Претрага
2175 items
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Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia
У циљу оцене стања животне средине и разумевања потенцијалних узрока још раније евидентираног лошег хемијског статуса водног тела подземних вода „Крш–север“, извршенa je хидрогеолошка проспекција шире околине лежишта бакра Мајданпек, која је укључилаистраживање површинског копа, флотационог језера и главних карстних врела и пећина. Имајући у виду да се експлоатационо поље рудника бакра Мајданпек директно граничи са карстном издани и водним телом подземних вода „Крш–север“, параметри квалитета подземне воде су анализирани (in situ и лабораторијски) на два главна карстна врела ...Zoran Stevanović, Veljko Marinović, Branislav Petrović. "Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia" in Geoloski anali Balkanskoga poluostrva (Annales geologiques de la Peninsule balkanique), University of Belgrade, Faculty of Mining and Geology (2020). https://doi.org/10.2298/GABP201107010S
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Construction of Bijelo Polje bypass on the section over the active landslide “Obrov”
Lapčević Radojica, Maksović Mišo, Bogdanović Snežana, Basarić Irena. "Construction of Bijelo Polje bypass on the section over the active landslide “Obrov”" in 2st Regional Symposium on Landslides in the Adriatic-Balkan Region - ReSyLAB 2015, Beograd:Rudarsko-geološki fakultet, Univerzitet u Beogradu (2015): 59-59
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Inženjerskogeološki uslovi izgradnje prve deonice autoputa Niš – Merdare“ (Engineering-geological conditions for the construction of the first section of Niš-Merdare highway),
Rakić Dragoslav, Berisavljević Zoran, Basarić Irena, Lazić Mirko, Miloš Stevanović. "Inženjerskogeološki uslovi izgradnje prve deonice autoputa Niš – Merdare“ (Engineering-geological conditions for the construction of the first section of Niš-Merdare highway)," in Treći Srpski kongres o putevima, Beograd: (2018): 12-23
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Parametric adjustment of a junction triangle in terms of the precise construction of haulage drives in underground mines
Ganić Aleksandar, Ristović Ivica, Đorđević Dragan, Vulić Milivoj. "Parametric adjustment of a junction triangle in terms of the precise construction of haulage drives in underground mines" in REM – Revista Escola de Minas 63 no. 3, Ouro Preto, Brasil:RBC Editoracao Eletronica (2010): 529-538
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Preliminary Examination of the System Fly Ash–Bottom Ash–Flue Gas Desulphurization Gypsum–Portland Cement–Water for Road Construction
Tokalić Rade, Marinković Slobodanka, Trifunović Prvoslav, Dević Gordana, Zildzović Snežana. "Preliminary Examination of the System Fly Ash–Bottom Ash–Flue Gas Desulphurization Gypsum–Portland Cement–Water for Road Construction" in Journal of Chemistry, :Hindawi Publishing Corporation (2013). https://doi.org/doi:10.1155/2013/421480
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The effect of the content of unburned carbon in bottom ash on its applicability for road construction
Trifunović Prvoslav, Marinković Slobodanka, Tokalić Rade, Matijašević Srdjan. "The effect of the content of unburned carbon in bottom ash on its applicability for road construction" in Тhermochimica Acta, 20 January 2010 498 no. 1–2, Amsterdam, Netherlands:Elsevier BV (2010): 1-6. https://doi.org/10.1016/j.tca.2009.10.022
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Case Study of Ventilation Method Development for Bar-Boljare Highway Tunnel Construction in Montenegro
Cvjetić Aleksandar, Lilić Nikola, Čokorilo Vojin, Milisavljević Vladimir. "Case Study of Ventilation Method Development for Bar-Boljare Highway Tunnel Construction in Montenegro" in Tehnika LXXII no. 5, Beograd:Savez Inžinjera i Tehničara Srbije (2017): 667-674
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Analiza seizmičkog dejstva eksplozije pri miniranju na primeru izrade tunela Golubac kod Golupca
Savremeno rudarstvo, a pogotovo masovna eksploatacija metaličnih ležišta, ne bi se mogla zamisliti bez primene eksploziva. Rudarstvo je privredna grana, gde su eksplozivi našli najširu primenu za eksploataciju čvrstih mineralnih sirovina. Primena energije eksploziva dovodi do poboljšanja tehničkoekonomskih pokazatelja pri eksploataciji mineralnih sirovina, ali i do pojave negativnih efekata koji prate radove na miniranju. Eksplozivni materijali u rudarstvu, geologiji i drugim delatnostima, svojim dejstvom narušavaju prirodnu sredinu u vidu drobljenja, razbacivanja komada stene, vazdušnih udara, pojave sezmičkih efekata, pojave ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analiza seizmičkog dejstva eksplozije pri miniranju na primeru izrade tunela Golubac kod Golupca" in XV Međunarodna konferencija OMC 2022, Zlatibor, 12-15. oktobar 2022., Jugoslovenski komitet za površinsku eksploataciju (2022)
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Uniaxial compressive strength test before and after standard fire test on rock mass
Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)... fragments of rock minerals and mica (muscovite and chlorite) which are bound with a limonite clay cement. Quartz clusters dominate, building about 60% of the rock mass. They occur in grains of different sizes, from 0.05 to 0.5 mm. The grains are mostly sub-rounded and partly un-rounded. Some have ...
