit led to and accounts for the unfavourable conditions for fos- silization. Overall occurrence and distribution of plant fragments and trace fossils was used as a criterion for sedimentologic and stratigraphic interpretation of the studied section and comparison with similar formations ...
    ... Carnic Alps and the South Karavanke, Lower Carboniferous of the Dinarides, Sredna Gora in Bulgaria) could be better compared based on flo- ral elements and their similar sedimentological characteristics. ACKNOWLEDGEMENT I thank Tom van LOON and Alfred UCHMAN for offering im- portant and helpful comments ...

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... deposits are common and wide­ spread in the territory of western and southwestern Serbia. Meso­ zoic radiolaria are found in pelagic and hemipelagic sediments deposited on the Neo-Tethys ocean floor, intercalated between Triassic shallow-water carbonate ramp and platform sediments, and are widespread ...
    ... Ljubis Fm. contains Late Triassic lagoonal and back-reefal Dachstein Limestone and some condensed Early and Middle Jurassic components from the overlying of the Dachstein Limestone in the lower part, and in the upper part additional Late Jurassic shallow-water compo­ nents; the Gonje Fm. contains various ...
    ... various clasts, e.g. Late Jurassic shallow-water clasts; open-marine Late Triassic limestone clasts, various heavy minerals and others (GAWLICK et al., 2017). The Ljubiš Formation was dated at the type-locality only by the pres­ ence of the radiolarian specimen Eucyrtidiellum sp. cf. E. un- umaense ...

  • 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)
    ... explosive amount, and conditions of blasting and geologic characteristics of the soil; all of this being determined on the basis of test blasting for the specific work environment. In the Sadovskii equation two parameters, K and n appear and they are conditioned both by rock mass characteristics and blasting ...
    ... blast site to the monitoring point (m); r0—radius of the explosive charge; and n—exponent, conditioned by soil properties and mining conditions and determined by field measurements as well. The radius of the explosive charge r0 and the amount of explosive Q are related by the equation: Q “ 4 3 ¨ π ¨ r3 ...
    ... reduced distances for models 1, 2 and 3. The survey of reduced distances R, recorded oscillation velocities vr, calculated oscillation velocities vi1, vi2, and vi3, as well as the difference between the recorded and calculated soil oscillation velocities for models 1, 2, and 3, are presented in Table 2. ...

  • Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage

    Maja Milošević, Biljana Đorđević, Alena Zdravković (2021)
    ... a mixture. As some of the slabs have rolled and rough edges they may be regarded as illite and/or halloysite. Morphology varies from short tubular, spheroidal and elongated tubules, which are the most common. EDS data confirmed hydroxides of illite and iron. Illite minerals deposited from formation ...
    ... Management and Events Ltd., Sofia Printing House: Bulged, Sofia 1505 Editors: Ruslan I. Kostov, Radostina Atanassova ISBN 978-954-92875-6-1 © Earth and Man National Museum, 2021 © Bulgarian Mineralogical Society, 2021 9th International Conference Mineralogy and Museums ...
    ... clay body based on mineralogy and applying the obtained knowledge in the preservation of this type of intangible cultural heritage, inscribed in the National register of ICH and as geoheritage in Serbia as well. The analysis of the phase, mineral composition and structure of the clay body was ...

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • From post-disaster landslides inventory to open landslides data

    Biljana Abolmasov, Miloš Marjanović, Uroš Đurić, Jelka Krušić (2021)

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... could indicate tWO mineralizing pulses or mixing and dilution of the primary mineralizing fluid by seawater or meteoric water. In order to clarify the genetic relationships between the fluid inclusion assemblages, we will perform microthermometry and Ramananalysis, which will provide indisputable evidence ...
    ... conditions. In addition, the S2 and Q2 inclusions follow the growth zonesofthe crystals, indicating the simultaneouscrystal growth and fluid nclusion entrapement. Conversely, thc itregular, needle-like, and ameboid inclusions ofQ1 and S1 occur in linear, subparallel structures and have a higher proportion ...
    ... whereas the gangueis primarily quartz, sericite and adularia. The predominantminera! style is stockwork breccia with open-space veins and abundantdruse-lined cavities fill terminated crystals of gangue and ore minerals. Ore disseminations are minor and. restricted to pyrite. Ore minerals have not been ...

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија
    ... t, delta and  shore  plains  are  predominantly made  of  sandstones with  siltstone  and  clay  intercalations  and  local  occurrences of coal. Kikinda Formation sediments are deposited in shallow‐water environments and are  recognized by progradation and aggradation series (Figure 1a and 1b). Kik ...
    ... of the shape and characteristics of curves of gamma ray  (GR) and specific resistivity  (RT)  logs.   Funnel  shape of  the GR  log points  to  the  reduction  in  the basin water  level and  the  increase  in  the  level of  depositional energy, which leads to the reduction in the content of shale and incr ...
    ... classified  into  several  formations:  Hetin, Majdan, Mokrin,  Kikinda and Paludina(Ivanišević  Radivojević, 2018).    Hetin  Formation  ‐  open  lake marls  are  generally  represented  by  deep‐water  lake  sediments,  hemipelagic and carbonate marls.  In  the exploration area,  it  is represented by ...