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926 items
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The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)
... when both the tunnel and the hydrogeologic environment were under the influence of the pressure of the transported water (Figure 5). In the full operating mode of the HPP (4–5 h/day), at PP-3 the transport of water relieved the pressure not only in the tunnel but within the hydrogeologic environment as ...
... PP-3 and PP-4, were deep-drilled along the tunnel and the screens installed within the tunnel zone. The HPP has a gravity dam and is usually operated 4–5 h/day. Surface water reservoir is located at an elevation of 612 m, occupies an area of 5.53 km and has a total volume of 170 × 106 m3. č Figure ...
... J1 2+3). However, these changes are also indicative of the hydraulic behavior of the tunnel and the hydrogeologic environment. Water 2019, 11, 603 5 of 10 Δ Figure 3. (a) Comparative plots of groundwater levels in observation wells PP-1 and PP-3, (b) Comparative plots of groundwater levels in ...Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov. "The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)" in Water, MDPI AG (2019). https://doi.org/10.3390/w11030603
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Uticaj proširenja nuklearne elektrane “Pakš” (Mađarska) na resurse podzemnih voda u Vojvodini
Bojan Hajdin, Dušan Polomčić (2016)... model [3]. U zavisnosti od dužine bunarskog niza, prema rezultatima istraživanja, na obe lokacije moguće je dobiti ukupno do 2 m3/s vode (slika 5). Slika 5 - Bunarski niz na lokacijama Budžak (gore) i Mesarske livade (dole), kod Apatina [3] Prema modelskim ispitivanjima, prihranjivanje izdani, primarno ...
... Uticaj proširenja nuklearne elektrane “Pakš” (Mađarska) na resurse podzemnih voda u Vojvodini | Bojan Hajdin, Dušan Polomčić | Tehnika | 2016 | 66 | 5 10.5937/tehnika1604545H http://dr.rgf.bg.ac.rs/s/repo/item/0003008 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава ...
... nakon vađenja iz reaktora ima- ju vrlo visok nivo radioaktivnosti i visoku temperaturu zbog čega se prvo smeštaju u bazen za hlađenje, gde ostaju 3-5 godina, a najviše 10. Nakon toga se pre- meštaju u “privremeno skladište”, gde prema projektu ostaju do završetka rada NE, 2085. godine. Oba skladišta ...Bojan Hajdin, Dušan Polomčić. "Uticaj proširenja nuklearne elektrane “Pakš” (Mađarska) na resurse podzemnih voda u Vojvodini" in Tehnika 66 no. 5, Beograd : Savez inženjera i tehničara (2016): 777-786. https://doi.org/10.5937/tehnika1604545H
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Синтеза и карактеризација керамике на бази сфена
Jelena R. Pantić (2015-07-10)Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори... (Å) * 8,70 8,705(1) 8,723(5) 8,722(5) 8,681(4) c (Å) * 6,55 6,553(1) 6,567(5) 6,566(8) 6,539(2) β (Å) * 113,95 113,82(1) 113,86(3) 113,86(2) 113,90(3) Запремина јединичне ћелије (Å3) * 370 368,49(6) 370,12(5) 370,22(6) 365,88(5) Просторна група A2/a (C2/c) A2/a P21/a P21/a P21/a Израчуната ...
... Јелена Пантић 5 Табела 2.1.1. Литературни кристалографски подаци за сфен. Zachariasen (1930) Mongiorgi et Riva di Sanseverino (1968) Robbins (1968) Speer et Gibbs (1976) Hollabauh et Foit (1984) a (Å) * 7,06 7,062(1) 7,065(5) 7,069(2) 7,050(3) b (Å) ...
