Претрага
2186 items
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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... IVEZIĆ D., 2011: Serbian Energy Development Based on Lignite Production. Energy Policy, Vol. 39, No. 2, pp. 1191–1199. IVEZIĆ D., ĐAJIĆ N., ŽIVKOVIĆ M., 2013: Potential and Barriers to Renewable Energy Sources in Serbia. Energy Sources, Part B: Economics, Planning, and Policy, Vol. 8, No. 2, pp. 162–170 ...
... 5th International Scientific Conference on Energy and Climate Change, 192–199, Atina, Grčka. IVEZIĆ D., ĐAJIĆ N., ŽIVKOVIĆ M., 2013: Potential and Barriers to Renewable Energy Sources in Serbia. Energy Sources, Part B: Economics, Planning, and Policy, Vol. 8, No. 2, pp. 162–170. GRUJIĆ M, IVEZIĆ ...
... Paratethys): new constraints from magneto- and biostratigraphy, Global and Planetary Change, 2013. 252. Ivezić D., Đajić N., Živković M.: The Potential of and Barriers to Renewable Energy Sources in Serbia, Energy Sources Part Beconomics Planning and Policy, 2013. 253. Gaudenyi T., Nenadić D., J ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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Koncept prediktivnog održavanja 4.0 (PdM) u energetici – konekcija sa budućom primenom Industrije 5.0
Četvrtu industrijsku revoluciju - Industrija 4.0 karakteriše upotreba cyber-fizičkih sistema. Da bi se postigla optimalna strategija održavanja (ali i proizvodnje), neophodno je razviti sisteme koji podržavaju napredne inteligentne sisteme održavanja ili tehnologije pametnog održavanja. Iz toga su proizašli postulati Prediktivnog održavanja 4.0 koji definišu veoma blisku budućnost u oblasti održavanja tehničkih sistema. Prediktivno održavanje 4.0 uključuje iskorišćenje snage veštačke inteligencije za stvaranje stalnog uvida u otkrivanje uzroka i anomalija u radu opreme, koje se ne otkrivaju kognitivnim moćima. Drugim ...Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Miloš Tanasijević, Filip Miletić. "Koncept prediktivnog održavanja 4.0 (PdM) u energetici – konekcija sa budućom primenom Industrije 5.0" in Energija, ekonomija, ekologija, Savez energetičara (2022). https://doi.org/ 10.46793/EEE22-2.54J
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Flyrock induced by blasting in surface mining
Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac (2022)Miniranje predstavlja i dalje najefikasniji i najjeftiniji način eksploatacije velikih količina čvrstih mineralnih sirovina na površinskim kopovima. Energija eksplozije se koristi za fragmentaciju čvrste stenske mase do zahtevane granulacije. Pored pozitivnih efekata miniranja, postoje i određeni neželjeni efekti svakog procesa miniranja koji se mogu javiti, a to su: potresi tla, razletanje komada stene, vazdušni udari, otrovni i zagušljivi gasovi i prašina. Razletanje komada stene je nekontrolisano izbacivanje fragmenata odminirane stenske mase i predstavlja jedan od glavnih izvora materijalne štete ...Milanka Negovanović, Lazar Kričak, Snežana Ignjatović, Stefan Milanović, Jovan Marković, Nikola Simić, Rade Šarac. "Flyrock induced by blasting in surface mining" in Rudarski glasnik, Beograd : Rudarski institut (2022). https://doi.org/10.25075/BM.2022.05
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Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma
... 2005;26:3Y8. 2. Roti E, Rossi R, Trasforini G, et al. Clinical and histological characteristics of papillary thyroid microcarcinoma: results of a retrospective study in 243 pa- tients. J Clin Endocrinol Metab. 2006;91:2171Y2178. 3. Chow SM, Law SC, Chan JK, et al. Papillary microcarcinoma of the thyroid: ...
... frequency, pattern of occurrence, and optimal strategy for neck dissection. Ann Surg. 2003;237:399Y407. 30. Wu AW, Nguyen C, Wang MB. What is the best treatment for papillary thyroid microcarcinoma? Laryngoscope. 2011;121:1828Y1829. 31. IAEA-International Atomic Energy Agency. Nuclear Medicine in Thyroid ...
... 17 Pellegriti et al,27 and Ito et al28 found a similar prevalence of multifocal tumor foci and lymph node metastases (12.1% and 13.4%, 31.8% and 30.1%, and 42.8% and 47.9%, respec- tively). Ito et al reported more than 40% of patients who presented with lymph node metastases and multiple tumor foci.2 ...Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković. "Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma" in Clinical Nuclear Medicine, Lippincott Williams & Wilkins (2013). https://doi.org/10.1097/RLU.0b013e3182872ed2
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Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides
... occurs on the high-energy sorption centers at lower pesticide concentrations (specific adsorption), and low-energy sorption centers at higher pesticide concentrations (non-specific adsorption). In the case of montmorillonites modified both by the HDTMA and PTMA complexes, ...
... Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Call for contributions Clean water and sanitation & Life on land Linking soil mineralogy to soil properties and functions ...
... Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization ...Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević. "Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides" in Eurosoil2020, online event 2021, Eurosoil, Frontiers Abstract Book (2021)
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Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements
The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović. "Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements" in Advances in Engineering Software, Elsevier BV (2020). https://doi.org/10.1016/j.advengsoft.2020.102824
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Economic And Technical Aspects Of Transformer Operation
Aleksandrović Snežana, Jović Mihajlo (2016)Aleksandrović Snežana, Jović Mihajlo. "Economic And Technical Aspects Of Transformer Operation" in Energy Sources, Part B: Economics, Planning and Policy 11 no. 1, United Kingdom:Taylor & Francis (2016): 26-31. https://doi.org/10.1080/15567249.2011.567225
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Knowledge and Rule-Based Diacritic Restoration in Serbian
In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).... comprising lexical items and terms from the sociopolitical domain. The sociopolitical domain is a broad domain describing everyday life of modern society and uniting many professionals domains, such as politics, law, economy, international relations, finances, mil- itary affairs, arts, and others. Terms of ...
... the highlighted concept. Fig. 1 shows the relation of Import dependence concept with such concepts as Economy dependence, Energy dependence, Import substitution, Imported goods, and Import. The lower right form shows text entries for a related concept. The low right form of Fig. 1 describes text entries ...
... because scientific and technological problems can be discussed together with political, economical, indus- trial, and other issues (Dobrov and Loukachevitch, 2006); • Security Thesaurus is an extension of the RuThes thesaurus and includes terminology related to social, national and religious conflicts ...Cvetana Krstev, Ranka Stanković, Duško Vitas. "Knowledge and Rule-Based Diacritic Restoration in Serbian" in Proceedings of the Third International Conference Computational Linguistics in Bulgaria (CLIB 2018), May 27-29, 2018, Sofia, Bulgaria, Sofia : The Institute for Bulgarian Language Prof. Lyubomir Andreychin, Bulgarian Academy of Sciences (2018): 41-51
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Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process
Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker... Figure 6. Transformed Kubelka-Munk functions (F(R) hv)Ž and (F(R) hv)1/? assuming,direct and indirect energy bandgap in the V»Os sample, respectively. It should be noted that different V)»Os structures may undergo direct and indirect transitions, and it is not often easy to decide which type of electron ...
... (MET, NAD, and PIN) separately and in a mixture. Several methods of characterization, such as X-ray powder diffraction (KRPD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET) measurements, Fourier transform infrared (FTIR) and Raman sp ...
... A—proportional con- stant, and the n factor depends on the nature of the electron transition. They equal 1/2 or 2 for allowed direct and indirect transition band gaps [36]. The band gap values were deduced by extrapolating the linear portion of the curves to the energy axis, as shown in Figure ...Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković. "Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process" in Molecules, MDPI AG (2023). https://doi.org/10.3390/molecules28020655
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Vebran Web Services for Corpus Query Expansion
Ranka Stanković, Miloš Utvić (2020)U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.... Belgrade and the Language Resources and Technologies Society (JeRTeh): – monolingual general corpora: Corpus of Contemporary Serbian (versions SrpKor2003 and SrpKor2013)1 and its subset SrpLemKor2; – SrpEngKor3, aligned English-Serbian corpus including subcorpus SELFEH (Serbian-English Law Finance Education ...
... Systematic collection and preparation of texts from the mining domain started with English-Serbian alignment of articles in a bilingual journal “Podzemni radovi”, followed by mining projects, law regulations, PhD theses and textbooks from the mining domain. Texts are gathered and organized in the ROmeka@RGF ...
