Претрага
362 items
-
A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)
... comprises coal beds, fine Miocene sands, silt and clay. 3. METHODOLOGY A hydrogeologic model is an interpretation of the dynamic and physical properties of a hydrogeologic system (American Society for Testing and Materials, 2014). According to Polomčić (2001), a hydrologic system is determined by: ...
... inter-dependent. The characteristics of a hydrogeologic system are its geometry (i.e. spatial distribution of water-bearing media) and filtration properties. Hydrogeologic modeling is schematization of the hydrogeologic system, due to the hydrogeologic and hydrodynamic complexity of the conditions, ...Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin. "A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)" in Underground Mining Engineering no. 29, Belgrade : University of Belgrade - Faculty of mining and geology (2016): 43-54
-
FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina
... certain dose of toxicity similar to parent herbicides (Hladik et al., 2006). Montmorillonite is a clay mineral widely used in various industries due to its specific physical and chemical properties, such as cation exchange capacity (CEC), large surface area, high pore volume, high swelling ability ...
... will also reduce their migration to groundwater. Certain experiments involved creating a stronger interaction between the mineral surface and the herbicide by making organo-mineral complexes. Montmorillonites previously modified with aromatic or aliphatic organic cations showed better sorption of certain ...
... ability, etc. Intercalation of organic complexes into montmorillonite layers changes surface properties from hydrophilic to hydrophobic. The results presented in this paper show that FTIR spectroscopy can be a valuable technique to examine the organic modification of montmorillonite as well as the interaction ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina" in Book of Proceedings / 3rd International and 15th National Congress Soils for Future Under Global Challenges, 21-24 September 2021 Sokobanja, Serbia , Belgrade : Serbian Society of Soil Science (2021)
-
Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
-
Површинско распадање керсантита из Тешића мајдана у корелацији са начином обраде на примеру малог степеништа (Београдска тврђава)
Невенка Новаковић (2024)Архитектуру Београда на прелазу 19. у 20. век обележила је употреба керсантита из каменолома Тешића мајдана. Kao камен високих декоративних својстава, керсантит је коришћен за јавне споменике, делове или потпуну изградњу објеката (Народна скупштина Србије, Мало степениште, Народни музеј и др.). Како очување споменика културе изискује познавање својстава уграђеног камена, истраживања су обухватила детаљно проучавање петролошких, хемијских и физичких карактеристика керсантита из Тешића мајданa и узорака камена из споменика Мало степениште (студија случаја). Након детаљног мапирања стања керсантита, лабораторијских ...керсантит, Мало степениште, споменик културе, архитектонски камен, физичко-хемијско распадање, мапирање, форме распадања, површинска обрадаНевенка Новаковић. Површинско распадање керсантита из Тешића мајдана у корелацији са начином обраде на примеру малог степеништа (Београдска тврђава), Београд : [Н. Новаковић], 2024
-
Минерагенија зеолитских туфова Србије
Vladan Kašić (2018-02-05)Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...... on acid–modified zeolitic mineral clinoptilolite. Chemical Industry63 (5), 407–414. Mercer B. W., Ames L. L., (1978): Zeolite ion exchange in radioactive and municipal wastewater treatment. In Sand L. B. and Mumpton F. A. (Eds.) Natural Zeolites, Occurrence, Properties, Use, Zeolite ’76, Tuscon ...
... redefined, The American Mineralogist, vol. 45, March-April,Am. Mineral. 45, 351-369. Mumpton, A. F., (1973): Worldwide deposits and utilisation of natural zeolites. Ind. Minerals, No.73., 30-45. Mumpton F. A. (1988): Occurrence, Properties and Utilization of Natural Zeolites. In D.Kallo and H. S ...
... испитивањима: минерали зеолита - серије хојландита, кварц, минерали глина (из групе монтморијонита), минерали фелдспата (углавном плагиокласи). Најдоминантнији минерал у узорку је минерал зеолита из серије хојландита (слика 3.6), док је садржај осталих пратећих минерала мањи. Остали минерали одређени ...Vladan Kašić. "Минерагенија зеолитских туфова Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-02-05)
-
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 ...... Annotation also alleviates the statistical analysis of the corpus, namely automatic assignment of the distribution of annotated linguistic properties. 5. APPLICATION TERMI The Termi application has recently been launched to serve as a support for the development of terminological dictionaries ...
