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Упит dcterms_subject_txt:mature field

512 items

  • 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
    ... Analysis of the magnetization data revealed the positions of the three lowest crystal field levels of the Yb3+ cations, as well as the corresponding projections of their angular momentum on the direction of the magnetic field. 1. Introduction Awide range of optical and magnetic properties of rare-earth ...
    ... ordering (Latshaw et al., 2015c,a; Morrison et al., 2017). In all reported samples, the zero-field cooled magnetic susceptibility was measured as a function of temperature between 2 and 300 K in an applied field of 1000 Oe. Latshaw et al. (2016b) reported the first study on the magnetism of the structural ...
    ... ordering (Latshaw et al., 2015c,a; Morrison et al., 2017). In all reported samples, the zero-field cooled magnetic susceptibility was measured as a function of temperature between 2 and 300K in an applied field of 1000 Oe. Latshaw et al. (2016b) reported the first study on the magnetism of the structural ...

  • Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin

    Filip Anđelković, Dejan Radivojević (2018)
    ... of Pannonian age. Those rocks correspond to the Endrőd formation hemipelagic marls, one of the source rocks at the largest hydrocarbon field in Hungary – Algyő field (Magyar et al., 2006). The marly limestones and limy marls of Lower Miocene are most contributing source rocks in Croatian part of Pannonian ...
    ... Basin in Croatia. Marine and Petroleum Geology 18, 133–147. Magyar, I., Fogarasi, A., Vakarcs, G., Bukó, L., Tari, G.C. 2006. The largest hydrocarbon field discovered to date in Hungary: Algyő. In: Golonka, J., Picha, F.J. (Eds). The Carpathians and their foreland: geology and hydrocarbon resources, AAPG ...

  • Fourth Summer Datathon on Linguistic Linked Open Data

    Tijana Radović, Ranka Stanković (2023)
    The 4th Summer Datathon on Linguistic Linked Open Data (SD-LLOD-22) was held in Spain, in Cersedilla near Madrid, in May 2022, and organized by the COST Action NexusLinguarum. The school gathered interested researchers, academics, students who wanted to acquire and/or expand their knowledge in the field of linguistic linked data science. During the school, a spectrum of topics from the field of linked data was presented, from various ontologies, through document integration, annotation and natural language text processing tools ...
    linguistic linked open data, sentiment analysis, linked data, RDF

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... nephelometric measurements. AQUA LYTIC NOx – laboratory/field-portable photometer for measuring nitrite content in water. AQUA LYTIC Fe — laboratory/field-portable photometer for measuring iron content in WaterT. AQUA L1YTIC NHa – laboratory/field-portable photometer for measuring ammonium ion content ...
    ... ugljenika u prirodi i njegovog uticaja na karstni proces Field trip and setting up of carbonate tablets in the ground to analyse the dynamics of the carbon cycle in nature and its impact on the karst process Dr. Cao presented field equipment and devices that should be installed on karst terrains ...
    ... Ovakvi sistemi za podvodna snimanja su 34 Field equipment Research in boreholes and wells The most important objects in karst research are investigation boreholes and exploitation wells. The research that CKH performs on these objects during field research are: Measurement of groundwater level ...

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... shows that machines with the highest availability operate on the Field D, while the lowest availability is recorded for the machines on the Tamnava field. F. Verifications of results For bulldozers that operate at Tamnava and Field D, recorded data about uptime (t1) and downtime (t2) are available ...
    ... analyzed. Three different bulldozers (Liebherr - Lib, Dressta – Drs, Caterpillar - Cat), at three different surface mines (Drmno – D, Tamnava West Field – T, Field D – F) were considered. Availability evaluation was made based on experts’ judgments and assessments. The fuzzy inference engine is used to ...
    ... 38/good,0.22/avr; S(D-Cat.) = 0.14/exc,0.76/good,0.1/avr; On the base of questionnaires for eight analysts for Tamnava west field – Kolubara basin and seven analysts from Field D – Kolubara basin, final grades for bulldozers are: R(T-Lib.) = 0.13/exc,0.5/good,0.38/avr; M(T-Lib.) = 0.03/good,0.85/aver ...

