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2186 items
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Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
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Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites
Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković. "Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites" in Science of Sintering (2023). https://doi.org/10.2298/SOS220512013S
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Primena novih tehnologija za prostorno pozicioniranje u podzemnoj eksploataciji
Milutinović Aleksandar, Ganić Aleksandar. "Primena novih tehnologija za prostorno pozicioniranje u podzemnoj eksploataciji" in Energetsko rudarstvo, nove tehnologije, održivi razvoj : zbornik radova = Energy Mining, New Technologies, Sustainable Development : proceedings / III međunarodni simpozijum Energetsko rudarstvo 2010, 08-11. Septembar, 2010, Banja Junaković, Apatin = 1, Beograd:Rudarsko-geološki fakultet, Beograd (2010): 312-319
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Management of Natural Gas Sector in Serbia
Karović-Maričić Vesna, Danilović Dušan, Ivezić Dejan. "Management of Natural Gas Sector in Serbia" in Focus on Energy Management 1, Hauppauge, New York, USA:Nova Science Publishers (2011): 107-130
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Exploring scenarios for more sustainable heating: The case of Niš
Živković Marija, Pereverza Kateryna, Pasichnyi Oleksii, Madžarević Aleksandar, Ivezić Dejan, Kordas Olga (2016)Živković Marija, Pereverza Kateryna, Pasichnyi Oleksii, Madžarević Aleksandar, Ivezić Dejan, Kordas Olga. "Exploring scenarios for more sustainable heating: The case of Niš" in Energy no. 115, :Elsevier (2016): 1758-1770. https://doi.org/http://dx.doi.org/10.1016/j.en
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Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001
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Primena GIS-a u upravljanju i administraciji istražnih i eksploatacionih odobrenja
Stanković Ranka, Kitanović Olivera, Branislav Trivić, Blagojević Branislav, Prodanović Jelena (2010)Stanković Ranka, Kitanović Olivera, Branislav Trivić, Blagojević Branislav, Prodanović Jelena. "Primena GIS-a u upravljanju i administraciji istražnih i eksploatacionih odobrenja" in 3rd International Symposium ENERGY MINING 2010, 08 - 11. September 2010., Banja Junakovic, Apatin, Serbia, :Univerzitet u Beogradu - Rudarsko-geološki fakultet (2010): 494-502
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Integrisanje alata za modeliranje ležišta u informacioni sistem za upravljanje kvalitetom uglja
Jovanović Mirjana, Tomašević Aleksandra, Stanković Ranka. "Integrisanje alata za modeliranje ležišta u informacioni sistem za upravljanje kvalitetom uglja" in 3rd International Symposium ENERGY MINING 2010, 08 - 11. September 2010., Banja Junakovic, Apatin, Serbia, :Univerzitet u Beogradu - Rudarsko-geološki fakultet (2010): 503-509
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Implementacija upravljanja kvalitetom uglja na površinskim kopovima EPS RB Kolubara
Kolonja Božo, Ignjatović Dragan, Knežević Dinko, Stanković Ranka. "Implementacija upravljanja kvalitetom uglja na površinskim kopovima EPS RB Kolubara" in Rudarstvo 2015, Beograd:Energetika Rudarstvo Srbija Balkan (2015): 9
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Application of multi-criteria decision-making model for choice of the optimal solution for meeting heat demand in the centralized supply system in Belgrade
Grujić Miodrag, Ivezić Dejan, Živković Marija. "Application of multi-criteria decision-making model for choice of the optimal solution for meeting heat demand in the centralized supply system in Belgrade" in Energy 67, Amsterdam:Elsevier (2014): 341-350. https://doi.org/10.1080/15567240903330434
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Use of the 3D laser scanning while controlling the geometry of elements of bucket wheel escavator
Milošević Dragan, Pantić Marko, Stojaković Miša, Ganić Aleksandar, Milutinović Aleksandar. "Use of the 3D laser scanning while controlling the geometry of elements of bucket wheel escavator" in Energetsko rudarstvo, nove tehnologije, održivi razvoj : zbornik radova = Energy Mining, New Technologies, Sustainable Development : proceedings / III međunarodni simpozijum Energetsko rudarstvo 2010, 08-11. Septembar, 2010, Banja Junaković, Apatin = 1, Beograd:Rudarsko-geološki fakultet, Beograd (2010): 304-311
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Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes
Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...... [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ complexes towards studied nucleophiles, a Linear Free Energy Relationship (LFER) was used. The relationship be- tween second-order rate constant, k2, and nucleophilicity con- stants of the nucleophiles (n0 Pt) is given by Eq. (2) while the values of logk2 and n0 Pt are ...
... 932 ± 4 [22] 1,1,4-Et3dien 21.2 ± 0.3 [22] 1,1,7,7-Me4dien 0.28 ± 0.53 [22] 1,1,7,7-Et4dien 8.0 � 10�4 [22] Fig. 6. Linear Free Energy Relationship of [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ com- plexes with different nucleophiles. A. Mijatović et al. / Inorganica Chimica Acta 383 (2012) 300–304 303 ...
