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292 items

  • Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja

    Jovana M. Janković Pantić (2022)
    Odlaganje otpada na komunalne deponije predstavlja osnovni način zbrinjavanja otpada u Srbiji. Kako bi se prostor za deponovanje materijala racionalno koristio potrebno ga je svakodnevno zbijati sa unapred definisanom količinom vode koja se dodaje. Dobro zbijeni komunalni otpad zauzima manju zapreminu i omogućuje sigurnije skladištenje, pa je korisno prethodno laboratorijski odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). U Srbiji do sada nisu određivani parametri zbijanja, dok je u svetu primenjivana standardna metoda (Proktorov opit) ...
    komunalna deponija, zbijanje, Proktorov opit, malj sa šiljcima, koeficijent razaranja

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... eu/ http://www.onegeology.org/ http://pubs.usgs.gov/of/2007/1285/pdf/Richard.pdf Struik, L.C. Quat, M.B. Davenport, P.H. and Okulitch, A.V. (2002): Multi-hierarchical rock classification for use with thematic computer-based query systems, a preliminary scheme. Geological Survey of Canada, Current ...
    ... MAPPING TECHNIQUES ‘06, 47-59, http://pubs.usgs.gov/of/2007/1285/pdf/Richard.pdf Struik, L.C. Quat, M.B. Davenport, P.H. and Okulitch, A.V. (2002): Multi-hierarchical rock classification for use with thematic computer-based query systems, a preliminary scheme. Geological Survey of Canada, Current Research ...
    ... свака јединица добила је нови јединствени ID као и нови опис литологије и старости. Слика 5: Пример генерализације јединица Fig5 : Example of unit generalization На слици 4 лево су приказане геолошке јединице изворне карте 1:500000, а десно је нова, генерисана карта 1:1М након урађене генерализације ...

  • 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
    ... of �0-K3YbSi2O7 is only slightly different from the hexagonal P63/mmc model. It possesses an almost ideal orthohexagonal unit cell with an a/b ratio of 31/2. The asymmetric unit contains two potassium, one ytterbium, one silicon and three unique oxygen sites. The structural phase transition is ch ...
    ... group is connected to six different Yb3+ cations. The temperature dependence of the unit-cell parameters and selected structural parameters are presented in the supplementary figures S1–S3. The plot of the unit-cell para- meters as a function of temperature shows a more pronounced change of the ...
    ... structure of f’-K;YbSi,O7 is only slightly different from the hexagonal P63/mmc model. It possesses an almost ideal orthohexagonal unit cell with an a/b ratio of 3'”. The asymmetric unit contains two potassium, one ytterbium, one silicon and three unique oxygen sites. The structural phase transition is characterized ...

  • Pokazatelji recentne tektonske aktivnosti u speleološkim objektima Dževrinske grede (istočna Srbija)

    Ana Mladenović, Jelena Ćalić (2022)
    Sistem Timočkog raseda predstavljen je sistemom desnih transkurentnih raseda generalnog pružanja sever – jug, koji su bili aktivni u periodu oligocena i miocena u okviru Karpato-balkanskog orogena. Početak njihove aktivnosti vezuje se za rotaciju tektonskih jedinica Karpato-balkanida (Dacia Mega Unit) oko rigidne Mezijske jedinice. Aktivnost ovih transkurentnih raseda je akomodirala ovu rotaciju, pa se smatra da je kumulativno kretanje duž Timočkog raseda tokom perioda njegove aktivnosti bilo do 100 km. Usled kompleksnih tektonskih rotacija, rasedi ovog sistema doveli su ...
    Тимочки расед, Џеврински расед, Балта расед, спелеолошки објекат

  • A necessary and sufficient condition for an algebraic integer to be a Salem number

    Dragan Stankov (2019)
    We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... night period. Unit 2-Čantavir west (30 wind turbines) 0 Unit 3-Žednik north (22 wind turbines) L /−2 / V / P In unit 3 it is expected that the LVNI will be exceeded by 3.5 dB in the night period as a consequence of the work of wind turbines marked: VG48, VG51 and VG113 Unit 4-Žednik south ...
    ... 14, 6174 4 of 15 1. Unit 1—forms part of the wind farm northeast of the Čantavir settlement, within which 46 wind turbines are planned; 2. Unit 2—forms part of the wind farm southwest of the Čantavir settlement, within which 30 wind turbines are planned; 3. Unit 3—forms part of the wind farm ...
    ... is both possible and desirable to have a combined technical and planning approach in SEA, i.e., the application of a semi-quantitative method of multi- criteria evaluation [54]. This atypicality in the methodological approach, based on a combination of different methodological procedures, techniques ...

