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Упит dcterms_creator_txt:Gaćina R

784 items

  • Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra

    Aleksandar Milojević (2024)
    Nakon radova otvaranja i početka eksploatacije, rudno telo bakra velikih rezervi zahteva i veliku količinu eksploziva da bi se ostvario zacrtan kapacitet. Samim tim, neophodno je izraditi funkcionalan magacin eksploziva koji će biti pristupačan svim horizontima i koji će moći da ispuni celokupni kapacitet svih horizonata. Obzirom da će se u magacinu skladištiti eksploziv, on mora ispunjavati specijalne uslove kako bi skladištenje bilo bezbedno. Neophodno je isprojektovati magacin tako da ispuni sve zahteve po pitanju količine i načina skladištenja eksploziva, ...
    podzemna eksploatacija, ležište bakra, magacin, eksploziv
    ... patrona po bušotinama (komore za smeštaj eksploziva i detonatora) E .R o l [ 55 . e | e | o < P G 2| bn l o o Š Š q | +<|+ [ p R-i-i x O dvl |S |R 9 3 5| bp -| M.| O x . O . B | 9 r l a | — - - A es o|oo 5 = _ | G [=\} + —=|aq ...
    ... = o | a | a q E e | e] W l » o r u 8 g M Đ s & 8 ~ | G e _ | - | = ~ - W : : 1 --| w n | c yVaj 5% „ o l Nea P O .I bn a | r m Zi|wva S O Š Š a | = | < + - R-i-i d% | R 9 4 5| bp ubusabi = . B | 8 | a | — ...
    ... |O e = | w | |6 % = o [5] % = O A R o l o 5 3 8 5 5 8 R = N i S C Z l a q | - % o|.5 - H S i - | i = = v m & o s a | a q Ri N o |= |} = = o % : |2i % Š = Pp Đ = B E I S m d « s | ZI R B J R + o |a_|o|g [::| V . m m m . | ...

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    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 ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... vitro Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The influence of Al3+ion on porcine pepsin activityin vitro | Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija ...
    ... of AP? ion, the electrophoretic mobility of pepsin under the physio- logical conditions the obtained R. value for pepsin is 0.47 while in the presence of 1, 5 and IOmM Al ions the obtained R. values were 0.46, 0.44 and 0.42, respectively. It is obviously that the highest concen- tration of ...
    ... tic mobility. Electrophoretic mobility of haemoglobin in the absence of ALF?* ion was characterized with R. value of 0.20, while in the presence of 1,5 and 10mM Al ions the obtained R. values were 0.20, 0.20 and 0.19 respectively. The presence of all investigated concentration of aluminium ...

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција

  • Sustainable environmental development after the cessation of mining activities at the cathode copper production complex Kazandol-Valandovo, R. Makedonija

    Бошевски Трајче, Јовановић Бранка, Праштало Жељко, Радосављевић Милинко, Чановић Владан, Чолаковић Виолета, Димитријевић Бојан (2017)

  • Development of terminological resources for expert knowledge: a case study in mining

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Aleksandar Cvjetić (2015)

  • Supstitucione reakcije Pd(II) kompleksa sa biološki važnim biomolekulima

    Aleksandar M. Mijatović, Jovana Bogojeski (2017)
    Kompleksi Pd(II), supstitucione reakcije

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... i i f x y z c R x x y y z z          (3)        2 2 2 2 1 , , , , , n s s s d i s s s i f x y z x y z d c R x x y y z z               (4)        2 2 2 3 1 , , n s s s s i m s m s m s i f x y z s c R x x y y z z   ...
    ...            (5) has to be minimized, subject to     max 2 2 i i i z z r x x y y      (6)     max 2 2 s s s z z r x x y y      (7)     max 2 2 m s m s m s z z x x y y       ...
    ... YU ISSN 03542904 34 Gligorić Z.; Ganić A.; Tokalić R.; Milutinović A. 1. INTRODUCTION When deposit is composed of few ore bodies it is necessary to interconnect them into one integrated system ...