... Education and Health) with documents on finance, health, law and education; – SrpFranKor4, aligned French-Serbian corpus; – SrpNemKor5, aligned German-Serbian corpus; – RudKor6, a specialized monolingual corpus of texts from the mining domain, etc. The query expansion will be demonstrated using examples ...Ranka Stanković, Miloš Utvić. "Vebran Web Services for Corpus Query Expansion" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.5
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Risk management in coal mining
Miljanović Igor, Milutinović Aleksandar, Tokalić Rade. "Risk management in coal mining" in Proceedings, 2nd Virtual International Conference on Science, Technology and Management in Energy, Niš:Research and Development Center “ALFATEC”, Niš, Serbia, and Complex System Research Centre (2016): 89-96
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Conditions for efficiency of open pit medium voltage power transformers
Aleksandrović Snežana (2017)Aleksandrović Snežana. "Conditions for efficiency of open pit medium voltage power transformers" in 3rd Virtual International Conference on Science, Technology and Management in Energy no. 3, Niš, Serbia:Research and Development Center “ALFATEC” (2017): 77-81
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Hydrodynamic Model of The Open-Pit Mine “Buvač” (Republic of Srpska, Bosnia And Herzegovina)
Bajić Dragoljub, Polomčić Dušan, Papić Petar, Stojković Jana. "Hydrodynamic Model of The Open-Pit Mine “Buvač” (Republic of Srpska, Bosnia And Herzegovina)" in CD Proceedings of 6th Dubrovnik Conference on Sustainable Development of Energy Water and Environmental Systems,, Dubrovnik: (2011): 25-29
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Groundwater balance, natural recharge and drainage zones at open pit mine „Polje E“ of Kolubara Coal Basin (Republic of Serbia)
Polomčić Dušan, Bajić Dragoljub, Ristić-Vakanjac Vesna. "Groundwater balance, natural recharge and drainage zones at open pit mine „Polje E“ of Kolubara Coal Basin (Republic of Serbia)" in CD Proceedings of 7th Conference on Sustainable Development of Energy Water and Environmental Systems, Ohrid: (2012): 236-237
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Significance of dependability concept for electricity security of supply
Tanasijević Miloš, Ivezić Dejan, Jovančić Predrag, Madžarević Aleksandar. "Significance of dependability concept for electricity security of supply" in 6th International Scientific Conference on Energy and Climate Change 1, Athens, Greece:National and Kapodistrian University of Athens (2013): 113-120
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Ni–Sn coatings as cathodes for hydrogen evolution in alkaline solution. Chemical composition, phase composition and morphology effects
Jović Vladimir, Lačnjevac Uroš, Jović Borka, Karanović Ljiljana, Krstajić Nedeljko.. "Ni–Sn coatings as cathodes for hydrogen evolution in alkaline solution. Chemical composition, phase composition and morphology effects" in International journal of hydrogen energy 37 no. 23, Radarweg 29; Amsterdam, 1043 NX; Netherlands:Elsevier BV (2012): 17882-17891. https://doi.org/10.1016/j.ijhydene.2012.09.110
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Identification of a novel series of benzohopanes and its geochemical significance
Nytoft H. Peter, Vuković Nikola, Kildahl-Andersen Geir, Rise Frode, Životić Dragana, Stojanovic Ksenija (2016)Nytoft H. Peter, Vuković Nikola, Kildahl-Andersen Geir, Rise Frode, Životić Dragana, Stojanovic Ksenija. "Identification of a novel series of benzohopanes and its geochemical significance" in Energy & Fuels 30 no. 7, Washington:American Chemical Society (2016): 5563-5575. https://doi.org/10.1021/acs.energyfuels.6b0079
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Assessment of vulnerability of natural gas supply in Serbia: State and perspective
Madžarević Aleksandar, Ivezić Dejan, Živković Marija, Tanasijević Miloš, Ivić Milica. "Assessment of vulnerability of natural gas supply in Serbia: State and perspective" in Energy Policy 121, :Elsevier (2018): 415-425
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Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit
... potential energy of explosive transformes into mechanical work. In the near of the blasting point, that energy destroys and crushes the rock mass. At a slightly greater distance that energy creates cracks and permanent deformations in the rock mass while at an even greater distance that energy transformes ...
... of kilograms per a drillhol and blasting with dozens and even hundreds of tonnes of an explosive are being apllied in the world nowdays. Such large quantities of an explosive can cause seismic shocks with the intensity that can have hazardous impact on the environment and result in moving of buildings ...
... monitoring site r , reduced to the total quantity of the explosive Q i.e., R =%č. Parameters K and m are conditioned by } v characteristics of the rock mass and blasting conditions. Thus, V is a decreasing and convex function of the variable R. By applying the equation of rock mass oscillation while ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia, Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)... (63keV) and/or "Pa (1000 keV). The ecay products of ? Ra, _ Bi (609, 1120 and 1764keV) and "Pb (295 and 352 keV) were used for activity determination. The activity of 52 Th was calculated using its daughter product ŠAc (338 and 911 keV). K was determined from its single line of 1460 keV -energy. The ...
... recrystallized (purified) gypsum, insoluble residue and supernatant. Both raw phosphogypsum and recrystallized gypsum were examined using induct- ively coupled plasma optical emission spectrometry, X-ray diffraction and scanning electron microscopy with energy-dispersive spec- trometry. The activity conc ...
... Protection and Management of NORM Residues in the Phosphate Industry. Safety Reports Series No. 78. International Atomic Energy Agency, Vienna, Austria, 288 pp. Jalali J., Magdich S., Jarboui R., Loungou M. & Ammar E. (2016) Phosphogypsum biotransformation by aerobic bacterial flora and isolated ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11