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Упит dcterms_subject_txt:mathematical content

471 items

  • Karstification depth and storativity as main factors of karst aquifer regimes: some examples from southern Alpine branches (SE Europe and Middle East)

    Zoran Stevanović, Vesna Ristić-Vakanjac, Saša Milanović, Ljiljana Vasić, Branislav Petrović, Marina Čokorilo-Ilić (2015)
    Earth-Surface Processes,Geology,Pollution,Soil Science,Water Science and Technology,Environmental Chemistry,Global and Planetary Change

  • Seasonal Variations of the Zapadna Morava River Water Quality

    Nebojša Đ. Pantelić, Jana S. Štrbački, Goran Marković, Jelena B. Popović-Đorđević (2021)
    The water samples collected from four localities of the middle course of the Zapadna Morava River during 2020 were analyzed via the selected physicochemical parameters with the aim to estimate the quality of surface water. According to the results of selected physico-chemical parameters (pH, conductivity, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand), analyzed surface water show a good chemical status, while the values of nutrient content (nitrate, nitrite, ammonium ion, total phosphorus) indicated the poor chemical status especially ...
    water quality, dissolved oxygen, ammonium ion, total phosphorus

  • Malathion-induced inhibition of human plasma cholinesterase studied by the fluorescence spectroscopy method

    V. M. Pavelkić, K. S. Krinulović, J. Z. Savić, M. A. Ilić (2008)
    The in vitro effect of technical grade malathion was assessed via the kinetic parameters of human plasma butyrylcholinesterase (BChE) using N-methylindoxyl acetate as a substrate for BChE. An inhibitor kinetics study demonstrated the existence of a biphasic inhibition curve, indicating high- and low-affinity binding sites of malathion. The IC50 values as calculated from the experimental inhibition curves were 1.33 × 10–9 and 1.48 × 10–5 M for the high- and low-affinity binding sites, respectively; Hill’s analysis gave 1.29 × ...
    Малатион, инхибиција, хумана плазма холинестераза, метода флуоресцентне спектроскопије

  • DFT study of free radical scavenging activity of erodiol

    Zoran Marković, Jelena Đorović, Milan Dekić, Milanka Radulović, Svetlana Marković, Marija Ilić (2013)
    Antioxidant activity of erodiol was examined at the M05-2X/6-311+G(d,p) level of theory in the gas and aqueous phases. The structure and energy of radicals and anions of the most stable erodiol rotamer were analyzed. To estimate antioxidant potential of erodiol, different molecular properties were examined: bond dissociation enthalpy, proton affinity together with electron transfer energy, and ionization potential followed by proton dissociation enthalpy. It was found that hydrogen atom transfer is the prevailing mechanism of erodiol behavior in gas; ...
    депсиде, еродиол, механизми за уклањање слободних радикала, БДЕ, ИП, ПА

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • Дефинисање хидрауличког механизма истицања карстних подземних вода применом биваријантне анализе временских серија

    Вељко Мариновић (2022)
    Bivariate analysis was applied within the cross-correlation in time and the gain function as part of the cross-spectral function in the frequency domain, to the time series of precipitation and discharge of the Oko Bijela and Bosna karst springs in the period 2015-2020. Bivariate analysis showed a very fast reaction of the Oko Bijela spring and a reaction delay at the Bosna spring, which indicate a very weak amortization of the input signal within the Oko Bijela system and ...
    карст, подземне воде, механизам истицања, крос-корелација, спектрална анализа

  • Утицај реактивираних раседа на развој крашког процеса: примери из Карпато-балканида источне Србије

    Ана Младеновић (2022)
    Carpatho-Balkanides represent part of the complex Dinaric-Carpatho-Balkan orogenic system, that geomorphologically dominates the central part of the Balkan peninsula. The existence of this orogenic system is a result of closure of the Neotethys ocean and subsequent convergence of the Adriatic microplate and the Eurasian continent, that has been still active in the recent times. Such geodynamic characteristics conditioned complex tectonic structures, multiply reactivated during Late Cretaceous and Cenozoic. The main aim of this research is to determine impact of ...
    Карпато-балкански ороген, реактивирани расед, спелеолошки објекат, крашки процес

  • Interaction of sodium dodecylsulfate (SDS) with homoionic montmorillonites: adsorption isotherms and metal-ion release

    M. Ilic, J. Gonzalez, A. Pohlmeier, H. D. Narres, M. J. Schwuger (1996)
    The interaction of dodecylsulfate anions (DS−) with homoionic Ca-, Mg-, Ni-, Cu-, Cd-, Pb- and Fe-montmorillonites were investigated. Mg- and Cd-montmorillonite do not adsorb DS−, and an anion exchange at the edges of the clay mineral does not take place. Three different adsorption processes are identified on the other montmorillonites: i) Fe-montmorillonite is covered with amorphous iron hydroxide, and DS−-anions are bound at positively charged sites. ii) On Ca- and Pb-montmorillonite DS− is precipitated as Me(DS)2. iii) On Ni- ...
    Натријум додецилсулфат, адсорпциона преципитација, монтморилонит

  • A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić (2012)
    This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...
    multilingual digital libraries, query expansion, TMX
    ... standard and size, etc.) data, of a potentially variable structure, the content of which can grow exponentially. Manipulation of such data, which in general encompass documents, metadata content, user-generated content, RSS feeds, e-mails, geospatial data, etc. asks for an approach that differs ...
    ... authorship and title proper – author name, affiliation, e-mail, article title and its categorization as well as pagination within the issue, and - content metadata – abstract, keywords, and expert classification according to Universal Decimal Classification (UDC). 1711 Figure 2. An example ...
    ... ), the and , are entered in both languages (Serbian and English), using the attribute xml:lang to denote the language of the content (see Figure 2). These metadata can be used for refinement of “full text” document search, as well as for additional forms of searching and browsing ...

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... for labeling and annotation of cartographic content both in Serbian and English. Such annotation is enabled by the existing relations between Serbian and English translational equivalents, and by the strict relation between the dictionary and the content of the database. Some other controlled di ...
    ... of e-learning courses on Moodle during the past three years additional modules have been added on an "as needed" basis, such as the module for mathematical formulas. By the end of the academic year 2011/12 the number of courses created on Moodle has doubled in comparison with the previous academic ...
    ... data types, and the like). Controlled dictionaries derived from RudOnto also serve for validation, classification and specification of the content stored in its database. In addition to that, as the importance of efficient and flexible database search and information extraction on the web is ...

  • Flotability of chalcopyrite from the Rudnik deposit

    Đurica Nikšić, Predrag Lazić, Milena Kostović (2021)
    Директно селективно флотирање олова, бакра и цинка у флотацији рудника „Рудник” датира од 1984. године. Технолошка шема омогућава директно издвајање селективних концентрата у три циклуса. У првом циклусу се издваја минерал олова (галенит), док су минерал бакра (халкопирит) и минерал цинка (марматит) депримирани. У другом циклусу се оток концентрације минерала олова кондиционира и припрема за издвајање минерала бакра. Након кондиционирања, у овом циклусу се издваја минерал бакра. У трећем циклусу се оток концентрације минерала бакра кондиционира и припрема за ...
    Директно селективно флотирање, халкопирит, KAX, NaCN

  • Репозиторијум дигиталних идентификатора објеката – доиФил: изградња, стање и перспективе

    Милош Утвић, Михаило Шкорић (2017)
    Филолошки факултет Универзитета у Београду је крајем јула 2015. године склопио уговор са агенцијом Crossref и тиме стекао право да својим публикацијама додељује дигитални идентификатор објекта (DOI), као и публикацијама других издавача које заступа. Истовремено, у склопу уговора, Филолошки факултет је развио репозиторијум доиФил који за све регистроване публикације чува њихове библиографске метаподатке, хипервезу ка комплетном тексту и сам DOI. После припремних радњи и разраде процеса на којима је заснован рад репозиторијума, у новембру 2016. године је репозиторијум доиФил ...
    DOI, дигитални идентификатор објекта, Crossref, Филолошки факултет
    ... Agency Crossref in July 2015. As a member of Crossref community, Faculty of Philology can register content, deposit metadata and assign a DOI to original works published by the Faculty and to a content published by the other organizations the Faculty represents. Also, doiFil, a repository of registered ...
    ... свеске 22 чланци 504 Табела 2 Основни статистички подаци о броју регистрованих DOI-бројева по типовима публикација 20 http://www.mpn.gov.rs/wp-content/uploads/2018/07/Platforma-za-otvorenu- nauku.pdf 89 БИБЛИОИНФО Извори Crossref, https://www.crossref.org/ (приступано 1.3.2019). Crossref XSD ...
    ... (преузето 1.3.2019). Министарство просвете, науке и технолошког развоја Републике Србије. Платформа за отворену науку. http://www.mpn.gov.rs/wp-content/uploads/2018/07/ Platforma-za-otvorenu-nauku.pdf (преузето 1.3.2019). RIS Tag Map, https://github.com/aurimasv/translators/wiki/RIS-Tag-Map (приступано ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    The infuences of the application of mono- and two-component organic modifers on lipophilicity determination of 12 tetradentate Schif bases by reversed-phase thin layer chromatography were investigated. The main goal is to estimate types of interaction between observed compounds and components of the applied chromatographic systems and establish some behaviour pattern in order to easier choose a combination of organic modifers which will simulate interaction in biological systems based on the facts that the same basic intermolecular interactions are responsible ...
    Materials Chemistry, Industrial and Manufacturing Engineering, General Chemical Engineering, Biochemistry,General Chemistry

