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Упит dcterms_subject_txt:могућност коришћења УПГ-а у Србији

4193 items

  • Agent-based modeling as a support to an expert-based approach: Exploring individual heating systems transition

    Boban Pavlović, Marija Živković, Dejan Ivezić (2022)
    Expert-based energy scenarios are mainly developed following assumptions of experts and, in most cases, a limited number of stakeholders. Such an approach will provide satisfactory results in centrally managed energy sectors where further decisions could be envisaged relatively precisely (electricity production/distribution, district heating systems, etc.). The same approach will provide more uncertain outcomes of future energy structure in the household sector, where decisions related to consumption, selection of energy source, or application of specific technology are made by numerous ...
    Energetska tranzicija, Grejanje domaćinstava, Individualni sistemi grejanja, Energetsko planiranje, Integrisano energetsko planiranje, ABM, LEAP, Srbija

  • Планирање – функција менаџмента пројекта минералне индустрије

    Жељко Вучић (2024)
    Просторно планирање је комплексан мултидисциплинаран процес утврђивања оптималног распореда људи, добара и делатности на одређеној територији ради његове оптималне употребе. Циљ просторног планирања је распоредити и најбоље користити садржаје у простору што је неизводљиво без детаљних анализа потенцијалних, штетних агенаса на целокупно подручје и његово становнисштво. Утицај рударства на окружење вишеструко се повећао након увођења технологије површинске експлоатације минералних сировина, али и свеукупног лошег дејства на животну средину. Под појом животне средине подразумевамо природне и радом створене вредности у ...
    просторно планирање, урбанистички план, кречњак, заштита животне средине, економски аспекти
    ... (Tpudkonuh u Byunh, 2010). PasapBuHjeHe 3eMJbe EpBpomme cy NaBHO cXBaTHNe yNOry Karacrpa H KaTaCTapcKHX eBHJeHIHJa y IUHaHHpaMby H pa3BOJy CBOJHX TepHTopHja. V TOM CMMHCJIy, BeJMKa cpencTBa ce H3JIBajJajy 3a pa3BOj H H MOJepHHaanuHjy KaracTpa, Kako OH ce mocTHrJa CKOPpO JIHeBHa a)KypHOCT y y ...
    ... eorpaQcku QakyıreT. 16. Nadin V. (2001): Sustainability from a National Spatial Planning Perspective. In: Towards a New Role of Spatial Planning. OECD Proceedings, Paris. 17. Blowers A.(1993): Planning for a Sustainable Environment: A Report by the Town and Country Planning Association. London: ...
    ... H rpaj/loBa. IInaHoBM Mopajy OHTH ycKMaleHHM HO BepTHKaHHM H XOpH3oHTaut. To 3Haum a J\OKyMeHT yoxer mnonpyuja Mopa OuHTH y cCKJIaJly Ca J[OKyMECHTOM uper nojpyuja, Kao H a HnaHOBH CycejlHHX TepHTopuHja Mopajy a ce HajOBe3y]Jy jeMaH Ha JpyrH H ycknal)yjy. Tipocmopnu naan Penyonuke Cpouje (IIIIPC) ...

  • Reconstruction of the Tethys’ Waning in the Balkans

    Dejan Prelević, Kristijan Sokol, Ana Mladenović, Violeta Gajić, Vladica Cvetković (2024)

  • A variant of McDougall-Wotherspoon method for finding simple roots of nonlinear equations

    Glišović Nataša, Ralević Nebojša, Ćebić Dejan (2018)

  • Development and evaluation of fracture gradient curve model: a case study of south-central Kazakhstan

    Branimir Stanisavljevic, Vesna Karovic Maricic, Irena Isakov (2022)
    An accurate fracture gradient value is one of the most important issues in oil and gas well design and drilling. The value of a fracture gradient is a critical parameter for determining the drilling mud weight and selecting the proper depths for setting the casing in the planning process of drilling operations. This paper proposed the new curve model of fracture gradient for the south-central Kazakhstan (central Asia) region based on the analysis of leak-off test and format integrity ...
    gradijet frakturiranja, model nove krive, projektovanje naftne bušotine, Kazahstan

  • A contribution to the understanding of hydrochemical properties of thermomineral water on the L’dži locality (eastern part of North Macedonia)

    Hristina Petrova, Katarzyna Wątor, Piotr Rusiniak, Boris Vakanjac, Vesna Ristić Vakanjac, Ewa Kmiecik (2023)
    Regarding the aspect of mineral, thermo-mineral, and thermal waters, on the territory of the Republic of North Macedonia, there are 65 registered locations, of which 8 are categorized as spas. This includes the Kežovica spa, also known as the Štipska spa. In the vicinity of Kežovica Spa is the thermo-mineral L’Dži spring with mineralization around 1.3 g/L and the water temperature at the time of sampling was 50.1 °C. Spring L’Dži is generated by a fault structure and is ...
    thermo-mineral water, water chemistry, hydrochemical properties, L’dži locality, North Macedonia.

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... hand, the testing wedge that is used for wedging the rock specimens has a wedge angle of 35◦ with a blunter tip of width b = 5 mm and length of l = 65 mm (Figures 7 and 8) [14,17]. σ σ σ (a) (b) Figure 7. Wedge test method: (a) the wedge and (b) wedge position while testing cutting force. This ...
    ... KL = P/L (N/cm′) (3) KA = P/A (N/cm2) (4) Minerals 2021, 11, 564 7 of 17 where: P—force (N), L—length of the specimen (cm’), and A—specimens’ cross-section area (cm2). ′ (a) (b) γ γ γ σ σ σ σ σ Figure 8. Wedge testing method (Orenstein and Koppel): (a) cylindrical (core) sample and ...
    ... diameter of the sample. A rock or soil sample is placed in a triaxial (glass or plastic) cell, in the triaxial test, with the sample being enclosed in a rubber membrane. The membrane is sealed to circular plates at the top and the bottom of the sample, with two o-ring seals ensuring a water-tight connection ...

  • Prilog poznavanju režima voda reke Visočice

    Vesna Ristić Vakanjac, Jovan Nikolić, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin, Jelena Ratković (2018)
    Специфични геолошки и хидрогеолошки услови у области слива реке Височице, а пре свега широко распрострањење карбонатног средње тријаског комплекса стена, као и доњо тријаске шарене серије (алевролити, пешчари, конгломерати) имали су за последицу формирање специфичног типа дренажне мреже као и специфичног режима отицаја реке Височице и њених значајнијих притока. У конкретном случају, у горњим деловима слива ове реке као и њених главних притока, у оквиру доњо тријаских седимената развијен је дендритичан тип хидрографске мреже, док преласком на средње тријаске ...
    režim, specifični oticaj, Visočica

  • Утицај похабаности резних елемената роторног багера на ниво вибрација погона за копање

    Филип Милетић (2023)
    У докторској дисертацији је анализиран утицај похабаности резних елемената роторног багера на потрошњу електричне енергије и ниво амплитуде вибрација погона за копање. Креиран је модел који у функцији стања резних елемената дефинише зависност разматраних физичких феномена. За развој модела примењене су једначине теорије осцилација и Ватметарска метода [1] којом се одређује потрошња електричне енергије. За верификацију модела извршена су мерења на роторном багеру SRs2000.32/5+VR ангажованом на откопавању откривке на површинском копу Тамнава–Западно поље. Обављено је пет мерења. Резни елементи су ...
    роторни багер, резни елементи, хабање, вибрације, потрошња електричне енергије

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... the form of a XML document our tool LeXimir relies on W3C standard languages Xquery and XSLT supported by .Net. The user interface for automatic production of DELAC lemmas is very straightforward and easy to use. A user can choose a file with a prepared list of MWUs and a file with a strategy, and ...
    ... star’ and Farenhajtov stepen ‘Fahrenheit degree’ consist of an adjective followed by a noun, which in Serbian is the natural order of an adjective and a noun in a MWU. However, these MWUs, together with a few more allow a reverse order as well — zvezda petokraka and stepen Farenhajtov. Both MWUs can be ...
    ... analogy with entries in a dictionary of simple word lemmas, an entry in a DELAC dictionary consists of a MWU lemma to which a name of an inflectional transducer (similar to the one represented in Figure 1) is assigned. Similarity ends here, because simple word constituents of a MWU lemma also have to ...

