Претрага
413 items
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Primena bazičnih stena u zavisnosti od njihovog kvaliteta
Mihajlović Božidar, Simić Dušan, Lazarev Slobodanka, Ljubičić Milan, Simić Vladimir. "Primena bazičnih stena u zavisnosti od njihovog kvaliteta" in Stanje i perspektive u rudarstvu i održivi razvoj, Rudarstvo 2011, Zbornik radova II Simpozijuma sa međunarodnim učešćem, Vrnjačka banja, Beograd:Privredna komora Srbije (2011): 682-689
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Bespilotne letelice u rudarstvu Srbije
Gojković Zoran, Mikanović Radenko, Miloradović Goran, Milutinović Aleksandar, Ganić Aleksandar (2016)Gojković Zoran, Mikanović Radenko, Miloradović Goran, Milutinović Aleksandar, Ganić Aleksandar. "Bespilotne letelice u rudarstvu Srbije" in II Rudarsko-geološki forum “Stanje i pravci razvoja rudarstva i geologije u Republici Srpskoj”, Prijedor, Republika Srpska:Univerzitet u Banjoj Luci, Rudarski fakultet Prijedor, Savez inženjera rudara i geologa Republike Srpske (2016): 177-185
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Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?
... old and numerous mineral collection which numbered 1525 samples donated by the St. Petersburg’s State Mining Institute of the empress Catherine II (precursor of Saint Petersburg State University) to the Mineralogical Cabinet of Great School of Belgrade (precursor of Belgrade University) in ...
... visible on the surface itself. The acknowledgement that this gypsum model is gilded indicates that the collection donated by the Empress Catherine II State Mining Institute of St. Petersburg had exceptional value, which obliges us to treat it with great care. In this regard, it is planned that ...Alena Zdravković, Maja Milošević, Ivana Jelić. "Replica of the “Great Triangle Gold Nugget” Belonging to Belgrade University Collection, Gilded or Not?" in 8th Mineral Sciences in the Carpathians Conference, Acta Mineralogica-Petrographica, Miskolc, Hungary, Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Szeged, Hungary (2021)
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Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3
Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)... sagorevanja su korišćene sledeće hemikalije: saharoza CxjaH»Oni koja ima dvostruku ulogu i goriva i kompleksanta, kalcijum-nitrat tetrahidrat, mangan(II)-nitrat hidrat i erbijum(III)-nitrat pentahidrat. Nitrati metala i saharoza su kombinovani u njihovim odgovarajućim stehiometrijskim odnosima da bi ...
... During this combustion method, sucrose Ci.H»Ori which is both fuel and complexant and metal ions in the form of calcium nitrate tetrahydrate, manganese(II) nitrate hydrate, erbium(III) nitrate pentahydrate were used. Metal nitrates and sucrose were combined to prepare this nanostructured in their appropriate ...Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić. "Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3" in Book of Abstracts Proceedings / 59th Meeting of the Serbian chemical society, Novi Sad, Serbia, June 1-2, 2023, Belgrade : Serbian Chemical Society (2023)
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Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове
Јелка Крушић (2023)Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки моделЈелка Крушић. Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове, Београд : Универзитет у Београду, Рударско - геолошки факултет, 2023
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Praktikum iz Tehnologije materijala
Suzana Lutovac, Miloš Gligorić, Luka Crnogorac. Praktikum iz Tehnologije materijala, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2023
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Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases
Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić. "Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases" in Chemical Papers, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s11696-021-01884-5
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A Fuzzy Expert Model for Availability Evaluation
Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...... analyze of obtaining results for bulldozers availability evaluation TABLE II. DETERMINED AVAILABILITY ON THE BASE OF MEASURED TIME STATE PICTURE PARAMETERS Liebherr Year t1, [h] t2, [h] A(t) I 3372 334 0,91 0,89 II 4100 498 0,89 III 4325 431 0,91 IV 3601 449 0,89 V 1438 234 0,86 ...
