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Упит dcterms_creator_txt:Seyed Ali S. Razeghi

1131 items

  • Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS

    Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan (2021)
    Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...
    agregatne zamene, održavanje, mehanizacija, Benefit Cost analiza
    ... P : I B T O s is te m T Z P : II B T O s is te m T Z P : II I B T O s is te m P o lj e D /E : Iа B T O s is te m P o lj e D /E : II B T O s is te m P o lj e D /E : IV B T O s is te m P o lj e D /E : V B T O s is te m P o lj ...
    ... /C : I B T O s is te m P o lj e B /C : II B T O s is te m P o lj e B /C : IV B T O s is te m P o lj e G : I B T O s is te m R a d lj e vo : I B T O s is te m D rm n o : I B T O s is te m D rm n o : II B T O s is te m D rm n o ...
    ... o : II I B T O s is te m D rm n o : IV B T O s is te m D rm n o : V B T O s is te m D rm n o : V I B T O s is te m P o lj e B /C : B T S P o lj e D : B T U P o lj e D : B T S P o lj e G : B T D T Z P : I B T D T Z P : II B ...

  • NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands

    Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)
    Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...
    Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry
    ... Medicine, S. Markovića 69, 34000 Kragujevac, Serbia a r t i c l e i n f o Article history: Received 9 April 2012 Received in revised form 15 September 2012 Accepted 19 September 2012 Available online 27 September 2012 Keywords: Ruthenium(II) Complexes Substitution Kinetics NMR study a b s t r a c ...
    ... isotope effect by adding Fig. 1. Structure of the [Ru(terpy)(bipy)(H2O)] 2+ complex. HOOC O N N H SH COOH H ONH2 OH O NH2 HS S OH NH2 O H2N S NH2 Glutathione (GSH) Thiourea L-Methionine (L-Met)L-Cysteine (L-Cys) Fig. 2. Structures of studied sulfur-donor ligands. A. Mijatović ...
    ... 2+ at 295 K, pH 7.4. Ligand Group d (ppm) Free Coordinated L-Met CH3(s) 2.16 2.78 CH(dd) 3.89 4.42 L-Cys CH(dd) 4.00 4.14 CH2(m) 3.08 3.31 GSH Cys-Hb(m) 2.98 – Cys-Ha(dd) 4.59 – GSSG Cys-Ha(dd) 4.77 4.45 Thioureaa C@S 183.6 177.9 a Data from 13C NMR. Table 3 The second-order rate constants ...

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials
    ... 1 in modulus we determine the exact value of lim;—o5 C(S)). Table 1. Among all monic reciprocal polynomials P2, € Z(x), composed of / monomials, S;(x) has the smallest limyj—oo C(P2n). l Polynomial S;(x) limy—oo C(S7) | Exact value of limp. C(S)) 5 eM g Mtl yy yy Ml yy] 1/3 1/3 3/ v5, 23 41 6 x24 xt ...
    ... theorem for the continuous function f1 the slope S of the line M1M2 is greater than B1 in modulus. Using the mean value theorem again for the continuous function f2 it follows that there is a point t such that f ′ 2(t ) = S so that | f ′ 2(t )| = |S| > B1 which is the contradiction with (i). It remains ...
    ... To prove Theorem 6 we use two lemmas which Everest and Ward proved in [6]. Denote as usual the (multiplicative) circle group by K =S 1, and the torus by K 2 =S 1×S 1. For an integrable function f : K →C, write ∫1 0 f (e2πiθ)dθ = ∫ f (x)dµK = ∫ f dµK (5) and for an integrable function g : K 2 ...

