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Упит dcterms_subject_txt:Nanocrystalline material

339 items

  • New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)

    Nevenka Đerić, Nataša Gerzina (2014)
    Gornja kreda, radiolarije, Jadar blok, zapadni pojas Vardarske zone, zapadna Srbija
    ... area.The inset to the right shows the column interval studied for radiolarians, with the sample locations indicated. The micropaleontological material is housed at the Faculty of Mining and Geology in Belgrade (registration numbers BR 1/1, BR 1/2 and BR 1/3). 4.SECTION DESCRIPTION AND BIOS ...
    ... Late Jurassic obduction and subsequent erosion in the Dinaridic-Hellenic belt, Cretaceous synorogenic basins were formed and filled with clastic material composed of variable amounts of ophiolitic, terrigenous and carbonate detritus (LUŽAR-OBERITER et al., 2012). Therefore, the obducted ophiolitic ...

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... the distribution of n-alkanes depends on maturity changes that particularly occur in the CS pyrolysis, it also depends on the kerogen precursor material. The prevalence of lower homologues in LPs is consistent with the predominantly algal origin of organic matter (OM) (Gajica et al., 2017). The ...

  • Arhitektonsko-građevinski kamen Crne Gore, stanje i potencijali

    Darko Božović, Vladimir Simić (2023)
    arhitektonsko-građevinski kamen, rezerve, kvalitet, potencijalnost

  • The Dictionary of the Serbian Academy: from the Text to the Lexical Database

    Ranka Stanković, Rada Stijović, Duško Vitas, Cvetana Krstev, Olga Sabo (2018)
    In this paper we discuss the project of digitization of the Dictionary of the Serbo-Croatian Standard and Vernacular Language. Scanning and character recognition were a particular challenge, since various non-standard character set encoding was used in the course of the almost 60-year long production of the dictionary. The first aim of the project was to formalize the micro-structure of the dictionary articles in order to parse the digitized text of and transform it into structured data stored in relational lexical database. This approach ...
    computer lexicography, lexical database, language resources, dictionary, Serbian language
    ... Arts, was published in 1959 in paper form. Out of 35 planned volumes, 19 volumes have been published with the 20th volume to be re- leased soon. The material used for the dictionary covers written resources of the standard Serbo-Cro- atian language from the beginning of the 19th century to the present day ...
    ... u: S. Ristić i dr. (ed.), 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 pos- sibilities of digitization in the light of contemporary approaches (in Cyrillic)]. Lemnitzer, ...

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... operational life of sucker rods depends on the quality of the material as well as the working conditions, including: maximum stress, the range of maximum and minimum stress, and the number of strokes per minute. All these factors affect material fatigue and the potential for rod failure,. In some cases ...
    ... of the rod pump. - Hydrodynamic Friction: Between the rod strings and the fluid through in which they move. – Internal Friction: Within the material of the rod strings and tubing, which occurs due to deformation under stress [3,4]. Walking Beam Equalizer Bearing Horsehead — Horsel Equalizer ...
    ... operation under harsh conditions where sand and corrosion are expected, the internal or external surface may be coated with various metals. The cylinder material itself can also vary. Chroming provides very strong resistance to abrasive damage. Nickel-carbide cylinders have a steel base over which a nickel ...

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Threshold-induced correlations in the Random Field Ising Model

    Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević (2018)
    Multidisciplinary
    ... license, and indicate if changes were made. �e images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended ...
    ... Avalanches in Wood Compression. Phys. Rev. Lett. 115, 055501 (2015). 22. Baró, J. et al. Statistical Similarity between the Compression of a Porous Material and Earthquakes. Phys. Rev. Lett. 110, 088702 (2013). 23. Navas-Portella, V., Corral, A. & Vives, E. Phys. Rev. E 94, 033005 (2016) 24. Soprunyuk ...
    ... Avalanches in Wood Compression. Phys. Rev. Lett. 115, 055501 (2015). 22. Bard, J. et al. Statistical Similarity between the Compression of a Porous Material and Earthquakes. Phys. Rev. Lett. 110, 088702 (2013). 23. Navas-Portella, V., Corral, A. & Vives, E. Phys. Rev. E 94, 033005 (2016) 24. Soprunyuk ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... samples of 2.5 L were taken from approxi- mately 20 cm below the water surface nearby the river bank and bottled in pre-cleaned flasks. The sample material was stored in the dark at a temperature of approximately 4 °C. Before extraction and TOC determination, all water samples were filtered through ...
    ... sediment samples were taken at the same five sampling loc- ations along the Danube and the Sava Rivers in Serbia (see Table S-I, of the Supplementary material to this paper). Sediment samples from the first two locations on the Sava River (Zabran and Makiš) were taken by means of a Van Veen grab from a ...
    ... non-target analyses indicates to potential misinter- pretation of the real state of pollution by restricted analytical approaches. SUPPLEMENTARY MATERIAL Tables S-I–S-IV are available electronically from http://www.shd.org.rs/JSCS/, or from the corresponding author on request. Acknowledgement. ...

  • A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area

    Filip Anđelković, Dejan Radivojević (2018)
    baden, Beograd, facije, facijalna raznovrsnost, sedimenti
    ... ap of Yugoslavia, Geology of Serbia (Pet‐ ković, 1977) and Geology of the Belgrade and its surroundings (Anđelković M., 1987, 1989a, 1989b).     MATERIAL AND METHODS    The  fieldwork  that  had been  carried  out  in  the Belgrade  area  studied  two  facies:  Tašmajdan  limestones  (so  called  ...

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... prof. dr Juliana Vučo and prof. dr Dragoslava Mićović, demonstrated true faith in me and were extremely helpful with their patient reading of the material, along with their sugge- stions without which this textbook would not have been finalized. I would like to thank dr Marija Đurić, professor at ...

  • Novi pristup proučavanju tekstura minerala značajnih za istraživanje rudnih ležišta

    Aleksandar Pačevski (2022)
    ... Ag-bearing pyrite was prevented, and the porous character of this mineral was emphasized, what underlines the specificity in the conditions of ore material deposition. Further examination of the Fe isotope composition of pyrite by LA-MC-ICP- MS, but on well-defined textural varieties such as colloform ...

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • The Nooj System as Module within an Integrated Language Processing Environment

    Ranka Stanković, Duško Vitas, Cvetana Krstev (2008)
    NooJ, electronic dictionary, lexical resources
    ... semantic information has already been attached to simple word entries, such as +Hum (human) and +Bot (botanic) for nouns, and +Col (colour) and +Mat (material) for adjectives. The use of wordnet enables a more systematic and more detailed attachment of such marks. Moreover, the attachment can be modeled ...
    ... literals from hypernyms of the selected synsets, so the search criteria includes pisanxe, pisano delo in Serbian and representation, writing, written material, piece of writing in English part of the query. Figure 8. The form for the expansion of the search based on a single keyword In aligned ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... was the urban-development potential for these facilities. These were also analyzed from the point of view of energy efficiency, different building material, energy independence, energy self-sustainability, and carbon footprint minimization. The architectural programs, derived from the multidisciplinary ...
    ... Sci. 2021, 11, 2691 7 of 24 • local production—supported by the choice of proposed building technology and materials. While resource efficiency in material use with reference to the 3R (reduce, reuse, recycle) concept remained as a general design goal, specific design strategies were proposed for energy ...
    ... them very flexible, allowing for partial adaptations, changes in use, or even regaining functionality after an extreme catastrophic event and severe material damage. 3.2.2. Sizing and Positioning of Open-Air and Indoor Features The general placement and interconnection of open-air features with built-up ...

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • Дефинисање геотехничких параметара еолских седимената земуснког платоа на основу лабораторијских и теренских SPT испитивања

    Ђорђе Крзман (2024)
    Циљ овог рада је био да се одреде геотехничке караткеристике предметног терена што представља полазну основу за рационално пројектовање и градњу. Истражним бушењем утврђено је да предметни терен изграђују четри лесна хоризонта и три слоја погребене земље до дубине од 22-23 m. Лабораторијским испитивањем добијени су ефективни параметри смичуће чврстоће, где се кохезија најчешће креће између c’=14 и 18 kPa, а угао унутрашњег трења f'= 25 - 30 °. Теренска SPT испитивањем уз коришћење прихваћених корелација у геотехничкој пракси ...
    лес, лабораторија, SPT, корелације, параметри
    ... border pemnocraarmsea - assumec Fill - clay, silt, debris | yqeuiheM cwTHor nO KpynHor rpal)eBuHckor ulyra. ii . |ARTIFICIAL DEPOSITS: Heterogeneous material, basically siy clay and sitt with varying proportions of- small to large construction debris. Teonouuxa rpanua a a Tpancrpechaa - iransgressive ...
    ... MaTepujan, y ocHoBuM npauiHacrTa rnuHa M npauiHa ca pa3nduMTMM yueuiheM cuTHor no kpynHor rpaf}eBMHCKor ulyTa. ARTIFICIAL DEPOSITS: Heterogeneous material, basically silty clay and silt with varying proportions of smalil to large construction debris. AJTyBVJAJIHE HACITAT E (oauuja noBonk>a): frnnaHa ...
    ... Xeroporen Maropujan, y ocnopi npauunnacra n H npaluinnia ca pasniurriM | yeuihem crHor no xpynuor rpa)eauHckor uyra. |ARTIFICIAL DEPOSITS: Heterogeneous material, basically siy clay and sitt with varying proportions of- small to large construction debris. [ARYBVIJATHE HACTATE (patua nononea) Trv (CLICI) ...

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.