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Упит dcterms_creator_txt:Vučković D.

914 items

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... 3400 3575 ___ ——— s ___ _— d) |--7" - — 3740 d)) c |-- ——· —— — I r — TTAA K_ s Fi 3670 -i 3220 3400 3555 8, 5 _ -. ——\ b) 3 —— \ <| _ — c) WJE — Y | ___ \ 3) T T T T ı 3000 3250 3500 3750 4000 Wavenumber / cm" Figure 4. FTIR ATR spectra of samples (a-d) (see Figure 1) in the O-H/H»O ...
    ... are found in samples a, b and d, while albite is found only in samples a and b. Crocidolite is found in samples b and d, while tremolite is found in samples b and c. Diopside and orthopyroxene are found in samples b and c, while talc is found in samples c and d. Minor abundant mineral phases noticed ...
    ... [13]. Figures 3 and 4 show representative FTIR ATR spectra collected on powdered fragments of the shards. Spectrum d/ has been recorded on a fiber bundle extracted from sample d. The bands, for instance, the Si-O stretching, and bending, modes at ~960 (1015 and 1080) and 620 cm-! (Figure 3), ...

  • Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija

    Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić (2015)
    Biougalj se dobija pirolizom iz organskog otpada. Smatra se ,,modifikatorom'' zemljišta i koristi se kao đubrivo i kao rezervoar za skladištenje ugljenika. Kvantifikacija funkcionalih grupa je važna zbog hemijske reaktivnosti biougljeva koji imaju uticaj na svojstva zemljišta. U istraživanju su korišćena 3 uzorka biouglja različitog porekla i jedan referentni, aktivni ugalj. Sadržaj kiselih funkcionalnih grupa je određivan titracijom po Boehm-u na dva načina: uvođenje N2 tokom titracije i tretman sa BaCl2. Optimizovan je način pripreme tri Boehm ova rastvora ...

  • Polyhedral characteristics of the cosalite-type crystal structures

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)
    kristalna struktura, kozalit, poliedarske karakteristike
    ... IA T IO N O F M E A N P O L Y H E D R A L M e – S D IS T A N C E S (Å ) A S A F U N C T IO N O F P O L Y H E D R A L D IS T O R T IO N D (% ) B i1 B i2 B i4 M e 2 M e 3 M e 1 P b 3 P b 4 D , R . D , R . D , R . D , R . D , R . D , R . D , R . D , R . 1 T re p č a I 0 .4 5 6 2 ...
    ... -C E L L P A R A M E T E R S A N D C H E M IC A L C O M P O S IT IO N B A S E D O N 2 0 S a p fu F O R C O S A L IT E S A N D IS O S T R U C T U R A L C O M P O U N D S S a m p le L o c a lit y R e f C h e m ic a l c o m p o s it io n c a lc u la te d o n th e b a s is o f 2 0 s u lf ...
    ... O p e n D a ta b a s e (d a ta _ 1 0 1 0 7 7 2 ). It s h o u ld b e n o te d th a t in th e a rt ic le o f S ri k ri s h n a n & N o w a c k i (1 9 7 4 ) s lig h tl y d if fe re n t u n it c e ll p a ra m e te rs (a ¼ 1 9 .0 7 , b ¼ 2 3 .8 7 , c ¼ 4 .0 5 5 Å ) w e re s p e c if ie d fo r th e ...

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... white rectangle. Cretaceous Research 151 (2023) 105623 Z. Vašiček, D. Rabrenović, P. Skupien et al. STIOJMOU NO|HJHOLUQTIS| snuo/ide|Jeuie|e|}huoy\ —*- snjouip s n u o / g d e y u n d ) 2 u l ) snjejound s n u o / Q d e ) o u n c OjSIJeoqns BiJejeJe5o} — esueuo/(ouq seje2oouanojsqns ...
    ... such specimens, the diameter of the shell, D, for which the measurement was made to one-tenth of a mm (or Dmax, indicating the maximum preserved shell size), as well as the height of the whorl (H), width of the umbilicus (U), and the ratios of H/D and U/|D are given in paren- theses. The width of ...
    ... qns ___ee- snjejnojossj sojtuejdqnsopnescj —___e- IJouoj s e j u u e J j d q n s o p n o s c e e e — - Jedse '}o SeJeO!SOqJE}/ • uunojojd '} SeJaolJeJ5aN • s n o n u o d ·}o s e j i u p / d q n s o p n e s c ___ __e-– _ – I I uunujuu SeJeoiJeuBeN- 'ds sejiue/u00g ...

  • Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS

    Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan (2021)
    Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...
    agregatne zamene, održavanje, mehanizacija, Benefit Cost analiza
    ... is te m P o lj e B /C : B T S P o lj e D : B T U P o lj e D : B T S P o lj e G : B T D T Z P : I B T D T Z P : II B T D T Z P : II I B T D T Z P : IV B T D D rm n o : B T D UK up na is ko riš će no st [% ] Sistemi na otkrivci Sistemi ...
    ... I B T O s is te m R a d lj e vo : I B T O s is te m D rm n o : I B T O s is te m D rm n o : II B T O s is te m D rm n o : II I B T O s is te m D rm n o : IV B T O s is te m D rm n o : V B T O s is te m D rm n o : V I B T O s is ...
    ... : II B T O s is te m T Z P : II I B T O s is te m P o lj e D /E : Iа B T O s is te m P o lj e D /E : II B T O s is te m P o lj e D /E : IV B T O s is te m P o lj e D /E : V B T O s is te m P o lj e B /C : I B T O s is te m P ...

  • Organoselenium functionalized oxacycles as ligands in some trans-palladium(II) complexes: biological evaluation and interaction with small biomolecules

    I. Raković, D. Ćoćić, O. Milošević-Djordjević, I. Radojević, M. N. Živanović, K. Virijević, J. Pavić, J. Tubić Vukajlović, A. Marković, J. S. Marjanović, M. D. Kostić, P. Čanović, A. Mijatović, V. M. Divac (2023)
    In this article, the biological evaluation and interaction of three selenium-based trans-palladium complexes (Pd–Se1, Pd–Se2, and Pd–Se3) with small biomolecules were performed. The UV–Vis kinetic studies on substitution reaction of synthesized complexes with selected biologically important N- and S-bonding ligands (LCys, GSH, L-Met, 50-GMP, L-His) has emphasized greater affinity of sulphur-based ligands for complex-binding, while the general order of the reactivity was L-Cys > GSH > L-Met > 50-GMP > L-His. The complex reactivity toward small biomolecules is influenced ...
    Materials Chemistry, Physical and Theoretical Chemistry

  • Дефинисање механичких својстава алтерисаног стенског материјала лабораторијским методама

    Вељко М. Рупар (2022)
    Основни циљ овог рада је да представи методологију одређивања механичких својстава хетерогеног стенског масива који изграђују дацит (Д) и алтерисани дацит (АД), где је уочена је зона постепеног преласка од алтерисаног дацита до дацита. Механичка својства стенског масива у тој зони утврђена су на основу лабораторијских испитивања једноосне и троосне чврстоће на притисак стенског материјала композитних узорака. Композитни узорци су се састојали од дискова стенског материјала, при чему је висина дискова h дефинисала различити процентуални удео појединог стенског материјала, ...
    дацит, алтерисани дацит, једноосна чврстоћа на притисак, троосна чврстоћа на притисак, композитни узорци, механика стена, стабилност косина

  • Osnovi hidrogeologije

    Petar Dokmanović (2021)
    hidrogeologija, atmosferska voda, površinske vode, podzemne vode, vodni bilans, poroznost stena

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics
    ... full curve fitting of the integrated size distributions of nonspanning avalanches to the function D(S) = S−τ ′D ( S S0 ) , (D.1) with the exponential cutoff D ( S S0 ) = AS exp ( − S S0 ) , (D.2) chosen as the simplest form of the cutoff function that is appropriate for our data in the employed ...
    ... cutoff ended power-law D(S) = S−τ ′D ( S S0 ) , (4) https://doi.org/10.1088/1742-5468/ac1f12 6 J . S ta t. M e c h . (2 0 2 1 ) 0 9 3 3 0 1 The effect of finite driving rate on avalanche distributions where τ ′ is the pertaining effective size exponent [48], while D(x) and S0 are the cutoff ...
    ... ters a = (21.99±1.77)103, b = (37.4±0.55)106, c = −6.99±0.02 and d = 0.10±0.01. Using (D.1) with (D.2), we have also qualitatively estimated the variation of the exponent τ ′ with the driving rate Ω, and found that τ ′ (as well as the exponents of other avalanche parameters, see appendix C) varies with ...

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)

  • Rezultati probnog ispitivanja geotehničkih prenapregnutih sidara u Užicu (Stari grad)

    Vladimir Kovačević (2024)
    Za potrebe izrade završnog rada na četvrtoj godini Rudarsko-geološkog fakulteta, studijskog programa Geotehnika, pod mentorstvom doc. dr Zorana Berisavljevića, odabrana je tema „Rezultati probnog ispitivanja geotehničkih prenapregnutih sidara u Užicu (Stari grad)“. Osnovni metodološki pristup koji je korišćen za rešavanje postavljenog problema predstavlja kabinetsko istraživanje dostupne dokumentacije, analiza i interpretacija rezultata izvedenih geoloških,geotehničkih i geomehaničkih istraživanja. Predstavljene su osnovne informacije,karakteristike i upotreba prednapregnutih geotehničkih sidara.Analiziran je tok testiranja granične nosivosti prednapregnutih sidara. Na osnovu izvršenih geotehničkih istraživanja terena i ispitivanja ...
    geotehnička istraživanja, prednapregnuta sidra, nosivost sidra, standard SIA V 191
    ... ? L L / L L S O A I S O N M N N O I N V ? H D .LSŠLL – V M V G I S O f N V A L L I d S I T W O N T O H . L N O N M O M I N S I d V Z ĐNISSHNH.LSHNHd G N V SMMn.LOnbiLLS H O N O L I N M O - H r N V Z H N H d V N G H H 4 d I W F I O Ž T ? L L S N O N M VZ M V . L ...
    ... Golsvordijeva 36, B e o g r a d Projektant: U N I V E R Z I T E T U B E O G R A D U , R U D A R S K O - G E O L O Š K I F A K U L T E T Beograd, Đ u š i n a 7 Tehnička dokumentacija: G E O T E H N I Č K I E L A B O R A T ZA P O T R E B E I Z G R A D N J E P E Š A Č K O G ...
    ... G M O S T A K O D S T A R O G G R A D A U UŽICU N a z i v priloga: R a z m e r a : | D a t u m : O d g o v o r n i projektant: Potpis: Br. Priloga: SITUACIJA SA POLOŽAJEM ISTRAŽNIH RADOVA | 1:500 · |Januar2022 „___N_„š_ma_s,\:mš_ ž ćya2626 — | E1 ...

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... triangular fuzzy number, the fuzzy synthetic extent is calculated using; the following; equation: m i n m -1 m m m 1 1 1 S -Ž MLe|.2.MA, |Ž,D-> 552 d|| _—R — L — j=1 i=1 j=1 jel jcl je1 Mdj XOsj M i=l i=l i=1 Step 3. The degree of possibility of two triangular fuzzy numbers is deter- mined ...
    ... its application to pproximate reasoning,, Information sciences, 8, 199—249. Š| CHANG D. Y. (1996) Applications of the extent analysis method on fuzzy AHP, Rur. J. Oper. Res., 95, 649 655. “} ZnU K., Y. JING, D. CHANG (1999) A discussion on extent analysis method and applications of fuzzy AHP, Eur ...
    ... Fuzzy Logic in Data Mining Process. In: Bai Y., Zhuang H., Wang D. (eds), Advanced Fuzzy Logic Technologies in Industrial Ap- ications, Advances in Industrial Control, London, Springer, DOT: 10.1007,978-1- 84628-469-4 _17. BAJIĆ S., D. BAJIĆ, B. GLUŠČEVIĆ, V. RISTIĆ VAKANJAC (2020) Application of ...