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

    Vesna Cvetkov, Ilija Vasiljević, Mirko Petković (2015)

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • Грешка инклинације код депозиционе реманетне магнетизације

    Mirko Petković, Vesna Cvetkov (2019)
    ... zatim, računa inklinacija u trenutku depozicije sedimenta. Mjerenje anizotropije pojedinačnih minerala nosioca magnetizacije pokazalo je da je faktor elipticiteta za magnetit u domenu 0,54 ≤ f ≤ 1, a za hematit 0,4 ≤ f ≤ 1. Druga numerička aproksimacija, prikazana u ovom radu, zasniva se na p ...
    ... tan 𝐼0 = 𝑓 tan 𝐼𝑓. (4) Promjenljiva 𝑓 u (4) predstavlja faktor elipticiteta (flattening factor), a ista jednakost u paleomagnetskoj literaturi poznata je i kao greška ili oplićenje inklinacije. Mjerenje depozicione remanentne magnetizacije u većini slučaja smatra se anizotropnim procesom ...
    ... e remanentne magnetizacije sistematski je manja u odnosu na inklinaciju u trenutku depozicije sedimentne stijene, međutim, nekada je ta greška značajna, a nekada potpuno zanemarljiva. Promjene inklinacije najčešće su posledica gravitacione torzije u samom trenutku depozicije. Pored gravitacione torzije ...

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Ground surface subsidence monitoring using sentinel-1 in the “Kostolac” open pit coal mine

    Zoran Gojković, Milan Kilibarda, Ljiljana Brajović, Miloš Marjanović, Aleksandar Milutinović, Aleksandar Ganić (2023)
    Open pit coal mining affects surrounding populated areas, resulting in terrain surface deformation. Surface deformation should be monitored as often as possible to control deformations and prevent potential incidents. This paper analyzes time series deformation estimated from the Sentinel-1 satellite images using the Persistent Scatterer Interferometry method to monitor subsidence rates caused by open pit mining activities. It is possible to measure deformations using classical geodetic methods, but those are rarely used in practice because they are time-consuming and ...
    Sentinel-1 InSAR, слегање, рударствo, интерферометрија, даљинска детекција, Костолац

  • Development of the hybrid MCDM model for evaluating and selecting bucket wheel excavators for the modernization process

    Snezana Savkovic, Predrag Jovancic, Stevan Djenadic, Milos Tanasijevic, Filip Miletic (2022)
    This paper presents a methodology for evaluating and ranking different bucket wheel excavators (BWE) for determining which machine should enter in the process of revitalization and modernization. Various multicriteria methods are used. Combining them achieves the best effect when choosing BVE for the modernization process. AHP, TOPSIS, VIKOR, and PROMETHEE methods are used. The hybrid models are developed from the multi-criteria decision making (MCDM) methods and they are used to evaluate the basic indicators that characterize the operation of ...
    višekriterijumsko odlučivanje, rotorni bageri, modernizacija, ekspertska analiza

  • Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals

    Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)
    As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...
    nanocrystal, curcumin, top-down method, wetball milling

  • Примена CNC машина при обради мермера

    Ненад Остојић (2024)
    Мермер је стена настала метаморфизмом седиментних карбонатних стена, најчешће кречњака или доломита. Мермер се углавном састоји од калцита,кречњака, серпентина и доломита. Његове главне компоненте су углавном калцијум карбонат, који чини више од 50 посто, и други магнезијум карбонат, калцијум оксид, манган оксид и силицијум диоксид, итд. Фазе обраде мермера су: примарно резање мермерних блокова у плоче, површинска обрада мермерних плоча, секундарно резање мермерних плоча, терцијарна обрада (ако је потребно). CNC машина је електро-механички уређај који управља алатима, користећи програмирање путем ...
    мермер, површинска експлоатација, архитектонско-грађевински камен, обрада мермера, CNC машине
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  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... were collected using, Ultima IV Rigaku diffractometer with CuK , radiation (U = 40.0 kV, I = 40.0 mA) equipped with D/TeX Ultra high—speed detector. The diffraction angle range was 10-80* 20 with a step of 0.02". at a scan speed of 5?/min. The phase composition of the synthesized materials, as well ...
    ... OO \ o \HŽ·;·C«_–()–(A')–(H OO Oy-C—CxoO| 0 100 200 300 400 500 600 t["C] 20 . LAA 1300 •C 16| c ~_ A 14 a | _ r O O " = sl RuHENNEBRNRA | * BaTiO,NiFe,O, al N al * BaTiO„ZnFe,O, a .= —— BaTiO,INi, „Zn,,Fe,O, · *. FI n . A“A LE a O I LI I IL I OOO -d 100 200 300 400 500 600 ...
    ... the range of 20 and 30 kV. Mass magnetization measurements were performed according to a modified Faraday method using a laboratory weighing scale (Sartorius PRACTUM 124-1S) with a sensitivity of 107 kg and a magnetic field strength at the sample placement site of 50 kA/m. The heating rate was ...