Претрага
706 items
-
Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika
Dragana Đurić, Jelena Vukčević, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov . "Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika" in Aktuelna interdisciplinarana istraživanja tehnologije u arheologiji jugoistočne Evrope: zbornik radova / Prvi skup Sekcije za arheometriju, arheotehnologiju, geoarheologiju i eksperimentalnu arheologiju Srpskog arheološkog društva, 28.02.2020., Beograd, Beograd : Srpsko arheološko društvo (2020)
-
Microstructural and magnetic properties of electrospun hematite/cuprospinel composites
Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic MaterialsMira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić. "Microstructural and magnetic properties of electrospun hematite/cuprospinel composites" in Journal of Materials Science: Materials in Electronics, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s10854-020-03526-0
-
Prilog poznavanju režima isticanja vrela Gornji Dušnik, (Suva planina)
Aleksandar Tanasković, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Dušan Polomčić, Ljiljana Vasić, Branislav Petrović (2024)Karstno vrelo Gornji Dušnik nalazi se u istoimenom selu u jugoistočnoj Srbiji, u opštini Gadžin Han. Ovo vrelo drenira zapadne delove Suve planine i kaptirano je za potrebe vodosnabdevanja Gadžinog Hana, kao i sela Gornji i Donji Dušnik. Iako je ovo vrelo kaptirano, sistematska osmatranja isticanja karstnih voda na njemu do sada nisu vršena. U periodu od 1. novembra 1977. do 31. januara 1979. godine, uspostavljen je monitoring na ovom vrelu od strane Geozavoda (merenja vršena sporadično i to ...bilans voda, režim isticanja, autokorelacija, kroskorelacija, spektralna analiza, vrelo Gornji DušnikAleksandar Tanasković, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Dušan Polomčić, Ljiljana Vasić, Branislav Petrović. "Prilog poznavanju režima isticanja vrela Gornji Dušnik, (Suva planina)" in 17. Srpski simpozijum o hidrogeologiji sa međunarodnim učešćem, Pirot, 2-6 oktobar 2024, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2024). https://doi.org/10.5281/zenodo.13739842
-
Prilog poznavanju promena kvalitativnih parametara voda vrela Banje kod Valjeva
Jovana Lončar, Maša Vulović, Veljko Marinović, Branislav Petrović, Radisav Golubović, Vesna Ristić Vakanjac (2024)Zbog nepristupačnosti karstnih masiva i nenaseljenosti slivova karstnih vrela, često se sprovode osmatranja parametara kvaliteta i kvantiteta voda sporadično, po potrebi i to godišnje, sezonski/kvartalno, mesečno, nedeljno. Analize ovako formiranih nizova mogu dovesti do pogrešnih zaključaka, naročito kada se vrše analize ekstrema. Međutim, kada su u pitanju karstne izdanske vode, režim pojedinih parametara može biti jako uslovljen pluviografskim režimom. Najčešći su slučajevi da nakon otapanja snežnog pokrivača, zatim pri kišama jačih intenziteta ili dužih trajanja dolazi do skoro istovremenog ...Jovana Lončar, Maša Vulović, Veljko Marinović, Branislav Petrović, Radisav Golubović, Vesna Ristić Vakanjac. "Prilog poznavanju promena kvalitativnih parametara voda vrela Banje kod Valjeva" in 17. Srpski simpozijum o hidrogeologiji sa međunarodnim učešćem, Pirot, 2-6 oktobar 2024, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2024). https://doi.org/10.5281/zenodo.13740037
-
Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristaluSabina 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
-
Šesnaestokanalni data loger, aplikativni softver
Kričak Lazer, Rikalo Aleksandar, Negovanović Milanka, Mitrović Stojan. "Šesnaestokanalni data loger, aplikativni softver" in TR33003 (2015)
-
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
-
Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization
... proven to be very important from theoretical and practical aspects. Some elements are estab- lished as being essential for human health (Ca, P, Mg, F, Na, K, Cl, Zn, Cu, Se, Mg, Mn, Mo, Fe, I, Cr) (WHO 2011). The concentration of each element in groundwater is to a greater or lesser degree dependent ...
... r with a HP Ge detector, whose relative efficiency was 23 %. The detector was calibrated using standard radioac- tive reference material, MIX–OMH–F. The duration of sample measurements was 1.3 days, depending on the concentrations present. Statistical analysis Each sampling site was characterized ...