  • Petrološke karakteristike dunavskog šljunka (Beograd – Zemun)

    Miloš Mihajlović (2024)
    Dunavski šljunak u okolini Zemuna karakterističan je za obalne rečne naslage formirane dugotrajnim procesima erozije i transporta materijala koje reka Dunav nosi sa različitih područja uzvodno. Ispitivanja šljunka sa lokacije „Gemax” su pokazala je šljunak uglavnom zaobljen, najčešće u rasponu od nekoliko milimetara do nekoliko centimetara u prečniku. Kako Dunav nosi materijal sa velikog sliva, ovaj šljunak sadrži raznovrsne sastojke sa dominacijom kvarca i odlomaka stena visokosilicijskog sastava. Mineraloško-petrografska ispitivanja pokazala su prisustvo klasta različitog sastava, čime je potvrđena ...
    Dunav, šljunak, mineraloško-petrografska ispitivanja, građevinarstvo
    ... navedene pod r. br. 18) Žujović, J., 1900: Geologija Srbije II, Eruptivne stene. str. 225, Beograd. (Preuzeto iz literature navedene pod r. br. 18) Žujović, J., 1905: Novi nalasci mamutovih zuba u Beogradu. Zap. Srp. geol. dr. knj. III (Zbor CX), Beograd. (Preuzeto iz literature navedene pod r. br. 18) ...
    ... iz literature navedene pod r. br. 18) Gorjanović, D., 1923: Morfološke i hidrogeografske prilike prapornih prijedela Srema, te pograničnih česti županije virovitičke. Glasnik Hrvatsk. prirodosl. društva, knj. XXXIV. sv. 2. Zagreb. (Preuzeto iz literature navedene pod r. br. 18) Dimitrijević, B ...
    ... mastodona na Banovom brdu kod Beograda. (Preuzeto iz literature navedene pod r. br. 18) Žujović, J., 1889: Osnovi za geologiju Kraljevine Srbije. Geol. anali Balk. pol. knj. I, Beograd. (Preuzeto iz literature navedene pod r. br. 18) Žujović, J., 1893: Kongeriska etaža u Rakovici. Geol. anali Balk ...

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... a n i d e s M o e s i a n M o e s i a n P m l a t r f o P m l a t r f o T F T F TFTF C F C F M o r a v a V a l l e y C o r r i d o r M o r a v a V a l l e y C o r r i d o r Jastrebac Mts.Jastrebac Mts. Vršac Mts.Vršac Mts. Western Vardar Adria-derived nitsU ...
    ... G ora S redna G ora Zone Zone S o u t h C a r p a t h i a n s S o u t h C a r p a t h i a n s ZagajicaDepression ZagajicaDepression P an nonian Basin P an nonian Basin S e r b ia n C a r p a t h i a n s S e r b ia n C a r p a t h i a n s B a l k a n i d e s B a l k a ...
    ... The green arrow marks the tectonic contact with normal sense of shear between the two units. SUPRAGETIC UNIT N E O P R O T E R O Z O IC T O P A L E O Z O IC L O W E R NORTHERN SERBO-MACEDONIAN SUBUNIT G γ Sm Sm Mi M M A Q Q Q Gs Q Q Gs Gs- chlorite-sericite schists, phyllites ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    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 ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori

  • An Italian-Serbian Sentence Aligned Parallel Literary Corpus

    Saša Moderc, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić (2023)
    This article presents the construction and relevance of an Italian-Serbian sentence-aligned parallel corpus, delving into the aligned sentences in order to facilitate effective translation between the two languages. The parallel corpus serves as a valuable resource for language experts, researchers, and language enthusiasts, fostering a deeper understanding of linguistic nuances and cultural expressions. By bridging the gap between Serbian and Italian, this corpus opens new avenues for cross-cultural communication and collaboration, and ultimately contributes to the improvement of language-related ...
    Aligned corpus, parallel corpus, Serbian, Italian, literature

  • The Karavansalija Mineralized Center at the Rogozna Mountains in SW Serbia: Magma Evolution and Time Relationship of Intrusive Events and Skarn Au ± Cu–Pb–Zn Mineralization

