Претрага
1156 items
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Mineralogy and thermal properties of clay from Slatina (Ub, Serbia)
Milošević M., Logar M., Kaluđerović L., Jelić I.. "Mineralogy and thermal properties of clay from Slatina (Ub, Serbia)" in Geophysical Research Abstracts Geophysical Research Abstracts 19, Vienna, Austria:Copernicus Publications (2017): 2044
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Istraživanje faune makrozoobentosa u izvorima
K. Belanović, I. Živić, Z. Marković, Ilić Marija, M. Radulović, M. Živić. "Istraživanje faune makrozoobentosa u izvorima" in Rizici i eko -bezbednost u postmodernom ambijentu -Internacionalna konferencija, septembar 19-12 jun, Novi Pazar, Novi Pazar:Državni univerzitet u Novom Pazaru (DUNP) (2010): 89-97
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A contribution to Jovan Cvijićs consideration of the Visočica river source
Nikić Zoran, Dokmanović Petar, Anđelić M, Lekić M. "A contribution to Jovan Cvijićs consideration of the Visočica river source" in Book of Abstracts of International Scientific Conference 150th ANNIVERSARY OF JOVAN CVIJIĆS BIRTH, Beograd:Serbian Academy of Sciences and Arts, Geographical institute “Jovan Cvijić” (2015)
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Mandible shape differentiation between Mammuthus trogontherii and M. primigenius and mandible shape ontogeny in M. primigenius specimens from Serbia: A preliminary explorative geometric morphometric study
Paunović Gordana, Bogićević Katarina, Urošević Aleksandar. "Mandible shape differentiation between Mammuthus trogontherii and M. primigenius and mandible shape ontogeny in M. primigenius specimens from Serbia: A preliminary explorative geometric morphometric study" in Quaternary International no. 443 (A) (2017): 212-220. https://doi.org/https://doi.org/10.1016/j.quai
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Linear-motor plunger pump increases lifting efficiency
Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev. "Linear-motor plunger pump increases lifting efficiency" in Oil & Gas Journal (2022)
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... function of the formation volume factor, the oil formation volume factor Bo (m*/m*), and the water formation volume factor Bw (m?/m?): qo+qw 32 n qoBo+qwBw — qo - oil production, (m*/m*) — qw- water production, (m?/m?) If all the gas passes through the pump, the volumetric efficiency increases ...
... Wi I I I I I I | I I I I I I -š i •— i m. m.s..mn .:wš·.m w m j m m·:.·&·n.•um·,!_&· “ m MALULIKKKIKI ı- - K -. | i WLa| — . } _ || || -8 ı- | || || | m ” l I I I I I I I I _\n S E I K K N K U E - y r ...
... lo ci ty (m /s ) e PR Ve lo ci ty (m /s ) e 0 MK 2 % “ M O NM M % 0 '#4”Rn 8 3 ć&s20 x 16 20 &&340 28 «' «%#%O PR Positon (cm) Crank Angle (degrees) Plunger Veloctty Plot Maximum Upstroke Polished Rod Velocity (m/s) : ,638 Maximum Downstroke Polished Rod Velocity (m/s) : 651 Maximum ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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The Early Middle Palaeolithic in the Balkans. The case of Velika and Mala Balanica (Serbia)
Mihailović, D., Belen Marín-Arroyo, A., Bogićević Katarina, Morley, M. & Roksandić, M.. "The Early Middle Palaeolithic in the Balkans. The case of Velika and Mala Balanica (Serbia)" in European Society for the Study of Human Evolution (ESHE). Inaugural Meeting, 23-24. September, Leipzig, Germany. (2011): 71-71
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Properties and characterization of a clay raw material from Miličinica (Serbia) for use in the ceramic industry
Milošević M., Logar M. (2017)Milošević M., Logar M.. "Properties and characterization of a clay raw material from Miličinica (Serbia) for use in the ceramic industry" in Clay Minerals 52 no. 3, UK:The Mineralogical Society (2017): 329-340. https://doi.org/https://doi.org/10.1180/claymi
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Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević, Dejan Stevanović (2024)The selection of the optimal equipment for discontinuous haulage systems is one of the most important decisions that need to be made when an open-pit mine is designed. There are a number of influencing factors, including natural (geological and environmental), technical, economic, and social. Some of them can be expressed numerically, in certain units of measure, while others are descriptive and can be stated by linguistic variables depending on the circumstances of the project. These factors are characterized by ...Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević, Dejan Stevanović. "Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization" in Sustainability, MDPI (2024). https://doi.org/doi.org/10.3390/su16083156
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Development of an integrated model for open-pit-mine discontinuous haulage system optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović . "Development of an integrated model for open-pit-mine discontinuous haulage system optimization" in Sustainability, MDPI (2024). https://doi.org/10.3390/su16083156
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Hidrogeološke karakteristike i ocena bilansa Ravaničkih krečnjaka
Andrijana Stanišić (2024)Hidrogeološka problematika koja se vezuje za složene uslove cirkulacije podzemnih voda u karstu kao i kompleksnost karakterizacije karstnih izdanskih voda, predstavljaju ključne faktore za usmeravanje ka istraživanju karsta i definisanje teme završnog rada. Tematikom rada obuhvaćene su prvenstveno hidrogeološke karakteristike područja istraživanja a zatim i analiza elemenata režima i bilansa podzemnih vodnih resursa u cilju njihove pravilne valorizacije.Zapadni krečnjački pojas Karpato-balkanskog luka odvojen je od mezozojskog kompleksa Kučajsko-beljaničkog masiva navlakom crvenih permskih peščara, koja se nastavlja na krepoljinsko-senjsku zonu ...karstni tip izdani, bilans podzemnih voda, podzemno isticanje, sifonalna cirkulacija, Ravanički krečnjaci... sa pećinskim ulazom širine 8 m i visine 1.2 m, iza koga se nalazi prostrana dvorana dužine 40 m i širine 15 m. Iza kanala nastavlja se prostrana dvorana dužine 40 m i širine 15 m. Iza dvorane se nastavlja kanal dužine 57 m. Ukupna dužina Alovske pećine iznosi 143 m. 34 5. Pećina na vrelu Grze ...
... se na visini od 200 m iznad toka Crnice (621 mnm). Ulaz u pećinu ima oblik kalote širine 4 m i visine 3 m. Pećinu čini kanal čija visina postepeno opada, da bi nakon 14 m iznosila manje od 0.4 m. Kanal je jednostavnog oblika orjentacije Z-I. Ukupna dužina kanala iznosi 14 m. Pećina nema aktivnu ...
... se na oko 5 m iznad suve doline, u desnoj obali. Sam ulaz se nalazi u podnožju odseka visine oko 8 m, složen je i sastoji se iz dva ulaza. Glavni ulaz je grubo trougaonog oblika, visine 2 m i širine u dnu 1.5 m. Drugi sekundarni ulaz je u vidu široke pukotine visine 2 i širine 0.53 m. Glavni kanal ...Andrijana Stanišić . Hidrogeološke karakteristike i ocena bilansa Ravaničkih krečnjaka, 2024
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Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela
Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić (2010)Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić. "Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela" in Vodoprivreda 42 no. 04-Jun, Beograd : Jugoslovensko društvo za odvodnjavanje i navodnjavanje (2010): 223-235
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Application of ERT in the study of debris-flow source area: Case study Selanac debris flow
... at 455000 m 3 strated to flow in two day period (Krušić et al., 2018).The position and area of debris flow was determined by remote sensing technique (Đurić et al., 2017) and confirmed and analyzed in detail by field work. Debris flow stretched 1.5 km with a width of more than 350 m (Figure 1/a) ...
... with the main scarp height at 30 m as its deepest part (Figure 1/b). The the main scarp zone is mainly is composed of weathered material that consists of limestone, sandstone and diabase, with fragments of heterogeneous material that range from cm 3 up to some m 3 in volume (Krušić et al., 2017; ...
