Претрага
489 items
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Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu. "Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08910-x
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Improvement of 1D geoelectric sounding by narrowing the equivalence range and identification, quantification and reduction of lateral effects using the tri-potential technique
Filip Arnaut, Branislav Sretenović, Vesna Cvetkov. "Improvement of 1D geoelectric sounding by narrowing the equivalence range and identification, quantification and reduction of lateral effects using the tri-potential technique" in Geofizika, University of Zagreb, Faculty of Science, Department of Geophysics (2022). https://doi.org/10.15233/gfz.2022.39.15
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Short-term forecasting of PM10 and PM2.5 concentrations with Facebook's Prophet Model at the Belgrade-Zeleno brdo
Filip Arnaut, Vesna Cvetkov, Dragana Đurić, Mileva Samardžić-Petrović. "Short-term forecasting of PM10 and PM2.5 concentrations with Facebook's Prophet Model at the Belgrade-Zeleno brdo" in Geofizika (2023). https://doi.org/10.15233/gfz.2023.40.7
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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... is the percentage of the most frequent class in the dataset. In this study, the class of fluid impact logs has the highest number of samples (76%). If an algorithm classifies all logs as fluid impact logs, it could still be considered acceptable. It is also important to investigate where the algorithm ...
... algorithm fails using confusion matrices. In this problem, errors often involve fluid impact logs and gas interference. Setting a maximum threshold for fluid impact logs may be beneficial. After implementation, it is recommended that the classifier provides probabilities for different types rather ...
... optimal operation. Machine learning can assist in continuous monitoring and quality control of pump operation, identifying any disruptions that may impact performance. 5. Visualization and reporting Visualization tools can present data analyses in a manner that is easily understandable to operators ...Maja Trikić. Application of machine learning for diagnosing the operation of a deep well pump in oil production, 2024
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Effects of external noise on threshold-induced correlations in ferromagnetic systems
Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević. "Effects of external noise on threshold-induced correlations in ferromagnetic systems" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.062114
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A survey of greenhouse gases production in central European lignites
Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)... with the results presented by Liu et al. (2020) who pointed out that rewetting of the peatlands ef- fectively reduces N2O emissions. 3.4. Environmental impact of flooded lignites Results concerning GHG production by flooded lignites suggest that they would mainly release CO2. Methane emissions were ...
... 4). This confirms that the studied materials created dis- tinct environmental niches and points to the fact that the indigenous microbial communities inhabiting the lignites may carry out different biogeochemical processes. Environmental vector fitting shows the asso- ciations between geochemical parameters ...
... cially the atmosphere. Air pollution generated by the mining industry has both a local (particulate matter, sulphur and nitrogen oxides) and a global impact (greenhouse gases, GHG). GHG emissions are of partic- ular concern because coal mining and burning comprise a high propor- tion of the anthropogenic ...Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska. "A survey of greenhouse gases production in central European lignites" in Science of The Total Environment, Elsevier (2021). https://doi.org/10.1016/j.scitotenv.2021.149551
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Formative evaluation of e-learning projects with the logical framework approach
... associated, with scientific criterion, of a project (evaluand). The purposes of the evaluation of an e-learning project are different: to determine the impact on beneficiaries' performance, to compare projects, to support the improvement of projects in terms of socio-economic effects and impacts, on individuals ...
... associated, with scientific criterion, of a project (evaluand). The purposes of the evaluation of an e- learning project are different: to determine the impact on beneficiaries' performance, to compare projects, to support the improvement of projects in terms of socio- economic effects and impacts, on ...
... beneficiaries, companies, processes, etc.). Outcomes reveal in the short-term (from 1 to 3 years), or in the long- term (over a period of 4 to 6 years). Impact is the fundamental change, wanted or not wanted, intended or unintended, that occurs in organizations, communities, or systems as a result of ...Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković. "Formative evaluation of e-learning projects with the logical framework approach" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade Metropolitan Univesity (2015)
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Потреба за израдом биланса и оценом расположивих резерви подземних вода Републике Србије
Природне карактеристике Србије, просторна дистрибуција ресурса водe и њихових корисника, као и међусобна интеракција коришћења, заштите вода, као и заштите од вода, условиле су да се подземне воде на читавој територији морају посматрати интегрално, јединствено, комплексно и рационално. Међутим, тренутно је у Републици Србији могуће дефинисати само одлике појединих издани и/или изворишта услед непостојања довољних података за свеобухватну анализу стања ресурса. За оцену притиска на квантитет ресурса подземних вода, што је обавеза према Оквирној директиви о водама ЕУ (ОДВ) ...Зоран Стевановић, Вељко Мариновић, Бранислав Петровић. "Потреба за израдом биланса и оценом расположивих резерви подземних вода Републике Србије" in Записници Српског геолошког друштва, Српско геолошко друштво (2021)
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Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia
Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)... are local authorities and Civil Protection offices (target group), related governmental institutions (in- cluding participants), insurance and assessment agencies, public enterprises that are servicing and maintaining traffic infrastructure, NGO sector, media and general public (end users). Gender ...
