Претрага
228 items
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BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties
Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition... promising, types of magnetoelectric multiferroics [10-14]. The advantages of these novel materials can support the development of advanced devices and technologies [15-20]. There are only a few known multiferroic materials that combine the mutually exclusive functionalities of ferromagnetism and ferroe ...
... s were conducted in the electrical field range of 5-40 kV/cm on the Precision Multiferroic Test System with High Voltage Interface (Radiant Technologies, Inc., Albuquerque, New Mexico). 4. Conclusions The aim of this study was the investigation of the effect of phase composition on the magnetic ...Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković. "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, MDPI AG (2023). https://doi.org/10.3390/inorganics11020051
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Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species
Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić. "Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species" in Nanotechnology, IOP Publishing (2019). https://doi.org/10.1088/1361-6528/ab3ca2
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Building Terminological Resources in an e-Learning Environment
... from RudOnto. Thus, we started with a glossary of basic concepts related to Geographical information systems (GIS) within the course Information technologies. For each concept separate Serbian and English entries were created. In line with the standard requirements for glossaries, besides the basic ...Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja. "Building Terminological Resources in an e-Learning Environment" in Proceedings of the Third International Conference on e-Learning, eLearning-2012, September 2012, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2012)
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Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
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Linear-motor plunger pump increases lifting efficiency
Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev. "Linear-motor plunger pump increases lifting efficiency" in Oil & Gas Journal (2022)
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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... methods of work. Techniques Technologies Education Management, vol. 5, br. 4, 861–866. VIDANOVIC N., OGNJANOVIC S., ILINCIC N., ILIC N., TOKALIC R., 2011: Ap- plication of unconventional methods of underground premises construction in coal mines. Technics Technologies Education Management-TTEM, vol ...
... minerals exploitation. Technics Technologies Education Management-TTEM, vol. 6, br. 4, str. 1053–1057. SAVIC LJ., TOKALIC R., VIDANOVIC N., TRAJKOVIC S., GANIC A., 2011: Defining of optimal geometry of drilling chisel's blade for Led and Zinc ore. Technics Technologies Education Management-TTEM, vol ...
... – Technics Technologies Education Management, str. 1030–1036, Vol.7, No.3, 8./9.2012. BOŠKOVIĆ Z., MITROVIĆ V., MALBAŠIĆ T., STUPAR J., 2012: Deep oil wells between production and disaster (Duboke naftne bušotine između proizvodnje i katastrofe). Journal TTEM – Technics Technologies Education Management ...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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Mineral Resources of Serbia: Environmental, Societal and Economic Challenges
... projects: FAO Projects, TR 31054 - “Development of new cereals cultivation technologies on acid soils by usage of modern biotechnology” and TR 31057 - “Improvement of genetic potential and fodder production technologies in the function of sustainable livestock development”, financed by the Ministry ...
... CO2eq (10.6% of total emissions, excluding removals). Livestock sector amounted to 47.5% of total sector's emissions, aggregate sources and non-CO2 land emissions sources 47.1% and other land emissions 5.5%. Projected emissions in 2020 are 6,753.00 Gg CO2eq. As a non-Annex I Party to the UNFCCC ...
... J. J. and Rao, D. G. (2002). “Changes in Soybean Yields in the Midwestern United States Bas Result of Future Change in Climate Variability and CO2.” Climaftic Change, 53:447—75. Statistical Office of the Republic of Serbia. 2012. Srafistical Yearbook ofthe Republic of Serbia 2012. Belgrade, ...Vladimir Simić, Rade Jelenković, Dragana Životić. "Mineral Resources of Serbia: Environmental, Societal and Economic Challenges" in Serbia: Current Issues and Challenges in the Areas of Natural Resources, Agriculture and Environment,, Nova Science Publishers, Inc. (2019)
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Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach
Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...... Pharmacy, University of Belgrade, Vojvode Stepe 450, 11221 Belgrade, Serbia; vladimir.dobricic@pharmacy.bg.ac.rs 6 Department of Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia; danijela@nanosys.ihtm.bg.ac.rs ...
... of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11221 Belgrade, Serbia; vladimir.dobricic@pharmacy.bg.ac.rs Department of Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, Dokovicé, J.B.; Kremenovié¢, A.; Dobriti¢, V.D.; Randjelovi¢, D.V.; Panteli¢, I.; Cook, J.M ...Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić. "Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach" in Pharmaceutics, MDPI, Basel, Switzerland (2021). https://doi.org/10.3390/pharmaceutics13081188
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A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach
Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependabilityNikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović. "A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach" in Applied Sciences, Basel, August 2024, MDPI (2024). https://doi.org/https://doi.org/10.3390/app14177947
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Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља
Бојан Земљак (2024)Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...... and Ghahreman, A., 2021. Recovery of rare earth and some other potential elements from coal fly ash for sustainable future. In Cleanm Coal Technologies: Beneficiation, Utilization, Transport Phenomena and Prospective. Cham: Springer International Publishing, p. 339-380. [15] Ramirez-Caro, D ...
... Tulane University School of Science and Engineering). [66] Balaram, V., 2022. Sources and applications of rare earth elements. Environmental Technologies to Treat Rare Earth Elements Pollution: Principles and Engineering; IWA Publishing: London, UK, p.75-113. [67] Chakhmouradian, A.R. and Wall ...
... , Ahn, J.W., Parhi, P.K., Chung, K.W. and Lee, J.Y., 2020. Review of rare earth elements recovery from secondary resources for clean energy technologies: Grand opportunities to create wealth from waste. Jouwmal of Cleaner Production, 267, p.122048. [143] Chen, Y., Liu, W., Feng, J., Guo, R., ...Бојан Земљак. Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља, 2024
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Indexing of textual databases based on lexical resources: A case study for Serbian
In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...... constant increase of geological data and information in Serbia was not accompanied by adequate development and introduction of modern informa- tion technologies until recently. Thus the management of the various geologi- cal documentation has been organized on the principle of traditional libraries and archives ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Indexing of textual databases based on lexical resources: A case study for Serbian" in Semantic Keyword-based Search on Structured Data Sources : First COST Action IC1302 International KEYSTONE Conference, IKC 2015, Coimbra, Portugal, September 8-9, 2015. Revised Selected Papers, Springer (2015). https://doi.org/10.1007/978-3-319-27932-9_15
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Automatic construction of a morphological dictionary of multi-word units
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion... Belgrade (2008) 3. Savary, A.: Computational Inflection of Multi-Word Units - A Contrastive Study of Lexical Approaches. Linguistic Issues in Language Technologies 1 (2008) 4. Krstev, C., Vitas, D.: Finite State Transducers for Recognition and Generation of Compound Words. In Erjavec, T., Žganec Gros, J. ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić. "Automatic construction of a morphological dictionary of multi-word units" in Lecture Notes in Computer Science 6233, Advances in Natural Language Processing, Proceedings of the 7thInternational Conference on NLP, IceTAL 2010, Reykjavik, Iceland, August 2010, Springer (2010): 226-237. https://doi.org/10.1007/978-3-642-14770-8_26
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An intelligent hybrid system for surface coal mine safety analysis
Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić. "An intelligent hybrid system for surface coal mine safety analysis" in Engineering Applications of Artificial Intelligence (2010)
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Serbian NER&Beyond: The Archaic and the Modern Intertwinned
U ovom radu predstavljamo srpski književni korpus koji se razvija pod okriljem COST Akcije „Distant Reading for European Literary History” CA16204. Koristeći ovaj korpus romana napisanih pre više od jednog veka, razvili smo i učinili javno dostupnim Sistem za prepoznavanje imenovanih entiteta (NER) obučen da prepozna 7 različitih tipova imenovanih entiteta, sa konvolucionom neuronskom mrežom (CNN), koja ima F1 rezultat od ≈91% na test skupu podataka. Ovaj model je dalje ocenjen na posebnom skupu podataka za evaluaciju. Završavamo poređenje ...... En- tities. In Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Langua- ge Technologies, volume 1, pages 2138–2144. Niels Dekker, Tobias Kuhn, and Marieke van Erp. 2019. Evaluating Named Entity Recognition To- ols for Extracting Social ...Branislava Šandrih Todorović, Cvetana Krstev, Ranka Stanković, Milica Ikonić Nešić. "Serbian NER&Beyond: The Archaic and the Modern Intertwinned" in Proceedings of the Conference Recent Advances in Natural Language Processing - Deep Learning for Natural Language Processing Methods and Applications, INCOMA Ltd. Shoumen, BULGARIA (2021). https://doi.org/10.26615/978-954-452-072-4_141
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Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names
In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...... Sameer Singh, Dustin Hillard, and Chris Leggetter. 2010. Minimally-supervised Extraction of Enti- ties from Text Advertisements. In Human Lan- guage Technologies: The 2010 Annual Conference of the North American Chapter of the Associa- tion for Computational Linguistics. Association for Computational Linguistics ...Branislava Šandrih, Cvetana Krstev, Ranka Stanković. "Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names" in Proceedings - Natural Language Processing in a Deep Learning World, Incoma Ltd., Shoumen, Bulgaria (2019). https://doi.org/10.26615/978-954-452-056-4_122
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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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Integrative GHG Assessment in Oil and Gas Industry
Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...... 1016/|.jclepro.2018.07.032. 3| Ritchic, H., Roser, M., Rosado, P. CO: and Greenhouse Gas Emissions, Our World Data, 2020. https://ourworldindata.org/co2-and-greenhouse-gas- emissions [pristupljeno 09.02.2023| 4] Schulz,C.IPCC Report 2022, AR6: Summary Part 1. https://www.fortomorrow.cu/en/post/ipcc2022- ...