  • Хазард од клизишта у Србији у 21. веку

    Biljana Abolmasov (2019)
    клизишта, хазард од клизишта, промене климе

  • NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands

    Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)
    Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...
    Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry
    ... complex, d (H6- bipy) = 9.86 ppm; d – unsubstituted complex, d (H6-bipy) = 9.56 ppm). Fig. 7. 1H NMR spectra of the reaction of [Ru(terpy)(bipy)(H2O)] 2+complex (4 mM) and GSH (4 mM) in D2O at 295 K, pH 7.4.(j – substituted complex, d (H6- bipy) = 10.13 ppm; d – unsubstituted complex, d (H6-bipy) ...
    ... of the reaction between [Ru(terpy)(bipy)(H2O)] 2+ complex (4 mM) and L-Met (4 mM) in D2O at 295 K, pH 5.3. (j – coordinated L-Met, d (CH3(s)) = 2.76 ppm; d – free L-Met, d (CH3(s)) = 2.14 ppm). A. Mijatović et al. / Inorganica Chimica Acta 394 (2013) 552–557 555 at 3.08 ppm for free and at 3.31 ppm ...
    ... Ligand d (ppm) H6-bipy free H6-bipy substituted L-Met 9.56 9.86 L-Cys 9.56 9.86 GSH 9.56 10.13 Thiourea 9.56 10.13 Table 2 The chemical shifts for some suitable protons of sulfur donor ligands during the substitution reactions with [Ru(terpy)(bipy)(H2O)] 2+ at 295 K, pH 7.4. Ligand Group d (ppm) ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen
    ... 881–901. Pigott, J. D., and D. Radivojević, 2010, Seismic stratigraphy based chronostratigraphy (SSBC) of the Serbian Banat region of the Pannonian Basin: Central European Jour- nal of Geoscience, 2, 481–500, doi: 10.2478/v10085-010- 0027-2. SB74 Interpretation / February 2018 D o w n lo ad ed 0 ...
    ... seismic line after shifting for fault movement (movement is marked with dashed white line), and (d) interpreted seismic line according to lithostratigraphic units (formations). SB70 Interpretation / February 2018 D o w n lo ad ed 0 2 /0 5 /1 8 t o 2 1 6 .6 3 .2 4 6 .1 6 6 . R ed is tr ib ...
    ... 17–28. Csató, I., D. Granjeon, O. Catuneanu, and G. R. Baum, 2013, A three‐dimensional stratigraphic model for the Messi- nian crisis in the Pannonian Basin, eastern Hungary: Ba- sin Research, 25, 121–148, doi: 10.1111/j.1365-2117.2012 .00553.x. Csató, I, S. Tóth, O. Catuneanu, and D. Granjeon, 2015, ...

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem

  • Испитивање могућности флотирања церузитне руде из лежишта Олово - БиХ

    Славко Тодић (2024)
    Овај завршни рад заснива се на испитивању могућности флотирања церузитне руде из лежишта Олово - БиХ. У циљу свеобухватног испитивања и добијања што прецизнијих резултата, у општем делу рада представљени су географски положај и историјат, како рудника, тако и општине Олово, затим геолошка грађа подручја, минерални састав лежишта и његове структурно-текстурне карактеристике. Такође, у овом делу рада дат је и кратак увид у минералошку анализу руде из лежишта Олово, те опште карактеристике корисних минерала церузита/англезита и калцита као основне некорисне ...
    церузит, сулфидизација, флотацијска концентрација
    ... peazencu: Na„S, KAX u D-200; -yYkynaa nompouuba peazenaca: > Na(1500 g/t) > KAX(200 g/t) > D-200 (110-190 g/t) -Mecma O0ooasatba peazenaca: > KonOuuyuoupae (Na,S, KAX, D-200) > Ipy6o u kohmpojnno (baomupatbe(KAX, D-200) > IIpao npeuuuhasatbe (D-200) > lpyeo npeuuuhasanme (D-200) »> -Tpu onuma ...
    ... (imorarmujcKoj MammiHH D-I2“Denver Sub-A“ ca ynyBaBamĐeM Ba3myXa y hemaja aanpeuHe 2,8 dm? npu 6pojy oOpraja Mmenepa o 1500 rpm. Y neroM MuHyry rpyGor (inorapama nonara cy KAX (50 g/t) a D-200 (40 g/t). Ha nouerky KoHTpojHor (bnrorupamba oJ peareHaca momaru cy KAX (50 g/t) w D-200 (10 g/t) TokoM omra ...
    ... na6opamopujckoj (dnomauujckoj awuHu D-12"Denver Sub-A4" y henuju sanpeMune 2,8 dm npu Opojy oOpmaja uvnenepa oO 1500 rpm. PeoocneoO Oodasama peazenca: Na,S—-SKA4XY—D-200. Konmponucan pH na nouemky u Ha Kpajy koHOuuuoHupatba. na6opamopujckoj (dnomauujckoj awuHu D-12"Denver Sub-A4" y henuju sanpeMune ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials