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Упит dcterms_subject_txt:Gas Hydrate Formation

343 items

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    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 method
    ... 40–76. VASSILEV, S., BAXTER, D. & VASSILEV, C. (2014): An overview of the behaviour of biomass during combustion: Part II. Ash fusion and ash formation mechanisms of biomass types.– Fuel, 117, 152–183. VASSILEV, S., MENENDEZ, R., ALVAREZ, D., DIAZ-SOMOANO, M. & MARTI- NEZ-TARAZONA, R. (2003): P ...

  • High-resolution sequence stratigraphy of carbonates - theory and examples

    Jelena Stefanović, Dejan Radivojević (2020)
    Циљ рада је да кроз теоријски аспект и примере примене представи секвенциону стратиграфију високе резолуције карбонатних седимената. У том смислу први део се односи на појам и значење високе резолуције у секвенционој стратиграфији. Од временских и просторних скала које одговарају сеизмичким профилима у последњих двадесет година метода је нашла примену на скалама које одговарају бушотинским подацима или изданцима. Као најпогоднији седименти за овај тип истраживања су се показали карбонати јер су осетљиви на еустатичке промене, а основе секвенционе стратиграфије ...
    изданак, системска група, јура-креда, карбонатна платформа, плитководна средина
    ... BELKHEDIM, S., JAROCHOWSKA, E., BENHAMOU, M., NEMRA, A., RADOUANE, S. & MUNNECKE, A. 2019. Interplay of Autogenic and Allogenic Processes On the Formation of Shallow Carbonate Cycles in a Synrift Setting (Lower Pliensbachian, Traras Mountains, NW Algeria). Journal of Sedimentary Research. 89. pp ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... higher after activation with NaOH and KOH in comparison with samples obtained by activation with LiOH. That may be explained as a consequence of the formation of crystal layers after activation which are reach with carbonates and oxides, whereby this phenomenon is the most pronounced for fructose and LiOH ...
    ... also confirmed by XRPD and Raman spectrometry and is described in Section 3.1.1. Variation in oxygen and hydrogen contents may be explained with formation of the oxides and releasing of the water molecules during activation reactions or due to carbonization as well as decomposition of oxygen-containing ...
    ... Activated carbons obtained by this procedure were designated as AC@G–T–N2–t–XOH and AC@F–T–N2–t–XOH, where G and F are precursors, N2 is activation gas, T and t are temperature and time of activation while XOH represent activation agents (X = Li, Na, K). During activations the following yields were obtained: ...

  • Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)

    Gordana M. Jovanović (2014-12-05)
    Rad obuhvata detaljnu studiju badenskih školjaka koje potiču sa terenajugoistočnog oboda Panonskog basena (Centralni Paratetis). Proučavani su lokaliteti naprostorima Srbije (Fruška gora, Golubac, okolina Beograda, Aranđelovca, Koceljeva,Loznica) i severoistočne Bosne (Ugljevik). Pored taksonomske analize i paleontološkihopisa bivalvija, u radu je dat i spisak revidovanih vrsta koje su do sada pronađene usedimentima badenskog kata istraživanog terena. Do sada je ukupno poznato 41familija, 108 rodova i 174 taksona. Identifikovano je 170 bivalvijskih vrsta, međukojima su neke prvi put konstatovane na ovim ...
    školjke, baden, Panonski basen (Centralni Paratetis), stratigrafija,paleoekologija, paleogeografija, paleobiogeografija
    ... Ćorić, S. i Rögl F. 2004: Roggendorf-1 borehole, a key-section for Lower Badenian transgressions and the stratigraphic position of the Grund Formation (Molasse Basin, Lower Austria). Geologica Carpathica 55, 2: 165-178. Ćorić, S., Harzhauser, M., Hohenegger, J., Mandic, O., Pervesler, P., Roetzer ...
    ... Rögl, F., Schloger, R., Spezzaferri, S., Stingl, K., Švabenická, L., Zorn, I. i Zuschin, M. 2004: Stratigraphy and correlation of the Grund formation in the Molasse Basin, Northeastern Austria (Middle Miocene, Lower Badenian). Geologica Carpathica, 55: 207-215. Ćorić, S., Pavelić D., Rögl ...
    ... Palaeoclimatology, Palaeoecology, 183: 103-133. Harzhauser, M., i Mandic, O. 2003. Molluscs from the Badenian (Middle Miocene) of the Gaindorf Formation (Alpine Molasse Basin, NE Austria.– Taxonomy, Paleoecology and Biostratigraphy. Annales Naturhistorische Museum Wien A, 104: 85-127. Harzhauser ...

