Претрага
2756 items
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Горњокредне творевине северозападне Србије
Bojan M. Glavaš-Trbić (2013-11-26)У раду су приказане палеогеографске карактеристике и геотектонски положајширег подручја (Јадарског блока и Вардарске зоне) које су утицале на условеталожења, односно карактеристике горњокредних творевина на простору данашњесеверозападне Србије.Описани су карактеристични локални геолошки стубови уз приказ њиховихлитолошких, биостратиграфских и седиментолошких карактеристика. При томе сукоришћена досадашња сазнања о предметном простору изложена у домаћим радовима,и извршена је компарација и корелација са подацима суседних терена, ширеперитетиског ареала.Истраживања у првој фази су вршена на међусобно удаљеним и релативномалим профилима – често само ерозионим крпама ......500 Internal Server Error Internal Server Error
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...Bojan M. Glavaš-Trbić. "Горњокредне творевине северозападне Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-26)
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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 ...... → ∞ ≤ Figure 2. The ratio of reliability R(t) and availability A(t). Energies 2019, 12, 4044 5 of 18 Figure 2 shows the relationship between availability and reliability. It is obvious that the availability requirement is much more stringent than the requirement of reliability, R(t) ≤ A(t) ...
... methodology, M.T. and I.J.; validation, D.I. and T.S.; formal analysis and writing—original draft preparation S.D. Funding: This research and the APC was funded by Ministry of Education and Science of the Republic of Serbia within the framework of Programme of research in the field of technological d ...
... preventive and service maintenance, for reasons of constructive nature, inaccessibility of parts, due to the appearance of corrosion, the mass of the element, and the like. • ‘D’(M)—It is not possible to plan the duration of the intervention and the organization of work. There are a number of complications ...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
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Application of geological strength index for characterization of weathering-induced failures
Berisavljević Zoran, Berisavljević Dušan, Rakić Dragoslav, Radić Zoran. "Application of geological strength index for characterization of weathering-induced failures" in Građevinar 70 no. 10, Zagreb: (2018): 891-903. https://doi.org/10.14256/JCE.1876.2016
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Application of the geodiversity index for assessment of geodiversity in urban areas: an example of the Belgrade city area, Serbia
Ilić Marina, Stojković Sanja, Rundić Ljupko, Ćalić Jelena, Sandić Dejan. "Application of the geodiversity index for assessment of geodiversity in urban areas: an example of the Belgrade city area, Serbia" in Geologia Croatica 3 no. 69, Zagreb, Croatia:Croatian Geological Institute (2016): 325-336
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Funkcionisanje i uticaj epikarsta na režim, bilans i kvalitet podzemnih voda istočnog dela karstnog sistema Suve planine
Branislav Z. Petrović (2020)Epikarst je deo karstne izdani koji se nalazi u okviru nadizdanske zone i predstavlja kompleksnu tačku dodira i mešanja nekonsolidovanog materijala sa površine terena, ostataka karbonatnih stena izmenjenih korozivnim delovanjem vode, živog sveta i njihovih ostataka, koja je delimično zasićena podzemnom vodom. Kompletan sud o stepenu razvoja i prisustva epikarsta na nekom krečnjačkom terenu moguće je doneti uz multidisciplinarna i obavezna detaljna hidrogeološka istraživanja. Poligon za sprovedena istraživanja je bio karstni masiv Suve planine, koja u geološkom i geografskom smislu ...epikarst, karstni sistem, podzemne vode, procesi samoprečišćavanja, hidrohemijski i mikrobiološki procesi u podzemnoj vodiBranislav Z. Petrović. Funkcionisanje i uticaj epikarsta na režim, bilans i kvalitet podzemnih voda istočnog dela karstnog sistema Suve planine, Beograd : [B. Petrović], 2020
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Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation
Franković Maja, Novaković Nevenka, Matović Vesna. "Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation" in Environmental Earth Sciences no. december, Berlin, Heidelberg:Springer-Verlag (2014). https://doi.org/10.1007/s12665-014-3843-z
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Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
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Improvement of geodatabase queries within GeolISS
Ranka Stanković (2008)... Geographic Information/Geomatics project (ISO TC211, http://www.isotc211.org) [5] ESRI: GIS and mapping software (http://www.esri.com) http://pubs.usgs.gov/of/2003/of03-471/richard1/index http://pubs.usgs.gov/of/2003/of03-471/richard2/ https://www.seegrid.csiro.au/twiki/bin/view/CGIModel/GeoSciML http://www ...
