Претрага
853 items
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Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics
Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar. "Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics" in Clay Minerals, Mineralogical Society (2019). https://doi.org/10.1180/clm.2019.49
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Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics
Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić. "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics" in Minerals, MDPI AG (2024). https://doi.org/10.3390/min14050511
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Middle Jurassic terebratulide brachiopods from the Jordan Valley (northwestern Jordan)
U radu je izvršena revizija i detaljan opis srednjojurskih brahiopoda Jordanske doline, a takodje su izdvojeni i novi taksoni. Sa profila Arda iz gornjeg bata (Hamam formacija) i donjeg keloveja (Muganija formacija) odredjeni su novi rod i vrsta Jordanithyris ardainensis. Iz gornjeg bata Hamam formacije (krečnjaci, dolomiti, peščari i laporci) izdvojena je vrsta Ptyctothyris quillyensis. Zajednica koju čine Arabatia bihinensis, Ectyphoria sinaiensis, Ptyctothyris quillyensis, Dorsoplicathyris dorsoplicata i Tubithyris jurayfahiensis potiče iz donjokelovejskih krečnjaka sa proslojcima laporaca Muganija formacije. Brahiopodi ...Howard R. Feldman, Barbara V. Radulović, Vladan J. Radulović, Fayez Ahmadc. "Middle Jurassic terebratulide brachiopods from the Jordan Valley (northwestern Jordan)" in Historical Biology, Taylor & Francis (2021). https://doi.org/10.1080/08912963.2019.1625347
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Callovian (Middle Jurassic) terebratulide brachiopods from the Jordan Valley (northwestern Jordan)
U radu je izvršena revizija srednjojurskih terebratulidskih brahiopoda Jordanske doilne, a takodje su spisku predhodne faune dodati i novi taksoni. Sa profila Tel el Dahab, iz kelovejskih stena (Muganija formacija) odredjeni su novi taksoni terebratulida: Kutchithyris simoni sp. nov. i Trigonithyris wilsoni sp. nov, koji su ovom prilikom opisani. Takodje, po prvi put se iz Jordana pominju i tri terebratulidske vrste: Bihenithyris barringtoni, Ptyctothyris daghaniensis i Sphriganaria cardioides koje su nadjene zajedno sa Bihenithyris weiri, a koje imaju šire ...Howard R. Feldman, Barbara V. Radulović, Vladan J. Radulović, Fayez Ahmad. "Callovian (Middle Jurassic) terebratulide brachiopods from the Jordan Valley (northwestern Jordan)" in Historical Biology, Informa UK Limited (2021). https://doi.org/10.1080/08912963.2019.1677643
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Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example
Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska. "Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2020). https://doi.org/10.1007/978-3-030-60227-7_29
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Метода променљивих околина за решавање проблема p-центра са поузданом мрежом
У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...Јована Рађеновић, Стефан Мишковић, Оливера Станчић. "Метода променљивих околина за решавање проблема p-центра са поузданом мрежом" in 50. Међународни симпозијум о операционим истраживањима SYM-OP-IS, Тара, Србија, 18-21.9.2023, Београд : Медија центар „Одбрана” (2023)
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Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia
Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin. "Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia" in Hydrogeology Journal, Berlin, Heidelberg : Springer, International Association of Hydrogeologists (2013). https://doi.org/10.1007/s10040-013-1025-9
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Some models for determination of parameters of the soil oscillation law during blasting operations
... and consequences that can affect facilities, is used. The equation of M.A. Sadovskii is given in the form: v “ K ¨ R´n “ K ¨ ˆ r 3 ? Q ˙´n (2) where we have: v—velocity of soil oscillation (m/s); K—coefficient conditioned by soil characteristics, as well as blasting conditions, where the explosive ...
... by M.A. Sadovskii. The equation of Sadovskii is commonly shown in the form: v “ K ¨ Qn red (11) There is a reduced amount of explosive Qred: Qred “ 3 ? Q r (12) R—distance from the blast site to the monitoring point (m); and Q—overall amount of explosive in a mine series (kg). Energies 2016, ...
