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1759 items

  • Neogena i kvartarna herpetofauna (Anura i Squamata) Srbije : doktorska disertacija

    Dragana D. Đurić (2019)
    U radu je prvi put opisan deo herpetofaune (Anura i Squamata) iz neogenih i kvartarnih lokaliteta Srbije. Obrađeni su lokaliteti Sibnica, Prebreza, Lazarevc, Vračević i Riđake, neogene starosti. Lokaliteti kvartarne starosti su pećine Mala i Velika Balanica, Pešturina, Hadži Prodanova, Baranica, Vrelska pećina i sedimentne ispune fisura u kamenolomima Venčac i Beočin. U radu je prikazana je taksonomska analiza herpetoloških ostataka. Pored taksonomske analize fosilnog materijala dat je kratak geografsko-geološki opis proučavanih lokaliteta, osnovne osteološke karakteristike anura i skvamata ...
    paleoherpetofauna, Anura, Squamata, kvartar, pleistocen, neogen, Srbija, paleoekologija, paleoklima
    ... hyaena Crocuta crocuta spelaea (Goldfuss, 1823) from Baranica Cave (southeast Serbia): competition for a den site. In: Toškan, B. (Ed.). Fragments of Ice Age environments. Proceedings in Honour of Ivan Turk’s Jubilee, Opera Instituti Archaeologici Sloveniae, 21: 69–84. Dubois, A., Bour, R. 2010 ...
    ... Changes and Population Movements in the Late Lower and Early Middle Palaeolithic of the Central Balkans. In: Harvati K. & Roksandić M. (eds.) Palaeoanthropology of the Balkans: Human occupation and its context, 331 p. Mihailović, D., Mihailović, B. 2006. Palaeolithic site Hadži Prodanova cave by Ivanjica ...
    ... reptile and amphibian proxy at the Gran Dolina site, Atapuerca, Spain. Palaeogeography, Palaeoclimatology, Palaeoecology, 261: 177–192. Blain, H.–A., Gibert, L., Ferr{ndez–Cañadell, C., 2010a. First report of a greentoad (Bufo viridis sensu lato) in the Early Pleistocene of Spain: pale–obiogeographical ...

  • 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)
    Landslides, Extreme precipitation, Data analysis, IPL project report

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... the Eh value for KNN-W2 (510 mV) still lies in the range characteristic for oxic conditions (Fig. 2). Bearing inmind that sampleswere collected im- mediately after excavation and kept hermetically closed, the KNN-W2 lignite must have been exposed to in situ oxidative conditions prior to excavation. This ...
    ... from 5 active coal mines located in Central Europe. In Poland, thesewere theBełchatów, TurówandKonin opencast mines,which together are responsible for ca. 95% of the country's lignite production (Polish Geological Institute, 2020). In Serbia, sampling was performed in the Kolubara opencast mine which ...
    ... however, was not noted in the results presented here. Among the studied samples, the most mature were lignites from the Turów mine. Organic matter accumulated in this coal basin is subjected to considerable geothermal heating (Liber-Makowska, 2013) which results e.g., in higher (in comparison to other ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... particles in the production fluid, the number of artificial methods that can be used is reduced. Parameter C3 represents GOR. With the increase in the gas factor in the production fluid, the efficiency of artificial methods, which can be used, decreases, except in the case of GL where an increase in GOR ...
    ... standard of all methods. In Figure 6b–f is given Figure 5. Results of the artificial lift method selection in the Salman field using the ELECTRE model [12]. Data from the Salman oil field are included in model M, described in the previous section, and results are given in Figure 6. Figure 6 shows ...
    ... interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. References 1. Naderi, A.; Ghayyem, M.A.; Ashrafi, M. Artificial Lift Selection in the Khesht Field. Pet. Sci. ...

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... enzyme activity in the absence and presence of metal complexes and to verify potential binding of these drugs to the enzyme. The tested metal complexes decreased the activity of phospholipase A2 in an uncompetitive inhibition mode. A binding of the ruthenium complex near the active site of the enzyme ...
    ... synthesized as described in the literature.28,29 Chemical analysis, UV-VIS and nuclear magnetic resonance (1H-NMR) spectral data of these complexes were in good agreement with those obtained in previous preparations. Structural formulae and relative masses of complexes used are given in Table 1. Porcine ...
    ... monitoring the changes in mass spectra in the m/z range 10 000–15 000, fresh solution of PLA2 c = 0.02 mg ml�1 in 50 mM Tris-HCl buffer (37 1C and pH = 8.5) was prepared and applied on the sample plate premixed with sinapic acid, as control. Metal complexes were dissolved in the same buffer to different ...