... information on dwelling fre- quency and other basic inhabitants’ activities. Some municipalities were used as pilot studies of vulnerability and risk assessment, and these experiences were incorporated in strategies for project sustainability. WP7—Landslide Hazard Maps—Modeling landslide hazard using quick ...
... disseminating project results, simple statistical analysis, SWOT analysis, rainfall data analysis, satellite data analysis, landslide susceptibility assessment for each municipality, news and information etc. Addi- tionally, mobile software application for tablets and android mobile phones was created ...Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović. "Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia" in Advancing Culture of Living with Landslides, Proceedings of 4th World Landslide Forum, Ljubljana 29 May-02 June 2017 3, Berlin : Springer Interantional (2017). https://doi.org/10.1007/978-3-319-53487-9_48
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Postojeće stanje i budući trendovi u preventivnoj zaštiti podzemnih voda Srbije
Vladimir Živanović (2022)Podzemne vode predstavljaju osnovni, a u mnogim zemljama i jedini resurs za javno vodosnabdevanje stanovništva tako da zaštita podzemnih voda predstavlja bitan preduslov za njihovo dugotrajno i održivo korišćenje. Kako u svetu, tako i u Srbiji, zaštita podzemnih voda se najvećim delom svodi na primenu preventivnih mera zaštite. Kod planiranja zaštite većih prostora sve više se koriste metode za ocenu ranjivosti podzemnih voda. Njihova primena je posebno naglašena u karstnim područjima zato što se tu izdvajaju delovi terena sa ...Zaštita podzemnih voda, karte ranjivosti podzemnih voda, karta hazarda, karte rizika od kontaminacije, monitoring podzemnih voda, SrbijaVladimir Živanović. "Postojeće stanje i budući trendovi u preventivnoj zaštiti podzemnih voda Srbije" in Zbornik radova XVI srpskog Simpozijum o hidrogeologiji sa međunarodnim učešćem, Univerzitet u Beograd, Rudarsko-geološki fakultet (2022)
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Regionalna karakterizacija karstnih podzemnih voda dela centralnog Balkana u funkciji njihovog održivog korišćenja i menadžmenta
Veljko J. Marinović (2022)Karstne podzemne vode koristi oko 700 miliona ljudi na svetu, čime je njihov značaj za svetsko stanovništvo nemerljiv. U sklopu doktorske disertacije vršena su istraživanja i analize karstnih sistema dela centralnog Balkana (Srbije, Crne Gore i Savskog sliva Bosne i Hercegovine), kako bi se evaluirao ovaj dragoceni resurs. Analize su vršene na primerima karstnih sistema vrela Perućac, Seljašnica, Mokra i Mlava (Srbija), Oko Bijele i Rijeka Crnojevića (Crna Gora) i vrelo Bosne (Bosna i Hercegovina), kao i na regionalnom ...karstni sistem, podzemna voda, pritisci na kvantitet i kvalitet, menadžment podzemnih vodnih resursaVeljko J. Marinović. Regionalna karakterizacija karstnih podzemnih voda dela centralnog Balkana u funkciji njihovog održivog korišćenja i menadžmenta, Beograd : [V. Marinović], 2022
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Global trend and negative synergy: Climate changes and groundwater over-extraction
Stevanović Zoran (2013)Stevanović Zoran. "Global trend and negative synergy: Climate changes and groundwater over-extraction" in Proceedings of the International Conference “Climate Change Impact on Water Resources”, 17-18 Oct.2013, Belgrade, Belgrade:Institute of Wat. Manag. J.Cerni & WSDAC (2013): 42-45
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Water supply management measures in test areas of IPA1
Stevanović Zoran, Dokmanović Petar, Milanović Saša, Polomčić Dušan. "Water supply management measures in test areas of IPA1" in CC WATERS Climate Changes and Impact on Water Supply, Bekgrade:University of Belgrade-Faculty of Mining and Geology (2012): 341-416
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Groundwater supply in Serbia - an overview of the aquifer importance and their vulnerability on climate changes
Stevanović Zoran, Polomčić Dušan, Dokmanović Petar. "Groundwater supply in Serbia - an overview of the aquifer importance and their vulnerability on climate changes" in CC WATERS Climate Changes and Impact on Water Supply, Bekgrade:University of Belgrade-Faculty of Mining and Geology (2012): 51-60
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An intelligent hybrid system for surface coal mine safety analysis
Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić. "An intelligent hybrid system for surface coal mine safety analysis" in Engineering Applications of Artificial Intelligence (2010)
