Претрага
776 items
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Characterization of biochar surface functional groups
In this work, biochar originating from paper fibres was examined. Biochar was prepared via pyrolysis method at 550°C. Oxygen-containing functional groups on biochar surface were determined. The surface functional groups of biochar were analysed by Fourier transform infrared spectroscopy. The amount of oxygen-containing functional groups was performed with Boehm titration. The total acidity of biochar was mostly attributed to carboxylic and lactonic groups.Marija Ilić, Vesna Pavelkić, Aleksandar Lolić, Branko Leković. "Characterization of biochar surface functional groups" in Šesti Naučno-stručni skup Politehnika, Beograd, 10. decembar 2021., Beograd : Akademija tehničkih strukovnih studija (2021)
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Particulate basalt–polymer composites characteristics investigation
Todić Aleksandar, Nedeljković Blagoje, Cikara Dejan, Ristović Ivica. "Particulate basalt–polymer composites characteristics investigation" in Materials and Design no. 32, :ELSEVIER (2011): 1677-1683. https://doi.org/10.1016/j.matdes.2010.09.023
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Application of the unmanned aerophotogrammetry in monitoring conditions and changes at the open pit mines
Vujić Slobodan, Radosavljević Nenad, Milutinović Aleksandar, Gigov Mihajlo. "Application of the unmanned aerophotogrammetry in monitoring conditions and changes at the open pit mines" in Journal ”Mining and Metallurgy Engineering” no. in print, Bor:Mining and Metallurgy (2016): 1-6. https://doi.org/DOI 10.5937/MMEB160100IV
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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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Oscillatory zoning in wolframite from Osanica, near Bor, Serbia
Pačevski Aleksandar, Götzinger Michael, Dimitrijević Radovan, Cvetković Ljubomir. "Oscillatory zoning in wolframite from Osanica, near Bor, Serbia" in Neues Jahrbuch für Mineralogie - Abhandlungen 184, :E. Schweizerbart’sche Verlagsbuchhandlung (2007): 151-160. https://doi.org/10.1127/0077-7757/2007/0092
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Развој сектора природног гаса у Србији – Индикатори напретка
Ivezić Dejan, Živković Marija, Madžarević Aleksandar, Ivić Milica. "Развој сектора природног гаса у Србији – Индикатори напретка" in Енергија, економија, екологија 03-Apr no. XX, Beograd:Savez energetičara Srbije (2018): 383-391
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Assessments of effects of implementation of strategic plans for development of Belgrade District heating system
The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić. "Assessments of effects of implementation of strategic plans for development of Belgrade District heating system" in Sustainable Cities and Society, Elsevier BV (2020). https://doi.org/10.1016/j.scs.2020.102304
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Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom
U narednom periodu se planira izgradnja nekoliko desetina sistema za prečišćavanje otpadnih voda u većim gradovima u Srbiji. Iskustva iz postrojenja koja su trenutno u radu, pokazuju da bi prečišćena otpadna voda, s obzirom na protok i temperaturu, mogla da predstavlja značajan izvor obnovljive energije. U radu su prikazani primeri dobre prakse korišćenja ove energije u sistemima daljinskog grejanja u zemljama Evropske unije. Analiziran je rad postrojenja za prečišćavanje otpadnih voda u Šapcu i razmotrena je mogućnost njegovog korišćenja ...... korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Mogućnost korišćenјa toplotnih ...
... toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom | Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović | Energija, Ekonomija, Ekologija | 2021 | | 10.46793/EEE21-1.11I http://dr.rgf.bg.ac.rs/s/repo/item/0005477 Дигитални репозиторијум ...