  • Дефинисање параметра песковитог тла за потребе прорачуна слегања плиткох темеља преко CPTm и CPTu опита

    Александар Јаковљевић (2024)
    Дефинисање меродавних геотехничких параметара тла за потребе прорачуна слегања.(a и носивости)темељног тла један је од главних задатака инжењера геотехнике.Од поузданости ових параметара и последично резултата прорачуна слегања и носивости, директно зависи који ће се тип, врста и димензије темеља као и начин фундирања истог примењивати.Да би се поуздано дефинисали неопходни геотехнички параметри а потом и извели потребни прорачуни слегања, потребно је на првом месту познавање деформабилних карактеристика тла.Подаци о збијености тла могу се добити или лабораторијским испитивањима на претходно ...
    CPT, песак, слегање, параметри, корелације
    ... nujarpaM KanacH(bukatuje THa naT je Ha cH 2,22b. 18 ! bor = IOOkPo • I.02 kgf/cmž SANDS / // SAND/S/ / /ANDŠIAS:;·[D:'S / / /CLAVEV / 7 / ILTY CLAYS /s _ CLAYS C O N E R E S I S T A N C E , bo rs C O N E B E A R I N G , .. bo rs FRICTION RATIO,FR, % o | | 3 4 5 6 ...
    ... 50 0 0 T T Durgunoglu-Mitchel, 1975 —— Schmertmann, 1977 c SOH\AA IM --- Bellott i dr. 1989 c 5 S i (Pesak Ticino) & 469 F - e 100 e 100 > Š 449 ž ž }7 o ? is0 ·< 150 c i s i 420 = : S 200 Š 200 0 250\ 250 387 ' \ o P P, 36 (kPa) (kPa) 300 300 Cnuka 2,23. Penamuana 360ujenocm ...
    ... mrro je y npopauuM yBeo yTHmaje JJyOHHe ()yH)upabba H Teuehba necKa. Tako a je/HauuHa 3a rpopauyH cJterabba rJacH: 38 r s=C,·C;·q„·kZ(Ž)k·H· (3.2, 3) Ine je: s — cyleraPbe TEMCJba Ha HIIČCKy qn — OI yHcKo omrepeheMbbc Hk — /leOxbHHa ciIoja K Izk — yrHmajHH (bakTop BepTHKajHHx ne(opwmanuja ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... 00 c O 0 0 0 0OS9% - x s _ LIA LL [4.] lO r A 60 x 009% P > s LLLI 801 tl il 00 lO 0 0 0 6 089% t s r 4 |4| 6cl LI 00 [4%]] #0 0 0 6 089% [ . ı 06 OI tl 00 c O I 0 0 6 0/9% 1-S [A] INI b{4| tl LO b O r ...
    ... IOAA | UjBUOJS oAISSoIdutOO) | UjGUOJS OAISSoIduIOO) | i}SUOJ)S OAISSoJdumIO ) O2UPJSISOI JSOJ,I IOJPAA | AJISOIJOd A s u o p [e0» K s u o p ying 'ON ouojsoutı („LS) ytueSnng puve *(3{S) 1nznys *(LL) eoTusı |, *(TX{) eunsijyz~ Jo soniodoad [eotuuoo [ ...
    ... izdanja 18: 27—–28 (in Serbian) Siegesmund S, Snethlage R (2011) Preface. In: Siegesmund S, Snethlage R (ed) Stone in architecture: properties, durability, 4th edn. Springer, Berlin, pp v-vii Siegesmund S, Torok A (2011) Building Stones. In: Siegesmund S, Snethlage R (eds) Stone in architecture: ...

  • The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments

    Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)
    The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...
    sediments, Tisza River, organic matter, biomarkers, oil pollutants

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
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    ... Š w s u s eFegoSs R:B -KA -NN= 5338 !s a o s > FCESCOSOSSŽŽŠSNULU 2 Š 5s s-3 ž .9 š Š s s SasadgsgzsP-SSZa3šazE Š 8 • Ss= L:1 eTw%e e > ž Ss20005aSSSo22S9S.CSE B o e 0805 >98X5 Bo = > š eSSšžogSaSDooSZPZ .OOZ Čč Š ss5 8 sEZŽaB ŠE z Š Š ZdoXSSTTI od2-S2989 2 E s g80 Ž čSZ'OBOme„9ž%ž M“ S Š zž ...
    ... zžoSBgoZ2S9S599SSSPB S s LBI . BE I E -_ > s sS8sSSašSo9ZSScCOSŽ>SO B e 8 d.„299gM 5 0 0 |TO ž s Z 539957%8%8S p Brajy:B l O 1 e Š2č2EZžBSXSZ.O O O dd P s T I POočSSoesSčaesSŽŠG 2 +ž Š -E N [-] i [ O > [LNr"'P::4"| #*4 Š SoCcZC r Š ž e„dOOgEeS3eVe0OS>ZSGS - S Š sožO2SSSS9PPoŠPZ2SzZ MB ~ R sBoO9 ...

  • Definisanje strukturnih odnosa primenom postupka horizontalni gradijent

    Snežana Ignjatović, Ivana Vasiljević, Natalija Jovanović (2019)
    Različiti postupci matematičkih transformacija se mogu primeniti na gravimetrijskim i magne tometrijskim podacima, kako bi se na istražnom terenu definisali strukturno-tektonski odnosi. U radu su prikazani rezultati dobijeni korišćenjem postupka horizontalni gradijent i ukupni horizontalni gradijent na gravimetrisjkim podacima. Navedeni postupci su pomogli da se detektuju kontakti sa velikim padnim uglom (vertikalni ili subvertikalni kontakti), koji se mogu interpretirati kao rasedi. Za test područije uzet je istražni prostor koji se nalazi na jugoistoku Srbije u okolini Vranjskog basena. Položaji ...
    gravimetrijski podaci, matematičke transformacije, rased, Vranjski basen

  • Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

    Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)
    Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer

  • Mikroplastika u peloidima iz Srbije i Slovenije

    A. Šajnović, G. Gajica, F. Prosenc, S. Stojadinović, G. Veselinović, P. Trebše, P. Dabić, B. Jovančićević (2023)
    ... Serbia and Slovenia | A. Šajnović, G. Gajica, F. Prosenc, S. Stojadinović, G. Veselinović, P. Trebše, P. Dabić, B. Jovančićević | 9. simpozijum Hemija i zaštita životne sredine EnviroChem2023, Kladovo, 4-7. jun 2023. | 2023 | | http://dr.rgf.bg.ac.rs/s/repo/item/0008147 Дигитални репозиторијум Рударско-геолошког ...
    ... 2023-10-16 10:50:50 Mikroplastika u peloidima iz Srbije i Slovenije;Microplastics in peloids from Serbia and Slovenia A. Šajnović, G. Gajica, F. Prosenc, S. Stojadinović, G. Veselinović, P. Trebše, P. Dabić, B. Jovančićević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду ...
    ... prezentacije Mikroplastika u peloidima iz Srbije i Slovenije Microplastics in peloids from Serbia and Slovenia 4. Šajnović!, G. Gajica!*, F. Prosenc**, S. Stojadinović!, G. Peselinović!, P. Trebše?, P. Dabić“, B. Jovančićevićš (1) Univerzitet u Beogradu, Institut za hemiju, tehnologiju i metalurgiju ...

  • Geotouristic Approach to the Elements of Geocultural Heritage by Using UGAM Model: UNESCO World Heritage Site Felix Romuliana (Zaječar, Serbia)

    Miloš Marjanović, Rastko Marković, Kristina Šarić, Aleksandar R. Radivojević, Aleksandar Antić, Đoko Raičević, Randall J. Schaetzl, Slobodan B. Marković (2024)
    This article presents a new Urban Geoheritage Assessment Model (UGAM) for the tourism potential of urban geoheritage. The model was applied to the well-known archaeological site Felix Romuliana (Serbia), so as to determine if the site has the potential to become an urban geosite. To support the UGAM model, a mineralogical-petrographical examination of the building stone available to visitors (both on the site and in the Zaječar National Museum) was carried out, and geological outcrops near the site were ...
    урбано геонаслеђе, УГАМ, процена геонаслеђа, грађевински камен, Србија
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  • Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++

    Branislava Šandrih, Ranka Stanković (2020)
    U nauci, industriji i mnogim istraživačkim oblastima, terminologija se brzo razvija. Najčešće, jezik koji je „lingua franca“ za većinu ovih oblasti je engleski. Kao posledica toga, za mnoga polja termini domena su koncipirani na engleskom, a kasnije se prevode na druge jezike. U ovom radu predstavljamo pristup za automatsko izdvajanje dvojezične terminologije za englesko-srpski jezički par koji se oslanja na usaglašeni dvojezični korpus domena, ekstraktor terminologije za ciljni jezik i alat za usklađivanje delova. Ispitujemo performanse metode na domenu ...
    ekstrakcija terminologije, validacija terminologije, GIZA++, grafovi, Unitex, klasifikacija teksta

