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Приказ резултата 128-147 од 269

    • Infrared wavelength dependence of leaky mode losses and steady state distribution in W-type glass optical fibers 

      Djordjevich, Alexandar; Simović, Ana; Savović, Svetislav; Drljača, Branko (Elsevier, 2018-03-13)
      Infrared wavelength dependence of leaky mode losses and steady state distribution (SSD) in W-type glass optical fibers (doubly clad fibers with three layers) is investigated in this paper for parametrically varied ...

    • Initial improvement of the hybrid accelerated gradient descent process 

      Panić, Stefan; Petrović, Milena; Mihajlov Carević, Miroslava (Cambridge University Press, 2018-08-01)
      We improve the convergence properties of the iterative scheme for solving unconstrained optimisation problems introduced in Petrovic et al. [‘Hybridization of accelerated gradient descent method’, Numer. Algorithms (2017), ...

    • Interaction between gold nanoparticles and selected antitumor gold complexes 

      Bondžić, Aleksandra; Vujačić Nikezić, Ana; Kalska, Beata; Klekota, Urszula; Laban, Bojana; Vodnik, Vesna; Vasić, Vesna (Society of Physical Chemists of Serbia, 2018-09-28)
      The paper presents the results of study of interaction between citrate capped gold nanoparticles (AuNPs) and some antitumor gold complexes with pyridine ligands (AubipyC, AubipyOH and AupyOAc), in order to elucidate the ...

    • Investigation of bandwidth in multimode graded-index plastic optical fibers 

      Simović, Ana; Drljača, Branko; Savović, Svetislav; Djordjevich, Alexandar; Min, Rui (Optica Publishing Group, 2021-09-13)
      A new method is proposed for investigating the bandwidth in multimode graded-index plastic optical fibers (GI POFs). By numerically solving the time-dependent power flow equation, bandwidth is reported for a varied launch ...

    • Iron Oxide Nanoparticles: Synthesis, Characterization and Application 

      Laban, Bojana; Milenković, Mila; Petković, Branka
      In this work, we present a review of the simple synthesis of iron(III)-oxide nanoparticles (Fe2O3 NPs), their characterization and potential application as nanosorbents and voltammetric sensors. Fe2O3 NPs were obtained ...

    • Irradiation resistance of elastomeric composites based on NR/CSM blend and waste rubber powder 

      Marković, Gordana; Marinović-Cincović, Milena; Jovanović, Vojislav; Samaržija-Jovanović, Suzana; Teofilović, Vesna; Marković, Marija; Pavličević, Jelena; Budinski-Simendić, Jaroslava (RAD Centre, Niš, Serbia, 2021-06-14)
      Effect of waste rubber particles (WTR) size on elastomers based on natural rubber and chlorosulfonated polyethylene rubber (NR/CSM= 50:50) was studied. Two types of WTR with different particle size (150–250 μm and 450–600μm) ...

    • Jačina ambijentalnog doznog eкvivalenta i кorelacija sa meteorološкim parametrima u gradu Valjevu i oкolini 

      Gulan, Ljiljana; Leković, Milovan; Spasić, Dušica; Vučković, Biljana
      Ради процене стања радиоактивности у животној средини, спроведена су мерења јачине амбијенталног дозног еквивалента у ваздуху на територији града Ваљева и околине. Истраживање је спроведено Гајгер-Милеровим бројачем ...

    • Knot Bending 

      Najdanović, Marija; Velimirović, Ljubica; Rančić, Svetozar
      In this paper we point out the geometric aspect of knots. By the term knot we mean a closed self-avoiding curve in a 3-dimensional Euclidean space. We consider infinitesimal bending of knots and examine the behavior of ...

    • Knot Energy 

      Velimirović, Ljubica; Najdanović, Marija; Rančić, Svetozar (Kyung Hee University , RIRCM, OCAMI & BK21PLUS, 2019-07-31)
      We discuss infinitesimal bending of curves and knots in R3. A brief overview of the results on the infinitesimal bending of curves is outlined. Change of the Willmore energy, as well as of the total curvature, total ...

    • KORELACIJA IZMEĐU NAČINA AKTIVIRANJA MONTMORILONITA K10 I SADRŽAJA FORMALDEHIDA U UREA-FORMALDEHIDNIM KOMPOZITIMA 

      Ristić, Mirjana; Samaržija-Jovanović, Suzana; Jovanović, Vojislav; Petković, Branka; Kostić, Marija; Jovanović, Tijana; Marinović-Cincović, Milena (Faculty of Management Herceg Novi, 2022-05-26)
      U ovom radu je izvršeno poređenje načina aktiviranja montmorilonita (MMT) K10 sa sadržajem formaldehida (FA) u urea-formaldehidnim (UF) kompozitima. Uzorci MMT-a K10 su aktivirani na dva načina: termički i pomoću sumporne ...

    • KVALITATIVNA ANALIZA EFEKATA ELEKTRONSKOG UČENJA NA UNUTRAŠNJU MOTIVACIJU STUDENATA 

      Zlatković, Dragan; Denić, Nebojša; Petrović, Milena; Ilić, Miloš
      U nastavi studenata na visokoškolskim ustanovama i studijskim programima elektronsko učenje ima značajnu ulogu. Cilj ovog istraživanja koje je sprovedeno na Alfa BK Univerzitetu u Beogradu je istražiti odnos između ...

    • Mathematical Approach for System Repair Rate Analysis Used in Maintenance Decision Making 

      Kontrec, Nataša; Panić, Stefan; Panić, Biljana; Marković, Aleksandar; Stošović, Dejan (MDPI, 2021-05-20)
      Reliability, the number of spare parts and repair time have a great impact on system availability. In this paper, we observed a repairable system comprised of several components. The aim was to determine the repair rate ...

    • Mathematical Modeling of Integral Characteristics of Repair Process under Maintenance Contracts 

      Kontrec, Nataša; Vujaković, Jelena; Tošić, Marina; Panić, Stefan; Panić, Biljana (MDPI, 2021-12-08)
      The repair rate is a very important parameter for system maintainability and can be defined as a frequency of successfully performed repair actions on a failed component per unit of time. This paper analyzes the integral ...

    • MAXIMUM RELIABILITY K-CENTER LOCATION PROBLEM 

      Kontrec, Nataša; Panić, Biljana; Tošić, Marina; Vujošević, Mirko (Union of Mathematicians of Macedonia - ARMAGANKA, 2020-10-31)
      This paper presents an approach for solving the maximum reliability k-center location problem. We are modifying the well-known p-center problem in order to determine the location of the observed objects and maximize the ...

    • Method for investigation of mode coupling in multimode step-index silica photonic crystal fibers 

      Savović, Svetislav; Kovačević, Milan; Simović, Ana; Kuzmanović, Ljubica; Drljača, Branko; Djordjevich, Alexandar (Elsevier, 2021-07-30)
      We propose a new method for investigation the state of mode coupling in a multimode step-index silica photonic crystal fiber (SI SPCF) with a solid-core by solving the time-independent power flow equation. For various ...

    • A mini review of electroanalitical methods for pesticides quantification 

      Jevtić, Sonja; Stanković, Dalibor; Jokić, Anja; Petković, Branka
      This review paper shows the progress made in the last five years in electrochemical methods applied for the purpose of detection and quantification of pesticides - nowadays the most serious pollutants of the environment. ...

    • Modeling electrostatic potential in FDSOI MOSFETS: An approach based on homotopy perturbations 

      Kevkić, Tijana S.; Nikolić, Vojkan R.; Stojanović, Vladica S.; Milosavljević, Dragana D.; Jovanović, Slavica J. (De Gruyter, 2022-01-26)
      Modeling of the electrostatic potential for fully depleted (FD) silicon-on-insulator (SOI) metal-oxide-semiconductor field effect transistor (MOSFET) is presented in this article. The modeling is based on the analytical ...

    • Modeling of power flow in multimode W-type photonic crystal fibers 

      Drljača, Branko; Savović, Svetislav; Kovačević, Milan S.; Simović, Ana; Kuzmanović, Ljubica; Djordjevich, Alexandar; Yussupova, Gulbakhar (МИНИСТЕРСТВО НАУКИ И ВЫСШЕГО ОБРАЗОВАНИЯ РОССИЙСКОЙ ФЕДЕРАЦИИ Некоммерческое акционерное общество «Алматинский университет энергетики и связи имени Гумарбека Даукеева» Федеральное государственное бюджетное образовательное учреждение высшего образования «Казанский государственный энергетический университет», 2023-01-01)
      In this paper recent advances in application of power flow equation to Wtype photonic crystal fibers (PCF) is presented. As known for many years power flow equation has been proven to be best solution when transmission ...

    • MODERN TEACHING TECHNOLOGIES AND DEVELOPING CONSTRUCTIVE THINKING 

      Mihajlov Carević, Miroslava; Petrović, Milena; Denić, Nebojša (4th International Scientific Conference – EMAN 2020 – Economics and Management: How to Cope With Disrupted Times, Online/Virtual, September 3, 2020, SELECTED PAPERS published by: Association of Economists and Managers of the Balkans, Belgrade, Serbia, 2020-09-03)
      Numerous researches in the previous period have shown the effectiveness of mathematical learning with the use of information and communication technologies (ICT) and mathematical software packages. Also, through theoretical ...

    • Morfološka i elektrohemijska karakterizacija nanočestica srebra i gvožđe-oksida namenjenih za elektroanalizu 

      Pantović, Tijana; Jovanović, Filip; Petković, Branka; Laban, Bojana
      Nanočestice metala i oksida metala (NPs) privlače pažnju mnogih istraživača zbog svojih jedinstvenih optičkih i električnih svojstva. Ove nanočestice nalaze primenu u biologiji, medicini, kao i u elektronici, za izradu ...