Претрага
789 items
-
Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... 0 % 423,5 0 % 402,0 0 % 402,0 L 2 % 790,7 C 2 % 1139,6 L 2 % 783,1 C 2 % 1159,0 L 2 % 787,5 C 2 % 1147,2 L 4 % 753,7 C 4 % 1308,5 L 4 % 864,9 C 4 % 1333,4 L 4 % 817,2 C 4 % 1324,4 L 6 % 735,8 C 6 % 1250,6 L 6 % 950,4 C 6 % 1202,8 L 6 % 832,6 C 6 % 1227,1 The value ranges of the uniaxial ...
... 538,4 0 % 527,2 0 % 527,2 L 2 % 1147,8 C 2 % 1139,6 L 2 % 1039,3 C 2 % 1159,0 L 2 % 1087,4 C 2 % 1147,2 L 4 % 1890,1 C 4 % 1308,5 L 4 % 1726,8 C 4 % 1333,4 L 4 % 1772,8 C 4 % 1324,4 L 6 % 2312,0 C 6 % 1250,6 L 6 % 2390,8 C 6 % 1202,8 L 6 % 2387,4 C 6 % 1227,1 The value ranges of the uniaxial ...
... Compressive strength Rc / kPa L 2 % 1489,5 C 2 % 1663,8 L 2 % 1352,7 C 2 % 1542,2 L 2 % 1406,0 C 2 % 1523,4 L 4 % 2668,9 C 4 % 1901.0 L 4 % 2723,7 C 4 % 1610,6 L 4 % 2689,2 C 4 % 1748,7 L 6 % 4196,1 C 6 % 1831,2 L 6 % 4094,7 C 6 % 1883,6 L 6 % 4008,0 C 6 % 1872,5 3.5.2 Indirect tensile strength ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
-
Microstructural and magnetic properties of electrospun hematite/cuprospinel composites
Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic MaterialsMira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić. "Microstructural and magnetic properties of electrospun hematite/cuprospinel composites" in Journal of Materials Science: Materials in Electronics, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s10854-020-03526-0
-
Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva
Ljiljana M. Vasić (2017-07-14)postupaka koji je primenjen u cilju definisanja zona prihranjivanja i veze izmeđupodzemnih i površinskih voda, vremena koje voda provede u podzemlju, pri čemu seformira jedinstven hemijski sastav i temperaturni režim isteklih voda, bili su polaznaosnova za usmerenje na istraživanje karsta i definisanje teme doktorske disertacije.Kučajsko-beljanički masiv se nalazi u istočnoj Srbiji i pripada oblasti Karpatobalkanskogluka i idealan je poligon za istraživanje, obzirom da se u okviru njega nalazejaka karstna vrela i pojave toplih karstnih izvora na relativno malom rastojanju, ...karstni sistemi, geneza podzemnih voda, izotopske metode, starost voda,hidrogeohemijski procesi, dubina cirkulacije podzemnih voda, subtermalne i termalnevode... Psychological Measurement 20, pp. 141-151. 44. Kelly WR, Panno SV, Hackley KC (2009) Bacteria contamination of groundwater in a mixed land-use karst region water quality, Exposure and Health doi: 10.1007/s12403-009-0006-7 45. Kendall C., Sklash M. G., Bullen T. D. (1995) Isotope tracers of water and ...
... iznad 20 °C, pri čemu se vode preko 20 °C dele na hipoterme (20-34 °C), homoterme (34-38 °C) i hiperterme (preko 38 °C). Ovčinikov (1974) izdvaja mineralne vode na osnovu balneološkog aspekta na hladne (ispod 20 °C), tople (20-37 °C), termalne (37-42 °C) i visokotermalne (preko 42 °C) (Krunić ...
... do 30 °C) − (hidro)geotermalna energija u užem smislu (temperaturom fluida od 30 °C do 100 °C) Na osnovu svih navedenih kriterijuma i podela voda, za područje Kučajsko-beljaničkog masiva se može usvojiti generalna podela na: 1. Hladne vode (do 12 °C) i 2. Tople vode (preko 12 °C). ...Ljiljana M. Vasić. "Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-07-14)
-
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)
-
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
-
Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората
... H Op3HHe porTanje TIOJba, Beh CaMO 0J1 Đ=croBe JauuHc [5]. [1] C. Viedma, Phys. Rev. Lett., 94 (2005) 005504-1-065504-4. [2] C. Rougeot, F. Guillen, J.-C Plaquevent, G. Coquerel, Cryst. Growth Des., 15 (2015) 2151—2155. [3] C. Xiouras, J. V. Aeken, J. Panis, J. H. T. Horst, T. V. Gerven, G. D ...