... Caterpillar Year t1, [h] t2, [h] A(t) I 3415 262 0,93 0,90 II 3631 367 0,91 III 4296 494 0,90 IV 4127 445 0,90 V 2894 387 0,88 Dressta Year t1, [h] t2, [h] A(t) I 3476 384 0,90 0,84 II 3102 572 0,84 III 2635 622 0,81 IV 2757 664 0,81 V 2008 343 0,85 V. CONCLUSION Bulldozers ...
... used for the improvement of maintenance and logistics procedures and additionally, could be used as a support during the purchase of new machines. II. AVAILABILITY EVALUATION Availability is the probability that an item will be in an operable and committable state at the start of a mission when ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)
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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... 731–735. [CrossRef] Garcia, A.R.; Laverat, A.G.; Prudencio, C.V.R.; Mendez, A.J. Synthesis and thermal decomposition of Co(IID), Ni(II), Cu(I1), Zn(II), Cd(II), and Pb(II) m-benzenedisulphonates. Thermochim. Acta 1993, 213, 199-210. [CrossRef] Fereshteh, Z.; Salavati-Niasari, M. Effect of ligand on ...
... A Chem. 2005, 228, 283-291. [CrossRet] 'umar, N.; Kachroo, P.L.; Kant, R. Thermal decomposition of some N-oxide complexes of cobalt(II), nickel(II) and copper(II) carboxylates. J. Therm. Anal. 1979, 17, 81–85. [CrossRef] Dollimore, D.; Pearce, J. Changes in the surface characteristics of residues ...
... complexes ({Fe(acac),3], [Ni(acac).], and [Zn(acac)»], where acac presents acetylacetonate anion). The iron(III) acetylacetonate, nickel(II) acetylacetonate, and zinc(II) acetylacetonate were synthesized in a reaction of appropriate metal ions (Fe3+, Ni?*, Zn?**) with ammonium acetylacetonate. The synthesis ...Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković. "BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties" in Inorganics, MDPI AG (2023). https://doi.org/10.3390/inorganics11020051
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An Efficient Class of Iterative Root-Finding Methods with Applications
Dejan Ćebić, Nebojša Ralević (2021)Dejan Ćebić, Nebojša Ralević. "An Efficient Class of Iterative Root-Finding Methods with Applications" in 2021 IEEE 19th International Symposium on Intelligent Systems and Informatics (SISY), IEEE (2021). https://doi.org/10.1109/SISY52375.2021.9582495
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FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina
... 1 ~ ||gi a)ž 2nd dervate Š | b) JI š š |} š ii s e š H || i š } ž Š | e š - H H 1 a Fi i i NMA 41 “0 — s%0 ~ 300 ~ 3%0 __3MO _1%O0 _ 4M00 00 400 30 3000 3800 2000 Wavenumber (cm') Wavenumber (cm') šžg C), &h ı NA d) . HDTMA š A OE ii |} “ LIJPI | Mig ~FML_R “ š |- L šš s i s BOA ...
... University of Kragujevac on a infrared spectrometer (Equinox 55, Bruker Optics) equipped with a single reflection diamond ATR accessory (Dura Sample IR II, SensIiR). The samples were prepared in a form of KBr disk, and the spectra (averaged on 32 scans) were collected in the range of 4000-450 cm'!, at ...
... Wavenumber {cm ) Wavenumber {cm ') š 18p f) PTMA |j | |ž š \|E a E 13 i - PMV A | i n g"VA/B i g .| š P E Hi )s i . H | Š PONE! š i || || š . } ii |j | ı || || _MO |1 315 /WAW M | - Ć 4000 300 2000 1000 2000 1500 1000 Wavenumber (cm ) Wavenumber (cm } Figure 1. FTIR spectra of a) Na-m ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina" in Book of Proceedings / 3rd International and 15th National Congress Soils for Future Under Global Challenges, 21-24 September 2021 Sokobanja, Serbia , Belgrade : Serbian Society of Soil Science (2021)
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... structure was refined on F2 by full-matrix least-squares techniques using the programs SHELXL.20 Selected bond lengths and angles are presented in Table II. All figures of the crystal structures were prepared using the program VESTA.21 TABLE I. Experimental details. Crystal data Data collection Chemical ...