... determining strength and classification of rock mass. It is determined experimentally, by laboratory strength testing. Determination of uniaxial compressive strength is necessary, both in rock mechanics and in the field of application of obtained results during the construction of various underground ...
... underground structures and tunnels. If strength of the rock is lower, it will have an impact on the tunnel structure, different measures will be required to ensure the excavation and a larger amount of material needed for construction of tunnel structure. Incidental actions in tunnels, such as fire ...Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović. "Uniaxial compressive strength test before and after standard fire test on rock mass" in Fifth symposium of the Macedonian Association for Geotechnics, Ohrid, North Macedonia, 23-25. 06. 2022, Macedonian Association for Geotechnics (2022)
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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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Available technological procedures for capturing CO2 in the industrial and power generation sectors
Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...... CCS facilities in operation worlwide (Figure 2), where 12 of them include capturing CO2 from natural gas. There are also 21 facilities under construction and in advanced development [5]. Figure 2. CCS facilities in industrial sector in different stages of development [5] 251 2.2 ...
... commercial oxy-fuel combustion projects in operation worldwide [5]. This system has only been tested on pilot scale. There are few projects in construction and in early development. An illustration of oxy-fuel combustion process is given in Figure 5. Figure 5. An illustration of oxy-fuel combustion ...
... high energy consumption, and high capital and operating costs. Membrane-based separation has several advantages over other technologies due to its high CO2 capture efficiency and small capital and operational investments, and this process is fully automated, easy to control and operate. ...Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac. "Available technological procedures for capturing CO2 in the industrial and power generation sectors" in 8th International Conference Mining and Environmental Protection, 22 – 25th September 2021, Serbia, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2021)
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Određivanje zbijenosti starog komunalnog otpada
Bez obzira na savremene tretmane komunalnog otpada u svetu, u Srbiji je i dalje najčešći vid odlaganja na komunalne deponije, pa zbijanje otpada predstavlja jednu od ključnih faza formiranja deponije. Na ovaj način znatno se smanjuje zapremina otpada, ubrzava proces degradacije i produžava radni vek deponije. Zbog toga su geotehničke karakteristike komunalnog otpada prilikom zbijanja, veoma bitne kako u fazi projektovanja tako i u fazi izgradnje deponije i optimizacije prostora. Tu se pre svega misli na maksimalnu suvu zapreminsku ...Jovana Janković, Dragoslav Rakić, Irena Basarić Ikodinović, Tina Đurić. "Određivanje zbijenosti starog komunalnog otpada" in Konferencija Otpadne vode, komunalni čvrsti otpad i opasan otpad, 16-18.06.2021., Beograd : Udruženje za tehnologiju vode i sanitarno inženjerstvo (2021)
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Knowledge and Rule-Based Diacritic Restoration in Serbian
In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).... relations in the construction of polish wordnet. In Proceedings of the Global WordNet Conference, Seged, Hungary, pages 162–177. Dobrov, B. and Loukachevitch, N. (2006). Development of linguistic ontology on natural sciences and technology. In Proceedings of Linguistic Resources and Evaluation Conference ...
... (2005). Z39.19 - Guidelines for the Construction, Format and Management of Monolingual Thesauri. NISO. Pease, A. (2011). Ontology: A practical guide. Articulate Software Press. Studer, R., Benjamins, V. R., and Fensel, D. (1998). Knowledge engineering: principles and methods. Data & knowledge engineering ...
