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Упит dcterms_subject_txt:Computer Science Applications,Process Chemistry and Technology

2408 items

  • Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material

    Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)
    Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...
    Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, Pyrophyllite

  • Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema

    Svetlana M. Štrbac-Savić (2016-06-10)
    Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...
    podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija
    ... Physiology Analysis via Grey GM(1, N) and GM(0, N) Model, International Journal of Bio-Science and Bio- Technology, Vol. 1, No. 1, December, 2009, pp. 25-36, 2009. [LEV74] Baruch Lev, ―On the Association Between Operating Leverage and Risk.‖ Journal of Financial and Quantitative Analysis 9, pp. 627-642 ...
    ... 2008. [DENG82] J. Deng, Control problems of Grey Systems, Systems and Control Letters, 5, pp. 288-294, 1982. [DENG83] J. Deng, Grey fuzzy forecoast and control for grain, Journal of Huazhong University of Science and Technology, 2, pp. 1-8, 1983. [DENG85] J. Deng, Relatonal space of Grey Systems ...
    ... Systems: Theory and Application, Vol. 4 Iss: 2, pp.370 – 382, 2014. [ZHAN82] Zhan Yihui, The synthetic controllability of Grey System, Joutnal of Huayhong University of Science and Technology, 9, pp.11-16, 1982. [ZHANG86] Zhang Dianqing, Grey relational analysis of the shape function and the level ...

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... generation of the Web is denoted as Web 3.0, which is an umbrella term for customization, semantic contents, and more sophisticated web applications toward artificial intelligence, including computer-generated contents. While the conventional Web is the “Web of documents”, the Semantic Web includes the ...
    ... makes it useful and easily implemented convention for tagging content. Key benefits of using this approach is expanded access to descriptive data on educational resources, pooling knowledge about learning resources and providing tools and services to create applications that make use of big ...
    ... their learning content and prerequisites for their use, without even seeing them [2]. This paper aims to provide an overview of the ways that metadata are implemented in the LRMI and applied in BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology Enhanced Learning, http://www ...

  • Određivanje zbijenosti starog komunalnog otpada

    Jovana Janković, Dragoslav Rakić, Irena Basarić Ikodinović, Tina Đurić (2021)
    Bez obzira na savremene tretmane komunalnog otpada u svetu, u Srbiji je i dalje najčešći vid odlaganja na komunalne deponije, pa zbijanje otpada predstavlja jednu od ključnih faza formiranja deponije. Na ovaj način znatno se smanjuje zapremina otpada, ubrzava proces degradacije i produžava radni vek deponije. Zbog toga su geotehničke karakteristike komunalnog otpada prilikom zbijanja, veoma bitne kako u fazi projektovanja tako i u fazi izgradnje deponije i optimizacije prostora. Tu se pre svega misli na maksimalnu suvu zapreminsku ...
    komunalni otpad, deponija, Proktorov opit, optimalna vlažnost, maksimalna suva zapreminska težina

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... for creating, publishing and using course such as “Preparation for entry exam”. For example, [4]: 1) Improvement of the quality of learning materials through peer review processes and use of modern technology. 2) Innovation in the teaching process, openness and availability with low ...
    ... Tempus project BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology Enhanced Learning). This project has put together partners from Western Balkans and EU universities from Serbia, Montenegro, Bosnia and Herzegovina, Italy, Slovenia and Romania as well as two partners from industry ...
    ... 4) Personalization and localization by optimizing the deployment of institutional staff and budgets, and serving students in local languages. 5) Involving students in the selection and adaptation of OER in order to engage them more actively in the learning process. 6) Encouraging creation ...

  • 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
    ... Wydawnictwo Poznańskie Sp. z o.o, Poznań Tufiş, D. (ed.), (2004).: Special Issue on BalkaNet Project, Romanian Journal on Information Science and Technology. Bucureşti: Publishing house of the Romanian academy, Vol. 7, No.1-2. Vossen, P. (ed.) (1998).: EuroWordNet: A Multilingual Database with ...
    ... pages or web applications. This library is composed of simple web objects which perform “inline” search using numerous Google services (Web Search, Local Search, Video Search, Blog Search, News Search and Book SearchNew!). We have embedded a simple, dynamic search box and the search results ...
    ... International Conference on Language Resources and Evaluation, LREC 2006, Genoa, Italy, May 2006, pp. 1692-1697 Krstev, C., Vitas, D., Maurel, D., Tran, M. (2005). Multilingual Ontology of Proper Names. In Proc. of Second Language & Technology Conference, Poznań, Poland, April 21-23, Wydawnictwo ...

  • Evaluation of melioration area damage on the river Danube caused by the hydroelectric power plant ‘Djerdap 1’ backwater

    P. Pajic, L. Andjelic, U. Urosevic, D. Polomcic (2014)
    Water Science and Technology, Environmental Engineering

  • Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)
    Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...
    Rotorni bageri, revitalizacija, SRs1200

  • Application of Membrane Technology for Separation CO2 from Natural Gas

    Lola Tomić, Dušan Danilović, Vesna Karović Maričić, Branko Leković, Miroslav Crnogorac (2020)
    Natural gas consists of a mixture of hydrocarbons with the largest share of methane, and non-hydrocarbon impure components such as N2, CO2 and H2S. In order to fulfill the gas market requirements, it is necessary to separate these unwanted components from the natural gas stream. There are several available technologies for the separation of CO2 from natural gas, such as: polymeric membranes, cryogenic distillation, absorption and adsorption. In this paper is presented the mechanism of CO2 separation using membrane technology, ...
    separacija CO2, polimerne membrane, membranski moduli

  • A hydraulic–hydrochemical approach to impact assessment of a grout curtain on karst aquifer behavior

    Igor Jemcov, Marina Ćuk Đurović (2020)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... g), and hydrogeological investigation of the GUI Baba spring (Forrasbarlang). Dr. S. Milanović and Dr. lj. Vasić visited the University of Bulawayo (National University of Science and Technology - NUST) in Zimbabwe in July 2017. On that occasion, they gave lectures at the University and visited ...
    ... Vakanjac, and they were soon Joined by Branislav Petrović, a scholarship recipient of the Ministry of Science and Technology. During 2009, the team was strengthened by Ljiljana Vasić, at the time the secretary of the Department and at the same time a PhD student. In the following years, CKH members ...
    ... interesting karst phenomena in Zimbabwe (and Africa), the Chinoy Karst. Cooperation with the AGH University of Science and Technology from Krakow, Poland was established by Prof. Dr. V. Ristić Vakanjac in November 2019, when she gave lectures to undergraduate and masteT's students. This visit resulted ...

  • Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities

    Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov (2024)
    Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...
    полилексемске језинице, именовани ентитет, вишезначност значења речи, складиште смисла, LLOD

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... between CBR„ and the deformation modulus (E,, – E„») and dy- namic deformation modulus (Ey„) values obtained by field tests. Owing to its speed and ease of use, CBR, testing can become widespread as an alternative to the clas- sic method of quality control in the process of compaction and estimation ...
    ... 01-2145 (2001). 0. D. White, M. Thompson, and P. Vennapusa, Field Validation of Intelligent Compaction Monitoring Technology for Unbound Materials, Report No. MN/RC-2007-10, Minnesota Department of Transportation (2007). 1. DIN 18154, “Soil – Testing procedures and testing equipment – Plate load test” ...
    ... The deformation modulus E,,-E,, was determined using the load-unload-load process according to the DIN 18134: 2012-04 standard [11]. Approximately 1 hour was required to prepare and perform one test. After performing SPLT and collecting the required data, the subgrade reaction modulus (K,) was calculated ...

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)

  • Spatial–temporal assessment of hydrocarbon biodegradation mechanisms at a contaminated groundwater site in Serbia

    Nenad Marić, Jana Štrbački, Jason Polk, Latinka Slavković Beškoski, Jelena Avdalović, Marija Lješević, Kristina Joksimović, Aleksandra Žerađanin, Vladimir P. Beškoski (2022)
    General Earth and Planetary Sciences,General Environmental Science,Ecology,Ecology, Evolution, Behavior and Systematics

  • Using SEM-EDS for unveiling technology and provenance of Roman bricks and tiles in SE Romania.

    Moldovan Cristian, Ionescu Corina, Tentea Ovidiu, Šarić Kristina (2018)

  • Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides

    Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević (2021)
    ... BOGOVINA (SERBIA) AND POSSIBLE UTILIZATION IN SORPTION OF THE HERBICIDES Lazar M. Kaluđerović* 1, Zorica P. Tomić1, Rada Đurović-Pejčev2, Maja Milošević3 1Department for Soil Management, Faculty of Agriculture/ University of Belgrade, 2Laboratory of Chemistry, Institute of pesticides and environmental ...
    ... plays an important role in the sorption process of the soil. However, natural clay minerals are much better sorbents of inorganic than organic contaminants, such as nonionic pesticides. On the other hand, due to the high solubility, pesticides are mobile and could be detected in groundwater. Changing ...
    ... (Serbia) were pretreated with 1M NaCl, and then with different concentrations of two organic complexes (HDTMA, PTMA). Chemical analysis of the sample showed that natural montmorillonite from Bogovina (Serbia) was Ca montmorillonite.  The whole modification process was monitored using several methods ...

  • 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
    ... surface chemistry, and a high level of surface activity [33–35]. The major drawback of the conventional activated carbon-based adsorption process is the usage of non-renewable and relatively expensive raw materials (i.e., wood and coal), and therefore, it is still considered to be a high cost process with ...
    ... by processes on the surface and diffusion through the internal channels and the vacancies do not significantly effect the entire process. Author Contributions: S.K. participated in conceiving and designing experiments, characterization of samples, analyzing of results and paper writing; M.K. participated ...
    ... results indicate that both samples and especially AC@F–750–N2–1.0–KOH pose the potential to be used as a material for the production of Minerals 2018, 8, 246 13 of 21 collector filters for tailings. However, these results are just preliminary, and for practical applications, additional investigations on ...

  • 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

  • Improvement of Queries using a Rule Based Procedure for Inflection of Compounds and Phrases

    Stanković Ranka (2008)