... Radiation type Mo Kα No. of reflections 528 µ / mm−1 9.39 No. of parameters 40 Crystal size, mm 0.27×0.04×0.04 Δρmax; Δρmin / e Å−3 1.01; - 0.69 Table II. Selected geometric parameters for K3EuSi2O7. Symmetry codes are given in footnotes Bond length, Å Bond length, Å K1‒O1 2.770 (5) K3‒O2xii 2 ...
... O1iii‒Si1‒O2xviii 110.9 (2) O2xviii‒Si1‒O3 110.5 (4) O1ii‒Si1‒O2xviii 110.9 (2) Si1‒O3‒Si1xvii 136.7 (6) O1iii‒Si1‒O3 106.7 (2) ix−y, −y, z; ii−y+1, x−y, z; iii−x+1, −x+y, z; ivy, −x+y, −z; vx, x−y, −z; v−x+1, −x+y, −z+1/2; viix−y, −y, −z+1/2; viiiy, x−1, z; ixy, x−1, −z+1/2; x−x+y, y, −z; xiy ...Sabina Kovač, Predrag Dabić, Aleksandar Kremenović. "Crystal structure of K3EuSi2O7" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC210218026K
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English for Geology Students. 2
Lidija Beko (2023)... E .N2 Reading Comprehension..........ii. OIL AND NATURALGAS....... ttt Vocabulary............. a a Reading Comprehension..........ii ı METALS AND GEMSTONES. ... \orgloyulkto/oooooe o obopooopag abodoao000000 } 0000 0000 Reading Comprehension..........ii c Grammar spot........... ttt Exercises ...Lidija Beko. English for Geology Students. 2, Belgrade : The Faculty of Mining and Geology, 2023
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Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу
Милана Мичета (2024)Подземне воде представљају изузетно важан природни ресурс, као и важну компоненту система, којим је представљено тло. У складу са тим, приликом пројектовања плитких темеља на крупнозрном тлу, односно приликом анализе граничне носивости и слегања, треба узети у обзир и утицај воде. Верује се да ниво подземне воде значајно смањује носивост тла, док се слегања значајно повећавају. Terzaghi (1943) је први сугерисао да се потапањем масе тла, његова носивост смањује за половину, док се слегање удвостручује. Циљ овог рада је ...... = 1 + 0.25 i =l . =1 „=(i-9-(-8) = i,=1 MuzaaHa Muguera, T615/21 npuzor 0p. 6 a) IIpnu cnryuaj HIIB:=0.4m B= m m ii ii | “_ __ ___ –zc—- — —— li i JL ii I Š a Ž bž S| | ci Ppr i 9 | bči | i e Pr ~ s b= |j 4. 7m js - - hi - qrF = c· N-s-dci, +y · Dy · Nasadaqiq ...
... Oakropu Haru0a orrepehema 36or JnejcrBa cune H: Munana Muuecera, T615/21 nupunor Op. 6 a) IIpnu cnryuaj HIIB:=0.4m B= m m ii ii | “_ __ ___ –zc—- — —— li i JL ii I Š a Ž bž S| | ci Ppr i 9 | bči | i e Pr ~ s b= |j 4. 7m js - - hi - Ra/A' = C'Nebcicse + q'Nabaiqsa ...