... Climate Change, Paris, 12 December 2015. https://unfccc.int/sites/default/files/english_paris_agreement.pdf [pristupljeno 10.02.2023| 7] Fossil CO2 emissions by country. https://edgar.jrc.ec.europa.cu/report_2022?vis=pop#emissions_table [pristupljeno 10.02.2023| S] Compendium of greenhouse gas ...
... instead of average emission factors. Country-specific factors can vary e> energija, ekonomija, ekologija, 2023, god. XXV, br. 1 betwecen fucis, technologies, individual plants, etc. The use of country-specific cmission factors derived from #detailed information is cxpccted to reduce thc uncertaintics ...Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa. "Integrative GHG Assessment in Oil and Gas Industry" in Energija, ekonomija, ekologija (2023). https://doi.org/10.46793/EEE23-1.51M
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Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal
Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo... molecules and KOH reduction to metal K. At the same time, K2CO3 which may also be formed during the activation, may be reduced by carbon to K, K2O, CO, and CO2 what also, as a consequence, may have creating porous Minerals 2018, 8, 246 10 of 21 carbon surface. An additional reason for microstructure destroying ...
... carbon; hydrothermal treatment; hydroxide activation; heavy metals; methylene blue 1. Introduction The increasing human need for new products and technologies has led to intensive development of industry. On the other side, industrial development is usually followed by high levels of potentially hazardous ...
... carbon; hydrothermal treatment; hydroxide activation; heavy metals; methylene blue 1. Introduction The increasing human need for new products and technologies has led to intensive development of industry. On the other side, industrial development is usually followed by high levels of potentially hazardous ...Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović . "Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal" in Minerals, MDPI (2018)
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Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike
... analizu uticaja materija koje formiraju penu penušavci i materija koje utiču nanjenu stabilnost nezavisno od sadržaja CO2. U tu svrhu, visina pene i struktura pene piva mereni su tako što je CO2 uklonjen pre merenja. Analiza je pokazala da ponašanje pene uzoraka piva koje je standardizovano za merenje u velikoj ...
... proizvodnje. Razlog za to leži u razlikama u sadržaju ugljen- dioksida (CO2) koji nastaje tokom procesa vrenja i koji zajedno sa proteinima učestvuje u stvaranju pene.Stabilnost pene ne zavisi samo od sadrz aja proteina, vec i od uticaja CO2. Da bi se mogao analizirati uticaj supstanci koje formiraju penu ...
... treba ukloniti CO2 iz uzoraka. To osigurava da su razlike u penivosti i stabilnosti pene kod razlic itih vrsta piva povezane samo sa sastavom tec nosti. Pomoc u savremenog uređaja Dynamic Foam Analyzer - DFA100 može se analizirati uticaj surfaktanata u pivu nezavisno od sadržaja CO2 i njegovog uticaja ...Мирослав Црногорац, Душан Даниловић, Лола Томић. "Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike" in IX Naučno stručni skup Preduzetništvo, inženjerstvo i menadžment Zrenjanin, 24.10.2020. god., Visoka tehnička škola strukovnih studija u Zrenjaninu (2020)
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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.... corpora are developed within research activities of Human Language Technology (HLT) Group at the University of 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; ...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