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Упит dcterms_subject_txt:Nanocrystalline material

339 items

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... and Middle Jurassic clasts are represented by red nodu- lar limestone and Bositra-limestone. GAWLICK et al. (2017) supposed that this turbidite material was derived from the Upper Triassic-Middle Jurassic sedimentary succession of the DIU, however, the Krš Gradac quarry contains only Late Triassic ...

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... the ration of resources and production (SS2). Resources are generally defined as concentrations of naturally occurring solid, liquid or gaseous material in or on the Earth’s crust in a form that makes economic extraction potential- ly feasible. Total resources include reserves, and hypothetical and ...

  • 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
    ... Formation were dated and correlated to Newark Basin Triassic rocks to de- termine climate cycles age and timing logged in the rocks and represent the material geologic evidence of 405 kyr Milanković’s cycle (CALLIER, 2018). ATS based on Milanković’s forced stratigraphy, calibrated with palaeoclimatic forcing ...

  • 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
    ... the two margins was still open in Editorial handing: K. Saric. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00015-018-0321-8) contains supplementary material, which is available to authorized users. & Vesna Lesić vlesic@drenik.net 1 Department of ...

  • Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra

    Aleksandar Milojević (2024)
    Nakon radova otvaranja i početka eksploatacije, rudno telo bakra velikih rezervi zahteva i veliku količinu eksploziva da bi se ostvario zacrtan kapacitet. Samim tim, neophodno je izraditi funkcionalan magacin eksploziva koji će biti pristupačan svim horizontima i koji će moći da ispuni celokupni kapacitet svih horizonata. Obzirom da će se u magacinu skladištiti eksploziv, on mora ispunjavati specijalne uslove kako bi skladištenje bilo bezbedno. Neophodno je isprojektovati magacin tako da ispuni sve zahteve po pitanju količine i načina skladištenja eksploziva, ...
    podzemna eksploatacija, ležište bakra, magacin, eksploziv
    ... Dimenzije prostorije su 3x2,8 m, a debljina sloja torkret betona 0,25 m. X R—A —— ii Young's 5 lntact \ Initial Elastic Poisson's Failure Material m m Dilation |Piezo - |MatenalName |CoPor| glememt | Yype_ |MeđuM| Rato |_ Giterom | Tvpe | Compreššive | ipeak) |iresiduam | *(peak) | {residu"l)| ...
    ... | \ ~ NJ |__-- | \ i \ \ A _— f L=2.800 Angle=270.0"| j__A | _ ı — ij | || | Ć IA | \ iii \ SLC | i \ j X | | , L | i Ć | || i \ \ | Material |Beam Element| Stage — |Reinforcement |Reinforcement: | Reinforcement: Reinforcement: Reinforcement: | Concrete: LFomcrete: Youme's| linerName |Cake ...

  • Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis

    Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović (2017)
    U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...
    Omeka, Wordnet, pretraga punog teksta, morfološka i semantička pretraga teksta, proširenje upita
    ... make the addressee suffer or feel guilt. Genuine suicide letters are short, typically less than 300 words in length. Extraneous or irrelevant material is often excluded from the text. Next forensic text type is death row statements. They either admit the crime, leaving the witness with an impression ...

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... objective of the project is to produce course materials in several different languages, in various forms such as videos, audio streams and written material. In order to facilitate the use of these materials in a multilingual environment, a language support system is integrated into the BMP, consisting ...

  • Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom

    Saša D. Bošković (2016-09-09)
    Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...
    rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energije
    ... Mining of material by a bucket wheel excavator is a very complex physical physical-mechanical process. Indicators of the effectiveness of this process depends on a number of various factors, of which in particular may be emphasized: physical- mechanical characteristics of the material to be mined ...
    ... increased strength, which is often the case in our opencast mines. Sizing of excavator specific digging forces towards smaller masses of extremely hard material is irrational and a solution should be sought either in the excavation of these masses by other equipment or by optimization of bucket wheel excavator ...

  • Mineragenetske karakteristike i potencijalnostjuvelirskih mineralnih resursa leckog vulkanskog kompleksa