... exhibit any specific features regarding the content of mi- croelements. Occurrences with high temperatures also have elevated concentra- tions of Si, F, Li, B, As, etc. Gross alpha and beta activities were naturally low and in some cases below the detection limit (Table 1). REEY concentrations ranged ...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
-
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. ...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
-
Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One
In order to solve serious traffic congestion in Belgrade, a number of studies regarding the Belgrade Metro construction have been carried out since 1973. However, only in 2019, the routes of the future metro lines 1 and 2 were de-fined as a part of the General Metro Construction Project. The lines are de-signed to intersect at the location of Sava Square, where an interchange met-ro station will be built. It represents a complex geotechnical structure consist-ing of three different ...Nemanja Stanic, Dragoslav Rakic, Josip Isek, Slavoljub Simic. "Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One" in Lecture Notes in Civil Engineering, Springer Nature Singapore (2024). https://doi.org/10.1007/978-981-97-8221-5_11
-
Actual contamination of the Danube and Sava rivers at Belgrade (2013)
Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screeningMilan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer. "Actual contamination of the Danube and Sava rivers at Belgrade (2013)" in Journal of the Serbian Chemical Society, National Library of Serbia (2014). https://doi.org/10.2298/JSC131105014A
-
Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash
The aim of this paper is to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction pro¬cedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As and Be) in fly ash extracts were measured by inductively coupled plasma-atomic emission spectrometry. Single-agent extractions of metals were conducted at sonication times of 10, ...leteći pepeo uglja, ekstrakcija sa jednim agensom, sekvencijalna ekstrakcija, mikrotalasi, ultratalasiAleksandra Tasić, Ivana Sredović-Ignjatović, Ljubiša Ignjatović, Marija Ilić, Mališa Antić. "Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash" in Journal of the Serbian Chemical Society, National Library of Serbia (2016). https://doi.org/10.2298/JSC160307038T
-
Status of the geochemical determination of the solar pp-neutrino flux by LOREX
Pavićević Miodrag, Amthauer Georg, Aničin Ivan, Bosch Franz, Boev Blažo, Brüchle W., Cvetković Vladica, Djurčić Zoran, Henning W.F., Jelenković Rade, Pejović Vladan, Weiss A. (2012)Pavićević Miodrag, Amthauer Georg, Aničin Ivan, Bosch Franz, Boev Blažo, Brüchle W., Cvetković Vladica, Djurčić Zoran, Henning W.F., Jelenković Rade, Pejović Vladan, Weiss A.. "Status of the geochemical determination of the solar pp-neutrino flux by LOREX" in Neutrino 2012, Kyoto, Japan: (2012): 1-15
-
Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers
This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd... dependent variables, level of significance a < 0.05. The correlations were evaluated using the coefficient of significance F and P-value. As presented in Table 1, the significance value F of the correlation coefficient and P-value is less than 0.05. Therefore, the Pearson linear correlation coefficient ...
... the sample in Mg/m*. 30 a % - b 200 - ii D tl/(:· AŠ |=} 180 - 70 //E?] “ (-P-4"| AAJA N B D/_T'Jč, ___160 – A “A Ee . PrO M “ A Š Š D n f Č ĆA A -- o B 140 ; _ [- Ž . A a 50 M ~ : AAA AA n 070 - BI A AAAA %Ž mpon-- D A Z AA _ |j A 0 7 O A ŠA -& W m 1 l 100 _Z A a A |} A 30 ...
... 0.862478005 Standard error 5.062052668 12.52554984 3.552758725 Observations 50 50 50 P-value 2.19964E-19 7.42876E-20 9.69400E-27 Significance F 3.29677E-19 2.44059E-17 1.56729E-22 E,„, =1.3976CBR„,, +73.649, R =0.7788, (8) E,, =0.5355CBR.,, +30.476, R* = 0.8653. (9) The modulus of deformation ...Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović. "Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers" in Soil Mechanics and Foundation Engineering, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s11204-024-09939-x
-
Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty
Miloš Gligorić, Jelena Majstorović, Suzana Lutovac. "Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty" in Underground Mining Engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2018). https://doi.org/10.5937/PodRad1832001G
-
Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji
Системи даљинског грејања постоје у 57 градова и општина у Србији и доминантно користе фосилна горива. У овим урбаним срединама су изграђени, или се планира градња система за пречишћавање отпадних вода. У раду је размотрена (са еколошког и енергетског аспекта) могућност додатног, енергетског коришћења топлоте пречишћене воде у СДГ, применом топлотних пумпи. На примеру Шапца је извршено поређење постојећег СДГ са системом који би применом топлотних пумпи искористио енергетски потенцијал система за пречишћавање отпадних вода. Добијени индикатори су послужили ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević . "Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji" in Stručno-naučna konferencija TOPS 2019, Poslovno udruženje toplana Srbije (2019)
-
Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines
The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...... described in Error! Reference source not found. [9]: Table 2. Advantages and disadvantages of the IPCC systems System Advantages Disadvantages F IP C C 1. Traditional plants can simply be modified in order to be used as in-pit crushers. 2. Reducing maintenance costs because there is no ...
