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Упит dcterms_subject_txt:chemical analysis

753 items

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... факултета Универзитета у Београду [ДР РГФ] Crystal structure of K3EuSi2O7 | Sabina Kovač, Predrag Dabić, Aleksandar Kremenović | Journal of the Serbian Chemical Society | 2021 | | 10.2298/JSC210218026K http://dr.rgf.bg.ac.rs/s/repo/item/0005033 Дигитални репозиторијум Рударско-геолошког факултета Универзитета ...
    ... MANUSCRIPT This is an early electronic version of an as-received manuscript that has been accepted for publication in the Journal of the Serbian Chemical Society but has not yet been subjected to the editing process and publishing procedure applied by the JSCS Editorial Office. Please cite ...
    ... 11 stated the existence of this phase, however, they reported only unit cell parameters (a = 9.98(1), c = 14.44(2) Å), space group (P63/mcm), chemical composition and described the morphology of crystals. Myers16 outlined the successful synthesis of K3REESi2O7 (REE = Eu, Y, Sc), but without any ...

  • Energetska bezbednost sektora prirodnog gasa Srbije

    Aleksandar Madžarević, Predrag Jovančić, Miroslav Crnogorac (2023)
    U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gasom domaćeg tržišta bio je jedan od prioriteta razvoja energetike Srbije. Istovremeno, aspekt sigurnog snabdevanja bio je neizostavni deo slagalice stvaranja energetske bezbednosti. Izražena uvozna zavisnost je dominantna karakteristika sektora prirodnog gasa, tačnije, Republika Srbija je snažno zavisna od ruskog gasa, sa više od 80% uvezenih količina gasa, a do pre dve godine snabdevala se isključivo kroz jednu interkonekciju. U radu se razmatra aktuelna situacija u sektoru prirodnog ...
    N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja
    ... security of natural gas supply to Serbia, as well as its vulnerability to interruptions in international supply chains. Through the paper, an analysis of the energy security of the natural gas sector assessed by the N-1 index, IDUPS and the parameter of infrastructure development of the sector ...

  • 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

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји
    ... research procedure comprised of two main parts. The first part of the research was related to the paleostress analysis in the research area, while the second one encompassed the analysis of the active stress field in this part of the Balkan peninsula. The research area represents the innermost part ...
    ... determine the paleostress tensors was done in two of these zones – the Kopaonik and the Maljen ones. Analysis of recently active stress field was done in all three seismogenic zones. Analysis of the paleostress fields which were active in this area during the Alpine orogenic cycle, consisted ...
    ... 213 Spang J.H. 1972. Numerical method for dynamic analysis of calcite twin lamellae. Geol. Soc. of America Bull. 183: 467 – 472 Sperner B., Ratschbacher L. 1994. A Turbo Pascal program package for graphical presentation and stress analysis of calcite deformation. Z. Dtsch. Geol. Ges. 145: 414 ...

  • A WordNet Ontology in Improving Searches of Digital Dialect Dictionary

    Miljana Mladenović, Ranka Stanković, Cvetana Krstev (2017)
    In this paper, we present a method for automatic generation of a digital resource, which connects all indirect synonyms of a dialect term to all indirect synonyms of a corresponding term in the standard language, aiming to improve the search of a digital dialect dictionary. The method uses SWRL rules defined in the Serbian WordNet ontology to identify sets of synonymous words. It also uses e-dictionaries to produce correct lemmas in standard language that users usually employ in searches. ...
    ... received a new impulse with the development of many software tools and digital resources for maintaining, enhancement, sharing, visu- alization and analysis of digital dialect dictionaries. This includes: the develop- ment of digital dictionaries of dialects [4], [13], [1], the development of tools for ...
    ... for the management of dialectal dictionaries [10], the software for data visualization and presenting of linguistic dialectal maps [12], [11], the analysis of the geo- graphical distribution of a language and geographical information relevant for linguistic research [9], using of Semantic Web-based techniques ...

  • Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević (2017)
    ... data are obtained from the previously known stratigraphic units (Pannonian and Pontian, sensu Stevanović). Based on litho- and biostratigraphic analysis and measurement of basic structural elements of each units throughout the area, the obtained data were correlated with the results of two earlier ...

  • Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)

    Dejan Radivojević, Ljupko Rundić (2017)
    ... Organic Geochem., 39/1, 118–134. MODELING OF ECOLOGICAL CONDITIONS IN THE EUXIN BASIN IN THE LATE SARMATIAN AND MAEOTIAN BY METHODS OF DIATOM ANALYSIS Eleonora Radionova Russia Geological Institute RAS, Pyzhevskiy per. 7, Moscow, 119017, Russia radionova@ginras.ru Modern diatom associations of ...

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... temperature of 400 °C for 4 h. The biomarker signatures were evaluated using gas chromatography-mass spectrometry and carbon specific isotope analysis (δ13C) of individual n-alkanes in initial bitumen extracted from two immature oil shale samples (D13 and D16) and corresponding LPs obtained by ...

  • 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
    ... (PoS-tagging). PoS-tagging precedes many other Natural Language Processing tasks, such as Text Classi- fication, Named Entity Recognition, Sentiment Analysis, Question Answering, etc. Computer programs that perform this task, the so-called ‘taggers’, can be based on lookup-tables, regular expres- sions ...
    ... Associ- ation for Computational Linguistics: Human Language Technologies, pages 271–281. Constant, M., Krstev, C., and Vitas, D. (2018). Lexical analysis of serbian with conditional random fields and large-coverage finite-state resources. In Zygmunt Vetu- lani, et al., editors, Human Language Technology ...
    ... Language Resources and Evaluation, LREC 2004, May 26-28, 2004, Lisbon, Portugal. Heiden, S. (2010). The txm platform: Building open- source textual analysis software compatible with the tei encoding scheme. In Proceedings of the 24th Pacific Asia Conference on Language, Information and Compu- tation ...

  • 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)
    ... 0046 10 30.1621 0.3320 0.3217 0.3128 0.3199 0.0103 0.0192 0.0121 Energies 2016, 9, 617 10 of 15 Based on the data in Table 2, a statistical analysis was carried out and the following values were obtained: ‚ For model 1: The curved line dependency index ρ1 between the reduced distance R and soil ...
    ... 0789 0.0790 0.2197 0.0143 0.0142 ´0.1805 12 75.2014 0.0518 0.0561 0.0558 0.1781 ´0.0043 ´0.0040 ´0.1263 Based on the data in Table 5, a statistical analysis was carried out and the following values were obtained: ‚ For model 1 The curved line dependency index ρ1 between the reduced distance R and soil ...
    ... of Belgrade, Faculty of Mining and Geology. Author Contributions: Suzana Lutovac and Branko Gluščević performed the modelling, optimization and analysis of results. The paper was written by Suzana Lutovac with the support of Rade Tokalić and revised by Čedomir Beljić. Field measurement was performed ...

  • Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије

    Nebojša B. Atanacković (2018-08-31)
    Велики број напуштених рударских радова и ограничена средства за рекултивацијуи ремедијацију деградираних простора подстакле су развој метода за издвајањеприоритетних локација на које је потребно усмерити даља истраживања. У датомконтексту, у склопу израде дисертације спроведене су научно-истраживачкеактивности које су за предмет имале анализу утицаја значајнијих напуштенихрударских радова на водне ресурсе на простору Србије јужно од Саве и Дунава.Разматрање предметне проблематике извршено је кроз развој и примену семи-квантитативне методологије за анализу ризика од загађивања површинских иподземних вода на регионалној размери. Примењена ...
    анализа ризика, водни ресурси, водна тела, рудничке воде, рударскиотпад, аналитички хијерархијски процеси, кластер анализа, математичка теоријаатрибута, функције припадности, семи-квантитативне методе
    ... 88. Kaiser H.F. (1960) The Application of electronic computers to factor analysis. Educational and Psychological Measurement 20, Pp. 141-151. 89. Katz B.G., Gopalan T.B., Bullen T.D., Davis J.H. (1998) Use of chemical and isotopic tracers to characterize the interaction between groundwater and ...
    ... Materials 159: 152–157. doi 10.1016/j.jhazmat.2008.03.055 102. Massart D.L. and Kaufman L. (1983) The Interpretation of Analytical Chemical Data by the Use of Cluster Analysis. New York: Wiley. 103. Mayes W.M., Johnston D., Potter H.A.B., Jarvis A.P. (2009) A national strategy for identification, pr ...
    ... дијаграм тока процеса, анализа стабла догађаја (енгл. Event Tree Analysis, ETA), анализа стабла неисправности (енгл. Fault Tree Analysis, FTA) и анализа начина настајања и ефеката отказа (енгл. failure mode and effects analysis, FMEA). За све ове методе је заједничко да обједињују одређене одлуке ...

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... ubica ‘serial killer’ second constituent changes gen- der in plural forms AXNr petokraka zvezda ‘five-pointed star’ allows reverse order Based on an analysis illustrated by previous examples, we have developed a new functionality within LeXimir that offers one or more DELAC entries for ev- ery MWU presented ...
    ... and the plural form in all possible combi- nations, e.g. analiza dokumenta/analiza dokumenata/analize dokumenta/analize dokumenata ‘document(s) analysis/document(s) analyses’. Only the MWUs belonging to the first listed group belong to the super-class N2X and they require inflectional information ...
    ... construction of a DELAC type dictionary relies on a manually produced set of rules. The rule design strategy resulted from the afore- mentioned expert analysis of available MWU lemmas. The task of the rule based procedure is to automatically generate the complete MWU lemma. However, the strategy and the ...

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји
    ... research procedure comprised of two main parts. The first part of the research was related to the paleostress analysis in the research area, while the second one encompassed the analysis of the active stress field in this part of the Balkan peninsula. The research area represents the innermost part ...
    ... determine the paleostress tensors was done in two of these zones – the Kopaonik and the Maljen ones. Analysis of recently active stress field was done in all three seismogenic zones. Analysis of the paleostress fields which were active in this area during the Alpine orogenic cycle, consisted ...
    ... 213 Spang J.H. 1972. Numerical method for dynamic analysis of calcite twin lamellae. Geol. Soc. of America Bull. 183: 467 – 472 Sperner B., Ratschbacher L. 1994. A Turbo Pascal program package for graphical presentation and stress analysis of calcite deformation. Z. Dtsch. Geol. Ges. 145: 414 ...

  • Hibridni sistem za planiranje i analizu ventilacije rudnika

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilacija rudnika, informacioni sistemi
    ... ventilation network. The results obtained after the desired analysis by SimVent can be exported to VENTEX – a diagnostic expert system that performs the analysis of obtained results according to a number of criteria. The result of such an expert analysis is an estimate of the validity and effectiveness of ...
    ... Object-Oriented Analysis, Second edition Prentice Hall, Englewood Cliffs, New Jersey, (1991). 12. COOK A., "Methane Safety Research for Continuous Miners in South Africa", Proceedings of the 7th US Mine Ventilation Symposium, SME Littleton, Colorado, pp 55-60., (1995). 13. CROSS H., "Analysis of flow in ...
    ... LILIĆ N., OBRADOVIĆ I., “Computer-aided analysis of mine ventilation for emergency plans“, 1st Regional APCOM SYMPOSIUM , Zbornik radova str. 583-589, Bled Slovenia, (1994). 53. LILIĆ N., OBRADOVIĆ I., “An Expert System for Mine Ventilation Networks Analysis“, International Scientific Conference on ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... According to IRCK-CKH cooperation, more than 140 isotopic (ŽH/!H, !#O/!O and !5C/!C) and ionic analysis of the Beljanica karst groundwater were performed in the IRCK laboratories, as well as 28 analysis of the host rock isotopic composition for the purposes of the LJ. Vasić dissertation. Poseta ...
    ... research, especialy concerning water quality, defining of specific components of karst groundwater, preparation and analysis of water from various types of rocks, sampling and analysis of rocks and soil, as well as sample preparation for certain isotopic analyses. Moreover, the Laboratory is intended ...
    ... Mangan (Mn), Amonijak (NHa), Nitrite (NO). Uređaji za ispitivanje fizičko-hemijskih parametara vode na terenu Devices for measurements of physico-chemical parameters of water in situ Specijalna istraživanja koja izvodi CHK Poseban segment CHK-a čine specijalna – speleološka istraživanja (jame i ...

