Претрага

Упит dcterms_subject_txt:the Kamenička River

314 items

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт

  • High-resolution sequence stratigraphy of carbonates - theory and examples

    Jelena Stefanović, Dejan Radivojević (2020)
    Циљ рада је да кроз теоријски аспект и примере примене представи секвенциону стратиграфију високе резолуције карбонатних седимената. У том смислу први део се односи на појам и значење високе резолуције у секвенционој стратиграфији. Од временских и просторних скала које одговарају сеизмичким профилима у последњих двадесет година метода је нашла примену на скалама које одговарају бушотинским подацима или изданцима. Као најпогоднији седименти за овај тип истраживања су се показали карбонати јер су осетљиви на еустатичке промене, а основе секвенционе стратиграфије ...
    изданак, системска група, јура-креда, карбонатна платформа, плитководна средина

  • Analiza seizmičkog dejstva eksplozije pri miniranju na primeru izrade tunela Golubac kod Golupca

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2022)
    Savremeno rudarstvo, a pogotovo masovna eksploatacija metaličnih ležišta, ne bi se mogla zamisliti bez primene eksploziva. Rudarstvo je privredna grana, gde su eksplozivi našli najširu primenu za eksploataciju čvrstih mineralnih sirovina. Primena energije eksploziva dovodi do poboljšanja tehničkoekonomskih pokazatelja pri eksploataciji mineralnih sirovina, ali i do pojave negativnih efekata koji prate radove na miniranju. Eksplozivni materijali u rudarstvu, geologiji i drugim delatnostima, svojim dejstvom narušavaju prirodnu sredinu u vidu drobljenja, razbacivanja komada stene, vazdušnih udara, pojave sezmičkih efekata, pojave ...
    miniranje, seizmičko dejstvo, brzina oscilovanja stenske mase, kriterijumi ocene seizmičkog dejstva

  • The number of nonunimodular roots of a reciprocal polynomial

    Dragan Stankov (2023)
    We introduce a sequence Pd of monic reciprocal polynomials with integer coefficients having the central coefficients fixed as well as the peripheral coefficients. We prove that the ratio of the number of nonunimodular roots of Pd to its degree d has a limit L when d tends to infinity. We show that if the coefficients of a polynomial can be arbitrarily large in modulus then L can be arbitrarily close to 0. It seems reasonable to believe that if ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • 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
    ... present the �rst half coe�cients of Pd(x) in the sixth column. 5. We calculate the number ν(d) of roots of Pd(x) outside the unit disc as ν(d)) = k0νr(d0) and write it in the ��h column. 4. Old and new conjectures The �rst, fourth and sixth column of our Table 2 represent the continuation of the Table ...
    ... inside that disk (the origin with multiplicity d), Rouché’s theorem reduces our claim to the inequality |P(z) − zd| < |zd| on the circle |z| = L4/d. The right-hand side equals L4 on the circle, whereas the le�-hand side is |U(z)| ≤ L · max(1, |z|)degU < L · L 4 d · 3d4 = L4 on the circle. EXPERIMENTAL ...
    ... follows straightforwardly from the inequality (2.6) in the proof of the following Theorem 2. The fact that (mrpd(d))d≥1 is bounded above by the forth power of the golden ratio has been discovered by Hironaka [8]. Here, we present a di�erent proof of this fact. Theorem 2. The house of P2n(x) = x2n − xn+1 ...

  • 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
    ... points with Γ2, the graph of f2. If −1 < f2(t ) < −1+ ε j after showing the convexity of f1(t )− f2(t ) on D1 the claim follows in the similar manner. Analogously we prove the claim if the domain of a branch is the subset of D2 as well as the claim for the end point of I j : if t j is in the domain of a ...
    ... than the value at each local maximum and −1+ε j is less than the value at each local minimum of f2(t ) on (t j−1, t j ). (iv) If the domain of a branch of cosnt is the subset of the interior of I j then cosnt − f2(t ) has values of the opposite sign at the end points of the domain so that the branch ...
    ... using the mean value 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 ...