... information system of Serbia (GeolISS) represents a repository for digital archiving, query, retrieving, analysis and visualization of geological data. The development and implementation of the GeolISS is managed by a team from the Faculty of Mining and Geology of Belgrade University and financed by Ministry ...
... exploration of such a valuable source of geologic data in view of the diversity and amount of archived data, which is of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and a geological ...Ranka Stanković. "Improvement of geodatabase queries within GeolISS" in Review of the National Center for Digitization, Beograd : Faculty of Mathematics, Belgrade (2008)
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Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije
Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacijaJelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar. "Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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An Approach to Development of Bilingual Lexical Resources
... via the interlingual index, and a bilingual Dictionary of Librarianship, as well as on a TMX document collection generated from aligned Serbian-English journal articles published in INFOtheca, a scientific journal in the area of Library and Information Sciences. The aim of the new resource, ...
... (informatics) and mng (management), the synset index into inf (informatics) and print (printing), whereas the synset librarian belong to categories bibl (librarianship) and pers (persons). 3.2 The Object Model The object UML diagram in Figure 2 offers an insight in the structure of the modeled ...
... not developed within the HLT Group and hence had to be used on an “as is” basis. But even the development of SrpWN is restricted to a certain extent by the fact that Serbian synsets have to be linked to corresponding English synsets by the interlingual index (ILI) [Tufiş, 2004]. Another reason ...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
... logarithm of reduced distance R and the logarithm of the oscillation velocity v. Additionally, we have also taken into account the curveline dependency index ρ (Vukadinović, 1970) between the reduced distance R and the oscillation velocity v. The evaluation of the relationship degree of two variables ...
... effect of elastic seismic wave is movement of particles of the rock mass from its equilibrium position. Such oscillation of the rock mass particles is manifested as a shock and represents one of the negative effects of blasting. In order both to evaluate and control the seismic effect of blasting ...
... velocity of the rock mass and basic parameters affecting its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock mass and the type of blasting, it is the equation of M. A. Sadovski that is used most commonly. In this paper, the law of Sadovsky ...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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E-Connecting Balkan Languages
In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.... added inflected forms of chosen keywords are presented in an editable form in which some of these inflected forms can be deleted or modified. For instance, Serbian word put ‘path’ has two forms of plural: putevi and puti. The second one is restricted to poetical usage and a user can choose to ...
... the Interlingual index (ILI) [22]. Namely, ILI consists of concepts, while wordnets represent lexicalization of concepts in various languages and the way they are connected. Serbian wordnet today consists of more then 15,000 synsets built by app. 25,000 literals. All of them are linked to ...
