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518 items

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... the territory of Serbia (Au, Ag, precious and disseminated metals). The metallogenic analyses carried out so far show that new reserves of gold are likely to be discovered in the Blagojev Kamen area (hydrothermal quartz-vein type in the Neresnica-Beljanica metallogenic zone), the Timok volcanic complex ...
    ... III-2 Tilva Njagra ore field B4. Beljevina deposit 85. Zlaće deposit \ll-3 Zlot group of occurrencos. 4850 IV-1 Markov Kamen-Gradište ore district I\-1 Markov Kamen-Savinac ore field 96 Savinac: IV-2 Gradište group of occurrences V - Potaj Čuka - Tisnica ore district 115. Korkan deposit ...
    ... It is mainly concentrated in quartz veins (shellite). The areas of potential interest for the prospecting of tungsten are the zones of Blagojev Kamen, Golija and Kopaonik. It is possible that future explorations will lead to the discovery of the occurrences of sheelite within skarns, but the economic ...

  • Анализа квантитативног и квалитативног режима подземних вода: Случај изворишта за водоснабдевање Друговца у Смедереву

    Милан Павличић (2024)
    У раду су приказани резултати истражних радова који су спроведени у периоду од 13.04.2018. до 31.05.2019, у циљу дефинисање режима и категоризације резерви подземних вода на изворишту за водоснабдевање Друговца у Смедереву. Бунарима ИЕБДР-1/93 и ИЕБД-1/2002 су каптирани песковити седименати неогене старости. У току режимских осматрања вршени су тестови црпења, осматрања нивоа подземних вода, режимa падавина као и квалитетa подземних вода. Утврђене су укупне резерве подземних вода у количини од 5,3 l/s. Хемијске анализе воде показују да је хидрохемијски ...
    режимска осматрања, тестови црпења, неогени седименти, хидрохемијски режим, извориште
    ... 8 510,3 1994 36,1 | 16,5 | a16,2 | 35,2 | a6,9 | o7,a | io0,6 | 62,6 | 31,9 | 58,3 | 22,2 | 3177 555,3 1995 64,8 | 34,0 | a1,7 | c63,1 | ao,r || so,r | a6,5 || os,8 | og | al |,g | 63,8 621,6 1996 215 | 82,1 | 564 | 45, | c63,5 | i8,5 | ac,o || 52,0 | s7,2 | 23,6 | 56, | o6,2 649,1 1997 29,1 ...
    ... 22, | 51,8 | ı8, | 36,3 | 122,2 | 50,6 || 35,8 | 159,0 | 15,3 | s0,6 | 35,6 760,5 2002 274 | a4, | 23,0 | 78, | 49,6 | io0,8 | c6o,9 | 137,7 | ono | so,2 | 46,8 | 61,7 790,0 2003 35,6 | 45,4 | 30,4 | iog,0 | ı24 | 7P,e | oo,o || 33,6 | 57,3 | s5,0 | o1,7 | 38,4 818,4 2004 692 | 210 | 3,L | 25,8 | ...
    ... 39,4 551,9 2005 44,8 | s0,7 | a42,8 || 53,8 | 724 || ao,a | o || ıa5,4 | ı25,8 | 38,8 | 46, | 58,7 832,4 2006 25,9 | 52,4 | se,g | se,o | 26,3 || so,g | 20,6 | io7,ı | 25,7 | 24,0 | ı7,6 | 78,3 631,6 2007 207 | 24 | 673 | a4,0 | a3,0 | on,2 | oo,0 || c5,0 | sea | 27,4 | a5,0 | 43,4 604,8 2008 ...

  • Automatic construction of a morphological dictionary of multi-word units

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić (2010)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multiwordn units, noun phrases, query expansion
    ... ‘caramel cream’ and kamen-temeljac ‘foundation stone’: both components in these MWUs are masculine inanimate nouns in the nominative singular, but in the first one karamel is the head and the first component does not inflect (super-class 2xn), while in the second example kamen is the head and both ...
    ... Both components inflect and agree in case and number nc nxnf kit ubica killer whale The gender of the second component changes in plural nc nxn3 kamen- temeljac foundation stone The separating hyphen can be omitted nc nxn2 Kongo Brazavil Congo- Brazzaville Neither of the components inflects for ...
    ... of a hyphen, and in these cases the strategy offers a very similar class. There are also some classes that are related to only one very specific MWU, so we have not even tried to formulate a rule for them, e.g. the class nc 2xn3xn1 for Sao Tome i Principe. However, all super-classes are covered by rules ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... life conditions of the biosphere which could be potentially preserved within the sedi mentary record. Except them, there are also longer period cy- cles so-called “grand cycles” of 400 kyr, and 1.25, 2.35 and 4.6 my (oLSEN, 2001). The effects of these longer period cycles are only potentially noticeable ...
    ... attached to Serbia, where he de- cided to settle down despite much better financial conditions he had in Austria. His determination and love for science was so strong that he managed to achieve important discoveries during challenging times, in the course of two World Wars, and he repre- sents a great role ...

  • Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria

    Vladimir Krivošić, Luka Crnogorac, Rade Tokalić (2024)
    The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...
    utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijuma

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... 7/9 179.3 - 64.4 173 4.7 24.87 ± 0.95 Ma 35 ± 0.95 Ma 11 Mutanj 3214–222 44�0603900 20�2604300 Rhyodacite 9/9 174.0 - 33.9 211 3.8 12 Beli kamen 3230–249 44�0400900 20�3202200 Leucominette 19/19 207.3 - 49.0 16 8.7 24.1 ± 0.93 Ma 13 Družetić 1 3192–198 44�0105200 20�0404800 Basalt ...
    ... —644 173 4.7 24.87 + 0.95 Ma 3205-213 20°17'41" 35 + 0.95 Ma 11 Mutanj 44°06'39" Rhyodacite 9/9 174.0 — 33.9 211 3.8 3214-222 20°26'43”" 12. Beli kamen 44°04'09"” — Leucominette 19/19 207.3 — 49.0 16 8.7 24.1 + 0.93 Ma 3230-249 20°32'22" 13 Druzeti¢é 1 44°01'52” Basalt 17 28.9 48.1 294 3.5 23.9 + 2 ...
    ... Smederevo (scale 1:100 000). Beograd: Savezni Geološki Zavod. Prelević, D., Cvetković, V., Jovanović, M. (2000). The composite dome of Beli Kamen (Mt. Rudnik, Central Serbia) – the example of a specific interaction of lamprophiric and granitoid magma. In S. Karamata & S. Janković (Ed.), Geology ...

  • 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
    ... water for 24 h. According to SRPS ISO 5667-10:2007, during sampling, the wastewater is mixed with a solution of nitric acid in order to stabilize it, so the pH of the solution after sampling and before materials testing was ~4.2. For that reason, all experiments related to heavy metals removal were performed ...
    ... literature [47,48] that because of HTC treatment, an amorphous network with a high content of carbon is obtained with increased surface functional properties so it may be said that HTC-obtained carbon containing materials from glucose and fructose do not possess crystal structures. It was of interest to determine ...
    ... activated carbon structure and changes it [60–62]. On the other side, the boiling points of the Li and Na are much higher than activation temperature, so the possibility of their entering into the structure of the activated carbon and chaining is much lower, what may be a reason for maintaining morphological ...

  • 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
    ... ������� Abstract: 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 ...
    ... updates Abstract: 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 ...

  • Fuzzy expert analysis of the severity of mining machinery failure

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    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 ...
    Severity of failure, Severity of failure assessment, Mining machinery, Fuzzy sets, Fuzzy logic

  • Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species

    Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)
    Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...
    microstructure, microwave-hydrothermal synthesis, adsorption, magnetic nanoparticles, arsenic

  • Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer

    Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)
    ... important are: (i) opening ofnew sources for regional water supply based on alluvial groundwater and (ii) centralizing waterworks at municipality levels so that water will be adequately treated and protected from pol lution. Acknowledgements The authors of this chapter gratefuily acknowledge the financial ...

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...
    hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije
    ... algorithms mimic the natural evolution process. Namely, they optimize a “population” through several “generations” by changing adaptable parameters so that the population fits best an accepted criterion function. Thus, the initial weights of the NN were determined by the genetic algorithm on basis ...

  • Definisanje strukturnih odnosa primenom postupka horizontalni gradijent

    Snežana Ignjatović, Ivana Vasiljević, Natalija Jovanović (2019)
    Različiti postupci matematičkih transformacija se mogu primeniti na gravimetrijskim i magne tometrijskim podacima, kako bi se na istražnom terenu definisali strukturno-tektonski odnosi. U radu su prikazani rezultati dobijeni korišćenjem postupka horizontalni gradijent i ukupni horizontalni gradijent na gravimetrisjkim podacima. Navedeni postupci su pomogli da se detektuju kontakti sa velikim padnim uglom (vertikalni ili subvertikalni kontakti), koji se mogu interpretirati kao rasedi. Za test područije uzet je istražni prostor koji se nalazi na jugoistoku Srbije u okolini Vranjskog basena. Položaji ...
    gravimetrijski podaci, matematičke transformacije, rased, Vranjski basen
    ... Kitson House Elmete Hall Leeds, UK, 2007. [8] Marović M, Toljić M, Rundić Lj, Milivojević J, Neo- alpine Tectonics of Serbia, Serbian Geological So- ciety, Beograd, 2001. SUMMARY THE APPLICATION OF HORIZONTAL GRADIENT FOR DEFINING STRUCTURAL CORRELATION The different methods of mathematical ...

