Претрага
847 items
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Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu
Marija D. Prekajski (2014)Marija D. Prekajski. Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu, Beograd:Rudarsko Geološki Fakultet, 2014
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Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu
Marija D. Prekajski (2014-04-04)Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 ...nanostrukturni materijali, čvrsti rastvori, CeO2, Bi2O3, rendgenskadifraktometrija praha, Ritveldova metoda, mikrostrukrurna analizaMarija D. Prekajski. "Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-04-04)
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Ionic conductivity in single-crystal LiAISi2O6: influece of structure on lithium Mobility
Welsch Ana-Maria, Murawski Dawid, Prekajski Marija, Vulić Predrag, Kremenović Aleksandar. "Ionic conductivity in single-crystal LiAISi2O6: influece of structure on lithium Mobility" in Physics and Chemistry of Minerals 42 no. 5, :Springer (2015): 413-420. https://doi.org/10.1007/s00269-015-0732-2
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Influence of size/crystallinity effects on the cation ordering and magnetism of alpha-lithium ferrite nanoparticles
Jović Nataša, Prekajski Marija, Kremenović Aleksandar, Jancar Bostjan, Kahlenberg Volker, Antić Bratislav (2012)Jović Nataša, Prekajski Marija, Kremenović Aleksandar, Jancar Bostjan, Kahlenberg Volker, Antić Bratislav. "Influence of size/crystallinity effects on the cation ordering and magnetism of alpha-lithium ferrite nanoparticles" in Journal of Applied Physics 3 no. 111, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA:American Institute Physics (2012). https://doi.org/10.1063/1.3684554
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Flux grown β- and γ-spodumene single crystals
Prekajski Marija, Kremenović Aleksandar, Vulić Predrag, Welsch Anna-Maria, Murawski Dawid, Behrens Harald (2012)Prekajski Marija, Kremenović Aleksandar, Vulić Predrag, Welsch Anna-Maria, Murawski Dawid, Behrens Harald. "Flux grown β- and γ-spodumene single crystals" in XIX Conference of the Serbian Crystallographic Society-Abstracts, Bela Crkva, Srbija:Srpsko kristalografsko društvo (2012): 86-87
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Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation
Pantić Jelena, Prekajski Marija, Dramićanin Miroslav, Abazović Nadica, Vuković Nikola, Kremenović Aleksandar, Matović Branko (2013)Pantić Jelena, Prekajski Marija, Dramićanin Miroslav, Abazović Nadica, Vuković Nikola, Kremenović Aleksandar, Matović Branko. "Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation" in Journal of Alloys and Compounds 579, :Elsevier B.V. (2013): 290-294
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Nanocrystaline solid solution CeO 2-Bi 2O 3
Prekajski Marija, Dohcevic-Mitrović Zorana, Radović Marko, Babić Biljana, Pantić Jelena, Kremenović Aleksandar, Matović Branko (2012)Prekajski Marija, Dohcevic-Mitrović Zorana, Radović Marko, Babić Biljana, Pantić Jelena, Kremenović Aleksandar, Matović Branko. "Nanocrystaline solid solution CeO 2-Bi 2O 3" in Journal of the European Ceramic Society 9 no. 32, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND:Elsevier Sci Ltd (2012): 1983-1987. https://doi.org/10.1016/j.jeurceramsoc.2011.12
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Thermal stability of Ce1-xBixO2-delta (x = 0.1-0.5) solid solution
Prekajski Marija, Fruth Viktor, Andronescu Cristian, Trandafilovic Lidija V., Pantić Jelena, Kremenović Aleksandar, Matović Branko (2013)Prekajski Marija, Fruth Viktor, Andronescu Cristian, Trandafilovic Lidija V., Pantić Jelena, Kremenović Aleksandar, Matović Branko. "Thermal stability of Ce1-xBixO2-delta (x = 0.1-0.5) solid solution" in Journal of Alloys and Compounds no. 578, PO BOX 564, 1001 LAUSANNE, SWITZERLAND:Elesevier Science Inc (2013): 26-31. https://doi.org/10.1016/jjallcom.2013.05.006
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Синтеза и карактеризација керамике на бази сфена
Jelena R. Pantić (2015-07-10)Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори... Ceram 5: 79-84. Pantić J., Kremenović A., Došen A., Prekajski M., Stanković N., Baščarević Z., Matović B. (2013) Influence of mechanical activation on sphene based ceramic material synthesis. Ceram Inter 39: 1483-1488. Pantić J., Prekajski M., Dramićanin М., Abazović N., Vuković N., Kremenović ...
... (М21) 1. Pantić, Ј.; Kremenović А.; Došen, A.; Prekajski, M.; Stanković, N.; Baščarević, Z.; Matović, B.: „Influence of mechanical activation on sphene based ceramic material synthesis”, Ceram Int 39 [1] (2013) 483-488. 2. Pantić, J.; Prekajski, M.; Dramićanin, M.; Abazović, N.; Vuković, N.; ...