    Zoran Ž. Miladinović (2012-12-11)
    Jedan od najznačajnijih regiona u Srbiji, sa stanovišta potencijalnosti juvelirskih mneralnih resursa, predstavlja lecki vulkanski kompleks, tercijarne starosti i dominantno andezitskog sastava. Ovaj vulkanski kompleks površine preko 700km2 nalazi se u južnojSrbiji na prostoru imeđu Kuršumlije, Lebana i Medveđe.Prvi su pažnju na juvelirske mineralne sirovine ovog prostora obratili graditeljiJustinijane Prima-e (VI vek). Najintenzivnija istraživanja izvršena su u periodu 1980–1982. ali samo na malom prostoru krajnjeg jugoistočnog dela vulkanskog kompleksa.U Leckom vulkanskom kompleksu dominiraju andezitske stene i njihovi piroklastiti.Smatra se ...
    vulkanski kompleks, mineragenetske karakteristike, juvelirski mineralni resursi, nalazišta, potencijalnost, kvarc, ametist, ahat, kalcedon, jaspis, prognoza
    ... the gemstone raw material is verified through lapidary processing (gemstone cutting) and the production of jewelry. It has been established that the most adequate use of raw material is by using en cabochon cut, gliptography and mixed cut. The quality of the gemstone raw material is verified through ...
    ... through lapidary processing (gemstone cutting) and the production of jewelry. It has been established that the most adequate use of the raw material is by using en cabochon cut, gliptography and mixed cut. The gemstone deposits of the Lece volcanic complex are represented by hydrothermal – epithermal ...

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Kvartarni klastiti iz bušotine kod Aranđelovca (rasadnik Mladost)

    Miroslav Radeta (2024)
    U ovom radu analizirani su kvartarni klastiti iz bušotine kod Aranđelovca IB 18-3, sa ciljem boljeg razumevanja njihovih sedimentoloških i litoloških karakteristika. Kvartarni sedimenti su prilično homogenog/uniformisanog sastava i čine ih finozrni klastiti (dominantno alevroliti) sa određenim procentom peskovite i glinovite frakcije. Oni su iskartirani u samoj povlati i debljina im je 27 m. U podini su gornjokredne karbonatne stene (krečnjaci, laporci, rekristalisali/mermerisani karbonati) i miocenski sediment predstavljeni raznovrsnim varijetetima klastično karbonatnih stena. Ispitivani kvartarni sedimenti odlikuju se odsustvom ...
    kvartarni klastiti, alevriti, Aranđelovac, granulometrija, mineraloško petrografski sastav
    ... mineralogical-petrographic analysis identified the presence of minerals such as quartz, feldspars and clay minerals. The results suggest that the material predominantly originates from the Bukovički granitoid, and the sediments themselves are of deluvial-proluvial origin. Key words: Quaternary ...

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... simple sentences in languages with sufficient amounts of avail- able text material can achieve useful results, such shal- low statistical methods are doomed to fail in the case of languages with a much smaller body of sample material or in the case of sentences with complex structures. e European Union ...
    ... translation of languages enabled ex- changes across languages; ‚ the creationof editorial andbibliographic guidelines assured the quality of printed material; ‚ the creation of different media like newspapers, ra- dio, television, books, and other formats satisfied different communication needs. In the ...
    ... requiresmillions of sen- tences to boost performance quality. is is one rea- son why search engine providers are eager to collect as much written material as possible. Spelling correction in word processors, and services such as Google Search and Google Translate, all rely on statistical approaches. ...

  • Димензионисање камионског транспорта јаловине на површинском копу Угљевик Исток 1

    Наталија Терзић (2024)
    Напредовањем рударења дошло је до потребе за експлоатацијом сложенијих и сиромашнијих лежишта, самим тим и повећањем трошкова.Профитабилна експлоатација лежишта минералних сировина захтева детаљну анализу свих техничко-економских фактора.Два најутицајнија фактора на профитабилност експлоатације руде јесу откопавање и транспорт, због тога је неопходно направити изводљив стратешки план који ће бити у складу са свим ограничењима и омогућити испуњавање свих планираних резултата.Транспорт на површинским коповима одвија се паралелно са осталим процесима експлоатације, стога је неопходно да сви системи буду усаглашени како не ...
    дисконтинуални транспорт, откривка, транспортне трасе, Тalpac, капацитет, камион, багер
    ... Truck Payload | 57.56| tonne equiv.to | 53.30|cu metres Full Truck Weight |131.56| tonne |:7]| Adjust Truck Payload to maximum capable for curent material [__ok__|| Camem | Cnuka 16. KapakrepacTruke JaMnepa aHraxkoBaHHX 3a TpaHCnopT HakoH yHoca cBHX HOTpcOHMX yJa3HHX HojlaTaKa H3BpCaBa Ce CHMy-alja ...
    ... H3BemrTaja, KOjH je IpHKa3aH Ha cJmiiH 17. 54 Product on Summary - Full Simulation Haulage System: Haulage System-1 Haul Cycle: [PRJ] TRASA 1 Material: [PRJ] Ugalj Roster: [PRJ] 7 day Week - 8 Hour Shifts Mvailability % 85.00 BucketFill Factor 0.94 Average Bucket Load Volume cu.metres 5.91 ...

