Претрага
804 items
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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 polynomialsDragan Stankov. "The number of unimodular roots of some reciprocal polynomials" in Cmptes rendus mathematique (2020). https://doi.org/10.5802/crmath.28 М23
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Determination of wather loss from reservoirs in less permeable karst aquifer- case example of left bank of Lazici dam- western Serbia
Jemcov Igor, Mladenović Ana, Pavlović Radmila, Trivić Branislav, Petrović Dragana, Petrović Rastko (2014)Jemcov Igor, Mladenović Ana, Pavlović Radmila, Trivić Branislav, Petrović Dragana, Petrović Rastko. "Determination of wather loss from reservoirs in less permeable karst aquifer- case example of left bank of Lazici dam- western Serbia" in Proceedings of International conference and field seminar „Karst without boundaries“, 11-15 June 2014, Trebinje, Dubrovnik, Trebinje:Grafokomerc (2014): 307-312 M33
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The First find of otoliths of the Miocene from Eastern Serbia (Dacian Basin)
Katarina Bradić-Milinović, Meri Ganić, Damjan Dimitrov. "The First find of otoliths of the Miocene from Eastern Serbia (Dacian Basin)" in RCMNS INTERIM COLLOQUIUM & INHIGEO CONFERENCE, “100 years of the Paratethys (Laskarev, 1924) – Conceptual History and Modern Challenges”, Српско геолошко друштво (2024) М34
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The number of nonunimodular roots of a reciprocal polynomial
Dragan Stankov (2023)We introduce a sequence Pd of monic reciprocal polynomials with integer coefficients having the central coefficients fixed as well as the peripheral coefficients. We prove that the ratio of the number of nonunimodular roots of Pd to its degree d has a limit L when d tends to infinity. We show that if the coefficients of a polynomial can be arbitrarily large in modulus then L can be arbitrarily close to 0. It seems reasonable to believe that if ...Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "The number of nonunimodular roots of a reciprocal polynomial" in Comptes rendus mathematique, Elsevier France Editions Scientifiques et Medicales (2023). https://doi.org/10.5802/crmath.422 М23
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Preparation, characterization and photocatalytic activity of lanthanum and vanadium co-doped mesoporous TiO2 for azo-dye degradation
Nešić Jelena, Manojlović Dragan D., Anđelković Ivan, Dojčinović Biljana, Vulić Predrag, Krstić Jugoslav, Roglić Goran (2013)Nešić Jelena, Manojlović Dragan D., Anđelković Ivan, Dojčinović Biljana, Vulić Predrag, Krstić Jugoslav, Roglić Goran. "Preparation, characterization and photocatalytic activity of lanthanum and vanadium co-doped mesoporous TiO2 for azo-dye degradation" in Journal of Molecular Catalysis A: Chemical 378, Amsterdam:Elsevier (2013): 67-75. https://doi.org/10.1016/j.molcata.2013.05.018 M22
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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)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. "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" in International Journal of Coal Geology 178, Amsterdam, Netherlands:Elsevier BV (2017): 26-38. https://doi.org/10.1016/j.coal.2017.04.013 M21a
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NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands
Mijatović Aleksandar, Šmit Biljana, Rilak Ana, Petrović Biljana , Čanović Dragan, Bugarčić D. Živadin (2013)Mijatović Aleksandar, Šmit Biljana, Rilak Ana, Petrović Biljana , Čanović Dragan, Bugarčić D. Živadin. "NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands" in Inorganica Chimica Acta 394, Amsterdam, Netherlands : Elsevier BV (2013): 552-557. https://doi.org/10.1016/j.ica.2012.09.016 M22
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Prostorni položaj ofiolita istočne Vardarske zone: geofizičko-geološki model i njegove geodinamičke implikacije
