Претрага
2843 items
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Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija
Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić (2015)Biougalj se dobija pirolizom iz organskog otpada. Smatra se ,,modifikatorom'' zemljišta i koristi se kao đubrivo i kao rezervoar za skladištenje ugljenika. Kvantifikacija funkcionalih grupa je važna zbog hemijske reaktivnosti biougljeva koji imaju uticaj na svojstva zemljišta. U istraživanju su korišćena 3 uzorka biouglja različitog porekla i jedan referentni, aktivni ugalj. Sadržaj kiselih funkcionalnih grupa je određivan titracijom po Boehm-u na dva načina: uvođenje N2 tokom titracije i tretman sa BaCl2. Optimizovan je način pripreme tri Boehm ova rastvora ...... organic compounds and the time of sparging by N2. In order to check the efficiency this methods, spectrofotometry is used at a wavelenght of 250 nm. ‘This work was funded by the Ministry of Education, Science and Technological Development od the Republic of Serbia, Project No. 172051 Reference 1. ...
... Belgrade, Serbia *Faculty of Mining and Geology, University of Belgrade, Djusina 7, Belgrade; **Institute of general and physical chemistry, Studentski trg 12-16, Belgrade; ***Faculty of Physical chemistry, University of Belgrade, Studentski trg 12-16, Belgrade ‘“***Institute of Chemistry, Technology ...
... the pyrolisis of organic waste. Biochar is a soil modifier due to its fertilizing effect and its potential for carbon storage. Quantification of functional groups is interesting because chemical reactivity of biochar can have effect on soil properties. In this researh different samples of biochar are ...Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić. "Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija" in 52. savetovanja Srpskog hemijskog društva, Srpsko hemijsko društvo (2015)
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Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava
Boban S. Pavlović (2022)Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošačaBoban S. Pavlović. Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava, Beograd : [B. Pavlović], 2022
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Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje
Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...... along with appropriate centralized databases. This paper provides an overview of the current position of mining from the perspective of digital transformation, as well as a proposal for a simple prototype in the form of a digital system for business reporting and analytics. Keywords: mining, digital ...
... радовима запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository ...
... komunikacionih tehnologija država kroz Indeks razvoja (engl. /C7 Development Index), Republika Srbija je pozicionirana na 55. mestu u odnosu na 176 država sveta [1]. Organizacija OECD (engl. Organization for Economic Co-operative and Development) ukazuje na to da napredak digitalne tehnologije drastično ...Stevan Đenadić, Aleksandar Mirković, Veljko Rupar . "Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje" in XVI Međunarodna rudarska konferencija OMC 2024, Zlatibor, 9 - 12. oktobar 2024, Jugoslovenski komitet za površinsku eksploataciju (2024)
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Development Trends in the MiningIndustry
Jovančić Predrag, Milisavljević Vladimir. "Development Trends in the MiningIndustry" in Rudarstvo 2017, Zbornik radova 8. simpozijuma,Palić, 16-18 maj 2017, Beograd:Privredna Komora Srbije (2017): 1-10
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Serbian energy development based on lignite production
Jovančić Predrag, Tanasijević Miloš, Ivezić Dejan. "Serbian energy development based on lignite production" in Energy Policy 39 no. 3, Oxford;UK:Pergamon (2011): 1191-1199. https://doi.org/DOI: 10.1016/j.enpol.2010.11.0
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Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“
Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић (2024)Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић. "Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“" in Записници Српског геолошког друштва, Београд : Српско геолошко друштво (2024)
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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... economic development in every country, but at the same time it is very often one of the biggest environmental pollutants. Contamination of the environment with heavy metals mainly occurs due to mining activities, i.e., after technological processes of mineral resources where as a result of processing ...
... 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 materials which may have negative influence on the environment as well as human ...
... 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 materials which may have negative influence on the environment as well as human ...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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Prirodne vrednosti za razvoj turizma na Šar-planini (Natural values for tourism development on the Šar-mountains)
Vukoičić Danijela, Kićović Dragomir, Srećković Batoćanin Danica. "Prirodne vrednosti za razvoj turizma na Šar-planini (Natural values for tourism development on the Šar-mountains)" in Туристично пословање = Tourism business no. 7, Београд:Висока туристичка школа струковних студија (2011): 67-79
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Serbian oil sector: A new energy policy regulatory framework and development strategies
Karović-Maričić Vesna, Danilović Dušan, Leković Branko. "Serbian oil sector: A new energy policy regulatory framework and development strategies" in Energy Policy no. 51, London-Amsterdam -New York:Elsevier (2012): 311-322
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Relation Between Edaphic Factors and Vegetation Development on Copper MineWastes: A Case Study From Bor (Serbia, SE Europe)
Ranđelović Dragana, Cvetković Vladica, Mihailović Nevena, Jovanović Slobodan. "Relation Between Edaphic Factors and Vegetation Development on Copper MineWastes: A Case Study From Bor (Serbia, SE Europe)" in Environmental management 4 no. 53, New York:Springer US (2014): 800-812
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Numerical modeling of Selanac debris flow propagation using SPH code
The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...... landslide aWAREness” (BEWARE) funded by the People of Japan and the UNDP Office in Serbia (grant No 00094641). All activities are also a part of the Project TR36009 funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia. 7 REFERENCES Chen, C. and Ling, ...
... and maintained by the Innovation and Development Committee of ISSMGE. The paper was published in the proceedings of the 13th International Symposium on Landslides and was edited by Miguel Angel Cabrera, Luis Felipe Prada-Sarmiento and Juan Montero. The conference was originally scheduled to ...