... updating terms either only in Serbian, or only in the English, or simultaneously in both languages. Term modification implies changes of the very properties of the term (name, abbreviation, synonyms and description) as well as modification of external connections of the term with the existing b ...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)
-
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
-
Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova
Zoran M. Štirbanović (2015-07-01)Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina... Spain, Environmental Issues and Management of Waste in Energy and Mineral Production, Book, Netherlands, 2000, pp. 109-116. 83. E. E. Alonso, A. Gens, Aznalcollar dam failure. Part 1: Field observations and material properties, Geotechnique, Vol. 56, No. 3, 2006, pp. 165–183. 84. J. A. Caldwell ...
... Journal of Mineral Processing, 4, 1977, pp. 317—344. 91. S. K. Kawatra, Flotation Fundamentals, http://www.chem.mtu.edu/chem_eng/faculty/kawatra/Flotation_Fundamentals.pdf 92. V. A. Ignatkina, Selection of Selective Collectors for Flotation of Minerals with Similar Flotation Properties, Russian ...
... iskorišćenje u peni [89]. Iako određeni minerali imaju prirodnu flotabilnost [90], postupak flotacije je gotovo nemoguć bez upotrebe kolektora. Izbor odgovarajućeg kolektora je od suštinske važnosti za efikasnost procesa flotacije [91]. Pojedini minerali imaju slične osobine u pogledu flotabilnosti ...Zoran M. Štirbanović. "Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-07-01)
-
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
-
Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles
Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...... for pharmaceutical use [6, 7]. In the following years, a large number of different Ru(II) and Ru(III) compounds were studied for their cytotoxic properties, such as polypyridyl complexes cis-[Ru(N,N-bpy)2Cl2] and mer-[Ru(N,N,N- trpy)Cl3] [12, 13], aminocarboxylato complexes [Ru(N,- N,O,O-pdta)Cl2] ...
... many different ruthenium complexes have been synthesized and investigated to elucidate the relationship between the structure of inert ligands and properties of the complexes. Complexes with polypyridyl ligands [9, 28–30] and organometallic half sandwich ligands [31–37] are studied frequently in order ...
... 50-GMP[ L-His[DMSO. It was expected that thiourea has the highest reactivity toward the Ru(II) complex studied, because it combines the ligand properties of thiolates (r-donor) and thioethers (r-donor, p-acceptor) [45, 46]. However, 50-GMP reacts slightly slower than thiourea. Taking into account ...Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović. "Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles" in Monatshefte für Chemie - Chemical Monthly, Springer Science and Business Media LLC (2013). https://doi.org/10.1007/s00706-013-1044-1
-
Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking
U radu se prikazuju rezultati istraživanja vezanih za pripremu paralelnih korpusa, fokusirajući se na transformaciju u RDF grafove koristeći NLP Interchange Format (NIF) za lingvističku anotaciju. Pružamo pregled paralelnog korpusa koji je korišćen u ovom studijskom slučaju, kao i proces označavanja delova govora, lematizacije i prepoznavanja imenovanih entiteta (NER). Zatim opisujemo povezivanje imenovanih entiteta (NEL), konverziju podataka u RDF, i uključivanje NIF anotacija. Proizvedene NIF datoteke su evaluirane kroz istraživanje triplestore-a korišćenjem SPARQL upita. Na kraju, razmatra se povezivanje Linked ...paralelni korpusi, povezivanje imenovanih entiteta, prepoznavanje imenovanih entiteta, NER, NEL, povezani podaci, NIF, VikipodaciRanka Stanković, Milica Ikonić Nešić, Olja Perisic, Mihailo Škorić, Olivera Kitanović. "Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking" in Proceedings of the 9th Workshop on Linked Data in Linguistics @ LREC-COLING 2024, Turin, 20-25 May 2024, ELRA and ICCL (2024)
-
A Lexical Approach to Acronyms and their Definitions
In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.... inflectional properties of acronyms. Moreover, we intend to improve our extraction procedure in order to improve the recall and lemmatization procedure as to lem- matize successfully less frequent MWU structures. We plan to develop procedures for the detection of semantic properties of acronym-d ...Cvetana Krstev, Duško Vitas, Ranka Stanković. "A Lexical Approach to Acronyms and their Definitions" in Proceedings of the 7th Language & Technology Conference, November 27-29, 2015, Poznań, Poland, Springer (2015)
-
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%).... thesauri there are four basic types of relationships between concepts. The first type of the relations is the class-subclass relationship, it has the properties of transitivity and inheritance. The second type of the RuThes relations is the part-whole relation. An important condition for estab- lishing ...