Dragana D. Petrović (2015-12-29)Centralni deo Balkanskog poluostrva je geotektonski veoma složen. Tetis je zatvorentokom gornjeg mezozoika, a ofioliti na zapadu i ofioliti Vardarske zone predstavljajuostatke nekadašnjih okeanskih prostora. Najistočniji deo Vardarske zone razlikuje se odsvih ostalih ofiolita na Balkanskom poluostrvu i karakteriše se najizraženijim suprasubdukcijskimafinitetom. Istočna vardarska zona locirana je u centralom delu Srbije.Na severu se prostire do Apusena u Rumuniji, a na jugu obuhvata cetralni deoMakedonije i Peonias zonu u severnoj Grčkoj. Istočna vardarska zona se nalazi istočnood geotektonske jedinice Kopaonik ...Dragana D. Petrović. "Prostorni položaj ofiolita istočne Vardarske zone: geofizičko-geološki model i njegove geodinamičke implikacije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-12-29)
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Sensitive Determination of Copper on New Modified Glassy Carbon Paste Electrode
Škrivanj Sandra, Stanković M. Dalibor, Khan Muslim, Nikolić S. Aleksandar, Vulić Predrag, Manojlović D. Dragan (2015)Škrivanj Sandra, Stanković M. Dalibor, Khan Muslim, Nikolić S. Aleksandar, Vulić Predrag, Manojlović D. Dragan. "Sensitive Determination of Copper on New Modified Glassy Carbon Paste Electrode" in Analytical & Bioanalytical Electrochemistry 2 no. 7 (2015): 230-241 M51
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First insights into the Mesolithic settlement of Southern Serbia - Excavation of the Pešterija Cave in the Ponišavlje Region
Dušan Mihailović, Ivana Živaljević, Vesna Dimitrijević, Sofija Dragosavac, Danilo Pajović, Anđa Petrović, Katarina Bogićević, Dragana Đurić, Mirela Djurović, Steven Kuhn, Mirjana Roksandić (2024)Ranoholocenski lokaliteti u Srbiji su do sada bili poznati samo iz oblasti Đerdapske klisure. Neki arheolozi tvrde da je očigledan nedostatak mezolitskih lokaliteta posledica neadekvatnog istraživanja u ovoj oblasti, dok drugi pretpostavljaju da ekološki uslovi u centralnom Balkanu tokom ranog holocena možda nisu bili povoljni za život zajednica lovaca-sakupljača. Međutim, suprotno dosadašnjim mišljenjima, novija istraživanja pećina u istočnoj Srbiji otkrila su da su ljudi ipak naseljavali ovu oblast tokom mezolita. Tragovi naseljavanja mezolitskih grupa, koji datiraju sve do 7. ...Dušan Mihailović, Ivana Živaljević, Vesna Dimitrijević, Sofija Dragosavac, Danilo Pajović, Anđa Petrović, Katarina Bogićević, Dragana Đurić, Mirela Djurović, Steven Kuhn, Mirjana Roksandić. "First insights into the Mesolithic settlement of Southern Serbia - Excavation of the Pešterija Cave in the Ponišavlje Region" in Documenta Praehistorica, University of Ljubljana (2024). https://doi.org/10.4312/dp.51.7 М24
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Approximation of the number of roots that do not lie on the unit circle of a self-reciprocal polynomial
Dragan Stankov (2024)We introduce the ratio of the number of roots not equal to 1 in modulus of a reciprocal polynomial Rd(x) to its degree d. For some sequences of reciprocal polynomials we show that the ratio has a limit L when d tends to infinity. Each of these sequences is defined using a two variable polynomial P(x,y) so that Rd(x) = P(x,xn). For P(x,y) we present the theorem for the limit ratio which is analogous to the Boyd-Lawton limit formula ...Dragan Stankov. "Approximation of the number of roots that do not lie on the unit circle of a self-reciprocal polynomial" in The book of abstracts XIV symposium "mathematics and applications” Belgrade, Serbia, December, 6–7, 2024 , Univerzitet u Beogradu, Matematički fakultet (2024) М64
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Long-Term Planning Methodology for Improving Wood Biomass utilization
Vukašinović V., Gordić D., Živković Marija, Končalović D., Živković D.. "Long-Term Planning Methodology for Improving Wood Biomass utilization" in 3rd South East European conference on sustainable development of energy, water and environment systems (2018): 66 M33
