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Упит dcterms_creator_txt:Gómez Borrego A.

1483 items

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... several grades (given as linguistic variables) [4]. TABLE I. QUESTIONNAIRE FOR ASSESSMENT OF AVAILABILITY INDICATORS A n a ly st N o . A v a il a b il it y in d ic a to r Questionnaire: Bulldozer Liebherr – Drmno Open Pit Mine Grade: Excellent Good Average Adequate Poor ...
    ... into one overall (A). Identification of obtained results, for their easier interpretation, is presented at the end, as well as their comparative analysis. A. Proposition The first step in the making of expert model for A assessment is describing linguistic variables related to A itself and to ...
    ... function (1) of A of machine Liebherr-D in form: μA(Lib-D) = (0, 0.11, 0.475, 0.475, 0.14) E. Final Exam and Identification Best-fit method [1] and proposed A fuzzy set give the final availability assessment for the machine Liebherr-D: ⸹1(A(Lib-D), exc) = [S5 j=1 (µj A(Lib-D) - µj exc)]0 ...

  • Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process

    Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)
    Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...
    DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker
    ... Figure 5. These modes are unambiguously assigned to o-V>Os structure [30,31]: ~104(A„), 146(Bye / Bae), 198 (A„/Bx»), 285 (Biy / Bae), 306 (A), 406 (Ay), 483 (A„), 528 (A„), 701 (Biy/ B»g), and 995 cm_! (Ae). A good agreement of the position of the Raman mode at 995 cm ! with corresponding bulk ...
    ... sample, Figure 2. Refined unit cell parameter values (a = 11.506 (2), b = 4.3708 (6), c = 3.5627 (4) A,V = 179.17 (4) A9) are in good agreement with reference values reported in upper mentioned PDF card (a = 11.5100, b = 4.3690, c = 3.5630 A, V = 179.173 A3). The significant presence of an amorphous ...
    ... with the absence of ~840 cm ! mode in the spectra of the catalyst, reveals a good crystallinity of the V>»Os phase [30—32]. A broad feature at ~1020 cm !1 may be ascribed to surface VOx species on V>Os [33]. R a m a n in te ns it y 100 200 300 400 500 600 700 800 900 1000 1100 1200 Raman ...

  • Хазард од клизишта у Србији у 21. веку

    Biljana Abolmasov (2019)
    клизишта, хазард од клизишта, промене климе
    ... seeedes Zenic: 110.0 as S$ 8 8&8 S§ 8 8 $8 $$ FS 8B BS HF SF FF 8 3 8 $8 § &§ &$ 8 &€ 8 8 8 8 8 8 8 B = = = = = = = = = = = = = = = = a a a a a a a a a a a a a a a a >» 6. 10 > , 15. 30. 5. 2014. 5. 21. > > > > , _ . > > Intergovernmental Panel on Climate Changes) > > > [27]. 80 ������ ������ �� ...
    ... 17�21. J Norway. A. A. Balkema, Rotterdam, Netherlands. Vol. I. 53�74. [31] Kru�i� J., Andrejev K., Abolmasov B., Marjanovi� M. (2017). Prelimin of the Selanac debris flow modelling in RAMS � a case study. Proce Regional Symposium on Landslides in the Adriatic-Balkan Region � A Landslide Research ...
    ...  ��������� ����› (R � ). 21. > 69 > 7 v v [8], [9], [10], [11], [12], [13], > _ > > 1 > [8] > > > ») (1)R = H > >», A , Vv. - > > (Landslifie Hazard > - > > >, > i P(A x PINx S H (2) > > >. 1 A, N e > Ss >» > (Landslide )Susceptibility > > > > > > , > , > > > > > (Exposure > (> > ) > / > Vulnerability > > ...

  • Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization

    Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić (2016)

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology

  • 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
    ... removal of 44 amino acids, from its amino terminus, to give a single chain enzyme with a low pl and three disulfide bridges. Each lobe of pepsin contains a catalytic aspartic acid residue Asp?? and Porcine pepsin A (EC 3.4.23.1), a prominent member of the aspartic protease, is the principal ...
    ... decreased in a dose dependent manner (Figure 5 B). Figures 5 A and B shows only UV spectra in a presence ofIO0mM AP?. IR studies. IR spectra of pepsin and haemoglobin in KBr matrices in absence (solid curve 1) and in a presence 1IOmM Al ions (dotted curve 2) are presented in Figures 6 A and B. ...
    ... slope or intercept), (I/A) against 1 / [Al3+], where A is defined as slope or intercept in the absence of activator (Al' + ions) minus that in its presence. (1,5, 10mM) and intensity of characteristic peaks have been decreased in a dose dependent manner (Figure 5 A). However, the presence of ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)

    Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)
    The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...
    Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD
    ... average unit cell values calculated as a mean of 14 measurements are a = 5.748(06) A, b = 5.680(85) A, c = 5.775(42) A, and B = 112.05(95)?*. The calculated val- ues for Drenjak locality, the mean of four measurements, are: a = 5.744(8) A,b= 5.678(55) A, c=5.774(03) A, and P = 112.05(65)”. As reported ...
    ... electron diffraction (SAED) of the pristine, homogenous region of arsenopyrite crystal are a =5.75 A,b =5.68 A, c= 5.76 A, a, y = 90*, and 8 = 111.5 . - TEM analysis of analysed arsenopyrite confirms a monoclinic crystal system, space group P2y-. We identified numerous polysynthetic {101} twinning ...
    ... average unit cell parameters measured by XRPD of near-stoichiometric arsenopy- rite from the Drenjak locality, as a mean of four measurements, are a = 5.744(8) A, b =5.678(55) A, c = 5.774(03) A, ., y = 90*, and 8 = 112.05(65) ?*. - The unit cell values calculated from the thin TEM sample using selected ...

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...

  • A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić (2012)
    This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...
    multilingual digital libraries, query expansion, TMX
    ... the INFOtheca collection in two different ways. A typical search, yielding a set of aligned concordances is a full text search based on a query, and we will discuss this type of search shortly. However, Bibliša offers also the possibility of a monolingual search of metadata, associated with ...
    ... [TMX, 2005]. TMX uses ISO standards for country and language codes, as well as for date and time. A TMX document consists of a header (metadata describing the aligned texts) and a body, containing a set of translation units (TU) composed of two or more semantically equivalent translation unit ...
    ... expansion, depending on the user’s preferences. Query expansion is basically handled by a web service (wsQueryExpand.asmx) and a web application (VebRanka). VebRanka, a workstation for query expansion, was developed as a web extension of our multipurpose tool LeXimir [Stankovic et al., 2011], with ...

  • Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia

    Predrag Radović, Miloš Radonjić, Emmanuel Billia (2020)
    Finds of Pleistocene rhinoceros are rare in Serbia, and only one species (the woolly rhinoceros Coelodonta antiquitatis Blumenbach, 1799) has been reported so far. The current paper presents the dental material of an extinct so-called Hundsheim rhinoceros, Stephanorhinus hundsheimensis Toula, 1902 from Bogovina Cave (East ern Serbia). Both the morphological and metric characteristics of the teeth are consis tent with the attribution to S. hundsheimensis. Unfortunately, the rhinoceros material originated from an uncertain geological context, so there is no ...
    rhinoceros, Stephanorhinus hundsheimensis, Serbia
    ... 44:33-38. Lisiecki, L.E. and Raymo, M.E. 2005. A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records. Paleoceanography, 20:PA1003. https://doi.org/10.1029/ 2004PA001071 Madurell-Malapeira, J., Minwer-Barakat, R., Alba, D.M., Garcés, M., Gómez, M., Aurell-Garrido, J., Ros-Montoya, S ...
    ... assessed. There is a rather strong crista and a large crochet; there is also a small second crista located between the cro- chet and the crista. The medisinus is open. Only a FIGURE 5. Fragmented upper teeth of Stephanorhinus hundsheimensis from Bogovina Cave: right M1/M2 HMP-136 in (A) occlusal and (B) ...
    ... crown as well. A right p2 known as HMP-139a (Figure 6K-O) represents a small-sized, yellow-grey crown in an excellent state of preservation, with only a mild degree of occlusal wear in its mesial portion; roots are missing. The crown displays a much reduced paralophid and metalophid, a well-developed ...

