Претрага
225 items
-
Quantitative landslide risk assessment in the city of Tuzla
In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...... Cvjetko Sandić2, Miralem Mulać3, Petar Begović4 1) University of Belgrade Faculty of Mining and Geology, Đušina 7, Belgrade, Serbia 2) Geological Survey of the Republic of Srpska, Vuka Karadzica 148 B, Zvornik, Bosnia and Herzegovina 3) Headquarters of Civil Protection Tuzla, Aleja Alije Izetbegovića4 ...Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović. "Quantitative landslide risk assessment in the city of Tuzla" in SCG-Xiii International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics and Geotechnical Engineering (2021)
-
New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)
Nevenka Đerić, Nataša Gerzina (2014)... PERCH- NIELSEN K. (eds.): Plankton stratigraphy.- Cambridge University Press, Cambridge, 631—712. SAVEZNI GEOLOŠKI ZAVOD (Federal Geological Survey) (1970): Geološka karta SFR Jugoslavije, 1:500000 [Geo/ogic Map of SFR Yugoslavia, 1:500 000|, Beograd. SCHAALF, A. (1985): Un nouvcau canevas ...Nevenka Đerić, Nataša Gerzina. "New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)" in Geologia Croatica (2014)
-
Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
-
A Twitter Corpus and Lexicon for Abusive Speech Detection in Serbian
Uvredljivi govor na društvenim medijima, uključujući psovke, pogrdni govor i govor mržnje, dostigao je nivo pandemije. Sistem koji bi bio u stanju da detektuje takve tekstove mogao bi da pomogne da internet i društveni mediji postanu bolji virtuelni prostor sa više poštovanja. Istraživanja i komercijalna primena u ovoj oblasti do sada su bili fokusirani uglavnom na engleski jezik. Ovaj rad predstavlja rad na izgradnji AbCoSER-a, prvog korpusa uvredljivog govora na srpskom jeziku. Korpus se sastoji od 6.436 ručno označenih ...... https://www.dagstuhl.de/oasics/ https://www.dagstuhl.de 13:2 Building Language Resources for Abusive Language Detection in Serbian According to a survey from 2014, 60% of Internet users witnessed name-calling, 25% saw that someone was physically threatened, and 24% noticed abuse over a long period [14] ...
... Ruths. A web of hate: Tackling hateful speech in online social spaces. arXiv preprint, 2017. arXiv:1709.10159. 38 Anna Schmidt and Michael Wiegand. A survey on hate speech detection using natural language processing. In Proceedings of the Ąfth international workshop on natural language processing for social ...Danka Jokić, Ranka Stanković, Cvetana Krstev, Branislava Šandrih. "A Twitter Corpus and Lexicon for Abusive Speech Detection in Serbian" in 3rd Conference on Language, Data and Knowledge (LDK 2021), MDPI AG (2021). https://doi.org/10.4230/OASIcs.LDK.2021.13
-
Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija
Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)... deposits have not been rehabilitated, the material from the deposits have scattered over the years in the environment through the aeolian process, gravity and water flows. Tailing material from the analyzed deposits shows permanent toxic pollution of water and agricultural land [13]. All atmospheric water ...
... According to the “2012 Minerals Yearbook, Mining and quarrying trends (advance release)” published by the U.S. Department of the Interior, U.S. Geological Survey, in the U.S. total waste from mining and ore processing in 2012 was around 5210 million tons [4]. It is interesting that in the previous report, there ...
... Commission of the European Communities: Brussels, Belgium, 2003. 4. Ewell, M. 2012 Minerals Yearbook: Mining and Quarrying Trends; U.S. Geological Survey: Reston, VA, USA, 2014. 5. Ministarstvo nauke i zaštite životne sredine. Izveštaj o stanju životne sredine u Republici Srbiji 2003. i 2004; Agencija ...Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić. "Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija" in Energies, MDPI AG (2016). https://doi.org/10.3390/en9110935
-
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
-
Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... Respondents were mechanical and electrical engineers and machine operators with more than five years of maintenance work experience. Table 1 shows the survey results completed by five respondents. Table 1. Membership degree of the fuzzy sets based on expert judgment. Analyst Fuzzy Set Minor Low Moderate ...
