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Упит dcterms_subject_txt:chemical composition

312 items

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Arhitektonsko-građevinski kamen Crne Gore, stanje i potencijali

    Darko Božović, Vladimir Simić (2023)
    arhitektonsko-građevinski kamen, rezerve, kvalitet, potencijalnost

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... applied in data processing. The uneven distribution of sampling sites (155 groundwater samples) had an impact on determining the origin of the chemical composition of groundwater, wherein the grouping of the occurrences from a hydrogeological point of view, represented an important method in the research ...
    ... ArcGIS. A detailed analysis of the physicochemical properties of groundwater defined the basic processes, which affected the formation of the chemical composition of groundwater. The methodology of statistical analysis was applied to determine the parameters which impact the distribution of naturally ...
    ... Congress, Karst hydrogeology and karst environment protection. Guilin, China. pp. 369 – 373. 169 88. Krešić N, Papić P. 1990. Specific chemical composition of karst groundwater in the Ophiolite Belt of the Yugoslav Inner Dinarides: A case for covered karst. Environ. Geol. 15: 131 – 135. 89 ...

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Production of morphological dictionaries of multi-word units using a multipurpose tool

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... we realized that the answers obtained automatically in support of manual production of MWU lemmas can also help in detection of the syntactic composition of a MWU and therefore indicate the appropriate inflectional transducer. Namely, the MWUs in Serbian have predictable basic structures. For instance ...

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • Stepen metamorfizma metaklastita rudnika

    Vanja Ćuk (2024)
    Zadatak ovog rada je bio, potvrda saznanja da se na planini Rudnik dogodio kontaktni metamorfizam gornjokrednih sedimentnih stena i da se ispita intenzitet kontakto-metamorfnih promena. Posle kraćeg opisa geografskog položaja, pregleda ranijih istraživanja i geologije šireg područja, usmerena je pažnja na petrološka ispitivanja metaklastita i na kontaktno-metamorfne facije. Usled stvaranja različitih vulkanogenih facija odnosno usled vulkanskih erupcija, delovanjem zagrejane magme (lave) ili zagrejanih fluida, došlo je do kontaktnog metamorfizma, na granici oligocen-miocen i do stvaranja različitih metamorfnih stena, a ...
    Kontaktni metamorfizam, Rudnik, metakonglomerati, metapeščari, metaalveroliti

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... absorption correction using spherical harmonics (implemented in SCALE3 ABSPACK scaling algorithm) were applied. �-K3YbSi2O7 �0-K3YbSi2O7 Crystal data Chemical formula K3O7Si2Yb K3O7Si2Yb Mr 458.52 458.5 Crystal system, space group Hexagonal, P63/mmc Orthorhombic, Cmcm Temperature (K) 298 100 a, b, c (Å) ...
    ... absorption correction using spherical harmonics (implemented in SCALE3 ABSPACK scaling algorithm) were applied. B-K3YbSiO; Crystal data B-K3YbSi,0, Chemical formula K307Sin Yb K307Sin Yb M, 458.52 458.5 Crystal system, space group Hexagonal, P63/mmc Orthorhombic, Cmcm Temperature (K) 298 100 a, b, c ...
    ... reported the first study on the magnetism of the structural family of Na3REESi2O7 compounds (REE = Ho, Yb), which are paramagnetic and similar in composition with respect to the K3YbSi2O7 samples investigated in this contribution. For several REE orthosilicates (REE2SiO5) and REE disilicates (REE2Si2O7) ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... goases ·'· - J @·Ubt iil | |j | Figure 2.5 CO- separation using membrane material. _2 « Feed gas 55"C «~ e • ~ •a 2.4. Chemical Looping Chemical looping can be potentially cost-effective CO--capture options with minimum energy losses, in which both CO- and H»O are inherently separated ...
    ... For pre-combustion CO2 capture, chemical looping can be combined with IGCC to produce syngas as a valuable byproduct. These technologies use a metal oxide as an oxygen carrier to circulate oxygen between the air and fuel reactors. A challenge associated with chemical-looping processes is the high-pressure ...
    ... the chemical-looping technologies considered for the power-generation sector are at the laboratory or concept stage of development with a few pilot-scale studies currently under investigation and it is expected to reach its large-scale deployment in 2030[49]. Figure 2.5 shows a chemical looping ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... on coal properties is essential for reli- able operational mine planning [8]. Generally two types of grade variability exist in the coal chemical composition (fig. 1): – long-term variability as measured by trends of monthly or longer duration, and – operational variability is generally measured ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... evidenced but intervention is not suggested for the investigated areas. Lastly, non-target screening analysis revealed a high div- ersity in chemical composition and a wide spectrum of organic contaminants comprising pharmaceuticals, technical additives, personal care products and pes- ticides. Some ...
    ... different chemical analyses can result in different assessments of the river quality. A * Corresponding author. E-mail: jan.schwarzbauer@emr.rwth-aachen.de # Serbian Chemical Society ...
    ... Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer | Journal of the Serbian Chemical Society | 2014 | | 10.2298/JSC131105014A http://dr.rgf.bg.ac.rs/s/repo/item/0005039 Дигитални репозиторијум Рударско-геолошког факултета Универзитета ...

  • Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)

    Ljiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... t of the separation and storage of CO [3]. Syngas can be used to produce a number of usable products, such as electricity, liquid fuels and chemical raw materials. The competitiveness of these products is changing with the cost of technology, or the level of development of this technology. ...
    ... of the gas generated from the UCG process. It could be utilized as a fuel in thermal power plants (TPP), as well as district heating plants, in chemical industry, in systems for the hydrogen generation, and also for obtaining petroleum products as fuels. In Australia, in the beginning ofthis century ...
    ... In the treatment of wastewater, there is sometimes a need for additional, detailed re- search which should clarify the hydrogeological and hydro-chemical environment immediately in the parts of the terrain where appropriate measures for protection will be built or undertaken (investigative works ...

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... and belongs to Kolubara District. The limestone deposit Nepričava consists of rock masses of sedimentary origin, not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and mechanical ...

  • FrameNet Lexical Database: Presenting a Few Frames Within the Risk Domain

    Aleksandra Marković, Ranka Stanković, Natalija Tomić, Olivera Kitanović (2021)
    U radu se daje kratak prikaz teorije semantike okvira, na kojoj je zasnovana leksička baza Frejmnet. Predstavljena je koncepcija ove mreže, kao i mogućnosti njene primene. Predstavljena je i leksička analiza koja se primenjuje u projektu izrade Frejmneta i ukazano na razlike između analize zasnovane na okviru u odnosu na analizu zasnovanu na reči. Zatim je prikazano nekoliko povezanih okvira koje prizivaju reči iz domena rizika. U radu je predstavljena i platforma NLTК pomoću koje se mogu koristiti ...
    Srpski jezik, semantika okvira, FrameNet, scenario rizika, rudarski korpus, obrada prirodnog jezika
    ... added to the frames (in the case of Being_at_risk, the LU risk would be added). This is followed by the information on word class, meaning, formal composition (whether it is a single word or a multi- word expression), after which instructions are given on how the corpus 12 can be searched in order to extract ...

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... J., Kutty, T.R.N. (2000): Preparation of manganite perovskites by a wet- chemical method involving a redox reaction and their characterisation, Materials Chemistry and Physics, 63, 218-225. Rao, C. N. R. (1994): Chemical Approaches to the Synthesis of Inorganic Materials, Wiley Eastern Ltd., New ...
    ... Electric transport and ferromagnetic properties. Can. J. Phys. 48, 2023-2031. Segal, D. (1989): Chemical Synthesis of Advanced CeramicMaterials, Cambridge Univ. Press, Cambridge Segal, D. (1997): Chemical synthesis of ceramic material, J Mater Chem, 7, 1297–1305. Shannon, R.D. (1976): Revised effective ...
    ... Милена Росић 119 Ozin, G.A., Arsenault, A.C. (2005): Nanochemistry: A Chemical Approach to Nanomaterials, Royal Society of Chemistry, London Patil, K.C., Aruna, S.T., Ekambaram, S. (1997): Combustion synthesis, Curr Opin ...

  • Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike

    Мирослав Црногорац, Душан Даниловић, Лола Томић (2020)
    ... economic and ecological point of view, as well as in terms of preserving of the components of the chemical composition. Key words: goji berries, Macedonian solar dryer, quality and nutritional composition UVOD Voćka godži (Lycium barbarum) raste kao žbun, a njeni plodovi su u obliku bobica, crvene boje ...
    ... Artemisia, isparljiva organska jedinjenja, hidrodestilacija, GC/MS Abstract: The aim of this study was to investigate the difference in chemical composition, yield and physical properties of essential oils in five Artemisia species: A. annua, A. absinthium, A. abrotanum, A. dracunculus and A. ...
    ... the spectra from Adams and Nist spectral database and we identified between 64 and 99% volatile organic compounds present in samples. The chemical composition of an oil is conditioned its medical effects and use in different industries, therefore, these determinations are of great importance. Keyword: ...

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... concerned, there is a highly developed suffixial word formation. With verbs, prefixation is also well developed (mainly related to aspectual meanings). Composition, on the whole, is less developed. Calques and coinages, as well as so-called exocen- tric noun compounds, are frowned upon by language purists, ...
    ... sko (squaw), or the adjectives fer (fair) or braon (brown). Well developed word formation (suffixation, prefixa- tion, and, to a lesser extent, composition and various combined word formation processes) results in the fact that the majority of lexemes can be grouped into word families, and nested entries ...
    ... morphology of Serbian. ey also form word fam- ilies according to Serbian word formation rules. 3.2.3 Lexis, phraseology, terminology, onomastics e composition of the vocabulary reflects, on the one hand, the fact that it is based on the Štokavian di- alect, not only with regard to the original inventory ...