Претрага
668 items
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Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera
Aleksandra B. Kolarski (2016-08-25)Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave... Jaugey, N., Thomas, J. N., Solorzano, N. N., Sao Sabbas, F., Holzworth, R. H., Pinto, O., Schuch, N. J. (2008). Rare measurements of a sprite with halo event driven by a negative lightning discharge over Argentina, Geoph. Res. Lett., 35 (L14812), doi:10.1029/2008GL033984. Thomson, N. R., Clilverd ...
... 8 kHz (27.2 S; 114.98 E), DHO/23.4 kHz (53.08 N; 7.62 E), ICV/20.27 kHz (40.92 N; 9.73 E), HWU/18.3 kHz (46.71 N; 1.24 E), FTA/20.9 kHz (48.54 N; 2.58 E) and NDT/22.2 kHz (32.08 N; 130.83 E) to the Belgrade receiver have been considered. These VLF data sets have been related to two other independent ...
... Belgrade (44.85 N; 20.38 E). The effects of induced ionization changes have been observed along different propagation paths, between a selected transmitter and the Belgrade receiver. VLF data from transmitters NAA/24.0 kHz (44.63 N; 67.28 W), GQD/22.1 kHz (54.72 N; 2.88 W), NWC/19.8 ...Aleksandra B. Kolarski. "Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)
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Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije
Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacijaJelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar. "Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Using Lexical Resources for Irony and Sarcasm Classification
The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...... some are not, and point out that the best results were obtained with two independent patterns, marked as Plauдh = (LOL|AH |EMO+)4 and Pquote = (AD J |N ){1, 2} leading to irony detection precision of 85.4% and 68.3%, respectively. In research described in [29] five linguistic patterns were suggested for ...
... [2], [15]. In a series of papers,5 a collection of ironic tweets was 3In this and following examples ADJ stands for an adjective, ADV for an adverb and N for a noun. 4AH– onomatopoeic utterances (ah,eh, hi), EMO – a set of emoticons depicting positive feelings, LOL – acronym for Laughing out Loud 5SemEval ...
... language classification was performed, the total number of tweets that we used for further analysis was the sum of true positives and false negatives (tp+ f n), which amounted to a total of 1,903 tweets. In the last step, we have made corrections to the set of tweets obtained in this way. In tweets in Serbian ...Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković. "Using Lexical Resources for Irony and Sarcasm Classification" in Proceedings of the 8th Balkan Conference in Informatics (BCI '17), New York, NY, USA, : ACM (2017). https://doi.org/
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SrpELTeC: A Serbian Literary Corpus for Distant Reading
U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analyticsRanka Stanković, Cvetana Krstev, Duško Vitas. "SrpELTeC: A Serbian Literary Corpus for Distant Reading" in Primerjalna književnost, Research Centre of the Slovenian Academy of Sciences and Arts (2024). https://doi.org/10.3986/pkn.v47.i2.03
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Integrisanje heterogenih leksičkih resursa
Osnovna aktivnost Grupe za obradu prirodnih jezika na Matematičkom fakulteta Univeziteta u Beogradu je usmerena na razvoj različitih resursa za obradu srpskog jezika. Među njima su posebno značajni sistem morfoloških rečnika srpskog jezika razvijenih u okviru mreže RELEX [1] i semantička mreža (tipa wordnet) za srpski jezik razvijena u okviru međunarodnog projekta Balkanet. Radi se o dva heterogena leksička resursa, razvijena na osnovu sasvim različitih modela, koji samim tim sadrže i različite vrste leksičkih informacija. Integracijom ovih resursa, informacije ...... oznake u DELAS zapisima omogućavaju formulisanje kompleksnih upita u Intex okruženju. Korišćenje Intex-ovih regularnih izraza (<N+MusicInst>* ) + ( * <N+MusicInst>) (imenica označena kao muzički instrument u bilo kom obliku) omogućava, na primer, dobijanje iz tekta svih rečenica ...
... A1+Pos+Ek_N=4ka (2) devojka,N618+Hum+Ek_A=2cyin Informacije koje se nalaze iza podvlake u pridevu devojcyin (A) povezuju ga sa imenicom devojka (N) tako što se poslednja četiri karaktera (cyin) zamene slovima ka. U drugom redu pokazano je kako se, na sličan način, imenica devojka povezuje sa ...