... pages 341–350. Balkova, V., Suhonogov, A., and Yablonsky, S. (2008). Some issues in the construction of a russian wordnet grid. In Proceedings of the Forth International WordNet Conference, Szeged, Hungary, volume 44. Braslavski, P., Ustalov, D., Mukhin, M., and Kiselev, Y. (2016). Yarn: Spinning-in-progress ...Cvetana Krstev, Ranka Stanković, Duško Vitas. "Knowledge and Rule-Based Diacritic Restoration in Serbian" in Proceedings of the Third International Conference Computational Linguistics in Bulgaria (CLIB 2018), May 27-29, 2018, Sofia, Bulgaria, Sofia : The Institute for Bulgarian Language Prof. Lyubomir Andreychin, Bulgarian Academy of Sciences (2018): 41-51
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Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”
... mining and surveying tasks during the pre-project and project stage of mining, as well as during the construction of mining facilities and excavation of mineral resources. Speci�c features of the project concerning excavation of the remaining reserves of bauxite in the deposit of "Podbracan", and in this ...
... Bench drifts have multiple purposes: preparation for the construction of exca- vation drifts and for the ore excavation, supplying fresh air, and as emergency exit from the pit. The adopted altitude difference between excavation levels is 10m, the same as the height of the benches at open pit, for ...
... the type of surveying instruments and their class, as well as the accuracy itself and the number of repetitions in per- forming the setting out of the geometric elements for the project. As aforementioned, this project pro- vides for a unilateral construction of mine chambers, from the main haulage ...Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić. "Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”" in Revista Escola de Minas, School of Mines Magazine, Sao paulo, Brasil : SciELO (2015)
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Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia
Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin. "Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia" in Hydrogeology Journal, Berlin, Heidelberg : Springer, International Association of Hydrogeologists (2013). https://doi.org/10.1007/s10040-013-1025-9
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Business Models for Small-scale Biomass Projects Development
Biomass is recognized as the most promising renewable energy source in Serbia. The share of biomass in Serbian final energy consumption is over 10%, but mostly related to traditional use in stoves and ovens. One of the main obstacles for wider implementation of contemporary biomass facilities is the inexperience of consumers and stakeholders in the implementation of “innovative” business models, especially in the cases of small-scale projects. In this paper, three different business models (public utility company, energy cooperative ...... have enough experience and necessary knowledge for implementing this type of projects, which include the development of a complex techno-economic analysis, provision of funds, procurement of equipment, construction of facilities, organization of supply chains, financial monitoring and plant management. One ...
... One of the solutions is that energy cooperative engages company to manage project in its name on behalf of cooperative – from design and construction of facility to operation period. However, for such solution, the cost-effectiveness parameters of the project should be somewhat more favorable. Public ...
... biomass supplier and district heating system operator. Cooperative model is optimal framework for determination ideal ratio between fuel and heat prices, and adjustment of system profitability, because cooperative members are in the same time fuel sellers and heat energy consumers, and they also expect ...Dejan Ivezić, Miodrag Gluščević, Marija Živković. "Business Models for Small-scale Biomass Projects Development" in 19th International Conference on Thermal Science and Engineering of Serbia, Niš : Faculty of Mechanical Engineering (2019)
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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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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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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... recoverable heat energy potential for other cities, with district heating systems and plans for WWTP construction, as well as for the evaluation of effects of utilization of full potential. Based on the outcomes from the first and second parts, the projection of the future state of district heating systems ...
... a water line with a capacity of 84,000 population equivalents (PE) and some elements of the sludge line for a capacity of 126,000 PE. Digesters for the treatment of sludge and biogas production facilities are under construction. Currently, approx. 60,000 inhabitants are connected to the existing ...
... at4ci ties_3. 1_ Label ling_ Guide lines. pdf. Accessed 2 Aug2019 Econoler (2012) National building energy efficiency study for Serbia. World Bank European Commission (2016) An EU strategy on heating and cooling, COM 51 final. https:// ec. europa. eu/ energy/ sites/ ener/ files/ docum ents/1_ EN_ ...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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Formative evaluation of e-learning projects with the logical framework approach
... Evaluation of E-learning projects is a topic of great interest and growing importance. The evaluation of a project is the construction of the overall judgment, based on a quali-quantitative determination of the benefits and costs associated, with scientific criterion, of a project (evaluand) ...
... Enhanced Learning, http://www.baektel.eu). BAEKTEL was initiated with the main goal of building an Open Educational Resource (OER) network offering educational materials by higher education (HE) institutions and best practice examples by enterprise experts. The network is conceived as multilingual ...
... Sage, Newbury Park, CA, 1991. [15] Sangrà A., Vlachopoulos D., Cabrera N., Building an Inclusive Definition of E-Learning: An Approach to the Conceptual Framework, The International Review of Research in Open and Distributed Learning, online at http://www.irrodl.org/index.php/irrodl/art ...Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković. "Formative evaluation of e-learning projects with the logical framework approach" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade Metropolitan Univesity (2015)