  • A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić (2012)
    This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...
    multilingual digital libraries, query expansion, TMX
    ... the article in .pdf format (residing on the official site of the INFOtheca journal) as well as the entire aligned parallel text of the article in .html format. More powerful is the full-text search (Figure 5). The user initiates this search by submitting a keyword in English or in Serbian and ...
    ... (one or more sentences or segments) in one of the TMX document languages, where the text in the first TUV is usually in the source language, and the texts in the remaining TUVs are in one or more target languages. Although the order of languages is the same in each TU, there is a TUV attribute ...
    ... translator’s aid, which could be of assistance both in reviewing terminology used in context and in refining the multilingual resources used within the system. Keywords: multilingual digital libraries, query expansion, TMX 1. Motivation In this paper we outline the main features of Bibliša ...

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... former Yugoslavia, enabled today's Geological Survey of Serbia involvement in the Project OneGeology-Europe With the assistance of competent Ministry and Faculty for mining and geology, Serbia in the last moment step in the new European trend of exchanging data on the basis of uniform criteria for ...
    ... the former Yugoslavia, enabled today's Geological Survey of Serbia involvement in the Project OneGeology-Europe With the assistance of competent Ministry and Faculty for mining and geology, Serbia in the last moment step in the new European trend of exchanging data on the basis of uniform criteria for ...
    ... flows Vodeni tokovi Quatemary 0 Eartsurface deposits River plain system 4 Quarternary Holocene in general Holocen uopate 2 Quartemary Pleistocene in general Pleistocen uopste ee 3 Quarternary _Quarternary in general Kvartar uopate Quatemary | 4 Terrestrial deposits Se Cae 1241 up. ptht 1.21.34 4 Quartemary ...

  • Увођење доменских и семантичких маркера за област рударства у српске електронске речнике

    Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић (2017)
    ... Lemmatization”, In: Proc. of the 10th International Confer- ence on Language Resources and Evaluation, LREC 2016, Portorož, Slov- enia, pp. 23–28. Крстев и др. 2016: Cvetana Krstev, Anđelka Zečević, Duško Vitas, and Tita Kyriacopoulou, “NERosettafor the Named Entity Multi-lingual Space”, In: Human Language ...
    ... Aleksandra Tomašević, Ranka Stanković, Bilјana Lazić INTRODUCING DOMAIN AND SEMANTIC MARKERS FOR THE FIELD OF MINING IN SERBIAN ELECTRONIC DICTIONARIES Summary Semantic markers in electronic dictionaries allow for complex queries for information extrac- tion. When it comes to domain-specific queries ...
    ... сипка, бункер, заштитни стуб, широко чело, вен- тилација +MinProcess Припрема минералних сировина кретање масе, узорак, уситња- вање, дробљење, сито, млевење, млин, класирање, концентрација, флотација, флотацијска пулпа, згушњавања, лужење, центрифу- гирање, депоновање +Petroleum Експлоатација ...

  • The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines

    Krstev Cvetana, Stanković Ranka, Vitas Duško, Obradović Ivan (2008)
    In this paper we present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for tuning queries before submitting them to a web search engine. We argue that the selection of words chosen for a query, which are of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and wordnets. These dictionaries enable semantic ...
    LR web services, MultiWord Expressions & Collocations, Information Extraction, Information Retrieval
    ... fact that the adjective form dinarsku is in the accusative case that is required by the preposition na. 7. In order to test our system we have used a log file of one of Serbian professional journals that deals with economic issues. The journal’s web site is supported by a search engine that ...
    ... do not have a corresponding entry in our e-dictionaries) do not inflect. It would yield correct examples in some cases (for instance, in šper ploče ‘plywood’ šper does not inflect and it is not in our e-dictionaries since it is not a valid Serbian word). In some other situations the prediction ...
    ... unrelated to the original keyword, thus making any stemmer useless. 3. In some cases the user may wish to perform a bilingual search in order to find documents on the chosen subject in two languages, e.g. English and Serbian. In the case of garlic the appropriate query should be composed of the ...

  • Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)

    M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)
    Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...
    Stratigraphy,Economic Geology,Geology,Fuel Technology

  • 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
    ... vremenskog kašnjenja u izraz za trenje samo se pojačava efekat kompleksne prirode trenja na sam proces kretanja bloka (a i proces kretanja duž raseda in situ). Naime, u rasednoj zoni, usled kretanja, dolazi do pojave zagrevanja i topljenja stenske mase, termalnih pritisaka, stvaranja silika-gela koji ...
    ... razmatra se uticaj ovog parametra na dinamiku modela; 9     Slika 1-3. Vremensko kašnjenje τ, osmatrano u laboratorijskim uslovima (a), i in situ (b). Rezultati numeričke simulacije i poređenje sa terenskim podacima [Marone, 1998].   6) u radu [Kijko, i dr., 1993] ukazano je na vremensku ...
    ... parametra na dinamiku modela, smatramo da će njegova tačna uloga u realno osmatranim potresima biti određena budućim empirijskim istraživanjima (in situ ili u laboratorijskim uslovima). 10   Razlozi za uvođenje parametra jačine trenja c u Karlson-Langer model slične su prirode kao i za uvođenje ...

