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764 items
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Дефинисање механичких својстава алтерисаног стенског материјала лабораторијским методама
Вељко М. Рупар (2022)Основни циљ овог рада је да представи методологију одређивања механичких својстава хетерогеног стенског масива који изграђују дацит (Д) и алтерисани дацит (АД), где је уочена је зона постепеног преласка од алтерисаног дацита до дацита. Механичка својства стенског масива у тој зони утврђена су на основу лабораторијских испитивања једноосне и троосне чврстоће на притисак стенског материјала композитних узорака. Композитни узорци су се састојали од дискова стенског материјала, при чему је висина дискова h дефинисала различити процентуални удео појединог стенског материјала, ...дацит, алтерисани дацит, једноосна чврстоћа на притисак, троосна чврстоћа на притисак, композитни узорци, механика стена, стабилност косинаВељко М. Рупар. Дефинисање механичких својстава алтерисаног стенског материјала лабораторијским методама, Београд : [В. Рупар], 2022
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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite
Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...... 3400 3575 ___ ——— s ___ _— d) |--7" - — 3740 d)) c |-- ——· —— — I r — TTAA K_ s Fi 3670 -i 3220 3400 3555 8, 5 _ -. ——\ b) 3 —— \ <| _ — c) WJE — Y | ___ \ 3) T T T T ı 3000 3250 3500 3750 4000 Wavenumber / cm" Figure 4. FTIR ATR spectra of samples (a-d) (see Figure 1) in the O-H/H»O ...
... are found in samples a, b and d, while albite is found only in samples a and b. Crocidolite is found in samples b and d, while tremolite is found in samples b and c. Diopside and orthopyroxene are found in samples b and c, while talc is found in samples c and d. Minor abundant mineral phases noticed ...
... [13]. Figures 3 and 4 show representative FTIR ATR spectra collected on powdered fragments of the shards. Spectrum d/ has been recorded on a fiber bundle extracted from sample d. The bands, for instance, the Si-O stretching, and bending, modes at ~960 (1015 and 1080) and 620 cm-! (Figure 3), ...Philippe Colomban, Aleksandar Kremenović. "Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite" in Materials, MDPI AG (2020). https://doi.org/10.3390/ma13163597
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The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia
... 103283. Nytoft, H.P., Kildahl-Andersen, G., Lindström, S., Rise, F., Bechtel, A., Mitrović, D., Đoković, N., Životić, D., Stojanović, K., 2019. Organic Geochemistry 129, 14–23. Stojanović, K., Životić, D., 2013. International Journal of Coal Geology 107, 3–23. ...
... Lusatia I. Kojic, J. Kus, D. Zivotic, K. Stojanovic Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia | I. Kojic, J. Kus, D. Zivotic, K. Stojanovic ...
... France THE POTENTIAL OF BIOMARKERS TO DISTINGUISH LOWER AND MIDDLE MIOCENE LIGNITES FROM THE COAL-MINING DISTRICT OF LUSATIA I. Kojić1, J. Kus2, D. Životić1, K. Stojanović1 1University of Belgrade, Serbia 2Federal Institute for Geosciences and Natural Resources, Germany The organic geochemical ...I. Kojic, J. Kus, D. Zivotic, K. Stojanovic. "The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia" in 30th International Meeting on Organic Geochemistry (IMOG 2021), European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202134092
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Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS
Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan. "Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS" in X Međunarodna konferencija UGALJ, Zlatibor, Srbija, 13-16. Oktobar 2021., Jugoslovenski komitet za površinsku eksploataciju (2021)
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Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017
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Tektono-termalna evolucija kontakta Dinarida i Karpato-Balkanida u području Jastrepca
Dalibor Erak (2019)Predmet istraživanja doktorske disertacije je tektonska evolucija područja planine Jastrebac u centralnoj Srbiji, gde višefazna tektonska aktivnost od mezozoika do danas komplikuje rekonstrukciju strukturnih odnosa i geološke evolucije ovog prostora. Kompleksna višefazna evolucija planine Jastrebac u Srbiji je demonstrirana kombinovanjem kinematskih podataka prikupljenih na terenu i mikrostrukturnih opservacija sa dodatnim termohronološkim podacima “fission track” i podacima odredbe starosti metodom U-Pb na cirkonima. Gornjokredna ekshumacija bila je praćena gornjokredno-eocenskim navlačenjem i magmatizmom vezanim za kontinentalnu koliziju, pri čemu je akreciona ...... International Journal of Earth Sciences 100, 1181-1206. Schefer, S., Egli, D., Missoni, S., Bernoulli, D., Gawlick, H.-J., Jovanović, D., Krystyn, L., Lein, R., Schmid, S.M., Sudar, M., 2010. Triassic sediments in the D. Erak: Tektono-termalna evolucija kontakta Dinarida i Karpato-balkanida u području ...
