Zbornik radova sa Međunarodne konferencije o nastavi fizike i srodnih nauka
(Društvo fizičara Srbije, Beograd)
• 07 Oct 2018
Gulan, Ljiljana • Vučković, Biljana • Kevkić, Tijana • Drljača, Branko
Sistematska merenja koncentracije radona se najčešće izvode na slučajnim uzorcima stambenih objekata. Međutim, škole se mogu pokazati kao pogodniji izbor, jer su uniformno raspoređene po celoj teritoriji područja ili naselja, na način da se njihova prostorna raspodela može dovesti u vezu sa gustinom naseljenosti, tako da manji broj merenja može dati relevantne podatke. U cilju kontorole i zaštite dece i odraslih sprovedena istraživanja izlaganja populacije radonu u školama u većini evropskih zem ...
Zbornik radova sa Međunarodne konferencije o nastavi fizike I srodnih nauka, Subotica 2018
(Društvo fizičara Srbije, Beograd)
• 07 Oct 2018
Vučković, Biljana • Gulan, Ljiljana • Kevkić, Tijana • Živković Radovanović, Jelena
Prirodno pozadinsko zračenje koje se registuje u normalnim uslovima potiče od kosmičkog zračenjai prirodnih radionuklida, a zavisi od geologije tla i nadmorske visine mernog mesta, pa je karakteristično za neki prostor. Ono što definiše jačinu zračenja je vrednost ambijentalnog doznog ekvivalenta gama zračenja. Rezultati predstavljeni u ovom radu jedna su od eksperimentalnih vežbi u okviru predmeta Dozimetrija i zaštita od zračenja na odseku za fiziku Prirodno-matematičkog fakulteta. Istraživanj ...
ICEST 2019, Proceedings of papers
• 01 Jul 2021
Zlatković, Dragan • Denić, Nebojša • Ilić, Miloš • Petrović, Milena
The process of developing e-learning is based on standards in the field of information security (ISO) and learning technologies (IEEE, IMS), and criteria for quality assurance have been taken as input parameters. The overall development was carried out through the PDCA cycle and with upgraded LTSA architecture.
19th International Symposium INFOTEH-JAHORINA, 18-20 March 2020
• 18 Mar 2020
Mihajlov Carević, Miroslava • Petrović, Milena • Nebojša, Denić
In this paper, we deal with the dominating set and the domination number of rhomboidal cactus chains. We determine minimum dominating sets and domination numbers of two special types of rhomboidal cactus chains, meta and ortho-chains. Thereafter, we determined the minimum dominating set for the icosahedral hexagonal network. Keywords: dominating set; rhomboidal cactus chains; icosahedral hexagonal network.
МЕЂУНАРОДНО саветовање Управљање знањем и информатика (6 ; 2020 ;Копаоник)
(Управљање знањем - Зборници)
• 13 Jan 2020
Zlatković, Dragan • Denić, Nebojša • Petrović, Milena • Ilić, Dejan
Ово је концептуални рад на проучавању употребе електронских уџбеника (е-уџбеник)
као алата за е-учење. Истраживачки рад разматра литературу о основним концептима е-
уџбеника. У раду се разматрају и анализирају ранија истраживања и студије о е-уџбенику и
његовој употреби у образовању, посебно у процесу наставе и е-учења. Налази укључују
вишеструке дефиниције е-уџбеника, ограничења и предности које се чине најутицајнијим у
његовој употреби у процесу е-учења и да ли су се перцепције корисн ...
(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)
• 03 Sep 2020
Mihajlov Carević, Miroslava • Petrović, Milena • Denić, Nebojša
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 studies and research results, the quality of mathematics teaching in schools was examined. The results of the research of he authors of this paper showed the lack of a visual-logical approach in solving mathematical problems. Primary and secondary school students are prim ...
International conference on Applied Internet and Information TechnologiesOctober 3-4, 2019, Zrenjanin, Republic of Serbia
• 03 Oct 2019
Zlatković, Dragan • Denić, Nebojša • Petrović, Milena
Implementation of E-Learning is one of the ways of applying modern information technologies to achieve a high quality of higher education. The transition of higher
education institutions towards E-Learning should be an integral part of strategic planning that seeks to change and improve the work of universities. This paper explains the
importance of systematic implementation of E-Learning in higher education institutions. The article analyzes internal strengths and weaknesses, as well as exter ...
XIII Balkan Conference on Operational Research Proceedings: Belgrade, Serbia
(The Mathematical Institute of the Serbian Academy of Sciences and Arts (SANU))
• 01 Apr 2024
Kontrec, Nataša • Panić, Stefan • Petrović, Milena
This paper presents a novel approach for estimation of repair rate in an observed system comprised of two or more components. The presented approach is based on calculation of probability density function of maximal and minimal system’s repair time by observing the repair rates of its components. Based on the obtained information it can be concluded in which time interval the repair or replacement should be completed in order to achieve the desired level of availability. The model can be further ...
(Society of Physical Chemists of Serbia)
• 28 Sep 2018
Sejdinović, Dijana • Laban, Bojana • Marković, Mirjana • Ralević, Uroš • Badnjević, Almir • Omanović Miklićanin, Enisa • Jokić, Anja • Vasić, Vesna
In this work, we present a simple green method for Ag and Au nanoparticles (NPs) synthesis in an aqueous medium. Ag and Au NPs were synthesized by chemical reduction method, using amino acid L-Methionine as reducing as well as a stabilizing agent. The size of Ag and Au NPs was controlled by changing the pH values of the reaction mixture. They were characterized by UV-Vis spectroscopy, FTIR spectroscopy, and measurement of electrophoretic properties. The size of NPs was determined by atomic force ...
(Society of Physical Chemists of Serbia)
• 28 Sep 2018
Momić, Tatjana • Lazarević-Pašti, Tamara • Laban, Bojana • Marković, Mirjana • Vasić, Vesna
Gold nanoparticles and quercetin-conjugated gold nanoparticles complex were synthesized using trisodium citrate as reducing agent. Both kinds of nanoparticles were characterized using spectrophotometry, dynamic light scattering and zeta potential measurements. Comparison of the results confirmed successful synthesis of quercetin-conjugated gold nanoparticles complex.
(Society of Physical Chemists of Serbia)
• 28 Sep 2018
Bondžić, Aleksandra • Vujačić Nikezić, Ana • Kalska, Beata • Klekota, Urszula • Laban, Bojana • Vodnik, Vesna • Vasić, Vesna
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 possibility for their tracking in physiological fluids using NPs. The surface plasmon absorption band of AuNPs at 524 nm decreased in the presence of selected complexes, while the new broad band appeared at ~ 640 nm, which showed the increase in intensity with time upon the addit ...
27th Telecommunications forum TELFOR 2019
(27th Telecommunications forum TELFOR 2019)
• 27 Nov 2019
Marković, Aleksandar • Perić, Zoran • Panić, Stefan
The closed-form expression for Q-function does not exist so it is necessary to develop its approximation in order to overcome the difficulties that might appear in diverse
research areas. In this paper the authors are presenting overview of two improved models for Q-function approximation with wide applicability. The first one is based
on Karagiannidis and Mils model and the second one is based on Borjesson model to obtain the desired improved form of Qfunction approximation.
Physical Chemistry 2018, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
• 01 Apr 2024
Pergal, Marija • Kuč, Dragana • Kodranov, Igor • Pergal, Miodrag • Stanković, Dalibor • Petković, Branka • Manojlović, Dragan
In the present study, the degradation of azamethiphos using chlorine dioxide was studied. The optimization of the azamethiphos degradation in terms of chloriпe dioxide dosage, different time of degradation and at different рН values, was performed in system with deionized water. The degradation was monitored using high performance liquid chromatography (НPLC-DAD) analysis. It was found that complete degradation was achieved with optimal concentration of 5 mg/dm3 chlorine dioxide at concentration ...
Physical Chemistry 2018, 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Belgrade
• 01 Apr 2024
Vukojević, Vesna • Đurđić, Slađana • Jevtić, Sonja • Pergal, Marija • Petković, Branka • Stanković, Dalibor
In this work, for the first time, we proposed electrochemical behavior and development of analytical procedure for quantification of pesticide azamethiphos, using boron doped diamond (BDD) electrode. It was found that azamethiphos electrochemical behavior is irreversible oxidation at potential of around 1.70 V, in 1 M nitric acid. Square wave voltammetric technique was most appropriate for azamethiphos quantification. Under optimized experimental conditions linear working range from 2 to 1ОО μ ...