... height is more significant because of the higher dump point bench level 4. Large retaining wall 5. Long bench strikes and width in mine plan S F IP C C 1. Traditional plants can be simply modified in order to be used as in-pit crushers 2. Reducing maintenance costs because there is no ...
... height due to the higher dump point bench level, which requires extensive bench-retaining walls 3. Long bench strikes and width in mine plan F M IP C 1. Elimination of truck transport 2. Reduced number of stuff 3. Avoidance of high truck maintenance costs 4. Reduction of mine traffic ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković. "Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines" in 8th International Conference MIining And Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
-
Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication
... WigWsuss 6) . - 4 3 |A| jA - 1 F I T H E M T T |ma T i HE - jmu[sSmu gima[3i s s LJ |_| Af|_|[| f > || |A ||__[ |A| r L I LITI |I | _ fi4 | } || | f|| Fj || LI |_IF-|}_PF-}__| |_| |_ ffi4f| f|0 | _| |_ |_f|4 Hi LI | |}- -} ...
... specimen S47.1 characterised by discordant ribs at the outer end of the valve; layer 47. F, Beyrichilamellaptychus beyrichi (Oppel, 1865), specimen 99/1; layer 99. Scale bar equals: A, C 10 mm; B, 20 mm; D-F 30 mm. 'JD 3 2 u2 1d my S d '2 1A 0u 24 qD y '( "2 21 SD A 'Z EC 9S OI ...
... Bulletin de la Socićtć gćologique de France, (series 3) 18, 560-629. Toula, F., 1891. Prvi izveštaj o ekskurziji od Golupca do Donjeg Milanovca. Geološki anali Balkanskoga poluostrva 3, 318—321 (in Serbian). Trauth, F., 1935. Die Punctaptychi des Oberjura und der Unterkreide. Jahrbuch der Geologischen ...Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović. "Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication" in Cretaceous Research (2023). https://doi.org/10.1016/j.cretres.2023.105623
-
Анализа утицаја искоришћења у преради на резултате оптимизације површинских копова
Стефан Митић (2024)Одређивање оптималних граница површинског копа је сложен и итеративни процес који захтева мултидисциплинарну експертизу, софистициране технике анализе и пажљиво разматрање геолошких, рударских, економских,техничких, еколошких и друштвених фактора. Оптимизација подразумева генерисање серије шкољки, површинског копа на основу различитих фактора прихода (Revenue factor) са итеративним кораком промене цене метала у односу на базну цену. Свака генерисана шкољка представља инкрементално повећање запремине резерви према инкременталном повећању продајне цене метала. Велики број техно -економских фактора утиче на овај процес, и промена сваког од њих ...оптимизација површинског копа, анализа границе копа, оптимална контура копа, лежиште Бувач, профит, искоришћење у преради, трошкови прераде руде... Adjustment Factors ONone (8 Mođel CCalculate: - Rock Type Detait: ocktpo Viring Rozevorf Fraclon Mnng Diiwion Fract n 77 Renab Coct |} | | 096 f.| [] | T T og f [ Cnnuka 5.86. Ilanen sa ynoc noa0amaka o npouecy omkonasatba y P/hittle codjm6epy V raOenH OCHOBHMX yJa3HHMX mapaMeTapa (mađ0e/a 2.3) ...
... metnoG. Cuko i ng cpg | Processig Pa Salng | Name Proc.Cost u [ Raked c Lowdcul Tiresn d Optruaton | GMSUM 542 f Edt Comstrants | ___Fe (onmej o Ž 74 - 32| | [6p Ppressons | |D_MSID 542 f. |O serEement| |__Feđomme) o Ž 74 7 – a| . Outut Block processing cost acjustment Tactors- |O None (8)Mode ...
... aaaaaaaaaaaaaaaaa a aaaanaeaaaaaeeaaaaaaaaaaaataaaataeaeaeaaeaevaNeNeNtNet 4 2.1.1 OnrHMaJIHa KOHTyp2a HOBPIHHHCKOT KOIIA ... aaanaeanekaeataakee 8 2.1.2 F eOJIOHIKH OJIOK MOJIĆJI.....Sdaaaaaanaaaa da aaad a aduattvı 10 2.1.3. EKOHOMCKH OJIOK MOŽIĆJI „..SSdaaaaaaannaaanaa davvv aaauuttvı 18 2.2. MareMaTHuKH ...Стефан Митић. Анализа утицаја искоришћења у преради на резултате оптимизације површинских копова, 2024
-
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