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1482 items

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... properties and magnetoelectric effect in (x)Nip,s Zno.s Fe/Oa+(1—x)BPZT composites. Smart Mater. Struct. 2009, 18, 85013. [CrossRef] Curecheriu, L.P.; Buscaglia, M.T.; Buscaglia, V.; Mitoseriu, L.; Postolache, P.; lanculescu, A.; Nanni, P. Functional properties of BaTiOs-Nip sZno sFe2Oa magpnetoelectric ...
    ... OO \ o \HŽ·;·C«_–()–(A')–(H OO Oy-C—CxoO| 0 100 200 300 400 500 600 t["C] 20 . LAA 1300 •C 16| c ~_ A 14 a | _ r O O " = sl RuHENNEBRNRA | * BaTiO,NiFe,O, al N al * BaTiO„ZnFe,O, a .= —— BaTiO,INi, „Zn,,Fe,O, · *. FI n . A“A LE a O I LI I IL I OOO -d 100 200 300 400 500 600 ...
    ... the range of 20 and 30 kV. Mass magnetization measurements were performed according to a modified Faraday method using a laboratory weighing scale (Sartorius PRACTUM 124-1S) with a sensitivity of 107 kg and a magnetic field strength at the sample placement site of 50 kA/m. The heating rate was ...

  • 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
    ... gramm. data м item in a list Etymology palaiós kainós Open parenthesis + item in a list, e.g. „(грч.“ closing parenthesis Sense 1, 2, 3 or а, б, в or I, II or trigger begin terminological markers геол. item in a list trigger begin linguistic/markers / item in a list trigger begin related ...
    ... used to represent a particular sense of a lexical entry, and to 4 https://www.w3.org/community/ontolex/wiki/Final_Model_Specifi cation 5 http://www.lexinfo.net/ontology/2.0/lexinfo 6 / 9 947Lexicography in gLobaL contexts link a lexical entry with a set of senses ...
    ... con- vey and their position in the articles of the Dictionary, was performed. A feature structure, as a general-purpose data structure which identifies and groups together individ- ual features, each of which associates a name with one or more values, was mapped with the help of the aforementioned ...

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Advancing Sentiment Analysis in Serbian Literature: A Zero and Few-Shot Learning Approach Using the Mistral Model

    Milica Ikonić Nešić, Saša Petalinkar, Mihailo Škorić, Ranka Stanković, Biljana Rujević (2024)
    Ova studija predstavlja analizu sentimenta srpskih starih romana iz perioda 1840-1920, koristeći veliki jezički model (LLM) Mistral za tehniku učenja sa zasnovani na takozvanim "zero" i "few-shot" pokušajima. Glavni pristup uvodi inovacije osmišljavanjem istraživačkih upita (promptova) uključuju tekst sa uputstvom za klasifikaciju bez primera i na osnovu nekoliko primera, omogućavajući jezičkom modelu da klasifikuje osećanja u pozitivne, negativne ili objektivne kategorije. Ova metodologija ima za cilj da pojednostavi analizu osećanja ograničavanjem odgovora, čime se povećava preciznost ...
    zero-shot, few-shot, sentiment, Serbian, Mistral model

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... under Global Challenges and C-N in this compound are in a conjugation mode due to the distribution of double bonds and lone electron pairs (Liu et al., 2002). š š š F| ž Ž\ š L š a% 3 NaM-SM E |Eg \' 'KN z a N2 _ :1 k a ____NM /V \gp / a MNL J INRA ŠR 10'00 4000 3000 2000 Wavenumber (cm ) ...
    ... Kragujevac on a infrared spectrometer (Equinox 55, Bruker Optics) equipped with a single reflection diamond ATR accessory (Dura Sample IR II, SensIiR). The samples were prepared in a form of KBr disk, and the spectra (averaged on 32 scans) were collected in the range of 4000-450 cm'!, at a resolution ...
    ... ||gi a)ž 2nd dervate Š | b) JI š š |} š ii s e š H || i š } ž Š | e š - H H 1 a Fi i i NMA 41 “0 — s%0 ~ 300 ~ 3%0 __3MO _1%O0 _ 4M00 00 400 30 3000 3800 2000 Wavenumber (cm') Wavenumber (cm') šžg C), &h ı NA d) . HDTMA š A OE ii |} “ LIJPI | Mig ~FML_R “ š |- L šš s i s BOA A H || ...