Proceedings of the CODEMA 2020
(Union od Mathematicians of Macedonia – ARMAGANKA)
• 01 Apr 2024
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 torus
knots under this type of deformation.
The Secend International Conference on Sustainable Enviroment and Technologies, 23-24 September 2022, Belgrade, Serbia
• 01 Apr 2024
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 from Fe2+ and Fe3+ salts by the solid-state method and characterized by transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Ultraviolet-visible spectroscopy (UV-Vis) and Fourier-transform infrared spectroscopy (FTIR). The morphology and average size of Fe ...
INFOTEH-JAHORINA (INFOTEH 2020)
(2020 19th International Symposium INFOTEH-JAHORINA (INFOTEH))
• 16 Apr 2020
Vasić, Nikola • Stefanović, Dušan • Rančić, Dejan • Milić, Dejan • Đošić, Danijel
This paper presents initial results of a research towards statistical description of diversity-combined wireless signals that propagate over different environments. This kind of situation is encountered when receiver has multiple input antennas which are positioned in such a way that the fading environment cannot be considered uniform for all propagating paths of signals. We consider a three-input selection combining (SC) combiner with three different fading statistics on each of them, and deriv ...
UNITECH 2018, International Scientific Conference, 16-17 November, Gabrovo 2018, Bulgaria
(TECHNICAL UNIVERSITY OF GABROVO, 2018 UNIVERSITY PUBLISHING HOUSE “V. APRILOV” – GABROVO, 2018)
• 01 Apr 2024
Vujaković, Jelena • Panić, Stefan • Kontrec, Nataša
In real iterations, several types of mean value theorems for definite integrals are used. In complex domain, we cannot specifically formulate the mean value theorem of a particular complex line integral (L) ∫f(z)dz , since we are unable to give an appropriate geometric interpretation of the integral over the surface below a curve L (from z0 to z1 ). Based on the
mean value theorems for a complex line integral in [Vujakovic J., The mean value theorem of line complex integral and Sturm functio ...
UNITECH 2018, International Scientific Conference, 16-17 November, Gabrovo 2018, Bulgaria
(TECHNICAL UNIVERSITY OF GABROVO, 2018 UNIVERSITY PUBLISHING HOUSE “V. APRILOV” – GABROVO, 2018)
• 01 Apr 2024
Vujaković, Jelena • Kontrec, Nataša • Panić, Stefan
The theory of complex differential equations represents an important mathematical discipline both from the theoretical point of view and from numerous applications. Its development was equally encouraged by mathematicians, physicists and engineers. By using the series-iterations method we have explained how the obtained results could be
applied to the complex linear homogeneous first order and canonical complex linear second order differential equations. We have also formulated some conclusi ...
International Scientific Conference UNITECH 2019, Gabrovo, 15-16 November 2019, Bulgaria
(TECHNICAL UNIVERSITY OF GABROVO, 2019 UNIVERSITY PUBLISHING HOUSE “V. APRILOV” – GABROVO, 2019)
• 01 Apr 2024
Vujaković, Jelena • Kontrec • Panić, Stefan
The problem of location of the zero solution of the second order complex oscillator equation for the given analytic function is unlikely to be completely solved. Therefore, estimates have long been resorted to. The easiest case is if the zeros are aligned at the same direction, which is rare. Since there are no other zeros between the two directions, we will assume that there are many zeros on practically every direction in the sector
International Scientific Conference UNITECH 2019, Gabrovo, 15-16 November 2019, Bulgaria
(TECHNICAL UNIVERSITY OF GABROVO, 2019 UNIVERSITY PUBLISHING HOUSE “V. APRILOV” – GABROVO, 2019)
• 01 Apr 2024
Vujaković, Jelena • Jovanović, Tanja • Kontrec, Nataša
By solving the frequency function equation only a small number of complex equations of the second order oscillations can be solved. The simplest way is to observe canonical complex differential equations with constant coefficient. In this paper we give an overview of eight cases of complex differential equations in which the coefficient is a polynomial or a variable coefficient
Mathematics, its Applications and Mathematical Education (MAME’20), Proceedings of the VII International Conference, September 7 – 12, 2020, Ulan-Ude, Baikal
(Ulan-Ude , Publishing Department of East Siberia State University of Technology and Management)
• 01 Apr 2024
Taseiko, Olga • Milošević, Hranislav • Vujaković, Jelena • Kontrec, Nataša • Panić, Stefan
В работе рассмотрены водные экосистемы как элементы единой социально природно-техногенной системы, предлагаемой для решения задач управления развитием промышленных территорий. Для оценки территориальных рисков водных экосистем отдельных регионов СФО предложен метод, сочетающий иерархический кластерный анализ и вероятностные оценки реализации негативных воздействий.