... of the rock mass vi represent the approximate value of the function v “ K ¨ R´n, then we can presume that: r RN R1 vdR “ K r RN R1 R´ndR “ K n´1 ˆ 1 Rn´1 1 ´ 1 Rn´1 N ˙ “ K n´1 „ Rn´1 N ´Rn´1 1 pR1RNqn´1 “ ST “ řN´1 m“1 Sm ptrapezoidal formulaq (23) From Equation (23) we find that: ...Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić. "Some models for determination of parameters of the soil oscillation law during blasting operations" in Energies, Basel, Switzerland : MDPI (2018). https://doi.org/10.3390/en9080617
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Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)
In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinicaAna Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković. "Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)" in Swiss Journal of Geosciences, Springer (2019). https://doi.org/10.1007/s00015-018-0324-5
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Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)
Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović. "Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)" in Physics and Chemistry of Minerals, Springer Science and Business Media LLC (2014). https://doi.org/10.1007/s00269-014-0693-x
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Petrofizička svojstva krečnjaka postamenta spomenika „Pobednik” na Beogradskoj tvrđavi
Dijana Trajković (2024)Spomenik „Pobednik” je podignut 1928. godine na Gornjem gradu Beogradske tvrđave. Spomenik je predstavljen bronzanom muškom figurom sa orlom u desnoj ruci i spuštenim mačem u levoj ruci i delo je vajara Ivana Meštrovića, dok je postament delo arhitekte Petra Bajalovića. Postament je u vidu dorskog stuba sa kanelurama na visokoj kubičnoj bazi i izgrađen je od krečnjaka o čijem poreklu ne postoje zvanični literaturni podaci, ali u korelaciji sa ostalim objektima Beogradske tvrđave, pretpostavlja se da je za ...... Matović, V., 2009. Primenjena petrografija, Građevinska knjiga, Beograd, str. 11-35, 46—59. Čičulić-Trifunović, M., Rakić, M., 1977. List Novi Sad L 34 — 700, Osnovna geološka karta SFRJ 1:100 000. Zavod za geološka i geofizička istraživanja, Beograd. Čičulić-Trifunović, M., Rakić, M., 1977. ...
... Kečkemet, D., 2009. Život Ivana Meštrovića (1883.-1962.-2002.), Zagreb. Knežević, S., Milovanović, D., Korać, M. Seobe jednoh kamena kroz istoriju. Nepublikovano. 47 Matović, V., Gajić, V., Vasić, N., 2019. Metode ispitivanja sedimentnih stena. Univerzitet u Beogradu, Rudarsko – Geološki fakultet ...
... Zavod za zaštitu spomenika kulture grada Beograda. Čubrilović, V. (ur.), Beogradska tvrđava u prošlosti, sadašnjosti i budućnosti, naučni skupovi knj. XXXVI, Odeljenje istorijskih nauka knj. 9, SANU, Beograd, str. 91-102. Popović, M., 2006. Beogradska tvrđava, 2. dopunjeno izdanje, Javno preduzeće ...Dijana Trajković. Petrofizička svojstva krečnjaka postamenta spomenika „Pobednik” na Beogradskoj tvrđavi, 2024
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Uticaj utiskivanja gas-lift gasa na prenos mase i toplote
Branko Grubač (2019)Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...... al system.aspx [3] G. Takacs, Gas-lift manual, PennWell Corporation, Oklahoma, str 1-8, 255-270, (2005) [4] D. Danilović, V. Karović, B. Leković, M. Crnogorac, M. Tanasijević, Parametri koji definišu optimalnu proizvodnju naftnih bušotina pri primeni mehaničke metode eksploatacije, Tehnika ...
... [92] G. Couto, H. Chen, E. Dellecase, C. Sarica, M. Volk, An investigation of two-phase oil/water paraffin deposition, Society of Petroleum Engineers, SPE paper, str 49- 55, (2008) [93] D. Danilovic, V. Karovic-Maricic, R. Sokolovic-Secerov, D. Ivezic, M. Zivkovic, Laboratory testing and simulation ...
... disertacija Uticaj utiskivanja gas-lift gasa na prenos mase i toplote Branko Grubač 153 [104] М. Хуторской, Е. Тевелева, Л. Цыбуля, Г. Урбан, Tепловой поток в солянокупольных бассейнах евразии – сравнительный анализ, Геотектоника, № 4, str 3-19, (2010) [105] Aspen HYSYS: ...Branko Grubač. Uticaj utiskivanja gas-lift gasa na prenos mase i toplote, Beograd : Rudarsko-geološki fakultet, 2019
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Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer
Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)... 6 Djurif, D., Josipovid, J.,Zogovi{D.' I(omatina, M., Stevanovi{ 2., Diokt{ I. and Luk16, V. (2005) ICPDR Roof Report {or 2004,lnstitute WM "iarosiav Cerni", Document of MinistrY of Agrlculture Forest and Wateq Belgrade. 7 Soro, A., Dimki6, M. and |osiPovi6, ]' (1997) Hydrogeological investigations ...
... with impermeable strata. Sandy-gravel sediments represent major aquifer systems. Their thickness varies from less than 10 m up to 50 m, but is generally of the order of 10 to 20 m. The transmissivity coefficient ranges from 10-s to I0 a m2 s 1. The semi- permeable or fu1ly-impermeable sandy clays ...