... field rotational frequency, but only on its strength [5]. [1] C. Viedma, Phys. Rev. Lett., 94 (2005) 0065504-1-065504-4. [2] C. Rougeot, F. Guillen, J.-C Plaquevent, G. Coquerel, Cryst. Growth Des., 15 (2015) 2151—2155. [3] C. Xiouras, J. V. Aeken, J. Panis, J. H. T. Horst, T. V. Gerven, G. D ...
... KpHcTaja HaTpHjyM-XJopaTa MH3 BOJUĆHHMX pacrBopa dacHheHMx Ha TeMmeparypH 7,={(3l.0+0.1)C. Kpucrama cy HyKJIeHcaHH H pacjiH y TOHIJIOTHO H3OJTIOBaHoj mocy,)uH ca 20 ml pacrBopa Ha TeMrIIepaTypH 7T =(26.0+0.1)"C , y oOprHOM MaTrHCTHOM ITIOJby jauHHe B = (150+9) mT, npu Op3HHH porauuje 200-1200 ob/min ...М. Милојевић, А. Жекић, П. Дабић, Б. Вучетић, Б. Максимовић. "Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората" in XXVII конференција Српског кристалографског друштва, Чачак, 14-15. јун, 2023., Београд : Српско кристалографско друштво (2023)
-
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... thermal degradation. Decarboxylation and decarbonylation result in lower O/C and higher H/C, dehydrogenation in lower H/C and demethanization in lower H/C and higher O/C. Evolution of other volatile compounds also affect O/C and H/C. The largest deviation from the linear fit is found for CS180h and PW700g ...
... low. The fraction of sp* hybridized Table 7. XPS of C1s at the surface of ground chars and sample HW1100g" without pretreatment. Char C-C sp? /% C-C sp*/% C-O/% C=O/% COO /% TTČ /% K2p3 /% K2pl/% ACI 86.1 0.0 2.5 3.0 2.4 5.9 AC2 51.0 30.1 9.0 2.8 3.6 35 SW500f 22.3 32.4 34.6 6.2 3.0 1.5 HW500f ...
... (Table 8) for C = O and C-O, however, are contradictory indicating that the chosen standard evaluation does not yield unambiguous results for the relative quantities of different oxygen functional groups. The values for C1s suggest a weak increase of C-O and a relatively strong increase of C = O, whereas ...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
-
Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints
Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski. "Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints" in Journal of Geodynamics, Elsevier BV (2024). https://doi.org/10.1016/j.jog.2024.102058
-
Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017
-
The demir kapija ophiolite, Macedonia (FYROM): A Snapshot of subduction initiation within a back-arc
Božović Milica, Prelević Dejan, Romer Rolf, Barth Matthias, van den Bogaard Paul, Boev Blazo. "The demir kapija ophiolite, Macedonia (FYROM): A Snapshot of subduction initiation within a back-arc" in Journal of Petrology 54 no. 7, Oxford, United Kingdom :Oxford University Press (2013): 1427-1453. https://doi.org/doi.org/10.1093/petrology/egt0
-
Ultrapotassic mafic rocks as geochemical proxies for post-collisional dynamics of orogenic lithospheric mantle: The case of southwestern Anatolia, Turkey
Prelević Dejan, Akal Cüneyt, Foley Stephen, Romer Rolf, Stracke Andreas, Van den Bogaard Paul (2012)Prelević Dejan, Akal Cüneyt, Foley Stephen, Romer Rolf, Stracke Andreas, Van den Bogaard Paul. "Ultrapotassic mafic rocks as geochemical proxies for post-collisional dynamics of orogenic lithospheric mantle: The case of southwestern Anatolia, Turkey" in Journal of Petrology 53 no. 5, Oxford, United Kingdom :Oxford University Press (2012): 1019-1055. https://doi.org/10.1093/petrology/egs008 10
-
Unraveling Innerworkings of Magmatic System Beneath the East Pacific Rise 9º50’N
Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Felix Waldhauser, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Malden R. Nedimović, Juan Pablo Canales, Hélène D. Carton, Javier Escartin, John C. Mutter (2021)... Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Felix Waldhauser, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Malden R. Nedimović, Juan Pablo Canales, Hélène D. Carton, Javier Escartin, John C. Mutter Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду ...
... | Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Felix Waldhauser, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Malden R. Nedimović, Juan Pablo Canales, Hélène D. Carton, Javier Escartin, John C. Mutter | AGU Fall Meeting 2021 | 2021 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005686 ...
... Marjanović1, Suzanne M. Carbotte2, Alexandre Stopin3,4, Felix Waldhauser2, Satish C. Singh1, René-Édouard Plessix3, Miloš Marjanović5, Malden R. Nedimović2,6, Juan Pablo Canales7, Hélène D. Carton1, Javier Escartin8, John C. Mutter2 1Université de Paris, Institut de Physique du Globe de Paris; ...Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Felix Waldhauser, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Malden R. Nedimović, Juan Pablo Canales, Hélène D. Carton, Javier Escartin, John C. Mutter. "Unraveling Innerworkings of Magmatic System Beneath the East Pacific Rise 9º50’N" in AGU Fall Meeting 2021, American Geophysical Union (2021)
-
A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)
Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenikaGordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević. "A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)" in Marine and Petroleum Geology, Elsevier BV (2021). https://doi.org/10.1016/j.marpetgeo.2021.105383
-
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
-
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
-
Managing mining project documentation using human language technology
Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentationAleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja . "Managing mining project documentation using human language technology" in The Electronic Library (2018). https://doi.org/10.1108/EL-11-2017-0239
-
The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
-
Lamprofiri Kolaričke reke (Boranja)
Luka Jović (2024)Lamprofiri su grupa egzotičnih ultrakalijskih stena poznatih po sadrţaju nekompatibilnih elemenata i elemenata retkih zemalja. U našem delu sveta pojavljuju se u okviru ultrakalijskih provincija u Španiji, Italiji, Srbiji, Makedoniji i Turskoj. U Srbiji su zastupljeni ponajviše u zapadnim delovima zemlje, oko opština Ljubovija i Mali Zvornik, ali i u široj okolini Rudnika, Kopaonika i u istočnoj Srbiji. Mnoga ispitivanja sprovedena su u rudnom polju Veliki Majdan u zapadnoj Srbiji sa čije jugoistočne strane protiče Kolarička reka. Ovaj lokalitet ...geohemija, lamprofiri, ultrakalijski magmatizam, elementi retkih zemalja, mešanje magmi, mineta, kersantit, flogopit... Ctc/OP?b t/II6GP?T PcOtcO'b O B P A / O ' JN PCLG61'0 9 0 c 6 0 C O tetlOPTO0 8ogbcCO0 IV SbP8cCIRC COCg'C IIGIG/C I6GccOC O C C I C C C 6/OS6/.C S O I G B ' C IV L O C C L L I P6CSP69'lL /CctcOR'T Z t O I O Z I LL Lbt861'6 CPtP/O'6 tI9CO01l'6 CCGCPbC6 ...
... 1I60I8O0'S 9O0ISIgC 9 6 0 1 P i (6O/SdBdCR C/CPOL'P} PSCSS6'C OCCCBO't PSIC6/'C +6tO0867C tc8068C 68C8O8'C 96COPO'S P6OSt6'P #SCc69/P6'P SIN OPC8C'O O C I / C C O C c 8 8 O P C IC/tCOr'I PIIGCCO C6cC/09'0 O S P I I E C /OICCCC t6B8C8O'I OCIP/ST O6CredCC SdeCIOPC ...
... 8 6 / P I F O CcIIcTO c g c e I T O 1088900 t60990'0 O 6cc610'0 Pc6cIO0'0 I/OCIO'0 tc1Oc0'0 bće! C t R P A C I ICCOIP' I PPStE/P I C P P C C P I PSOSPP I cIZ/ECI OCOOPP'I Ćl 1 8 8 1 0 1 tPoc6'O C/S/OO0'T oclIcO' O o C L S L C P COOO/LC'P PIPoSP?b ...Luka Jović. Lamprofiri Kolaričke reke (Boranja), 2024
-
Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
-
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