Proceeding of the CODEMA 2020 - Зборник на трудови од CODEMA
(Union od Mathematicians of Macedonia – ARMAGANKA)
• 01 Apr 2024
Vujaković, Jelena • Paunović, Ljiljana • Taseiko, Olga
The opinion is that the most important result in the metrical theory of
fixed points is the famous Banach contraction principle from 1922. It has been
generalized and extended in several directions. One of the most interesting
extensions was provided by Wardowski in 2012. He described a new
contraction, so–called F-contraction and proved that every F-contraction has a
unique fixed point, where F:(0,+infinity)->(0,+infinity) satisfies conditions (F1 ), (F2 ) and (F3). Several authors general ...
ICPRSE – International Conference on Teaching Physics and Related Sciences
• 07 Oct 2018
Kevkić, Tijana • Vučković, Biljana • Gulan, Ljiljana • Drljača, Branko
This paper oresents the results if measurements of ultraviolet radiation in Kuršumlija - Blace on July 15th 2018, and in Kruševac - Trstenik on July 16th 2018.
ICPRSE – International Conference on Teaching Physics and Related Sciences
• 07 Oct 2018
Gulan, Ljiljana • Vučković, Biljana • Kevkić, Tijana • Drljača, Branko
Sistemska merenja koncentracije radona senajčešće izvode na slučajnim uzorcima stambenih objekata.
ICPRSE – International Conference on Teaching Physics and Related Sciences
• 07 Oct 2018
Drljača, Branko • Đokić, Boban • Šiljić, Ivan • Kevkić, Tijana • Gulan, Ljiljana
Veliki broj osnovnih i srednjih škola u Republici Srbiji nije adekvatno opremeljen za izvođenje nastave fizike. Tu se pre svega misli na nedovoljnu opremljenost kabineta za nastavu fizike, kojima često nedostaje oprema za izvođenje nastave fizike.
ICPRSE – International Conference on Teaching Physics and Related Sciences
• 19 Dec 2019
Drljača, Branko • Đokić, Boban • Spasić, Dušica
Na osnovu pregleda najsavremeniji nastavni proces fizike u osnovnim školama svake godine postaje izazovniji. Glavno pitanje je kako pronaći prikladna sredstva za približavanje fizike učenicima. Na fizici primarnog nivoa je često teško objasniti fizičke procese zbog relativno visokog nivoa zamišljenosti. Škole smeštene u gradovima uglavnom su opremljene nastavnim alatima koji se mogu koristiti u nastavi fizike. S druge strane, škole u seoskim oblastima Srbije slabo su ili nisu opremljene nastavni ...
Зборник на трудови Трета меѓународна конференција за образованието по математика, физика и сродни науки
(Природно‐математички факултет, Скопје)
• 08 May 2022
Đokić, Boban • Milentijević, Miljana • Drljača, Branko
Развој савремених технологија утиче на промену живота људи све већом брзином.
Напредак технологије омогућава примену великог броја мултимедијалних уређаја помоћу
којих се ученицима могу приближити и поједноставити појаве које је тешко дочарати помоћу
стандардних метода предавања табла, креда и презентација. У овом раду је кроз неколико
примера из физике, у оквиру једне наставне теме, предложено могуће решење за извођење
наставе у школама које немају адекватно опремљене кабинете за наста ...
International Scientific and Technical Conference “Energy, Infocommunication Technologies and Higher Education”
(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»)
• 01 Jan 2023
Drljača, Branko • Savović, Svetislav • Kovačević, Milan S. • Simović, Ana • Kuzmanović, Ljubica • Djordjevich, Alexandar • Yussupova, Gulbakhar
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 characteristics of multimode
optical fibers are to be modeled. Transmission properties of multimode optical fibers depend
strongly upon modal dispersion, mode-dependent attenuation and the rate of mode coupling.
Throughout years different simulation models have been develo ...
Proceedings of the 22nd International Workshop on Differential Geometry of Submanifolds in Symmetric Spaces & Related Problems
(Kyung Hee University , RIRCM, OCAMI & BK21PLUS)
• 31 Jul 2019
Velimirović, Ljubica • Najdanović, Marija • Rančić, Svetozar
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 torsion and total normalcy
under infinitesimal bending of knots is considered. Our visualization tool devoted
to visual representation of infinitesimal bending of knots is used to present the
deformation.
Proceedings XXIII YuCorr, International Conference Meeting Point Of The Science And Practice In The Fields Of Corrosion, Materials And Environmental Protection. May 16-19, 2022, Divčibare, Serbia. pp.229-234.
• 01 Apr 2024
Mitrovic, Marija • Lempic, Aleksandra • Gulan, Ljiljana
This paper presents the results of radon concentration in ground floor dwellings in the vicinity of the "Trepča" mine. Earlier studies on radon in the area of Kosovska Mitrovica have shown that there are dwellings with high values of this radioactive gas, which can be related to technological activities that can change the concentrations of natural radioactive materials in the environment. According to the World Health Organization, radon is the second leading cause of lung cancer after smoking. ...
Proceedings XXIII YuCorr, International Conference Meeting Point Of The Science And Practice In The Fields Of Corrosion, Materials And Environmental Protection. May 16-19, 2022, Divčibare, Serbia.pp.223-228
• 01 Apr 2024
Gulan, Ljiljana • Jovanović, Stanimirka • Mitrović, Marija • Stajić, Jelena M.
In this paper, the specific activities of radionuclides in ash and ambient dose equivalent rate of gamma radiation in the air in the vicinity of the thermal power plant (TPP) "Kosovo B", Obilić were measured. Five samples for determination the activity of radionuclides in the ash by gamma spectrometric method were taken from the ash dump of the TPP "Kosovo B". The specific activities of the radionuclide 226Ra in the ash are in the range of 9.5 ± 0.6 Bq/kg - 22.4 ± 0.8 Bq/kg. The specific activit ...
Proceedings of The first international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 24-25 September, 2021.
• 01 Apr 2024
Gulan, Ljiljana • Spasić, Dušica • Drobac, Boris • Bačević, Nikola
This study deals with continuous radon monitoring conducted to estimate the relationship between indoor radon measurements and potential occurrences of earthquake in the Balkan region. Radon monitoring was performed with the detector Airthings Corentium Home placed in the basement office of faculty building in Kosovska Mitrovica (N 42.897°, E 20.867°) in winter period of the 2020/21 (four months in continuity). According to the European Seismic Hazard Map this region is classified as moderate ha ...
1th International Conference „Conference on advances in science and technology“ COAST 2022
(Faculty of Management Herceg Novi)
• 26 May 2022
Ristić, Mirjana • Samaržija-Jovanović, Suzana • Jovanović, Vojislav • Petković, Branka • Kostić, Marija • Jovanović, Tijana • Marinović-Cincović, Milena
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 kiseline. Nakon aktiviranja MMT-a izvršena je in situ sinteza UF kompozita pod istim uslovima. Sintetisano je ukupno tri UF kompozita i to: referentni UF kompozit koji sadrži nemodifikovan MMT (UF/K10), UF kompozit koji sadrži termički aktiviran MMT (UF/K10) i UF kompozit koji ...
The First International conference on Sustainable Environment and Technologies „Creating sustainable commUNiTy“
(University "Union Nikola Tesla", Belgrad, Serbia)
• 24 Sep 2021
Petković, Branka • Kostić, Marija • Samaržija-Jovanović, Suzana • Laban, Bojana • Veljović, Djordje • Stanković, Dalibor
In this work, we present domestic high performance electrode material
prepared by thermolysis of in situ synthesized urea-formaldehyde (UF)
resins modified with Fe(III) nitrate. For comparison, material produced by
thermolysis of physical mixture of synthesized UF resins and Fe(lll) salt was
also prepared, and produced materials were electrochemically characterized by
cyclic voltammetry. The obtained results have shown that in situ synthesized
Fe modified UF material (SynFe/UF-TP) prepared ...
