Претрага
978 items
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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
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Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу
Милана Мичета (2024)Подземне воде представљају изузетно важан природни ресурс, као и важну компоненту система, којим је представљено тло. У складу са тим, приликом пројектовања плитких темеља на крупнозрном тлу, односно приликом анализе граничне носивости и слегања, треба узети у обзир и утицај воде. Верује се да ниво подземне воде значајно смањује носивост тла, док се слегања значајно повећавају. Terzaghi (1943) је први сугерисао да се потапањем масе тла, његова носивост смањује за половину, док се слегање удвостручује. Циљ овог рада је ...... AyropcTBo – HekoMepnujaznHo (CC BY-NC) AyTopcTBo – HeKoMepnujajHo — 0e3 r pepana (CC BY-NC-ND) AyTOpcTBO — HeKOMCPIIHJAJIHO — JIeJIHTH IIOJ1 HCTHM yCJIOBHMa (CC BY-NC-SA) Ayropcrsno – 0e3 ıiipepana (CC BY-ND) m r —R O — — AyTOpcTBO — JeJIHTH IOJ HCTHM yCJIOBHMa (CC BY-SA) (3aokpyotcume ...
... ĐDAKVJITET z! - nyOHHa yrHiaja IIpoMeHe HanmoHa H - ne0JbuHa coja KOjH Ce CJIOOKC Da – arMocQbepcku rnpHrHcaK , 0.75 Š_ = 144· (BŽ) (4.1.4.5) R R Ako ce pajui o (bHHOM H rIpanmiHacTOM HecKy ca Nao > 15, Neo je norpeoHo nonecHTH KopHirhePeM (bakTopa Kopekrnuje, KoOjH cy HIpeJUIO'KHm Terzaghi ...
... 92 kPa + 231.79 kPa + 42.6 kPa Ra ršai 315.31 kPa MuznaHna Muuera, T615/21 R kN kN — = 2.4·kPa·17.05·1·1·1+(19.2—·1.1m+20 A m? —3·0.4}?1)·7.96·1·1 m npuzor 0p. 6 B) Tpehu cnyuaj HIIBs= 3.9 m B-im r EI [? ~ iji _ E P % s ž - Hsa>B Ppr i I f % P | a j\ Pu ha =4 .7 m Ra ...Милана Мичета. Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу, 2024
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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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Metodologija proračuna sanacije klizišta šipovima
Klizišta u Srbiji, u najvećem broju slučajeva, jako zavise od geoloških uslova u terenu i svako klizište ima svoje specifičnosti koje moraju da se odrede geotehničkim istraživanjima. Stoga su u radu prvo prikazane osnovne karakteristike klizišta u Srbiji, kao i postupci njihovog istraživanja. Zatim su prikazani proračuni sanacije klizišta vertikalnim šipovima. Metodologija proračuna je složena, jer podrazumeva interakciju klizišta i stabilizirajućih šipova. Prilikom određivanja bočne otpornosti tla oko šipova koristi se metoda Brinč Hansena koja uzima u obzir trodimenzionalne ...klizišta, geotehnička istraživanja, bočna nosivost šipova, interakcija klizišta i šipa, analiza stabilnostiSlobodan Ćorić, Dragoslav Rakić, Stanko Ćorić, Dušan Berisavljević. "Metodologija proračuna sanacije klizišta šipovima" in V simpozijum društva za Geotehniku R. Severne Makedonije, ISRM Specialized Conference, Društvo za Geotehniku Severne Makedonije (2022)
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Distribution of major and trace elements in the Kovin lignite (Serbia)
Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...... anaerobic conditions in the palaeomire. The very strong correlation of Fe with As (r=0.94), Cd (r=0.97), Co (r=0.82), Cr (r=0.91), Ni (r=0.87), Se (r=0.91), and As with Cd (r=0.96), Co (r=0.79), Cr (r=0.79), Ni (r=0.81), Se (r=0.93) con firms the close interrelation of the aforementioned elements with ...