  • Paleomagnetic study of Jurassic-Early Cretaceus sediments in the Danibicum of Eastern Serbia

    Vesna Cvetkov, Emo Marton, Vesna Lesić, Dragana Tomić (2015)
    ... Danubicum, Eastern Serbia The Danubicum extends from South Carpathians (Romania) southward in Eastern Serbia and continues in western Bulgaria. This unit is composed of Arjana, Coşuştea, Upper and Lower Danubian thrust complexes. Our area of investigation belongs to the Upper Danubian on the Serbian ...
    ... Republic, pp. 27-28 (Abstract). 3. Panaiotu, C. G., Panaiotu, C. E., Lazar, I. (2012): Remagnetization of Upper Jurassic limestones from the Danubian Unit (Southern Carpatians, Romania): tectonic implications.- Geologica Carpathica, 63/6, 453-461, Bratislava. ...

  • Business Models for Small-scale Biomass Projects Development

    Dejan Ivezić, Miodrag Gluščević, Marija Živković (2019)
    Biomass is recognized as the most promising renewable energy source in Serbia. The share of biomass in Serbian final energy consumption is over 10%, but mostly related to traditional use in stoves and ovens. One of the main obstacles for wider implementation of contemporary biomass facilities is the inexperience of consumers and stakeholders in the implementation of “innovative” business models, especially in the cases of small-scale projects. In this paper, three different business models (public utility company, energy cooperative ...
    ... self-government unit recognizes the environmental significance, as well as the economic and social potential of the biomass project in some of the local communities, but lacks sufficient financial, technical and human capacities to implement such a project, local self-government unit could implement ...
    ... more ambitious project of introduction of district heating system must be realized. District heating system would include all public buildings, all multi storey buildings for collective housing, and potentially it could include single-family houses. Realization of this project requires a high level of ...
    ... implement the procurement procedure to get private partner (ESCO company) for project implementation. Thereafter, the local self-government unit concludes a public-private partnership contract for project implementation with selected ESCO company. The selected ESCO company then implements a project under agreed ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... is being carried out, i.e. technical preparation services of the pits’ mechanical and electrical maintenance units, and the central maintenance unit. For the purpose of easier management of data on equipment, a catalogue of equipment components has been made, containing prototypes of the hi ...
    ... energy installations, dumps, locations where data have been taken from, shifts, etc.). Respective jobs and operations are defined for each production unit, followed by locations where they are carried out. The following types of information are considered: produced quantities of coal per assortments ...
    ... aggregation of data. This can involve simple roll-ups or complex grouping involving interrelated data. For example, production by each production unit can be rolled up to production by type of equipment and further can be rolled up to open pit, or the whole mine, aggregated for specified period ...

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... Allochthon . [__] Palaeogene sedimentary () secton studied Fig. 1. — main overthrusts —— other overthrusts and faults B Bobrowiec Unit S-H Suchy Wierch-Havran Unit <-HC section studied by Polak ef al., 1998 Geological sketch map ofthe Tatra Mountains (after Bac-Moszaszwili ef a/. 1979; Nemčok ...
    ... Gradzinski ef al., 2004; Jach, 2005; Plašienka, 2012). The formation of horsts (Bobrowiec Unit and the Gladkie Uplazianskie Thrust Slice in the Western Tatra Mountains) and grabens (the Suchy Wierch—-Havran Unit in the High Tatra and Belianske Tatra Mountains) led to distinct facies changes (Guzik ...
    ... to a new formal unit, the Jasenina Formation (Michalik ef a/., 1990; Grabowski and Pszczotkowski, 2006). Polak ef a/. (1998) redefined the previously recognized Sokolica Radiolarite Formation and Czajakowa Radiolarite Formation and proposed the Ždiar Formation as a new unit, comprising. thce ...

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... block and Kopaonik Block and Ridge unit sensu Karamata (2006), or in other words to the West Vardar and Jadar–Kopaonik units sensu Schmid et al. (2008). Only a single locality (Cretaceous limestone at locality No. 8, see Fig. 2) is located in the East Vardar unit. The early geological and tectonic ...
    ... ed units (e.g. the Jadar– Kopaonik unit) in the Latest Jurassic-Earliest Cretaceous (Gawlick et al. 2017 and references therein), (3) sedimen- tation of shallow, followed by deeper water carbonates and flysch onto the ophiolites and/or the Jadar–Kopaonik unit, starting in the Cretaceous and ending ...
    ... the Jadar– Kopaonik unit and can be subdivided into a western (Studenica) and eastern (Kopaonik) thrust sheet (Fig. 3). These thrust sheets are tectonically overlain by ophiolitic mélange of Middle (?)-Late Jurassic age and obducted Jurassic ophiolites of the West Vardar unit (Dimitrijević 1997; ...

