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602 items
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INVENTS: A Hybrid Mine Ventilation Planning and Design System
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... standard C code. In the KAPPA-PC system, the components of the domain are represented by objects that can be either classes or instances within classes (Fig.9). The relationships among the objects in a model can be represented by linking them together into a hierarchical structure. Thus the modified OOA model ...
... Belgrade Abstract: Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced ...
... Ventilation design is just one element or phase of the novel design approach. The component diagram on Fig.1 illustrates the proposed method that can be divided into six separate components. The first phase of the outlined methodology is data acquisition. In contemporary mining practice extensive ...Lilić Nikola, Stanković Ranka, Obradović Ivan. "INVENTS: A Hybrid Mine Ventilation Planning and Design System" in Proceedings of International Scientific Conference of FME Session 4: Automation Control and Applied Informatics , Hong Kong : iConcept Press (2013)
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INVENTS: a hybrid system for subsurface ventilation analysis
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... standard C code. In the KAPPA-PC system, the components of the domain are represented by objects that can be either classes or instances within classes (Fig.9). The relationships among the objects in a model can be represented by linking them together into a hierarchical structure. Thus the modified OOA model ...
... Belgrade Abstract: Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced ...
... Ventilation design is just one element or phase of the novel design approach. The component diagram on Fig.1 illustrates the proposed method that can be divided into six separate components. The first phase of the outlined methodology is data acquisition. In contemporary mining practice extensive ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "INVENTS: a hybrid system for subsurface ventilation analysis" in Proc. of International Scientific Conference of FME, September 2000, Ostrava, FME (2000)
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Keyword-Based Search on Bilingual Digital Libraries
This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović. "Keyword-Based Search on Bilingual Digital Libraries" in Semantic Keyword-Based Search on Structured Data Sources - Second COST Action IC1302 International KEYSTONE Conference, IKC 2016, Springer (2017). https://doi.org/10.1007/978-3-319-53640-8_10
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An aproach to Implementation of blended learning in a university setting
... its specific permissions. Besides the administrator, the two most important are the teacher, who can 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. ...
... users, akin to an internal e-mailing system. Finally, Moodle offers several types of reports that can be divided into two groups: global reports and reports at the course level. Global reports can be used for a systematic insight in both system parameters of the Moodle platform and data related ...
... the archive status. For each course the administrators can define the number of most recent copies to be kept by Moodle, and set copies of the backup report to be sent by e-mail. More details on Moodle and its application in practice can be found in [4]. Figure 3. Number of visits ...Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović . "An aproach to Implementation of blended learning in a university setting" in Proceedings of the Second International Conference on e-Learning, eLearning 2011, September 2011, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2011)
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A Lexical Approach to Acronyms and their Definitions
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.... an entity and its name and acronym is not one-to-one. The name can change in time and some shortened variants can be in use, translated names can exhibit serious variations in used lexica and syntactic forms, original acronyms can be trans- lated (ILO – International Labour Organization vs. MOR ...
... a majority of them is never lexicalized, either be- cause of the limited scope of their use or because they can- not be pronounced or used as other words of the language. These new words can pose severe problems to many NLP applications because they represent the unknown words for them: applications ...
... Council vs. VBC – Svetski bokserski savez), a pronounced acronym can be used to- gether with the original and translated name (Bi-Bi-Si for BBC – British Broadcasting Corporation – Britanska ra- diodifuzna korporacija). Thus, this relation can rather be represented as a network of complex object (see Fig ...Cvetana Krstev, Duško Vitas, Ranka Stanković. "A Lexical Approach to Acronyms and their Definitions" in Proceedings of the 7th Language & Technology Conference, November 27-29, 2015, Poznań, Poland, Springer (2015)
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A WordNet Ontology in Improving Searches of Digital Dialect Dictionary
In this paper, we present a method for automatic generation of a digital resource, which connects all indirect synonyms of a dialect term to all indirect synonyms of a corresponding term in the standard language, aiming to improve the search of a digital dialect dictionary. The method uses SWRL rules defined in the Serbian WordNet ontology to identify sets of synonymous words. It also uses e-dictionaries to produce correct lemmas in standard language that users usually employ in searches. ...... digital dialect dictionaries The challenging task of digitizing a dialect dictionary can be solved in different ways considering software platform, database storage, search framework and additional management tools. It can be a Web application that uses relational databases, like Oracle used for storing ...
... information. For example, the retrieval of information in EDD can be limited to the structural units in the entries (heads, definitions, citations, comments, variants, etc.), while logical filters combining basic Boolean operators and metadata can be used for advanced search options. Similar techniques are ...
