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Упит dcterms_subject_txt:geological range

334 items

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... from simple to complex. As an example, we present simple formulas for score mapping to the range 0–100 for quantitative variables, such as degraded surfaces area, waterway distance and population in the range of 500 m: Surface_Score = (P ´ min) ˆ 100/(max ´ min), where P is the degraded abandoned area ...
    ... the most important: type of protected area, land use, distance from watercourse, and distance from protected areas. Among geological factors analyzed and evaluated were geological structure and vulnerability of groundwater. The source for assessing the vulnerability of groundwater was the map of groundwater ...
    ... periods and there is a possibility that there could be an archaeological interest. Therefore, this database can be of multiple importance, from a wide range of different scientific disciplines, i.e., archaeology. In Serbia there is currently no comprehensive spatial database of archaeological sites; so ...

  • The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje

    Boban Pavlović, Milica Pešić-Georgiadis (2019)
    In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...
    Obnovljivi izvori energije, potencijal solarne energije, GIS, mapiranje solarnog potencijala
    ... issues. As described on the website, Copernicus Land Monitoring Service (CLMS) provides geographical information on the land cover to a broad range of users in the 12% International Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece field of environmental terrestrial ...
    ... conditions - 0.3. — Transmittivity - The fraction of radiation that passes through the atmosphere · (averaged | over - all wavelengths). Values range from 0 (no transmission) to l (all transmission). The default is 0.5 for a generally clear sky. 6. Results and Discussion Previously shown ...
    ... efficiency (%); H = Annual average solar radiation on tilted panels (shadings not included); PR = Performance ratio, coefficient for losses (range between 0.5 and 0.9). The factors for this equation Wwere determined in consultation with experts at the National Renewable Energy Laboratory ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... Serbian) Karamata S (2006) The geological development of the Balkan Peninsula related to the approach, collision and compression of the Gondwanan and Eurasian units. In: Robertson AHEF, Mountrakis D (eds) Tectonic Development of the Eastern Mediterranean Region. Geological Society, London, Special ...
    ... labour costs, in countries such as China, India, Brazil, or South Korea, are out-competing the local stone industries of other countries with a wide range of exotic and cheap decorative stone (Terezopoulos 2004; Snethlage 2011). This fact is perhaps the main cause of the stone production decrease ...
    ... but some heterogeneity in terms of physical properties. Because of the low amount of void space, the bulk density varies slightly and is in range of 2,650–2,690 kg/ m* (Fig. 4a). The values of real density (2,700–2,712 kg/ m?) are in accordance with the mineral composition of these almost ...

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... USS/t CO>, with a most likely value of 2.8 USS/t CO» stored. Estimated costs for offshore storage over the same depth range cover reuse of existing oil and gas platforms [61]. The range is 4.7–12.0 USS/t CO- stored, showing that offshore costs are higher than onshore costs. Figure 4.4 shows CO- stored ...
    ... there still exists limited understanding of the reaction mechanisms involved in the chemical transformations of CO». 4. CARBON GEOLOGICAL STORAGE OPTIONS Geological storage of CO» refers to the permanent and safe injection and placement of CO» in underground formations. Potential storage formations ...
    ... existing applications are being developed further for design and operation of geological storage. Figures 4.1 and 4.2 indicate the various kinds of trappings over time that seal CO» in their stored form in the geological formation. sohublity trappirg tr ap pi ng co nt ri bu ti on (0 to ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... patterns and make decisions based on data without being explicitly programmed for each scenario. Artificial intelligence encompasses a broader range of technologies that allow computers to perform tasks typically requiring human intelligence, such as speech recognition, visual perception, and ...
    ... chemical corrosion, and mechanical impacts. Selecting the right sensor for a particular application depends on the requirements, such as measurement range, accuracy, and resistance to external influences. 5.2. Flow sensor Flow sensors are essential devices in many industrial, commercial, and research ...
    ... e variations, chemical corrosion, and mechanical impacts. The choice of the right sensor depends on the application requirements, including flow range, accuracy, and resistance to external influences. 5.3 Temperature sensor Temperature sensors play a crucial role in detecting issues with submersible ...

  • The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)

    Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov (2019)
    Geography, Planning and Development,Aquatic Science,Biochemistry,Water Science and Technology
    ... The physical and chemical parameters of the groundwater in the tunnel varied: EC range 243–10,200 µS/cm, ORP −277 to 458 mV, and pH 7–9.1 (alkaline water). Water temperatures were from 8.35 to 17 ◦C. The higher range (>12 ◦C, from 5 + 940 to 7 + 600 m) was measured in the deeper part of the rock mass ...
    ... Figure 1. Geographic position of the study area and schematic representation of the longitudinal section of the tunnel, including elevations. In geological terms, the tunnel was built through the contact of two regionally important tectonic units (Getic and Danubian), which are represented by a system ...
    ... are limestones, marls and sandstones. The Mesozoic complex is transgressively overlain by Pliocene sand, and marly clays. (Figure 2). The complex geological structure of the terrain has led to the development of a complex hydrogeologic system, where there is a hypogenic karst aquifer in addition to the ...

