Претрага
313 items
-
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... struc- ture was calculated in a first step corresponding to the parent phase expressed in the setting of the low-symmetry phase (Table 7). Notably, a Wyckoff splitting can be observed. The oxygen position O1 (Wyckoff site 12k in P63/mmc) is split into two positions in Cmcm: O1 (16h) and O1_2 (8f) ...
... reference struc- ture was calculated in a first step corresponding to the parent phase expressed in the setting of the low-symmetry phase (Table 7). Notably, a Wyckoff splitting can be observed. The oxygen position O1 (Wyckoff site 12k in P63/mmc) is split into two positions in Cmcm: O1 (16h) and O1_2 (8f), ...
... magnetic prop- erties within the measured temperature range. In both K3YbSi2O7 polymorphs, the Yb3+ ion is in the centre of an oxygen octahedron, with only slight differences between two phases concerning the Yb–O distances. In both cases, the site local symmetry is lower than cubic, so 2F7/2 splits into ...Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović. "Low-temperature phase transition and magnetic properties of K3YbSi2O7" in Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, International Union of Crystallography (IUCr) (2021). https://doi.org/10.1107/S2052520621006077
-
A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia
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 ...... Biomass 64.72 0.17 Biogas power plants 22 aspects and ranked them in order of priority. Ruiz et al. (2020) proposed a decision support tool that integrates the AHP algo- rithm into a Geographical Information System (GIS) package for site-suitability assessment of solar power plants. Al Garni et al. (2016) ...
... community looking to invest in renewables. The analysis excludes the impact of govern- ment incentives or subsidies, system balancing costs associated with variable renewables, and any system-wide cost-savings (IRE, 2019). The limitation of this approach is the fact that all RESs are site-specific and that is ...
... gener- ation and amounts of produced electricity in 2019 are shown in Table 1, while the structure of electricity generation from RESs in the 2014–2018 period is shown in Fig. 1. In Serbia, the National Renewable Energy Action Plan set a target of 27% of RES in its gross final energy consumption by 3 ...Boban Pavlović, Dejan Ivezić, Marija Živković. "A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia" in Energy Reports, Elsevier BV (2021). https://doi.org/10.1016/j.egyr.2021.02.072
-
Испитивање магнетске сусцептибилности прашине антропогеног порекла
... potreban veliki set uzoraka kako bi se pronašli „prosečni“ ili „tipični“ uzorci za druge, skuplje analize ili analize koje dugo traju. Merenja vršena in situ, na terenu, ubrzavaju proces povezivanja podataka sa terenskim opservacijama, što je veoma važno za ljude koji rade u udaljenim područjima daleko ...
... [2] Márton, E., Lesić, V., et al. (2012). First magnetic measurements on PM10 filters from two stations in Serbia and comparison of the results with those from nine Hungarian stations. In: Geosciences and Environment. The 3rd International Professional Conference, 27-29 May 2012, Belgrade, Serbia ...
... је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Vazduh VII Memorijalni naučni skup iz ...Дубравка Новичић, Весна Цветков, Весна Дамњановић. "Испитивање магнетске сусцептибилности прашине антропогеног порекла" in VII Меморијални научни скуп из заштите животне средине доцент др Милена Далмација Нови Сад, 01-02. април 2019, Природно-математички факултет, Департман за хемију, биохемију и заштиту животне средине (2019)
-
Hydrogeochemistry of Uranium in the Groundwaters of Serbia
Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić. "Hydrogeochemistry of Uranium in the Groundwaters of Serbia" in Uranium - Past and Future Challenges, Springer International Publishing Switzerland (2015). https://doi.org/10.1007/978-3-319-11059-2_89
-
Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization
Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić . "Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization" in Mineral and Thermal Waters of Southeastern Europe, Springer International Publishing (2016). https://doi.org/10.1007/978-3-319-25379-4
-
Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin
Balázs Németh, Gábor Tari, Gábor Bada, Dejan Radivojević, Bruno Tomljenovic, Csaba Krézsek. "Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin" in Interpretation, AAPG SEG (2018). https://doi.org/10.1190/INT-2017-1207-SPSEINTRO.1
-
Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
-
Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species
Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić. "Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species" in Nanotechnology, IOP Publishing (2019). https://doi.org/10.1088/1361-6528/ab3ca2
-
Palaeoflora of Kamenica (Pranjani Basin, western Serbia)
Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...... Neogene basins (yellow shaded areas) and the location of the paleontolog- ical site Kamenica (pink dot) in the vicinity of a steep (gravitational or reverse) fault of Se–NW direction. The Paleogene and Neogene deposits in last few years were investigated from different aspects (e.g. đOrđevIć-MILuTINOvIć ...
... configuration of the basin basements and surrounding geology, im- plying a relatively shallow basin depth. The location of the Kamenica paleontological site is in a zone of abrupt changes of gravity anomaly values, probably ZoricA LAZArEVić, LjUBicA MiLoVAnoVić, jELEnA MiLiVojEVić & iVAnA VASiLjEVić Geol ...