... or similar meaning in a given context. Synsets respect the syntactic categories noun, verb, adjective, and adverb and can be interconnected by semantic relations, while word forms can be connected by lexical relations. In SWN ontology there are currently 2,243 verb synsets defined as ontology individuals ...Miljana Mladenović, Ranka Stanković, Cvetana Krstev. "A WordNet Ontology in Improving Searches of Digital Dialect Dictionary" in New Trends in Databases and Information Systems: ADBIS 2017 Short Papers and Workshops - SW4CH (Semantic Web for Cultural Heritage) 767, Springer International Publishing (2017). https://doi.org/10.1007/978-3-319-67162-8_37
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Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas
During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović. "Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas" in 31st International Conference Ecological Truth & Environmental Research-EcoTER'24, Sokobanja, 18-21. jun 2024, Bor : Tehnički fakultet u Boru (2024)
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Long-term rockslope monitoring and rockfall prediction
Miloš Marjanović, Biljana Abolmasov, Marko Pejić, Jelka Krušić. "Long-term rockslope monitoring and rockfall prediction" in Proceedings of 3rd European Regional Conference of IAEG/ Athens/ Greece/ 6-10 October 2021, International Association for Engineering Geology and the Environment (2021)
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The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua. "The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis" in Environmental Earth Sciences, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s12665-021-09392-1
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Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement
Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić,. "Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement" in International scientific conference Challenges in Applied Geology and Geophysics: 100th Anniversary of Applied Geology at AGH University of Science and Technology, Book of abstracts, Kraków, Poland, 10-13. Sep. 2019, Kraków, Poland : AGH University of Science and Technology (2019)
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A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals
This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...... detail in Section 2. When performing such a search the user can make use of a form with predefined fields for the most commonly used data: author’s name, words from an article title, year of publication, and article keywords. The search can be performed either in the English or the Serbian part of ...
... parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and ...
... texts, which enable users to compose queries both with simple and multiword keywords in more than one language. In addition to that, user queries can be expanded, both semantically and morphologically, the latter being very important in highly inflective languages, such as Serbian. Open access ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić. "A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals" in Proceedings of the 8th International Conference on Language Resources and Evaluation, LREC 2012, May 2012, Istanbul, Turkey, Istanbul, Turkey : European Language Resources Association (2012)
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A Fuzzy Expert Model for Availability Evaluation
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 ...... indicators have the same form. Values j can be an hour, a moto hour, etc., depending on the analyzed indicator. Regarding the number of linguistic variables, it can be found that seven is the maximal number of rationally recognizable expressions that human can simultaneously identify [8]. Therefore ...
... Additional nine outcomes can be separated for Ω = 2, and MIN value can be determined for each of those. Further on, maximal value (5) is identified among mentioned minimal values, MAX (MINΩ = 2) = 0.11. In the same way, other outcomes are calculated. All these outcomes can be grouped around sizes ...
... shut down. The availability can be calculated by the time coefficient, which includes mention time state. For time state tracking, specific IT structure is necessary. Such structure is often very expensive and unavailable. An alternative is the expert system, which can absorb partial indicators ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)
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Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs
Saša Milanović, Ljiljana Vasić (2021)Saša Milanović, Ljiljana Vasić. "Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs" in Hydrogeology Journal, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10040-020-02280-1
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Using Metadata For Content Indexing Within An OER Network
Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)... other institutions, academic or entrepreneurial equally, which might join the BAEKTEL network in the future, can be easily integrated in the current network. In addition, the framework can integrate OER that are not created by institutions within the network, the only condition being that those ...
... _ other institutions, academic or entrepreneurial equally, which might join the BAEKTEL network in the future, can be easily integrated in the current network. In addition, the framework can integrate OER that are not created by institutions within the network, the only condition being that those resources ...
... of the course and degree of interactivity. Interactivity level indicates the degree to which the learner can influence the aspect or behaviour of the resource. Value for this field can be "very low", fora document intended for printing; "low",a video clip with play and pause controls; "medium" ...Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci. "Using Metadata For Content Indexing Within An OER Network" in Proceedings of the Fifth International Conference on e-Learning, eLearning 2014, September 2014, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2014)
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Towards Automatic Definition Extraction for Serbian
U radu su prikazani preliminarni rezultati automatske ekstrakcije kandidata za definicije rečnika iz nestrukturiranih tekstova na srpskom jeziku u cilju ubrzanja razvoja rečnika. Definicije u rečniku Srpske akademije nauka i umetnosti (SANU) korišćene su za modelovanje različitih tipova definicija (opisnih, gramatičkih, referentnih i sinonimskih) koje imaju različite sintaksičke i leksičke karakteristike. Korpus istraživanja sastoji se od 61.213 definicija imenica, koje su analizirane korišćenjem morfoloških e-rečnika i lokalnih gramatika implementiranih kao pretvarači konačnih stanja u paketu za obradu korpusa otvorenog ...... Definition extraction task can be formalized either as a sentence classification task (i.e., containing term-definition pairs or not) or a sequential labelling task (i.e. identifying the boundaries of terms and definitions). The previous work on definition extraction can be classified as follows: 1) ...
