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Упит dcterms_subject_txt:Utilization and Storage

2416 items

  • The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA

    Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski (2017)
    Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...
    Pd(II), Selen, Substitucija, Kinetika, Mehanizam
    ... on Bruker DPX 200 and AV 300 devices. Chemical shifts (d) are reported in ppm and referenced to tetramethylsilane. Coupling constants (J) are reported in Hertz (Hz) and splitting patterns are indicated as s (singlet), d (doublet), t (triplet), sept (septet), bs (broad signal) and m (multiplet). Elemental ...
    ... of the largest steric hindrance of the ligand L3 in which selenium is bound directly to two rigid and bulky systems (phenyl and oxane rings) opposite to phenyl and methylene groups in complexes 1 and 2. Furthermore, the fact that the reactivity of the studied com- plexes was strongly influenced by ...
    ... L-His, L-Cys, GSH and 50-GMP) was studied under pseudo first-order conditions as a function of nucleophile con- centration and temperature using stopped-flow technique. The results for the studied complexes indicate that the complex 1 reacts faster compared to the complexes 2 and 3, which is caused ...

  • Creation of a Training Dataset for Question-Answering Models in Serbian

    Ranka Stanković, Jovana Rađenović, Maja Ristić, Dragan Stankov (2024)
    Razvoj i primena veštačke inteligencije u jezičkim tehnologijama značajno su napredovali poslednjih godina, posebno u domenu zadatka odgovaranja na pitanja (Question Answering - QA). Dok su postojeći resursi za QA zadatke razvijeni za glavne svetske jezike, srpski jezik je relativno zanemaren u ovoj oblasti. Ovaj rad predstavlja inicijativu za kreiranje obimnog i raznovrsnog skupa podataka za obučavanje modela za odgovaranje na pitanja na srpskom jeziku, koji će doprineti unapređenju jezičkih tehnologija za srpski jezik. Pored brojnih istraživanja o jezičkim modelima ...
    veštačka inteligencija, obrada prirodnog jezika, jezički resursi, anotirani skupovi, ekstrakcija informacija, odgovaranje na pitanja

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)

  • 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

  • Groundwater as an important resources in emergency situations of the Republic of Serbia

    Boris Vakanjac, Radoje Banković, Vesna Ristić-Vakanjac, Saša Milanović, Ljiljana Vasić, Saša Bakrač, Nikola Kozić (2024)
    Groundwater is a renewable resource wholly or partially protected from external influences (pollutants) by nature. Currently, about 75% of the population of the Republic of Serbia meets its water needs by using underground water. Hence, this water represents an essential strategic resource of our country; according to data from the Water Management Foundation of the Republic of Serbia (VOS, 2001), water from existing sources is used in quantities of about 23 m3/s. As 67.13 m3/s is the estimated potential ...
    podzemne vode, izvor, monitoring, vanredna situacija

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)

  • Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić, (2019)
    ... variations in the basement (gb) and of the first (gm1) and sixth (gm6) model, c) density contrast of the basement blocks for the first (b1) and sixth (b6) model and d) lateral density distribution of the basement along the profile after first (b1) and sixth iteration (b6). Procedure ...
    ... effect of the Cenozoic sediments and homogenous basement was calculated using 2D modeling and then removed from the total gravity anomaly. Depth-to-basement data (Pigott and Radivojević, 2010) were used to model the lateral extension of deeper layers of sediments and the shape of the basement. The total ...
    ... IGNJATOVIĆ1 and Dragana Đurić1 1University of Belgrade - Faculty of Mining and Geology, Đušina 7, Belgrade, Serbia; ivana.vasiljevic@rgf.bg.ac.rs Introduction Lateral density variations in the sedimentary basin basement can be calculated using gravity anomaly, depth-to- basement data and density ...

  • Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia

    Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Jovanović (2018)

  • From post-disaster landslides inventory to open landslides data

    Biljana Abolmasov, Miloš Marjanović, Uroš Đurić, Jelka Krušić (2021)
    ... Geological and geomorphological settings are very complex as well as other environmental conditions in such a wide area. Thus, attention was focused on developing a fast and efficient methodology for a post-event landslide inventory. Very High and High resolution Pléiades, SPOT6 and WorldView2 ...
    ... Mining and Geology, Serbia, biljana.abolmasov@rgf.bg.ac.rs 2University of Belgrade, Faculty of Mining and Geology, Serbia, milos.marjanovic@rgf.bg.ac.rs 3University of Belgrade, Faculty of Civil Engineering, Serbia. udjuric@grf.bg.ac.rs 4University of Belgrade, Faculty of Mining and Geology ...
    ... assessment and management in the affected territory. This paper is presented basic results and main project deliverables. Methodology Study area covered 11.840 km2, i.e. 24 most vulnerable municipalities affected by different type of landslides triggered by Cyclone Tamara in Western and Central ...

  • Analysis and visualization of geophysical well-logging data from closely spaced boreholes

    Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov (2024)
    Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...
    well-logging in karst, water loss, data correlation, data fusion
    ... opportunity for a new approach to analysis and visualization that differs from the standard logging data processing. Numerical interpolation and correlation of data from various logging measurements (short-normal and long-normal resistivity, spontaneous potential and gamma ray logging), proved to be a ...
    ... s of karst in terms of surface and underground water circulation, as well as stability and hazard assessment for large objects such as dams (Sretković and Vučković, 2020). 'The use of geophysical characterization of karst systems can provide an economical and non-invasive alternative _ for ...
    ... for a new approach to analysis and visualization that differs from the standard logging data · processing. Numerical interpolation and correlation of data from various logging: measurements (short-normal and long-normal rresistivity, | spontaneous potential and gamma ray logging), proved to ...

  • Analysis of the exhaust emissions inventory from auxiliary mining machines

    Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)
    Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...
    emissions, mining, auxiliary machines

  • Effectiveness Analysis of Different Bucket-wheel Excavators

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić (2021)
    Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...
    bucket-wheel excavator, open-pit coal mine, mining, multi-criteria decision methods
    ... capacity utilization. Maintenance parameters are average electrical and mechanical downtime, average services, average overhauls, and technical availability. After defining and calculating all the parameters, Multi-Criteria Decision Methods (MCDM) are applied. In the first interaction, the AHP (Analytical ...
    ... group. Parameters are average production (P1), average operating time (P2), time utilization (P3), capacity utilization (P4), average electrical and mechanical downtime (P5), average services (P6), average overhauls (P7), and technical availability (P8). Based on this unique group of parameters, the AHP ...
    ... the equation (9) and (10) values of ideal (A+) and anti- ideal (A-) solution. By using equations (11) and (12) the distance of each alternative from the ideal solution (Si +, Si) is calculated. The values of (A+) and (A-) are presented in Table 8, and in Table 9 are values of (Si +) and (Si -). Table ...

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... of kilograms per a drillhol and blasting with dozens and even hundreds of tonnes of an explosive are being apllied in the world nowdays. Such large quantities of an explosive can cause seismic shocks with the intensity that can have hazardous impact on the environment and result in moving of buildings ...
    ... monitoring site r , reduced to the total quantity of the explosive Q i.e., R =%č. Parameters K and m are conditioned by } v characteristics of the rock mass and blasting conditions. Thus, V is a decreasing and convex function of the variable R. By applying the equation of rock mass oscillation while ...
    ... MASS OSCILLATION EQUATION In the Equation (1) tvo parameters appear, K and m, which need to be determined for a specific work environment and specific blasting: conditions. It is possible to determine the parameters K and n in many ways, 1.e., models, using the values obtained by experimental ...

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија

  • Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia

    Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić (2022)
    The paper compares the flow regimes of the Resava River at the gauging stations of the Manasija Monastery (upper course) and the town of Svilajnac (lower course). The hydrological analysis encompasses a multiyear period of monitoring (1982–2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km2) and the Manasija Monastery station (358k m2), considering the overall monitoring period and characteristic years. The results indicate that the specific runoff in ...
    hydrogeological characteristics, water regime, water balance, karst aquifer, Resava catchment area
    ... Manasija Monastery and Qav = 4.35 m#/s at Svilajnac) and 2018 (Qav = 4.06 m?*/s at Manasija Monastery and Qav = 4.65 m?*/s at Svilajnac (Figs. 1a, 1b); • The ycar 1994 with a typical low discharge: Qav = 0.58 m*/s (at the Mansija Monastery) and 0.33 m?*/s (at Svilajnac) (Fig. 1c); and • The year 1999 ...
    ... Monastery (upper course) and the town of Svilajnac (lower course). The ydrological analysis encompasses a multiyear period of monitoring (1982—2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km?) and the Manasija Monastery station ...
    ... Kamen, and Vrtačelje (Avramović, 2005). Hydrogeological characteristics of the Resava catchment Based on the lithostratigraphic units and structur- al porosity, there are threc types of aquifers in the study arca. https://bgd.bg/review-bgs 1. Intergranular aquifers in the central and western ...

  • Comparative analysis of karst water quality parameters of the Banja spring near Valjevo (Republic of Serbia)

    Jovana Lončar, Jovana Mladenović, Vesna Ristić Vakanjac, Veljko Marinović, Branislav Petrović, Petar Vojnović, Radisav Golubović (2024)
    The monitoring of karst spring release regimes is becoming more and more relevant due to the fact that karst waters are of exceptional quality and most often it is only necessary to chlorinate these waters in order to use them for water supply. In addition to monitoring the discharge regime, it is certainly necessary to establish monitoring of quality parameters that are generally observed sporadically (seasonally or monthly). An example of a well-designed monitoring of quantitative and qualitative parameters ...
    pH, Ec, mutnoća, isticanje, karstno vrelo

  • History of the development of the hydrodynamic model of the open pit mine “Drmno”, Serbia

    Dušan Polomčić, Jelena Ratković, Vesna Ristić Vakanjac (2023)
    With the creation of a hydrodynamic model, the need for it usually ceases until some next moment when the model needs to be updated and used for the set task for the necessary project documentation or dedicated studies. It is relatively rare that almost every year the model is improved and used for forecast calculations. The paper presents the basic characteristics and development of the hydrodynamic model of the open pit mine “Drmno” for 25 years. This open pit ...
    hidrodinamički model, površinski kop, rekalibracioni model, drenažni sistem

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction