Претрага
490 items
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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 ...... tananateranatatatataataaaaeke 35 7 MH}KEM5EPCKO-TEO71IOHIKE KAPAKTEPMCTMHME 71E}KMIMITA .........aaaaaaa a aeaaaaaaeevaeaaeaeeve 36 OBBRRRJS,G V ii el [e],|[0D,f.(o}H1:(, 7 OAARAAAAAAAARAAAAARAAAARANAAAAAAAAAAAANAAAAAAAAARARAAARANARAAAAAAAAARANANANAAAAAAAAAAAAAARAAAAAAAAAANIA 38 8.1. |= (e][0] ...
... H. (2016): KpariukH OCBpT Ha IIpaBHJIHHKC H Jpyre akTe. 30opHHK pajioBa rpabjeBHHckKor (bakynrera, CyOCoruma; 29:69-81. 11. Tpadjkopuh M, Byunh II. (2010): Varora karacrpa y nnraHHpam»y H H3rpajubH rpaJiCKOr noxjpyuja. 30opHHk pajioBa rpabeiHckor bakyanrera, Cyooruma; 19:135-40. 12. 3aKoH O ...
... (Qakynrera je (aaokpyotcumu JeOHy oO O6e onuuje): @ pe/LyKOBaHOo JUOCTyIaH KpoO3 HaCJIOB 3aBPIHor pajla H pe3HMe pajla cCa KJbyuHHM peunMa; II. JjaBHO JOcTymaH y OTBOpEHOM TIpHCTyrIIy, TaKO Jla Ta MOTy KODpHCTHTH CBH KOJH nomrryjy ojpenOe canpxkaHc y OJaOpaHoM THy JNMHHCHHC KpeaTHBHC 3ajeHHIC ...Жељко Вучић. Планирање – функција менаџмента пројекта минералне индустрије, 2024
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Vebran Web Services for Corpus Query Expansion
Ranka Stanković, Miloš Utvić (2020)U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.... example slobodan kao ptica (“free as a bird”) the first and the last component inflect as parts of MWU, so the final query would be [word="slobod(an|na|ne|ni|nih|nim|no|nog|noj|nom|nome|nu)"]15 [word="kao"] [word="ptic(a|ama|e|i|o|om|u)"]. The morphological category degree has been restricted to the value ...Ranka Stanković, Miloš Utvić. "Vebran Web Services for Corpus Query Expansion" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.5
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Frequency and Length of Syllables in Serbian
Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.... Linguistics 20, 45-67. Eddington, D., Treiman, R., Elzinga, D. (2013b). Syllabification of American English: Evidence from a large-scale experiment. Part II. Journal of Quantitative Linguistics 20, 75-93. Ferrer-i-Cancho, R., Hernández-Fernández, A. (2013). The failure of the law of brevity in two New ...Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová. "Frequency and Length of Syllables in Serbian" in Glottometrics (2019)
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Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)
Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović. "Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)" in Physics and Chemistry of Minerals, Springer Science and Business Media LLC (2014). https://doi.org/10.1007/s00269-014-0693-x
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Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia
Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin. "Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia" in Hydrogeology Journal, Berlin, Heidelberg : Springer, International Association of Hydrogeologists (2013). https://doi.org/10.1007/s10040-013-1025-9
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Sedimentologija gornje krede centralnog dela vardarske zone
Violeta M. Gajić (2014-09-04)Područje istraţivanja obuhvaćeno doktorskom disertacijom nalazi se ucentralnim delovima Vardarske zone. Karakteriše se sloţenom geološkomgrađom koju grade mezozojske tvorevine trijaske, jurske i kredne starosti, kao ikvartarni sedimenti. U trijasu je istraţivano područje pokrivalo more, sve dogranice sa Šumadijom. Tokom jure sloţenim geotektonskim procesima stvarajuse ofiolitske stene rasprostranjene u juţnim i delom u centralnim delovimaistraţivanog područja. U donjoj kredi se pokretima dinarske faze izdiglo kopno,koje je egzistiralo skoro u celoj donjoj kredi područja istraţivanja.U alb-cenomanu pojedini delovi istraţivanog područja se ...... dajkova (sheeted dykes kompleks). Debljina dajkova varira od nekoliko centimetara (retko) do nekoliko desetina cm, najviše do metar. Često se u njima zapažaju zamrznuti rubovi koji ukazuju na stepen iskristalisalosti i brzinu hlađenja ovih stena tokom stvaranja kompleksa. Izgrađeni su od plagioklasa ...
... Sedimentologija gornje krede centralnog dela Vardarske zone 9 Na osnovu litoloških osobina i određene makro i mikrofaune u okviru kompleksa gornje krede zapadno od ljiško-milanovačke dislokacije, Petrović & Jankičević (1986) izdvajaju dve serije. Starijoj odgovaraju tvorevine od cenomana ...
