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Упит dcterms_subject_txt:Atomic and Molecular Physics and Optics

2419 items

  • 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
    ... height H (x, y,t) and flow velocity U (x, y,t) and is given by: 𝑄(𝑥, 𝑦, 𝑡) ˙ = 𝜕𝑡𝐻 + 𝜕𝑥 (𝐻 𝑈𝑥 ) + 𝜕𝑦 (𝐻 𝑈𝑦 ) (1) Where Q(x, y,t) describes the mass production source term, and Ux and Uy represent the depth- averaged velocities in horizontal directions x and y (Christen et ...
    ... volume, and Vero-eroded volume This small values are real regarding to very huge initial volume and depths in main block (Selanac 30 m maximum, Leva reka 17m maximum) and could be concluded that is connected with large occasions and deep source areas. J. Krušić, B. Abolmasov and M. Marjanović ...
    ... analysis of pre vent and post event DEM, and ERT investigation. Comparison of two epochs DEM helped in better defining source area and precise eroded zone. Estimated deposition volumes, heights and erosion depths are given in Tab 2. Table 2 Comparison of estimated and calculated results ...

  • The Use of the Omeka Semantic Platform for the Development of the University of Belgrade, Faculty of Mining and Geology Digital Repository

    Petar Popović, Mihailo Škorić, Biljana Rujević (2021)
    Under the regulations of the Ministry of Education, Science and technological Development, a digital repository based on the Omeka S data storage platform has been developed for the Faculty of Mining and Geology. The platform has been upgraded with the required modular extensions, Solr index and automatic OCR. Furthermore, document indexing and search have been fine-tuned with the aid of e-dictionaries of the Serbian language, which has brought about outstanding results in terms of usage facilitation and overall ...
    Дигитални репозиторијум, Омека, претрега дигиталних библиотека

  • 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
    ... advantages and disadvantages of using the system, and emphasizes the importance of IPCC system implementation in open pit mines. 2. DESCRIPTION AND CLASSIFICATION OF IPCC SYSTEMS In the technological sense, an IPC system performs feeding, crushing, conveying and discharging system [5, 6] and it can ...
    ... Reclamation, and Environment, In-pit crushing and conveying technology in open-pit mining operations: a literature review and research agenda. 2020. 34(6): p. 430-457. 6. Darling, P.J.M. and Exploration, SME mining engineering handbook: Society for Mining. 2011: p. 941–956. 7. Oberrauner, A. and D. Turnbull ...
    ... loading and hauling have always been a significant part of capital and operating costs with a share of 65-70% of the total. In this sense, the optimization of the loading and hauling system can have a significant impact on the mining economy [2]. In most surface mines, a combination of Trucks and Shovels ...

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    rekultivacija, ugalj, održivi razvoj, višekriterijumsko odlučivanje, VIKOR

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... pits of Stari Kostolac and Ćirikovac, after that in the surface mines of Klenovnik and Cirikovac, picture 2) and are not being excavated now; 177 2. Now in the excavation phase are some parts of 1, II and III layers (I and II layers in Kovin by underwater exploitation; II and III layers in the Drmno ...
    ... seams and perform a comparative analysis of coal af}ectation on the environment. P/ith 155 analyzes of HM from coal, 45 from ash, 165 from gravel and 30 from soil, we perform analysis of horizontal and vertical distribution of HM and comparative analysis. B/hat interests us as authors and you as ...
    ... the Velika Morava and Mlava rivers, which flow into the Danube in that area (figure 1 and 2). Itis divided into two parts by the Danube - to the south is the Kostolac Basin, and to the north ofthe Danube is the Kovin Basin (Figure 2). Geological explorations began in 1941 and continues to this day ...

  • 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
    ... was implemented as follows: training on 50 and testing on 25, training on 100 and testing on 25, training on 100 and testing on 50, training on 200 and testing on 25, training on 200 and testing on 50, and finally, training on 200 and testing on 100 m resolution datasets. The results clearly show that ...
    ... Sandstones, shales and limestones (9) K2 2,3 Flysch and flysch-like sandstones and shales (10) K1 5 - Sandstones and shales (11) 3K1 - Sandstones, limestones and green-grayish sandstones (12) 3K1 - Reef limestones (13) J,K - Flysh: sandstones, marls and shales (14) andesites and latites (15) Serpentinite ...
    ... – Marly clays and clays (3) M3 2 - Gravels, sands, marls and clays (4) M3 1 – Limestones and clays (5) M2 2 - Limestones, clays and sands (6) M2 2/ M3 1 -Limestones, sands, clays and sandy clays (7) M1 2 - “Slanačka serija”; marls, shales, clays, sandstones with trace of coals and tuffites (8) K2 ...

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    reclamation, coal, sustainable development, multi-criteria decision making, VIKOR method

  • Two approaches to compilation of bilingual multi-word terminology lists from lexical resources

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2020)
    In this paper, we present two approaches and the implemented system for bilingual terminology extraction that rely on an aligned bilingual domain corpus, a terminology extractor for a target language, and a tool for chunk alignment. The two approaches differ in the way terminology for the source language is obtained: the first relies on an existing domain terminology lexicon, while the second one uses a term extraction tool. For both approaches, four experiments were performed with two parameters being ...
    Linguistics and Language,Software,Artificial Intelligence,Language and Linguistics
    ... Regression (LR) (Hosmer, Lemeshow and Sturdivant 2013), Linear and Radial Basis Function Support Vector Machines (SVM and RBF SVM) (Joachims 1998), Random Forests (RF) (Liaw and Wiener 2002) and Gradient Boosting (GB) (Friedman 2001). These binary classifiers were trained and evaluated in 5-fold Cross Validation ...
    ... Skadina, Tadić and Gornostay 2012; Hamon and Grabar 2016; Oliver 2017; Arcan, Turchi, Tonelli and Buitelaar 2017). For the extraction of terminology on the target side, we apply morphological and statistical analysis. A similar approach was taken by other authors (Bouamor, Sem- mar and Zweigenbaum 2012; ...
    ... 2012; Lahbib, Bounhas and Elayeb 2014; Fawi and Delmonte 2015; Hamon and Grabar 2016; Naguib Sabtan 2016; Semmar 2018). To the best of our knowledge, a research where terminology extraction was per- formed, and later compared, using both an existing list of terms and a list of extracted terms, has not ...

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting
    ... number of actors and their interests and complex social processes. In order to perform required changes, it is necessary to develop long-time strategies and pathways. Plans, strategies or scenarios related to the use of biomass and other RESmost commonly are developed for periods of 15, 20 and more years. ...
    ... energy system and problems related to technology management were identified. Achieving optimal and sustainable use of biomass requires detailed planning and management of forest resources, supply chains and biomass conversion facilities, as well as consideration of a large number of social and environmental ...
    ... complete process and only one workshop. In the proposed methodology, the backcasting approach has been used for defining obstacles for maximum utilization of potentials in the current conditions, and for defining criteria and drivers and obstacles for long-term improvement of use and maximization of ...

  • The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis

    Ljiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua (2021)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)
    ... such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher ...
    ... behind, 85,000 affected and € 30 million worth of damage. Floods, torrents and landslides that followed, demonstrated shear natural force and interrupted traffic in several major cities in the north, for days. However, the message was received and understood, which is why local and state governments in ...
    ... middle, while Mt. Shar Planina and Korab to the W-NW and Mt. Suva Gora to the E-SE dom- inate the landscape. Main cities are Tetovo and Gostivar, but there are also many villages on the steep slopes. There is a well-developed state and local road network, railway, and hydro-energetic system Mavrovo ...

  • A Lexical Approach to Acronyms and their Definitions

    Cvetana Krstev, Duško Vitas, Ranka Stanković (2015)
    In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.

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

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R
    ... details on the Valjevo case study area, methodology, and materials, and then, the modeling results of all three hazards and their combination will be discussed and concluded. 31.1.1 The State of the Art The state-of-the-art approaches for solving these and many other natural hazards necessarily involve ...
    ... e, and other socioeconomic elements to a certain level of haz- ard, which further defines the level of risk that these elements endure and must cope with. Valjevo is one of the regional centers in western Serbia and its urban sprawl and economic activities, based on light industry, mining, and agriculture ...
    ... a global and local trend, noticed in both industrialized and devel- oping countries (Guzzetti, Reichenbach, Cardinali, Galli, & Ardizzone, 2005). The evidence of increased exposure to natural disasters is witnessed in extreme rainstorms and related flood- ing and landsliding in 2006 and 2014, when ...

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

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... an ETS and other carbon pricing pol- icies under different conditions, scenarios, and policy frameworks. These studies examine industry competitiveness (Joltreau and Som- merfeld, 2019), employment effects (Chen and Wang, 2023), ETS price dynamics (Li et al.., 2019), trade patterns and spillover ...
    ... European Union and international responses: aggregate and within-coalition results. Energy Pol. 174, 113454. https://doi.org/10.1016/j. enpol.2023.113454. CRU, 2022. Revised ETS and CBAM will drive costs higher and emissions lower. https ://sustainability.crugroup.com/article/revised-ets-and-cbam-wil ...
    ... are reserved, including those for text and data mining, Al training, and similar technologies. B. Pavlović and N. Trtica subject of the economic effects of introducing an ETS. Economic studies utilizing, various methodologies aim to provide policymakers and stakeholders with valuable insights into ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Evaluating the deep learning software tools for large-scale enterprises using a novel TODIFFA-MCDM framework

    Zoran Gligorić, Ömer Faruk Görçün, Miloš Gligorić, Dragan Pamucar, Vladimir Simić, Hande Küçükönder (2024)
    duboko učenje, industrije velikih razmera, MAXC (maksimum kriterijuma), TODIFFA (totalni diferencijal alternative), izbor softvera za dubinsko učenje

  • Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report

    Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić (2021)
    Landslides, Extreme precipitation, Data analysis, IPL project report
    ... re- lating the landslide mechanisms and magnitudes versus the trigger and its aftermath, (4) locating spatial patterns and relationships between landslides and geological and envi- ronmental controls, (5) proposing an overview susceptibility map of the event and (6) landslides numerical modeling on ...
    ... such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher ...
    ... Valjevo cum Fig. 2 Cumulative and daily precipitation from MMS (April–May 2014); Western Serbia-Valjevo and Loznica MMS; Central Serbia-Kraljevo and Kragujevac MMS Table 1 Summary of landslides data from Western and Central Serbia according to the types of movement and types of material involved ...