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Упит dcterms_subject_txt:TE ,,Kostolac B’’

871 items

  • Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

    Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)
    Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... grade ‘B’. For indicator M he assigned 40% to grade ‘A’ and 60% to grade ‘B’, while for indicator S, he assigned to grades ‘A’ and ‘B’ 30% to 70%, respectively. The other five machines were also evaluated following the same methodology, and the results are shown in Tables 4 and 5. Table 4. Results of ...
    ... terms of time and work organization. Diagnosis is simple. Repairs are quick. No corrosion. Defective parts are not of a large mass. It is possible to plan time and work organization. • ‘B’(M)—Quick identification of weaknesses is possible (errors, faults . . . ). It is constructively easy to repair ...
    ... procurement.   O (a) (b) Figure 4. Comparative analysis of all bulldozers availability and analysis according to different models. (a) for all of the analysed machines; (b) for machines according to manufacturer. Energies 2019, 12, 4044 16 of 18   O (a) (b) Figure 5. Comparative ...

  • 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

  • Seasonal Variations of the Zapadna Morava River Water Quality

    Nebojša Đ. Pantelić, Jana S. Štrbački, Goran Marković, Jelena B. Popović-Đorđević (2021)
    The water samples collected from four localities of the middle course of the Zapadna Morava River during 2020 were analyzed via the selected physicochemical parameters with the aim to estimate the quality of surface water. According to the results of selected physico-chemical parameters (pH, conductivity, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand), analyzed surface water show a good chemical status, while the values of nutrient content (nitrate, nitrite, ammonium ion, total phosphorus) indicated the poor chemical status especially ...
    water quality, dissolved oxygen, ammonium ion, total phosphorus

  • Microscopical characterization of carbon materials derived from coal and petroleum and their interaction phenomena in making steel electrodes, anodes and cathode blocks for the microscopy of carbon materials working group of the ICCP

    Predeanu G., Panaitescu C., Bălănescu M., Bieg G., Gómez Borrego A., Diez M.A., Hackley P., Kwiecińska B., Marques M., Mastalerz M., Misz-Kennan M., Pusz S., Suárez Ruiz I., Rodrigues S., Singh A.K., Varma A.K., Zdravkov A., Životić Dragana (2015)

  • Identification of alginite and bituminite in rocks other than coal: results of Round Robin Exercises of the Identification of Dispersed Organic Matter Working Group of the ICCP

    Kus J., Araujo C.V., Borrego A.G., Flores D., Hackley P.C., Hámor-Vidó M., Kalaitzidis S., Kommeren C.J., Kwiecińska B., Mastalerz M., Mendonça Filho J.G., Menezes T.R., Misz-Kennan M., Nowak G.J., Petersen H.I., Rallakis D., Suárez-Ruiz I., Sýkorová I., Životić Dragana (2017)

  • Израда хидрогеолошких објеката за потребе захватања подземних вода из алувијона Саве на локацији Мајур (Шабац)

    Лука Обрадовић (2024)
    За потребе формирања изворишта за водоснабдевање фабрике у селу Мајур (град Шабац) технолошком, техничком, санитарном и водом за потребе противпожарне заштите,спроведена су примењена хидрогеолошка истраживања која су обухватила израду две истражне бушотине ЗКИБ-1 и ЗКИБ-2 ,директном методом бушења, са уградњом пијезометарске конструкције и израду једног истражно-експлоатационог бунара. Бунар је израђен реверсном методом бушења уз примену чисте воде као радног флуида.Пројектовани бунар је дубине 30 метара чији капацитет износи 32,67 l/s. Захвата подземне воде формиране у овкиру алувијаних слојева реке ...
    израда бунара, истражно бушење, хидрогеолошка истраживања, Мајур
    ... HHTepBanuwma 7,0 – 8,0 m u 23,0 – 24,0 m. K “ „ /;”.'/'ffrl/ Cnuka 5.19 - . Haoneo uumepceke koncmpykuuje u 0Oema;b nep(bopauuje (zope), manozicHuka ca uenmpanusepuwa (0o;te ne6o); Hncmanupatbe ma.nooicHuka ca uenmpa.nusepuw u qjuzmepa (0one 0ecno) 49 Ha3wB o6jekra: byHap 3K-1/24 w nvjeaoMerap ...
    ... cpe)iibeMeceuHH BOJIOCTAJ peKe CaBe 3a0e;te)KeH je aprycra 2003. ronmaHe ca H3MepeHux -103 cm. Ha cnunuu 2.10 npakKayaaH je nujarpaM cpejibero/uHIHHe Bpe}IHOCTH BOJIOCTAJA peke CapBe. 300 250 200 E K3 7 150 5 o -i o o 100 S »v Y o T N Y OTo D s” Ta > 7 . T T!A r ro! O 7 s s S S S S ...
    ... ceeep, NE - ceeepoucmok, E - ucmok, SE - jyeoucmok, S}/ - jveosanaoa, !/ - aanao, NM - ceaeposanao, b – 6psuna eempa, U – uecmuna aempa Mep N NE E SE s SW W NW Tonjn. b J|b J |b J | b U, b U|bE J |b J b u 2000 |2,6 89 |2,6 203 )|3,3 221|3,| SI | 2, 46)2,5 90 |3,0 201 |3, 3 142 2001 3, 74 |2,7 188 ...