  • History of the development of the hydrodynamic model of the open pit mine “Drmno”, Serbia

    Dušan Polomčić, Jelena Ratković, Vesna Ristić Vakanjac (2023)
    With the creation of a hydrodynamic model, the need for it usually ceases until some next moment when the model needs to be updated and used for the set task for the necessary project documentation or dedicated studies. It is relatively rare that almost every year the model is improved and used for forecast calculations. The paper presents the basic characteristics and development of the hydrodynamic model of the open pit mine “Drmno” for 25 years. This open pit ...
    hidrodinamički model, površinski kop, rekalibracioni model, drenažni sistem

  • Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise

    Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)
    Multidisciplinary

  • Konceptualni model hidrogeotermalnog sistema šire okoline Brusa - geološki, geofizički i hidrogeološki uslovi / Conceptual model of hydrothermal system of Brus area - geological, geophysical and hydrogeological condition

    Dejan Milenić, Ana Vranješ, Marinko Toljić, Ivana Vasiljević, Natalija Radosavljević, Matija Ognjanović (2024)
    Na širem području Brusa izvedena su naučna multidisciplinarna istraživanja za potrebe ocene geotermalnog potencijala sa zadatkom de9inisanja uslova formiranja geotermalnih i termomineralnih resursa. Interpretacijom podataka zaključeno je da je na predmetnom terenu formiran "hibridni" hidrogeotermalni sistem, koji sadrži elemente sistema u rov-strukturi i elemente konvektivnog hidrogeotermalnog sistema sa rezervoarom u pokrivaču granitoidne intruzije. Sistem čine dva nezavisna hidrogeotermalna rezervoara. Prvi rezervoar formiran je u gornjokrednim krečnjacima na dubini od oko 1550 m. Maksimalne prognozne temperature hidrogeotermalnih resursa u krečnjačkom ...
    hidrogeotermalni sistem, gornjokredni krečnjaci, trijaski mermeri, Brus

  • 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 ...
    rudarska mehanizacija, znanje eksperta, lingvističke varijable, FAHP

  • 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)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Paleovegetation and environment during deposition of the Late Oligocene sub-bituminous coal in the Bobov Dol Basin (SW Bulgaria) as deduced from petrographic and geochemical characteristics

    Alexander Zdravkov, Achim Bechtel, Doris Groβ, Ivan Kojić, Ksenija Stojanović, Dragana Životić (2024)
    Coal and carbonaceous shale samples were taken from the Late Oligocene Bobov Dol Basin, SW Bulgaria. Seams Ia, I, IIa+b, III, IV and V from the coal-bearing Bobov Dol Fm. were sampled to provide insights into the peat forming vegetation and depositional environment based on detailed organic petrological and geochemical study. The petrographic composition indicates that both coals and carbonaceous shales contain predominantly terrestrial organic matter with abundant huminite macerals and locally enriched liptinite macerals. Inertinite is rare or ...
    ЈЗ Бугарска, басен Бобов Дол, мрки угаљ, органска петрологија, биомаркери
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    ... hopanes; R and S designate +v Hi 5 --| a “ o B = ıs A|SampleP, < – = | P | m/z= 191 e % Q |. ~ [ -ı H ra:u H} 8 |- R- š . = S - -} – _ . s8 zj FROME: oO # = el s| = p š čI Š - ~ |j P = s|| „> + | a i i TTTTT 48 50 52 54 56 58 Cxo neohop-13(18)-ene — [3 | i ii F| <| s 8 ii 9| ...

  • Metalogenija jurskih karstnih boksita rudnih rejona Vojnik-Maganik i Prekornica, Crna Gora

    Slobodan Radusinović S. (2017)

  • Hidrogeološke karakteristike Mačve i Pocerine s aspekta melioracija u poljoprivredi odvodnjavanja i navodnjavanja

    Milojko Lazić (1985)
    Hidrogeologija, melioracija, Mačva, Pocerina