... was obtained based on estimations given by the Symmetry 2020, 12, 525 15 of 26 maintenance workers at the quarry. Five employees completed the survey, in which they stated the membership percentage for a specific fuzzy set or sets. The questionnaire was defined in such a way that the overall assessment ...
... detecting potential failures before they occur is an indicator that can only be determined based on experience. As with the failure severity indicator, a survey was conducted, in which maintenance workers completed the questionnaire described in Section 3.2.2. The indicator of the probability of detecting ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
-
Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes
... planning technique (Critical Path Method), because of its suitability for representing the logical structure of environmental protection system. The survey was conducted in the area of the city of Kostolac. The examined area included mining and energy complexes in Kostolac, which incorporate three surface ...
... FDES, etc.) and ranked. This leads to the formation of a basis of activities that will be organized by the project management process. • Based on the survey results, we can propose the project management process elaborated through Critical Path Method as a suitable model for the environmental management ...
... Development, Republic of Serbia. Author Contributions: Jelena Malenović Nikolić and Dejan Vasović conceived and designed the structure of the survey; Jelena Malenović Nikolić and Ivica Ristović performed the application of CPM method and analyzed the empirical data; and Stevan Mušicki and Ivana ...Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović . "Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes" in Energies (2016). https://doi.org/https://doi.org/10.3390/en9121071
-
A necessary and sufficient condition for an algebraic integer to be a Salem number
Dragan Stankov (2019)We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "A necessary and sufficient condition for an algebraic integer to be a Salem number" in Journal de theorie des nombres de Bordeaux (2019). https://doi.org/10.5802/jtnb.1076
-
Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction
Velislava Stoykova, Ranka Stanković (2018)Velislava Stoykova, Ranka Stanković. "Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction" in Advances in Intelligent Systems and Computing, Springer International Publishing (2018). https://doi.org/10.1007/978-3-319-91189-2_16
-
Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...... or have not reached full maturity, it is safe to say that the current level of achievement is not negligible. According to the META- NET extensive survey performed in [20], some important lexical resources for Serbian were developed (corpora and e-dictionaries), as well as applications for basic language ...
... D.: Hybrid sentiment analysis framework for a morphologically rich language. J. Intell. Inf. Syst. 1–22, to appear 19. Nadeau, D., Sekine, S.: A survey of named entity recognition and classification. In: Sekine, S., Ranchhod, E. (eds.) Named Entities: Recognition, Classification and Use, pp. 3–28. ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8
-
Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela
Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić (2010)... countries, considering that all of almost one million of inhabitants use them for drinking purpose. The results of the conducted hydrogeological survey, measurements and modelling show insignificant depletion of the groundwater table, without expansion tendency for the forecasted period of the next ...
... two countries, considering that all of almost one million of inhabitants use them for drinking purpose. The results of the conducted hydrogeological survey, measurements and modelling show insignificant depletion of the groundwater table, without expansion tendency for the forecasted period of the next ...Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić. "Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela" in Vodoprivreda 42 no. 04-Jun, Beograd : Jugoslovensko društvo za odvodnjavanje i navodnjavanje (2010): 223-235
-
Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector
To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatoriBoban Pavlović, Dejan Ivezić, Marija Živković. "Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector" in Energy Policy, Elsevier BV (2020). https://doi.org/10.1016/j.enpol.2020.111936
-
Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine
Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...... Preparation of Questionnaires, Statistical Processing and Fuzzification of Expert Opinions For each of the machines, it was necessary to conduct an expert survey with a certain number of employees working on the machines under consideration. The questions asked included a multiple evaluation option in relation ...