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... the mining waste field, on the carrier of exploration and/or exploitation or economic entity that produces mining waste, on the economic entity which is the operator of mining waste, on the characterization and categorization of mining waste landfills within the mining waste field, as well as other ...
    ... details of all titleholders in the database, while the class terrain_record models notes taken during field visits. The class multimedia is intended for photos and video records collected during field visits. The spatial polygonal class abandoned_facility describes the geometric parameters of the degraded ...
    ... integrate it with the existing GIS application GeolIEP for management of exploration and exploitation permits and works in the mineral resources field. GeolIEP represents a basis for archiving and efficient handling of vector, raster and related thematic alphanumeric content in one place, as well ...

  • Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке

    Весна Цветков, Илија Васиљевић, Бранислав Сретеновић, Весна Дамњановић (2018)
    ... remanent magnetization  (the  thermoremanent magnetization  is particularly significant  in  archeology). Since the Earth's magnetic field is ubiquitous, the magnetic field below the instrument can  be amplified or diminished by the fields arising from archaeological objects such as: fireplaces and burnt  ...
    ... ations of archaeological sites can be carried out in two ways. The first, in which  the total magnetic field of the Earth is measured by moving one sensor, and the other, when the mag‐ netic field gradient is measured and is performed by moving the sensor pair. More precisely, both me‐ thods require ...
    ... y relation that  links the field  (magnetic or gravitational) and  its gradients along the  directions (x, y and z) with the source position by the degree of homogeneity (N). The degree of homo‐ geneity is the measure of the decrease of the intensity of the magnetic field with the distance from the  ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... goal of the implementation of GeolISS is the integration of existing geologic archives, data from published maps on different scales, newly acquired field data, intranet and internet publishing (BLAGOJEVIĆ et al., 2008). GeolISS was implemented in ArcGIS 9.3.1 technology as a collection of .Net classes ...
    ... rs/geoliep. GeolIEP is a sub- system of GeoISS which deals with keeping track of exploration and exploitation permits and works in the mineral resources field, and represents a basis for archiv- ing and efficient handling of vector, raster and related thematic alphanumeric content in one place, as well as ...
    ... associ- ated with specific fields in the function of search cri- teria. Since the data on available search fields, as well as the weight factors for each field, are located in the database, a simple change of these values provides for dynamical adding of criteria, as well as fine-tuning of 64 ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... for the Selection of an Artificial Lift Method at the Test Well GL oil well in Salman oil field in Iran has been chosen as a test well. The Salman oil field data are given in Table 4. Table 4. Salman oil field input data [12]. Parameters Value Unit Production, Reservoir and Well constraints production ...
    ... exploiting the analyzed field are the estimated GL method (grade 0), ESP (grade 1), followed by HP (grade 2) and finally PCP and SRP (grade 3). Figure 5. Results of the artificial lift method selection in the Salman field using the ELECTRE model [12]. Data from the Salman oil field are included in model ...
    ... Application of Conceptual Model for the Selection of an Artificial Lift Method at the Test Well GL oil well in Salman oil field in Iran has been chosen as a test well. The Salman oil field data are given in Table 4. Selection of mentioned method was done using an optimization model based on a multi-criteria ...

  • Geologic Information System of Serbia

    Branislav Blagojević, Branislav Trivić, Ranka Stanković, Nenad Banjac, Olivera Kitanović (2011)
    Geologic information system of Serbia (GeolISS) represents repository for digital archiving, query, retrieving, analysis and geologic data visualization. The GeolISS is implemented through ESRI ArcGIS technology, and is designed to operate as a personal geodatabase (MS Jet 4.0 Engine) and SDE enterprise geodatabase in MS SQL Server. The objective of GeolISS implementation is integration of existing geologic archives, data from published maps at different scales, newly acquired field data, as well as Web publishing of geologic information. Physical implementation ...
    Geologic information system, Conceptual model, Logical model, Implementation, Geodatabase
    ... objective of GeolISS implementation is integration of existing geologic archives, data from published maps at different scales, newly acquired field data, as well as Web publishing of geologic information. Physical implementation of GeolISS has been guided with conceptual and logical model in ...
    ... lexicon etc. The terms in the vocabularies are used to classify observations/interpretations, or to specify attribute values. Observations implement field data records and measurements i.e. the basis for classified features, interpretations and models. Any observed property can be expressed as a text ...