... University of Belgrade cvetana@matf.bg.ac.rs Ranka Stanković Faculty of Mining and Geology University of Belgrade ranka@rgf.bg.ac.rs Duško Vitas Faculty of Mathematics University of Belgrade vitas@matf.bg.ac.rs Svetla Koeva Dep. of Computational Linguistics Institute ...Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva. "E-Connecting Balkan Languages" in Proceedings of the Workshop Workshop on Multilingual resources, technologies and evaluation for Central and Eastern European Languages, 17 September 2009, eds. C. Vertan, S. Piperidis, E. Paskaleva and Milena Slavcheva, Borovets, Bulgaria : Association for Computational Linguistics Stroudsburg, PA, USA (2009)
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Dvodimenzionalna geometrijska morfometrija prvih gornjih molara hominina sa teritorije Srbije - taksonomska i metodološka analiza
Predrag N. Radović (2022)Primarni cilj ove studije tiče se taksonomske identifikacije fosilnih prvih gornjih molara (M1) hominina pronađenih u Srbiji, primenom metoda dvodimenzionalne (2D) geometrijske morfometrije. U prvoj (metodološkoj) fazi istraživanja ispitana je efikasnost 16 različitih pristupa (geometrijskih modela) u klasifikaciji M1 neandertalaca i anatomski modernog čoveka. Modeli su testirani na dva seta okluzalnih projekcija krunica (n = 34 i n = 64) dobijenih orijentisanjem digitalnih 3D modela u virtuelnom okruženju ili fotografisanjem fizičkih primeraka zuba. Prilikom testiranja primenjena je klasifikacija zasnovana ...2D geometrijska morfometrija, prvi gornji molar (M1), taksonomska identifikacija, neandertalci, anatomski moderni ljudi, Pešturina, Velika Balanica, SrbijaPredrag N. Radović. Dvodimenzionalna geometrijska morfometrija prvih gornjih molara hominina sa teritorije Srbije - taksonomska i metodološka analiza, Beograd : [P. Radović], 2022
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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 ...... diagram of the novel design concept The outlined system (Figure 3) permits an aerodynamic definition of mine ventilation network based on psychrometric recordings and the use of ResNet software, i.e. the establishment of actual aerodynamic resistance of mine chambers and thus the configuration of the ...
... detailed analysis of necessary airflow volumes for the ventilation of individual workplace locations, often with a very complex geometry. The application of CFD software improves the reliability and quality of the apprehension and verification of air amounts needed for the ventilation of workplaces. ...
... estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data acquis ition ventilation and psychrometric parameters ventilation and psychrometric parameters Fig. 3. Architecture of the hybrid system INVENTS 3. Software implementation of INVENTS The ...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 ...... diagram of the novel design concept The outlined system (Figure 3) permits an aerodynamic definition of mine ventilation network based on psychrometric recordings and the use of ResNet software, i.e. the establishment of actual aerodynamic resistance of mine chambers and thus the configuration of the ...
... detailed analysis of necessary airflow volumes for the ventilation of individual workplace locations, often with a very complex geometry. The application of CFD software improves the reliability and quality of the apprehension and verification of air amounts needed for the ventilation of workplaces. ...
... estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data acquis ition ventilation and psychrometric parameters ventilation and psychrometric parameters Fig. 3. Architecture of the hybrid system INVENTS 3. Software implementation of INVENTS The ...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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Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке
... (N). The degree of homo‐ geneity is the measure of the decrease of the intensity of the magnetic field with the distance from the source of the anomaly. For simple models, it is interpreted as a structural index (Thompson, 1982) and defines the type of targets used in the O3DD procedure (Reid et al ...
... or gives the exact positions of the edges of the source, while with the Standard Method the area covered by solutions is somewhat broader. In the case of deeper sources, it was necessary to change the value of the structural index for a more accurate determination of the depth. The Standard O3DD ...
... elected with two levels of peak detection with a structural index of 0.5 considered most suitable for contacts (Ried et al., 1990). A normal level of detection of peaks was used, which included only the maximum values in the analytical signal network (all adjacent cells of the network have a lower value) ...Весна Цветков, Илија Васиљевић, Бранислав Сретеновић, Весна Дамњановић. "Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке" in Књига апстраката 17. Конгрес геолога Србије, Врњачка Бања 17-20. мај, Српско геолошко друштво (2018)
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Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage
... cases, coatings of iron oxide are observed on the grains of minerals. There is a uniformity in the ratio of coarse-grained particles and the fine-grained fraction in the basic mass. Microcrystalline clasts could not be accurately identified. An X-ray powder diagram of the sample and database search ...
... with a detector for secondary electrons (SE), back-scattered electrons (BSE), modern energy-dispersive spectrometer (EDS), a wavelength-dispersive spectrometer (WDS) and a cathodoluminescence detector (CL) were applied to determine the morphology and grain size assessment of minerals as well as ...