... indicators (phenomena) R, M, and S. That is, the respondents could assign 100% membership to one assessment and allocate them to multiple grades. The survey covered four respondents in the open-pit mine in the “Kolubara” Mining Basin whose estimates are shown in Tables 4 and 5. Table 4 shows the assigned ...Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović. "Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine" in Energies, MDPI AG (2019). https://doi.org/10.3390/en12214044
-
Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)
Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick. "Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)" in Geologica Carpathica, Central Library of the Slovak Academy of Sciences (2024). https://doi.org/10.31577/GeolCarp.2023.26
-
Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije
Jana S. Stojković (2013-09-25)Mineralne vode još od davnina privlače pažnju ljudi i to kako u pogledu istraživanja iproučavanja, tako i u pogledu njihovog iskorišćavanja. Naročito je važno poznavanjesadržaja mikroelemenata u njima, jer su to komponente njihovog hemijskog sastavakoje ih odvajaju od tzv. „običnih“ malomineralizovanih voda.U ovom radu proučavani su odabrani esencijalni mikroelementi (fluor, bor, litijum,kalijum, stroncijum i silicijum), u mineralnim vodama Srbije, pri čemu je analiziranopreko 130 uzoraka mineralnih voda iz različitih geoloških sredina, to jest hidrogeološkihrejona. Cilj ovog istraživanja bio je ...esencijalni mikroelementi, faktori migracije, zakonomernosti rasprostranjenja, hidrogeohemijski procesi, multivarijantna statistička analiza, mineralne vode Srbije... ns of the United States Geological Survey, U.S. Geological Survey, Pp. 1-510. Jana S. Stojković Doktorska disertacija 194 48. Hem, J. D. (1992) Study and interpretation of the chemical characteristics of natural water. 3rd. U.S. Geologycal Survey. 49. Hinman, N. W. (1999) “Silicon, ...
... 68. McGee, K. A., Doukas, M. P., Kessler, R. and Gerlach, T. M. (1997) “U.S. Geological Survey Open-File Report 97-262.” Impacts of Volcanic Gases on Climate, the Environment, and People. U.S. Geological Survey. http://pubs.usgs.gov/openfile/of97-262/of97-262.html. 69. Mittlefehldt, D. W. (1999) ...
... Prilikom preliminarne obrade hidrohemijskih podataka korišćeni su softveri AquaChem 5.1 (Schlumberger Water Services) i PHREEQC 2.18 (U.S. Geological Survey). Rezultat opisane sistematizacije jeste skup hidrohemijskih podataka sačinjen od 14 parametara hemijskog sastava merenih na 110 uzoraka mineralnih ...Jana S. Stojković. "Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-09-25)
-
Indexing of textual databases based on lexical resources: A case study for Serbian
In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...... Vossen, P. (eds.) Proceedings of the Seventh Global Wordnet Conference, GWC 2014. pp. 55–62. Tartu, Estonia (2014) 13. Nadeau, D., Sekine, S.: A Survey of Named Entity Recognition and Classification. In: Sekine, S., Ranchhod, E. (eds.) Named Entities: Recognition, Classification and Use, pp. 3–28. ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Indexing of textual databases based on lexical resources: A case study for Serbian" in Semantic Keyword-based Search on Structured Data Sources : First COST Action IC1302 International KEYSTONE Conference, IKC 2015, Coimbra, Portugal, September 8-9, 2015. Revised Selected Papers, Springer (2015). https://doi.org/10.1007/978-3-319-27932-9_15
-
Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?
Стефан Петровић, Наталија Батоћанин (2020)У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...... Serpentine-Group Minerals - Studies of the natural phases in the system MgO-SiO2-H2O and the systems containing the congeners of magnesium. Geological Survey professional paper, 384-A, pp. 99. United States Government Printing office, Washington. FILIPOVIć, I., MARKOVIĆ, B., PAVLOVIĆ, Z., RODIN, V., MARKOVIĆ ...Стефан Петровић, Наталија Батоћанин. "Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?" in Записници српског геолошког друштва, Српско геолошко друштво, Београд (2020)
-
Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia
Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović . "Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia" in Groundwater: Occurrence and Significance for Human Health, CRC Press, Balkema - Taylor & Francis Group (2014)
-
Environmental Energy Security Indicators as Tools for Environmental Protection
Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост... Renewable and Sustainable Energy Reviews, 2017, Volume 68, 2017, pp. 1020–1032 2. Golušin, M., Munitlak-Ivanović, O., Andrejević, A., Vučenov, S., Survey of socio economic growth in SE Europe – new conceptual frame for sustainability metrics, J Econ. Surv, 2014, Volume 28, pp. 152–168 3. Umbach ...Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević. "Environmental Energy Security Indicators as Tools for Environmental Protection" in Mining and Environmental Protection-MEP 2019, University of Belgrade, Faculty of Mining and Geology (2019)