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Упит dcterms_subject_txt:Otoliti in situ

1961 items

  • Application of ERT in the study of debris-flow source area: Case study Selanac debris flow

    Dragana Đurić, Jelka Krušić, Biljana Abolmasov (2021)

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... Okoška Gorais a high-grade and highly localized Zn-Pb-Cu exploration target: in the southern part ofthe Pohorje Mountains between the towns ofOplotnica andSlo Bistrica. Three exploration shafts were dug at the mineralization site, one of which accessible today. The тат оге пипегај5 аге ругне, зрћајегне ...
    ... inclusions in sphalerite and quartz from five samples of ore were investigated in this study. Both types of quartz form well-developed euhedral c whereas sphalerite forms euhedralcrystals or fills the open spaces between pre-existi and gangue minerals. Sphalerite is honey yellow or dark brown in color and ...
    ... ofthe crystal shape. Inclusions in both assemblages are generally two-phase, rarely iree-phase, the latter containing unknown transparent solids, which are probably not salt rystals. Two types of inclusion assemblages have been identified in sphalerite (Fig. 1). nclusions in the first assemblage (S2) occur ...

  • Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia

    Fen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Konzervacija miocenskih kičmenjaka sa lokaliteta Riđake (severozapadna Srbija) iz zbirke Prirodnjačkog muzeja u Beogradu

    Nenad Mladenović (2024)
    U radu je opisana geološka građa terena i metode koje se koriste u paleontologiji za izdvajanje, konzervaciju i restauraciju fosilnog materijala sa lokaliteta Riđake kod Šapca. Prikazana je anatomija fosilnih kičmenjaka. U prosejanom sedimentnom materijalu težine od 4kg pronađeno je 10,798 kostiju, uključujući ostatke Pisces (riba) Amphibia (vodozemaca), Reptilia (gmizavaca), Aves (ptica) i Mammalia (sisara).
    geološka građa, konzervacija, restauracija, Riđake, fosili kičmenjaka
    ... konstruisanih vibro-sita (Slika 15). Agregat za proizvodnju naizmenične struje (220V/50Hz) omogućava rad motora sita ı potopne pumpe na nalazištu, čime se uslovi rada približavaju laboratorijskim. Sito ima otvore veličine 0,7 i 2,0 milimetara. 25 Slika 15 - PFibro sito u radionici Prirodnjačkog ...
    ... fosila, pri čemu se koriste ručni alati kao što su zubarske igle, četke, čekići, dleta, šila, pinceta, turpija, kao ı različite mašine poput: vibro sita, mašina za sečenje i glačanje, vazdušni čekići, električni graviri, mašina za abrazivno struganje i rotaciona brusilica (Slika 3) (Spajić i dr. ...
    ... organski ostaci se koncentrišu na površini. Nakon 24 sata, uzorci se uklanjaju za paleobotaničku analizu ı peru Jakim mlazom vode. Korišćenje vibro-sita ubrzava proces separacije, smanjujući vreme proseJavanje sedimenta na jednu trećinu. Broj prosejanih uzoraka zavisi od količine obrađenog sedimenta ...

  • Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction

    Velislava Stoykova, Ranka Stanković (2018)

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine

    Dragan Živković (2024)
    Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...
    DInSAR, Istočno anatolijski rased, Kahramanmaraški trostruki spoj

  • 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 ...
    Sphene, Phase transition, Raman spectroscopy, X-ray diffraction, SEM, IR

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    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 ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... Monitoring in situ Biodegresation and Retardation of Aromatic Hydrocarbons, Ground Water, Vol. 33, No. 3, 469-475, 1995, http://dx.doi.org/10.1111/j.1745-6584.1995.tb00303.x 26. Babac, D., Study on the Analysis of the Local Water Resources of the Deep Aquifer of the “Šumice” Water Source in Kikinda ...
    ... significant issue in every society. It is of vital importance to control and monitor the operation of each water source. Unfortunately, there are many problems. Even when the required legislation is in place, it is sometimes impossible to implement it in practice, not only in the case of existing ...
    ... wells (Figure 2) have been drilled in the study area [18]. According to the type of porosity and hydrodynamic characteristics, there are two types of aquifers in this region: confined and unconfined, both in Quaternary sands. The unconfined aquifer was formed in Quaternary alluvial sands. The depth ...