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... Availability is a measure of the state of the system in terms of its efficiency to start operation and to obtain outputs in the required range. The required range is set as the function of the criteria, for a given time and in given surrounding conditions. Availability is determined depending on the ...

  • Flotability of chalcopyrite from the Rudnik deposit

    Đurica Nikšić, Predrag Lazić, Milena Kostović (2021)
    Директно селективно флотирање олова, бакра и цинка у флотацији рудника „Рудник” датира од 1984. године. Технолошка шема омогућава директно издвајање селективних концентрата у три циклуса. У првом циклусу се издваја минерал олова (галенит), док су минерал бакра (халкопирит) и минерал цинка (марматит) депримирани. У другом циклусу се оток концентрације минерала олова кондиционира и припрема за издвајање минерала бакра. Након кондиционирања, у овом циклусу се издваја минерал бакра. У трећем циклусу се оток концентрације минерала бакра кондиционира и припрема за ...
    Директно селективно флотирање, халкопирит, KAX, NaCN

  • Application of ERT in the study of debris-flow source area: Case study Selanac debris flow

    Dragana Đurić, Jelka Krušić, Biljana Abolmasov (2021)

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... Macedonia were considered. After analysis of all the available thematic geological, engineering geological, geotechnical maps and cross-sections, and geotechnical reports, lithological units were grouped into six engineering-geological groups with simi- lar physical-mechanical behavior. The rating values ...
    ... T. (1979): Basic Geological Map of Socialist Fed- eral Republic of Yugoslavia 1:100000, sheet Kicevo. Prepared in period 1963-1972 by Geological Survey – Skopje. Printed by the Military geographical institute of Yugoslavia. PETKOVSKI, P. & POPOVSKI, S. (1982): Basic geological map of Socialist Federal ...
    ... available at: www.dr.rgf.bg.ac.rs 2019 | 72/1 | 81–92 | 5 Figs. | 4 Tabs. | www.geologia-croatica.hr Journal of the Croatian Geological Survey and the Croatian Geological Society 1. INTRODUCTION Plenty of landslide susceptibility models have been developed by using GIS technology within the past ...

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... (EP), the analysed dozers belonged to the group of strong dozers in the range of the 190–300 kW class, and according to the nominal towing force (TF) to the group of heavy dozers 250–350 kN. In order to evaluate the priority, the range of the class for both sub-criteria was divided into 10 equal parts, and ...
    ... parameters (technical, economic, exploitation, survey), grouped according to the dozer type. On the ordinate, the priority vectors are presented (scale range 0–0.40). The red line shows the end collective results. 5. Conclusions The choice of the optimal dozer type and manufacturer is a challenge influenced ...
    ... parameters (technical, economic, exploitation, survey), grouped according to the dozer type. On the ordinate, the priority vectors are presented (scale range 0–0.40). The red line shows the end collective results. 5. Conclusions The choice of the optimal dozer type and manufacturer is a challenge influenced ...

  • 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
    ... candidates for nano- sizing, especially if amorphization is not possible [1]. Nanosizing or nanonization implies particle size reduction to the sub-micron range, thus obtaining nanocrystal dispersions [6]. High drug loading, relatively simple composition, and easy production make nanocrys- tal dispersions an ...
    ... geometry. The used detector was D/teX Ultra 250 strip detector in 1D standard mode with CuKα1,2 radiation source (U = 40 kV and I = 30 mA). The 2θ range in which the results were collected was from 3◦ to 40◦, with the step of 0.01◦ (data collection speed was 3 ◦/min). To minimize the low background ...
    ... in the case of 1:4 ratio, where the difference in particle size was only 10 nm. It is well known that with reducing particle size to the nanometer range, the surface-to-volume ratio increases dramatically, Pharmaceutics 2021, 13, 1188 10 of 19 so obtained nanoparticles are prone to aggregation to ...

  • 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
    ... the nebulising gas at a pressure of 25 psi, drying gas (N2) temperature and flow were 350 °C and 10 L min-1, respectively. The ion trap scanning range was set from 50 to 800 u. Estradiol (α- and β-), estriol, estrone, diethylstilbestrol and ethinyl estradiol were detected in the negative ESI-mode ...
    ... were analyzed by HPLC-DAD (UV–Vis) con- sisting of a Hewlett Packard 1100 Series chromatograph coupled with a DAD detector ope- rating in the UV–Vis range. The separation was achieved using a C8 column (250 mm×4.6 mm) with Chromasil 100 (5 μm) as the stationary phase. The column thermostat was main- tained ...
    ... time for thiamethoxam was 5.7 min, for imidacloprid 8.5 min and for clothianidin 7.4 min. For quantification purposes, calibration curves in the range from 0.1 to 100 mg L-1 were prepared. The LOD value for all the analysed neonicotinoids was 0.5 mg L-1 mg. _____________________________________ ...