... Сфен из амфиболита (Каслов), 4. Сфен из пегматита (Абисинија), 5. Сфен из родингита (Пакистан), 6. Сфен из гнајса (Гренланд), 7. Сфен из песка (Нови Зеланд), 8. Сфен из метаморфне стене (Финска) (Zussman et al, 1962). 1 2 3 4 5 6 7 8 SiO2 30,44 30,03 31,27 29,32 28,45 30,59 30,35 30,32 TiO2 ...Jelena R. Pantić. "Синтеза и карактеризација керамике на бази сфена" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-10)
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Синтеза и карактеризација керамике на бази сфена
Jelena R. Pantić (2015-07-10)Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори... (Å) * 8,70 8,705(1) 8,723(5) 8,722(5) 8,681(4) c (Å) * 6,55 6,553(1) 6,567(5) 6,566(8) 6,539(2) β (Å) * 113,95 113,82(1) 113,86(3) 113,86(2) 113,90(3) Запремина јединичне ћелије (Å3) * 370 368,49(6) 370,12(5) 370,22(6) 365,88(5) Просторна група A2/a (C2/c) A2/a P21/a P21/a P21/a Израчуната ...
... Јелена Пантић 5 Табела 2.1.1. Литературни кристалографски подаци за сфен. Zachariasen (1930) Mongiorgi et Riva di Sanseverino (1968) Robbins (1968) Speer et Gibbs (1976) Hollabauh et Foit (1984) a (Å) * 7,06 7,062(1) 7,065(5) 7,069(2) 7,050(3) b (Å) ...
... Сфен из амфиболита (Каслов), 4. Сфен из пегматита (Абисинија), 5. Сфен из родингита (Пакистан), 6. Сфен из гнајса (Гренланд), 7. Сфен из песка (Нови Зеланд), 8. Сфен из метаморфне стене (Финска) (Zussman et al, 1962). 1 2 3 4 5 6 7 8 SiO2 30,44 30,03 31,27 29,32 28,45 30,59 30,35 30,32 TiO2 ...Jelena R. Pantić. "Синтеза и карактеризација керамике на бази сфена" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-10)
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Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules
The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analizaSvetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón . "Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules" in Bulletin of Engineering Geology and the Environment , Springer (2024). https://doi.org/10.1007/s10064-024-03667-0
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A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment
Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...... ue nc y 1 5 10 50 100 500 1 2 3 4 5 >5 Basque Bulgarian Danish Dutch English (KD) English (NUIG) Estonian German Hungarian Irish Italian Serbian Slovenian (JSI) Slovenian (ISJFR) Spanish Portuguese Russian Number of senses Fr eq ue nc y 1 5 10 50 100 500 1 2 3 4 5 >5 Basque Bulgarian ...
... scribed our methodology in Section 3, we further elaborate on the challenges of sense annotation in Section 4. We eval- uate the datasets in Section 5 and finally, conclude the paper in Section 6. 2. Related work Aligning senses across lexical resources has been attempted in several lexicographical ...
... speech (given in parentheses after the headword); • The sense text (definition) in the first resource; • An interactive drop-down to specify one of the 5 se- mantic relations (see below) from the sense in the first resource; • The sense text (abbreviated) in a drop-down list from the second resource ...Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others . "A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment" in Proceedings of the 12th Conference on Language Resources and Evaluation (LREC 2020), Marseille, European Language Resources Association (ELRA) (2020)
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Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+
In this study, a new cobalt arsenate belonging to the alluaudite supergroup compounds with the general formula of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H, )0.5(H2O,H3O)0.5]2x+ (denoted as CoAsAllu) was synthesized under hydrothermal conditions. Its crystal structure was determined by a room-temperature single-crystal X-ray diffraction analysis: space group C2/c, a = 11.6978(8), b = 12.5713(7), c = 6.7705(5) Å, b = 113.255(5)◦, V = 914.76(11) Å3, Z = 2 for As6H8Co6O25. It represents a new member of alluaudite-like protonated arsenates and the first alluaudite-like phase ...супергрупа алуаудита, арсенати прелазних метала, хидротермална синтеза, кристална структура, хидратисани хидрокси-арсенати, стехиометрија, магнетна својстваTamara Đorđević, Ljiljana Karanović, Marko Jagodič, Zvonko Jagličić. "Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11121372
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An example of karst catchment delineation for prioritizing the protection of an intact natural area
Vesna Ristić Vakanjac, Zoran Stevanović, Aleksandra Maran Stevanović, Boris Vakanjac, Marina Čokorilo Ilić (2015)Проучавано је карстни извор Перућац као главни дрен подручја планине Таре у западној Србији у циљу процене његовог режима отицања, резерви воде и дефинисања његове сливне површине. Извор се налази у североисточној, унутрашњој зони класичног динарског крша, коју карактерише доминантно проширење висококарстификованих тријаских кречњака, слабо развијена хидрографска мрежа са много понора и густе шуме. Тара је један од пет националних паркова у Србији. Циљ рада је био да се идентификује заштитна зона високог приоритета у оквиру очуваног природног подручја ...Vesna Ristić Vakanjac, Zoran Stevanović, Aleksandra Maran Stevanović, Boris Vakanjac, Marina Čokorilo Ilić. "An example of karst catchment delineation for prioritizing the protection of an intact natural area" in Environmental Earth Science (2015). https://doi.org/10.1007/s12665-015-4390-y
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Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija
Srđan D. Kostić (2013-11-04)U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja... tačka predstavlja tačku-sedlo bez obzira na znak parametra τ (slika 5-5). Geometrijsko mesto ovih fiksnih tačaka ograničeno je pravom Δ=0, i obuhvata celu poluravan određenu sa Δ<0. 56 Slika 5-5. Tip fiksne tačke za Δ<0, kada su sopstvene vrednosti različitog znaka (tačka- ...
... nestanka fiksnih tačaka, pri promeni vrednosti kontrolnog parametra (slika 5-1a); o transkritična bifurkacija – u ovom slučaju dolazi do pojave, spajanja i ponovnog razdvajanja fiksnih tačaka (slika 5-1b); Slika 5-1. (a) sedlo-čvor bifurkacija; (b) transkritična bifurkacija. o vilasta ...
... gubi stabilnost, uz formiranje dve nove stabilne fiksne tačke (slika 5-2a); o potkritična vilasta bifurkacija, kada fiksna tačka gubi stabilnost, uz nestajanje dve nestabilne fiksne tačke (slika 5-2b). 53 Slika 5-2. (a) natkritična vilasta bifurkacija; (b) potkritična vilasta bifurkacija ...Srđan D. Kostić. "Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-04)
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Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija
Srđan D. Kostić (2013-11-04)U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja... tačka predstavlja tačku-sedlo bez obzira na znak parametra τ (slika 5-5). Geometrijsko mesto ovih fiksnih tačaka ograničeno je pravom Δ=0, i obuhvata celu poluravan određenu sa Δ<0. 56 Slika 5-5. Tip fiksne tačke za Δ<0, kada su sopstvene vrednosti različitog znaka (tačka- ...
... nestanka fiksnih tačaka, pri promeni vrednosti kontrolnog parametra (slika 5-1a); o transkritična bifurkacija – u ovom slučaju dolazi do pojave, spajanja i ponovnog razdvajanja fiksnih tačaka (slika 5-1b); Slika 5-1. (a) sedlo-čvor bifurkacija; (b) transkritična bifurkacija. o vilasta ...
... gubi stabilnost, uz formiranje dve nove stabilne fiksne tačke (slika 5-2a); o potkritična vilasta bifurkacija, kada fiksna tačka gubi stabilnost, uz nestajanje dve nestabilne fiksne tačke (slika 5-2b). 53 Slika 5-2. (a) natkritična vilasta bifurkacija; (b) potkritična vilasta bifurkacija ...Srđan D. Kostić. "Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-11-04)
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Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)... hydrocarbons in lignite/HDPE pyrolysates are higher than the theoretical ones at temperatures ≥450 ◦C, where the synergetic effect was observed (Table 5). Table 5. Bulk composition of lignite extractable organic matter (EOM) and the liquid pyrolysis products (%, wt.) obtained in open system pyrolysis. Sample ...
... Improve Utilization of Low-Rank Coal Ivan Kojić 1 , Achim Bechtel 2 , Nikoleta Aleksić 3, Dragana Životić 3, Snežana Trifunović 4, Gordana Gajica 5 and Ksenija Stojanović 4,* ���������� ������� Citation: Kojić, I.; Bechtel, A.; Aleksić, N.; Životić, D.; Trifunović, S.; Gajica, G.; Stojanović ...
