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Упит dcterms_subject_txt:working environment

453 items

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... number and arrangement of cracks and fissures. For the same rock, strength may be different, depending on physical characteristics. Heat of environment can affect structure of rock mass, which results in a change in uniaxial compressive strength of rock after fire. Uniaxial compressive strength ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... 2005b). The mode or form of occurrence of trace elements may control po­ tential hazardous effects to human health (FINKELMAN et al., 2002) and the environment. Numerous studies performed in SE Europe on Greek (CHATZIAPOSTOLOU et al., 2006; GENTZIS et al., 1996, 1997; GEORGAKOPOULOS, 2001; FILIPPIDIS et ...
    ... distribution in coal may characterize seams, deposits, and facies changes. It can be used as an indicator for the partial re­ construction of the environment conditions during peatification and coal formation (VASSILEV & VASSILEVA, 1996, 1998). 5.1. Affinity of the elements and geochemical associations ...
    ... higher ash contents in the bottom part of the coal seam III (samples 14/79–21/79; Fig. 3) imply that peat accumulation de­ veloped in a freshwater environment of a higher water level of the mire. Organic matter (OM) mainly originates from herbs and shrubs along with aquatic species with a small contribution ...

  • A bilingual digital library for academic and entrepreneurial knowledge management

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Dalibor Vorkapić (2015)
    A generic knowledge management process of organization, storage and retrieval of knowledge can suitably be fitted in a digital library. In the digital and knowledge age digital libraries can be used in knowledge management to handle intellectual assets and support knowledge creation. A multilingual digital library either stores content in more than one language or provides multilingual query access to monolingual content. In Serbia 18 of 308 scientific journals regularly published are bi-lingual, with papers simultaneously being in English ...
    Knowledge management, Digital library, Multilingualism, Language Resources, Terminology
    ... Ministry of Environmental Protection during the period 2004–2006, and is presently maintained by Ministry of Mining and Energy. Many institutions working with geological data are using GeolISS. 4http://rudonto.rgf.bg.ac.rs/ is the system of ontologies developed for the mining engineering and its ...
    ... Text preparation, alignment and generation of TMX documents are done within a special-purpose tool ACIDE (Aligned Corpora Integrated Development Environment) (Utvić et al., 2007). The TMX document consists of TU2 (Translation Unit) and TUV (Translation Unit Variant) elements, where each TUV is a segment ...
    ... 12/pdf/375_Paper.pdf. Stanković, R., Obradović, I., Kitanović, O., & Kolonja Lj. (2012b) Building Terminological Resources in an e-Learning Environment, in Proceedings of the Third International Conference on e-Learning, eLearning-2012, ed. D. Milošević, Belgrade Metropoloitan University, Belgrade ...

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method
    ... ash par- ticles have a spherical shape, dimensions of 0.074-0.005mm, are of low density, very mobile and can cause a number of problems in the environment. Slag is a mineral mixture that consists of ma- terial melted in the combustion process and other parts of non- combustible material. It falls ...
    ... landfills in Serbia occupy an area of 1639 ha and if they are under constant control and monitoring, significantly influence the dis- ruption of the environment, which is reflected in the pollution of: air, soil, surface water and groundwater, vegetation cover, as well as in the steady ecosystems disruption ...

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... problem identification and preliminary work of the late Predrag, Vulić, from the University of Belgrade, Faculty of Mining, and Geology, who started working; on the issue of arsenopyrite crystal structure. Conflicts of Interest: The authors declare no conflict of interest. References 1. · Vaughan ...
    ... ion incorporation into FeAsS structure and its environmental stability and oxidation mechanisms as a source of anthropogenic As release into the environment. Keywords: FeAsS; crystal structure; oxidation; XRPD; TEM 1. Introduction Arsenopyrite (FeAsS) is worldwide abundant natural sulphide, common ...

  • Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria

    Vladimir Krivošić, Luka Crnogorac, Rade Tokalić (2024)
    The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...
    utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijuma

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... indicate a microbial mat origin, probably related to Cyanobacteria (Ercegovac and Kostić, 2006) and a subareal and shallow-marine depositional environment. �e predominant maceral in the Gacko coal sample is atrinite (51%), followed by densinite (39%). Other mac- erals, present in the sample in only ...
    ... A., Oberauer, K., Kostić, A., Gratzer, R., Milisavljević, V., Aleksić, N., Stojanović, K., Groß, D. & Sachsenhofer, R. F., 2018. Depositional environment and hydrocarbon source po- tential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia). Organic Geochemistry, 115: 93–112. Behar ...
    ... Bechtel, A., Oberauer, K., Kosti¢, A., Gratzer, R., Milisavljevi¢, V., Aleksi¢, N., Stojanovic, K., Gro’, D. & Sachsenhofer, R. F, 2018. Depositional environment and hydrocarbon source po- tential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia). Organic Geochemistry, 115: 93-112. Behar ...

  • A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers

    Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić (2019)
    Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...
    Efikasnost, Fazi zaključivanje, Prikupljanje podataka, Buldozer

  • Дигиталне библиотеке у рударству и геологији са посебним освртом на представљање сиве литературе

    Биљана Лазић, Александра Томашевић, Михаило Шкорић (2019)
    Имајући у виду потребу за проналажењем информација похрањених у различитим облицима документације која се генерише у областима рударства и геологије на Рударско-геолошком факултету Универзитета у Београду, отпочет је процес развоја дигиталне библиотеке ROmeka@RGF, на платформи за приказивање дигиталних колекција - Омека. Значајан део документације представља такозвана сива литература која је претежно заступљена у виду вишетомне документацијe. Први савладани изазов представљало је повезивање различитих вишетомних делова пројектних извештаја у једну целину која би била лако доступна и претражива.
    дигиталне библиотеке, сива литература, Омека, језички ресурси, речници
    ... real-time and appropriate access to the project data. It is common that projects are stopped due to information lose in long-time period and unstable environment. The first challenge is to connect different multivolume parts in one consistent unit that is easily accessible and searchable. One more challenge ...

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...
    hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije
    ... different intelligent methods, but also their integration with conventional computer systems: database applications, spreadsheet applications, GIS environment, CAD/CAM, etc., with the ability to interchange data with different processes using different media. 3. A hybrid system for mine ventilation ...

  • Препреке декарбонизацији система даљинског грејања у Србији - ставови представника топлана

    Марија Живковић, Дејан Ивезић, Бобан Павловић, Дејан Стојановић (2024)
    Производња топлоте у системима даљинског грејања у Републици Србији тренутно се заснива искључиво на процесима сагоревања, с доминантним уделом природног гаса из увоза. Иако су технологије за коришћење обновљивих и алтернативних извора енергије добро познате, њихова примена у системима даљинског грејања у Републици Србији још увек је занемарљива (око 2%). Како би се убрзао и олакшао процес транзиције ка обновљивим изворима енергије и разумело тренутно стање и перспектива, спроведена је анкета међу представницима топлана Србији. Циљ је био ...
    системи даљинског грејања, препреке, обновљиви извори енергије, Србија

  • Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine

    Lazar M. Kaluđerović (2018-01-17)
    fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...
    adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon
    ... Science of the Total Environment, 141: 223–240. Kozak J., Valla M., Prokopec O., Vacek O. 1992. Prediction of the role of soil organic matter and some other soil characteristics in herbicide adsorption. In: Kubat, J. (Eds.), Humus, Its Structure and Role in Agriculture and Environment. Elsevier, Amsterdam ...
    ... creates an opportunity for application of these substrates as potentially useful material for removal of S-metolachlor and clomazone from the environment. Keywords: adsorption, montmorillonite, hexadecyltrimethylammonium bromide, phenyltrimethylammonium chloride, S-metolachlor, clomazone ...
    ... 43(2): 255–256. Gunasekara A. S, de la Cruz I. D. P., Curtis M. J., Claassen V. P., Tjeerdema R. S. 2009.The behavior of clomazone in the soil environment. Pest Management Science, 65: 711–716. He H. P., Ray F. L., Zhu J. X., 2004. Infrared study of HDTMA+ intercalated montmorillonite. Spectrochimica ...

  • Modeliranje sistema upravljanja zaštitom životne sredine u rudarsko-energetskim kompleksima