  • Evaluation And Perspectives Of Underground Coal Mines In Serbia

    Vladimir Milisavljević, Milena Lekić, Ivica Ristović, Vojin Čokorilo, Aleksandar Cvjetić (2017)
    ... years. Evaluation of these mines included analysis of performance and development potential of eight mines. Evaluation took into account a wide range of factors, considered to be most appropriate in relation to whether output and productivity could be increased and whether there are enough resources ...
    ... this purpose following criteria are selected: • Reserves, score is given in relation to existing A and B amounts of reserves (criteria C1); • Geological conditions, such as faulting, seam inclination, block size, seam variation, roof and floor conditions, rock pressure and geo-mechanic conditions ...

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... mineral's grade. The various processes through which ores are formed – magmatic / igneous, hydrothermal, sedimentary, metamorphic – resultin a range of ores which can serve different purposes: energy (fossil fuels, uranium), construction and industry (aggregates, clays for brick / tile, carbonates ...
    ... (rammarispo{(-. .J . :yar-Ja%93 270 y Myaı . D . - a ı- eyala y a -yskt ipixercisesL, d. ...... a d W · -kef Ag • ,,, 5v -P ON 2 . a SOMa. Geological Wonders.......... t Profession – Young Geotechnician................. Geology Mystery Files ... ı Geology through Myths........... . • Unit2 ...
    ... 0a -M Reading Comprehension...........i a \rarmmar Spof.. . e a av dMe de e a e de a a la Ioarcik89 olo c o b djo o BRIIO OB .y JD - IIIA K Geological Wonders..........i. a Profession – Young Crystallographer................... Geology Mystery Files ... e Geology through Myths............. ...

  • Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta

    Aleksandar Pačevski (2022)
    ... of abstracts of the XVIII Serbian Geological Congress GFOLOGIJA REŠAVA PROBLEME GEOLOGY SOLVES THE PROBLEMS Divčibare, 01-04. jun 2022. XVIII Kongres geologa Srbije: Zbornik apstrakata (Nacionalni kongres sa međunarodnim učešćem) XVIII Serbian Geological Congress: Book of abstracts (National ...
    ... Serbian Geological Society Suorganizator / Co-organised by Univerzitet u Beogradu – Rudarsko-geološki fakultet / University of Belgrade, Faculty of Mining and Geology Za izdavača / For the Publisher Vladimir Simić Predsednik Srpskog geološkog društva / President of the Serbian Geological Society ...
    ... ore-forming processes and genesis of ore deposits in general. The study of ore textures is first done by macroscopic examination on a field, in the range from a meter to millimeter scale. For more complete interpretation of the ore textures, very important microscopic examinations are necessary, Which ...

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... between experts from the Czech Republic (Geological Institute of the Academy of Science of the Czech Republic, VŠB-Technical University of Ostrava, Charles Uni- versity in Prague and the Czech Geological Survey) and the Republic of Serbia (Geological Survey of Serbia, and Faculty of Mining and ...
    ... Valanginian. The most recent data on the stratigraphic range of ammonite species come primarily from sites with multidisciplinary studies as part of the international J/K boundary project. However, even at these sites, data on their exact range are not yet clear. Order Ammonitida Haeckel, 1866 ...
    ... an Range, Hungary). Institute of Geosciences, University of Szeget, GeoLitera Publishing House, Szeget, pp. 293—342. Szives, O., F6zy, l., 2022. Towards the ammonite zonation of the Jurassic/Cretaceous transition: new data from ammonitico rosso/biancone sections of the Trans- danubian Range (Hungary) ...

  • CEEPUS network CIII-RS-0038: More than two decades of supporting current educational and scientific trends in geosciences

    Kristina Šarić, Ana Fociro, Michael Wagreich, Hugo Ortner, Christoph von Hagke, Hans-Jürgen Gawlick, Eva Gerlšová, Elvir Babajić, Darko Tibljaš, Sibila Borojević Šoštarić, Miklos Kazmer, Jolanta Burda, Ela Machaniec, Adriana Trojanowska Olichwer, Ágnes Gál, Paul Tibuleac, Luka Gale, Ondej Nemec, Igor Duriška, Volker Höck, Corina Ionescu (2023)
    studentska i nastavnička mobilnost, Alpsko-karpatsko-balkansko-dinaridski geološki prostor, fundamentalna i primenjena geologija