  • 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
    ... vremenskog kašnjenja u izraz za trenje samo se pojačava efekat kompleksne prirode trenja na sam proces kretanja bloka (a i proces kretanja duž raseda in situ). Naime, u rasednoj zoni, usled kretanja, dolazi do pojave zagrevanja i topljenja stenske mase, termalnih pritisaka, stvaranja silika-gela koji ...
    ... razmatra se uticaj ovog parametra na dinamiku modela; 9     Slika 1-3. Vremensko kašnjenje τ, osmatrano u laboratorijskim uslovima (a), i in situ (b). Rezultati numeričke simulacije i poređenje sa terenskim podacima [Marone, 1998].   6) u radu [Kijko, i dr., 1993] ukazano je na vremensku ...
    ... parametra na dinamiku modela, smatramo da će njegova tačna uloga u realno osmatranim potresima biti određena budućim empirijskim istraživanjima (in situ ili u laboratorijskim uslovima). 10   Razlozi za uvođenje parametra jačine trenja c u Karlson-Langer model slične su prirode kao i za uvođenje ...

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... based on field-scale experiments in lateritic red soil regions. Sci Total Environ. 2021; 761: 143252. https://doi.org/10.1016/j.scitotenv.2020.143252 PMID: 33183819 Jien SH, Kuo YL, Liao CS, Wu YT, Igalavithana AD, Tsang DCW et al. Effects of field scale in situ bio- char incorporation on soil ...
    ... https://doi.org/10.1016/j.carbon. 2019.09.018. Zhang Y, Feng DD, Zhao YJ, Dong HM, Chang GZ, Quan C, et al. Evolution of char structure during in-situ biomass tar reforming: Importance of the coupling effect among the physical-chemical structure of char-based catalysts. Catalysts. 2019; 9: 711. ...
    ... carbonates or sulfates, whereas phosphates would be counted correctly in Yox. Phosphorous content above 0.1% is also found in both gasification chars and in CS180h. In order to confirm the presence of soluble phosphorous in the original activated carbon AC2, the amount of phosphate from an eluate ...

  • Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of “Podbracan”

    Aleksandar Milutinović, Aleksandar Ganić, Thamer Rayes Diyab, Rade Tokalić, Meri Ganić (2015)
    ... po- sition of starting point in traverse - Standard deviation of the start- ing grid bearing ( σ v = ± 8ʺ); as well as the errors occurring during measuring, i.e. during setting out of traverse points in form of errors in setting out direction angles and error in setting out lengths of traverse ...
    ... tra- verse point in the direction of x-axis; i E σ - standard deviation of tra- verse point in the direction of y-axis; 1i N σ − - standard deviation of the previous traverse point in the direction of x-axis; 1i E σ − - standard deviation of the previous traverse point in the direction ...
    ... of bauxite in the deposit of "Podbracan" 4.1. Mining method The applied mining method, named the sublevel caving excavation method in crosswise direction, was chosen based on the relevant mining- geological parameters, mining condi- tions and other technical-technological factors in�uencing the ...

  • Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)

    Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick (2024)
    Triassic, Carnica event, clay mineralogy, conodont biostratigraphy, Neo-Tethys

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)

    Liubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić (2020)
    Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, Serbia

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... archaeological site near Mošnje (Slovenia). Applied Clay Science, 57, 39-48. LCPC (1987) Limites d'Atterberg, limite de liquiditć, limite de plasticite, method' deessai LPC, n*19. Paris, France, Publication LCPC, 26 pp. McManus J. (1988) Grain size distribution and interpretation. Pp. 63–85 in: Techniques ...
    ... samples are shown in . Kaolinite occurs as lamel- lar hexagonal flakes with broken edges, while montmorillonite particles mainly form larger crumbly aggregates and dense plates with undefined edges. Titanium minerals in the form of rutile needles (~20 um) are evident in the samples, in agreement with ...
    ... Bodenbeschaffenheit - Bestimmung der Partikelgr Jlenverteilung in Mineralb den. Beuth. Berlin, Germany, Deutsches Institut far Normung. Djordjević B. (2013) Pottery making in Zlakusa. First ethnoarchaeological research project in Serbia. P. 49 in: Conference Proceedings, Rome Italy, l3th-I4th May 2010 ...

  • Еоценска фауна југозападног дела Сирт басена (Либија)

    Љупко Рундић, Мери Ганић (2020)
    Еоцен, крупни мекушци, нумулити, ЈЗ Сирт басен, Либија

  • Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling

    Branislav Petrović, Veljko Marinović, Zoran Stevanović (2023)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change