Претрага

Упит dcterms_subject_txt:Physical and Theoretical Chemistry

2342 items

  • Alpine tectonic evolution of the Northern Serbo-Macedonian subunit: inferences from kinematic and petrological investigations

    Bojan Kostić, Uroš Stojadinović, Nemanja Krstekanić, Marija Ružić, Aleksa Luković (2021)
    ... the Northern Serbo-Macedonian sub-unit: inferences from kinematic and petrological investigations Bojan Kostić1, Uroš Stojadinović1, Nemanja Krstekanić1,2, Marija Ružić1, and Aleksa Luković1 1University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia 2Utrecht University, Faculty of Geosciences ...
    ... PannonianBasin. In order to segregate and quantify the effects of the Oligocene–Miocene extension we haveconducted a coupled kinematic, petrological and thermochronological study in the segments ofNorthern Serbo-Macedonian sub-unit adjacent to the Dinarides and Carpathians. The recenttectonic uplift ...
    ... situated along the European continental margin between the Pannonian Basin inthe north and the Aegean Sea in the south. Structurally, it comprises the innermost segments ofthe Dacia mega-unit of the European affinity and is juxtaposed against the Adria-derived units ofthe Dinarides across the Adria-Europe ...

  • Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела

    Трајче Бошевски (2021)
    Одлучивање и управљање у рударству је захтеван и сложен задатак изложен ризицима. Конвенционални-искуствени приступи доношења одлука, у пракси често показују слабост која се огледа у недовољној поузданости и прецизности. Предмет истраживања докторске дисертације, под називом „Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела“ је да, сагледавањем научних метода линеарног програмирања, приступи формирању локацијских модела који би били засновани на анализи и прилагођавању постојећих и увођењу нових претпоставки за случајеве као што је експлоатација и потрошња кречњака. У дисертацији ...
    оптимизација, линеарни локацијски модел, линеарно програмирање, експлоатација и производња кречњака
    ... 500 Internal Server Error

    Internal Server Error

    The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

    ...

  • Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process

    Snezana Savkovic, Predrag Jovancic, Stevan Djenadic, Milos Tanasijevic, Filip Miletic (2022)
    This paper presents a methodology for evaluating and ranking different bucket wheel excavators (BWE) for determining which machine should enter in the process of revitalization and modernization. Various multicriteria methods are used. Combining them achieves the best effect when choosing BVE for the modernization process. AHP, TOPSIS, VIKOR, and PROMETHEE methods are used. The hybrid models are developed from the multi-criteria decision making (MCDM) methods and they are used to evaluate the basic indicators that characterize the operation of ...
    višekriterijumsko odlučivanje, rotorni bageri, modernizacija, ekspertska analiza

  • Karst groundwater quantity assessment and sustainability: the approach appropriate for river basin management plans

    Veljko Marinović, Zoran Stevanović (2019)
    As a result of the fact that karstified rocks can accumulate large amounts of high-quality groundwater, karst aquifer is considered, throughout the world, one of the most important types of aquifers. Due to their high permeability, but also vulnerability to pollution, these precious groundwater resources need to be properly evaluated and protected. Taking into account heterogeneity and complexity of the karst environment, it is difficult to propose a uniform algorithm for managing karst groundwater, which causes the necessity to ...
    Upravljanje karstnim podzemnim vodama, Pritisci na kvantitet voda, Plan upravljanja vodnim resursima, Bosna i Hercegovina, Srbija

  • Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia

    Dragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić (2022)
    The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...
    municipal solid waste, secondary compression index, ratio of modified secondary and primary compression index

  • Ecological status of the Lim river alluvium in Serbia

    Amel Kurbegović, Boris Vakanjac, Vesna Ristić Vakanjac, Mirjana Bartula, Zorana Naunović, Nikola Milovanović, Jovan Kovačević (2022)
    Three countries share the catchment of the Lim River and they have been engaged in an eco-logical struggle for years, to conserve the river, its tributaries, and biodiversity. Honoring international conventions and declarations, along with active involvement of the civil society and support of Eu-ropean Union agencies, major efforts are being made to draw attention to the degradation of nature, especially water, which is essential for life on the planet Earth. Considering that natural resources are limited and that ...
    aluvijum, zagađenje vode, ekološki status, reka Lim