  • On the distribution modulo 1 of the sum of powers of a Salem number

    Dragan Stankov (2016)
    It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... a model to Asp located at· the centre of the b{ndmg cleft study related enzymes. As all aspartic proteinases between the domains. One of two Asp residues has to pepsin molecule consist of two homologous lobes · be protonated and the other deprotonated, for the composed predominantly of B-sheets separated ...
    ... rm ah ea lt hc ar e. co m by TI B/ UB Ha nn ov er on 10 /2 8/ 14 = P E -a |, Š |-5} 5 d |--| 5 8 S Fo r pe rs on al us e on ly . Aluminium doesnot belong to essential elements, and as a non-regulatory ion can be toxic to many organisms. Even itis a most abundant ...
    ... by TI B/ UB Ha nn ov er on 10 /2 8/ 14 Fo r pe rs on al us e on ly . Keywords: Pepsin, altıainium, kinetics, activation, electrobhoretic mobility s -| |s y- -| : 5 9 = = zi -i Introduction pepsinogen, by removal of 44 amino acids, from its amino terminus, to give ...

  • Stanje i perspektivnost vodosnabdevanja Obrenovca i naselja opštine posle poplava, 2014. godine

    Bojan Hajdin, Dušan Polomčić, Dragoljub Bajić (2017)
    Obrenovac i okolna naselja su tokom 2014. godine zbog poplava u Srbiji pretpeli veliku materijalnu štetu, a pored brojnih privrednih preduzeća ozbiljno je bio ugrožen i sistem vodosnabdevanja. Izvorište „Vić bare“ za vodosnabdevanje grada u selu Zabrežje, na Savi, u potpunosti je potopljeno, a vodovodna mreža, u pojedinim delovima već veoma stara, dodatno je oštećena. Poslednjih nekoliko decenija kao glavni razlozi za probleme u vodosnabdevanju Obrenovca isticane su nedovoljne rezerve podzemnih voda na izvorištu. Novijim istraživanjima utvrđene su rezerve ...
    ... ograni- čenim mogućnostima ove vodonosne sredine, ali su B. HAJDIN i dr. STANJE I PERSPEKTIVNOST VODOSNABDEVANJA OPŠTINE... TEHNIKA – RUDARSTVO, GEOLOGIJA I METALURGIJA 68 (2017) 5 677 detaljnim istraživanjima Rudarsko-geološkog fakulte- ta [1], zatim i Instituta „Jaroslav Černi“ [2] već tada utvrđeni ...
    ... available at: www.dr.rgf.bg.ac.rs B. HAJDIN i dr. STANJE I PERSPEKTIVNOST VODOSNABDEVANJA OPŠTINE... TEHNIKA – RUDARSTVO, GEOLOGIJA I METALURGIJA 68 (2017) 5 675 Stanje i perspektivnost vodosnabdevanja opštine Obrenovac posle poplava 2014. godine BOJAN B. HAJDIN, Univerzitet u Beogradu, Stručni ...
    ... podze- mnih voda, Beograd, 1997. [3] Stevanović Z, Hajdin B. Elaborat o rezervama podzemnih voda izvorišta „Vić bare“ u Zabrežju za vodosnabdevanje Obrenovca. Fond RGF, Departman za hidrogeologiju, Beograd, 2008. [4] Polomčić D, Hajdin B, Stevanović Z, Bajić D, Hajdin K. Groundwater management ...

  • Results of Recent Monitoring Activities on Landslide Umka, Belgrade, Serbia—IPL 181

    Biljana Abolmasov, Uroš Đurić, Jovan Popović, Marko Pejić, Mileva Samardžić Petrović, Nenad Brodić (2021)
    Klizišta, Monitoring, GNSS, Geodetska osmatranja, UAV snimci, PSInSAR
    ... nt vectors obtained from UAV imaging after 2018 and 2019 campaigns 232 B. Abolmasov et al. References Abolmasov B, Milenković S, Jelisavac B, Vujanić V, Pejić M, Pejović M (3–8 June, 2012) Using GNSS sensors in real time monitoring of slow moving landslides-a case study. In: Eberhardt E, Froese ...
    ... 30 m (Abolmasov et al. 2015). 226 B. Abolmasov et al. Recent Monitoring Activities (2014–2019) In the past few years many authors integrated monitoring data from different sources to reduce uncertainities (Mateos et al. 2017, Casagli et al. 2017). In addition to the existing GNSS monitoring system ...
    ... 3rd World Landslide Forum, vol 1, pp 75–80. Springer International Publisher Abolmasov B, Milenković S, Marjanović M, Đurić U, Jelisavac B (2015) A geotechnical model of the Umka landslide with reference to landslides in weathered Neogene marls in Serbia. Landslides 12 (4):689–702 Fig. 8 Results ...

  • Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions

    Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)
    A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... (Fitzner et al. 1995, 1997a, b) is cost-effective and non-destructive procedure that allows a quantitative registration, according to litho- types and to type, intensity and distribution of weathering forms. The mapping method ensures an important contri- bution to comprehensive and reliable damage ...
    ... Butterworth-Heinemann, Oxford, pp 859-862 McCabe S, Smith B J, Warke P A (2007) An holistic approach to the assessment of stone decay: Bonamargy Friary, Northern Ireland. In: Pirikryl R, Smith B J (ed) Building stone decay: from diagnosis to conservation. Geological society, Special publica- tions ...
    ... Fig. Ša, b, their values are in relation to gate”s orientation, too. The values of linear damage indices display insignif- icant differences between 2007 and 2014 for the entire gate as well as north and south facades. Nevertheless, the dif- ference of linear damage indexes from 2007 to 2014 is ...

  • Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine

    Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)
    The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...
    Fuzzy theory, hydraulic excavator, selection, quality of service, asset management

  • 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

  • Tektonske i litostratigrafske karakteristike šireg područja Grivske (Zapadna Srbija)

    Nikola Otašević (2024)
    U ovom radu predstavljene su osnovne geološke karakteristike šireg područja Grivske. U litostratigrafskom pogledu na ovom prostoru prisutne su paleozojske, mezozojske i kenozojske sedimentne, magmatske i metamorfne stene. Tvorevine karbona su predstavljene semimeta-morfisanim tvorevinama.Tvorevine trijaske starosti su predstavljene slojevitim i masivnim krečnjacima, dok su tvorevine jure predstavljeni produktima ofiolitskog melanža. Takođe, prisutne su i tvorevine senona koje su predstavljene masivnim krečnjacima. U neogenoj sukcesiji dominiraju klastiti miocena, dok su u kvartaru zastupljeni različiti tipovi fluvijalnih, deluvijalnih i deluvijalno-proluvijalnih tvorevina. ...
    Arilje, grivska formacija, Drina-Ivanjica, tektonska evolucija

  • Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra

    Aleksandar Milojević (2024)
    Nakon radova otvaranja i početka eksploatacije, rudno telo bakra velikih rezervi zahteva i veliku količinu eksploziva da bi se ostvario zacrtan kapacitet. Samim tim, neophodno je izraditi funkcionalan magacin eksploziva koji će biti pristupačan svim horizontima i koji će moći da ispuni celokupni kapacitet svih horizonata. Obzirom da će se u magacinu skladištiti eksploziv, on mora ispunjavati specijalne uslove kako bi skladištenje bilo bezbedno. Neophodno je isprojektovati magacin tako da ispuni sve zahteve po pitanju količine i načina skladištenja eksploziva, ...
    podzemna eksploatacija, ležište bakra, magacin, eksploziv
    ... SS Z oO E |a| %_| ŠBI m E R— 50655 E Š |Blo8 ŠSŠ oS8BEŠ R ZR o MZ BO o ĐRE|kSM5 E SB| G s | EZ M B| 5 EB | P|GOB| Č O BJ i ž | E o lB P IE Š 0I Š | MI g e 580 |0 s > 5 IO N e E Ve Ls Vv V t Qau Tu Tu N dng n Bum dnu Bem m? mš m km/h | m* | min | m*/h | min h kW l/h l/m 1/h I//m | kom/m 10,29 | ...
    ... OO HON X o iztri na pritisak | . \ . - . iztri prostorije nosivosti nosivosti obruš. opterećenje | ti centra F L h ho P hs [;] opp | - [. KS B Rs sin [ p m? m m 0,7do 1 0,5 do 0,8 m N/m? m m N/m?> N/m? 3 do 5 m o 10,63 3,00 0,500 0,850 0,600 0,980 23529 1,000 | 0,3 | ...
    ... ON RN < i iztri na pritisak izvlače - ; iztri prostorije obrušavanja | nosivosti nosivosti obruš. opterećenje ; masivu ti . centra nja centra F L h ho P hs [;] opp | - [.2.4 KS B Rs sin [ p m? m m 0,7 do 1 0,5 do 0,8 m N/m? m m N/m? N/m? 3 do 5 m o 5,58 2,00 0,333 0,850 0,600 0,654 15686 0,667 ...

  • Анализа квантитативног и квалитативног режима подземних вода: Случај изворишта за водоснабдевање Друговца у Смедереву

    Милан Павличић (2024)
    У раду су приказани резултати истражних радова који су спроведени у периоду од 13.04.2018. до 31.05.2019, у циљу дефинисање режима и категоризације резерви подземних вода на изворишту за водоснабдевање Друговца у Смедереву. Бунарима ИЕБДР-1/93 и ИЕБД-1/2002 су каптирани песковити седименати неогене старости. У току режимских осматрања вршени су тестови црпења, осматрања нивоа подземних вода, режимa падавина као и квалитетa подземних вода. Утврђене су укупне резерве подземних вода у количини од 5,3 l/s. Хемијске анализе воде показују да је хидрохемијски ...
    режимска осматрања, тестови црпења, неогени седименти, хидрохемијски режим, извориште
    ... ranasina 01.04 2018 -3105 2019.rovpne <—=CMarcmamta mHzaNa roniniia raaznia AB TV CT CE IT TE MB AP OK TO BA P HO BE MB AP JA HV AP OD EB PY AP MA PT AT IP PU I MA J I E I I E M B A P < 1018.ronuna > < 1019.romMBa > Cauka 6.9 - Xucmozpaw Meceunux cya naoaduHa 3a nepuoo ...
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  • Hypogene karst associated with igneous intrusions and its influence on the subsequent karst evolution in high mountains (Central Andes, Peru)

    Alexander B. Klimchouk, Saša Milanović, Cristian Bittencourt (2021)
    Carbonate rocks of Cretaceous age are wide spread in the Peruvian Andes. The studied area in the eastern part of the Cordillera Occidental, near a large igneous intrusion and a skarn deposit, exemplifies polygenetic and multi-phase karst development. Hypogene karstification is related to a hydrothermal activity associated with a magmatic event at ca. 11-9.7 Ma responsible for the emplacement of the nearby intrusion and related alteration of the carbonate rocks. It has resulted in deep-rooted, laterally isolated stair-case-rising shaft ...

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • Contribution to the geotechnical classification of municipal waste landfills in Serbia

    Dragoslav Rakić, Irena Basarić, Laslo Čaki, Slobodan Ćorić (2018)
    Management, Monitoring, Policy and Law, Nature and Landscape Conservation, Geochemistry and Petrology, Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental Engineering