... 12-16, 11000 Belgrade, Serbia; ivankojic@chem.bg.ac.rs 2 Department of Applied Geosciences and Geophysics, Montanuniversität Leoben, Peter-Tunner-Str. 5, A-8700 Leoben, Austria; achim.bechtel@outlook.de 3 Faculty of Mining and Geology, University of Belgrade, Ðušina 7, 11000 Belgrade, Serbia; nikoleta ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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A Mathematical Learning Environment Based on Serbian Language Resources
In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...... courses under a Moodle platform [3] [4]. There are several projects reported which are similar to MLES. Three interesting systems are presented in [5],[6]. MMT is a system that includes the theory graphs as the modular representation paradigm for mathematical knowledge. MathHub.info is an archive ...
... mathematical content. One of the most important parts in processing mathematical content is semantic search of mathematical formulae. According to [5], [6] there are several challenges in searching and processing mathematical formulae, the main problem being different notation depending on the ...
... candidates for termbases, their lemmatization and assignment of inflectional classes. There were 2,900 MWE candidates extracted with a frequency over 5, covering 46,000 different forms. An example of a MWE is “diferencijalno-algebarska jednačina” (differential-algebraic equation), represented in ...Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan. "A Mathematical Learning Environment Based on Serbian Language Resources" in Proceedings of the 7th International Scientific Conference Technics and Informatics in Education, Faculty of Technical Sciences, Čačak (2018)
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Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US
Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...... G0:-Bo-B5o:BeB: - Q e q RRRR RRRGSKSSSGSGSGS lss Total electricity generation u Flectricity generation from coal —Coal [%] Figure 5. US electricity production [5, 6| 3. CO-» emissions EU-27 has 193 active coal-fired thermal power plants, with 480 thermal units. The total installed capacity ...
... coal-fired power plants of the total installed capacity, and in the EU-27 there are 19.8% of coal-fired power plants of the total installed power [5]. The coal production in EU-27 and US in last three decade is shown in Figure 1. About 495 million tons of coals were consumed in the US, that is around ...
... 1063,0 1000,0 800,0 600,0 —-US MIN: 485,7 400,0 109 MIN: 480,5 200,0 FI IIIR FIFIIFIFFIFSFIEIEIISIIITIIIEI sagašasBssBRBBZBBB8 985889535%5%5855852SSSR geaeaggBggBEgag8B8B88888883BSSSBSSBBBBBaSBS čgBB BBB BB B RRRR RSRRRRRRRSRSSSSSE Figure 1. Coal production in EU-27 and US At one time ...Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić. "Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US" in International Conference on Global Energy and Climate Change - ICGRECC-23, New York, 2023, Research Galery- Science Leagues (2023)
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Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental ChemistryLjiljana Vasić, Laszlo Palcsu, Huang Fen. "Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8294-0
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Valorization of non-balanced coal reserves in Serbia for underground coal gasification
David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...... Exothermic reactions (at f > 600 "C) are predominantly occurring in UCG process, and the resulting gas mixture can contain 8-20% CO», 5-20% CO, 10-20% H», and 2-5% CHoa. Ifthe gas mixture contains too much CO., and possibly water vapor, the UCG gas (syngas) can Petrović, D. T., et al.: Valorization ...
... Serbian), Pro- ceedings, International Conference EEI 2018., Belgrade, Serbia, 2018, pp. 65-73 5] Greeg, D. W., et. al.. Underground Coal Gasification, 4merican Institute of Chemical Engineers, 24 (1978), 5, pp. 753-781 6| Burton,E. F. Best Practices in Underground Coal Gasification, Lawrence Livermore ...