  • Hazardous substances in karst aquifer waters - one of the results of the operational monitoring of groundwater in Serbia

    Zoran Stevanović, Veljko Marinović, Branislav Petrović (2020)
    У циљу оцене стања животне средине и разумевања потенцијалних узрока још раније евидентираног лошег хемијског статуса водног тела подземних вода „Крш–север“, извршенa je хидрогеолошка проспекција шире околине лежишта бакра Мајданпек, која је укључилаистраживање површинског копа, флотационог језера и главних карстних врела и пећина. Имајући у виду да се експлоатационо поље рудника бакра Мајданпек директно граничи са карстном издани и водним телом подземних вода „Крш–север“, параметри квалитета подземне воде су анализирани (in situ и лабораторијски) на два главна карстна врела ...
    Опасне супстанце, карстна издан, бакар, флотацијско језеро, Мајданпек, Србија

  • Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... demonstrates the synthesis and characterization of Cao.Ero,,MnOx perovskite powder using the sucrose nitrate procedure (SNP) technique. The following substances were used to obtain this complex perovskite: sucrose CoH>»O,,, Which has a dual role (complexant and fuel), and metal nitrates were used ...
    ... Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3 Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Preparation, synthesis and characterization of ...
    ... NJCJE LONG SCIENTISTS, IN CERAMICS 15% ECerS CONFERENCE for YOUNG SCIENTISTS in CERAMICS PROGRAMME and BOOK OF ABSTRACTS October 11-14, 2023 Novi Sad, Serbia Programme and Book of Abstracts of The ECerS 15 Conference for Young Scientists in Ceramics (CYSC-2023) publishes abstracts ...

  • CC-PESTO: a novel GIS-based method for assessing the vulnerability of karst groundwater resources to the effects of climate change

    Zoran Stevanović, Veljko Marinović, Jelena Krstajić (2020)
    The new GIS-based CC-PESTO method is shown to successfully assess and map the vulnerability/resilience of karst aquifers to effects of climate change. Karst aquifers were chosen due to their importance at the global level and widespread utilisation in potable water supply and irrigation, but also because of their hydrogeological complexity. The method was developed to assess the intrinsic vulnerability of aquifers, without considering the direct impact of variable climate factors, but considering the adaptive capacity of aquifers in response ...
    Klimatske promenem Karst, Ranjivost, Geografski informacioni sistemi, Crna Gora, Srbija

  • Sexual dimorphism and left-right asymmetry of carapace ornamentation in Hemicytheria setosa RUNDIĆ 2002

    Vukica Vujić, Ljupko Rundić, Tamara Karan-Žnidaršič (2019)
    In biostratigraphic research of the Upper Miocene of the Pannonian Basin System, one of the frequently detected and important ostracod genera is Hemicytheria. Among more than 20 species of this genus, Hemicytheria setosa is present in sandy facies of the Lake Pannon sediments in Serbia and Bosnia and Herzegovina. The aims of this study were to describe sexual dimorphism and differences between left and right valve morphology in Hemicytheria setosa. Landmark based geometric morphometrics is applied on the grounds ...
    Morfologija ljušture, Ostrakode, geometrijska morfometrija, gornji miocen, južni deo Panonskog basena

  • Determining seismic hazard in slowly deforming region: Can we gather enough information from karst caves?

    Ана Младеновић, Јелена Ћалић (2021)
    ... structure and existence of a large number of rock discontinuities, aswell as relatively long time during which these geological units have been exposed on the surface,led to intensive karst process and formation of both surface and underground karst forms.Therefore, investigations of faults and deformations ...
    ... information from karst caves? Ana Mladenović1 and Jelena Ćalić2 1University of Belgrade - Faculty of Mining and Geology, Department of Geology, Belgrade, Serbia (ana.mladenovic@rgf.bg.ac.rs)2Geographical Institute Jovan Cvijić, Serbian Academy of Sciences and Arts, Đure Jakšića 9, Belgrade, Serbia (j.calic@gi ...
    ... known seismicity in the region, and another, which is based on data related to the faultingprocesses and determination of seismically active faults. Both groups of methods are relativelygood for seismically active regions. However, in regions of low seismic activity and slowdeformations, there is neither ...

  • First paleomagnetic and magnetic anisotropy results from Montenegrо - the coastal area

    Emö Márton, Vesna Cvetkov, Martin Đaković, Vesna Lesić, Slobodan Radusinović (2021)
    ... under the Creative Commons Attribution 4.0 License. First paleomagnetic and magnetic anisotropy results fromMontenegro – the coastal area Emö Márton1, Vesna Cvetkov2, Martin Đaković3, Vesna Lesić4, and Slobodan Radusinović3 1Mining and Geological Survey of Hungary, Paleomagnetic Laboratory, Budapest, Hungary ...
    ... First paleomagnetic and magnetic anisotropy results from Montenegrо - the coastal area Emö Márton, Vesna Cvetkov, Martin Đaković, Vesna Lesić, Slobodan Radusinović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] First paleomagnetic and magnetic anisotropy ...
    ... gov.hu) 2University of Belgrade-Faculty of Mining and Geology, Department of Geophysics, Djušina 7, 11000 Belgrade, Serbia 3Geological Survey of Montenegro, Naselje Kruševac bb, 81000 Podgorica, Montenegro 4University of Belgrade-Faculty of Mining and Geology, Belgrade, Serbia. (PhD student) In the Southern ...

  • Geothermal potential, chemical characteristic and utilization of groundwater in Serbia

    Tanja Petrović Pantić, Katarina Atanasković Samolov, Jana Štrbački, Milan Tomić (2021)
    To collect and unify data about all geothermal resources in Serbia, a database was formed. The database allows us to perceive the geothermal resources of Serbia and their potential for utilization. Based on the data available in the geothermal database, the estimated temperatures of reservoirs, heat power, and geothermal energy utilization were calculated. The database contains 293 geothermal records (springs, boreholes) registered at 160 locations, with groundwater temperatures in the range between 20 and 111 °C. The maximum expected ...
    Geothermal database, Geothermal resources, Geothermal potential, Hydrochemistry, Hierarchical cluster analysis, Serbia

  • The Effect of Gravel and Sand Mining on Groundwater and Surface Water Regimes — A Case Study of the Velika Morava River, Serbia

    Milan Kresojević, Vesna Ristić Vakanjac, Dragan Trifković, Jugoslav Nikolić, Boris Vakanjac, Dušan Polomčić, Dragoljub Bajić (2023)
    Овај рад описује како неконтролисано и нелегално откопавање песка и шљунка може утицати на режим површинских и подземних вода на местима где постоји активна хидрауличка веза између њих, са студијом случаја реке Велике Мораве у Србији. Такође, промена геометрије попречног профила, као последица антропогених и природних фактора, отежава уливање ове реке за укључивање у водне токове Србије. Плодност Велике Мораве омогућила би развој речног саобраћаја како за трговачке бродове, тако и за пловила Речне флотиле Војске Србије. Корелације између ...
    експлоатација песка и шљунка, режим површинског тока, режим подземних вода

  • Korelacija magnetnog susceptibiliteta i sadržaja metala u flotacijskom jalovištu

    Filip Abramović, Vesna Cvetkov, Aco Ilić, Dragana Životić (2022)
    Procena metala u rudama, jalovištu i zemljištu se tradicionalno određuje hemijskim metodama kao što su Rengen fluorescentna analiza (XRF), Instrumentalna neutronska aktivaciona analiza (INAA) i Masena spektrometrija induktivno spregnute plazme (ICP-MS). Neke od pomenutih metoda su veoma zahtevne i skupe, te se nametnula potreba ka traženju jeftinijeg alata za brzu procenu prisustva pojedinih metala. Tokom poslednjih nekoliko decenija, mnoge studije su pokazale da su magnetna merenja dovoljno osetljiva da detektuju magnetni signal feromagnetnih materijala, a samim tim i metala ...
    flotacijsko jalovište, makroelementi, magnetna merenja

  • Tectonothermal evolution of an asymmetric extensional system: the Juhor Mts in Central Serbia (Northern Serbomacedonian massif)