  • 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
    ... designed experiments. Chemical Engineering Journal, 137 (2), 436–442. KOMLJENOVIĆ M., PETRAŠINOVIĆ-STOJKANOVIĆ LJ., BAŠČAREVIĆ Z., JOVANOVIĆ N., ROSIĆ A., 2009: Fly Ash as the Potential Raw Mixture Component for Portland Cement Clinker Synthesis. Journal of Thermal Analysis and Calorimetry, vol ...
    ... l Journal of Coal Geology, 111, 5–22. ILIJEVIC K., OBRADOVIC M.H., JEVREMOVIC V., GRZETIC I.A., 2015: Statistical analysis of the influence of major tributaries to the eco-chemical status of the Danube River. Environmental monitoring and assessment, 187, 1–25 Уџбеници, скрипте, практикуми, м ...
    ... and behaviour diagnostics of drive groups on belt conveyors, Journal of Engineering failure analysis, 2012. 122. Tančić P., Dimitrijević R., Poznanović M., Pačevski A., Sudar S.: Crystal Structure and Chemical Composition of Ludwigite from Vranovac Ore deposit (Boranja Mountain, Serbia), Acta Geologica ...

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... minings for a specific work environment. In this paper, a special attention was paid to the seismic effect of blasting. In accordance with this, an analysis of the method for determining the soil oscillation law parameters, proposed by the Russian professor M.A. Sadovsky, was performed. For determination ...
    ... 6614 0.1594 0.0987 0.1159 0.0607 0.0435 No. 3, 2015 Mining & Metallurgy Engineering Bor 61 Based on the data in Table 3, a statistical analysis was carried out and the following values were obtained: Model 1: The curveline dependency index ρ1 be- tween the reduced distance R and soil ...
    ... Rock Mass in blasting, Ph. D. Thesis, Faculty of Mining and Geology, Belgrade, pp. 1- 240. [9] Trajković S., Lutovac S., Tokalić R.; (2008): Analysis of the Soil Oscillation Law in the Example of the Open Pit „Kovilovača“, Podzemni radovi No.16, pp. 47-56, December 2008, RGF Belgrade. [10] ...

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... ‘а’ can be confused for a Latin ‘a’ (denoting the same letter) or a Cyrillic ‘р’ can be confused for a Latin ‘p’ (denoting different letters). The analysis of frequently occurring OCR errors in Cyrillic texts showed that the following error types predominate: – Some individual letters are mutually confused ...
    ... from American English to British English”, 2004, uS Patent 6,738,738 Jaćimović, Jelena. “Textometric methods and the TXM platform for cor- pus analysis and visual presentation”. Infotheca – Journal for Digital Hu- manities Vol. 19, no. 1 (2019): 30–54. https://infoteka.bg.ac.rs/ojs/ index.php/Inf ...
    ... Correcting Spelling Errors”. Commun. ACM Vol. 23, no. 12 (1980): 676–687. http: //doi.acm.org/10.1145/359038.359041 Petković, Ljudmila. “Creation and Analysis of the Yugoslav Rock Song Lyrics Corpus from 1967 to 2003”. Infotheca – Journal for Digital Humanities Vol. 19, no. 1 (2019): 5–29. https://infoteka ...