    J. Hoerler, Albrecht von Quadt, R. Burkhard, Irena Peytcheva, Vladica Cvetković, T. Baker (2022)
    rudna ležišta, egzo-endoskarn, CA-U/Pb TIMS datiranje, Balkansko poluostrvo, magmatizam, kraktorajni magmatizam

  • Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)

    M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)
    Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...
    Stratigraphy,Economic Geology,Geology,Fuel Technology

  • Uticaj geološke neizvesnosti u razvoju rudarskih projekata

    Petar Marković, Dejan Stevanović, Mirjana Banković (2023)
    Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...
    ... razrađivali mnogi autori u poslednjih 20 godina (Dimitrakopoulos R., 2018) (Armstrong M. et al., 2021) (R. Goodfellow, R. Dimitrakopoulos, 2013) (G. Lagos et al., 2011) (Goodfellow R., Dimitrakopoulos R., 2016) (Benndorf, J., Dimitrakopoulos, R., 2013). MOGUĆI MODELI LEŽIŠTA STVARNO ALI NEPOZNATO LEŽIŠTE ...
    ... Mineral Reserves. Canadian Institute of Mining, Metallurgy and Petroleum. [5] Dimitrakopoulos R. (2018). Advances in Applied Strategic Mine Planning. Springer International Publishing. [6] Dimitrakopoulos, R., Farrelly, C. T., and Cheuiche Godoy, M. (2002). Moving forward from traditional optimization: ...
    ... planning for an open-pit mining problem under ore-grade uncertainty. Electronic Notes in Discrete Mathematics , 31, 15-20. [10] Goodfellow R., Dimitrakopoulos R. (2016). Global optimization of open pit mining complexes with uncertainty. Applied Soft Computing , 40, 292-304. [11] Kolonja B., Stevanović ...

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)
    Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...
    Rotorni bageri, revitalizacija, SRs1200

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... Tabela 4-15, ELECTRE model, matrica agregatne dominacije T1 T2 T3 T4 R a n g T1 1 1 0 1 T2 0 0 0 2 T3 0 0 0 2 T4 0 0 0 2 Tabela 4-16, AHP model, normalizovana (konačna) matrica A t r i b u t Rezu- ltat R a - n g K1 K2 K3 K4 K5 K6 K7 K8 min/max max max max max max max max max ...
    ... 1st edition, 2011, 349. 90. Ulstein N. L., Christiansen M., Gronhaug R., Magnussen N., Solomon M. M., Elkem Uses Optimization in Redesigning Its Supply Chain, Interfaces, Vol. 36, No. 4, July–August 2006, 314– 325. 91. Venkata R R., Decision Making in the Manufacturing Environment: Using Graph Theory ...
    ...            2 2 max ,max 0 , Iza R bar Iza bad j j j (3.7) Gde je: I2 - Skup svih kriterijuma po kojima je alternativa a lošija od alternative b; Rj - Maksimalni raspon ocena za svaki kriterijum; i r(a,b) - Razlika ocena kriterijumskih vrednosti alternative ...

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... Tabela 4-15, ELECTRE model, matrica agregatne dominacije T1 T2 T3 T4 R a n g T1 1 1 0 1 T2 0 0 0 2 T3 0 0 0 2 T4 0 0 0 2 Tabela 4-16, AHP model, normalizovana (konačna) matrica A t r i b u t Rezu- ltat R a - n g K1 K2 K3 K4 K5 K6 K7 K8 min/max max max max max max max max max ...
    ... 1st edition, 2011, 349. 90. Ulstein N. L., Christiansen M., Gronhaug R., Magnussen N., Solomon M. M., Elkem Uses Optimization in Redesigning Its Supply Chain, Interfaces, Vol. 36, No. 4, July–August 2006, 314– 325. 91. Venkata R R., Decision Making in the Manufacturing Environment: Using Graph Theory ...
    ...            2 2 max ,max 0 , Iza R bar Iza bad j j j (3.7) Gde je: I2 - Skup svih kriterijuma po kojima je alternativa a lošija od alternative b; Rj - Maksimalni raspon ocena za svaki kriterijum; i r(a,b) - Razlika ocena kriterijumskih vrednosti alternative ...