... RADIVOJEVIĆ, D., SZTANÓ, O., SYNAK, R., UJSZÁSZI, K. & PÓC SIK, M. (2013): Progradation of the paleoDanube shelf margin across the Pan nonian Basin during the Late Miocene and Early Pliocene.– Global Planetary Change, 103, 168–173. doi: 10.1016/j.gloplacha.2012.06.007 MEIJ, R. (1995): The distribution of ...
... DALE et al., 1999). However, an ”organic” form of Cd is also possible (YUDOVICH et al., 1985). The very strong correlation of Cd–Sdb (Table 8), Cd–Fe (r=0.97) clearly indicates the close connection of Cd with pyrite in seam I. Selenium could be present in organic and inorganic form (YUDOVICH & KET RIS ...Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović. "Distribution of major and trace elements in the Kovin lignite (Serbia)" in Geologia Croatica, Croatian Geological Survey (2019). https://doi.org/10.4154/gc.2019.06
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‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions
Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban. "‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions" in Boletín de la Sociedad Española de Cerámica y Vidrio, Elsevier BV (2020). https://doi.org/10.1016/j.bsecv.2020.06.005
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LRMI markup of OER content within the BAEKTEL project
... platform for management of academic and entrepreneurial knowledge, In Proceedings of IFKAD, Bari, Italy, 2014. [8] Stanković, R., Kitanović, O., Obradović, I., Linzalone, R., Schiuma, G., Carlucci, D., Using Metadata For Content Indexing Within An Oer Network. In Proceedings of The Fourth International ...
... Learning Object Metadata Survey, CanCore Initiative, 2004. http://www.irrodl.org/index.php/irrodl/article/view/1 95/277 [6] Obradović, I., Stanković, R., Using technology for knowledge transfer between academia and enterprises Proceedings of IFKAD, Matera, Italy, pp. 788-801, 2014. [7] Carlucci ...
... linked open data: the case of OpenCourseWare", Program: electronic library and information systems, Vol. 48 Iss: 1, pp.16 - 40, 2014. [11] Meusel, R., Petrovski, P., Bizer, C.: The webdatacommons microdata, rdfa and microformat dataset series. In: ISWC, 2014. [12] Paulheim, H. What the Adoption ...Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić. "LRMI markup of OER content within the BAEKTEL project" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade : Belgrade Metropolitan Univesity (2015)
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GNSS Time Series as a Tool for Seismic Activity Analysis Related to Infrastructure Utilities
Sanja Tucikešić, Ankica Milinković, Branko Božić, Ivana Vasiljević, Mladen Slijepčević . "GNSS Time Series as a Tool for Seismic Activity Analysis Related to Infrastructure Utilities" in Contributions to International Conferences on Engineering Surveying. Springer Proceedings in Earth and Environmental Sciences, Dubrovnik, Croatia, October 22-23, 2020, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-51953-7_21
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Building learning capacity by blending different sources of knowledge
... ventures and public support mechanisms. R&D Management, 33: 107–115. http://www.irrodl.org/index.php/irrodl/article/view/195/277 Title Obradović, I., Stanković, R., Prodanović, J., & Kitanović, O. ...
... eLearning-2013, 65-70. Rhoads, R. A., Berdan, J., & Toven‐Lindsey, B. (2013). The Open Courseware Movement in Higher Education: Unmasking Power and Raising Questions about the Movement's Democratic Potential. Educational Theory, 63(1), 87-110. Stanković, R., Obradović, I., Kitanović, O., Prodanović ...