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... compare learning materials that best suit their current needs more efficiently. OER or the related metadata standards are often stored in the so called Learning Object Repositories (LOR). Different LORs address different needs and therefore have different metadata schemas. Chan & Zeng emphasize ...
    ... find and compare learning materials that best suit their current needs more efficiently. OER or the related metadata standards are often stored in the so called Learning Object Repositories (LOR). Different LORs address different needs and therefore have different metadata schemas. Chan & Zeng emphasize ...

  • Глаголи у кухињи и за столом

    Цветана Крстев, Биљана Лазић (2015)
    У раду је приказано истраживање лексике на српском језику кулинарског домена које се заснива на коришћењу доменског корпуса, електронских лексичких ресурса, пре свега WordNet-а и морфолошких речника, и локалних граматика. Приказане су доменске специфичности ових ресурса, како се користе, и међусобно употпуњују. Посебно је приказано како се коришћењем доменског корпуса могу екстраховати глаголи специфични за кулинарски домен и описати начини њиховог коришћења. Дат је попис глагола са основним подацима који је добијен применом представљених метода.
    аутоматска обрада, коначни трансдуктори, електронски речници, семантичке мреже, локалне граматике, кулинарство
    ... динстање да батака, лука, меса добијати добијање да багремовог уља добити добијен да гил, сок од купина додавати додавање да различитим јелима, кухињске соли додати додати да брашна, воде, готовим шампињонима доливати доливање да воде, млека, супе досипати досипање да воде досолити досољавање да хране ...
    ... млеко за натапање, пишкота, кекса натопити натопљен, натопити да пишкоте, хладним чоколадним млеком, лимуновим соком натрљати натрљати да морском сољу, белим луком, уситњеним рузмарином натрунити натруњен да босиљак, суви босиљак нафиловати нафиловати, нафилован да тесто обавити обавити да танком ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... as quartzlatitic stocks and dykes, crosscut through Cretaceous carbonate–sandstone–shale sequences developing local contact metamorphic aureoles. So far, evidence of a plu- tonic body has not been confirmed. Borehole data show that Cretaceous sediments are in tectonic contact with peridotites ( ...
    ... & Cook 2004). Further, according to Yardley et al. (1991), fluid flow through open systems produces oscillatory zoned garnets. Additionally, ani so tropic garnets widely range in composition whereas the garnets near the end-member of andradite (Adr > 90) are gene- rally isotropic. Trace elements ...

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Two approaches to compilation of bilingual multi-word terminology lists from lexical resources

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2020)
    In this paper, we present two approaches and the implemented system for bilingual terminology extraction that rely on an aligned bilingual domain corpus, a terminology extractor for a target language, and a tool for chunk alignment. The two approaches differ in the way terminology for the source language is obtained: the first relies on an existing domain terminology lexicon, while the second one uses a term extraction tool. For both approaches, four experiments were performed with two parameters being ...
    Linguistics and Language,Software,Artificial Intelligence,Language and Linguistics

  • Хидрогеохемијске карактеристике и квалитет вода слива Требишњице, Република Српска, Босна и Херцеговина

    Dragoslav R. Banjak (2016-08-25)
    Упркос неповољном временском и просторном распореду, воде су најзначајнијиприродни ресурс Источне Херцеговине. Ова чињеница довела је до реализацијепројекта „Вишенамјенског хидросистема Требишњица“, којим је, премаМилановићу (2006), до сада обухваћено: седам хидроелектрана, шестакумулација, шест брана, шест тунела укупне дужине 59,7 km, неколикоприступних тунела, 62,5 km бетонског канала кроз Попово поље, канал крозДабарско (6750 m) и Фатничко поље (2770 m) и систем тунел-канал или цјевоводпрема Дубравама.У почетку са доминантним енергетским предзнаком, концепција јетрансформисана у интегрално рјешење вишенамјенског коришћења и заштитевода и животне ...
    хидрогеохемијски процеси, мултиваријантна статистичкаанализа, инверзно геохемијско моделовање, квалитет воде, употребиљивост водеза наводњавање, слив Требишњице
    ... салинитета (C2) Погодна за наводњавање биљака средње толерантних према соли, на земљиштима средњег интензитета испирања. 750-2250 μmho Вода високог салинитета (C3) Потребан избор биљака високе толерантности према солима, гајених на земљиштима високе дренаже. >2250 μmho Вода врло високог ...
    ... користити за наводњавање већине култура, док класи С2 припадају воде средњег салинитета, погодне за наводњавање култура умјерено толерантних према соли. Осим кондуктивности, класификација Алисона и др. (Allison et al, 1954) укључује и релативну активност адсорпције натријума (SAR), према којој ...
    ... Popovo polje, channel through Dabar (6750 m) and Fatnica polje (2770 m) and tunnel - channel system or a pipeline towards Dubrava have been included so far. At the beginning with dominant power utility intention, the conception is transformed into an integral solution of multipurpose and water protection ...