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)
    ... Geophysical Survey in Archaeo- logical Field Evaluation, London: 1-60. Dalan, R. A., Bevan, B. W., Goodman, G., Lynch, D., De Vore, S., Adamek, S., Martin,T., Holley, G., Michlo- vic, M. 2001. The Measurement and Analysis of Depth in Archaeological Geophysics: Tests at the Biesterfeldt Site, USA. Archaeological ...
    ... Archaeological Prospection 6, 2: 85-105. Diamanti, N. G., Tsokas, G. N., Tsour- los, P. I., Vafid, A. 2005. Integrated in- terpretation of geophysical data in the archaeological site of Europos (nort- hern Greece). Archaeological Prospection 12, 2: 79-91. Dittrich, D., Koppelt, U. 1998. Quan- titative ...
    ... 4: 255- 268. Gaffney, G. 2008. Detecting trends in the prediction of the buried past: A review of geophysical techniques in ar- cheology. Archaeometry 50, 2: 313-336. Gaffney, C., Gater, J., Ovenden, S. 2002. Тhe use of geophysical tech- niques in archaeological evaluations. Technical Paper No 6 ...

  • Keyword Extraction from Parallel Abstracts of Scientific Publications

    Slobodan Beliga, Olivera Kitanović, Ranka Stanković, Sanda Martinčić-Ipšić (2017)
    ... proces donošienje konačan odluka Text: estim of the qualiti of built-in concret by the ultrasound observ. thi paper present result of the propag veloc investig of ultrasound wave in the concret construct so call non-destruct method in situ due to inspect of concret qualiti that is inbuilt into the bodi of ...
    ... keyword extraction on parallel texts written in two languages. In addition, in this work we test whether the SBKE method is portable to a new language, in this research Serbian (in addition to Croatian and English [8]), to a new domain of geology and mining (in addition to domains of news and technical ...
    ... usually define keywords in their lemmatized form, while in the Serbian texts (and rarely in English) they appear in many inflected forms, which are different from lemma. Bilingual Serbian-English KE dataset introduced in this paper is publicly available from http://langnet.uniri. hr/resources.html. The ...

  • Middle Miocene otoliths of freshwater fishes from the Vracevic Lake (Serbian Lake System)

    Katarina Bradić-Milinović, Ljupko Rundić, Werner Schwarzhans (2021)
    средњи миоцен, отолити, Врачевић, Ваљевско-mионички басен, Српски језерски систем

  • 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.

  • 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
    ... very often not economically attractive, companics in these situations tend to combust the produced gas on the production site directly. This process lcads to significant emissions of CH+, and CO». Aside rom intentional flaring at the production site, the flaring process can take place during hydrocarbon ...
    ... scaled to Methanc content in the facility-associated gas composition before bcing applied. Additionally, CO>» can also be released from fugitive sources if CO, is present in the gas stream. In this case, the Methane emission factor is scaled based on CO» content in thc gas stream. 4ctuall CHa ...
    ... 70000 ! - In recent years, thc accurate estimate and reporting of GHG emissions has becomc increasingly important in the O&G industry. This is due in part to growing concerns over climate change and thce nced to mitigate its effects. As a result, O&G companies are investing more cffort in improving ...

  • Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites

    Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)
    To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...
    Perovskite/spinel ceramics, Multiferroic, Sintering, Influence of synthesis method

  • Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi

    Anđela Despotov (2024)
    U radu je opisano ponašanje mekih stenskih masa koje su izložene porecesu raspadanja tokom određenog vremenskog perioda. Meke stenske predstavljaju kritične vrste stenskih masa pošto izazivaju različite probleme tokom izvođenja građevinskih radova. Meke stene mogu biti sedimentne stene, raspadnute metamorfne i magmatske stene. Odlikuju se niskim vrednostima čvrstoće, visokom deformabilnošću, visokom plastičnošću, podložne su dezintegraciji i fizičko-hemijskom raspadanju, odnosno ubrzanom dejstvu površinskog raspadanja usled atmosferskih uticaja.Za klasifikaciju mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan ...
    meke stenske mase, dezintegracija, klasifikacioni sistemi, Slake durability test
    ... vr ši ne um er en o iz me nj en e po vr ši ne ST AN JE ZI DO VA PU KO TI NA STRUKTURA DNTAKTNAILIMASIVNA- ikakna ili masivna in situ stenska vmasa sa retkam: diskontinutetana na velikom rastojanja FOO BLOKOVSKIIZDELJENA . veoma OI dobro uzglobljena neoštećena stanska | wasakoja ...
    ... gde se svaka zona smatra homogenom u odnosu na raspadnutost i sisteme diskontinuiteta. Zatim se u svakoj od ovih zona može izvesti određeni broj in situ opita. Takođe je važno izvršiti laboratorijska ispitivanja kako za deformabilnost i čvrstoću ovih vrsta stena, tako i za primenu empirijskih sistema ...
    ... čega se meri. Isti proces se ponavlja i za drugi ciklus opita. Na kraju opita uzorak se fotografiše i izvrši se opis materijala koji je ostao na situ. Prilikom opisa, potrebno je razlikovati tri kategorije prema američkom standardu ASTM D 4644 (2008): I - uzorak ostaje praktično nepromenjen ...