  • Annotation of the Serbian ELTeC Collection

    Ranka Stanković, Cvetana Krstev, Branislava Šandrih Todorović, Mihailo Škorić (2021)
    Ovaj rad predstavlja takozvano izdanje nivoa 2 kolekcije tekstova SrpELTeC razvijene u okviru aktivnosti Radne grupe 2 – Metode i alati COST akcije CA 16204 (Distant Reading for European Literary History) i njene specifikacije šeme. Izdanje nivoa 2 je nastavak izdanja nivoa 1, koje se koristi kao ulaz za morfosintaksičke i NER anotacije romana. Srpska obrada nivoa-2 je navedena kroz potrebne korake, uključujući metode i alate koji se koriste u tom procesu. Neki statistički podaci iz srpske kolekcije nivoa ...
    udaljeno čitanje, literarni korpus, tagiranje, prepoznavanje imenovanih entiteta, lematizacija, ELTeC

  • Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt.

    Branislav Petrović (2022)
    The epikarst is a part of the karst outcrop that is located within the unsaturated zone and represents a complex point of contact and mixing of unconsolidated material from the terrain surface. The correct and complete perception of epikarst, its degree of development and the presence on the limestone terrain can be achieved with a multidisciplinary approach. The study area for the applied multidisciplinary research was the Eastern part of karst massif Suva Planina Mt. One important part of ...
    epikarst, specifična električna provodljivost, Suva Planina, pećina Peč

  • Structural and microstructural study of brookite based TiO2 nanocomposites with carbon black (C)

    Aleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Maja Šćepanović (2022)
    Structural and microstructural properties of TiO2-based nanocomposites with carbon black (C), synthesized by sol-gel-hydrothermal method, have been studied by XRPD and Raman scattering. Detailed size-strain analyses of XRPD and Raman scattering results are presented in order to investigate the influence of C content on brokite and anatase phase formation. The XRPD size-strain analyses have resulted in reliable structure and microstructure results for both anatase and brookite and their relative abundance ratio has been refined by Rietveld method. The brookite ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    The infuences of the application of mono- and two-component organic modifers on lipophilicity determination of 12 tet radentate Schif bases by reversed-phase thin layer chromatography were investigated. The main goal is to estimate types of interaction between observed compounds and components of the applied chromatographic systems and establish some behaviour pattern in order to easier choose a combination of organic modifers which will simulate interaction in biological systems based on the facts that the same basic intermolecular interactions are ...
    Materials Chemistry, Industrial and Manufacturing Engineering, General Chemical Engineering, Biochemistry, General Chemistry

  • Effect of natural gas composition on methane number: A case of gas reservoirs in Serbia

    Marija Živković, Milica Ivić, Dejan Ivezić, Aleksandar Madžarević (2017)
    Natural gas is considered as the most environmentally acceptable fossil fuel, thus it is an alternative to petroleum derivate, dominantly used in internal combustion engines. Physical properties of a fuel as well as behavior during combustion process are affected by its composition. This article presents analysis of effect of natural gas composition on methane number (MN), conducted for natural gas deposits in Serbia. For empirically determination of MN: California air resources board (CARB) method and Linear and Anstalt für ...
    Састав, метански број, природни гас

  • Synthesis of MnCo2O4 nanoparticles as modifiers for simultaneous determination of Pb(II) and Cd(II)

    Vesna Antunović, Marija Ilić, Rada Baošić, Dijana Jelić, Aleksandar Lolić (2019)
    The porous spinel oxide nanoparticles, MnCo2O4, were synthesized by citrate gel combustion technique. Morphology, crystallinity and Co/Mn content of modified electrode was characterized and determined by Fourier transform infra-red spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction pattern analysis (XRD), simultaneous thermogravimetry and differential thermal analysis (TG/DTA). Nanoparticles were used for modification of glassy carbon electrode (GCE) and new sensor was applied for simultaneous determination of Pb(II) and Cd(II) ions in water samples with the ...
    MnCo2O4 nanočestice, modifikatori, određivanje Pb (II) and Cd(II)

  • Speleo‐morphology and tectonic processes – What can be seen in slowly deforming regions?

    Ana Mladenović, Jelena Ćalić (2022)
    There are a lot of methods used to determine tectonic process active in a region, and they vary depending on the purpose of the research. However, a number of them cannot be used in slowly deforming regions, because the effects of active tectonic process on the rocks in such regions could be negligible. This is especially true for the recently active tectonics in such regions, since most of the recently active tectonic structures never reach the surface. Because of ...