... Management Multidisciplinary Approach Edited by Jacques Canoulis, Alice Aureli, and Jean Fried T'ransbou ndary Water Resou rces &rtranagement A M ultidisciplinary Approach WILEY- vcH WILEY-VCH Verlag CrnbH & Co. KCaA i: 4.9 Towards Sustainable Management of Transboundary Hungarian-serbian ...Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić. "Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer" in Transboundary Water Resources Management - A Multidisciplinary Approach, Weinheim, Germany : Wiley-VCH (2011): 143-149
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Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases
Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić. "Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases" in Chemical Papers, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s11696-021-01884-5
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Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia
We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić. "Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia" in Acta Geophysica, Springer (2019). https://doi.org/10.1007/s11600-019-00328-9
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Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
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Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia
Finds of Pleistocene rhinoceros are rare in Serbia, and only one species (the woolly rhinoceros Coelodonta antiquitatis Blumenbach, 1799) has been reported so far. The current paper presents the dental material of an extinct so-called Hundsheim rhinoceros, Stephanorhinus hundsheimensis Toula, 1902 from Bogovina Cave (East ern Serbia). Both the morphological and metric characteristics of the teeth are consis tent with the attribution to S. hundsheimensis. Unfortunately, the rhinoceros material originated from an uncertain geological context, so there is no ...... left M1/M2 HMP-135 in (K) occlusal, (L) vestibular, (M) lingual, (N) mesial, and (O) distal views. RADOVIĆ, RADONJIĆ, & BILLIA: HUNDSHEIM RHINO FROM SERBIA 6 appears remarkably brachydont. The outlet of the interior valley displays a classic V-shape in lingual view. In vestibular view, the crown ...
... Annales Géologiques de la Péninsule Balkanique, 61(2):161-175. (In Serbian with English translation) Cvetičanin, R. and Novković, M. 1975. The Bogovina Basin, p. 80-85. In Aksin, V. and Maksimović, B. (eds.), Geologija Srbije, Fosilna goriva, VII, Beograd. (In Serbian) Dimitrijević, M.D. 1997. Geology of ...
... reservoir construction-case example Bogovina. Materials and Geoenvironment, 50(1):105-108. Eisenmann, V., Alberdi, M.T., de Giuli, C., and Staesche, U. 1988. Methodology, p. 1-71. In Woodburne, M. and Sondaar, P. (eds.), Studying Fossil Horses, Vol. 1. E.J. Brill, Leiden. PALAEO-ELECTRONICA.ORG ...Predrag Radović, Miloš Radonjić, Emmanuel Billia. "Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia" in Palaeontologia Electronica, Coquina Press (2020). https://doi.org/10.26879/985
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Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema
Svetlana M. Štrbac-Savić (2016-06-10)Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija... con con mr con con m m m m m m 53,8 8 100 85,13; 85% 53,8 mr m 85 85 85 85 85 Cena metala Cinka (USD/t) 2160 2195 1950 1910 2160 Jedniniĉna vrednost prodajne cene koncetrata metala (USD/t) 0,85con con mr V P m m P 1836 1866 ...
... jcon j con j j dR G M QEV V m (4.10) Gde je: - Qgod - godišnja proizvodnja rude (x1), - con j V - je vrednost koncetrata metala, - Gj – sadrţaj korisne komponente u rudi (kvalitet rude) (%), - Mj - flotacijsko iskorišćenje (%), - con j m - sadrţaj metala u ...
... da vrednost M pripada nekom intervalu [a, b], ali M moţe uzeti stohastiĉke vrednosti za svaku godinu posmatranog vremenskog horizonta. 58 Druga bitna komponenta pri odreĊivanju prihoda rudnika je jediniĉna prodajna cena ili jediniĉna prodajna cena koncentrata metala ( con j V ). Ona direktno ...Svetlana M. Štrbac-Savić. "Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-10)
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Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems
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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Dimenzionisanje deponija za ugalj
... arrangements, Beltcon 8, http://www.saimh.co.za/beltcon/ beltcon8/paper818.html 7. Stevanović D.R, Kolonja B.M., Stanković RM., Knežević D.N., Banković M. V., 2013, Application of stochastic models for mine planning and coal quality control, www.doiserbia.nb.rs/img/doi/0354-9836/2013%20OnLine-First/ 0354- ...
... lokaciji potrošača) koristi samo kao rezerva. -100 -50 0 50 100 150 Ja nu ar Feb ru ar M ar t A pr il M aj Ju n Ju l A vg ust S ep te m ba r O kt oba r N ove m ba r D ece m ba r mesec od no s pr oi zv od nj e i p ot ro šn je u gl ja , h ilj ad a to n a ...
... a raspoloživi odlagači i izuzimači omogućavaju visine deponija i iznad 22 m. Međutim, valja računati i na mogućnosti mašina kojima se ugalj odlaže i izuzima. Odlagači obično rade u rasponu brzina 4-20 m/s, a izuzimači 1- 6 m/s. Za obe mašine je bolje da rade sa manjim brzinama. Ako je dužina deponije ...Dinko Knežević, Božo Kolonja, Ranka Stanković, Aleksandra Tomašević, Dragana Nišić. "Dimenzionisanje deponija za ugalj" in Jedanaesta međunarodna konferencija o površinskoj eksploataciji OMC, 2014, Zlatibor, 15-18 oktoba 2014, Zlatibor : Jugoskovenski komitet za površinsku eksploataciju (2014)