... moment cover 57% of dictionary definitions, 83% of which were fully recognized. The analysis has shown that many definitions have a structure that can be modelled, as evidenced by the statistics of definitions grouped by type. These models were used to retrieve noun definitions from a 1.4-million-word ...
... products derived from them, special attention is paid to automatic or semi-automatic performance of some tasks. The use of electronic dictionaries can speed up the work on dictionary production by automatically associating some grammatical information to lemmas, namely, word class, word forms and different ...Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić. "Towards Automatic Definition Extraction for Serbian" in Proceedings of the XIX EURALEX Congress of the European Assocition for Lexicography: Lexicography for Inclusion (Volume 2). 7-9 September (virtual), Democritus University of Thrace (2021)
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Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine
Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić. "Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945617
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Formative evaluation of e-learning projects with the logical framework approach
... evaluand, the sector/field, the developmental stage of the project, a wide range of evaluation approaches can be identified. On the basis of the developmental stage of a project the evaluation can be: formative (or prospective, or ex-ante), interim, summative (or ex-post). The formative evaluation ...
... different elements of e-learning. Four groups of definitions can be identified: technology-driven, delivery-system-oriented, communication-oriented, educational-paradigm-oriented [15]. According to this last one perspective, E-Learning can be defined as "the use of new multimedia technologies and ...
... development. The summative evaluation aims to take lessons, insights, judgment and awareness about taken decisions and projects. Evaluations can apply to various evaluands, such as products, projects, programs, organizations. The typical evaluand in the field of Education and Learning is the ...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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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 ...... average emission factors 4 Emission factors can vary widely for each fuel among end-use sectors, depending on the technology implemented. For example: a gasoline car with a catalytic converter can emit 1.4 kt of NOX per Mtoe, while a diesel truck without filters can emit more than 50 kt of NOX per Mtoe 4 ...
... pollutants emissions. For the case of Serbia data can be found in energy balances of the country 7. The trend and the structure of primary energy consumption for the last ten years are given in Figure 2. In 2017 total primary energy supply was 667890 TJ 8. It can be characterized as highly fossil intensive ...
... 27.62% of final energy consumption, followed with the transport sector with 25.73%. From figure 4b can be seen that 63.63% of final energy is combusted with end consumers. Only consumption in industry can be considered as a controlled and regulated. The rest is taking place in internal combustion engines ...Marija Živković. "Effects of Energy Production and Consumption on Air Pollution in Serbia" in Mining and Environmental Protection-MEP 2019, University of Belgrade, Faculty of Mining and Geology (2019)
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Low-temperature phase transition and magnetic properties of K3YbSi2O7
Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica... formed by terminal nonbridging O atoms can be identified [Figs. 1(a) and 1(b)]. These common O atoms form a pseudo-kagome pattern composed of triangles and hexagons (O’Keeffe & Hyde, 1996). Unlike a regular kagome pattern, however, smaller and larger triangles can be distinguished which surround the ...
... formed by terminal nonbridging O atoms can be identified [Figs. 1(a) and 1(b)]. These common O atoms form a pseudo-kagome pattern composed of triangles and hexagons (O’Keeffe & Hyde, 1996). Unlike a regular kagome pattern, however, smaller and larger triangles can be distinguished which surround the central ...
... space group P63/mmc and is associated with the centre (0,0,0) of the first Brillouin zone. Therefore, the �0-K3YbSi2O7 can be classified as properly ferroelastic. Furthermore, there can be also a trivial fully symmetrical �1 + distortion that retains the symmetry of �0-K3YbSi2O7. Using the input data ...Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović. "Low-temperature phase transition and magnetic properties of K3YbSi2O7" in Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, International Union of Crystallography (IUCr) (2021). https://doi.org/10.1107/S2052520621006077
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Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... develop a plan to support maintenance. They can plan activities related to the identification of support states in the future, time of reconstruction, and type of support that can be used to decrease the progressive deformation. An effective deformation forecast can result in a decrease of costs and delays ...
... develop a plan to support maintenance. They can plan activities related to the identification of support states in the future, time of reconstruction, and type of support that can be used to decrease the progressive deformation. An effective deformation forecast can result in a decrease of costs and delays ...
... Z(t) = [ zij ] M×N = z11 z12 z13 · · · z1N z21 z22 z23 · · · z2N ... ... ... . . . ... zM1 zM2 zM3 · · · zMN , (5) As can be seen, the obtained data can be treated as a multichannel time series. Multi- variate singular spectrum analysis is a very useful tool to process such datasets. ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710