... toplotnim izvorom Possibilities for Utilization of Waste Heat from Wastewater Treatment Plants by Heat Pumps Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović Univerzitet u Beogradu – Rudarsko-geološki fakultet Rezime - U narednom periodu se planira izgradnja nekoliko ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović. "Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom" in Energija, Ekonomija, Ekologija, University Library in Kragujevac (2021). https://doi.org/10.46793/EEE21-1.11I
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Халкантит као секундарни минерал бакра у лежишту Чока Марин, Србија
Алена Здравковић, Александар Пачевски, Предраг Дабић, Периша Живковић. "Халкантит као секундарни минерал бакра у лежишту Чока Марин, Србија" in 18. Конгрес геолога Србије "Геологија решава проблеме", Дивчибаре, 1-4. јун 2022., Српско геолошко друштво (2022)
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Environmental Noise Impact Assessment for Large-Scale Surface Mining Operations in Serbia
Noise emissions are a significant environmental impact caused by the mining industry in all technological phases of surface mining, mineral processing, and waste disposal. This paper presents the role of noise impact assessment and control in large-scale surface mining operations. Mine planning develops the model of mining operations, ore excavation, and waste dumping scheduling and processing rates, including spatial distribution of mining activities. Such a level of mine planning requires an environmental impact assessment study. This can be achieved ...Uros Pantelic, Petar Lilic, Aleksandar Cvjetic, Nikola Lilic. "Environmental Noise Impact Assessment for Large-Scale Surface Mining Operations in Serbia" in Sustainability, MDPI AG (2023). https://doi.org/10.3390/su15031798
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Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons
U ovom radu sagledana je primena hidrodinamičke analize u okviru odabrane remedijacione metode ,,pumpanja i tretiranja” kontaminiranih podzemnih voda ugljovodonicima, na primeru pretakališta rafinerije nafte u Pančevu. Primenjena hidrodinamička analiza predstavlja pravilan, a sve češće i neophodan pristup u savremenoj hidrogeologiji. Prethodnim hemijskim analizama uzoraka tla i podzemnih voda na istražno-osmatračkim objektima detektovano je zagađenje produktima nafte. Novoizvedena istraživanja obuhvatila su izvođenje 12 pijezometara različitih dubina, geoelektrično sondiranje tla, ,,in situ” merenja prisutnog kontaminanta, izdvojenog kao hidrofobna faza LNAPL, ...Predrag Pajić, Aleksandar Čalenić, Dušan Polomčić, Dragoljub Bajić. "Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2018). https://doi.org/10.5937/tehnika1706825P
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Effect of natural gas composition on methane number: A case of gas reservoirs in Serbia
Natural gas is considered as the most environmentally acceptable fossil fuel, thus it is an alternative to petroleum derivate, dominantly used in internal combustion engines. Physical properties of a fuel as well as behavior during combustion process are affected by its composition. This article presents analysis of effect of natural gas composition on methane number (MN), conducted for natural gas deposits in Serbia. For empirically determination of MN: California air resources board (CARB) method and Linear and Anstalt für ...Marija Živković, Milica Ivić, Dejan Ivezić, Aleksandar Madžarević. "Effect of natural gas composition on methane number: A case of gas reservoirs in Serbia" in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects (2017). https://doi.org/10.1080/15567036.2017.1403518
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Possibilities for Reduction of Energy-Related Air Pollution in Serbia - Exploring Energy Scenarios
Fossil fuels and biomass account for almost 93% of the total primary energy supply in Serbia. Meeting the energy needs of consumers implies a transformation of the chemical energy of fuels through combustion processes to obtain heat that can be utilized as such, or further transformed into mechanical or electrical energy. These processes have an undeniable impact on air pollution, even in cases of biofuels or hydrogen combustion. Possibilities for air pollution reduction are identified, both on the supply ...Marija Živković, Boban Pavlović, Dejan Ivezić, Aleksandar Mijatović. "Possibilities for Reduction of Energy-Related Air Pollution in Serbia - Exploring Energy Scenarios" in 9th International Conference Mining and Environmental Protection, 24.-27. May 2023, Sokobanja, Serbia, Belgrade, Serbia : University of Belgrade, Faculty of Mining and Geology (2023)
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Mineral Resources of Serbia: Environmental, Societal and Economic Challenges
... Sustainable Energy - United Nations: International Classification for Low-Rank Coals. Energy 12, 21 pp. Ercegovac, Marko, Životić, Dragana and Kostić, Aleksandar. 2006. “Genetic-industrial classification of brown coals in Serbia.” Infernafional Journal Coal Geology. 68:39-56. lancu, Viorica, Berza ...
... environments of deposition, and types. Faculty of Mining and Geology, Belgrade, 760 pp (in Serbian, with a summary in English). Jelenković Rade, Kostić Aleksandar, Životić, Dragana and Ercegovac, Marko. 2008. “Mineral resources of Serbia.” Geologica Carpatica 59, 4:45—361. Jelenković, Rade and Mijatović ...
... volcano-sedimentary sequences (Dimitrijević 1997). 19' 20 PAN 22' ii || ii ii \š\L Legend: N \“C· S.— || IćA • 46' — — 77 Subotica Ž M – |::::zk) \\ 774 ž Pannonian z= 5\3 basin (OS _ L (J„„;//;„N«·»_·Sau > š.z'n':j FW&L \ a 4* |MN ___ ) m ~— fš \7 Belgrade { __ Q/ —~ k F w N ...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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Идејно решење заштите површинског копа ,,Дрмно" од вода у периоду од 2030. године до краја експлоатације
Јован Киселчић (2024)Системи одводњавања на површинским коповима као и други технички системи морају успешно извршавати своју функцију и са свим својим елементима издржавати сва предвиђена напрезања,а при томе бити једноставни и економични.Функција система одводњавања је да спречи доток, пре свега, подземних вода у површински коп и да у одређеном времену испумпа задате количине воде.У овом раду приказани системи одводњавања на површинском копу ,,Дрмно" у периоу од 2023.године до краја експлоатације и то систем одводњавања подземних вода и систем одводњавања површинских вода.На ...... JMpe2/ce. 33 CeBep i. smar_o a m m e e m -m Mo. a - m -e _ — . » _ i :: Sanman | Ž Hcrok »| H .H “ + w wa| H +| BR H “ Targat |1 ws MeMa, M FlowBamer Z ”“ IHHE NoFlow i 1000 Meters ž || tttv Jyr Cnuka 3.1.1. /{uckpemusauuja npocmopa o6yxaaheHo2 MooeJnoM y naaHy ...
