Претрага
796 items
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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... 100 AC1 1693 1193 827 90 ] —-=AC2 1084 1568 1081 T5756 3412 80 Š š V _Ml potential 1544 70 34197 |artefacts 993 2949 o 60 2914 < 2845 ~ ~ 50 4000 .A\R d "· 494 3500 3000 2500 2000 1500 1000 500 v/cm"! Fig 4. FT-IR spectra of activated carbons ACI and AC2. https://doi.org/10 ...
... 2000 1500 1000 500 v/cm1 b) 100 , —— HW500f untreated 90 X ——> HW500f treated with HCI 80 _ 3198 potential CO, 70 3194 Zi_šifgds j 2914 5 64 2845 s 1 2840 j 503 40 | j 30 _ 20j 7 10 - j 04 ——— ——— Đ | — -——= 4000 3500 3000 2500 2000 1500 1000 500 v/ cm"! Fig 5. FT-IR ...
... 2) 3675 30 | # i i 3) 3650 ~ 60 20% i 1) 3748 kii 2) 3675 101 „ 3) 3649 J 4000 3900 3890 3700 3600 3500 v/cm"1 0 — —— —— ————-{ii, ——— 4000 3500 3000 2500 2000 1500 1000 500 v/ cm" b) 100 4 0) 2)3)4) —— HW1100g untreated 90 —— HW1100g treated with HCI 80 70 1510 60 0000 3900 33@0/;3·3 ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations
Lutovac Suzana, Medenica Dragan, Gluščević Branko, Tokalić Rade, Beljić Čedomir. "Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations" in Energies no. Energies 2016, Vol 9, issue 8, 617, Basel, Switzerland:MDPI AG (2016). https://doi.org/doi:10.3390/en9080617
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Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem... the intramontane Žagubica Basin (Serbian Carpatho–Balkanides). N. Jb. Geol. Paläont. (Abh.) 256 (2), 141–150. Lesić, V., Márton, E., Gajić, V., Jovanović, D., Cvetkov, V., 2019. Clockwise vertical-axis rotation in the West Vardar zone of Serbia: tectonic implications. Swiss J. Geosci. 112, ...
... faulting: from early concepts to inverse methods. Tectonophysics 581, 206–219. Cembrano, J., González, G., Arancibia, G., Ahumada, I., Olivares, V., Herrera, V., 2005. Fault zone development and strain partitioning in an extensional strike-slip duplex: a case study from the Mesozoic Atacama fault system ...
... geothermal resources. Geothermics 53, 328–352. Iancu, V., Berza, T., Seghedi, A., Gheuca, I., Hann, H.-P., 2005a. Alpine polyphase tectono-metamorphic evolution of the South Carpathians: a new overview. Tectonophysics 410, 337–365. Iancu, V., Berza, T., Seghedi, A., Marunţiu, M., 2005b. Paleozoic ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides" in Global and Planetary Change, Elsevier BV (2022). https://doi.org/10.1016/j.gloplacha.2021.103714
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Prognozna ocena resursa kaolinitskih glina u sedimentnim basenima Srbije
Vladimir M. Simić (2003)Kaolinitske gline predstavljaju jednu od privredno najznačajnijih nemetaličnih mineralnih sirovina u Srbiji. Ležišta tih glina odavno se istražuju i eksploatišu u Aranđelovačkom i Kolubarskom basenu i basenima vlašićkog antiklinorijuma. Osim toga, u većem ili manjem obimu istražene su mnoge lokalnosti, a na nekima od njih vršila se povremena eksploatacija. Dosadašnja istraživanja kaolinitskih glina imala su, međutim, prevashodno uzak istraživački cilj - utvrđivanje rezervi glina određenog ležišta, dok su istraživanja regionalnog karaktera bila malog obima i vezana za delove pojedinih ...prognozna ocena, resursi kaolinitskih glina, sedimentni baseni, Srbija, geologija, mineralogija, kvalitet, potencijalnostVladimir M. Simić. Prognozna ocena resursa kaolinitskih glina u sedimentnim basenima Srbije, Beograd : V. Simić, 2003
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Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia
Dragoljub Bajić, Dušan Polomčić (2014)A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables... then V(M1 ≥ M2) =1. Since M1 and M2 are convex triangular fuzzy numbers, it fol- lows that: V(M1 ≥ M2) = 1 if s1 ≥ s2 where c is the ordinate of the highest intersection at point C between the membership functions To compare the triangular fuzzy numbers M1 and M2, both values, V(M1 ≥ M2) and V(M2 ≥ ...
... Water quality management of a stretch of river Yamuna: aninteractive fuzzy multi-objective approach. Water Resource Mana- gement, 21: 515–532. UDDAMERI V., HERNANDEZ, A.E. & ESTRADA, F. (2014). A fuzzy simulation-optimization approach for optimal esti- mation of groundwater availability under decision ...Dragoljub Bajić, Dušan Polomčić. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia" in Geološki anali Balkanskoga poluostrva, Belgrade : University of Belgrade - Faculty of mining and geology (2014). https://doi.org/10.2298/GABP1475103B
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Метода променљивих околина за решавање проблема p-центра са поузданом мрежом
У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...Јована Рађеновић, Стефан Мишковић, Оливера Станчић. "Метода променљивих околина за решавање проблема p-центра са поузданом мрежом" in 50. Међународни симпозијум о операционим истраживањима SYM-OP-IS, Тара, Србија, 18-21.9.2023, Београд : Медија центар „Одбрана” (2023)
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Речник САНУ као база терминолошких речника (на примеру речника кулинарства)
... Stanojević, M. (2012). The Serbian Language in the Digital Age. Berlin; Springer-Verlag. 3. Kilgarriff, A., Baisa, V., Bušta, J., Jakubíček, M., Kovář, V., Michelfeit, J., Rychlý, P., Suchomel, V. (2014). The Sketch Engine: ten years on. Lexicography 1(1), pp.7–36. 4. Dunning, T. (1993). Accurate methods ...
... и употреба неке лексеме. При дефинисању неке зачинске биљке, поред осталог увек стоји „која се употребљава као зачин“, „која служи као зачин“ и сл. (в. мајоран, мирођија). Посуђе или прибор за јело дефинишу се са „део стоног прибора“ (кашика, пирун, ложица), „суд/посуда за (кување, пржење и др.)“ (лонац ...
... кромпири постану меки, — онда је ђувеч готов (Влад. Т. 1, 73). Ђувеч се највише готови у јесен од дебелог овчег меса са патлиџанима и пиринчем (Ник. В. 2, 109). Примери обележених и необележених речи из Речника САНУ Процес припреме и обраде корпуса Процес екстракције и лематизације термина ...Рада Стијовић, Олга Сабо, Ранка Станковић. "Речник САНУ као база терминолошких речника (на примеру речника кулинарства)" in Словенска терминологија данас, Београд : Српска академија наука и уметности (2017)
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Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)
Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović. "Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)" in Physics and Chemistry of Minerals, Springer Science and Business Media LLC (2014). https://doi.org/10.1007/s00269-014-0693-x
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Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia
Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović. "Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia" in Progress in Landslide Research and Technology, Volume 3, Issue 1, Springer Cham. (2024). https://doi.org/https://doi.org/10.1007/978-3-031-55120-8_22
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Numeričko modelovanje povećanja iskorišćenja naftnih ležišta injektiranjem polimera i analiza osetljivosti parametara
Jana Šujica (2024)U toku proizvodnje jednog ležišta, nakon primene sekundarnih metoda iskorišćenja, velika količina nafte ostaje zarobljena u ležištu. Ovaj “problem” rešava se upotrebom tercijarnih metoda iskorišćenja.Tercijarne metode mogu se podeliti na: hemijske, termičke, mikrobiološke i metode utiskivanja gasova u uslovima mešanja i nemešanja.U ovom radu analiziraju se hemijske metode koje se odnose na injektiranje polimera u cilju povećanja iskorišćenja naftnog ležišta “X”. Simulacija je rađena u simulatoru “Tnavigator” na sintetičkom modelu u cilju definisanja stepena iskorišćenja naftnog ležišta “X” nakon ...... with the Eclipse Reservoir Simulator; [5] Karović-Maričić V., 2023, Materijal sa predavanja, Metode povećanja iskorišćenja naftnih ležišta, Hemijske i mikrobiološke metode, Rudarsko-geološki fakultet, Beograd [6] Karović-Maričić V., 2022, Materijal sa predavanja, Osnove numeričke simulacije ...
... kumulativnu proizvodnju nafte, koji se nalaze u tabeli 3.6.7. Tabela 3.6.1. Kumulativna proizvodnja nafte KUMULATIVNA PROIZVODNJA FAKTOR SCENARIO v NAFTE (10*%, sm3 ) ISKORIŠĆENJA, % scenario 1 473,2 13,6 scenario 2 475.8 13,7 scenario 3 497,6 14,45 Analizom kumulativne proizvodnje uočeno ...
... yCTaHOBa; • a cy pe3ynTaTH KOpečKTHO HaBčeJIČHH H p • a HHCaM KpimHo/Ha ayTOpcKa npaBa H KOpHcTHO/HŽa BHTeJIeKTyaJIHy CBOJHHy JpyrHx. JHua. 'V Beorpany, O6pasay 2 H3JABA O HCTOBETHOCTH IIITAMIIAHE H EJIEKKTPOHCKE BEP3HJE 3ABPIIHOT PAJIA r HMe (HMe poj\iTeJba) H Iipe3HMC CTyJlčHTa ...Jana Šujica. Numeričko modelovanje povećanja iskorišćenja naftnih ležišta injektiranjem polimera i analiza osetljivosti parametara, 2024
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Assessments of effects of implementation of strategic plans for development of Belgrade District heating system
The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić. "Assessments of effects of implementation of strategic plans for development of Belgrade District heating system" in Sustainable Cities and Society, Elsevier BV (2020). https://doi.org/10.1016/j.scs.2020.102304
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Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)
Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad. "Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)" in Historical Biology (2023). https://doi.org/10.1080/08912963.2022.2122823
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Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)
Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović. "Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)" in Materials, MDPI AG (2024). https://doi.org/10.3390/ma17040820
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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
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Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
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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
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Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides
Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis... Bortolotti, V., Chiari, M., Marroni, M., Pandolfi, L., Principi, G., & Saccani, E. (2013). Geodynamic evolution of ophiolites from Albania and Greece (Dinaric-Hellenic belt): One, two, or more oceanic basins? /nternational Journal of Earth Sciences, 102(3), 783—811. Bortolotti, V., Kodra, A ...
... 13-139. Milovanovic, D., Marchig, V., and Stevan, K., 1995, Petrology of the crossite schist from Fruška Gora Mts (Yugoslavia), relic of a subducted slab of the Tethyan oceanic crust: Jouwrmal of Geodynamics, 20, 3, 289-304. Mladenovic, A., Trivic, B., Cvetkovic, V., and Pavlovic, R., A brittle ...
... Keywords Internal Dinarides · Drina-Ivanjica thrust sheet · Deformation history · K-Ar dating · Obduction · Structural analysis Editorial handling: V. Cvetkovic. Institute for Nuclear Research of the Hungarian Academy of Kristof Porkolab Sciences, 18/c Bem tćr, Debrecen 4026, Hungary k.porkolabuu ...Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor. "Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides" in Swiss Journal of Geosciences (2019)
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Petrofizička svojstva krečnjaka postamenta spomenika „Pobednik” na Beogradskoj tvrđavi
Dijana Trajković (2024)Spomenik „Pobednik” je podignut 1928. godine na Gornjem gradu Beogradske tvrđave. Spomenik je predstavljen bronzanom muškom figurom sa orlom u desnoj ruci i spuštenim mačem u levoj ruci i delo je vajara Ivana Meštrovića, dok je postament delo arhitekte Petra Bajalovića. Postament je u vidu dorskog stuba sa kanelurama na visokoj kubičnoj bazi i izgrađen je od krečnjaka o čijem poreklu ne postoje zvanični literaturni podaci, ali u korelaciji sa ostalim objektima Beogradske tvrđave, pretpostavlja se da je za ...... Matović, V., Gajić, V., Vasić, N., 2019. Metode ispitivanja sedimentnih stena. Univerzitet u Beogradu, Rudarsko – Geološki fakultet., str. 237- 241 Novaković, N., 2019. IDP — Idejni projekat rekonstrukcije i restauracije, Zavod za zaštitu spomenika kulture grada Beograda. Čubrilović, V. (ur.), ...
... SBIOJ 0U2O1 PODIJ 9 J O bUODI PBna(j SPJ3} 0221 PAILJ sl umfiAnjoc _ umfianjoad |___y PNMOD e{t00] *um[TAn[V | - de POBIEJS B[108} *UIm[iAn|V gpuodorl 000S0Pć 000S0Pć 00000FZ. 00000F/A . j 000S6tEZL. 000S6t2 000000S |I e = P -- = [1 .” Slika 2.4 - ...
... kasnoantičkog utvrđenja, kao i kamen sa severnih padina Kosmaja. Na to je ukazao način gradnje zapažen na Jednom delu severoistočnog bedema između kula V i VI, koji je uočen i kod manastirskih kompleksa iz XV veka na Kosmaju (Popović, 2006). U kasnijim fazama izgradnje tvrđave, nakon 1740. godine, korišćen ...Dijana Trajković. Petrofizička svojstva krečnjaka postamenta spomenika „Pobednik” na Beogradskoj tvrđavi, 2024
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Specifičnosti fundiranja u lesnim naslagama – objekat Poreska uprava Zemun
Anja Dević (2024)U ovom završnom radu prikazani su literaturni podaci koji se odnose na geotehničke karakteristike terena izgrađenih od lesa na primeru šireg istražnog prostora, tzv. Zemunskog lesnog platoa, kao i rezultati detaljnih geotehničkih istraživanja na lokaciji objekta Poreske uprave Zemun. U prvom delu rada prikazani su uslovi nastanka karakteristične makroporozne strukture lesa i njen uticaj na fizičko-mehaničke karakteristike i stabilnost terena izgrađenih od lesa. Na osnovu analize i interpretacije rezultata detaljnih geotehničkih istraživanja na lokaciji objekta Poreske uprave Zemun prikazane su ...... %,w= 15—0 % , Sr = 45—70 % odnosno, fazni sastav: s = 45–55 % , v=20-35 % ,a= 15—30 % – u izdanskoj zoni: y = 16.5-20.5 kN/ m?, ya=10-18.5 kN/ mš, n = 35-50% , w = 18-30% , Sr = 60-100% odnosno, fazni sastav: s = 50-65% , v = 35-50% , a=0-15% Poremećaj odnosa čvrste, tečne ı gasovite komponente ...
... razliku u granulometrijskom sastavu lesa gornje - nadizdanske, i donje – izdanske zone lesa. Fazni sastav – zapreminski odnos čvrste (s), tečne (v) i gasovite komponente (a) se neposredno odražava na zapreminskoj težini, poroznosti, vlažnosti tJ. zasićenosti. Ispitivanjima reprezentativnih uzoraka ...
... og sastava, u pogledu konsistencije jasno se izdvaja područje lesa nadizdanske zone (I, II II horizont lesa), od lesa stalne izdanske zone (IV ı V horizont). Granica tečenja lesa nadizdanske zone wi = 30 do 40 % , indeks plastičnosti Ip = 10 do 18 %, granica plastičnosti PL = 20 %, a koloidalna ...Anja Dević. Specifičnosti fundiranja u lesnim naslagama – objekat Poreska uprava Zemun, 2024
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OER obrazovni sadržaji kao spona između akademskog i preduzetničkog znanja
... znanja | Ivan Obradović, Ranka Stanković, Marija Radojičić | The fifth Symposium Mathematics and Applications 2014,17-18 October 2014, Belgrade | 2014 | V | 1 http://dr.rgf.bg.ac.rs/s/repo/item/0001600 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава приступ издањима ...
... . - The Repository is available at: www.dr.rgf.bg.ac.rs Simpozijum MATEMATIKA I PRIMENE, Matematički fakultet, Univerzitet u Beogradu, 2014, Vol. V(1) OER obrazovni sadržaji kao spona između akademskog i preduzetničkog znanja Ivan Obradović Univerzitet u Beogradu, Rudarsko-geološki fakultet ...
... 59(37), 2013, A4. [17] D. Wiley. Open source, openness, end higher education. Innovative Journal of Online Education,3(1), 2006. [18] Ž. Papić, V. Aleksić. Metodika nastave tehničkog i informatičkog obrazovanja. Tehnički fakultet Čačak. 2012, 84.. [19] N. Trnavac, J. Đorđević. Pedagogija. Beograd: ...Ivan Obradović, Ranka Stanković, Marija Radojičić. "OER obrazovni sadržaji kao spona između akademskog i preduzetničkog znanja" in The fifth Symposium Mathematics and Applications 2014,17-18 October 2014, Belgrade V no. 1, Beograd : Matematički fakultet Univerziteta u Beogradu (2014)