... Oxford-London-Edinburg-Boston-Palo Alto-Melbourne, 232-280. Karamata S. 1979: Prelazni nivo između tektonita i magmatita-kumulata u ofiolitskim kompleksima Jugoslavije. Glas SANU, 313, Odeljenje prirodno- matematičkih nauka, 45, 79-88. Karamata S., Kneţević V., Memović E. & Popević A. 1994: The Evolution ...Violeta M. Gajić. Sedimentologija gornje krede centralnog dela vardarske zone, Универзитет у Београду, Рударско-геолошки факултет, 2014-09-04
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Old or New, We Repair, Adjust and Alter (Texts)
Cvetana Krstev, Ranka Stanković (2020)U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja... produced that indicates the path that produced it (*%1*), followed by 66 Infotheca Vol. 19, No. 2, December 2019 Scientific paper Letters шн to ни Two letters (value of variable $ul$) are replaced by one or two letters (value of variable $iz$) – replacement int he opposite direction is not performed ...Cvetana Krstev, Ranka Stanković. "Old or New, We Repair, Adjust and Alter (Texts)" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.3
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Integrative GHG Assessment in Oil and Gas Industry
Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...... and stress the importance of developing targeted strategics to furthcr reduce flaring and minimize the environmental impact of oil production. II METHODOLOGY There arc various sources of GHG emissions, including the exploration and exploitation of energy sources, conversion of primary cnergy ...Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa. "Integrative GHG Assessment in Oil and Gas Industry" in Energija, ekonomija, ekologija (2023). https://doi.org/10.46793/EEE23-1.51M
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...... K. (eds.): Géologie de le Serbie. Stratigraphie, II/3, 145–154. EREMIJA, M. (1977b): Pliocen belopotočke rov-sinklinale [Pliocene of the Beli Potok trench-syncline – in Serbian].– In: PETKOVIĆ, K. (eds.): Géologie de le Serbie. Stratigraphie, II/3, 178–181. EREMIJA, M. (1987): Badenski kat [Badenian ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems
Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević. "Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems" in Physical Review E, American Physical Society (APS) (2019). https://doi.org/10.1103/PhysRevE.100.032113
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An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction
Dejan Ćebić, Nebojša Ralević, Marina Marčeta. "An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction" in Mathematical Communications (2020)
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SrpELTeC: A Serbian Literary Corpus for Distant Reading
U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analyticsRanka Stanković, Cvetana Krstev, Duško Vitas. "SrpELTeC: A Serbian Literary Corpus for Distant Reading" in Primerjalna književnost, Research Centre of the Slovenian Academy of Sciences and Arts (2024). https://doi.org/10.3986/pkn.v47.i2.03
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Uticaj utiskivanja gas-lift gasa na prenos mase i toplote
Branko Grubač (2019)Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...... za proračun pada pritiska kroz horizontalne, vertikalne i cevi pod nagibom. Poseban izazov za rad bila je činjenica da u literaturi nije pronađen ni jedan izvor koji opisuje modelovanje protoka fluida od dna do glave bušotine korišćenjem Aspen HYSYS programa. Prvi korak pri modelovanju bila je ...
... koji je tada predstavljao jedini dostupan program u kojem je moguće uraditi simulaciju protoka fluida u cevima. Pregledom literature nisu nađeni ni slični modeli u kojima se Aspen HYSYS koristi pri modelovanju bušotine koja proizvodi u kontinualnom gas-liftu. Postoje drugi specijalistički programi ...
... под насловом Утицај утискивања гас-лифт гаса на пренос масе и топлоте резултат сопственог истраживачког рада; да дисертација у целини ни у деловима није била предложена за стицање друге дипломе према студијским програмима других високошколских установа; да су резултати коректно ...Branko Grubač. Uticaj utiskivanja gas-lift gasa na prenos mase i toplote, Beograd : Rudarsko-geološki fakultet, 2019
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Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining
... Type of Rock/Soil Strength Index, fpr (MPa) Uniaxial Compressive Strength, σc (MPa) I High-strength rocks Solid and tough quartz and basalt 20 200 II Very hard rocks Porphyritic quartz, granite 15 150 III Hard rocks Granite, hard sandstone, hard iron ore 10 100 IV Relatively hard rocks Normal sandstone ...Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić. "Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11060564
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A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System
This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFISMiljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić. "A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System" in Energies, MDPI AG (2023). https://doi.org/10.3390/en16072958
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BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations
Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina. "BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations" in 17th International Conference of the open and underwater mining of minerals, Sts. Constantine and Helena Resort, Varna, 18-22 September, Bulgaria, Sofia, Bulgaria : Scientific and Technical Union of Mining, Geology and Metallurgy, (2023)
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The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>
The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...... at 1.8A resolutions. J Mol Biol 1990;214:43—170. 8] Cooper JB, Khan G, Taylor G, Tickle IJ, Blundell TL. X-ray analyses of aspartic proteinases. II. Three-dimensional [9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 P+ ...Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić. "The influence of Al3+ion on porcine pepsin activityin vitro" in Journal of Enzyme Inhibition and Medicinal Chemistry, Informa UK Limited (2008). https://doi.org/10.1080/14756360701841095
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Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... s for three fuzzy sets is C = j3. If a low number is used for j, problems can occur upon composition because there are gaps in the final result; (ii) Only the combinations whose membership function values are different from zero are taken for further analysis, µS,O,D j=1, . . . , 10 ,0, j = 1, ...
... Using stakeholders’ judgement and fuzzy logic theory to analyze the risk influencing factors in oil and gas pipeline projects: Case study in Iraq, Stage II. Int. J. Crit. Infrastruct. Prot. 2020, 28, 100337. [CrossRef] 20. Ataei, M.; Khalokakaie, R.; Hossieni, M. Determination of coal mine mechanization ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
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Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... classification Table 2 The international system of classification of fly ash Group Ash SiO2/Al2O3 CaO / % SO3 I Aluminosilicate >2 <15 undefined II Silicate - Aluminate <2 <15 <3 III Sulfate - Alkaline undefined >15 >3 IV Other (lime) undefined >15 <3 2. The classification of fly ash ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
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The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje
In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...... language". Pavlovic, T. Milosavljevic, D., Lambić, M., et al., 2011. "Solar energy in Serbia". Contemporary Materials (Renewable energy sources), Volume II-2, pp. 204 - 209. PBC GIS, 2019. Site Modeling in Context - Obtaining And Transforming Elevation Data, pbc Geographic Information Services, available ...Boban Pavlović, Milica Pešić-Georgiadis. "The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje" in 12th International Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece, Energy Policy and Development Centre (KEPA) of the National and Kapodistrian University of Athens (2019)