... 21,22] and with the aim to contribute towards our previously publishedwork, we synthesized novel tridentate nitrogen-donor li- gands TLtBu = 2,6-bis[(1,3-di-tert-butylimidazolin-2-imino)methyl] pyridine and tpdm = terpyridinedimethane and the corresponding Pd(II) complexes, [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ ...Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić. "Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes" in Inorganica Chimica Acta, Elsevier BV (2011). https://doi.org/10.1016/j.ica.2011.11.031
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Efficiency and lifetime of medium voltage transformers
Snežana Aleksandrović, Vesna Damnjanović. "Efficiency and lifetime of medium voltage transformers" in XVI International Scientific – Professional Symposium, INFOTEH, Jahorina, 22. mart - 24. mart 2017., Istočno Sarajevo : Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu (2017)
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Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia
The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...Jelka Krušić , Biljana Abolmasov, Miloš Marjanović. "Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia" in Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-60706-7_25
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method... as build- ing material for road construction and other trafficked areas. The using of fly ash and slag as secondary materials for road construc- tions, saves huge amounts of standard building materials (stone, gravel, sand), which are non-renewable. Most of the research is based on an examination ...
... in the combustion process and other parts of non- combustible material. It falls through the latticed stokehole and is rapidly cooled and extinguished in water. The fly ash and slag landfills in Serbia occupy an area of 1639 ha and if they are under constant control and monitoring, significantly ...
... the Kostolac basin is also of Upper Miocene (Pontian) age and hosts five coal seams, namely Seam III (the oldest and deepest) and Seams II-a, II, I-a and I. Only coal seams III, II and I are (or have been) explored in the Drmno, Ćirikovac and Klenovnik open pits. The average thickness of coal Seam ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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Influence of DEM resolution on numerical modelling of debris flows in RAMMS - Selanac case study
Debris flows induced by intensive rainfall represent very hazardous phenomena in many parts of the World. Methods for prediction of runout distance of flow like mass movements are different and depending on the input data, rheology, and available or appropriate numerical solution. However, sometimes it is not easy to obtain pre event and post event high-resolution data in the rural or mountainous area. Thus, the topology of terrain is the most important input parameter for the every real case ...... models are independent from local conditions, since such models implement physical principles, like the conservation of mass, momentum and energy of bulk mixtures (Rickenmann, 2005). In this paper, results of RAMMS debris-flow dynamical method are tested, based on Voellmy (1955) approach, which was ...
... Federal Institute for Forest, Snow and Landscape Research (WSL, Birmensdorf) and the Swiss Federal Institute for Snow and Avalanche Research (SLF, Davos). The mass balance equation incorporates the field variables flow height H (x, y,t) and flow velocity U (x, y,t) and is given by: 𝑄(𝑥, 𝑦, ...
... source zone (30m), and length of about 1.5km. First results were made using 30x30m DEM as input, and another with much more precise 5x5m DEM. New UAV scanning of post event topology was obtained in 2017 and additionally had helped in defining precise dimension of release, erosion and deposition zones ...Jelka Krušić, Biljana Abolmasov, Mileva Samardžić Petrović. "Influence of DEM resolution on numerical modelling of debris flows in RAMMS - Selanac case study" in 4th Regional Symposium on Landslides in the Adriatic Balkan Region, 23-25 October 2019, Sarajevo, Bosnia and Herzegovina, Geotechnical Society of Bosnia and Herzegovina (2019). https://doi.org/ 10.35123/ReSyLAB_2019
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Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)
M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić. "Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)" in International Journal of Coal Geology, Elsevier BV (2020). https://doi.org/10.1016/j.coal.2020.103411
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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 ...... projects TR 33039, TR 35040 and TR 33025. Acknowledgments: This paper was realized as a part of the projects: “Improvement of Lignite Open cast Technology in Order to Increase Energy Efficiency and Occupational Safety” (TR 33039), “Developed new methods for diagnosis and examination mechanical strucutures” ...
... bg.ac.rs (T.S.) 2 Faculty of Mechanical Engineering, University of Belgrade, 11000 Belgrade, Serbia; ubugaric@mas.bg.ac.rs 3 Ministry of Mining and Energy, 11000 Belgrade, Serbia; ivan.jankovic@mre.gov.rs * Correspondence: stevan.djenadic@rgf.bg.ac.rs; Tel.: +381-11-3219-195 Received: 17 September ...
... gf.bg.ac.rs (T.S.) Faculty of Mechanical Engineering, University of Belgrade, 11000 Belgrade, Serbia; ubugaric@mas.bg.ac.rs Ministry of Mining and Energy, 11000 Belgrade, Serbia; ivan.jankovic@mre.gov.rs * Correspondence: stevan.djenadic@regf.bg.ac.rs; Tel.: +381-11-3219-195 check for Received: 17 ...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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Concepts for Improving Machine Learning Based Landslide Assessment
Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić. "Concepts for Improving Machine Learning Based Landslide Assessment" in Natural Hazards GIS-based Spatial Modeling Using Data Mining Techniques, Advances in Natural and Technological Hazards Research, volume 48, Springer Nature Switzerland AG 2019 (2019). https://doi.org/10.1007/978-3-319-73383-8_2
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A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System
This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFISMiljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić. "A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System" in Energies, MDPI AG (2023). https://doi.org/10.3390/en16072958