... koji su elementi povezani jedni sa drugim, načinu na koji su atributi povezani sa elementima, itd. Na primer, sledeći XPath izraz //SYNSET[POS='n' and not(ILR/TYPE='hypernym')] (10) iz XML dokumenta koji predstavlja wordnet sa XSD šemom sa slike 3 izdvaja sve imenice koje nemaju hiperonim ...Ranka Stanković, Cvetana Krstev, Duško Vitas, Ivan Obradović, Gordana Pavlović-Lažetić. "Integrisanje heterogenih leksičkih resursa" in Festivalski katalog 11. Festivala informatičkih dostignuća INFOFEST 2004, 26th September - 2nd October, 2004, Budva, Montenegro, INFOFEST (2004)
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Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs
Saša Milanović, Ljiljana Vasić (2021)Saša Milanović, Ljiljana Vasić. "Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs" in Hydrogeology Journal, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10040-020-02280-1
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Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal
Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo... Elemental analyses of samples were performed on a Vario EL III C, H, N, S/O Elemental Analyzer (Elementar, Langenselbold, Germany). The amounts of C, N and H were determined directly while the amount of oxygen was calculated as: 100%–ash%–C%–N%–H%. The adsorption/desorption isotherms of activated carbons ...
... organic C, N, O and H in glucose and fructose samples obtained after hydrothermal treatment and activation with different hydroxides were determined by elemental analysis and the results are listed in Table 1. Table 1. Elemental analysis of the glucose and fructose activated carbons. Sample N C H Ash ...
... Projects III45005, III45012, 172015, TR34013. Conflicts of Interest: The authors declare no conflict of interest. References 1. Vukojević Medvidović, N.; Perić, J.; Trgo, M. Column performance in lead removal from aqueous solutions by fixed bed of natural zeolite-clinoptilolite. Sep. Purif. Technol ...Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović . "Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal" in Minerals, MDPI (2018)
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Nonequilibrium athermal random-field Ising model on hexagonal lattices
Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević. "Nonequilibrium athermal random-field Ising model on hexagonal lattices" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.032147
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Against the tide: southeast to northwest shelf-edge progradation in the southeastern margin of Lake Pannon, Banat (Serbia and Romania)
In the late Neogene, the Pannonian Basin in Central Europe was filled with sediments when rivers from the Alps and Carpathians shed their sediment load into Lake Pannon. The most powerful source-to-sink system was that of the paleo-Danube, transporting sediments from the NW as far as the southeastern part of the lake. In the southeastern margin of the basin, however, local sedimentary systems worked in the opposite direction, against the “tide” of the prevailing N to S sediment transport. ...Dejan Radivojević, Miloš Radonjić, Lajos Tamás Katona, Imre Magyar. "Against the tide: southeast to northwest shelf-edge progradation in the southeastern margin of Lake Pannon, Banat (Serbia and Romania)" in International Journal of Earth Sciences, Springer Science and Business Media LLC (2022). https://doi.org/10.1007/s00531-022-02188-z
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In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge
Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić (2023)The biological activity of six structurally similar tetradentate Schiff base copper(II) complexes, namely [Cu(ethylenediamine-bis-acetylacetonate)] (CuAA) and five derivatives where two methyl groups are replaced by phenyl, (CuPP), CF3 (CuTT) or by mixed groups CH3/CF3 (CuAT), Ph/CF3 (CuPT), and Ph/CH3 (CuAP) has been investigated. The set of antioxidant assays was performed, and the results were expressed as IC50 and EC50 values. The series of complexes showed interesting bioactivity and were investigated for the determination of antioxidant, antifungal, antimicrobial, and cytotoxic ...Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić. "In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge" in Journal of Inorganic Biochemistry, Elsevier BV (2023). https://doi.org/10.1016/j.jinorgbio.2023.112224
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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 ...... calculating the acceptable indicator idfk of term value as a document discriminator as log(N/dfk) (lnc ltc algorithm uses for ltc expression idf1k = log((N + 1)/dfk)), (c) nidfk = idfk/ log(N), (d) idf okapi = log((N − dfk + 0.5)/(dfk + 0.5)); 6. Calculating the document vector combined measure: (a) tf ...
... following steps: 1. Generating a text (Di) from records and fields of the project summary related to a particular project document, where i = 1, . . . N and N is the size of the document collection; 2. Lemmatizing and POS tagging of all Di texts; 3. Recognizing NEs and assigning the chosen types to documents; ...
... continuous enrichment of e-dictionaries. In the columns of Table 4 the Average Precision AP = ∑n k=1 P (k)∆(k) is given for queries in Table 3 using the current system and all indexing methods except tfc tfc, where n = 50 is the number of retrieved documents, P (k) is the precision in the intersection point ...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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A tool for identifying the criticality in the disordered systems with metastable dynamics
Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević. "A tool for identifying the criticality in the disordered systems with metastable dynamics" in Physica A: Statistical Mechanics and its Applications, Elsevier BV (2021). https://doi.org/10.1016/j.physa.2021.125883
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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm
Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering... the Impact Explanation Unit 1-Čantavir east (46 wind turbines) T o r ed u ce e xp o su re o f th e p o p u la ti o n t o i n cr ea se d n o is e le v el s 0 In units 1 and 2 no increase in the level of noise above LVNI is expected, either for the day/evening, or for ...
... Tour. Anal. 2014, 2, 5–18. 10. Krunić, N.; Josimović, B.; Gajić, A.; Nenković-Riznić, M. Territorial analysis as support to the strategic environmental assess- ment process for agro-waste management planning. Spatium 2019, 42, 16–22. 11. Josimović, B.; Krunić, N.; Gajić, A.; Manić, B. Multi-criteria ...
... measurements. Appl. Acoust. 2016, 104, 152–157. 23. Zhang, Y.; Tang, N.; Niu, Y.; Du, X. Wind energy rejection in China: Current status, reasons and perspectives. Renew. Sustain. Energy Rev. 2016, 66, 322–344. 24. Maslov, N.; Claramunt, C.; Wanga, T.; Tanga, T. Method to estimate the visual impact ...Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić. "Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm" in Energies, MDPI AG (2021). https://doi.org/10.3390/en14196174
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BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties
Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition... 400 500 600 t["C] 20 . LAA 1300 •C 16| c ~_ A 14 a | _ r O O " = sl RuHENNEBRNRA | * BaTiO,NiFe,O, al N al * BaTiO„ZnFe,O, a .= —— BaTiO,INi, „Zn,,Fe,O, · *. FI n . A“A LE a O I LI I IL I OOO -d 100 200 300 400 500 600 t["C] Figure 5. Temperature dependence of mass magnetization ...
... e: An integrated study by TGA, QMS and XPS techniques. J. Mol. Catal. A Chem. 2005, 228, 283-291. [CrossRet] 'umar, N.; Kachroo, P.L.; Kant, R. Thermal decomposition of some N-oxide complexes of cobalt(II), nickel(II) and copper(II) carboxylates. J. Therm. Anal. 1979, 17, 81–85. [CrossRef] Dollimore ...
... superexchange interaction caused by the replacement of Fe9+ by Zn?* ions at tetrahedral sites. 20 18|- 16| 144| s | —— ~ Ž 12 - Pl J·\–T··J–r–n–w?–r·)?–«_»–&i%,_ —H;\Jf , 10[ —— BaTiOJNiFe,O, R i s= s . i —c— — BaTiO„/ZnFe,O, a | —— BaTiO,„Ni, Zn,.Fe,O, \·“\ 4l 2|- -a yO OO \ o \HŽ·; ...Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković. "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, MDPI AG (2023). https://doi.org/10.3390/inorganics11020051
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Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)
In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...Pavle Tančić, Aleksandar Kremenović, Predrag Vulić. "Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)" in Powder Diffraction, Cambridge University Press (CUP) (2019). https://doi.org/10.1017/S0885715619000897
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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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The application of mathematical transformation on aeromagnetic data in order to detect magnetic anomaly sources
Ignjatović Snežana, Ivanović Nadežda, Vasiljević Ivana, Vasiljević Ilija, Kričak Lazar. "The application of mathematical transformation on aeromagnetic data in order to detect magnetic anomaly sources" in 45th International October Conference on Mining and Metallurgy, Bor:University of Belgrade-Technical Faculty in Bor (2013): 256-260
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Geochemical Map of Eastern Serbia in 1:1 000 000. and applicarion in defining the ecological status of selectet area
Gordanić Vojin, Milovanović Dragan, Vidović Milka, Rogan Saša, Trajković Ivana. "Geochemical Map of Eastern Serbia in 1:1 000 000. and applicarion in defining the ecological status of selectet area" in Procceedings of the 17th Meeting of the Assocition of European Geological Societies, MAEGS - Geology and Digital Age, Beograd:Српско геолошко друштвo (2011): 187-192
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3-D Basin Modeling of the Serbian Banat Region of the Pannonian Basin: Evaluating the Impact of Tectonic Inversion upon Hydrocarbon Potential
Yilmaz Hulia, Pigott John, Radivojević Dejan, Pigott Kulwadee, Milovanović Ivana. "3-D Basin Modeling of the Serbian Banat Region of the Pannonian Basin: Evaluating the Impact of Tectonic Inversion upon Hydrocarbon Potential" in AAPG Search and Discovery Article/AAPG International Conference and Exibition, Milan, Italy no. 90135, Tulsa:Online Journal for E&P Geoscientists (2011)