Претрага
852 items
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Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems
... value H j (R) of the external field at which the system experiences a first-order phase transition manifested in a jump of magnetization �M(R) that is caused by infinite avalanche(s). Both H j (R) and �M(R) depend on disorder R, and, when R tends to Rc from below, the transition field H j (R) tends ...
... approximations have been proposed so far. Thus, r= (R—R.)/R, ’ =H — H, + br, and 1/L was pro- posed by Sethna etal. (see Ref. [3] and the references therein), whereas Perez-Reche and Vives [63] proposed u = u; + Au; and v =v; + B’u, instead of r and h’, where uj = (R— R.)/Re and v; = (H — H.)/H,. Although seemingly ...
... appropriate exponents. In the case of infinite RFIM systems and x1 = r, x2 = h′ this implies that the reduced magnetization m = −∂g/∂h′ satisfies m(r, h′) = a−1+α2 m(aα1 r, aα2 h′), or equivalently m(r, h′) = |r|(1−α2 )/α1M±(h′|r|−α2/α1 ), 032113-11 CRITICAL DISORDER AND CRITICAL MAGNETIC FIELD ...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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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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Threshold-induced correlations in the Random Field Ising Model
Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević. "Threshold-induced correlations in the Random Field Ising Model" in Scientific Reports, Springer Science and Business Media LLC (2018). https://doi.org/10.1038/s41598-018-20759-6
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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 ...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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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction methodMiloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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Contribution to the geotechnical classification of municipal waste landfills in Serbia
Management, Monitoring, Policy and Law, Nature and Landscape Conservation, Geochemistry and Petrology, Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental Engineering... 37·86 100·0 100 Ada Huja 90 80 70 60 50 40 30 20 10 0 IC 26·6% R 73·4% 1 10 100 Grain size d: mm P e r ce n t fi n e r b y w e ig h t: % R u b b e r – 6 ·1 % T e xt ile – 1 2 ·6 % P a p e r – 1 9 ·8 % P la st ic – 6 1 ·5 % Cumulative Plastic Paper Textile ...
... UnclassifiedP e r ce n t fi n e r b y w e ig h t: % R u b b e r – 1 ·6 % W o o d – 2 ·9 % T e xt ile – 3 ·4 % P a p e r – 5 ·3 % M e ta l – 5 ·7 % C e ra m ic s – 8 ·9 % G la ss – 1 4 ·3 % U n cl as si fi ed – 5 7 ·9 % R 49·5% IC 50·5% ...
... Sad 100 90 80 70 60 50 40 30 20 10 0 1 10 100 Grain size d: mm R u b b e r – 6 ·4 % T e xt ile – 9 ·1 % P a p e r – 2 1 ·0 % P la st ic – 6 3 ·5 % R 85·4% IC 14·6% P e r ce n t fi n e r b y w e ig h t: % Cumulative Plastic Paper Textile Rubber Figure ...Dragoslav Rakić, Irena Basarić, Laslo Čaki, Slobodan Ćorić. "Contribution to the geotechnical classification of municipal waste landfills in Serbia" in Environmental Geotechnics, Thomas Telford Ltd. (2018). https://doi.org/10.1680/jenge.18.00028
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Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu
Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić. "Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022., Srpsko geološko društvo (2022)
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Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study
Debris flows are among the most dangerous erosional geohazards due to the fast rate of movement and long runout zones. Even though the initiation can be triggered in mountainous areas, inhabited and with steep slopes, their propagation and deposition can endanger not only buildings and infrastructure in the urbanized areas, but also threaten human lives. As these initiation areas usually represent unattainable terrains with rapid vegetation cover development, field observations and aerial photo analysis become high-demanding tasks. Consequently, medium-to-regional ...Ksenija Micić, Miloš Marjanović, Biljana Abolmasov . "Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study" in Proceeding of the 6th Regional Symposium on Landslides in the Adriatic-Balkan Region, ReSyLAB 2024, University of Belgrade, Faculty of Mining and Geology (2024). https://doi.org/https://doi.org/10.18485/resylab.2024.6
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Preliminary regional landslide susceptibility assessment using limited data
Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska. "Preliminary regional landslide susceptibility assessment using limited data" in Geologica Croatica , Croatian Geological Society (2019). https://doi.org/10.4154/gc.2019.03
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Effects of external noise on threshold-induced correlations in ferromagnetic systems
... ns obtained for four systems such that their dimensions L, disorders R, and threshold levels Vth satisfy conditions Eq. (6): L = 1448, R = 2.27,Vth = 75, L = 2046, R = 2.25,Vth = 102, L = 2508, R = 2.24,Vth = 126, and L = 3072, R = 2.231,Vth = 153. On the main panels are shown the collapses of the ...
... threshold axis by the amount p(σ ), it overlaps with the distribution n(Tw; R,Vth, σ = 0, L): n(Tw; R,V ′ th − p(σ ), σ, L) = n(Tw; R,Vth, σ = 0, L). (2) For the fixed R > Rc, where Rc = 2.16 is the critical disor- der in the three-dimensionalnonequilibrium RFIM [49], the shift parameter is independent ...
... the noise standard deviation), while r = (R − Rc)/R represents reduced disorder of the system. The exponent αint is used because the data was gathered from the finite windows of the external magnetic field [55,68]. This means that the distribu- tions DTw (Tw;Vth, r, 1/L) of the waiting time, Tw multiplied ...Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević. "Effects of external noise on threshold-induced correlations in ferromagnetic systems" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.062114
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Reprint of Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: implication on grindability index
Životić Dragana, Bechtel A., Sachsenhofer R., Gratzer R., Radić D., Obradović M., Stojanović Ksenija (2015)Životić Dragana, Bechtel A., Sachsenhofer R., Gratzer R., Radić D., Obradović M., Stojanović Ksenija. "Reprint of Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: implication on grindability index" in International Journal of Coal Geology 157, Amsterdam, Netherlands:Elsevier BV (2015): 165-183. https://doi.org/10.1016/j.coal.2014.07.004
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The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics... taking into account the driving rate, we have modified the scaling (B.3) and (B.4) to the forms mR,L(H) = |r|βM̃±(h ′/|r|βδ, 1/L|r|ν, Ω|r|ν), (B.5) χR,L(H) = |r|β−βδX̃±(h ′/|r|βδ, 1/L|r|ν, Ω|r|ν). (B.6) Given that the systems parameters satisfy the conditions Lrν = const. and Ωrν = const., the scaling ...
... distributions For finite systems in the adiabatic regime, the finite-size scaling of M and χ is of the form mR,L(H) = |r|βM̃±(h ′/|r|βδ, 1/L|r|ν), (B.3) χR,L(H) = |r|β−βδX̃±(h ′/|r|βδ, 1/L|r|ν). (B.4) In order to test the validity of the aforementioned scaling for the finite driving case, we have performed ...
... mR(H) = |r|βM±(h ′/|r|βδ), (B.1) and χR(H) = |r|β−βδX±(h ′/|r|βδ). (B.2) https://doi.org/10.1088/1742-5468/ac1f12 18 J . S ta t. M e c h . (2 0 2 1 ) 0 9 3 3 0 1 The effect of finite driving rate on avalanche distributions Figure B1. (a) Single-run magnetizations for system with L = 512, R = 2.12–2 ...Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
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Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8
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Хазард од клизишта у Србији у 21. веку
Biljana Abolmasov (2019)Biljana Abolmasov. "Хазард од клизишта у Србији у 21. веку" in Геохазард у Србији у 21. веку – знање је најбољи бедем против стихије, Српска академија наука и уметности (2019)
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Impact of Covid-19 on the Mining Sector and Raw Materials Security in Selected European Countries
Andrzej Gałaś, Alicja Kot-Niewiadomska, Hubert Czerw, Vladimir Simić, Michael Tost, Linda Wårell, Slávka Gałaś (2021)Andrzej Gałaś, Alicja Kot-Niewiadomska, Hubert Czerw, Vladimir Simić, Michael Tost, Linda Wårell, Slávka Gałaś. "Impact of Covid-19 on the Mining Sector and Raw Materials Security in Selected European Countries" in Resources, MDPI AG (2021). https://doi.org/10.3390/resources10050039
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials... can use [2], Theorem 4.6.3. Consequently, for all L, R such thatO
... function, resulting from the previous corollary: 572 D. Stankov / C. R. Acad. Sci. Paris, Ser. | 354 (2016) 569-576 1 lim yeardin < NL < ||n@|| < R} =2(R—-L), N>oo 1 1 lim —card{n < N|L <||n =||<R}=2(R-L). Jim, jcard{n < NiL <|Ino+ >| <R}=2(R—L) Let K; < K be natural number such that Qy', Qs',..., Qk, are ...