    Jelena R. Malenović - Nikolić (2016-07-12)
    Efikasnost funkcionisanja sistema upravljanja zaštitom životne sredine u rudarskoenergetskimkompleksima zavisi od stepena sprovođenja usvojene politike zaštiteživotne sredine i primene preventivnih mera zaštite životne sredine. Nedostatakfinansijskih sredstava za unapređivanje tehnologije eksploatacije, transporta, pripreme iprerade energetskih mineralnih sirovina u našim rudarsko-energetskim kompleksima,negativno utiče na ostvarivanje ciljeva zaštite životne sredine, a posledice radnihaktivnosti rudarsko-energetskih kompleksa dovode do smanjenja nivoa kvalitetavazduha, vode i zemljišta...
    rudarsko-energetski kompleks, životna sredina, sistem upravljanja,višekriterijumsko odlučivanje, modeliranje
    ... University, Working Paper 10-074, http://www.hbs.edu/ faculty/ Publication%20Files/10-074.pdf 220. Figge,F., Hahn, T., Schalteggwr, S., Wagner, M., The Sustainability Balanced Scorecard – Linking Sustainability Management to Business Strategy, Business Strategy and the Environment 11, pp. 269- ...
    ... state of the environment, and to propose one of the possible way of resolving a variety of environmental issues. The practical contribution of this research involves a developed EMS model based on modern management methods. Key words: mining and energy complex, environment, management system ...
    ... Belgium, 2005 23. Pesch, U., Huitema, D., Hisschemöller, .M, "A boundary organization and its changing environment: the Netherlands Environmental Assessment Agency, the MNP" Environment and Planning C: Government and Policy 30(3), 2012, pp. 487–503 24. Pearson Pearson, R., Using the International ...

  • Navigacija budućnosti: poslovni rizici i prilike u rudarskoj industriji

    Petar Marković, Dejan Stevanović, Mirjana Banković, Vuk Lazić (2024)
    Sektor rudarstva i metalurgije se globalno suočava sa brzo evoluirajućim okruženjem u 2024. godini, koje karakteriše jedinstvena međusobna zavisnost rizika i prilika. Sektor je u središtu globalne energetske tranzicije, uz rastuću potražnju za kritičnim mineralnim sirovinama poput litijuma, nikla i bakra, koji su od suštinskog značaja za tehnologije obnovljive energije i električna vozila. Međutim, ova sve veća odgovornost donosi brojne izazove, uključujući pojačanu pažnju na ekološke, društvene i upravljačke (ESG) faktore, fizičke i tranzicione rizike uzrokovane klimatskim promenama, i ...

  • Управљање отпадом – услови, циљеви и изазови на домаћем тржишту

    Дарко Драгићевић (2024)
    Тема овог завршног рада обухвата анализу система управљања отпадом на домаћем тржишту, са посебним освртом на постојеће изазове и могућности за унапређење. Управљање отпадом је кључна компонента заштите животне средине и одрживог развоја, док у Србији ова област пролази кроз процес трансформације у складу са захтевима Европске уније и међународним стандардима. Овај завршни рад је пружио боље разумевање сложености управљања отпадом у Србији и понудио практична решења која могу помоћи у остваривању одрживог развоја у овој области.
    Заштита животне средине, управљање отпадом, комунални отпад, рециклажа
    ... 35 o/n 29. anpvana 2023 “ Report of the World Commission on Environment and Development: Our Common Future 5 Hariss, J., 2020. Basic Principles of Sustainable Development, Working Paper No. 00-04, Global Development and Environment Institute, Tufts University 3 ynpaBJbabbe ornaj[oM. MebyTuM ...
    ... https://evreka.co/blog/the-future-of- waste-management/ Hariss, J., 2020. Basic Principles of Sustainable Development, Working Paper No. 00-04, Global Development and Environment Institute, Tufts University 3A4KOH o ynpas;batby omnaoow „,Cnyotc6enu 2onacHuk PC”, op. 36 oJ 15. Maja 2009, 88 oJ 23 ...
    ... (bakyanrer, Humi. IIEHITIEBHPB, /I., 2022. Ynpasate omnaOow, IIpuapojHo - MaTeMaTHuKH daky-reT, Bapa JIyka. Report of the World Commission on Environment and Development: Our Common Future. Republic of Serbia Ministry of Environmental Protection, 2020. Roadmap for a Circular Economy in Serbia ...

  • Why classical sequence stratigraphy doesn't work in Pannonian basin?

    Dejan Radivojević (2018)
    basen iza ostrvskog luka, detačment, miocen, Panonski basen, riftogeneza, sekvenciona stratigrafija
    ...  moment of  initial rifting  in certain graben. Essentially  it represents  initial  rifting  systems  tract  formed  in  continental/alluvial  environment  (Prosser,  1993).  From  those  reasons, in case that rifting process started in moment when area was already flooded this systems tract  is ve ...

  • Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia

    Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)
    The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...
    tecišta, zadržavanje nanosa, RAMMS, validacija

  • Energetska efikasnost elektromotora na površinskim kopovima

    Snežana Aleksandrović, Ilija Jeftenić (2023)