... eraxxnBx Kanajma yKyrne nyoxuaHe 13.420 m, norpe0uo je orkonaru 31.966 mž MarepHjana, JNOK je 3a M3pamy 5 BomocaOMpHuMka morTpeOHo orkomaru 132.620 m?ž MarTepHjaja. y 2033. romanu saamruTa Kora 0J1 IIOBpIIHHCKHX BOJIa CaCTOJH Ce H3 7 eTa)KHHX KaHajma H 4 nonocaOupHuka. UeTHpu eraxxHa KaHajla Cy ...Јован Киселчић. Идејно решење заштите површинског копа ,,Дрмно" од вода у периоду од 2030. године до краја експлоатације, 2024
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Satelitska navigaciona telemetrija u funkciji daljinskog nadzora i upravljanja rudničkim proizvodnim kompleksima
Slobodan Vujić, Miljanović Igor, Tomo Benović, Milutinović Aleksandar, Svetomir Maksimović, Aleksandar Petrovski, Josipović Pejović Milena, Čebašek Vladimir, Dimitrijević Bojan (2010)Slobodan Vujić, Miljanović Igor, Tomo Benović, Milutinović Aleksandar, Svetomir Maksimović, Aleksandar Petrovski, Josipović Pejović Milena, Čebašek Vladimir, Dimitrijević Bojan. "Satelitska navigaciona telemetrija u funkciji daljinskog nadzora i upravljanja rudničkim proizvodnim kompleksima" in MonografijaRudarstvo u privredi i razvoju Republike Srpske 1, Prijedor, Republika Srpska:Rudarski fakultet Prijedor (2010): 66-76
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Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe) 3-deltaO 4 nanoparticles
Antić Bratislav, Kremenović Aleksandar, Jović Nataša, Pavlović Miodrag B., Jovalekić Čedomir, Nikolić Aleksandar S., Goya Gerardo F, Weidenthaler Claudia (2012)Antić Bratislav, Kremenović Aleksandar, Jović Nataša, Pavlović Miodrag B., Jovalekić Čedomir, Nikolić Aleksandar S., Goya Gerardo F, Weidenthaler Claudia. "Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe) 3-deltaO 4 nanoparticles" in Journal of Applied Physics 7 no. 111, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA:American Institute Physics (2012). https://doi.org/10.1063/1.3700228
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Integrisano okruženje za pripremu paralelizovanog korpusa
Razvoj paralelizovanih korpusa zahteva pripremu paralelnih tekstova za njihovu integraciju u paralelizovani korpus. Reč je o jednom kompleksnom zadatku koji se može rešiti na različite načine, i koji mora da se odvija u nekoliko koraka. U ovom radu najpre je iznet postupak pripreme paralelnih tekstova za paralelizovani korpus koji se koristi u Grupi za jezičke tehnologije Univerziteta u Beogradu. Potom je dat kratak pregled programa (XAlign, Concordancier, WS4LR), odnosno softverskih alata koji se pri tome koriste. Nedostatak udobnog okruženja ...... jedinicama uparivanja. Izgled jednog takvog dokumenta koji sadrži paralelizovan tekst romana “Starac i more” u tzv. Aurora zapisu, u kome su slova ć, č, š ,ž ,đ, dž, lj i nj kodirana ACCII karakterima cx, cy, sx, zx, dx, dy, lx i nx, prikazan je na slici 8. Slika 8. Razlaganje TMX dokumenta Poslednji korak ...Ivan Obradović, Ranka Stanković, Miloš Utvić. "Integrisano okruženje za pripremu paralelizovanog korpusa" in Zbornik radova međunarodnog simpozijuma Razlike između bosanskog/bošnjačkog, hrvatskog i srpskog jezika, Graz, Austria, April 2007, - (2007)
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Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report
Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić (2021)Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić. "Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2021). https://doi.org/10.1007%2F978-3-030-60196-6_19
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Part of Speech Tagging for Serbian language using Natural Language Toolkit
Ranka Stanković, Boro Milovanović (2020)Dok se razvijaju složeni algoritmi za NLP (obrada prirodnog jezika), osnovni zadaci kao što je označavanje ostaju veoma važni i još uvek izazovni. NLTK (Natural Language Toolkit) je moćna Python biblioteka za razvoj programa zasnovanih na NLP-u. Pokušavamo da iskoristimo ovu biblioteku za kreiranje PoS (vrsta reči) oznake za savremeni srpski jezik. Jedanaest različitih modela je kreirano korišćenjem NLTK API-ja za označavanje. Najbolji modeli se transformišu sa Brill tagerom da bi se poboljšala tačnost. Obučili smo modele na označenom ...... Large-Coverage Finite-State Resources”, Proc. 7th Language and Technology Conference (LTC), Poznan, Poland, Nov. 2015 [8] N. Ljubešić, F. Klubička, Ž. Agić, and I. Jazbec, “New inflectional lexicons and training corpora for improved morphosyntactic annotation of Croatian and Serbian“, Proc. 10th ...Ranka Stanković, Boro Milovanović. "Part of Speech Tagging for Serbian language using Natural Language Toolkit" in 7th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2020, Academic Mind, Belgrade (2020)