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет
    ... 2010: Primena savremenih metoda u upravljanju procesom proizvodnje nafte i gasa. RGF, 164 str. Др НЕВЕНКА ЂЕРИЋ, ванредни професор DJERIĆ N., GERZINA N., SCHMID M.S., 2007: Age of the Juarassic radiolarian chert formation from the Zlatar Mountain (SW Serbia). Ofioliti, 32 (2), 101–108. VISHNEVSKAYA ...
    ... му је из области производње нафте и гаса, припреме нафте и гаса и транспорта нафте и гаса. Члан је комисије за стандарде из области Рудраство - Нафтно рудар- ство KS B082/PKS B067. Члан је Националног нафтног ко- митета Србије и Стручног удружења за гас и гасну технику. 3. НАСТАВНИЦИ И САРАДНИЦИ ...
    ... пројектовање и вођење припреме нафте, гаса, вода и геотермалних енергената; пројектовање и управљање техничко-тех- нолошким процесом цевоводног транспорта нафте, гаса, вода и геотермалних енергената; пројектовање и управљање системима за дистрибуцију природног гаса; пројектовање мерно-регулационих станица; ...

  • The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments

    Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)
    The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...
    sediments, Tisza River, organic matter, biomarkers, oil pollutants
    ... Petroleum Formation and Occurrence, 2nd Ed., Springer-Ver- lag, Heidelberg, Germany, 1984, pp. 57, 424 3. B. Jovančićević, M. Vrvić, J. Schwarzbauer, H. Wehner, G. Scheeder, D. Vitorović, Water Air Soil Pollut. 183 (2007) 225 4. V. Beškoski, G. Gojgić-Cvijović, B. Jovančićević, M. Vrvić, Gas Chromatograph ...
    ... and methanol (1:1 volume ratio). The saturated hydrocarbons were analyzed by gas chromatography–mass spectrometry (GC–MS). A gas chromatograph Agilent 7890A GC (H5-MS capillary column, 30 m×0.25 mm, He carrier gas 1.5 cm3 min-1, FID) coupled to an Agilent 5975C mass selective detector (70 eV) ...
    ... Chromatograph in Environmental Sciences and Evaluation of Bioremediation, in Gas Chromatography – Biochemicals, Narcotics and Essential Oils, B. Salih, Ö. Çelikbıçak, Eds., InTech, Rijeka, Croatia, 2012, Ch. 1, p. 3 5. R. A. Bourbonniere, P. A. Meyers, Limnol. Oceanogr. 41 (1996) 352 6. A. Bechtel ...

  • 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
    ... Externally developed Dictionary of library and information sciences10 encompasses the terminology of theory and practice of librarianship and in- formation sciences and a wide range of close or related fields, in Serbian, English and German languages. The languages in this dictionary have equal status ...

  • Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian

    Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić (2020)
    The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...
    Part-of-Speech tagging, lemmatization, corpus, evaluation, Serbian, morphological dictionary
    ... in mind its size, it had to be done automatically using morphological dictionaries introduced in Section 2.1. In the first step unambiguous in- formation was added, while in the second step we tried to resolve ambiguities through several heuristic rules, includ- ing frequencies from texts that were ...

  • Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++

    Branislava Šandrih, Ranka Stanković (2020)
    U nauci, industriji i mnogim istraživačkim oblastima, terminologija se brzo razvija. Najčešće, jezik koji je „lingua franca“ za većinu ovih oblasti je engleski. Kao posledica toga, za mnoga polja termini domena su koncipirani na engleskom, a kasnije se prevode na druge jezike. U ovom radu predstavljamo pristup za automatsko izdvajanje dvojezične terminologije za englesko-srpski jezički par koji se oslanja na usaglašeni dvojezični korpus domena, ekstraktor terminologije za ciljni jezik i alat za usklađivanje delova. Ispitujemo performanse metode na domenu ...
    ekstrakcija terminologije, validacija terminologije, GIZA++, grafovi, Unitex, klasifikacija teksta
    ... a termi- nology extractor for a target language and a tool for chunk alignment. We examine the per- formance of the method on a Library and In- formation Science domain. The obtained re- sults, as well as the application that imple- ments the method, are available on-line. KEYWORDS: terminology extraction ...

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations

  • 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.

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... slightly increases with the share of cement in the mixture, a second phase was not observed. It can be said that there are the beginnings of the formation of new products due to the presence of weak and poorly defined peaks at low angles (Fig. 6a, 6b, 6c). Figure 6 The X-ray diagram of the sample ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... determiner is to the term, the more its value affects the value of the term. 70 Infotheca Vol. 17, No. 1, 2017 Scientific paper For the database formation to be successful and its final outcome satis- factory, three prerequisites should be met: – collected corpus must be organized in a certain way; ...

  • 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 ...
    kinematika, termohronologija, ekstenzioni detačmenti, Dinaridi, Karpato-Balkanidi
    ... presentation of fission track data. Comput Geosci-Uk 28, 3-12. Đeric, N., Gerzina, N., Schmid, S.M., 2007. Age of the Jurassic Radiolarian Chert Formation from the Zlatar Mountain (SW Serbia). Ofioliti 32, 101-108. Erak, D., Matenco, L., Toljić, M., Stojadinović, U., Andriessen, P.A.M., Willingshofer ...
    ... [Ph.D. thesis]: Vrije Universiteit, Amsterdam, The Netherlands, 192 p. Fügenschuh, B., Schmid, S.M., 2005. Age and significance of core complex formation in a very curved orogen: Evidence from fission track studies in the South Carpathians (Romania). Tectonophyiscs 404, 33-53. Galbraith, R.F. ...
    ... evolucija kontakta Dinarida i Karpato-balkanida u području Jastrepca 145 Horváth, F., Bada, G., Szafian, P., Tari, G., Adam, A., Cloetingh, S., 2006. Formation and deformation of the Pannonian Basin: constraints from opservational data. Geological Society, London, Memoirs 32, 191-206. Horváth, F., Musitz ...