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... enabled aquifer characterization of(1) a thin-layered, low-fissured aquifer closely related to the reservoir, with low influence on WMO transients; (2) a low- fissured, compartment aquifer or non-aquifer with minimal to no influence on WMO transients; (3) a well-structured karst aquifer system ...
    ... system: A case study HPP Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study ...
    ... tunnel on the complex hydrogeological system: A case study HPP Pirot, Serbia Igor Jemcov ”, Maja Todorović ', Aleksandar Jemcov P, Marina Ćuk Đurović ? 2, i Show more V — Addto Mendeley < Share 5 Cite https://doi.org/10.1016/j.jhydrol.2024.132068 A Get rights and content 2 Highlights • ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... Ristié 19, Ana Tomié 1, Aleksandra Ranitovié !, Dragoljub Cvetkovié 1 and Sini§a Markov ! check for updates Citation: Sovljanski, O.; Pezo, L.; Stanojev, J.; Bajac, B.; Kovaé, S.; Toth, E.; Ristié, I.; Tomié, A.; Ranitovi¢, A.; Cvetkovié, D.; et al. Comprehensive Profiling of Microbiologically Induced ...
    ... biologic systems. y(t) = d + a − d 1 + ( t c )b (4) In Equation (4), y(t) presents pH values or numbers of viable cells, a and d represent the minimum and maximum value that was obtained, respectively, c refers to the inflection point (the point on the S-shaped curve between a and d, while b is the Hill’s ...
    ... Standard Score Analysis, five bacterial strains were selected as potentially a suitable choice for the MICP process. The selected strains had a standard score (rang of samples according to the deviation and the mean) of 0.996, while a standard score for S. pasteurii DSM 33 and B. pseudofirmus DSM 8715 are ...

  • 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

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    reclamation, coal, sustainable development, multi-criteria decision making, VIKOR method

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... Unit weight W a of solid A kN/m* E i ——— particles Vs 1-n 'Volume water v m*/m* v= V Zw.J0 content -% V Yw Volume gas a m*/m* a _&_ n_w content -% a Saturation g m*/m* S =&=X degree ii -% ii Vp The three-phase system for municipal waste does not take into account a fact that the composition ...
    ... allows to determine basic physical parameters in a certamn stage of degradation and to display their change, if the initial conditions are known. beforc h·odcgrudaum'\ , iibeć- air (a) h, biodegradation Ž::·'l AhA FB, w water(v) h, j air(a) f water (v) Fig. 3. Phase system change of municipal ...
    ... degradation stage no, n — initial porosity and porosity in a certain stage of degradation Wo, W — initial moisture and moisture content in a certain stage of degradation. 3 BASIC INDICATORS OF PHYSICAL STATE In the paper, a three-phase system of waste was adopted and organic particles ...

  • Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes

    Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić (2011)
    Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...
    Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
    ... 12, 34000 Kragujevac, Serbia a r t i c l e i n f o Article history: Received 29 July 2011 Received in revised form 28 October 2011 Accepted 9 November 2011 Available online 19 November 2011 Keywords: Pd(II) Substitution Kinetics Mechanism Reactivity a b s t r a c t Substitution reactions of the ...
    ... 0.5 24 ± 2 / / a Ref. [24]. Fig. 2. Pseudo-first order rate constants, kobs, as a function of ligand concentration and temperature for the substitution reactions of [(TLtBu)PdCl]+ complex with I� in 0.1 M NaClO4 and 10 mM NaCl. Fig. 3. Pseudo-first order rate constants, kobs, as a function of ligand ...
    ... results clearly illustrate that a relatively small structural modification of the tridentate ligand has a strong influence on the reactivity of the complex. In order to determinate the affinity of [(TLtBu)PdCl]+ and [Pd(tpdm)Cl]+ complexes towards studied nucleophiles, a Linear Free Energy Relationship ...

  • Effects of external noise on threshold-induced correlations in ferromagnetic systems

    Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević (2021)
    Изингов модел, праг детекције, екстерни шум

  • 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

  • Geotechnical conditions of “Debelo brdo” tunnel construction on the highway E-80: Nis-Merdare-Pristina (“Peace Highway”)

    Dragoslav Rakić, Irena Basarić Ikodinović, Radojica Lapčević, Dragan Lukić (2024)
    The construction of the highway E-80 has begun in Serbia, which will represent the traffic hub of the Western Balkans and will be part of the main regional transport network of Southeast Europe. Its total length through Serbia is 77 km, and one part of the route is designed through a typical plain terrain, while a larger part of the route passes through hilly terrain. The construction of the tunnel “Debelo brdo” is planned partly in an open cut ...
    „Debelo brdo“ tunnel, temporary slopes, open cut excavation, tunnel excavation, piles

  • Strukture kristala - odabrana poglavlja iz kristalografije i njena multidisciplinarnost

    Ljiljana Karanović (2024)
    Kristalografija

  • Анализа рада дисконтинуалног система на основу симулације утовара и транспорта целог површинског копа

    Милош Јовановић (2024)
    У овом раду анализира се рад дисконтинуалног система утовара и транспорта на површинским коповима користећи софтверски пакет Haulsim. Циљ истраживања је побољшање ефикасности процеса транспорта и оптимизација коришћења ресурса. Симулација је спроведена за различите сценарије утовара и транспорта, укључујући варијације у броју возила, њиховој брзини, капацитету, као и рутама транспорта. Добијени резултати су показали значајне могућности за унапређење постојећих процедура и смањење трошкова. Дисконтинуални системи су сложени и захтевају пажљиву анализу како би се постигла максимална продуктивност и смањење ...
    анализа, симулација, оптимизација, ефикасност, Haulsim
    ... aaaaaaaaa a aaaaaaaaeaaa a a aa a a a aataaaaaatveNı 58 Ta0euna 5.4. KoopnuiHaTe HCTOBApHOr MCCTa a aaa a a a aaaaa a aaeaaaaa a taataaatNoNı 59 Ta0ena 5.5.IInaHupaHu pacrnopc;i Garepa ro pazuinuntTHMa H HOje/UHHauHH KamalHTeTH a 60 Ta0ena 5.6. PeaynrrarH aHajiH3c CHCTCMAa O altyaa a ananaaaaa ...
    ... KamMKap a aeaaaanaaae a a a a a a eaaaa a taoaataaatNoVı 19 Cyka 2.9. ZlaMnep Belaz 75131.aaaaaaaaaaaaaaa da aaaaaaeaaa a aa a aeaaa a taaaaaaatNoNı 23 Cyjka 2.10. /laMitep ca KOMOHHOBAHHM JUH3CJI-TpOJI IIOTOHOM.aaaaaaaa a aaaaaaaaataoaaaakaoNoNı 25 Cjka 2.11. HleMce Kperatba KaMHOHAa a aaaaaaa ...
    ... aeaaaaea a a a aaa a aaaaaaaettVı 27 Cjmka 4.1. 3D MojieJt TepeHa lt a a aaaaea a a aaaeaaaa a aaaaaaa a a aataoaaaaatatNoVı 36 Cyka 4.2. Hnirzten naHena Materials — kapakrepHcTHKC JaJIOBHHC ly aaanaaaaaaaakatotı 37 Cuka 4.3. Hnirzejn naHena Materials — kapakrepHcTHKE yrJba al aaaa a aaataaaaaaatNttı ...

  • 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
    ... ti Wb a yJ ba K o n n u n H a H 3 M H H H p a H o O r Cp ej ub a Jn yk HH a T p a H c n o p r a K a n a u u r e r K a M u H o H a (3 a /I Ba Y k y n H o Bp eM e yr oB ap a H Uu ac oB Ha no Tp ot im ba ro pH Ba Il or po mi »3 a r o p u B a 10 ...
    ... re pu ja jn a Tp au Hc no pr a C H a r a Mo To pa TI or po ur t» 24 ry Ma I I o r p o m i m a yj ba o r o H u M a r e p u j a j a Cp en mb a 0p 3u Ha Ho cu go cr T Ka tt nk e K a M H O H a y CM eH H) no T O H H M a T e p u j a j a -| s F i ...
    ... cTy0a: E5:a P H:y+E-h-yı < ki 25 · 4814,10 225 · 36 · 2,67 + 25 · 8 · 3,21 < ——— 22269 < 27847 -ycJtOB HcIIyPeH IIpopauyH crpaHune KBajipaTHor cry06a: A Oc' kf kl·H·y—1 10,0 a = – IE __— __ — =2),88 [m] a 000 —ı 2,0 · 36 · 2,67 Ive Je: h8 [m]; H= 36 [m]; A=10 [m]; a—5 [m]; ...

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... Tesla A (PPNT A) in Obrenovac. This paper presents the pozzolanic, mechanical, chemical and mineral composition and properties of fly ash obtained in the combustion process in a PPNT A with the addition of a binder hydrated lime and cement. Tests were performed after 7 and 28 days in a humid ...
    ... mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a binder hydrated lime and cement. The aim of research is to test the possibility of using the fly ash from PPNT A for making elements of road structures (top and bottom layers of ...
    ... without the addition of binders, - a sample with the addition of 2 % of binder, - a sample with the addition of 4 % of binder, - the sample with the addition of a binder 6 % (hydrated lime and cement). The mineral composition of fly ash and slag from PPNT A is determined from the diagram of ...

  • Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study

    Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)
    Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...
    Pharmaceutical Science
    ... was performed using a Nicolet iS10 (Thermo Scientific, Wal- tham, MA, USA) FT-IR spectrometer equipped with a single reflection ATR system (Smart iTR, Thermo Scientific, USA) with diamond plate and ZnSe lens. Spectra were recorded in the range of 4000 cm ! to 660 cm ! with a resolution of 0.5 cm ...
    ... (XRPD). The analysis was performed on a Rigaku Smartlab X-ray diffractometer in a 0-0 geometry using the D/teX Ultra 250 strip detector in 1D standard mode with a CuKou „ radiation source (U=40 kV and I=30 mA). Data were acquired in a 20 range of 3-40% using a low background single crystal silicon ...
    ... of the lyophilzates was analyzed by scanning elec- tron microscopy (SEM). A small amount of the sample was placed on a conductive double-sided adhesive tape and examined with a Zeiss Ultra Plus 55 or Zeiss DSM 940 A microscope (Carl Zeiss GmbH, Oberkochen, Germany). Photomicrographs were taken ...