... profile was positioned above the main scarp (Figure 1/c) on the relatively flattened area, with visible cracks. The profile was 295 m long, with electrode spacing of 5 m. We have used Wenner array for data acquisition. To obtain an electrical resistivity tomography, the apparent resistivity values ...Dragana Đurić, Jelka Krušić, Biljana Abolmasov. "Application of ERT in the study of debris-flow source area: Case study Selanac debris flow" in 11th Congress of the Balkan Geophysical Society, Volume 2021, Online-Romania, 10 -14. Oct 2021,, European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202149BGS15
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Analysis and visualization of geophysical well-logging data from closely spaced boreholes
Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...... Mutnte TpkajteckH Np Baapa HayaQ /leca CrtacoBcka M-p Mapuja CrojaHoBa, Canrto I eoprHeBckH M-p Kuka IHInparoBa /leauc I eoprHeB M-p Mapuja MaugeBa, /laMurap I eopraeB M-p CrojaHue HHKOJIOB BaHuo AHreJIoB M-p Ewait IerpynteB, VcenH Baratmron M-Pp IIenuo PacTeBcCKH TexuHuuku ype/JiHuHk: HnpuHia ...
... to n( m) Detance (m) Figure 1. Integration of 1D log data Kom boreholes into 2D view. Examples: (a) gamma ray and (b) spontaneous-potential logs. Sn-Gamma (b) R a 4 Sp-Gamma (a) Pwat3 Ele vat ion ( m). Ele vat ion ( m) Ele vat ion ( m) o 5 t 0820 25 Distance (m) 0 5 ...
... MakeJIOHCKO TČOJIOHIKO JIpyITTBO IynaBHH H 0JIT0OBOpHu ype/iHuHiH IIpoQ. m-p Tonop Cepa(Q)HMoBckH H IIpoQ. m-p Bnaxo Boen Opranu3anuckKu o0/10o0p: IIpoQ. n-p Coma JIenarKoBa M-p /lgHMurap IIerpoB IIpoQ. n-p Munopajn JOBaHOBCKH ~ M-Pp 3aTKoO IIenTeKOBCKH IIpoQ. n-p Fopru JUHMoB, Ooperr duuc IIpodo ...Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov. "Analysis and visualization of geophysical well-logging data from closely spaced boreholes" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)
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Numerical modeling of Selanac debris flow propagation using SPH code
The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
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Characterization of clays from Slatina (Ub, Serbia) for potential uses in the ceramic industry
Milošević M., Logar M., Kaluđerović L., Jelić I.. "Characterization of clays from Slatina (Ub, Serbia) for potential uses in the ceramic industry" in Energy Procedia Energy Procedia 125, :Elsevier (2017): 650-655. https://doi.org/10.1016/j.egypro.2017.08.270
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Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva
Ljiljana M. Vasić (2017-07-14)postupaka koji je primenjen u cilju definisanja zona prihranjivanja i veze izmeđupodzemnih i površinskih voda, vremena koje voda provede u podzemlju, pri čemu seformira jedinstven hemijski sastav i temperaturni režim isteklih voda, bili su polaznaosnova za usmerenje na istraživanje karsta i definisanje teme doktorske disertacije.Kučajsko-beljanički masiv se nalazi u istočnoj Srbiji i pripada oblasti Karpatobalkanskogluka i idealan je poligon za istraživanje, obzirom da se u okviru njega nalazejaka karstna vrela i pojave toplih karstnih izvora na relativno malom rastojanju, ...karstni sistemi, geneza podzemnih voda, izotopske metode, starost voda,hidrogeohemijski procesi, dubina cirkulacije podzemnih voda, subtermalne i termalnevodeLjiljana M. Vasić. "Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-07-14)
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Uslovi formiranja oticaja reke Crnice
Andjelija Glogovac (2024)Sliv reke Crnice zauzima područje centralnog dela Srbije, između opštine Paraćin na zapadu, Sisevačkog basena na istoku, sliva Ravanice na severu i Jovaničke reke na jugu.Režimski parametri sliva reke,površine od 289 km2 kontrolišu se na hidrološkoj stanici Paraćin, dok su sa ciljem analize režima i uticaja padavina na formiranje oticaja preuzeti podaci o padavinama sa meteorološke stanice Ćuprija.Na razmatranom području dominantnu ulogu ima karsni tip izdani, koga karakteriše nestabilan režim u u pogledu oscilacija izdašnosti i nivoa podzemnih voda ...... proticajem koji je iznosio 30,20 m“/s. Na dijagramu unutar godišnje raspodele (slika 3.4.) najveće vrednosti proticaja javljaju se u u aprilu (7.62m*/s) i martu (7.43 m?/s). U proseku, najsušniji meseci su septembar (1.23 m?/s), oktobar (1.25 m”/s) i avgust (1.49 m?*/s). 17 Slika 3.2. Podomerna ...