... discussed by Pastor et al. (2009) considering: A. balance of mass of the mixture—propagating along the slope and increasing due to bed entrainment—combined to the balance of linear momentum of pore water, B. the balance of linear momentum of the mixture, C. a kinetic relation between the defor ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
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Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry
Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalizationSteven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti. "Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945979
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Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement
Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić,. "Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement" in International scientific conference Challenges in Applied Geology and Geophysics: 100th Anniversary of Applied Geology at AGH University of Science and Technology, Book of abstracts, Kraków, Poland, 10-13. Sep. 2019, Kraków, Poland : AGH University of Science and Technology (2019)
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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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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 ...... NLP methods, and the evaluation of this improve- ment. 2 Motivation The 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 ...
... , organizational, etc. Another lexical resource that is being developed for Serbian is Wordnet (SWN), whose development started in 2001 as part of the Balkanet project. In its initial phase, all languages featured in Balkanet followed the approach sim- ilar to EuroWordnet, namely, developing monolingual ...
... The SWN is continuously growing [12] and today has more than 22 thousand synsets linked to the Princeton Word- Net 3.0 through ILI. During the development of the SWN, special attention was given to certain conceptual domains — emotions — and scientific domains — biological species, biomedicine, nutrition ...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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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)... Ministry of Education, Science and Technological Development of the Republic of Serbia through Project No. 176010 and Project No. 43007. References Amjad Z. (1988) Calcium sulfate dihydrate (gypsum) scale formation on heat exchanger surfaces: the influence of scale inhibitors. Journal of Colloid ...
... Report by an NEA Group of Experts. Organisation for Economic Co-operation and Development, Paris, France, 40 pp. Pantelić G.K., Todorović D.J., Nikolić J.D., Rajačić M.M., Janković M.M. & Sarap N.B. (2015) Measurement of radioactivity in building materials in Serbia. Journal of Radioanalytical and ...
... respectively. The limit for Ra,q is 370 Bq kg !, set by the report of the Organisation for Economic Co-operation and Development (OECD, 1979). To assess the radiological hazard associated with the investi- gated samples of phosphogypsum, the y index for construction materials was calculated using ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11
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Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area
Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić . "Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area" in Carpathian Journal of Earth and Environmental Sciences (2016)
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Fuzzy stohastički model izbora sistema otvaranja podzemnog rudnika
Saša M. Jovanović (2016-05-16)Investiciono okruženje skopčano sa rudarskom industrijom je veoma svojstveno kada seuporedi sa okruženjima koje susrećemo u tipičnim proizvodnim industrijama. Neke odkarakterisitka rudarstva, koje su često naznačene kao jedinstvene su: visok intenzitetinvesticija, dugi predproizvodni periodi, visok rizik i neobnovljivost resursa.Investiranje u sistem otvaranja rudnika predstavlja dobar primer ireverzibilneinvesticije. Takva investicija zahteva pažljivu analizu, jer nakon njene realizacije ona sene može nadoknaditi bez značajnog gubitka vrednosti. Očigledno je da izbor sistemaotvaranja podzemnog rudnika pripada strateškom planiranju...... that , the number of potential alternatives is increased. Generally speaking, the process of selection of an underground mine development system encompasses the identification, evaluation and selection among alternatives. To solve the problem of selecting a suitable development system, we consider ...
... stochastic model of underground development system selection. Saša M. Jovanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Fuzzy stohastički model izbora sistema otvaranja podzemnog rudnika;Fuzzy stochastic model of underground development system selection ...
... disertacija Beograd, 2016. UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Saša M. Jovanović FUZZY STOCHASTIC MODEL OF UNDERGROUND MINE DEVELOPMENT SYSTEM SELECTION Doctoral Dissertation ...Saša M. Jovanović. "Fuzzy stohastički model izbora sistema otvaranja podzemnog rudnika" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-05-16)
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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic
Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...... Overview of the Techniques for Selecting Optimal Artificial Lift Methods Several authors have been involved in development of techniques for selecting optimal artificial lift methods. In 1981, Buford Neely and a group of authors published summaries of panel discussions on the topic of Selection of an ...
... agreed to the published version of the manuscript. Funding: This research received no external funding. Acknowledgments: This article is the result of the Project No. 33001 financed by the Ministry of Education, Science and Technological Development of the Republic of Serbia. We thank the Ministry for ...
... sistem analize. MsC. Thesis, University of Belgrade, Beograd, Serbia, 2008. 26. Elhaddad, E.E. New Model for Achieving Optimum Production at Amal Oilfield. Ph.D. Thesis, University of Belgrade, Beograd, Serbia, 16 April 2015. 27. Aliyev, E. Development of Expert System for Artificial Lift Selection ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
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Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija
Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)... Geological and ecotoxicological investigations in identification of geopathogenic zones of toxic elements in the reservoirs of drinking water supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. Author Contributions: In this paper, the authors Gordana M ...
... the impact ranking of tailings from processing of flotation of metallic mineral ores on the local environment. Conflicts of Interest: The authors declare no conflict of interest. References 1. Ristović, I.; Stojaković, M.; Vulić, M. Recultivation and Sustainable Development of Coal Mining in Kolubara ...
... method with a high level of quality that combines and allows analysis of multiple elements. The method for ranking the effect of tailings on the surrounding ecosystem had to fulfil the following criteria: it should be in compliance with the concept of sustainable development; it should be in compliance ...Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić. "Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija" in Energies, MDPI AG (2016). https://doi.org/10.3390/en9110935