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... spiculite wackestone, Bositfra packstone, crinoid wackestonc and grainstone, and crinoid-spiculite wackestone. Beside coarse-grained crinoidal material, quartz and other lithic grains are common. Ammonites occur rarely in the spotted lime- stones and marls. The upper part of the spotted limestones ...
    ... breccia bed, 70 cm thick, is found within the grey nodular limestones of the Filipka Valley section (42 m; Fig. 7). It is composed of crinoid material, with angular clasts (up to 2 cm) of spiculites, crinoidal lime- stones and other sedimcntary rocks. The average CaCOxy content is about 57 ...
    ... 31: 4091—506. [In Slovak, English summary]. Mišik, M., Jablonsky, J.. Ožvoldova, L. & Hal4sova, E., 1991. Distal turbidites with pyroclastic material in Malmian radio- arites of the Pieniny Klippen Belt (Western Carpathians). Geologica Carpathica, 42: 341—360. Mišik, M., Sykora, M., Ožvoldova ...

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... collisional tectonics led to burial of the two units in dif- ferent crustal positions, which resulted in discrepancy of Electronic supplementary material is available online: Supplement S1 “Satellite image of Eger – Tufakőbánya site” at http://geologicacarpathica.com/data/files/supplements/GC-72-4 ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... other educational materials represent a substantial proportion of the overall cost, while procedures of obtaining permission to use copyrighted material can also be very time-consuming and expensive 2. One of many mechanisms for creating roles for students as active participants in educational ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... sensors a)Resistance temperature detectors (RTD) – These use changes in the electrical resistance of a material (most commonly platinum) to measure temperature. The resistance of the material increases with temperature, and the relationship between temperature and resistance is nearly linear. RTD ...

  • Отварање и припрема лежишта за примену коморно-стубних метода откопавања

    Никола Станишић (2024)
    Циљ мастер рада је да кроз теоријски преглед и практични пример, прикаже процес отварања и припреме лежишта за примену коморно-стубне методе окопавања. Предмет рада је мало лежиште олово-цинкане руде, а од варијација коморно-стубних метода откопавања, изабрана је коморно-стубна метода етажног откопавања са откопавањем одoздо на доле. Рад се бави темама одабира и описа начина отварања и припреме лежишта, методама откопавања, технологијом израде просторија и откопавања лежишта, организацијом рада и проценом трошкова и економичности експлоатације.
    коморно-стубна метода, отварање, припрема, технологија, откопавање
    ... HanoHa 3a npocmopuje npoduna THIT-I (cogpmaep ,, Phase2 “) 26 Strength Factor Initial Element | Unit Weight | _Elastic Loading (MN/m3} Type Material Type Suength | Angle Friction Angle al leg) |[residual) (deg ips ldce) (peak)(dem) (residual) (des) {MPa) FieldStressand BodyForce 0.0267. ...
    ... npobano THII-II oru craOugimHe. Initial Element | Unit Weight Loading (MN/m3) Elastic Type Young's Modulus (MPa} Failure Criterion Material Type Tensile Strength (MPa)} Dilation Angle (deg) |riction Angle| Friction Angle. (peak) (deg) |[residual) (deg) J (MPa) FieldSStress ...
    ... npocTopuje ca npobano THII-II O craOunHe. Initial Element | Unit Weight | _Flastic (MN/m3} Type Young's Modulus (MPa) Failure Criterion Material Type Tensile' Strength (MPa) Dilation Angle \deg} |riction Angle| lpeak) (des) ||re: Fielo Stress and Body Force 0.0267 Isotropic 625818 ...

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... solid residues in the combustion of gas from UCG process in the boiler furnace, — there is no need for storing about 50% of the total mass is waste material (slag and ash re- main underground), — there is no need to secure significant areas necessary for the collocation and disposal of slag and ash ...

  • SASA Dictionary as the Gold Standard for Good Dictionary Examples for Serbian

    Ranka Stanković, Branislava Šandrih, Rada Stijović, Cvetana Krstev, Duško Vitas, Aleksandra Marković (2019)
    У овом раду представљамо модел за избор добрих примера за речник српског језика и развој иницијалних компоненти модела. Метода која се користи заснива се на детаљној анализи различитих лексичких и синтактичких карактеристика у корпусу састављених од примера из пет дигитализованих свезака речника САНУ. Почетни скуп функција био је инспирисан сличним приступом и за друге језике. Дистрибуција карактеристика примера из овог корпуса упоређује се са карактеристиком дистрибуције узорака реченица ексцерпираних из корпуса који садрже различите текстове. Анализа је показала да ...
    Српски, добри примери из речника, аутоматизација израде речника, издвајање својстава, Машинско учење
    ... In S. Ristić et al. (eds.) Leksikologija i leksikografija u svetlu savremenih pristupa, Beograd: Institut za srpski jezik SANU, pp. 133–154. [The material of the Dictionary of the SANU - the needs and possibilities of digitization in the light of contemporary approaches (in Cyrillic)]. Kilgarriff ...