  • The preliminary selection of oil reservoir in Serbia for carbon dioxide injection and storage by a multicriteria decision-making approach: a case study

    Lola Tomić, Vesna Karović Maričić, Dušan Danilović (2021)
    geološko skladištenje CO2, naftna ležišta, Srbija, VIKOR, TOPSIS

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... adhere; to unite in a mass. clog.v.06 fill to excess so that function is impaired to obstruct so as to hinder motion in or through; to choke up; . clog.v.04 impede with a clog or as if with a clog to burden; to trammel; to embarrass; to perplex. clog.v.05 coalesce or unite in a mass Figure 1: Sense ...
    ... (2014) describe a technique for constructing an n-way alignment of LSRs and applied it to the produc- tion of a three-way alignment of the English WordNet, Wikipedia and Wiktionary. Niemann and Gurevych (2011) propose a threshold-based Personalized PageRank method for extracting a set of Wikipedia ...
    ... Although most of the re- sources have a correlation of [1, 2] which indicates a rel- atively similar granularity of senses in the two resources, Danish and English (NUIG) represent higher correlations. In the case of Danish, a correlation of 24.8 demonstrates a huge difference in how senses are expanded ...

  • Zaštita od miniranja

    Suzana Lutovac, Miloš Gligorić (2024)
    Miniranje

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... HW110g was a fine powder which could also be investigated without grinding. XPS was measured on a Phi5000 VersaProbe II from ULVAC- Phi Inc., USA with a monochromatic Al K, source at 1.486 keV, 50 W, 15 kV and with a 200 m spot. For the survey spectra, a pass energy of 187.5 eV was set with a step width ...
    ... MI, Gao B, Yao Y, Xue YW. Zimmerman A, Mosa A, et al. A review of biochars as a low-cost adsorbent for aqueous heavy metal removal. Crit Rev Environ Sci Technol. 2016; 46: 406–—433. https://doi.org/10.1080/10643389.2015.1096880. Enaime G, Bacaoui A, Yaacoubi A, Liibken M. Biochar for wastewater ...
    ... at 500 "C with a contact time of < 2 s from chopped spruce (Picea spec.) wood chips after drying to a moisture content of less than 10% [67]. HW500f was pro- duced by fast pyrolysis of hard wood in a fluidized bed reactor at 500 "C with a contact time of < 2 s. It was received as a fine powder from ...

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)

    Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov (2019)
    Geography, Planning and Development,Aquatic Science,Biochemistry,Water Science and Technology
    ... geologic/hydrogeologic conditions require a comprehensive research approach to the interaction of groundwater and the water transported by a pressurized tunnel. Most studies dealing with this subject matter consider the problem of rapid groundwater inflow into a tunnel [4–9] and issues of structural stability ...
    ... geologic/hydrogeologic conditions require a comprehensive research approach to the interaction of groundwater and the water transported by a pressurized tunnel. Most studies dealing with this subject matter consider the problem of rapid groundwater inflow into a tunnel [4-9] and issues of structural stability ...
    ... for one hour and then evacuating the water via a bypass for 30 min. Observation of summary losses lasted for seven hours. Frequent monitoring of the observation wells along the tunnel, as well as at the control gate, was performed using a TD-Diver with a 2 min sampling interval. Vertical probing of water ...

  • 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

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... fuzzy proposition. This is a procedure for representing a statement that includes linguistic variables based on available information about the considered engineering system [17]. A definition of structure and interdependence of linguistic variables is carried out in a coordinate system of membership ...
    ... fuzzy proposition. This is a procedure for representing a statement that includes linguistic variables based on available information about the considered engineering system [17]. A definition of structure and interdependence of linguistic variables is carried out in a coordinate system of membership ...
    ... partial indicators (A, B, C) into one (M) is performed by fuzzy composition, which is a model that provides the structure of indicators-influencing M performance. In other words, if the influence indicators A, B and C are presented as fuzzy numbers [20], their composition provides a fuzzy number which ...

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... mutual interoperability a critical issue. One of the means to secure this interoperability within a specific domain is the use of ontologies, containing a comprehensive common domain vocabulary. This means that all terms used within a domain need to be standardized, with a clear and unambiguous ...
    ... knowledge management (KM) provides a useful perspective from which to view the problem (Vaught et al., 2006). KM is a systematic approach to finding, selecting, organizing, processing and presenting information with the aim of improving an employee’s comprehension within a specific domain, thus enabling ...
    ... building a general reference resource for mining terminology in Serbian. The niche for this resource was found in SUKU, a mining engineering information system, also developed at FMG (Stanković et al, 2012). Given the importance, and at the same time, lack of ontologies in mining industry, a met ...