... 2/74(p)·Š=1+0 sy=1 Oakroput HaruH0a onrepehema: MuznaHna Muuera, T615/21 npuzor 0p. 6 a) IIpnu cnryuaj HIIB:=0.4m B= m m ii ii | “_ __ ___ –zc—- — —— li i JL ii I Š a Ž bž S| | ci Ppr i 9 | bči | i e Pr ~ s b= |j 4. 7m js - - hi - Ra/A' = C'Nebcicse + q'Nabaiqsa ...Милана Мичета. Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу, 2024
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Нове технологије за оживљавање старих текстова
удаљено читање, књижевни корпус, обрада српског језика, анотација врстом речи, лематизација, именовани ентитетиЦветана Крстев, Ранка Станковић, Бранислава Шандрих Тодоровић, Милица Иконић Нешић. "Нове технологије за оживљавање старих текстова" in Зборник радова Међународне научне конференције Дигитална хуманистика и словенско културно наслеђе II, Београд, 28-29 јуни 2021., Београд : Савез славистичких друштава Србије (2023)
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Rudna mikroskopija
Aleksandar Pačevski (2018)Aleksandar Pačevski. Rudna mikroskopija, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2018
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Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4
Lidija Radovanović, Željko Radovanović, Aleksandar Kremenović, Bojana Simović, Milica V. Vasić, Jelena Rogan (2022)In recent years, thermal decomposition studies of transition metal complexes with benzenepolycarboxylate ligands have become an area of a great importance due to the possibility of obtaining useful metal oxides with desirable electrical, magnetic and catalytic properties [1]. As a contrast to conventional methods for the preparation of metal oxides, such as hydrothermal or sol–gel treatment, thermolysis is faster, more efficient ...Lidija Radovanović, Željko Radovanović, Aleksandar Kremenović, Bojana Simović, Milica V. Vasić, Jelena Rogan. "Manganese-pyromellitate complex as a precursor for preparation of spinel Mn3O4 " in XIV Conference of chemists, technologists and environmentalists of Republic of Srpska, Academy of sciences and arts of the Republic of Srpska, Banja Luka, Republic of Srpska, B&H, October 21st-22nd, 2022, University in Banjaluka, Faculty of Technology (2022)
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Interaction of sodium dodecylsulfate (SDS) with homoionic montmorillonites: adsorption isotherms and metal-ion release
The interaction of dodecylsulfate anions (DS−) with homoionic Ca-, Mg-, Ni-, Cu-, Cd-, Pb- and Fe-montmorillonites were investigated. Mg- and Cd-montmorillonite do not adsorb DS−, and an anion exchange at the edges of the clay mineral does not take place. Three different adsorption processes are identified on the other montmorillonites: i) Fe-montmorillonite is covered with amorphous iron hydroxide, and DS−-anions are bound at positively charged sites. ii) On Ca- and Pb-montmorillonite DS− is precipitated as Me(DS)2. iii) On Ni- ...M. Ilic, J. Gonzalez, A. Pohlmeier, H. D. Narres, M. J. Schwuger. "Interaction of sodium dodecylsulfate (SDS) with homoionic montmorillonites: adsorption isotherms and metal-ion release" in Colloid Polymer Science, Springer Science and Business Media LLC (1996). https://doi.org/10.1007/BF00656626
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Properties of fly ash and slag from the power plants
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... oldest and deepest) and Seams II-a, II, I-a and I. Only coal seams III, II and I are (or have been) explored in the Drmno, Ćirikovac and Klenovnik open pits. The average thickness of coal Seam III throughout the whole basin is 19.38m, while it is 1.43m for IIa, 4.14m for II, 1.53m for Ia and 13.90m ...
... quartz-latite tuffs. The Pontian (Upper Miocene) fresh water clastic sediments host three coal seams (KEZOVIĆ, 2011): Seam III or Lower Coal Seam, Seam II or Main Coal Seam and Seam I or Upper Coal Seam, having average thicknesses of 7m, 25m and 11m, respectively. The total thickness of the Pontian se- ...
... classification.– Fuel, 105, 40–76. VASSILEV, S., BAXTER, D. & VASSILEV, C. (2014): An overview of the behaviour of biomass during combustion: Part II. Ash fusion and ash formation mechanisms of biomass types.– Fuel, 117, 152–183. VASSILEV, S., MENENDEZ, R., ALVAREZ, D., DIAZ-SOMOANO, M. & MARTI- ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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Основе конструисања
Бобан Анђелковић, Милош Танасијевић, Филип Милетић. Основе конструисања, Ниш : Универзитет у Нишу - Машински факултет, 2023