    Miloš Radonjić, Uroš Stojadinović, Elco Luijendijk, Dejan Radivojević, Željko Golubović, Nikola Vuković (2018)
    асиметрична екстензија, панонски басен, српско‐македонски масив, термохронологија
    ... the  SE  Serbia  and  adjacent  countries  have  inferred  that  the  peak  metamorphic  event  in  the  Serbomacedonian  unit  is  Variscan  and  that  its  magmatism  had  a  long  Paleozoic  evolution  (Antić  et  al.,  2016a).  South  of  our  study  area,  a  coupled  kinematic  and  thermo‐ chronological  ...
    ... an unit  in  the  footwall and  the weakly metamorphic Supragetic nappe  in  the hanging‐wall  (Erak et al., 2016).  This type and age of deformation was recently described in other neighbouring areas situated in similar  tectonic positions along  the Dinaridic  strike and are  related  to  the extension  ...
    ... ,  and  litho‐stratigraphic  contrast between  the  Juhor metamorphics and  the adjacent Miocene  to Quaternary deposits. Hence,  the  observed  omission  could  infer  that  the  later  stages  of  deformation  in  the  northern  Serbomace‐ donian Massif were directly  related  to  formation and ev ...

  • Risk Evaluation: Brief Review and Innovation Model Based on Fuzzy Logic and MCDM

    Stevan Djenadic, Milos Tanasijevic, Predrag Jovancic, Dragan Ignjatovic, Dejan Petrovic, Ugljesa Bugaric (2022)
    The risk assessment of engineering systems represents an important part of the quality of service and dependability. The existing methods for risk evaluation use crisp sets for rating partial indicators’ proposition and their cumulative products as an overall indicator. In this paper, existing FMEA and FMECA methods have been improved using the fuzzy expert system for calculating the risk priority number. The application of fuzzy logic allows the use of linguistic descriptions for risk analysis. In this way, the ...
    rizik, inženjerski sistemi, fazi logika, višekriterijumske metode

  • Termička zrelost organske supstance i naftno-matični potencijal istočne Hercegovine

    Nikoleta Aleksić (2021)
    Cilj istraživanja, obrade i interpretacije rezultata prikazanih u disertaciji je utvrđivanje termičke zrelosti organske supstance i naftno-matičnog potencijala sedimentnih stena na području istočne Hercegovine, primenom metoda pirolize Rock-Eval, organo-petrografskog proučavanja organske supstance u normalnoj svetlosti i fluorescenciji, koja je pored kvalitativne analize uključila posebno i refleksiju vitrinita. Osim toga, na osnovu organsko-geohemijskih analiza sagledane su karakteristike i poreklo ekstrahovanog bitumena metodom gasne hromatografije - masene spektrometrije, pri čemu su izvršene analize biomarkera kao geohemijskih indikatora. Tokom rada na doktorskoj ...
    organska supstanca, termička zrelost, matične stene, naftni potencijal, refleksija vitrinita, piroliza Rock-Eval, biomarkeri, Karbonatna platforma, istočna Hercegovina

  • Cyanobacterial diversity and toxicity of biocrusts from the Caspian Lowland loess deposits, North Iran

    Tamara Dulić, Jussi Meriluoto, Tamara Palanački Malešević, Violeta Gajić, Tamara Važić, Nada Tokodi, Igor Obreht, Bojan Kostić, Petar Kosijer, Farhad Khormali, Zorica Svirčev (2016)
    Biocrusts and adjacent sediments were collected from the so-called loess plateau of Northern Iran and the loess deposits on the foothills of Alborz Mountains. The mineralogical and granulometric analyses characterized sediments as quartz-rich clayey or sandy silts. Cyanobacterial diversity, colony morphology and grain stabilization were studied by light and scanning electron microscopy, which showed glue-like layers of cyanobacterial EPS and dense networks of filamentous cyanobacteria immobilizing finer and bigger grains, respectively. Amorphous, tuft and globular cyanobacterial colony structures were also detected. 15 cyanobacterial genera were ...
    Biokore, Cijanobakterije, Diverzitet, Cijanotoksini, Stabilizacija sedimenata, Les

  • Numerical Modeling and Simulation of the Effectiveness of Groundwater Source Protection Management Plans: Riverbank Filtration Case Study in Serbia

    Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin, Dragan Pamučar (2022)
    The paper describes the establishment and testing of an algorithm for developing sustainable management plans associated with groundwater source protection against potential pollutants and discusses the effectiveness of individual systems. The applied methodology pertains to groundwater resource management, particularly those cases that involve riverbank filtration. Namely, groundwater (numerical) modeling is employed to examine the groundwater regime and balance, as well as to create protection systems and illustrate their effectiveness. Particle tracking analysis is used to study pollutants’ travel and ...
    Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry