Претрага
114 items
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Fluid inclusion systematics in the Okoška gora polymetallic deposit
Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec. "Fluid inclusion systematics in the Okoška gora polymetallic deposit" in 25th meeting of Slovenian geologists, Ljubljana, 2021, Univerza v Ljubljani, Oddelek za geologijo (2021)
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The oil industry and climate changes
Dejan Radivojević (2020)Uprkos tome što je problem klimatskih promena poznat dugi niz godina i dalje veliki broj ljudi poistovećuje pojam vremenskih prilika sa klimom ne uzimajući u obzir različitu dužinu njihovog trajanja. U medijima se vrlo često mogu naći katastrofična predviđanja vezana za zagrevanje naše planete usled neodgovornog ponašanja čoveka. Sa druge strane geolozi znaju da je tokom geološke prošlosti naše planete bilo mnogo toplijih intervala od današnjih kao i da ti intervali nisu neminovno rezultovali masovnim izumiranjem živog sveta već su ...Dejan Radivojević. "The oil industry and climate changes" in Tehnika – rudarstvo, geologija i metalurgija, Savez inženjera i tehničara Srbije, Beograd (2020). https://doi.org/10.5937/tehnika2001031R
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Планирање – функција менаџмента пројекта минералне индустрије
Жељко Вучић (2024)Просторно планирање је комплексан мултидисциплинаран процес утврђивања оптималног распореда људи, добара и делатности на одређеној територији ради његове оптималне употребе. Циљ просторног планирања је распоредити и најбоље користити садржаје у простору што је неизводљиво без детаљних анализа потенцијалних, штетних агенаса на целокупно подручје и његово становнисштво. Утицај рударства на окружење вишеструко се повећао након увођења технологије површинске експлоатације минералних сировина, али и свеукупног лошег дејства на животну средину. Под појом животне средине подразумевамо природне и радом створене вредности у ...Жељко Вучић. Планирање – функција менаџмента пројекта минералне индустрије, 2024
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Rock Mass Quality Rating Based on the Multi-Criteria Grey Metric Space
Miloš Gligorić, Zoran Gligorić, Saša Jovanović, Suzana Lutovac, Dragan Pamučar, Ivan Janković (2024)klasifikacija stenske mase, višekriterijumska klasifikacija, klasa, metrički prostor, intervalni sivi brojeviMiloš Gligorić, Zoran Gligorić, Saša Jovanović, Suzana Lutovac, Dragan Pamučar, Ivan Janković. "Rock Mass Quality Rating Based on the Multi-Criteria Grey Metric Space" in Computer Modeling in Engineering & Sciences, Tech Science Press (2024). https://doi.org/10.32604/cmes.2024.050898
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Application of stochastic models for mine planning and coal quality control
Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković. "Application of stochastic models for mine planning and coal quality control" in Thermal Science, Belgrade : Vinča Institute of Nuclear Sciences (2014). https://doi.org/10.2298/TSCI130201031S
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Režim Kameničke reke (sliv reke Visočice)
Nenad Janaćković, Vesna Ristić Vakanjac, Veljko Marinović, Jugoslav Nikolić, Boris Vakanjac, Zoran Nikić (2024)Kamenička reka je desna pritoka reke Visočice. Svoj tok formira na donjotrijaskim sedimentnim stenama (alevroliti, peščari, konglomerati) i u ovom delu je razvijen dendritičan tip hidrografske mreže. Po prelasku na srednjetrijaske karbonatne stene ovaj tok postaje povremen, tačnije sukcesivno gubi vodu u delovima gde rasedne strukture presecaju korito ove reke, tako da tokom pojedinih godina i dužih sušnih perioda korito ove reke ostaje suvo. U radu je izvršena analiza režima proticaja Kameničke reke za 15-to godišnji osmatrački period (1964-1978), ...Nenad Janaćković, Vesna Ristić Vakanjac, Veljko Marinović, Jugoslav Nikolić, Boris Vakanjac, Zoran Nikić. "Režim Kameničke reke (sliv reke Visočice)" in 17. Srpski simpozijum o hidrogeologiji sa međunarodnim učešćem, Pirot, 2-6 oktobar 2024, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2024). https://doi.org/10.5281/zenodo.13740152
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SrpCNNeL: Serbian Model for Named Entity Linking
Ovaj rad predstavlja razvoj modela za prepoznavanje i povezivanje imenovanih entiteta (NEL) sa bazom znanja Vikipodaci za srpski jezik pod nazivom SrpCNNeL. Model je obučen da prepozna i poveže sedam različitih imenovanih tipova entiteta (osobe, lokacije, organizacije, profesije, događaji, demoni i umetnička dela) na skupu podataka koji sadrži rečenice iz romana, pravnih dokumenata, kao i rečenice generisane iz znanja Vikipodataka baza i Leksimirka leksička baza podataka. Dobijeni model je pokazao dobre performanse, postigavši F1 rezultat od 0,8 na test ...Milica Ikonić Nešić, Saša Petalinkar, Ranka Stanković, Miloš Utvić, Olivera Kitanović. "SrpCNNeL: Serbian Model for Named Entity Linking" in Annals of Computer Science and Information Systems, IEEE (2024). https://doi.org/10.15439/2024F8827
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XRD dertermination od hydrothermal phases related to epithermal mineralization in the Čukaru Peki deposit
Dragana Bosić, Vladica Cvetković, Miodrag Banješević, Kristina Šarić. "XRD dertermination od hydrothermal phases related to epithermal mineralization in the Čukaru Peki deposit" in V Congress of Geologists of Republic of Macedonia ": “Geology in a changing world”, Makedonsko geološko društvo (2024)
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Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature
U datom eksperimentalnom radu su termografskim metodama ispitivane termofizičke karakteristike različitih materijala. Za ispitivanja su izabrani mesingani niovčić, ugalj i pelet, jer imaju različita termoizolaciona svojstava i različito stanje površine. Uzorci su najpre hlađeni, a zatim je njihovo zagrevanje na sobnoj temperaturi praćeno termalnom kamerom. U drugom delu eksperimenta, korišćena je impulsna termografija, a zagrevanje površine uzoraka vršeno je svetlosnom pobudom.... for the tests - because they have different thermal insulation properties and different surface condition. The samples were first cooled and then let to be warmed to room - temperature was continuously being recorded by a thermal camera. In the second part of the experiment, pulsed thermography ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Katarina Nestorović. "Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature" in 65. godišnja konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku ETRAN 2021, Etno selo Stanišići, Republika Srpska, 8-10. septembar 2021., Društvo za ETRAN Beograd i Akademska misao Beograd (2021)
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Утицај соларне активности на здравље човека
Каролина Ђукић, Весна Цветков, Весна Дамњановић. "Утицај соларне активности на здравље човека" in VII Меморијални научни скуп из заштите животне средине доцент др Милена Далмација Нови Сад, 01-02. април 2019, Природно-математички факултет, Департман за хемију, биохемију и заштиту животне средине (2019)
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Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems
... infinite) tend from above to the critical disorder Rc; in the same limit the width of the transition region of disorder tends to zero [58]. Next, let us name as the spanning field each value Hsp of external field triggering a spanning avalanche at finite lattice [58]. For each value of disorder at ...
... effective critical disorder, its numerical values for l � 4 sys- tems lie above the theoretical prediction (19); cf. the inset in Fig. 9(b). Finally, let us point out that our predictions (10), (15), and (19), together with (20), (21), and (22), give only the leading terms in the scaling with l (and ...
... Technological Development of Republic of Ser- bia under project 171027. APPENDIX A: QUALITATIVE JUSTIFICATION OF SCALING HYPOTHESES (8) AND (9) Let us start from the statement that the correlation length becomes of the order of system size, ξ ∼ l , when disorder approaches the effective critical ...Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević. "Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems" in Physical Review E, American Physical Society (APS) (2019). https://doi.org/10.1103/PhysRevE.100.032113
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Nonequilibrium athermal random-field Ising model on hexagonal lattices
... 207 ± 0.004 1.107 ± 0.004 1.075 ± 0.005 1.036 ± 0.005 1.010 ± 0.005 and we show here that this happens due to the finite-size effects. To this end let us use the probability p(SNN , H, R) that the spin, whose sum of nearest neighbors is SNN , will flip if the disorder value is R and external field ...
... 265+0.004 1.207+0.004 1.107+0.004 1.075+0.005 1.036+0.005 1.010 + 0.005 and we show here that this happens due to the finite-size effects. To this end let us use the probability p(Sywy, H, R) that the spin, whose sum of nearest neighbors is Syw, will flip if the disorder value is R and external field is ...
... orientations are set to +1 in the beginning of the simulation and are prevented from changing during the simulation. A. Effective critical field Let us start from the problem of dependence of effective critical field on system’s disorder presented in Fig. 3(b) and Fig. 5. We repeated the same set ...Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević. "Nonequilibrium athermal random-field Ising model on hexagonal lattices" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.032147
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Karst groundwater quantity assessment and sustainability: the approach appropriate for river basin management plans
Veljko Marinović, Zoran Stevanović (2019)As a result of the fact that karstified rocks can accumulate large amounts of high-quality groundwater, karst aquifer is considered, throughout the world, one of the most important types of aquifers. Due to their high permeability, but also vulnerability to pollution, these precious groundwater resources need to be properly evaluated and protected. Taking into account heterogeneity and complexity of the karst environment, it is difficult to propose a uniform algorithm for managing karst groundwater, which causes the necessity to ...Upravljanje karstnim podzemnim vodama, Pritisci na kvantitet voda, Plan upravljanja vodnim resursima, Bosna i Hercegovina, SrbijaVeljko Marinović, Zoran Stevanović. "Karst groundwater quantity assessment and sustainability: the approach appropriate for river basin management plans" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8364-3
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Improvement of education through the cooperation between CEEPUS EURO Geo-Sci network and scientific projects: examples from UB-FMG
Kristina Šarić, Dejan Prelević, Miloš Marjanović, Uroš Stojadinović, Vladimir Simić . "Improvement of education through the cooperation between CEEPUS EURO Geo-Sci network and scientific projects: examples from UB-FMG" in V Congress of Geologists of Republic of Macedonia ": “Geology in a changing world”, Makedonsko geološko društvo (2024)
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An Efficient Class of Iterative Root-Finding Methods with Applications
Dejan Ćebić, Nebojša Ralević (2021)... to find the approximate roots. Probably the most widely used iterative method is the Newton method xn+1 = xn − f(xn) f ′(xn) , n = 1, 2, ... (1) Let α be a simple root of f(x) = 0 (i.e. f(α) = 0 and f ′(α) ̸= 0). If an initial approximation x0 is sufficiently close to α, then the Newton method is ...
... order methods. Theorem II.1 Suppose that f(x) is a sufficiently differen- tiable function on some open set D that encloses the simple root α, and let ψ4(·, ·) and ψ8(·, ·, ·) be any optimal fourth and eighth order methods with the Newton iteration as the first step, satisfying zn − α = 14 ∑ i=4 ...
... iterative schemes, which is also one of the basic requirements for designing a numerical algorithm. Exploring the basins of attraction in the complex plane of family (4) for different choices of ψ4 and ψ8 could be one possible direction of further investigations. Adopting the presented iterative scheme ...Dejan Ćebić, Nebojša Ralević. "An Efficient Class of Iterative Root-Finding Methods with Applications" in 2021 IEEE 19th International Symposium on Intelligent Systems and Informatics (SISY), IEEE (2021). https://doi.org/10.1109/SISY52375.2021.9582495
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Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty
Miloš Gligorić, Jelena Majstorović, Suzana Lutovac. "Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty" in Underground Mining Engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2018). https://doi.org/10.5937/PodRad1832001G
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An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction
... defined by f [a, b] = f(a)−f(b) a−b . Theorem 1. Assume that function f(x) is sufficiently differentiable in a neighbor- hood of its simple root α, and let M4(·, ·) and M8(·, ·, ·) be any optimal fourth and eighth order methods based on Newton’s method, satisfying zn − α = 16 ∑ i=4 Bie i n +O(e17n ) ...
... en = xn − α, B4 6= 0 and A8 6= 0. Then for any starting approximation x0 chosen close enough to α, method (1) is at least of sixteenth order. Proof. Let en = xn − α be the error of the n-th iteration. Then from Taylor’s expansion of f(xn) and f ′(xn) about α, we have f(xn) = f ′(α) ( en + 16 ∑ i=2 ...
... used in [6, 23, 30, 32, 34]. Before presenting the numerical results, we give a brief review of the basic concepts regarding basins of attraction. Let f : C → C be the rational map of the complex plain. Point x0 is called a fixed point for f if f(x0) = x0. Fixed point x0 is called attracting if |f ′(x0)| ...Dejan Ćebić, Nebojša Ralević, Marina Marčeta. "An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction" in Mathematical Communications (2020)
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Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić. "Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings" in Minerals, Basel : MDPI AG, Basel, Switzerland (2018). https://doi.org/10.3390/min8020070
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Uniaxial compressive strength test before and after standard fire test on rock mass
Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)... less presented, mostly small and sub-rounded. Feldspars, orthoclase and plagioclase, which originate from a granitoid rock, are dominated in rock. Let us mention that some of these grains are poorly altered, replaced by fine-grained sericite, which was most likely formed by alteration of this mineral ...
... divalent (ferro) iron. In Figure 1 is shown a microscopic image of rock sample. Figure 1. Microscopic image of a rock sample; picture left in plane polarized light, picture right in cross polarized light 2.2. Material sampling Two groups of 6 samples are tested according to SRPS EN 1926 ...Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović. "Uniaxial compressive strength test before and after standard fire test on rock mass" in Fifth symposium of the Macedonian Association for Geotechnics, Ohrid, North Macedonia, 23-25. 06. 2022, Macedonian Association for Geotechnics (2022)
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Geotehnički uslovi rekonstrukcije Zavičajnog muzeja u Jagodini
Milan Tokanović (2024)U radu su prikazana geotehnička istraživanja za potrebe rekonstrukcije Zavičajnog muzeja Jagodina.Zavičajni muzej u ulici Kneginje Milice br.82 u Jagodini, ima ozbiljna oštećenja pojedinih delova konstrukcije koja su nastala na objektu tokom više od 80 godina eksploatacije.Kako bi se trajno rešio problem dinamičke stabilnosti i statičke održivosti konstruktivnog sistema objekta,neophodno je bilo definisanje geotehničkih uslova u zoni interakcije prirodne sredine i konstrukcije predmetnog objekta.Izvedena su terenska i laboratorijska ispitivanja na osnovu kojih su dobijene geotehničke podloge. Na osnovu dobijenih geotehničkih podloga ...geotehnička istraživanja, Zavičajni muzej, temelji, fundiranje, nosivost, sleganje, istražne jame, laboratorijska geomehanička ispitivanja, Jagodina... istražnog prostora Geografski položaj i reljef formiraju klimu i njene odlike, pa tako umereno kontinentalnu klimu sa hladnim zimama i toplim letima, na teritoriji Opštine Jagodina, formira široka otvorenost prema Panonskoj niziji. Prosečna godišnja Geotehnička istraživanja terena za potrebe ...
... sa juga uslovljavaju ovakav raspored temperature. U zimskim mesecima, kada su temperature niske, relativna vlažnost vazduha je najveća, a tokom leta najniža. Sa prosečnom vlažnošću od 84%, decembar je najvlažniji, a jun sa 64%, najsušniji mesec. Najviše je padavina u maju (83mm), a najmanje u ...
... padavine, zatim jugoistočni (košava), severac, kao i južni vetar (razvigorac), koji duva tokom cele godine. Zapadni vetar, koji se javlja tokom leta, ima olujni karakter i često je praćen gradom. 4.2. Geološka građa terena U geološkoj građi terena u području širc istražne lokacije učestvuju ...Milan Tokanović. Geotehnički uslovi rekonstrukcije Zavičajnog muzeja u Jagodini, 2024