Претрага
935 items
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The Reciprocal Algebraic Integers Having Small House
Dragan Stankov (2021)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 Reciprocal Algebraic Integers Having Small House" in Experimental Mathematics (2021). https://doi.org/ 10.1080/10586458.2021.1982425
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A necessary and sufficient condition for an algebraic integer to be a Salem number
Dragan Stankov (2019)We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.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. "A necessary and sufficient condition for an algebraic integer to be a Salem number" in Journal de theorie des nombres de Bordeaux (2019). https://doi.org/10.5802/jtnb.1076
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Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове
Јелка Крушић (2023)Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки моделЈелка Крушић. Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове, Београд : Универзитет у Београду, Рударско - геолошки факултет, 2023
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Nitrati u podzemnim vodama Srbije
Maja Todorović, Marina Ćuk (2012)Maja Todorović, Marina Ćuk. "Nitrati u podzemnim vodama Srbije" in XIV Srpski simpozijum o hidrogeologiji, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2012)
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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
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Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
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Hydrogeothermal potentials of Rogozna mountain and possibility of their valorization
D. R. Ivanović, Dj. A Valjarević, R. D. Srećković-Batoćanin, N. M. Martić-Bursać, D. Ž. Vukoičić, R. M. Ivanović (2020)D. R. Ivanović, Dj. A Valjarević, R. D. Srećković-Batoćanin, N. M. Martić-Bursać, D. Ž. Vukoičić, R. M. Ivanović. "Hydrogeothermal potentials of Rogozna mountain and possibility of their valorization" in Open Geosciences, Walter de Gruyter GmbH (2020). https://doi.org/10.1515/geo-2019-0083
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A Fuzzy Expert Model for Availability Evaluation
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 ...... are: R(D-Lib.) = 0.06/exc,0.62/good,0.32/avr; M(D-Lib.) = 0.56/good,0.44/avr; S(D-Lib.) = 0.4/good,0.3/aver,0.3/adeq; R(D-Drs.) = 0.34/good,0.56/aver,0.1/adeq; M(D-Drs.) = 0.12/good,0.68/aver,0.2/adeq; S(D-Drs.) = 0.56/aver,0.44/adeq; R(D-Cat.) = 0.52/exc,0.4/good,0.08/avr; M(D-Cat.) = ...
... of A of machine Liebherr-D in form: μA(Lib-D) = (0, 0.11, 0.475, 0.475, 0.14) E. Final Exam and Identification Best-fit method [1] and proposed A fuzzy set give the final availability assessment for the machine Liebherr-D: ⸹1(A(Lib-D), exc) = [S5 j=1 (µj A(Lib-D) - µj exc)]0.5 = [ (0-0)2 ...
... 375, 0.475, 0.475, 0.1) D. Fuzzy inference These fuzzificated assessments μRLib-D, μMLib-D and μSLib-D are necessary to synthesize into assessment of A, using max-min composition. In this case it is possible to make C = 53 = 125 combinations, out of which the 80 outcomes. First outcome (3) ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)
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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)
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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
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A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
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Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation
kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje... 1997): lnV = 2 ∑ i=1 (lnλi )ni ⊗ ni (46) D o w n lo a d e d fro m h ttp s ://a c a d e m ic .o u p .c o m /g ji/a rtic le /2 2 6 /2 /9 8 4 /6 1 9 5 5 2 9 b y g u e s t o n 1 9 J u ly 2 0 2 1 996 T. Broerse et al. finite strain: d - | Hencky strain: In(A) 1.57 =a = © 1 7 ...
... becomes: [ δux δu y ] = Q [ 0 d ] + Q [ x y ] − [ x y ] , (50) where the first term represents the rotated shear displacements, and the last two terms combined are the rotation contribution. Fig. 9 shows the D o w n lo a d e d fro m h ttp s ://a c a d e m ic .o u p .c o m /g ji/a ...