... zero in R/Z when θ is a Pisot number. If θ is a Salem number then (θn)n≥1 is dense in R/Z, i.e. the fractional parts of θn are dense in the unit interval [0, 1], but are not uniformly distributed. (See [2], pp. 87–89.) Moreover, Salem numbers are the only known numbers whose powers are dense in R/Z. A ...Dragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
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Допринос одређивању безопасног растојања при извођењу минирања
... rzacuH [2,3]: v=-K,R .1 ede cy: – Op3uHa ocnuJIoOBabba uecTHIIa TJIA V MHHMHpabeM no0yleHe cpejiHe, cm/s – KOCOD. H ČKCHOHCHT KOJH 3A4BHCC OJL IŽ“ yCHOBa MHHHpaMba H KapaKkTepHcTHKa pajiHe cpejuHe, - pejNlyKOBaHO pacToOjaĐe, KOje CC R MOXE H3pa3HTH OJIHOCOM R=r/{Qa p pacrojape OJ MeCTa ...
... O0e30ebDeHa je y3 ycJloB: r>15,797 3/Qa, „(m) (3.6.) rnmeje: r—-— (OesonacHo pacrojabe,(m) 178 Quk — yKyHHO yHnoTpcOJbeHa KOJIHUHHA eKcIIo3HBa, (kg). rpH MeMy TpeOa BOJIHTH pauyHa, Ipe CBaKOTr | MMHHHpaPa, a pe)nyKoBaHo pacrojaec (R) Oyne Behc HHH jemHako R > 15,797 rama he oueKHBaHa Op3HHa ...
... MOTy OJIpa3HTH Ha OKOJIHe O0jekTe. r= 15.797 Q B e z b e d n o ra st oj an je , r (m ) O 250 500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 Kolicina eksploziva, Q (kg) Cimka 3.2. KpaBa Oe3onacHor pacrTojahba (r) y 33BHCHOCTH OJI KOJIHUHHC CKCIIJIO3HBa ...Slobodan Trajković, Sanja Bajić, Ivan Krsmanović. "Допринос одређивању безопасног растојања при извођењу минирања" in ДИТ : Друштво истраживање технологије (2023)
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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 ...... μ μ i H j μ 12345 (R)1.0000.500.750.25j12345 (M)1.0000.500.750.25j12345 (F)1.0000.500.750.25j12345 (E)1.0000.500.750.25j 12345 (R)1.0000.50pooradequategoodaverageexcellent0.750.25jt, mh8046785412401627 12345 (R)1.0000.50pooradequategoodaverageexcellent0 ...
... inappropriate. Theoretically, it would be correct if the shortest and the longest expected time would be taken into consideration, i.e. times t for R(t)→0, R(t)→1; or M(τ)→0, M(τ)→1. However, these times are usually excluded from consideration as unrealistic. The detailed explanation of this procedure ...
... study - section 4.2.3. 3.3 Fuzzy Inference Engine – The Model of Max-Min Composition Partial indicators of effectiveness, R, M and F are presented as membership function μ: R = (μR1,…, μR j,…, μR n); M = (μM1,…, μM j,…, μM n); F = (μF1,…, μF j,…, μF n); (4) Such membership functions could ...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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Хидрогеохемијске карактеристике и квалитет вода слива Требишњице, Република Српска, Босна и Херцеговина
Dragoslav R. Banjak (2016-08-25)Упркос неповољном временском и просторном распореду, воде су најзначајнијиприродни ресурс Источне Херцеговине. Ова чињеница довела је до реализацијепројекта „Вишенамјенског хидросистема Требишњица“, којим је, премаМилановићу (2006), до сада обухваћено: седам хидроелектрана, шестакумулација, шест брана, шест тунела укупне дужине 59,7 km, неколикоприступних тунела, 62,5 km бетонског канала кроз Попово поље, канал крозДабарско (6750 m) и Фатничко поље (2770 m) и систем тунел-канал или цјевоводпрема Дубравама.У почетку са доминантним енергетским предзнаком, концепција јетрансформисана у интегрално рјешење вишенамјенског коришћења и заштитевода и животне ...хидрогеохемијски процеси, мултиваријантна статистичкаанализа, инверзно геохемијско моделовање, квалитет воде, употребиљивост водеза наводњавање, слив ТребишњицеDragoslav R. Banjak. "Хидрогеохемијске карактеристике и квалитет вода слива Требишњице, Република Српска, Босна и Херцеговина" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)