  • A necessary and sufficient condition for an algebraic integer to be a Salem number

    Dragan Stankov (2019)
    We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials
    ... to find at least one n such that the minimal polynomial Pn(x) of τn satisfies condition (1.2). In Table 1.1 we present examples of Salem numbers and the smallest n which we have found. The forth example in the table is the root of the Lehmer polynomial which is the smallest known Salem number. We notice ...
    ... arbitrary power of the root. We determined the exact value of the probability for d = 4, 6 and we approximated the probability for d = 8, 10. Theorem 1.2. Let τ be a Salem number of degree d, n, n0 ∈ N and let Pn(x) be the minimal polynomial of τn. Let pd denotes the limit of the probability that ...
    ... would like to thank the unknown referee for valuable comments that resulted in an improvement of this paper, espe- cially for the calculation of the smallest n of the last seven Salem numbers in the Table 1.1, marked with *, which the referee generously permitted to be added in the Table. 218 Dragan ...

  • 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
    ... namely θ−1 , inside the unit disc, while the others are on the boundary. The degree, say 2t , of θ is even and is at least 4. Throughout, we will use the following notation where x and x′ designate real numbers: (i) the integer part function: [x] = max{n ∈ Z : n ≤ x}, (ii) the fractional part function: ...
    ... [4] determined the density function for (θn)n≥1 , modulo 1: f ′(x) = 1+ 2 ∞ ∑ k=1 J0(4kπ)t−1 cos2πkx (1) on (0, 1). Here J0(·) is the Bessel function of the first kind of index 0. 2. The main theorem The aim of this paper is to obtain explicit forms of the repartition and of the density functions ...
    ... count the number of n so that the fractional part of P (θn) falls into each of subintervals. The vertical axis indicates the number of such n divided by N/p, so that this normalization results in a relative histogram that coincides with f ′(x), the function determined using the main theorem. The histograms ...

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method

  • Serbian NER&Beyond: The Archaic and the Modern Intertwinned

    Branislava Šandrih Todorović, Cvetana Krstev, Ranka Stanković, Milica Ikonić Nešić (2021)
    U ovom radu predstavljamo srpski književni korpus koji se razvija pod okriljem COST Akcije „Distant Reading for European Literary History” CA16204. Koristeći ovaj korpus romana napisanih pre više od jednog veka, razvili smo i učinili javno dostupnim Sistem za prepoznavanje imenovanih entiteta (NER) obučen da prepozna 7 različitih tipova imenovanih entiteta, sa konvolucionom neuronskom mrežom (CNN), koja ima F1 rezultat od ≈91% na test skupu podataka. Ovaj model je dalje ocenjen na posebnom skupu podataka za evaluaciju. Završavamo poređenje ...

  • Arsenic in Tap Water of Serbia´s South Pannonian Basin and Arsenic Risk Assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)
    kvalitet podzemnih voda, arsen, analiza rizika, Panonski Basen

  • Kvantitativna ocena režima i bilansa podzemnih voda u aluvijonu Velike Morave od Bagrdana do ušća u Dunavu

    Aleksandar Balubdžić (2024)
    Aluvijalni sedimenti velikih reka raspolažu značajnim količinama podzemnih voda, što je zajedno sa površinskim vodama dozvolilo razvoj naselja i ljudskih aktivnosti. Ovaj razvoj uslovljava veće potrebe za vodnim resursima i njihovim kvalitetom. Sa povećanjem eksploatacije podzemnih voda, uticaj iste je značajniji i može da dovede do opadanja nivoa podzemnih voda i pogoršanja kvaliteta. Aluvijon Velike Morave ima značajno rasprostranjenje, usled čega predstavlja važno ležište izdanskih voda sa velikim eksploatacionim mogućnostima. Izradom hidrodinamičkog modela aluvijona Velike Morave od Bagrdana do ...
    režim podzemnih voda, bilans podzemnih voda, intergranularna izdan, hidrodinamički model
    ... Polomčić, D., Čokorilo Ilić, M., Bajić, D., Kresojević, M. (2019). Surface water flows as impacted by sand and gravel minig: Case study of the Velika Morava river, Serbia. In: 7 International Symposium "Mining and Environmental Protection (str. 203-210). Beograd: Rudarsko-geološki fakultet, Univerzitet ...
    ... Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET ...
    ... uslov zadatog proticaja, -granični uslov efektivna infiltracija -opšti uslov generalnog nivoa na granici 6.3.1. Granični uslov „reka“ (eng. „river“) Za definisanje režima podzemnih voda na području aluvijona Velike Morave od Bagrdana do ušća u Dunavu, najvažniju ulogu imaju površisnki tokovi ...