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...
    Proizvodnja električne energije, Obnovljivi izvori energije, Višekriterijumsko odlučivanje, Srbija
    ... 2023-11-02 12:19:33 A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia Boban Pavlović, Dejan Ivezić, Marija Živković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] A multi-criteria approach ...
    ... Keywords: Electricity generation Renewable energy sources Multi-criteria decision analysis Serbia a b s t r a c t When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, e ...
    ... and prioritizing, such as the multi-criteria assessments of different energy issues. Despite the limitations of a one-country model, which should be kept in mind when considering the on-going increasing role of cross-border exchanges in the electricity sector, the multi- criteria approach can still provide ...

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...

  • Linear-motor plunger pump increases lifting efficiency

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

  • Structural and microstructural study of brookite based TiO2 nanocomposites with carbon black (C)

    Aleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Maja Šćepanović (2022)
    Structural and microstructural properties of TiO2-based nanocomposites with carbon black (C), synthesized by sol-gel-hydrothermal method, have been studied by XRPD and Raman scattering. Detailed size-strain analyses of XRPD and Raman scattering results are presented in order to investigate the influence of C content on brokite and anatase phase formation. The XRPD size-strain analyses have resulted in reliable structure and microstructure results for both anatase and brookite and their relative abundance ratio has been refined by Rietveld method. The brookite ...

  • 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
    ... covers the Mesozoic– Cenozoic sedimentary succession of the High Karst Unit, which is thrust towards the southwest over the Dalmatian Unit (also partially over the Budva-Cukali Unit), while it is overthrust by the Pre-Karst Unit towards the NE (Fig. 1D). In a palaeogeographic sense, this region belonged ...
    ... covers the Mesozoic- Cenozoic sedimentary succession of the High Karst Unit, which is thrust towards the southwest over the Dalmatian Unit (also partially over the Budva-Cukali Unit), while it is overthrust by the Pre-Karst Unit towards the NE (Fig. 1D). In a palaeogeographic sense, this region belonged ...
    ... reflect- ed in a variety of deposited rock types that can be observed in East Herzegovina (Fig. 1C). 4 N. ALEKSIĆ Et Al. �e oldest stratigraphic unit in the area is the mixed si- liciclastic-carbonate succession of the Late Triassic, exposed in the core of the Lastva Anticline (Fig. 1C). �ese sediments ...

  • Compaction of Municipal Solid Waste

    Jovana Janković Pantic, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Snežana Bogdanović (2022)
    Regardless of the numerous activities undertaken to reduce municipal solid waste, its annual volumes continue to grow. In Serbia, the most common and the only one form of waste disposal is at municipal landfills with daily compaction and soil covering. Municipal waste compacting is one of the basic components of the disposal process. Well compacted waste takes up less volume and allows much safer storage. In order to better predict the behavior of municipal waste at landfills, it is ...
    compaction, hammer with spikes, landfill, municipal solid waste, proctor compaction test

  • Analiza mogućnosti primene tehnologije hvatanja i skladištenja ugljenika (CO2) na objektima Nis-A

    Isidora Veljanoski (2024)
    U ovom radu opisana je primena CCUS tehnologija u kompaniji NIS i na koji način treba da se optimizuje da bi projekat bio rentabilan.U prvom i drugom poglavlju opisani su energetski trendovi i tranzicije, razvojni mehanizmi za regulisanje emisije gasova staklene baste i o ugljen-dioksidu kao hemijskom jedinjenju i šta je to CCUS.U trećem, četvrtom i petom poglavlju je detaljnije opisano izdvajanje, hvatanje, transport i skladištenje ugljen-dioksida.Šesto poglavlje i sedmo poglavlje obuhvataju rešenja za razvoj i realizaciju CCUS projekata ...
    energetski trendovi, ugljen-dioksid, CCUS, izdvajanje, hvatanje, transport i skladištenje CO2, ležište, ekonomija projekta
    ... Financing Debt finance of CAPEX Interest rate of bank Debt period Bank loan insurance % unit RSD/tCO2 RSD RSD RSD RSD/tCO2 RSD RSD unit % % % unit year year year unit % % years of residual debt Tabela 8.5 — Pretpostavke projekta 70% Value 1646.40 ...
    ... capturing % 70% Investment unit Value CAPEX capture RSD/tCO2 1646.40 CAPEX capture RSD 843,125,140 CAPEX transport RSD 497,893,120 CAPEX compression RSD 352,780,800 OPEX capture RSD/tCO2 24.60 OPEX transport RSD 150,000 OPEX compresion RSD 200000 General assumptions unit Value Discount rate ...
    ... rate % 14.0% Taxrate % 15% Tax property % 0.40% Amortization assumption unit Value Generation start year year 2024 Life time in years year 20 Construction time in years year 1 Financing unit Value Debt finance of CAPEX % 66% Interest rate of bank % 6% Debt period years 15 Bank loan ...