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Упит dcterms_creator_txt:Jugoslav B. Krstić

850 items

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... 25/j=2, 1/j=3, 0.25/j=4, 0/j=5); (7) - good = (0/j=1, 0/j=2, 0.25/j=3, 1/j=4, 0.25/j=5); - excellent = (0/j=1, 0/j=2, 0/j=3, 0.25/j=4, 1/j=5); B. Questionnaire, statistical processing Employees operating with the bulldozers or connected to their maintenance and logistic are asked to field in ...
    ... grades (given as linguistic variables) [4]. TABLE I. QUESTIONNAIRE FOR ASSESSMENT OF AVAILABILITY INDICATORS A n a ly st N o . A v a il a b il it y in d ic a to r Questionnaire: Bulldozer Liebherr – Drmno Open Pit Mine Grade: Excellent Good Average Adequate Poor The degree ...
    ... of 33%. The lowest level of availability has the Drs-D machine. The availability is evaluated as “poor” and “adequate” in extent of 30%. Figure 4.b shows the mean value of availability for all three types of machines. It is noted that the Catерillar is generally rated with "excellent" and "good" ...

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... 130) (surface mine truck) (4) (919;733;100) Ore reserve Building Orebody A 1,320,422 t Decline (equal for all sections) 2,200 USD/m Orebody B 223,060 t Surface section of transportation 600 USD/m Orebody C 560,811 t Orebody D 540,155 t Slope of decline and surface transport section ...
    ... 1474; 653  919; 733  1300; 1900  0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 250 500 750 1000 1250 1500 1750 Ore body A Ore body B Ore body C Ore body D MPF Optimisation of underground mine decline ... ...
    ... 878.38 4.5 down SBP-UMCP 519 1,500 260 1,648 984 177 1,244.10 6.6 down UMCP-Ore body A 1,648 984 177 1,160 1,229 200 546.53 4.2 up UMCP-Ore body B 1,648 984 177 1,556 1,072 160 128.44 13.3 down UMCP-Ore body C 1,648 984 177 1,474 653 130 376.89 12.5 down UMCP-Ore body D 1,648 984 177 919 733 ...

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

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

  • Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia M. Milošević1, M. Logar1 & B. Đorđević2 1 Faculty of Mining and Geology, University of Belgrade, Đušina 7, Belgrade, Serbia 2National Museum in Belgrade, Trg Republike 1a, ...
    ... al study of clays from Dobrodo, Serbia, for use in ceramics, Clay Minerals, 1-9. doi:10.1180/clm.2019.49 [2] Milošević M., Logar M. & Djordjević B. (2020) Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery. Clay Minerals, 55, 142–149 ...

  • Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava

    Boban S. Pavlović (2022)
    Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...
    energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošača

  • 2D geophysical models of Demir Kapija ophiolite complex

    Đurić Dragana, Cvetkov Vesna, Vasiljević Ivana, Mihajlović Spomenko, Cvetković Vladica (2016)

  • Synchronization of the minimal models of bursting neurons coupled by delayed chemical or electrical synapses

    Vasović Nebojša, Burić Nikola, Todorović Kristina, Grozdanović Ines (2012)

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... inter- section of a set of keywords annotated by a human (A) and a set of keywords annotated using algorithm (B) divided by the number of keywords annotated using the algorithm: P = A ∩ B B . (1) The recall is calculated as the number of keywords in the intersection of a set of keywords annotated by ...
    ... I., Lazić, B., Trtovac, A.: Rule-based auto- matic multi-word term extraction and lemmatization. In: Proceedings of the 10th International Conference on Language Resources and Evaluation, LREC 2016, Por- torož, Slovenia (2016). ISBN 978-2-9517408-9-1 15. Stanković, R., Krstev, C., Lazić, B., Vorkapić ...
    ... s. - The Repository is available at: www.dr.rgf.bg.ac.rs Keyword Extraction from Parallel Abstracts of Scientific Publications Slobodan Beliga1(B), Olivera Kitanović2, Ranka Stanković2, and Sanda Martinčić-Ipšić1 1 Department of Informatics, University of Rijeka, Radmile Matejčić 2, 51 000 Rijeka ...

  • A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...
    Proizvodnja električne energije, Obnovljivi izvori energije, Višekriterijumsko odlučivanje, Srbija
    ... available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Please cite this article as: B. Pavlović, D. Ivezić andM. Živković, Amulti-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case ...
    ... Accepted 4 February 2021 Available online xxxx Keywords: Electricity generation Renewable energy sources Multi-criteria decision analysis Serbia a b s t r a c t When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective ...
    ... could contribute to accomplishing renewable energy targets (SOR, 2020) since Serbia ∗ Corresponding author. E-mail address: boban.pavlovic@rgf.bg.ac.rs (B. Pavlović). is largely dependent on coal. Around 2/3 of domestic electricity generation originates from lignite-fired thermal power plants. The challenges ...

  • Quality of water in storage reservoirs related to the catchments lithology

    Nikić Zoran, Ristić Ratko, Srećković Batoćanin Danica, Ristović Ivica (2011)

  • Paleoecological Character of Asian clams in estimates of the Anthropogenous effect on recent ecosystems

    Radulović Barbara, Nenadić Draženko, Knežević Slobodan, Paunović Momir, Bogićević Katarina (2016)

  • Condition of the agricultural land use in the Danube riverside area with the aspect of their protection from high groundwater levels

    Pajić Predrag, Čalenić Aleksandar, Polomčić Dušan, Bajić Dragoljub (2018)

  • Classification of some significant occurences and mineral, thermal, and thermomineral water deposits of Bosnia and Herzegovina according to V.V. Ivanov classification

    Krunić Olivera, Jovanović Tomislav, Sorajić Stanko, Dokmanović Petar (2011)

  • Fines quality assessment in all-in aggregates for pavement layers related to different standard procedures

    Đokić Olivera, Nikolić Ivanović Mirjana, Tošović Simo, Stefanović Suzana, Milić Bratislav, Rosić Aleksandra ()

  • 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

  • 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
    ... from 4000 to 660 cm ! (a) and selected area from 3600 to 3000 cm ! (b). J.R. Mitrović et al. Trehalose Mannitol Tr an sm it ta nc e (% ) T – TT T T TT T —T—T T_— —T 4000 3500 3000 2500 2000 1500 1000 Wavenumber (cm') b) o — 'European Journal of Pharmaceutical Sciences 189 (2023) 106557 ...
    ... anhydrous D-mannitol. J. Therm. Anal. Calorim. 95 (3), 871–876. https://doi.org/10.1007/510973-008-9384-5, Divović Matović, B., Knutson, D., Mitrović, J., Stevanović, V., Stanojević, B., Savić, S., 'Cook, J.M., Savić, M.M., 2022. Behavioural interaction of pyrazoloquinolinone positive allosteric modulators ...
    ... none ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study Jelena R. Mitrović*, Maja Bjelošević Žiberna b, Aleksandar Vukadinović", Daniel E. Knutson d, Dishary Sharmin d, Aleksandar Kremenović *, Pegi Ahlin Grabnar , Odon Planinšek , Dominique Lunter' ...

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... Surface S confined by continuous curve y = f (x), x-axis, and vertical lines x = a and x = b, if f (x) ě 0 for a ď x ď b (Figure 1), as the definite integral of the function f (x), obtains the following: S “ b ż a f pxq dx (17) Energies 2016, 9, 617 5 of 15                                   ...
    ... spaced, namely if: Ri`1 ´ Ri “ hi pi “ 1, 2, . . . , N ´ 1q (21) Energies 2016, 9, 617 5 of 15 a b X Figure 1. Surface S confined by continuous curve y = f(x), x-axis, and vertical lines x = a and x = b. When carrying out blasting operations, we register (measure) at suitable measuring points the values ...
    ... c 3 ¨ Q 4 ¨ π (4) Energies 2016, 9, 617 3 of 15 By replacing the value r0 from the Equation (4) into Equation (3), we obtain: v “ Kv ¨ ˝ 3 b 3¨Q 4¨π r ˛ ‚ n “ Kv ¨ ˜ 3 c 3 4 ¨ π ¸n ¨ ˆ 3 ? Q r ˙n “ Kv ¨ K1 ¨ ˆ r 3 ? Q ˙´n “ K ¨ ˆ r 3 ? Q ˙´n “ K ¨ R´n (5) where as: ˜ ...