... Matenco, L., Radivojević, D., 2012. On the formation and evolution of the Pannonian Basin: Constraints derived from the structure of the junction area between the Carpathians and Dinarides. Tectonics 31, TC6007, doi: 10.1029/2012tc003206. Meinhold, G., Kostopoulos, D., Frei, D., Himmerkus, F., Reischmann ...
... digitalizovana D. Erak: Tektono-termalna evolucija kontakta Dinarida i Karpato-balkanida u području Jastrepca 11 geološka karta šireg područja planine Jastrebac, koja je inovirana na bazi informacija prikupljenih tokom izvedenih terensko-kabinetskih istraživanja (Prilog 1). D. Erak: Tektono-termalna ...Dalibor Erak. Tektono-termalna evolucija kontakta Dinarida i Karpato-Balkanida u području Jastrepca, Beograd : Rudarsko-geološki fakultet, 2019
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Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication
... white rectangle. Cretaceous Research 151 (2023) 105623 Z. Vašiček, D. Rabrenović, P. Skupien et al. STIOJMOU NO|HJHOLUQTIS| snuo/ide|Jeuie|e|}huoy\ —*- snjouip s n u o / g d e y u n d ) 2 u l ) snjejound s n u o / Q d e ) o u n c OjSIJeoqns BiJejeJe5o} — esueuo/(ouq seje2oouanojsqns ...
... such specimens, the diameter of the shell, D, for which the measurement was made to one-tenth of a mm (or Dmax, indicating the maximum preserved shell size), as well as the height of the whorl (H), width of the umbilicus (U), and the ratios of H/D and U/|D are given in paren- theses. The width of ...
... qns ___ee- snjejnojossj sojtuejdqnsopnescj —___e- IJouoj s e j u u e J j d q n s o p n o s c e e e — - Jedse '}o SeJeO!SOqJE}/ • uunojojd '} SeJaolJeJ5aN • s n o n u o d ·}o s e j i u p / d q n s o p n e s c ___ __e-– _ – I I uunujuu SeJeoiJeuBeN- 'ds sejiue/u00g ...Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović. "Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication" in Cretaceous Research (2023). https://doi.org/10.1016/j.cretres.2023.105623
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... 2. Polomčić, D., Bajić, D., Ristić-Vakanjac, V., Čokorilo, M., Drašković, D., Špadijer, S., Hydrodynamic Characteristics of the Water Supply Source „Peštan“ (Lazarevac, Serbia), Vodoprivreda, 261-263, Serbian Irrigation and Drainage Society, Belgrade, pp 55-68, 2013. 3. Đurić, D., Lukić, V., ...
... Pušić, M., Vidović, D., Đurić, D., Boreli-Zdravković, Đ., Pollution Transport analysis in defining the Sanitary Protection Zones of Groundwater Sources in Alluvial Areas, Vodoprivreda, 264-266, Serbian Irrigation and Drainage Society, Belgrade, pp 203-218, 2013. 12. Pollock, D. W., User's Guide ...
... Technology Ltd., Sofia, Bulgaria, pp 599-606, 2011, http://dx.doi.org/10.5593/sgem2011/s02.136 7. Polomčić, D., Stevanović, Z., Dokmanović, P., Ristić-Vakanjac, V., Hajdin, D., Milanović, S., Bajić, D., Optimization of Groundwater Supply in Serbia, Proceedings of http://dx.doi.org/10.1007/s10040-013-1025-9 ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)
Miloš Radonjić (2020)This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides... the next 4 m of unit C. 3.4. Unit D (interval: 25.25 to 31.75 m of the column) Unit D begins at 25.25 m from the start of the column and is 6.5 m thick. Turbidite beds composed of medium-grained sandstones and siltstone/mudstones are the dominant members of unit D (Fig. 7a). Their characteristics ...
... hummocky-type to unidirectionally inclined lamina- Figure 7. Sedimentary characteristics of unit D. (a) The transition from unit C into unit D. The change is noticeable in the onset of fining-upward sequences (unit D) compared to sandstone/siltstone repetition (unit C). A gradual change of colour also marks ...