... l deformation and that described by F the elements should be chosen sufficiently small. A P P E N D I X B : P O L A R D E C O M P O S I T I O N O F T H E D E F O R M AT I O N G R A D I E N T I N 2 D Analytic solutions exist for the decomposition of the deformation gradient F into the rotation tensor ...Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer. "Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation" in Geophysical Journal International, Oxford University Press (OUP) (2021). https://doi.org/10.1093/gji/ggab120
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O mogućnosti proizvodnog reaktiviranja ležišta cementnih laporaca Ralja kod Beograda
Ilić M., Kričak Lazar, Jagodić-Krunić D., Podunavac D.. "O mogućnosti proizvodnog reaktiviranja ležišta cementnih laporaca Ralja kod Beograda" in Zbornik radova XI Međunarodne Konferencije o površinskoj eksploataciji - OMC 2014, Zlatibor,Srbija:Jugoslovenski komitet za površinsku eksploataciju,Savez inženjera rudarstva i geologije Srbije (2014): 103-111
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Application of pulsed flash thermography method for specific defect estimation in aluminum
Tomić Ljubiša D, Jovanović Dalibor B, Karkalić Radovan M, Damnjanović Vesna, Kovačević Branko V, Filipović Dalibor D, Radaković Sonja S. (2015)Tomić Ljubiša D, Jovanović Dalibor B, Karkalić Radovan M, Damnjanović Vesna, Kovačević Branko V, Filipović Dalibor D, Radaković Sonja S.. "Application of pulsed flash thermography method for specific defect estimation in aluminum" in Thermal Science 19 no. 5, Belgrade:Vinca Institute of Nuclear Sciences (2015): 1845-1854
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Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3
Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)... Ždero Pavlović Sofija Bekić Snežana Papović Jelena Bajac 4na Đurović Tatjana Jurić Tatjana Majkić Jelena Tanasić Tijana Marjanović Marija Kostić Savetovanje Je podržalo /Supporfed by Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije Ministry of Science, Technological ...Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić. "Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3" in Book of Abstracts Proceedings / 59th Meeting of the Serbian chemical society, Novi Sad, Serbia, June 1-2, 2023, Belgrade : Serbian Chemical Society (2023)
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Geoloski profil planine Avale (severna Šumadija) - uvid u litostratigrafiju i tektonske strukture
Mezozojske formacije Šumadije dele tektonsko-stratigrafsku evoluciju južnijih delova suture jedinica Adrijskog i Evropskog afiniteta, uključujući gornjojursku obdukciju, krednu subdukciju i paleogenu kontinentalnu koliziju. Finalni rezultat dugovremene evolucije u geodinamički složenom ambijentu su komplikovani tektonski i litostratigrafski odnosi različitih mezozojskih formacija suture. Geološki profil kroz planinu Avalu omogućava uvid u skoro potpunu sukcesiju mezozojskih formacija i prostorne pozicije i kinematiku značajnih tektonskih struktura najsevernijih segmenata suture u Šumadiji. U tektonskom kontekstu, mezozojske formacije okoline Beograda najčešće su interpretirane kao deo Istočne ...Marinko Toljić, Bojan Glavaš-Trbić, Maja Maleš, Nikola Ranđelović. "Geoloski profil planine Avale (severna Šumadija) - uvid u litostratigrafiju i tektonske strukture" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022. , Srpsko geološko društvo (2022)
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Prirodno prečišćavanje i stimulisana bioremedijacija podzemnih voda zagađenih naftnim ugljovodonicima
Nenad M. Marić (2016-09-26)Disertacija se konceptualno sastoji iz dva dela kojima je obuhvaćen pasivan (prirodnoprečišćavanje) i aktivan remedijacioni pristup (stimulisana bioremedijacija) kodpodzemnih voda zagađenih naftnim ugljovodonicima.U prvom delu disertacije prikazani su rezultati osmatranja procesa prirodnogprečišćavanja u podzemnim vodama na lokaciji istorijskog zagađenja kerozinom.Tragovi zagađenja naftnim ugljovodonicima pronađeni su 20 godina nakon prosipanjakerozina. Ovo je stvorilo osnovu za proučavanje efekata dugotrajne izloženostipodzemnih voda procesima biodegradacije u terenskim uslovima. Uočeno je da sesnižene koncentracije elektron akceptora (O2, NO3-, SO42-) i povišene koncentracijemetaboličkih produkata biodegradacije ...... Beograd. 72. Kaluđerović D (2007) Prirodno prečišćavanje izdani. Doktorska disertacija, Rudarsko-geološki fakultet, Beograd. 73. Khan FI, Husain T, Hejazi R (2004) An overview and analysis of site remediation technologies. J. Environ. Manage. 71, 95–122. 74. Kostić A (2007) Inženjering zaštite ...