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Coal homogenization stockyard sizing “Tamnava – Zapad” case study
... negative impact on the combustion process, whether because of combustion problems, or impact on the power plant equipment, or environmental impact. Although each parameter has a dominant impact on one of the listed system segments, the fact is that such variations have a negative impact on all of ...Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer. "Coal homogenization stockyard sizing “Tamnava – Zapad” case study" in Proceedings of 13th International Symposium Continuous Surface Mining, ISCSM 2016, / (2016)
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Terminological and lexical resources used to provide open multilingual educational resources
Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...... the increasing number of students attending universities and numerous possibilities provided by e-learning applications, the Technology Enabled Assessment (TEA) has shown significant growth as well. Further on, Intelligent Tutoring Systems (ITS) were developed and incorporated in the learning process ...
... process, while later work also included spoken language technologies. The advances in these fields allowed for a more time effective assessment 1 Massive Open Online Course - an online course aimed at unlimited participation and open access via the web through TEA, which is a considerable advantage ...
... assistants rely greatly on various NLP tools to help them cater to a large number of students from all over the world. These tools may include assessment of text and speech, writing assistants, automatic generation of exercises, wrap up questions and online instructional environments [3]. The main ...Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić. "Terminological and lexical resources used to provide open multilingual educational resources" in The Seventh International Conference on eLearning (eLearning-2016), 29-30 September 2016, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2016)
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An Approach to Development of Bilingual Lexical Resources
... scientific areas. This classification is modeled by the SynsetCategory class using the appropriate category codes. Thus, for example, the synset impact is classified into categories inf (informatics) and mng (management), the synset index into inf (informatics) and print (printing), whereas the ...
... that Serbian synsets have to be linked to corresponding English synsets by the interlingual index (ILI) [Tufiş, 2004]. Another reason is the assessment that a bilingual resource in tune with Bibliša’s specifics would substantially contribute to its performance. Hence, Biblimir was born. 3.1 ...Stanković Ranka, Obradović Ivan, Trtovac Aleksandra. "An Approach to Development of Bilingual Lexical Resources" in Proceedings of the Fifth Balkan Conference in Informatics BCI 2012, Workshop on Computational Linguistics and Natural Language Processing of Balkan Languages – CLoBL 2012, September 2012, Novi Sad : BCI (2012)
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... "Nepričava" - Lajkovac. Beograd: Rudarsko-geološki fakultet Univerziteta u Beogradu. 9 TRAJKOVIĆ, S., LUTOVAC, S. and RAVILIĆ, M. (2013) Assessment of impact on environment and constructed facilities owing to blasting at open pit mine "Nepričava". Underground Mining Engineering, 22, pp. 33-48. ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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Cutting elements of bucket wheel excavators in lignite opensast mines: Methodology and performed solutions
Dragan Novaković, Predrag Jovančić (2016)Bucket and cutting elements geometry (teeth and hardened steel) have very powerful impact on effective operation of bucket wheel excavator, and that`s why, problems of optimal geometry of elements in specific conditions always are of special interest in mining science and technique. If we want to achieve satisfactory utilization of bucket wheel excavator, it is necessary to modulate geometry material characteristics and technological parameters, as regards bucket wheel excavator work regime, and bucket wheel working performances, and also bucket ...Dragan Novaković, Predrag Jovančić. "Cutting elements of bucket wheel excavators in lignite opensast mines: Methodology and performed solutions" in 13th International symposium Continuous Surface Mining ISCSM 2016, 12-14 September 2016, Belgrade – Serbia, Belgrade : Yugoslav Opencast Mining Committee, Belgrade (2016)