... Sofia Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Sofia National Museum of Natural History, Bulgarian Academy of Sciences, Sofia Sofia University “St. Kliment Ohridski”, Sofia University of Mining and Geology “St. Ivan Rilski”, Sofia ...Maja Milošević, Biljana Đorđević, Alena Zdravković . "Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage" in 9th International Conference Mineralogy and Museums, Sofia, Bulgaria, Earth and Man National Museum and Bulgarian Mineralogical Society (2021)
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Old or New, We Repair, Adjust and Alter (Texts)
Cvetana Krstev, Ranka Stanković (2020)U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja... can be easily produced and added to processing. 4 Both of these words are modified in order to suppress the infinite modifications of same characters – letters not used in Serbian Latin alphabet Y and X replace original letters and their replacement. After all modifications of the same pair are done ...
... (2019): 00–00, https://infoteka.bg.ac.rs/ojs/index. php/Infoteka/article/view/2019.19.2.4_en Miller, George A and Elizabeth A Friedman. “The reconstruction of muti- lated English texts”. Information and Control Vol. 1, no. 1 (1957): 38–55 Neme, Alexis Amid and Sébastien Paumier. “Restoring Arabic vowels ...
... Petković, Ljudmila. “Creation and Analysis of the Yugoslav Rock Song Lyrics Corpus from 1967 to 2003”. Infotheca – Journal for Digital Humanities Vol. 19, no. 1 (2019): 5–29. https://infoteka.bg.ac.rs/ojs/index. php/Infoteka/article/view/2019.19.1.1_en Salloum, Wael and Nizar Habash. “Elissa: A dialectal ...Cvetana Krstev, Ranka Stanković. "Old or New, We Repair, Adjust and Alter (Texts)" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.3
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Komparacija metoda XRF i ICP-MS na uzorcima uglja i produkata sagorevanja
Ugljevi niskog ranga – ligniti u Republici Srbiji predstavljaju glavnu energetsku sirovinu koja se koristi za proizvodnju električne energije. Rudarstvo u Srbiji doprinosi bruto dodatoj vrednosti sa 1,8% (2020; https://publikacije.stat.gov.rs/). Sagorevanjem ugljeva niskog ranga u termoelektranama generišu se velike količine elektrofilterskog pepela i pepela, koje često predstavljaju jedan od izvora zagađenja životne sredine usled sadržaja toksičnih elemenata. Dalja upotreba produkata sagorevanja zavisi od njihovog sastava i sadržaja toksičnih mikroelemenata. Svakodnevno sagorevanje lignita u termoelektranama uslovljava konstantan monitoring potencijalno toksičnih ...Branko Kostić, Dejan Prelević, Sabina Kovač, Ksenija Eraković, Dragana Životić. "Komparacija metoda XRF i ICP-MS na uzorcima uglja i produkata sagorevanja" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022., Srpsko geološko društvo (2022)
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The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje
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 ...... is the primary source of energy for many physical and biological processes on Earth and it is one of the basic preconditions for the existence of the living world. In essence, energy received from the Sun is in the form of light and thermal energy. When considering the total impact of the solar ...
... year in solar energy and 0.04 Mtoe per year in biodegradable part of waste (Republic of Serbia, 2013). Total primary energy production from RES in Serbia in 2018 was 2.069 Mtoe (Ministry of Mining and Energy, Republic of Serbia, 2018). In the total domestic production of primary energy from renewable ...
... m Biogas, Solar, Geothermal energy Figure 1: Total production of primary energy from RES in Serbia per energy source (Republic of Serbia, 2018). 3. Potential of solar energy in Serbia Serbia has an average of 272 sunny days and about 2,300 sunny hours, which is more than the European average ...Boban Pavlović, Milica Pešić-Georgiadis. "The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje" in 12th International Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece, Energy Policy and Development Centre (KEPA) of the National and Kapodistrian University of Athens (2019)