... eLearning 2011, 61-66. Stanković, R., Obradović, I., Kitanović, O., & Kolonja Lj. (2012). Building Terminological Resources in an e-Learning Environment. In Proceedings of the Third International Conference on e-Learning, eLearning-2012, 114-119. Stanković, R., Obradović, I., Krstev, C., & Vitas ...Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić. "Building learning capacity by blending different sources of knowledge" in International Journal of Learning and Intellectual Capital (2016). https://doi.org/10.1504/IJLIC.2016.075698
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Dosadašnja saznanja o bijelim boksitima na prostoru Crne Gore
Mia Jovanović, Slobodan Radusinović, Vladimir Simić. "Dosadašnja saznanja o bijelim boksitima na prostoru Crne Gore" in Geološki glasnik (2023)
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Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)
Kostadin J. Jovanov (2016-06-24)Leţišta uglja „Suvodol“, „Brod-Gneotino“ su u eksploataciji, a leţište uglja „Ţivojno“je u fazi pripremi. Nalaze se u krajnjem jugoistočnom i juţnom delu Pelagonijskekotline. Sva tri leţišta stvorena su u neogenim sedimentima u jezerskim uslovimasedimentacije u zoni kontakta sa prekambrijumskim kristalastim stenama. Kod sva trileţišta ugalja se javljaju više slojeva različite debljine, u okviru kojih se nalaze klastičnisedimenti (gline, peskovi i dr.). U podini ugljenog basena nalaze se kristalaste steneprekambrijumske starosti.Teren u okolini leţišta uglja karakteriše se umereno kontinentalnom klimom, ...ugalj, podzemne vode, površinske vode, neogeni kompleks, izdani,transmisibilnost, nivo podzemne vode, sniţenje nivoa... izmeĎu nivoa podzemnih voda krovinske i meĎuslojne izdani ukazuju na veze koje su jako promenljive i to: r=0,79 (veoma čvrsta veza), r=0,67 (relativno čvrsta veza), r=0,43 i r=0,19 (slaba veza) do r=0,07 (nepostojanje korelacione veze). Slika 3.9. Korelaciona zavisnost između nivoa podzemnih voda ...
... 2012 Vrednosti koeficijenata korelacije izmeĎu nivoa podzemnih voda meĎuslojne i podinske izdani kreću se od r=0,88 (veoma dobra veza), r=-0,65 (relativno čvrsta veza), do r=0,47 i r=0,17 (slaba korelaciona veza). Dreniranje izdani vrši se isticanjem preko bušotina sa samoizlivom (tabela 3.3) ...
... pojedinim delovima korelaciona veza je veoma slaba, r = 0,17 (slika 3.23), do veoma čvrste veze, r = 0,96 (slika 3.24). I sa podinskom izdani korelaciona zavisnost moţe biti slaba skoro i da ne postoji (r=0,17), do relativno čvrsta veza sa r = 0,71 (slika 3.25 i 3.26). Kostadin J. Jovanov ...Kostadin J. Jovanov. "Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-24)
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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 ...... ‘(gold OR Au) AND (Bor OR Bor district)’. For evaluation standard measures were used, namely Precision P = tp/(tp+ fp), Recall R = tp/(tp+ fn), and F- measure F = 2 ·P ·R/(P +R), where tp – true positive is the number of relevant documents retrieved, fp – false positive is the number of non-relevant documents ...
... negative is the number of relevant documents that were not retrieved. During the evaluation ranked responses were offered to users, and the measures P and R were calculated for sets containing the first i choices of- fered, where i ∈ [1, 120] [8]. In this way, curves showing the dependency between precision ...
... Benjamins Pub. Co., Amsterdam/Philadelphia (2009) 14. Salton, G., McGill, M.J.: Introduction to modern information retrieval (1983) 15. Stanković, R., Trivić, B., Kitanović, O., Blagojević, B., Nikolić, V.: The Develop- ment of the GeolISSTerm Terminological Dictionary. INFOtheca 12(1), 49a–63a ...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
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Using technology for knowledge transfer between academia and enterprises
Ivan Obradović, Ranka Stanković (2014)... support mechanisms. R&D Management, 33: 107–115. Obradović, I., Stanković, R., Prodanović, J., & Kitanović, O. (2013). A TEL Platform Blending Academic and Entrepreneurial Knowledge. In Proceedings of the Fourth International Conference on e-Learning, eLearning-2013, 65-70. Rhoads, R. A., Berdan, J ...