... (m m) Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. 2010. 2010. 2010. 2010. 2010. 2010. 2010. 2010. 2010. 2010. 2010. 2010. m — s Padavine - Ćuprija v.s. Paraćin Slika 7.14. Hidrogram proticaja sa padavinama, 2010. godina Pr ot ic aj Q (m ?/ s) Pa da vi ne (m m) ...
... pomenute Jednačine. 64 10. LITERATURA 1. Antonijević I., Veselinović M., Đorđević M., Kalenić M., Krstić B. i Žagubica L 34-140, Savezni geološki zavod, Beograd. 2. Dolić D., Kalenić M., Marković B., Dimitrijević- M., Radoičić R. i Lončarević Č. (1978). Osnovna geološka karta 1:100 000, Tumač ...Andjelija Glogovac. Uslovi formiranja oticaja reke Crnice, 2024
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Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik
Jovana Jović (2024)Završni rad sa temom ,,Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik” sastoji se iz opšteg i specijalnog dela. OPŠTI DEO sadrži: U opštem delu dato je: Uvod, Geografski položaj i istorijski razvoj rudnika "Rudnik", kratak prikaz geologije ležišta i eksploatacije rude kao i opis tehnološkog procesa flotacije rudnika “Rudnik”. SPECIJALNI DEO sadrži:U specijalnom delu dato je:Cilj istraživanja, teorijske osnove usitnjavanja, Bondov radni indeks, metode ispitivanja uzoraka, uzorkovanje i obrada uzorka; Metode ispitivanja; Rezultati ispitivanja po standardnom Bondovom postupku i po ...Bondov radni indeks, standardni postupak, skraćeni postupak, ruda olova, bakra i cinka, rudnik „Rudnik“... dužine L = 5 m, širine B = 6 m i visine H = 4 m, koji se nalaze ispod svakog filtera kao i posebna zgrada sa četiri betonska boksa napravljena u neposrednoj blizini postojećih bunkera koncentrata. Utovar i otprema koncentrata Utovar sva tri koncentrata se vrši utovarivačem marke ULT-220 u kamione ...
... Prečnik kondicionera Pb ıi Cu koji se nalaze u pogonu flotacije rudnika "Rudnik" iznosi D = 3,0 m, a njihova visina je H = 3,0 m. Prečnik kondicionera Zn u ovom pogonu Je D = 2,5 m i njegova visina Je H = 2,5 m. 2.4.3.2 Flotacijska koncentracija Sam proces flotacijske koncentracije obuhvata pet faza: ...
... (Nx), prema formuli: n k, = N—hl[R1 + (M – R,)X| – InR» 2 11. Odsevu (R>)iz prvog eksperimenta dodati sveži uzorak mase (M — R). 12. Izračunati broj obrtaja za treći eksperiment mlevenja (Nx), prema formuli: 2,5 In[R, + (M – &,)X| — 1113'5 k M N.=n , [obrtaja| 13. Ovako pripremljeni ...Jovana Jović. Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik, 2024
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Phase relations and physical indicators of municipal waste from old landfills in Serbia
Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science... Unit Relations Unit weight Y kN/m) Y=W/V=(I+w) ·Ya Void ratio e mš/m* e= V /V, = | ___I-n Unit weight W a of solid A kN/m* E i ——— particles Vs 1-n 'Volume water v m*/m* v= V Zw.J0 content -% V Yw Volume gas a m*/m* a _&_ n_w content -% a Saturation g m*/m* S =&=X degree ii -% ii Vp ...
... taken was 1.0 – 12.0 m), values ranged in a wide interval of y = 9.5 — 17.6 108 kN/m, It can be seen that the values are in the domain of possible values of waste unit weight that correspond medium to well compacted waste (Figure 6). unit weighty (kN/n») unit weight y (KN/m*) 15 20 5 0+ E ...
... Ikodinović, Jovana M Janković, Tina D Đurić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Phase relations and physical indicators of municipal waste from old landfills in Serbia | Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić ...Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić. "Phase relations and physical indicators of municipal waste from old landfills in Serbia" in Japanese Geotechnical Society Special Publication, The Japanese Geotechnical Society (2021). https://doi.org/10.3208/jgssp.v09.cpeg016