... Dobrov, 2015). In RuThes, the part-whole relation is used not only to describe phys- ical parts, but also to other internal attributes, such as properties or roles for situations (Guarino et al., 2009). Figure 2: Relations and text entries for zero-day vulnerability concept from Sociopolitical thesaurus ...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
-
Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
-
Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction
Velislava Stoykova, Ranka Stanković (2018)Velislava Stoykova, Ranka Stanković. "Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction" in Advances in Intelligent Systems and Computing, Springer International Publishing (2018). https://doi.org/10.1007/978-3-319-91189-2_16
-
Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
-
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)... co-pyrolysis solid products have better combustion properties, as lignite has a stabilizing effect on the plastic residues morphology and prevents its melting [63]. Containing a relatively high amount of carbon (Table 3) and clay (from the lignite mineral matter [2]), the solid residues obtained by lignite/HDPE ...
... 600 ◦C under a nitrogen atmosphere. Particular attention was devoted to temperature range between 400 and 500 ◦C, concerning the thermogravimetric properties of initial lignite and HDPE, shown in Figure 1a,b, as well as the fact that coal exists in a plastic state under such conditions [34]. The lignite/HDPE ...
... explained by the presence of minor amount of oxygen in initial HDPE [42], most probably originating from additives that are intercalated to improve the properties of HDPE [80]. Further re- action of released CO2 with hydrocarbons at high temperatures (above 850 ◦C) resulted in the formation of CO, whose presence ...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
-
Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија
... (Luković и др., 2017), међутим наши експерименти за одрђивање магнети‐ чних минерала указују на другачији састав. Мерења Киријеве температуре показују да се током првог грејања могу препознати два магнетична минерала, један на 409°C, други на Киријевој тем‐ ператури магнетита, на 580°C. Код хлађења ...
... ronomical Society, 62, 699–718. Lowrie, W., 1990. Identification of feromagnetic minerals in a rock by coercitive and unblocking tempe‐ rature properties. Geophys. Res. Lett., 17, 159–162. Luković, A., Zavašnik, J., Vulić, P., Banješević, M., Šarić, K., Cvetković, V., Pačevski, A., 2017. Hemoil‐ ...
... за текто‐ нику како би сазнали да ли је издвојена магнетизација настала у време или након убирања. Експе‐ рименти за одређивање магнетичних минерала укључивали су мерење Кријеве температуре, стицање изотермалне реманентне магнетизације (ИРМ) корак по корак и корак по корак термалну дема ...Весна Лесић, Емо Мартон, Драган Лукић, Весна Цветков. "Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија" in Knjiga apstrakata 17. Kongres geologa Srbije, Vrnjačka Banja 17-20. maj 2018., Српско геолошко друштво (2018)
-
Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils
Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii... Additionally, Raman analysis was performed at a range of 100–1500 cm–1 using a DXR Raman microscope (Thermo Scientific, Waltham, MA, USA). The thermal properties were investigated using differential thermal and thermogravimetric analysis (DTA/TGA) which was performed in the tem- perature range up to 1000 ◦C ...
... ureolysis by Sporosarcina pasteurii. J. Appl. Microb. 2015, 118, 1321–1332. [CrossRef] 11. Krajewska, B.; Ureases, I. Functional, catalytic and kinetic properties: A review. J. Mol. Catal. B Enzym. 2009, 59, 9–21. [CrossRef] 12. Whiffin, V.S.; van Paassen, L.A.; Harkes, M.P. Microbial carbonate precipitation ...
... [CrossRef] [PubMed] 33. Vahabi, A.; Ramezanianpour, A.A.; Akbari Noghabi, K. A preliminary insight into the revolutionary new line in improving concrete properties using an indigenous bacterial strain Bacillus licheniformis AK01, as a healing agent. Eur. J. Environ. Civil. Eng. 2014, 19, 614–627. [CrossRef] ...Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691
-
Softverski alati za korišćenje resursa za srpski jezik
Ivan Obradović, Ranka Stanković (2008)... inflectional properties. The letter K at the beginning of the inflectional code determines the word type, or part of speech (POS), for example, N for noun, V for verb, etc., whereas nnn represents the ordinal number of the inflectional class for a particular POS. The inflectional properties of the class ...
... class. The +SinSem marks, which are not obligatory, but if present, may be multiple, describe the syntactic, semantic, derivational and other properties of the lemma. Thus, for example the noun devojka (girl) appears in the DELAS dictionary as: devojka,N618+Hum+Ek which means that devojka is a noun ...Ivan Obradović, Ranka Stanković. "Softverski alati za korišćenje resursa za srpski jezik" in INFOteka: časopis za informatiku i bibliotekarstvo, Belgrade, Serbia : Zajednica biblioteka univerziteta u Srbiji (2008)