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Упит dcterms_subject_txt:grain size distribution

508 items

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... the zonal marker for the stratigraphically higher Fortis Zone (Reh4- nek, 1992). But, in order to accept and make a correction to this cyst distribution and also a possible zonal scheme in the future, additional information is needed. Despite the fact that one cyst resembles Carpistomio- sphaera ...
    ... zones)-Early Tithonian age (Pulla— Malmica zones; Grabowski and Pszczotkowski, 2006; Jach et al., 2012; Grabowski ef al., 2013). Regional distribution and age of radiolarites The data presented above on the basis of integrated bio- stratigraphy and isotope stratigraphy permit the sedimenta- ...
    ... from the Manin Unit (Butkov Klippe, Middle Vah valley, Western Carpathians). Mineralia Slovaca, 31: 79-86. RehakovaA, D., 2000. Evolution and distribution of the Late Juras- sic and Early Cretaceous calcareous dinoflagellates recorded in the Western Carpathian pelagic carbonate facies. Minerafia ...

  • Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization

    Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić (2016)

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia

    Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović (2024)
    lokalni putevi, prirodni hazardi, otpornost na klimatske promene, MaPLoRds

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... from blast furnace slag using acid baking-water leaching. RSC advances, 10 (53), p.31936-31946. [171] Seleka, B.V., 2021. The effect of particle size separation on the enrichment and recovery of rare earth elements from South African coal fly ash. [172] Kashiwakura, S., Kumagai, Y., Kubo, H. and ...
    ... Rohitha, S., Premasiri, R., Abeysinghe, B., Ratnayake, N. and Dissanayake, K., 2020. The story of rare earth elements (REEs): Occurrences, global distribution, genesis, geology, mineralogy and global production. Ore Geology Reviews, 122, p.103521. [4] Fernandez, V., 2017. Rare-earth elements market: ...
    ... resources, and challenges for resourcing future generations. Nafura/ Resources Research, 27, p.201-216. [9] Kursun Unver, I. and Terzi, M., 2018. Distribution of trace elements in coal and coal fly ash and their recovery with mineral processing practices: A review. Joural of Mining and Environment ...

  • Multiple-Criteria Decision-Making in Mine Development Planning

    Sanja Bajić (2023)
    The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.

  • Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)
    oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem
    ... Origin of sediments during Cretaceous continent- continent collision in the Romanian South Carpathians: preliminary constraints from 40Ar/39Ar single-grain dating of detrital white mica. Geol. Carpath. 56 (5), 375–382. Neubauer, F., Fritz, H., Genser, J., Kurz, W., Nemes, F., Wallbrecher, E., Wang, X ...
    ... fault-slip measurements are taken along faults that do not have large offsets (i.e., kilometres to tens of kilometres) that are comparable with the fault size (e.g., Twiss and Unruh, 1998), which contrasts with the measured kinematics along faults that have offsets reaching tens of kilometres. Kinematic ...
    ... lines, showing the situation before (blue) and after (green) the deformation. Black arrows show displacement variability due to the slab pull. Arrows' size indicates a relative difference in displacement magnitude. Note the increase in dis- placements westwards and northwards, created by slab pull. Grey ...

  • Resource-based WordNet Augmentation and Enrichment

    Ranka Stanković, Miljana Mladenović, Ivan Obradović, Marko Vitas, Cvetana Krstev (2018)
    In this paper we present an approach to support production of synsets for SerbianWordNet(SerWN)byadjustingPrincetonWordNet(PWN)synsetsusing several bilingual English-Serbian resources. PWN synset definitions were automatically translated and post-edited, if needed, while candidate literals for Serbian synsets were obtained automatically from a list of translational equivalents compiled form bilingual resources. Preliminary results obtained from a setof1248selectedPWNsynsetsshowthattheproducedSerbiansynsetscontain 4024 literals, out of which 2278 were offered by the system we present in this paper, whereas experts added the remaining 1746. Approximately one half of ...
    WordNet, bilingual resources, term alignment, parallel lists
    ... number of literals was found in the remaining 507 (3%) synsets. For the 11,091 synsets with same number of literals in English and Serbian the distribution according to the number of literals was as follows: there were 7063 (64%) synsets with one literal, 3288 (30%) with two, 561 (5%) with tree, and ...

  • Integrative GHG Assessment in Oil and Gas Industry

    Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa (2023)
    Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...
    energetska tranzicija, gasovi staklene baste, industrija, nafta i gas
    ... n and exploitation of energy sources, conversion of primary cnergy sources into usable forms in refineries and power plants, transmission and distribution of fucls, and the use of fuels in stationary and mobile applications. These activities result in emissions of carbon dioxide (CO») from the ...

  • Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria

    Vladimir Krivošić, Luka Crnogorac, Rade Tokalić (2024)
    The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...
    utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijuma

  • Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma

    Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković (2013)
    ... classified as microcarcinoma. All relevant clinical information including diagnosis at pre- sentation, histological reports from the initial surgery (size, type of the tumor), and cause of death were extracted from medical records. Study end points included date of last follow-up and date of death. ORIGINAL ...

  • Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes

    Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić (2011)
    Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...
    Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
    ... rate of the substitution. The reactivity of pyridine is almost the sameas that for DMSO. Here we have a competition between the type of donor atom and size of the entering ligand. The reactivity of the studied complexes toward selected nucle- ophiles is determined from the data of the rate constants (Table ...

