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Упит dcterms_subject_txt:Boyd-Lawton limit formula

323 items

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations

  • 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
    ... šljunka teži pravoj liniji što znači da populacija zrna ima normalnu rapodelu (Slika 11). Koeficijent neravnomernosti izračunat je korišćenjem formule Cu=deo/dio i za ovaj materijal iznosi C„=40,1. Koeficijent zakrivljenosti predstavlja meru asimetrije krive frekvencije. Mera asimetričnosti Je ...
    ... različitom odnosu. Koeficijent zakrivljenosti je indikator kinetičke energije transportnog: medijuma. Ovaj koeficijent izračunat je korišćenjem formule C.= d30? d60*d10 gde dio, dao i deo predstavljaju veličinu frakcijana prolazu od 10, 30 i 60%. Masa materijala ispod sita 0,003mm nije bila ...

  • Preparation of Multimedia Document “YU Rock Scene”

    Milena Obradović, Aleksandra Arsenijević, Mihailo Škorić (2017)
    SUMMARY: This study will present the preparation process of a multimedia document entitled YU ROCK SCENE in which participants were senior students of undergraduate studies of the Department of Library and Information Science at the University of Belgrade Faculty of Philology during the academic year 2014/2015, as a part of the subject Multimedia Documents. This study gives an overview of the historical development of rock and roll in the territory of the former Yugoslavia, rock scene in Yugoslav republics, ...
    multimedia document, library science, information science, rock and roll, music, Yugoslavia

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Design and drilling of wells in formations with high pressure

    Vojin Solomun (2024)
    Objectives of this Thesis are to: - Develop an awareness of the challenges presented from elevated temperatures and pressures in well construction. - Learn the key differences between ―normal‖ condition wells and HPHT wells. - Understand some of the indicators of thermal- and pressure-related problems. - Understand the responses which may be made to mitigate high pressure and high temperature ,,HPHT‘‘ challenges while drilling wells. HPHT wells are an unavoidable consequence of the ever expanding search for oil and gas resources around the world. As wells are ...
    HPHT, well, challenges, design, oil and gas
    ... wellbore. Fracture charging can be avoided by maintaining the wellbore pressure below the critical pressure (tensile failure limit) although it is difficult to predict this limit, even with the best Mechanical Earth Model and Mud Density Window prediction; hence it is important to recognize the potential ...
    ... understood. Elastomer temperature limits need to be understood and defined. Table 3.1 - Elastomer temperature limits (Marshall, 2016.): Material Temp Limit "C ("F) Nitrile Butadiene Rubber (NBR) 79.5 – 99 (175 — 210) Hydrogenated Nitrile Butadiene Rubber (HNBR) 121 — 160 (250 – 320) Viton 150 – 204 ...
    ... valves - Sequenced (manual or automatic) closing of the fail safe valves on a subsea stack with the outer valves closing first should be used to limit the effects of cutting out the gates. Consideration should be given to the closure mechanism and whether additional hydraulic assist should be ...

  • Sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja

    Anđela Jovanović (2024)
    Predmet i cilj pisanja ovog rada su sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja. Prilikom ovih istraživanja, ispitivan je sistem REE2O3–V2O5–KF, gde REE predstavlja trovalentni katjon izabranih elemenata retkih zemalja (Y, Sm, Eu, Gd, Er, Yb). Ovo istraživanje bazirano je na sintezi kristala, nakon čega su dobijeni kristali posmatrani pod binokularnom lupom, analizirani metodom rendgenske difrakcije na polikristalnom materijalu (XRPD) i metodom skenirajuće elektronske mikroskopije sa energetsko-disperzivnom spektroskopijom (SEM-EDS), kako bi se utvrdile karakteristike dobijenih kristala. ...
    elementi retkih zemalja, sinteza kristala metodom fluksa, vanadati alkalnih metala, rendgenska difrakcija, SEM-EDS metoda

  • Analysis of the intensity of erosive processes and state of vegetation cover in the zone of influence of the Kolubara Mining Basin

    Milica Živanović, Miško M. Milanović, Branislav Trivić, Snežana Đurđić, Miroljub Milinčić, Milisav Tomić, Goran Grozdanić (2024)
    Ensuring the quality protection of geospatial elements entails environmental control, a task unattainable without precise measurement results. This article aims to conduct a spatio-temporal analysis of soil degradation and vegetation status within the influence zone of the Kolubara Mining Basin in Serbia. Remote sensing is employed to assess vulnerability to erosion using the erosion potential method. A geographic information system environment is utilized to generate an erosion map, illustrating erosive processes across different time periods, particularly comparing the present situation (2022) to 1983. Results indicate that observed areas are experiencing ...
    коришћење земљишта, даљинска детекција, НДВИ, Колубара МБ, Србија

  • On the distribution modulo 1 of the sum of powers of a Salem number

    Dragan Stankov (2016)
    It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.
    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 √ 1− (x−2a1)2 4a21 + 1 √ 1− (x−2a1+1)2 4a21 + · · · + 1 √ 1− (x+2a1−1)2 4a21 ⎞ ⎟ ⎟ ⎠ . If we take a1 = 1 we get the Dupain’s formula, which is presented above. Hereafter we suppose that P (x) = a2x 2 + a1x and then, using the notation of the Theorem 2.1, we have two branches of ...
    ... with different Salem numbers θ of degree six, for fixed P , we can conclude that the histogram does not depend on their size. We can explain why the formula (1) depends only on the degree 2t of θ : (1) numbers 1, ω1, . . . , ωt−1 576 D. Stankov / C. R. Acad. Sci. Paris, Ser. I 354 (2016) 569–576 are ...

  • Pseudo-linear combination of fuzzy metrics

    Nebojsa M. Ralević, Bratislav D. Iričanin, Dejan Ćebić (2024)
    fazi metrike, filtriranje slika
    ... using a sliding: window that traverses the entire image from top to bottom, pixel by pixel. The UIQI is calculated for each window using; the formula provided in |[17]. The individual window values are then summed and averaged over the total number of windows. Image quality could also be examined ...
    ... to which the edge belongs) and w(e,;) is the width of the edge e;. The cumulative probability of blur detection (COPBD) is determined using; the formula. Paun = P(e;) = 1 – exp PiNB CPBD = P(PpLun < PNB) = z P(PaLunR). PaBLUR=0 PSEUDO-LINEAR COMBHINATION OF FUZZY METRICS 45 P(PpBLunR) denotes ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... and N-S). The age of D, strike-slip movements has a possible upper limit, since Miocene formations seem to seal Dx strike-slip faults (Fig.2a), however satisfying evidences are lacking. Direct evidence for the lower limit is lacking due to the absence of Paleogene rocks in the study area ...
    ... area. However we speculate using an indirect argument for the lower limit on the basis of regional forcing factors. It has been shown that indentation tectonics and related shortening in the Alps resulted in lateral wrenching in the Dinarides and the development of NW-SE striking dextral systems ...

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics
    ... with intermittent dynamics in form of collective response activities, called avalanches. Generated avalanches are theoretically studied mainly in the limit of adiabatic driving in which the external loading is kept constant during avalanche prop- agation. However, a much more realistic scenario would be ...
    ... (adiabatic, quasi-static, and finite driving rate) overlap with practically no apparent differences, indicating that all differences disappear in the limit Ω = dH dt → 0. For the case of intermediate rates, as shown in top inset of figure 1(a), the distributions are markedly different than in the adiabatic ...
    ... c (R,L) and effective critical field Heff c (R,L) which tend to critical magnetization M c and crit- ical magnetic field Hc in the thermodynamic limit, see [49]. Heff c (R,L) is the value of magnetic field at which the (averaged) susceptibility curve, corresponding to the given (R,L) pair, attains ...

  • The Reciprocal Algebraic Integers Having Small House

    Dragan Stankov (2021)
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials
    ... In 1985, D. Boyd [4] conjectured, using a result of C.J. Smyth [14], that c should be equal to 3/2 log θ where θ = 1.324717 . . . is the smallest Pisot number, the real root of the polynomial x3 − x − 1. Intending to verify his conjecture that extremal α are always nonreciprocal, Boyd has computed the ...
    ... reciprocal. In 1985, D. Boyd [4] conjectured, using a result of C.J. Smyth [14], that c should be equal to 3/2 log @ where 6 = 1.324717... is the smallest Pisot number, the real root of the polynomial x3 — x — 1. Intending to verify his conjecture that extremal a are always nonreciprocal, Boyd has computed the ...
    ... P., Hare, K. G. (2002). Some computations on the spectra of Pisot and Salem numbers. Math. Comp. 71:767–780. DOI: 10.1090/S0025-5718-01-01336-9 [4] Boyd, D. W. (1985). The maximal modulus of an algebraic integer.Math. Comput. 45(171):243–249. DOI: 10.1090/S0025-5718-1985-0790657-8 [5] Dimitrov, V. (2019) ...

  • Specifičnosti izgradnje deonice 3 brze saobraćajnice Požarevac-Golubac na organskom tlu

    Vojislav Lučić (2024)
    U ovom završnom radu prikazani su podaci koji se odnose na metode ojačanja terena izgrađenog od slabonosivog organskog tla, kao i njegove geotehničke karakteristike na primeru šireg istražnog prostora, u okolini sela Kumane duž trase treće dionice brze saobraćajnice Požarevac-Golubac. U radu su prvo prikazane osnovne karakteristike i podele organskog tla i treseta, zatim su navedene metode ojačanja tla koje mogu da se koriste na datom istražnom prostoru i na kraju je izvršena analiza i interpretacija rezultata geotehničkih istraživanja ...
    organsko tlo, treset, metode ojačanja slabonosivog tla, slieganje, konsolidacija i vremenski tok konsolidacije
    ... se određuje po formuli s, = 2,m, n *A Ozn * H, gdje je my n modul zapreminske stišljivosti n-tog sloja (recipročna vrijednost modula stišljivosti My). Sekundarno slijeganje se računa preko standardne metode po kojoj slijeganje raste ; < ; t :; linearno. Ono se računa po formuli s = H * ca * log ...
    ... koristi za dobijanje konsolidacionog slijeganja, koristi se Osterbergova metoda. Prema ovoj metodi napon od dopunskog opterećenja se računa po formuli: Ao, = qn* , (18) gdje je qn neto opterećenje od nasipa i I> uticajni faktor koji zavisi od dužina Bi i B-,dubine z na kojoj se određuje prirast ...
    ... je poznavati brzinu dreniranja terena, tj. brzinu konsolidacije. Na osnovu teorije Jednodimenzionalne konsolidacije ova veličina se računa po formuli: u 62%u t – Gž 6z2 (20) gdje Je: u porni pritisak, t vrijeme, cv koeficijent konsolidacije (c, = %), k koeficijent , vodopropustljivosti, my ...

  • Split-Desktop software for the analysis of fragment size distribution of blasted rock mass

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...
    Split-Desktop softver, drobljenje stena, miniranje, analiza, digitalna obrada fotografija

  • Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog

    Maja D. Milošević (2016-12-09)
    Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...
    minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • Analiza delovanja vazdušnih udara nastalih kao posledica miniranja na krečnjaku

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović (2024)