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • Remedijacija otpadnih voda Rudnika prirodnim zeolitom

    Igor Veličković (2024)
    U radu je razmatrano prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeolitskim tufom sa planine Jastrebac. Prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeoliskim tufom sa obronaka planine Jastrebac pokazala se veoma efikasnom. Naime, u tri otpadne flotacijske vode utvrđen je povišen sadržaj arsena, hroma, gvožđa, mangana, kao i nikla. Jednostavnim tretmanom zeolitskim tufom iz ovih voda uklonjeni su svi ovi elementi. Sadržaji gvožđe i mangana su sniženi od 95 do 99 %, dok su ...
    flotation waste water, zeolite tuff, purification
    ... materijala povišene termostabilnosti, doktorska disertacija, Univerzitet u Beogradu, 174. Marantos, 1., Christidis, G.E., Ulmanu, M. 2011. Zeolite formation and deposites. Natural Zeolites Handbook, 2011, 19-36. Mumpton, F.A. 1988. Occurrence, Properties and Utilization of Natural Zeolites, D.Kallo ...
    ... su polja njihove primene u ekosistemima: kod odstranjivanja organskog sumpora vezanog za ulja (Benashvili, 1988); kod prečišćavanja vazduha od gasova SO», COx ı azotnih oksida (Galabova & Haralampiev, 1988)]; kod prečišćavanja voda (Vujković et al., 2000); u poljoprivredi (Pond & Mumpton, 1984); ...
    ... ijska svojstva: • intenzivna jJonska razmena i selektivnost; • reverzibilna hidratacija i dehidracija; • izuzetno visok kapacitet apsorpcije gasova; • otpornostna visoke temperature; • Ootpornostna agresivne sredine; Prirodni zeolit-klinoptilolit karakteriše visoka otpornost na toplotu i ...

  • Површинско распадање керсантита из Тешића мајдана у корелацији са начином обраде на примеру малог степеништа (Београдска тврђава)

    Невенка Новаковић (2024)
    Архитектуру Београда на прелазу 19. у 20. век обележила је употреба керсантита из каменолома Тешића мајдана. Kao камен високих декоративних својстава, керсантит је коришћен за јавне споменике, делове или потпуну изградњу објеката (Народна скупштина Србије, Мало степениште, Народни музеј и др.). Како очување споменика културе изискује познавање својстава уграђеног камена, истраживања су обухватила детаљно проучавање петролошких, хемијских и физичких карактеристика керсантита из Тешића мајданa и узорака камена из споменика Мало степениште (студија случаја). Након детаљног мапирања стања керсантита, лабораторијских ...
    керсантит, Мало степениште, споменик културе, архитектонски камен, физичко-хемијско распадање, мапирање, форме распадања, површинска обрада

  • Hydrographic and hydrological characterization of the Vodenička and Rosomačka rivers

    Vesna Ristić Vakanjac, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković (2017)
    The Visočica River rises in Bulgaria, on the Berovo Mountain. Its course in Bulgaria is 16.7 km long. It enters Serbia near the village of Donji Krivodol. Up to the village of Pakleštica, or the beginning of Lake Zavoj, its right-bank tributaries are the Krivodolštica, the Vodenička, the Rosomačka and the Dojkinačka. There are no left-bank tributaries. Among the tributaries, water levels and discharges are gauged only on the Dojkinačka River. The Vodenička had also been gauged but only ...
    hydrographic characteristics, river discharge, the Vodenička River, the Kamenička River
    ... three right-bank tributaries. All five are nameless streamlets. The union of the Jelov Dol and the Studena Bara at 1384 m.a.s.l. results in the formation of the Vodenička River. The length of its course is 11.971 km. After only one kilometer, at Ivkov Vir, it receives a nameless ephemeral stream from ...

  • ‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions

    Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban (2020)
    Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...
    Firing, Glaze, Traditional ceramics, Provenance studies, Augite

  • Granatski amfiboliti Bistrice

    Jovana Opančina (2024)
    Predmet ispitivanja ovog završnog rada su granatski amfiboliti Bistrice. Izvršena su petrografska i hemijska ispitivanja s ciljem da se odredi stepen metamorfizma, protolit ispitivanih stena i P-T uslovi nastanka. Ispitivani granatski amfiboliti geografski pripadaju Prijepolju, tačnije nalaze se na ulasku u Prijepolje, mesto Bistrica. Geološka građa obuhvata uglavnom mezozojske tvorevine među kojima se nalaze sedimentne, magmatske i metamorfne stene. Geološki procesi koji su doveli do stvaranja amfibolita su procesi subdukcije i obdukcije koji su se pretpostavljamo dešavali na većim ...
    granatski amfiboliti, Bistrica, elektronska mikrosonda, polarizacioni mikroskop