  • How active is recent tectonics in the central Balkans: Evidence from the Serbian Carpatho-Balkanides

    Ana Mladenović (2022)
    Since the Late Cretaceous, after closure of the Neotethys ocean, tectonic processes in the central Balkan Peninsula were mainly controlled by the mutual interaction of the Adriatic and the Eurasian plates, and tectonic units in-between. Most of the tectonic structures that have been active during Cenozoic times were inherited from previous tectonic stages under different tectonic regimes. Tectonic activity within the Carpatho-Balkan orogen in eastern Serbia since Miocene is conditioned by the existence of the rigid Moesian promontory east ...

  • The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass

    Dušan Berisavljević, Zoran Berisavljević, Svetlana Melentijević (2022)
    Construction of E75 highway section through Grdelica gorge was one of the most demanding projects realized in recent Serbian history. The alignment approximately 25 km long consists of several tens of bridges, two tunnels, three galleries and cuts with total length of 6 km. The alignment passes through highly anisotropic Palaeozoic schist rock formation of different weathering grades. This study focuses on shear strength properties of discontinuities, which are found to be the critical feature contributing to the occurrence ...
    Diskontinuitet, nelinearni kriterijum loma, anizotropija, hiperbolična anvelopa

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal ...
    ... similarity of municipal waste and soil, for the determination of unit weighh usually used laboratory and field tests are those that are common in geotechnical investigations such as: direc field measurements (excavation of exploration pit at the landfili with measurement of volume and weight of ...
    ... ion of basic parameters of physical state, laboratory and field tests which arec common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal ...

  • Geodynamics of basins above subducted slabs: An integrated modelling study of tectonics, sedimentation, and magmatism in the Timok Magmatic Complex

    Uros Stojadinovic, Marinko Toljic, Branislav Trivic, Radoje Pantovic, Danica Sreckovic-Batocanin, Nemanja Krstekanic, Bojan Kostic, Milos Velojic, Jelena Stefanovic, Nikola Randjelovic, Maja Males (2024)
    Timok Magmatic Complex, Neotethys subduction, basin geodynamics, analogue modelling

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... originating from the pre-project and feasibility study for opening and developing the “Field G” open pit (Idejni projekat sa studijom opravdanosti otvaranja i izgradnje površinskog kopa “Polje G”). Open pit "Field G" is currently not in function. Its opening, preliminary scheduled for 2015, will provide ...
    ... t, excavating and loading equipment, etc. The physical implementation of the OpmGIS geodatabase model has been illustrated by the example of the "Field G" open pit, followed by an outline of the way spatial-temporal data are handled, as well as by an example of visualization of spatial classes in ...
    ... software that can be adapted to the needs of one or more users, either on desktop computers or on servers, on the web or mobile devices used in the field. The GIS development platform used for the project outlined in this paper, but also for many other GIS projects developed at the University of Belgrade ...

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... between short-term and long-term interest and respect the interests of all parties. Figure 1 Phases of land reclamation Legal framework in the field of recultivation of degraded areas ... 29 2 TERMS - RECULTIVATION, RECLAMATION, RESTORATION, REVITALISATION Although the term reclamation appeared ...
    ... d coal mine, metal mine, petroleum and natural gas (including coal-bed gas), construction projects, and uranium mine). Legal framework in the field of recultivation of degraded areas ... 31 Further, Completion Standards on Land Reclamation Quality (CSLRQ) was issued in 2013 and are concentrated ...
    ... works, is regulated by several legal and by-laws, each of which, from its point of view, regulates this problem (Ivković at all, 2013). In the field of mining, the basis is the Law on Mining and geological research, which orders that mining companies that have acquired exploitation rights are obliged ...

  • Effects of external noise on threshold-induced correlations in ferromagnetic systems

    Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević (2021)
    Изингов модел, праг детекције, екстерни шум

  • Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites

    Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)
    To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...
    Perovskite/spinel ceramics, Multiferroic, Sintering, Influence of synthesis method