The First International Conference on Sustainable Environment and Technologies „Creating sustainable commUNiTy“
• 24 Sep 2021
Samaržija-Jovanović, Suzana • Jovanović, Vojislav • Petković, Branka • Kostić, Marija • Jovanović, Tijana • Marković, Gordana • Marinović-Cincović, Milena
In this work, the hydrolytic stability of composites based on the urea-formaldehyde resin (UF) and montmorillonite-MMT (K1 0 and KSF) as a formaldehyde (FA) scavenger was investigated. K10 and KSF were activated by sodium chloride (NaCl) for the purpose of modified Na-MMT. The degree of activation was determined using specific surface measurement by Sir's method. Evaluation of MMT activation was performed by determining free and liberated FA after acid hydrolysis of synthesized crosslinked UF/MM ...
27th International Conference Ecological Truth & Environmental Research
(University of Belgrade, Technical Faculty in Bor)
• 18 Jun 2019
Budinski-Simendić, Jaroslava • Kojić, Dejan • Marković, Gordana • Jovanović, Slaviša • Erceg, Tamara • Vukić, Nevena • Tanasić, Ljiljana • Samaržija-Jovanović, Suzana
Elastomeric materials have viscoelastic properties and can be designed for numerous applications, tires production, vibration isolation and damping. These properties can be tailored for a wide temperature range and in ozone-rich atmospheres. Processing capacity of a rubber compound can be predicted by their vulcanization properties. In goals of raising environmental demands rubber manufacturers are now focusing on the uses of recycled product. Re-use, recycle, pyrolysis and recovery are the comm ...
XVlIl Scientific-Expert Conference on Railways- RAILCON
(Faculty of Mechanical Engineering Nis)
• 11 Oct 2018
Marković, Gordana • Jovanović, Vojislav • Marinović-Cincović, Milena • Samaržija-Jovanović, Suzana
Wood flour composites can be optimized to obtain new materials for a part of the railroad infrastructure. Curing, mechanical and morphological characteristics of carbon blackand silica-filled natural ntbber (NR)/chlorosulphonated (CSM)/wood flour rubber blends were studied. Results indicate that the minimum torque and max:imum torque increase with increasing filler loading in the compounds, whereas scorch time shows a decreasing trend. The cure time of carbon black--filled NRICSM/wood .flour rub ...
XII Conference of Chemists, Technologists and Environmentalists of Republic of Srpska
(University in Banjaluka, Faculty of Technology)
• 02 Nov 2018
Jovanović, Slaviša • Jovanović, Vojislav • Marković, Gordana • Marinović-Cincović, Milena • Vukić, Nevena • Samaržija-Jovanović, Suzana • Budinski-Simendić, Jaroslava
The effects of pyrogeneous silica on the mechanical properties of elastomeric materials based on natural rubber (NR), polybutadiene rubber (PB) and styrene-butadiene rubber (SBR) are reported. For sample preparations the content of network precursor was constant (25:25:50), but the content of filler was varied (0, 40, 60, 80, 100 phr). Curing behavior was assessed using oscillating disc rheometer. Results indicated that the minimum torque and maximum torque increase with increasing filler loadin ...
Proceedings of the CODEMA 2020
(Union of Mathematicians of Macedonia - ARMAGANKA)
• 31 Oct 2020
Kontrec, Nataša • Panić, Biljana • Tošić, Marina • Vujošević, Mirko
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 reliability of supply system coverage. The problem is defined as a stochastic problem of multi-center location on a graph. As a solution, two new algorithms have been proposed. The first is modified Dijkstra’s algorithm for determination of the most reliable paths between nodes i ...
PROCEEDINGS OF 12th INTERNATIONAL CONFERENCE SCIENCE AND HIGHER EDUCATION IN FUNCTION OF SUSTAINABLE DEVELOPMENT, Užice, Serbia
(Western Serbia Academy of Applied Studies, Užice (Serbia))
• 08 Oct 2021
Maksimović, Miroslav • Kontrec, Nataša • Panić, Stefan
With the development of information technologies and educational software, there was a need for research and examination of how and in what way to use them in teaching, without losing the quality of existing traditional methods. One of the goals in this process of finding the most suitable model for the use of educational software in teaching is to motivate students to use them independently. For that reason, this paper explores the possibilities and ways of introducing GeoGebra mathematical sof ...