  • Vebran Web Services for Corpus Query Expansion

    Ranka Stanković, Miloš Utvić (2020)
    U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.
    corpus search, web service, Serbian lexical resources, query expansion
    ... extraction of terms and other tasks in the field of knowledge engineering (Утвић et al., 2018). The RudKor contains 344 different texts with a total size of 5.4 million words. Infotheca Vol. 19, No. 2, December 2019 101 Stanković R. and Utvić M., “Vebran Web Service . . . ”, pp. 99–118 Mining ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... solutions being roughly Grs45–58Adr40–52Alm2-3 (grain 1: 20 KOSTIĆ, SREĆKOVIĆ-BATOĆANIN, FILIPOV, TANČIĆ and SOKOL GEOLOGICA CARPATHICA, 2021, 72, 1, 17–25 (Ca2.949Fe2+ 0.051Mn0.000)3.000 (Al1.198Fe3+ 0.802Cr0.000Ti0.000)2.000 (Si2.991Al0.009)3.000 and grain 2: (Ca2.909Fe2+ 0.091Mn0.000)3.000 (Al0 ...
    ... 961Fe3+ 1.038Cr0.001Ti0.000)2.000 (Si3.012Al0.000)3.012) in the core and Adr70–97Grs2–29)Sps1 (grain 1: (Ca2.991Fe2+ 0.000Mn0.018)3.009 (Al0.588Fe3+ 1.363Cr0.000Ti0.041)1.991 (Si2.962Al0.038)3.000 and grain 2: (Ca2.968Fe2+ 0.011Mn0.021)3.000 (Al0.060Fe3+ 1.926Cr0.002Ti0.012)2.000 (Si3.015Al0.000)3 ...
    ... the angle of zonation margin to the imaged Fig. 4. BSE image of garnet grains with positions analyzed of EMPA and LA-ICP-MS methods. SN-310 Grain 1 Grain 2 c. 1 r. 1 c. 2 r. 2 CaO 35.61 34.51 33.98 34.06 MnO n.d. 0.26 n.d. 0.31 FeO 13.20 20.14 16.91 28.48 Al2O3 13.25 6.56 10.08 0.47 SiO2 38.70 ...

  • Petrološke karakteristike dunavskog šljunka (Beograd – Zemun)

    Miloš Mihajlović (2024)
    Dunavski šljunak u okolini Zemuna karakterističan je za obalne rečne naslage formirane dugotrajnim procesima erozije i transporta materijala koje reka Dunav nosi sa različitih područja uzvodno. Ispitivanja šljunka sa lokacije „Gemax” su pokazala je šljunak uglavnom zaobljen, najčešće u rasponu od nekoliko milimetara do nekoliko centimetara u prečniku. Kako Dunav nosi materijal sa velikog sliva, ovaj šljunak sadrži raznovrsne sastojke sa dominacijom kvarca i odlomaka stena visokosilicijskog sastava. Mineraloško-petrografska ispitivanja pokazala su prisustvo klasta različitog sastava, čime je potvrđena ...
    Dunav, šljunak, mineraloško-petrografska ispitivanja, građevinarstvo
    ... from various upstream areas. Investigations ofthe gravel at the "Gemax" site have shown that the gravel is mostly rounded, typically ranging in size from a few millimeters to several centimeters in diameter. As the Danube carries material from a large catchment area, this gravel contains a variety ...

  • P-T analiza RMU Bitola – krupne klase

    Nemanja Dobrosavljević (2024)
    Cilj ovog diplomskog rada je bio ispitivanje mogućnosti i tehnologije čišćenjauglja, kao i predstaviti rezultate pliva – tone analize koja ima za cilj ocenu mogućnosti čišćenja uglja - krupnih klasa posmatranog uzorka. Da bi se ispitivanje i analiza mogućnosti čišćenja rovnog uglja u REK Bitola uspešno priveli kraju, moralo se uraditi uzorkovanje reprezentativnog uzorka iz koga se potom izdvaja prvi deo koji služi za određivanje sadržaja vlage. Pored tog dela iz uzorka se izdvaja i drugi njegov deo koji će ...
    ugalj, lignit, Bitola, PT analiza, pliva-tone analiza, čišćenje uglja, suvi ugalj, vlažan ugalj, pepeo, donja toplotna moć, čist ugalj, jalovina, bilans
    ... 60; 31.5; 16; 5; 0.5; 0.25; 0.125 and 0.00 mm. After measuring the size classes, the results are shown in tabular and graphical form. In the special part of the diploma thesis, the results of the swim-ton analysis of the size class -60 + 5 mm are presented. The test was carried out using thc ...

  • 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 ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... Numerical simulation of temperature and pressure distribution in producing gas well, World journal of modelling and simulation, Vol. 4, str 94-103, (2008) [45] O. Cazares-Candia, M. Vasquez-Cruz, Prediction of pressure, temperature, and velocity distribution of two-phase flow in oil wells, Journal of ...
    ... hemijsko inžinjerstvo, Univerzitet Oxford, str 1-95, (1987) [86] W. Ambrosini, P. Andreussi, J. Azzopardi, A physically based correlation for drop size in annular flow, International Journal of Multiphase Flow, Vol. 17, str 497- 507, (1991) [87] P. Roumazeilles, J. Yang, X. Chen, J. Wilson, J. Brill ...
    ... Robinson, A new two-constant equation of state, Idustrial & Engineering Chemistry Fundamentals, Vol. 15, str 56-64, (1976) [36] T. Boldizsar, The distribution of temperature in flowing wells, Americal Journal of science, Vol. 256, str 294-298, (1958) [37] R. Sagar, D. Doty, Z. Schmidt, Predicting ...

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... site, are protected. 2. Soil Oscillation Law To establish the correlation between the oscillation velocity and three basic parameters affecting its size, the explosive quantity, properties of rock material, and the distance, several mathematical models have been developed. One of the most frequently ...

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities

    Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov (2024)
    Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...
    полилексемске језинице, именовани ентитет, вишезначност значења речи, складиште смисла, LLOD