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Fe doped TiO2 prepared by microwave-assisted hydrothermal process for removal of As(III) and As(V) from water
Anđelković Ivan B, Stanković Dalibor M, Nešić Jelena, Krstić Jugoslav B, Vulić Predrag, Manojlović Dragan D, Roglić Goran M (2014)Anđelković Ivan B, Stanković Dalibor M, Nešić Jelena, Krstić Jugoslav B, Vulić Predrag, Manojlović Dragan D, Roglić Goran M. "Fe doped TiO2 prepared by microwave-assisted hydrothermal process for removal of As(III) and As(V) from water" in Industrial and Engineering Chemistry Research 53 no. 27, Washington:American Chemical Society (2014): 10841-10848. https://doi.org/10.1021/ie500849r M21
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Fenton-like oxidation of an azo dye using mesoporous Fe/TiO2 catalysts prepared by a microwave-assisted hydrothermal process
Nešic Jelena, Manojlović Dragan D, Jović Milica S, Dojčinović Biljana P, Vulić Predrag, Krstić Jugoslav B, Roglić Goran M (2014)Nešic Jelena, Manojlović Dragan D, Jović Milica S, Dojčinović Biljana P, Vulić Predrag, Krstić Jugoslav B, Roglić Goran M. "Fenton-like oxidation of an azo dye using mesoporous Fe/TiO2 catalysts prepared by a microwave-assisted hydrothermal process" in Journal of the Serbian Chemical Society 79 no. 8, Belgrade:Serbian Chemical Society (2014): 977-991. https://doi.org/10.2298/JSC131001143N M23
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New evidence for the use of cinnabar as a colouring pigment in the Vinca culture
Gajić Kvascev Maja, Marić Stojanović Milica, Smit Z., Kantarelou V., Karydas Andreas G., Šljivar D., Milovanović Dragan, Andrić Velibor (2012)Gajić Kvascev Maja, Marić Stojanović Milica, Smit Z., Kantarelou V., Karydas Andreas G., Šljivar D., Milovanović Dragan, Andrić Velibor. "New evidence for the use of cinnabar as a colouring pigment in the Vinca culture" in Journal of Archaeological Science 39 no. 4, London, England:Academic Press Ltd- Elsevier Science Ltd, 24-28 Oval RD, London NW1 7DX, England (2012): 1025-1033. https://doi.org/10.1016/j.jas.2011.11.023 M22
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Fizičko-geografske karakteristike vulkana Teide na Kanarskim ostrvima
Radovanović D., Srećković -Batoćanin D., Valjarević A., Ivanović R., Veselinović J.. "Fizičko-geografske karakteristike vulkana Teide na Kanarskim ostrvima" in 4. Srpski Kongres geografa, Kopaonik 7-9.oktobar (2015) M64
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Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements
The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović. "Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements" in Advances in Engineering Software, Elsevier BV (2020). https://doi.org/10.1016/j.advengsoft.2020.102824 М21а
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Directions of future geological explorations of mineral resources in Serbia
Jelenković Rade, Simić Vladimir, Kostić Aleksandar, Životić Dragana, Tošović Radule. "Directions of future geological explorations of mineral resources in Serbia" in Reports of the Serbian Geological Society, :Serbian Geological Society (2016): 9-38 M52
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Минералошко-петрографска карактеризација и могуће порекло сировина коришћених за израду абразивних и глачаних камених алатки на енеолитском локалитету Масинске њиве.
Кристина Шарић, Сузана Ерић, Владица Цветковић, Јосип Шарић, Драгана Антоновић. "Минералошко-петрографска карактеризација и могуће порекло сировина коришћених за израду абразивних и глачаних камених алатки на енеолитском локалитету Масинске њиве." in Гласник Српског археолошког друштва 33, Београд:Српско археолошко друштво (2017): 283-307 M51
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Primena backcasting metodologije pri dugoročnom planiranju korišćenja biomase
Vukašinović V., Gordić D., Živković Marija, Živković D., Josijević M., Jurišević N.. "Primena backcasting metodologije pri dugoročnom planiranju korišćenja biomase" in Energija 20 no. 01-Feb (2018): 563-571 M52