... EPA publication SW-846. Methods 32, 155–164. 136. Venosa D, Zhu X (2003) Biodegradation of Crude Oil Contaminating Marine Shorelines and Freshwater Wetlands. Spill Sci. Technol. B. 8, 163– 178. 137. von Gunten U, Zorbist J (1993) Biochemical changes in groundwater – infiltration systems: ...
... diskusija 147 A B A b u n d an ce A b u n d an ce Retention time (min) A b u n d an ce C A B A b u n d an ce A b u n d an ce A b u n d an ce A b u n d an ce Retention time (min)Retention time (min) A b u n d an ce A b u n d an ce C Slika 4.59. Gasni h ...Nenad M. Marić. "Prirodno prečišćavanje i stimulisana bioremedijacija podzemnih voda zagađenih naftnim ugljovodonicima" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-26)
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Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)
Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, SerbiaLiubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić. "Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)" in Stratigraphy and Geological Correlation, Pleiades Publishing Ltd (2020). https://doi.org/10.1134/S0869593820010037
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Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides
Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis... Contrary to the D, deformation phase that only affected the Paleozoic and Northem Triassic unit of the Drina- Ivanjica thrust sheet, D> deformation phase has also affected the Albian-Campanian transgressive succession providing further evidence for the timing of D, and D» events. As shown ...
... asymmetry of F, folds suggests top-WNW tec- tonic transport direction for D, phase. Transposition by solution and neo-crystallization of So„ bedding due to intense D, deformation was frequently observed (Fig. 3). Structures of D, phase were not observed neither in the Southern Triassic unit which ...
... the Paleozoic basement all the way to the Upper Cretaceous (Fig. 2a). The trend of F» fold axes and D» thrusts implies a NE-SW shortening direction for the D> phase (Fig. 2c). The vergence of D» thrusts and asymmetric F. folds are top-SW in the NE part of the study area, but top-NE in the SW ...Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor. "Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides" in Swiss Journal of Geosciences (2019)
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A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)
... Ratković J., Polomčić D., Bajić D., Hajdin B. FILIPOVIĆ, I. et al. (1976) National geological map of Serbia, scale 1:100,000, Obrenovac section (L 34-125). Belgrade: Geological, Hydrogeological, Geophysical and Geotechnical Research Institute - Geozavod. JAGODIĆ KRUNIĆ, D. and JOVIČIĆ, V. (2007) ...
... Belgrade: Yugoslav Opencast Mining Committee, pp. 259-266. POLOMČIĆ, D. et al. (2013b) Hydrodynamic characteristics of water supply source „Peštan“ (Lazarevac, Serbia). Vodoprivreda, 45, pp. 55-68. POLOMČIĆ, D., BAJIĆ, D. and ILIĆ, Z. (2014) Implementation of alternative forecasting hydrodynamic ...
... 293-300. 54 Ratković J., Polomčić D., Bajić D., Hajdin B. THE AMERICAN SOCIETY FOR TESTING AND MATERIALS (2016) Available from: http://www.astm.org/DATABASE.CART/WITHDRAWN/D5447.htm [Acessed 23/11/16]. ŠUBARANOVIĆ, T., PAVLOVIĆ, V. and POLOMČIĆ, D. (2013) Influence on environment of sealing ...Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin. "A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)" in Underground Mining Engineering no. 29, Belgrade : University of Belgrade - Faculty of mining and geology (2016): 43-54