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Упит dcterms_subject_txt:Raw materials

365 items

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... Prijedor). BAEKTEL platform is developed in order to enable higher education (HE) institutions to publish their course materials (video lectures, course planning materials and evaluation tools as well as thematic content).The ICT solution includes several components:  OER repository on local ...
    ... various types of institutions, both academic and entrepreneurial, in different countries. The main task of the project is to produce course materials in various languages, but mainly in Serbian, both in video and audio format, but also in written form as parallel (multilingual) corpora of lessons ...
    ... Named Entity Recognition System for Serbian is presented as an illustration. Didactic criteria Course combines different types of learning materials having in mind three basic didactic criteria [15]:  adjusting the content to the target group,  systematization and gradualism in the teaching ...

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... improved layer made of coarse-grained gravel or sandy material and together with the protective layer forms frost protection [3:4-5]. Clay materials and materials that can be compacted and consolidated cannot be installed in the transition layer. The surface of the transition layer meets the conditions: ...
    ... [1:11-11]. 2.2. REGULATIONS FOR MAIN RAILWAYS ("OFFICIAL GAZETTE OF RS", NO. 100/2012) These Regulations define the minimum quality requirements for materials installed in the layers of the substructure. The minimum requirements are prescribed by the values of the degree of compaction Rc*, ie the values ...
    ... values of the deformability modulus Ev2 whose definition is contained in SRPS U.E1.010, ie in DIN 18134. The criteria to be met by the materials installed in the protective and transition layer are given in Table 2, while the criteria for embankments are given in Table 3. Table 2. Minimum value of de ...

  • 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

  • Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process

    Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)
    Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...
    DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker
    ... tackling, water contamination, and advanced oxidation processes (AOPs) [14,15]. However, to achieve easy operation, low equipment cost, and cheap raw materials, AOPs are highly desirable. In addition, AOP, such as photodegradation, is considered most commonly used due to its ability to remove most organic ...
    ... Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, 21000 Novi Sad, Serbia 2 · Centerfor Solid State and New Materials, Institute of Physics Belgrade, 11000 Belgrade, Serbia Laboratory of Crystallography, Faculty of Mining, and Geology, University of Belgrade, Đušina ...
    ... electron microscopy (SEM), X-ray, and Raman spectroscopy. SEM micrographs showed hexagonal-shaped platelets with well- defined morphology of materials with diameters in the range of 10–65 ım and thickness of around a few microns. X-ray diffraction identified only one crystalline phase in the sample ...

  • 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
    ... deformation modulus, and dynamic deformation modulus values obtained by field tests. Introduction The compaction and bearing capacity of natural materials are the most important indicators that must be satisfied during the construction of the foundation layers of pavements. Control procedures are used ...
    ... extremely underrepresented in the literature, probably owing to the low preva- lence of this method worldwide. The first CBR, study considered mineral materials for roads [1] and report- ed good correlation between static and dynamic test results. A previous CBR, study [2] has presented re- sults for ...
    ... of results obtained under different conditions, and the dependence between the parameters can be consid- ered to evaluate the suitability of materials and the compaction and load capacity in road construction. In the present study, this device was used for measurements in the laboratory and at ...

  • Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure

    Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)
    ... _aonauue MHayka Ss. Cyril and Methodius University, Skopje 26th Congress of Chemists and Technologists of Macedonia Keywords: Alkali activated materials, kaolin, fly ash, XPS, HR-TEM, natural radioactivity ICTM P-3 Investigation of CoooHoo. MoOu Nanopowders Obtained by Glycine Nitrate Procedure ...
    ... photocatalytic processes toward green chemistry and sustainable development. Keywords: X-ray diffraction, Electron microscopy, Nanostructured materials -– 23- ...

  • Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu

    Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić (2022)
    Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...
    flotacijsko jalovište, makroelementi, magnetna merenja

  • Particulate basalt–polymer composites characteristics investigation

    Todić Aleksandar, Nedeljković Blagoje, Cikara Dejan, Ristović Ivica (2011)

  • XRD and SEM analysis of urinary stones

    Miljević Miljana, Rosić Aleksandra (2010)

  • Mechanical Properties of Microwave sintered Hzdroxzlapatite (HAP)

    Mirković M., Došen A., Rosić Aaleksandra, Matović B. (2015)

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... on the Critical Raw Materials for the EU 2023, o0jaa;beHo oO cmpaHe Eaponcke KoMucuje Copper 28% Cauka 5. Ipuka3 aeMa:ba ca HajsHauajHuju yOenoM cHa00e6ahba ca KpumuuHu e/teMeRmuMa Ha c6emcKoM mp2oicuuam)y. Hsaop: Cnuka je npeysaema us paoa: Study on the Critical Raw Materials for the KU 2023 ...
    ... Study on the Critical Raw Materials for the EU 2023, o0jaa/beno o0 cmpane Esponcke koMucuje Cauka 10. IHpuka3 seMa:ba ca najsHauajnuju yOeno cRa60esama ca KpumuuHu.M e/teMeHmuMa Ha ceemcKoM mp2icuuamy. Hsiaop: Cnuka je npeyaema us pada: Study on the Critical Raw Materials for the EU 2023, o0jaa/beno ...
    ... OunnoMcku pao paben je y okaupy npojekma ,, Zero waste reprocessing of EAF and CF dust with competence build-up“ koju ce ounancupa cpeocmauwa „EIT Raw Materials“, mena EY u y capaoObu ca uhemumymow „„Jožef Stefan “koju je sodehu Cnosenauku HayuHo-ucmpaojcueauku ueHmap y pa3jluuumu.M mneXHOJIOMAKU,M ...

  • Affordable Photogrammetry as Applied in the 3D Modelling and Monitoring of Underground Mining Exploitation and Transport

    Ristović Ivica, Vulić Milivoj (2014)

  • Structural, morphological and up-converting luminescence characteristics of nanocrystalline Y2O3:Yb/Er powders

    Mančić Lidija, Lojpur Vesna, Vulić Predrag, Rabanal Maria Eeugenia, Dramićanin Miroslav, Milošević Olivera (2012)

  • Mogućnosti primene tvrdih legura za sečiva bušaćih kruna u rudarstvu

    Bajić Sanja, Gaćina Radmila, Trajković Slobodan, Tokalić Rade (2012)

  • Phase, morphological and statistical analysis of urinary stones from Serbian patients.

    Mirković Miljana, Dosen Ana, Matović Branko, Erić Suzana, Vulić Predrag, Rosić Aleksandra (2018)

  • Superstructure of Mullite-type KAl9O14

    Lazić P. Biljana, Krueger H., Kaindl R., Perfler L., Kremenović Aleksandar, Cvetković Vladica, Withers R.L. (2013)

  • Improved compressive strength of alkali activated slag upon heating

    Nikolić Irena, Karanović Ljiljana, Častvan Janković Ivona, Radmilović Vuk, Mentus Slavko, Radmilović Velimir. (2014)

  • Analysis of the SCI, SCI-E and SSCI Journals in the Fields of Mining Transport, Haulage and Hoisting.

    Ristović Ivica, Dašić Predrag, Dašić Jovan (2014)

  • Electrodeposition of silver powder from nitrate electrolyte for usage in electronic

    Ivanović Aleksandra, Dimitrijević Silvana, Dimitrijević Stevan, Trumić Biserka, Marjanović Vesna, Petrović Jelena, Vuković Nikola (2012)

  • (3+1)-Incommensurately modulated crystal structure of Cs3ScSi6O15

    Hejny Clivia, Kahlenberg Volker, Schmidmair Daniela, Dabić Predrag (2016)