  • Hidrodinamička analiza procesa starenja bunara sa horzontalnim drenovima na beogradskom izvorištu podzemnih voda

    Đorđije M. Božović (2023)
    Predmet istraživanja doktorske disertacije su bunari sa horizontalnim drenovima beogradskog izvorišta podzemnih voda, drugog najvećeg izvorišta ovog tipa na svetu, čiji je režim rada opterećen procesima intenzivnog starenja prisutnog od samog početka formiranja izvorišta, početkom 1950‒ih godina. Istraživanja sprovedena u okviru izrade disertacije su imala za cilj definisanje nove metodologije izučavanja procesa mehaničkog i biohemijskog kolmiranja drenova izradom detaljnih 3D numeričkih hidrodinamičkih modela, upotrebom postojećih, dostupnih i široko rasprostranjenih računarskih programa. Istraživanja su realizovana simulacijom ostvarenog režima podzemnih voda ...
    modeliranje podzemnih voda, hidrauličke karakteristike drenova, koeficijent propusnosti drenova, prifilterska zona drena, hidraulički otpori na drenovima, kolmiranje drenova, ulazne brzine podzemnih voda, MODFLOW, CLN Package
    ... Interference of radial collector well adjacent to river bank. Symposium of International assoc. of scientific hydrology, Athens. 131 Milojević M., 1963a. Radial collector wells adjacent to the riverbank. Journal of the Hydraulics Division, Proceedings of the American Society of Civil Engineers, 89(6) ...
    ... –02. 10. 2022., Zlatibor. 173 Przybyłek, J., Dragon, K., Kaczmarek, P.M.J., 2017. Hydrogeological investigations of river bed clogging at a river bank filtration site along the River Warta, Poland. Geologos 23, 3, 201–214. DOI: 10.1515/logos-2017-0021 174 Pušić M., Dimkić M., Vidović D., Dotlić ...
    ... 1935. The Thiem method for determining permeability of water‒bearing materials. U.S. Department of the Interior, Geological Survey, Water Supply Paper. DOI: 10.3133/wsp679A 215 Wett, B., Jarosch, H., Ingerle, K., 2002. Flood induced infiltration affecting a bank filtrate well at the River Enns, ...

  • The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis

    Ljiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua (2021)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)

  • Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu

    Nikoleta Aleksić (2021)
    ... fish species from the Sava River and risk assessment for consumers. Science of the Total Environment, 650, 958-969. [3] Kostić, J., Kolarević, S., Kračun-Kolarević, M., Aborgiba, M., Gačić, Z., Paunović, M., ... & Vuković-Gačić, B. (2017). The impact of multiple stressors on the biomarkers response ...
    ... heavy metals in fishes in the middle and lower reaches of the Yangtze River basin. Environmental Pollution, 159(10), 2575-2585. [28] Zheng, N., Wang, Q., Zhang, X., Zheng, D., Zhang, Z., & Zhang, S. (2007). Population health risk due to dietary intake of heavy metals in the industrial area of Huludao ...
    ... assessment and apportionment of pollution sources of Tigris River (Turkey) using, multivariate statistical techniques – a case study, River Res. Applic. 28(9):1428–1438 [12] Kibria, G. (2004). Environmental update-Dissolved oxygen: The facts. Outlet. Issue 162. pages 2-4. [13] Zhu, Z., Guan, X. ...

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • Arsenic in tape waters of the south Pannonian basin (Serbia) and arsenic risk assessment

    Petar Papić, Marina Ćuk, Maja Todorović, Jana Stojković, Bojan Hajdin, Nebojša Atanacković, Dušan Polomčić (2012)