  • Izdvajanje vode iz prirodnog gasa

    Dejan Nedeljkov (2024)
    U radu je istaknuto važnost prirodnog gasa kao vitalna komponenta svetske energetike.Spada u najsigurnije,najčistije i najkorisnije fosilno gorivo. Sama pojava vode u vidu vlage u gasu je pokazatelj lošeg kvaliteta gasa. parametri koji mogu dovesti do lošeg kvaliteta prirodnog gasa kao pokazatelj je Wobbe index.U okviru istraživanja u master radu glavni problem funkcionisanja na KPG Paliću predstavlja vlaga u gasu,takođe se može zaključiti da kvalitet gasa zavisi od Wobbe indeksa odnosno, što je Wobbe veći, čistiji je gas, ili ...
    prirodni gas, separatori, separacija, grejači, čileri, tačka rose, Wobbe indeks
    ... molekularna sita. Unutar pora postoji veliki broj lokalnih aktivnih zona (polarizovanih površina). Polarni molekuli H-S i vode kada stupe u pore grade slabe jonske veze sa aktivnim zonama. Nepolarni molekuli kao parafinski ugljovodonici neće se vezivati sa aktivnim zonama. Tako molekulska sita dobro ...
    ... korišćenja molekularnih sita u procesu dehidracije i izdvajanja H:-JS.Mada CO- nije polaran i ne vezuje se sa aktivnim zonama u porama, ulaskom u pore male količine CO- bivaju zarobljene, čime one sprečavaju pristup HoS i vode aktivnim zonama i smanjuju efikasnost molekulskih sita. Procesi adsorpcije ...
    ... daljeg procesa može se obaviti dehidracija gasa do tražene tačke rosišta na vodi putem apsorpcije (trietilen glikol) ili adsorpcije (molekularna sita).Medjutim,najčešću promenu za razrešavanje ove vrste problema nalazi injektiranje glikola u gas po izlazu gasa iz odvajača slobodne vode. Najčešće ...

  • Primena ubrzane konsolidacije kod izgradnje nasipa na deonici priključka Novi Beograd – Surčin autoputa ,,Miloš Veliki"

    Aleksa Tomičić (2024)
    Problem koji se javlja prilikom izgradnje objekata na ne konsolidovanom stišljivom tlu jeste pre svega vezan za prevelika sleganja tla usled opterećenja od objekata, najčešće su to objekti putne infrastrukture (nasipi), ili stambeno poslovni objekti. U tu svrhu se,primenjuju različiti vidovi ubrzanja konsolidacije tla. Stoga za potrebe izrade završnog rada Master akademskih studija studijskog programa geotehnika, na Rudarsko-geološkom fakultetu, izvršena je analiza dva najčešće korišćena postupka ubrzanja konsolidacije: predopterećenjem i ugradnjom peščanih drenova. Glavni cilj ovih postupaka je ...
    stišljivo tlo, konsolidacija, ubrzanje konsolidacije, predopterećenje, peščani drenovi

  • Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia

    Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić (2022)
    The paper compares the flow regimes of the Resava River at the gauging stations of the Manasija Monastery (upper course) and the town of Svilajnac (lower course). The hydrological analysis encompasses a multiyear period of monitoring (1982–2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km2) and the Manasija Monastery station (358k m2), considering the overall monitoring period and characteristic years. The results indicate that the specific runoff in ...
    hydrogeological characteristics, water regime, water balance, karst aquifer, Resava catchment area
    ... indices (BFI). In the select- ed years, the BFI at the Manasija Monastery was 3 to 9% higher, suggesting that the karst massif had considerable dynamic reserves, which recharged the Resava River during dry periods. The year 2001 was an exception, whcn the situation was the oppo- site. Namely, the ...
    ... karst. The same applies to dry years but in that case the specific runoff in the upper catchment ofthe Re- sava River is twice the specific runoff in the entire catchment in the same dry ycar, or the arca covcred by the gauging station at Svilajnac. However, in wet years the situation is opposite. ...
    ... types of aquifers in the study arca. https://bgd.bg/review-bgs 1. Intergranular aquifers in the central and western parts of thc study area, formed in Quater- nary and Ncogene sediments. Thcy are recharged by infiltration of precipitation, water from surface strecams, and in part by karst aquifer ...