... Theory, 63(1), 87-110. Stanković, R., Obradović, I., Kitanović, O., & Kolonja Lj. (2012). Building Terminological Resources in an e-Learning Environment. In Proceedings of the Third International Conference on e-Learning, eLearning-2012, 114-119. Stanković, R., Obradović, I., Krstev, C., & Vitas ...Ivan Obradović, Ranka Stanković. "Using technology for knowledge transfer between academia and enterprises" in Knowledge and Management Models for Sustainable Growth, Proc. of IFKAD 2014, 9th International Forum on Knowledge Asset Dynamics, 11-13 June 2013, Matera, Italy, Bari : IFKAD (2014)
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Some examples of interactions between certain rare earth elements and soil
... Fujinaga, K. Nakamura, Y. Takaya, K. Kitamura, J. Ohta, R. Toda, T. Nakashima, H. Iwamori, Nature Geoscience 4 (2011) 535 (https://doi.org/10.1038/ngeo1185) 9. Y. Wan, C. Liu, J. Rare Earths 23 (2005) 377 10. G. W. Beall, B. H. Ketelle, R. G. Haire, G. D. O'Kelley, ACS Symposium Series 100 (1979) ...
... Bhatnagar, E. C. Lima, J. Mol. Liq. 221 (2016) 954 (https://doi.org/10.1016/j.molliq.2016.06.076) 2. F. Tommasi, P. J. Thomas, G. Pagano, G. A. Perono, R. Oral, D. M. Lyons, M. Toscanesi, M. Trifuoggi, J. Arch. Environ. Contam. Toxicol. 81 (2021) 531 (https://doi.org/10.1007/s00244-020-00773-4) 3. ...
... Series 68 (2011) 259 13. G. Haxel, US Geological Survey 87 (2002) (https://pubs.usgs.gov/fs/2002/fs087-02) 14. C. Ng, J. N. Losso, W. E. Marshall, R. M. Rao, Bioresource technology 85 (2002) 131 (https://doi.org/10.1016/S0960-8524(02)00093-7) 15. S. McLeod, Notes on soil techniques (1973) 73 16 ...Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski. "Some examples of interactions between certain rare earth elements and soil" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC211006095N
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GIS supported bauxite deposit geological data as a tool for mining operations design
Milutinović Aleksandar, Ganić Aleksandar, Ganić Meri, Miljanović Igor. "GIS supported bauxite deposit geological data as a tool for mining operations design" in The Geology in Digital Age : proceedings of the 17th Meeting of the Association of European Geological Societies, MAEGS 17, Belgrade, [14-18. 09.] 2011 1, Beograd:The Serbian Geological Society (2011): 27-32
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Updating the database of the spatial information system for capital underground mining rooms
Milutinović Aleksandar, Ganić Aleksandar, Miljanović Igor, Gajić Grozdana. "Updating the database of the spatial information system for capital underground mining rooms" in 4th Balkan Mining Congress BALKANMINE 1, Ljubljana, Slovenija:Faculty of Natural Sciences and Engineering (2011): 629-633
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Primena savremenih geodetskih tehnologija u funkciji određivanja zapremina na površinskim kopovima uglja
Pandžić Slobodan, Milutinović Aleksandar, Ganić Aleksandar, Pandžić Jelena. "Primena savremenih geodetskih tehnologija u funkciji određivanja zapremina na površinskim kopovima uglja" in V Međunarodna konferencija UGALJ 2011 1, Zlatibor:Rudarsko-geološki fakultet, Beograd (2011): 244-253
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Optimal determination of the of underground rooms technology model for given conditions
Tokalić Rade, Ganić Aleksandar, Milutinović Aleksandar, Mitić Saša. "Optimal determination of the of underground rooms technology model for given conditions" in PODEKS ’11 – V stručno sovetuvanje na tema Tehnologija na podzemna eksploatacija na mineralni sirovini 1, Makedonska Kamenica:Sojuz na rudarskite i geološkite inženeri na Makedonija (2011): 27-35
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Stabilization and monitoring of the slope deformation appearance on marl open-pit Filijala in order to minimize the risk of exploitation process interruption
Gojković Nebojša, Čebašek Vladimir, Ganić Aleksandar, Milutinović Aleksandar. "Stabilization and monitoring of the slope deformation appearance on marl open-pit Filijala in order to minimize the risk of exploitation process interruption" in V-th International geomechanics conference 1, Varna, Bulgaria:Scientific and Technical Union of Mining, Geology and Metallurgy (2012): 220-227