... onset of unit D is marked by a sharp change in facies association compared to unit C. Aside from the general similari- ties described above, differences within units A and D are most notably the rare occurrence of S3 facies (fine-grained sandstones with climbing ripples) within unit D. In terms of ...Miloš Radonjić. "Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)" in Geologia Croatica, Croatian Geological Survey (2020). https://doi.org/10.4154/gc.2020.13
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The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja 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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Progress and improvement of the status of groundwater in Serbia, Invited Paper
Dimkić Milan, Stevanović Zoran, Đurić Dušan. "Progress and improvement of the status of groundwater in Serbia, Invited Paper" in Proceedings / IWA Specialist Groundwater Conference, 08-10 September 2011, Belgrade, Serbia, Belgrade: Institute for the Development of Water Resources Jaroslav Èerni (2011): 81-101
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Squamate remains from the Early and Middle Pleistocene Srem series in the Mutalj Quarry (Beočin, Northern Serbia)
Đurić Dragana, Bogićević Katarina, Nenadić Draženko. Squamate remains from the Early and Middle Pleistocene Srem series in the Mutalj Quarry (Beočin, Northern Serbia) no. 1, Struga:, 2016: 351-357
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Standardization of Serbian gravity database on a test area
Vasiljević Ivana, Ignjatović Snežana, Đurić Dragana. "Standardization of Serbian gravity database on a test area" in 9th Congress of the Balkan Geophysical Society (BGS 2017), Antalya, Turkey, 5. - 9. Nov, 2017, http://www.earthdoc.org:EAGE (2017): 1-5
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Application of simple forecasting methods on vertical electrical sounding data
Filip Arnaut, Vesna Cvetkov, Dragana Đurić. "Application of simple forecasting methods on vertical electrical sounding data" in XVIII Kongres geologa Srbije, Divčibare, Srbija (01-04.2022.), Srpsko geološko društvo (2022)
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Prognoziranje iznadprosečnih vrednosti kvaliteta vazduha u Novom Sadu koriščenjem Random Forest modela
Filip Arnaut, Vesna Cvetkov, Dragana Đurić. "Prognoziranje iznadprosečnih vrednosti kvaliteta vazduha u Novom Sadu koriščenjem Random Forest modela" in 10. Memorijalni naučni skup iz zaštite životne sredine docent dr Milena Dalmacija Novi Sad, 30-31.03. 2023., Novi Sad : Prirodno-matematički fakultet, Departman za hemiju, biohemiju i zaštitu životne sredine (2023)
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Fosilni ostaci fosilnih kičmenjaka u pećinskim naslagama Srbije
Katarina Bogićević, Dragana Đurić, Draženko Nenadić. "Fosilni ostaci fosilnih kičmenjaka u pećinskim naslagama Srbije" in Zbornik radova sa naučnog skupa „Kras-vekovna naučna inspiracija“, Beograd, 23. septembar 2022, Univerzitet u Beogradu - Geografski fakultet (2022)
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Uslužni brzi servis mašina pomoćne mehanizacije: uticaj na projekciju troškova hodnog stroja guseničara
Predrag Jovančić, Radiša Đurić, Petar Pavlović. "Uslužni brzi servis mašina pomoćne mehanizacije: uticaj na projekciju troškova hodnog stroja guseničara" in 5. savetovanje sa međunarodnim učešćem Zaštita životne sredine i održivi razvoj, Tara, 15. - 17. mart 2017., Beograd : Privredna komora Srbije (2017)
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Development of integrated fuzzy model for mine management optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)... triangular fuzzy number, the fuzzy synthetic extent is calculated using; the following; equation: m i n m -1 m m m 1 1 1 S -Ž MLe|.2.MA, |Ž,D-> 552 d|| _—R — L — j=1 i=1 j=1 jel jcl je1 Mdj XOsj M i=l i=l i=1 Step 3. The degree of possibility of two triangular fuzzy numbers is deter- mined ...
... its application to pproximate reasoning,, Information sciences, 8, 199—249. Š| CHANG D. Y. (1996) Applications of the extent analysis method on fuzzy AHP, Rur. J. Oper. Res., 95, 649 655. “} ZnU K., Y. JING, D. CHANG (1999) A discussion on extent analysis method and applications of fuzzy AHP, Eur ...
... Fuzzy Logic in Data Mining Process. In: Bai Y., Zhuang H., Wang D. (eds), Advanced Fuzzy Logic Technologies in Industrial Ap- ications, Advances in Industrial Control, London, Springer, DOT: 10.1007,978-1- 84628-469-4 _17. BAJIĆ S., D. BAJIĆ, B. GLUŠČEVIĆ, V. RISTIĆ VAKANJAC (2020) Application of ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of integrated fuzzy model for mine management optimization" in Comptes rendus de l'Académie Bulgare des Sciences (2023)
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Inoviranje tehnologije sanacije vertikalnih jamskih prostorija
Nebojša D. Ilić (2004)Nebojša D. Ilić. Inoviranje tehnologije sanacije vertikalnih jamskih prostorija, Beograd:Rudarsko-geološki fakultet, 2004