... 75 75 i 75 H ' · H I Drilling -—Q - and preparing || ' Row5 _ ć____ O—- Boreholes ! Figure 2. Plan view of the grid between boreholes [5] burned textile soaked with petroleum could be used by throwing it into the injection borehole under the pressure of the gasifica- tion agent ...David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić. "Valorization of non-balanced coal reserves in Serbia for underground coal gasification" in Thermal Science (2019). https://doi.org/10.2298/TSCI190725390P
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Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања
Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић. "Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања" in Записници Српског геолошког друштва (2023)
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Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу
Милана Мичета (2024)Подземне воде представљају изузетно важан природни ресурс, као и важну компоненту система, којим је представљено тло. У складу са тим, приликом пројектовања плитких темеља на крупнозрном тлу, односно приликом анализе граничне носивости и слегања, треба узети у обзир и утицај воде. Верује се да ниво подземне воде значајно смањује носивост тла, док се слегања значајно повећавају. Terzaghi (1943) је први сугерисао да се потапањем масе тла, његова носивост смањује за половину, док се слегање удвостручује. Циљ овог рада је ...... HcrpaxxHe OymroTHHe 5-9 HME H IIpe3HMe: pa3Mepa: ripHnor 0p: MunaHa Muuera, [615/21 1:100 3.1 I eogMxxebepunr ajt Himr TEOJIOHTHIKH IIPOODHJI HCTPA?)KHE 5VIHOTHHE 5-20 JIokanuja: HopBu Cajt - HaceJbe IHIatraj O0jekar: TE Honu Cajt 2 KoopjuHarTe: x)7 411 565.86 y) 5 016 127.65 ZlaryM ...
... acrpaxxkHe OymorTHHe 5-20 HME H IIpe3HMe: pasMepa: ripHmor 0p: MunaHa Muuera, T615/21 1:100 3.2 I eogMxxebepunr ajt Himr TEOJIOLHIKH IIPOODHJI HCTPA)KHE 5YIIOTHHE 5-36 JIokanuja: HopBu Cajt - HaceJbe IHIatraj O0jekar: TE Honu Cajt 2 KoopjuHare: x) 7411 597.03 y)5 016 193.96 z) 76.970 ...
... Al+MI+R1 A2+M2+R2 DA-2 A1+M1+R2 DA-3 (A1* azmm A2*)+M2+R3 IIapruijannu (bakropH curypHocTH 3a HipojeKTHH rpucTyr 3 cy npHkKa3aHH y Ta0emn 5. Ta6ena 5 - Ilapuyujannu akmopu cuzeypaocmu 3a npojekmuau npucmyn 3 IIpojeKkTHu npucryn 3 (A1+M2+R3) (pakropu e(pekra nejcrBa HEHOBOJbHO l.35 CranHo ...Милана Мичета. Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу, 2024
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Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...... the relevance of retrieved documents after the search has been com- pleted.5 Figure 5 depicts the evaluation panel: when the query and the search Fig. 5. The web panel for evaluation of retrieved documents by different methods. 5 Available at http://geoliss.mre.gov.rs/fodibevaluacija/. A u t h o r ...
... ∆(k) is the change in the recall from item k − 1 to item k. The comparison of all applied methods for 5 queries for which the initial method achieved better results is given in Fig. 8 (Table 4).AQ3 Table 5 depicts a set of queries in which a moderate improvement has been achieved in comparison to the initial ...
... P r o o f 20 R. Stanković et al. Fig. 9. Comparison of all indexing methods for queries in Table 5. Fig. 10. Comparison of all indexing methods for queries in Table 7. results (e.g. first 5, 10, 20, etc.) is also often taken into account, as users often look only at the certain number of best ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8
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Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin
Joni prelaznih metala u kombinaciji sa različitim ligandima nude veliki broj mogućnosti za ispitivanje potencijalnih bioaktivnosti. Među jonima prelaznih metala, bakar je poznat kao endogeni metal za ljude, sa karakterističnim biološkim redoks aktivnostima i relativno jakim afinitetom za nukleobaze. Kompleksi bakra ispoljavaju svoju antitumornu aktivnost na nekoliko različitih načina, generišu veliku količinu ROS, što uzrokuje oksidativno oštećenje mitohondrija i biomakromolekula. Nađeno je da kompleksi bakra(II) imaju umeren do dobar afinitet vezivanja sa DNK, uglavnom putem interkalacije.Angelina Petrović, Aleksandar Mijatović, Rada Baošić, Jovana Bogojeski. "Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin" in 6. Konferencija mladih hemičara Srbije, Srpsko hemijsko društvo (2018)