... broad-leaved evergreen vegetation. In these palae- ofloras Lauraceae, especially Daphnogene predom- inate. conifers are more abundant in the Kamenica palaeoflora than in most of the early Miocene floras of Serbia. during the early Miocene paleoclimatic conditions in Serbia were warm and humid as can be ...Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević . "Palaeoflora of Kamenica (Pranjani Basin, western Serbia)" in Geološki anali Balkanskog poluostrva, Beograd : Rudarsko-geološki fakultet (2019). https://doi.org/10.2298/GABP1902053L
-
Split-Desktop software for the analysis of fragment size distribution of blasted rock mass
Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović. "Split-Desktop software for the analysis of fragment size distribution of blasted rock mass" in 9th International Conference Mining and environmental protection, Sokobanja, Serbia, 24 – 27. May 2023, Belgrade : University of Belgrade, Faculty of Mining and Geology (2023)
-
Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)
Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu. "Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)" in Carbonates and Evaporites, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s13146-020-00550-3
-
Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules
The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analizaSvetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón . "Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules" in Bulletin of Engineering Geology and the Environment , Springer (2024). https://doi.org/10.1007/s10064-024-03667-0
-
Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude
Ivana M. Jovanović (2016-01-13)U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže... proizvod ovih sita (poz. 20), čija je krupnoća –60+20 mm, spaja se sa nadrešetnim proizvodom donjih prosevnih površina primarnih sita (poz. 8) i preko transportnih traka (poz. 13) transportuje do do bunkera (poz. 14). Podrešetni proizvod sita (poz. 20), kao definitivni proizvod drobljenja ima d ...
... (poz. 6), dozira na transportne trake (poz. 7). Sa transportnih traka (poz. 7) ruda gravitacijski pada na dva vibraciona sita za primarno prosejavanje (poz. 8). Primarna sita su sa po dve prosevne površine. Nadrešetni proizvod gornje prosevne površine (krupnoće –200+60 mm) transportuje se sistemom ...
... BEOGRADU, RUDARSKO-GEOLOŠKI FAKULTET 142 prosevne površine sita na poziciji 8, čija krupnoća iznosi –60+20 mm, se sistemom transportnih traka (poz. 13) dalje odvodi u prihvatni bunker (poz 14) na tercijarno drobljenje. Podrešetni proizvod sita (poz. 8), krupnoće –20+0 mm, pada na transportnu traku ...Ivana M. Jovanović. "Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-01-13)
-
Effects of external noise on threshold-induced correlations in ferromagnetic systems
Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević. "Effects of external noise on threshold-induced correlations in ferromagnetic systems" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.062114
-
LRMI markup of OER content within the BAEKTEL project
... management in Mongo DB, with videos served from YouTube or Amazon S3 and student data in MySQL, edX Studio for course development in same Mongo DB that the LMS uses Course Browsing, as a simple front page for browsing courses (edx.org site home page and course discovery site is not open ...
... Resource Metadata Initiative (LRMI) [5]. The focus of this paper is on LRMI metadata and their management in the context of BAEKTEL OER framework, which is described in more detail in section 2. In section 3 a review of semantic annotation implementation with examples of resource tagging is given ...
... tagged in a standard way in machine readable form. In that case, results returned by search engines are more relevant, and both educators and learners can find and compare learning materials that best suit their current needs more efficiently. Implementation can be accomplished in the following ...Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić. "LRMI markup of OER content within the BAEKTEL project" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade : Belgrade Metropolitan Univesity (2015)
-
A business intelligence approach to mine safety management
Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)... Health’s (NIOSH), which is the leading world organization in this area. At the beginning of June 2014, the Office of Mine Safety and Health Research (OMSHR) within NIOSH announced the implementation of a taxonomy-based navigation tool called “Site Browser” (http://wwwn.cdc.gov/niosh-mining) that allows ...
... resources in Serbia Knowledge management in Serbian mining companies using ICT support for managing knowledge assets is still scarce in Serbian mining practice. However, various other applications of ICT in the field of mining have emerged in the past decade. In general, ICT is introduced in various ...
... gained in other circumstances that can be applied in potentially critical situations. Mining organizations need to preserve and transfer knowledge in order to be able to respond to emergencies, and knowledge management (KM) provides a useful perspective from which to tackle this issue [2]. In mining ...Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić . "A business intelligence approach to mine safety management" in 13th International Symposium Continuous Surface Mining, Beograd : Yugoslav Opencast Mining Committee (2016)
-
A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)
... l conceptual site models; data analysis and visualisation. London: CRC Press. MORTON, K.L., VAN MEKERK, F.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 ...
... (5), pp. 169-175. WELS, C., FERGUSON, P.R. and FAWCETT, M. (2012) Numerical groundwater flow modelling at the historic Rum Jungle mine site, northern Australia. In: MCCULLOUGH, C.D., LUND, M.A., and WYSE, L. (eds.) Proceedings of the International Mine Water Association Symposium. Bunbury, Australia ...
... observation network comprised of 116 piezometers (of which 54 in the upper aquifer, 22 in the intermediate aquifer, and 40 in the lower aquifer) were measured and analyzed. Both the initial and boundary conditions are also examined in detail in Polomčić et al. (2016). The schematization described above ...Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin. "A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)" in Underground Mining Engineering no. 29, Belgrade : University of Belgrade - Faculty of mining and geology (2016): 43-54
-
Sitni, ali bitni: uloga sitnih sisara, herpetofaune i mekušaca u rekonstrukciji pleistocenskih paleosredina
Fosilni ostaci životinja i biljaka imaju važnu ulogu u rekonstrukciji pleistocenskih paleosredina. U ovom radu opisan je značaj tri grupe životinja: sitnih sisara, herpetofaune I mekušaca. Mada je za rekonstrukciju važan sastav čitave asocijacije, nalasci pojedinih vrsta mogu biti dovoljno indikativni da otkriju tip staništa ili klimatske uslove. Posebnu teškoću pri rekonstrukciji paleosredina u Srbiji predstavlja činjenica da klimatske promene na Balkanskom poluostrvu nisu bile tako oštre kao u srednjoj i zapadnoj Evropi, pa ne postoji drastična razlika u ...... & Lewis, J. P., (2016): Oxygen isotopes in Molluscan shell: Applications in environmental archacology, Environmental Archacology. The Journal of Human Palaeoecology, 21 (3), 295-306. Lopez Antofianzas, R., & Cuenca Bescos, G., (2002): The Gran Dolina site (Lower to Middle Pleistocene, Atapuerca ...
... on the Neanderthal site of the Cova del Gegant (Sitges, Barcelona, Spain). Journal of Human Evolution, 55, 1151-1155. Mihailović, D., & Bogićević, K., (2016): Technological changes and population movements in the late Lower and carly Middle Palaeolithic of the Central Balkans. In: K. Harvati & M. ...
... habitat or climatic conditions. A particular difficulty in reconstructing palaecoenvironments in Serbia is the fact that climate changes on the Balkan Peninsula were not as sharp as in Central and Western Europe, so there is no drastic difference in composition, on the basis of which we would easily ...Katarina Bogićević, Draženko Nenadić, Dragana Đurić, Mihajlo Jovanović, Aleksandra Savković. "Sitni, ali bitni: uloga sitnih sisara, herpetofaune i mekušaca u rekonstrukciji pleistocenskih paleosredina" in Zbornik sažetaka III Kongresa geologa Bosne i Hercegovine, Neum, 21.-23.09.2023., Ilidža : Udruženje geologa Bosne i Hercegovine (2023)
-
Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma
... recurrenceVin lymph nodes in 9 patients (6.9%) and in thyroid bed (local recurrence) in 2 patients (1.5%), whereas recurrence at distant site appeared in 3 patients (2.3%)Visolated in 1 patient, associated with lymph node recurrence in another patient, and combined with local recurrence in a third patient. The ...
... microcarcinoma patients treated with TT/NTT and RAI. They reported a recurrence rate of 7% in thyroid bed, without distant site recurrence or disease-related mor- tality. These authors advocated that PTM should be treated in a same way as papillary thyroid carcinoma (PTC) suggesting thyroidectomy followed by ...
... 6.9* 1.5‡ DSR, distant site of recurrence; M1, distant metastasis at presentation; MF, tumor multifocality; N1, lymph node metastasis at presentation; ND, no data; R, recurrence rate. *Recurrence in lymph node †Overall recurrence rate. ‡Local recurrence (recurrence in thyroid bed). Clinical Nuclear ...Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković. "Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma" in Clinical Nuclear Medicine, Lippincott Williams & Wilkins (2013). https://doi.org/10.1097/RLU.0b013e3182872ed2
-
Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis
U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...... Group 7 C.S. Michell (2013). Investigating the use of forensic stylistic and stylometric techniques in the analysis of authorship on a publicly accessible social networking site (Facebook) (MA in Linguistics thesis). University of South Africa 8 C. Hardaker (2015). The ethics of online aggression: ...
... Group 13. C.S. Michell (2013). Investigating the use of forensic stylistic and stylometric techniques in the analysis of authorship on a publicly accessible social networking site (Facebook) (MA in Linguistics thesis). University of South Africa 14. C. Hardaker (2015). The ethics of online aggression: ...
... aspects of scholarly work in the classroom settings but often overlooked in general blogging platforms. 1 dalibor.vorkapic@rgf.bg.ac.rs 2 https://omeka.org/ For the digital library presented in this paper, Omeka is installed on operating system Ubuntu 15.10 in a virtual machine. This ...Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović. "Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis" in International Scientific Conference “Archibald Reiss Days” Thematic Conference Proceedings Of International Significance, Belgrade, 7-9 November 2017, Academy Of Criminalistic And Police Studies Belgrade (2017)