... Миховилу Логару и Николи Вуковићу. Желим да се захвалим својим колегама из Лаборатије за материјале за пружену помоћ и подршку, а посебно др Марији Прекајски, др Ањи Дошен и др Весни Максимовић које су учествовале у изради овог доктората. Такође, захвалницу дугујем и др Мирославу Драмићанину, директору ...Jelena R. Pantić. "Синтеза и карактеризација керамике на бази сфена" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-10)
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Синтеза и карактеризација керамике на бази сфена
Jelena R. Pantić (2015-07-10)Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори... Ceram 5: 79-84. Pantić J., Kremenović A., Došen A., Prekajski M., Stanković N., Baščarević Z., Matović B. (2013) Influence of mechanical activation on sphene based ceramic material synthesis. Ceram Inter 39: 1483-1488. Pantić J., Prekajski M., Dramićanin М., Abazović N., Vuković N., Kremenović ...
... (М21) 1. Pantić, Ј.; Kremenović А.; Došen, A.; Prekajski, M.; Stanković, N.; Baščarević, Z.; Matović, B.: „Influence of mechanical activation on sphene based ceramic material synthesis”, Ceram Int 39 [1] (2013) 483-488. 2. Pantić, J.; Prekajski, M.; Dramićanin, M.; Abazović, N.; Vuković, N.; ...
... Миховилу Логару и Николи Вуковићу. Желим да се захвалим својим колегама из Лаборатије за материјале за пружену помоћ и подршку, а посебно др Марији Прекајски, др Ањи Дошен и др Весни Максимовић које су учествовале у изради овог доктората. Такође, захвалницу дугујем и др Мирославу Драмићанину, директору ...Jelena R. Pantić. "Синтеза и карактеризација керамике на бази сфена" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-10)
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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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The external aggregation Newton's method for solving nonlinear equations and applications
Marija Paunović, Dejan Ćebić, Nebojša Ralević. "The external aggregation Newton's method for solving nonlinear equations and applications" in The University Thought - Publication in Natural Sciences, Centre for Evaluation in Education and Science (CEON/CEES) (2020). https://doi.org/10.5937/univtho10-24982
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Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability
Marija Živković, Dejan Ivezić (2021)Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија... ivezic@rgf.bg.ac.rs Marija Živković marija.zivkovic@rgf.bg.ac.rs 1 University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia http://orcid.org/0000-0003-2659-0662 http://crossmark.crossref.org/dialog/?doi=10.1007/s10098-021-02063-6&domain=pdf M. Živković, D. Ivezić 1 3 Graphic ...
... in Serbia: effects on sustainability Marija Živković, Dejan Ivezić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability | Marija Živković, Dejan Ivezić | Clean Technologies ...
... org/10.1007/s10098-021-02063-6 ORIGINAL PAPER Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability Marija Živković1 · Dejan Ivezić1 Received: 3 November 2020 / Accepted: 26 February 2021 © The Author(s), under exclusive licence to Springer-Verlag GmbH ...Marija Živković, Dejan Ivezić. "Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability" in Clean Technologies and Environmental Policy, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10098-021-02063-6
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A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia
When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...... Assume that: d′(Ai) = minV (Si ≥ Sk) (10) for k = 1,2, . . .n; k̸=i. Then the weight vector is given by: W ′(d′(A1), d ′(A2), . . . , d ′(Am)) T (11) where (Ai = 1,2, . . . , n) are n elements. Via normalization, the normalized weight vectors are (Chang, 1996): W (d(A1), d(A2), . . . , d(An)) T (12) ...
... Pavlović, Dejan Ivezić, Marija Živković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia | Boban Pavlović, Dejan Ivezić, Marija Živković | Energy ...
... ordinate of the highest intersection point D be- tween µM1 and µM2(Fig. 5). When M1= (l1, m1, u1) and M2= (l2, m2, u2), the ordinate d is given by next equation: V (M2 ≥ M1) = hgt(M1 ∩ M2) = µM2 (d) (8) µM2 (d)= ⎧ ⎪ ⎨ ⎪ ⎩ 1, if m2 ≥ m1 0, if l1 ≥ u2 l1−u2 (m2−u2)−(m1−l1) otherwise To compare ...Boban Pavlović, Dejan Ivezić, Marija Živković. "A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia" in Energy Reports, Elsevier BV (2021). https://doi.org/10.1016/j.egyr.2021.02.072
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State and perspective of individual household heating in Serbia: A survey-based study
This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...Boban Pavlović, Dejan Ivezić, Marija Živković. "State and perspective of individual household heating in Serbia: A survey-based study" in Energy and Buildings, Elsevier BV (2021). https://doi.org/10.1016/j.enbuild.2021.111128
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Long-Term Planning Methodology for Improving Wood Biomass utilization
Vukašinović V., Gordić D., Živković Marija, Končalović D., Živković D.. "Long-Term Planning Methodology for Improving Wood Biomass utilization" in 3rd South East European conference on sustainable development of energy, water and environment systems (2018): 66
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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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Primena backcasting metodologije pri dugoročnom planiranju korišćenja biomase
Vukašinović V., Gordić D., Živković Marija, Živković D., Josijević M., Jurišević N.. "Primena backcasting metodologije pri dugoročnom planiranju korišćenja biomase" in Energija 20 no. 01-Feb (2018): 563-571
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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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Long-term planning methodology for improving wood biomass utilization
The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković. "Long-term planning methodology for improving wood biomass utilization" in Energy, Elsevier BV (2019). https://doi.org/10.1016/j.energy.2019.03.105