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Упит dcterms_subject_txt:Sustainability and the Environment

2800 items

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... taken from the LOM standard, suggest the auditorium the resource is intended for, the environment for learning, estimated duration of the course and degree of interactivity. Interactivity level indicates the degree to which the learner can influence the aspect or behaviour of the resource ...
    ... practice and the like. As these resources need to bediscoverable, accessible and shared by potential learners across the learning environment, it is very important that they are well described and tagged in a standard way in machine readable form by metadata. Only then can they be successfullyused and reused ...
    ... specification, the standard nomenclature was used, enabling learning resources to be described and shared in a common way, and thusenhancingtheir portals. The need for metadata OER need to be shared, accessible and discoverable by potential users across the learning environment. They should ...

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... aspects, ensuring of a safe and healthy work environment, and the possibility of sustainable ore extraction. An inadequate technology and its parameters can considerably reduce the benefits of mining.,, as well as bear upon economic viability and safety, which is one of the important criteria for decision ...
    ... that need to be examined. On the one hand, this includes excavation costs, extractable ore reserves, and ore depletion during; the course of mining. On the other hand, a safe mining: technology and a healthy work environment need to be ensured for miners. The paper describes a model used to ...
    ... alternative [13*14]. Results. The following criteria were considered in the case of the L-29 C bauxite deposit at Bešpelj Mine: Ki – operating expenses, Ko – safe and healthy work environment, Ky - extractable ore reserves, and K+ — coefficient of ore de- pletion. The considered mining: technology ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... metals in the sediments To exemplify the distribution and levels of sediment contamination by heavy metals in the Sava and Danube Rivers, the metals As, Cd, Cr, Cu, V, Pb, Ni and Zn were selected for analyses due to their abundance and toxic effects in the environment of highly industrialized and urbanized ...
    ... OF SAVA AND DANUBE 1179 three samples (the Sava – Makiš, the Sava – near confluence and the Danube – Vinča). Lindane (the γ-isomer of 1,2,3,4,5,6-hexachlorocyclohexane) was pro- duced industrially until the late 1980s when it was banned, but it can still be detected in the environment, as was case ...
    ... indicated contamination. Hence, a risk for the aquatic environment has to be assumed, but an intervention is not required. With respect to the Cu content, the Danube sediments at the location Vinča and the Sava sediments at the location Kapetanija slightly exceeded the target values (36 mg kg–1), but all ...

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... features of the UCG The commercial sustainability of the UCG process will primarily depend on geolog- ical constraints. The UCG with the obligation to separate CO, from the gas mixture of UCG, and its possible storage carbon capture and storage, depends on the technological development of the separation ...
    ... cost of the final product (normalized to 1 MJ of energy), — there is no significant degradation of the terrain, since all the non-combustible substances (slag or ash) remain in the deposits bencath the surface of the earth, — there is no substantial pollution of the environment and the working ...
    ... with the alm of making rational use of this significant and relatively inexpensive energy source, while at the same time reducing its nega– tive impact on the environment. Coal in the global thermal energy balance participates close to 80%. Fossil fuels (solid, liquid and gaseous) are involved ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... influence on the environment. It belongs to the Besna Kobila metallographic region (1823 m) and it is located in the southeast of Serbia, near the town Vranje (Figure 1). In the Grot mine, the exploitation and processing (flotation) of lead-zinc ore is carried out. Production of ore in the Grot mine is ...
    ... economy, strict rules and laws have caused high control of the level of waste materials being released into the environment, and consequently, due to applying adequate techniques for waste purification, the influence of industry on the environment is usually very small or negligible. On the other hand, in ...
    ... economy, strict rules and laws have caused high control of the level of waste materials being released into the environment, and consequently, due to applying adequate techniques for waste purification, the influence of industry on the environment is usually very small or negligible. On the other hand, in ...

  • Depth estimation of archeological objects using Euler 3D deconvolution of magnetic data

    Vesna Cvetkov, Ilija Vasiljević, Mirko Petković (2015)

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... according to a number of criteria. The result of such an expert analysis is an estimate of the validity and effectiveness of the ventilation system followed by suggestions for its improvement. The architecture of the system and the software environment in which the system was developed enable a dynamic ...
    ... analysis phase. The task of visual modeling of the system is to define the objects and logic of the real system using the adopted graphic notation. In view of the fact that SimVent was developed in Visual Studio 6.0 programming environment, the package was presented through UML notation in the form of t ...
    ... constructing and using applications by means of a high-level graphical environment which generates standard C code. In the KAPPA-PC system, the components of the domain are represented by objects that can be either classes or instances within classes (Fig.9). The relationships among the objects in a ...

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... according to a number of criteria. The result of such an expert analysis is an estimate of the validity and effectiveness of the ventilation system followed by suggestions for its improvement. The architecture of the system and the software environment in which the system was developed enable a dynamic ...
    ... analysis phase. The task of visual modeling of the system is to define the objects and logic of the real system using the adopted graphic notation. In view of the fact that SimVent was developed in Visual Studio 6.0 programming environment, the package was presented through UML notation in the form of t ...
    ... constructing and using applications by means of a high-level graphical environment which generates standard C code. In the KAPPA-PC system, the components of the domain are represented by objects that can be either classes or instances within classes (Fig.9). The relationships among the objects in a ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... performed experimental investigations on copper ore [17]. The basic physical and mechanical properties of the rock mass were determined on samples in the laboratory. By examining the physical and mechanical properties of the work environment, the following values were obtained: • compressive strength ...
    ... Sadovskii’s equation defines the alteration in the velocity of rock mass oscillation depending on the distance, the quantity of explosives, blasting conditions and geological characteristics of the rock mass, and it is determined based on trial blasting for a specific work environment. Thus, this paper offers ...
    ... addition to the seismic ones, those of air blast waves, fly rock, etc. Thus, production efficiency is increased and, at the same time, construction and mining facilities, as well as the environment near the blast site are protected. 2. Recording Rock Mass Oscillation Velocity Intensity of the shock is ...

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... Difference Groundwater Modelling and Comparison of the Results with Those Obtained Using Finite element modelling approach. In: RAPANTOVA, N. and HRKAL, Z. (eds.) Proceedings of the 10th International Mine Water Association Congress: Mine Water and the Environment. Ostrava, Czech Republic, 2008. ...
    ... A. (1993) A phased approach to mine dewatering. Mine Water and Environment, 12 (1), pp. 27-33. NIEDBALSKA, K. et al. (2011) Modelling of changes of hydrodynamic conditions in the aquatic environment of the Maczki-Bór sand pit due to the fact of planned closure of mining operations (NE part of Upper ...
    ... River and its tributaries: the Tamnava (left) and the Peštan (right). Tamnava – West Field falls within the municipalities of Lajkovac and Ub, near the villages of Kalenić, Mali Borak, Radljevo and Skobalj. To the west and south, the mine borders on the exploratory field Radljevo, and to the east on ...

  • Modeling and Monitoring of Karst System as a Base for its Evaluation and Utilization - a Case Study from Eastern Serbia

    Milanović Saša, Stevanović Zoran, Vasić Ljiljana, Ristić-Vakanjac Vesna (2011)

  • Процјена хазарда и ризика од клизишта за различите нивое просторног планирања у Републици Српској, БиХ

    Цвјетко С. Сандић (2022)
    Територија Републике Српске је у посљедних десетак година веома угрожена активирањем нових и реактивирањем старих клизишта. Она својим дјеловањем наносе огромне материјалне штете, па и људске жртве, те је неопходно озбиљније третирање и дјеловање у борби са овим природним хазардом. Чест проблем јесте одговорност, тј. надлежност институција из ове области и недостатак у законској регулативи која готово никако или само површно обрађује област хазарда и ризика од клизишта. Усљед непостојања праксе и усвојених методологија које су у примјени у свијету, циљ ...
    Kлизишта, склоност, хазард, ризик, процјена, просторно планирање, угроженост

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... chromosomes in the population aiming to choose these, which will take part in the reproduction process. The selection occurs with a given probability on the base of fitness functions. The fitness function plays a role of the environment to distinguish between good and bad solutions. The recombination ...
    ... (1) In this formulation x is the n-dimensional vector of SBP and UMCP coordinates, while xL and xU are the n-dimensional vectors representing the lower and upper bounds of the coordinates, i.e. the design space. The optimisation goal is to minimize the objective function f(x) subject to a ...
    ... points in the search space of the constrained optimisation problems, feasible points which satisfy all constraints and unfeasible points which violate at least one of the constraints. At the feasible points, the penalty function value is equal the value of objective function, but at the infeasible ...

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • 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
    ...  depositional environment, hydrocarbon  reservoirs, Miocene, post‐rift, sequ‐ ence stratigraphy.    INTRODUCTION    Based on  the correlation applied so  far, oil and gas  reservoirs of  the “Mokrin”  field  represent  individual sandstone  layers. The correlation  is based on similarity  in the shape o ...
    ...  based on the analysis  of the shape and characteristics of curves of gamma ray  (GR) and specific resistivity  (RT)  logs.   Funnel  shape of  the GR  log points  to  the  reduction  in  the basin water  level and  the  increase  in  the  level of  depositional energy, which leads to the reduction  ...
    ... n the content of shale and increase in the content of  sand in the formation.  Bell shape of the GR log follows the trend of grain tapering out upwards, pointing  to the reduction in the level of depositional energy.  Cylindrical shape of the GR log occurs against sand  layers  deposited  in  the  e ...

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... teacher assistants (TA) and publish their own educational materials on the platform. As for the entrepreneurial environment, the TEL platform’s backend control panel provides similar opportunities for tracking the progress of graduate students who started to work in companies and are now involved in ...
    ... Object-Oriented Dynamic Learning Environment), a free software e-learning platform, conceived by Martin Dougiamas, who is still the lead developer of the Moodle.Org community. Moodle helps educators to create online courses and fosters interaction within the teacher-student community, especially ...
    ... special attention is given to its language support system (LSS). The main goal of LSS is to sustain expert terminology in a multilingual environment and enhance multilingual communication between academic institutions and enterprises. 5 http://www ...

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin

    Filip Anđelković, Dejan Radivojević (2019)
    gornji miocen, litostratigrafske jedinice, formacije, Panonski basen
    ... difficult. According to this, the first name is the Hungarian one, then the Serbian one, and after that the Croatian one. Furthermore, the depositional environment is indicated after the name. 1.Endrőd – Hetin – Medvedski Breg: hemipelagic lacustrine environment 2. Szolnok – Majdan – Andraševec ...
    ... foreland: geology and hydrocarbon resources. AAPG Memoir. 84, pp 619-632 7. Mațenco, L., & Radivojević, D., (2012). On the formation and evolution of the Pannonian Basin: constraints derived from the structure of the junction area between the Carpathians and the Dinarides. Tectonics. 31, TC6007 8 ...
    ... on the level of formations and members and are characterized by their lithological concent, depositional environments, using field and borehole data, and geophysical methods (reflection seismics and geophysical well-logging). Such correlation has great significance for the knowledge of the Pannonian ...