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271 items

  • Unapređenje održavanja dijagnostikovanjem stanja i ponašanja rotornih bagera on-line i off-line metodom

    Darko Daničić, Predrag Jovančić, Dragan Ignjatović, Taško Maneski (2009)
    dijagnostika, rotorni bager, on-line, off- line, revitalizacija

  • Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One

    Nemanja Stanic, Dragoslav Rakic, Josip Isek, Slavoljub Simic (2024)
    In order to solve serious traffic congestion in Belgrade, a number of studies regarding the Belgrade Metro construction have been carried out since 1973. However, only in 2019, the routes of the future metro lines 1 and 2 were de-fined as a part of the General Metro Construction Project. The lines are de-signed to intersect at the location of Sava Square, where an interchange met-ro station will be built. It represents a complex geotechnical structure consist-ing of three different ...
    metro station, geotechnical modelling, displacements

  • Tehno-ekonomska analiza varijanti sistema odvodnjavanja površinskog kopa Drmno od podzemnih voda do kraja eksploatacije

    Tomislav Šubaranović, Dušan Polomčić, Vladimir Pavlović (2018)
    Odvodnjavanje površinskog kopa Drmno od podzemnih voda je jedan od najznačajnijih podsistema u procesu eksploatacije u veoma zavodnjenoj radnoj sredini Kostolačkog basena uglja. Već od 2006. godine, Inovirani dugoročni program razvoja eksploatacije uglja predviđa izradu ekrana, pored zadržavanja postojećih standardnih metoda odvodnjavanja od podzemnih voda linijama bunara. Iako je kasnijim Glavnim rudarskim projektom, takođe, bila predviđena izrada ekrana, njegova realizacija nije započela. Na osnovu realnog sagledavanja postojeće projektne dokumentacije, početak izrade ekrana se predviđa od 2023. godine. ...
    odvodnjavanje, bunari, ekran, dinamika, finansiranje.

  • The mean value of the Riemann zeta-function on the critical line

    Ivić Aleksandar (2014)

  • Опрема за континуалну контролу квалитета угља, on-line анализатори

    Кнежевић Динко, Колоња Божо, Игњатовић Драган, Деушић Славен, Вучинић Душица, Томанец Рудолф (2011)

  • Size–strain line-broadening analysis of anatase/brookite (TiO<sub>2</sub>)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis

    Aleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Vladimir Lazović, Danica Bajuk-Bogdanović, Jugoslav Krstić, Maja Šćepanović (2022)
    A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results ...
    Materials Chemistry, Metals and Alloys, Atomic and Molecular Physics, Optics, Electronic, Optical and Magnetic Materials

  • Organic geochemistry of Мiocene oil shales from the Аleksinac deposit (Serbia)

    Stojanović Ksenija, Kostić Aleksandar, Šajnović Aleksandra, Nytoft Hans Peter, Jovančićević Branimir (2013)

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja
    ... scale and observing the profile line as a whole would produce the loss of model features. Because of the overwhelming heterogeneity of the subsurface it was strived to maintain the maximal amount of details of 2D models, and because of that units of the same profile line can have different resistivity ...
    ... resistivity scales. Part three of the profile line I has a length of 124 m (Figure 4). A high value resistivity zone with a length of 56 m (252 m to 308 m of the profile line) can be noticed and it represents most likely sand, gravel and other construction materials. Decomposed waste has a lens-like ...
    ... of the subsurface geometry. The sand lens is active around the mark of 360 m and it gains maximal thickness along the middle survey line. The last profile line (Figure 6, bottom) shows again a decrease of thickness of the sand lens. The profile lines are at a mutual distance of 5 m. Figure ...

  • Cytotoxic activity of tetradentate Schiff Base Copper(II) complexes

    Nevenka Gligorijević, Aleksandar Mijatović, Sandra Aranđelović, Rada Baošić (2021)
    Istraživanje kompleksa bakra kao potencijalnih antikancerogenih agenasa nudi ohrabrujuće perspektive u odnosu na komplekse platine (II) računajući na smanjenu toksičnost, novi mehanizam delovanja, različit spektar aktivnosti i perspektivu neunakrsne rezistencije. Kompleksi Šifovih baza bakra(II) koji sadrže tetradentatne ligande acac2en tipa (acac2en (1); tfacac2en (3), acactfacacen (4), acacphacacen (6)) pokazali su važnu antioksidativnu aktivnost, visok potencijal za interakciju sa HSA i DNK, u prethodnim studijama. Zbog toga je bilo interesantno ispitati i uporediti potencijal antikancerogene aktivnosti in vitro, u odnosu ...
    Bakar(II) kompleksi, citotoksičnost, ćelijski ciklus

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... = 1, 2, ..., N). If we connect points (Ri, vi), (i = 1, 2, ..., N) with straight lines, then we will obtain a polygonal line (Figure 2). The surface confined by this polygonal line, R-axis, and the lines R = R1 and R = RN, we mark as ST. In this way, we obtained N-1 of the trapezoid. The sum of their ...
    ... (i= 1, 2, ..., N). If we connect points (R;, v;), (i= 1, 2, ..., N) with straight lines, then we will obtain a polygonal line (Figure 2). The surface confined by this polygonal line, R-axis, and the lines R = Ry and R = Ry, we mark as Sr. In this way, we obtained N-1 of the trapezoid. The sum of their ...
    ... distance R. In order to assess the degree of connection between v and R, we have used the curved line dependency index ρ [9]. The evaluation of the relationship degree of two variables [5] to values of the curved line dependency index ρ is given in the following survey: ‚ 0.0 < ρ < 0.2—none or highly poor ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... B, (27) where: B = b + 3. (28) If we connect points Mi(xi, yi + 3) by line segments Mi Mi+1(i = 1, 2, ..., N − 1) we will get one broken line. In so doing, the area bounded by x-axis, line segments x1M1 and xN MN and broken line, consisting of (N − 1) trapezoid [12,13], has the value: ST = 1 2 [ N−1 ...
    ... distance R. To assess the degree of connection between v and R, we have used the curved line dependency index ρ [14,15]. The evaluation of the relationship degree of two variables [7] to values of the curved line dependency index ρ is given in the following survey: 0.0 < ρ < 0.2—none or highly poor ...
    ... we will obtain equation: logv = logK − n·logR. (21) By introducing the change: logv = y; logK = b; −n = a; logR = x, (22) Equation (21) becomes a line equation: y = ax + b. (23) Minerals 2018, 8, 70 7 of 18 We will increase ordinate values y = logv by one positive number c, so that all points ...

  • Geotehnički uslovi izgradnje metro stanice „Savski trg“ – beogradski metro linija 1

    Dragoslav Rakić, Nemanja Stanić, Josip Išek, Slavoljub Stojković (2023)
    Ukrštanje linija 1 i 2 beogradskog metroa, planirano je na lokaciji “Savski trg” gde će se izgraditi zajednička metro stanica. Zbog složene konstrukcije objekta i različite dubine dijafragmi, koja na delu metro linije 2 iznosi preko 40 m, planirana je fazna izgradnja. U vezi sa tim u radu je prikazan način definisanja geotehničkog modela, kao i geotehnički proračuni u kojima su analizirani: fazni načini iskopa, filtraciona analiza, uticaj pornih i efektivnih napona na stabilnost dijafragme, horizontalna i vertikalna ...
    beogradski metro, metro stanica, geotehnički model, stabilnost dijafragme, horizontalna pomeranja, vertikalna pomeranja

  • In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge

    Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić (2023)
    The biological activity of six structurally similar tetradentate Schiff base copper(II) complexes, namely [Cu(ethylenediamine-bis-acetylacetonate)] (CuAA) and five derivatives where two methyl groups are replaced by phenyl, (CuPP), CF3 (CuTT) or by mixed groups CH3/CF3 (CuAT), Ph/CF3 (CuPT), and Ph/CH3 (CuAP) has been investigated. The set of antioxidant assays was performed, and the results were expressed as IC50 and EC50 values. The series of complexes showed interesting bioactivity and were investigated for the determination of antioxidant, antifungal, antimicrobial, and cytotoxic ...
    Inorganic Chemistry, Biochemistry

  • In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge

    Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić (2023)
    The biological activity of six structurally similar tetradentate Schiff base copper(II) complexes, namely [Cu (ethylenediamine-bis-acetylacetonate)] (CuAA) and five derivatives where two methyl groups are replaced by phenyl, (CuPP), CF3 (CuTT) or by mixed groups CH3/CF3 (CuAT), Ph/CF3 (CuPT), and Ph/CH3 (CuAP) has been investigated. The set of antioxidant assays was performed, and the results were expressed as IC50 and EC50 values. The series of complexes showed interesting bioactivity and were investigated for the determination of antioxidant, antifungal, antimicrobial, and ...
    Inorganic Chemistry,Biochemistry

  • Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations

    Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković (2024)
    The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...
    dip-slip faults, vertical gravity gradients, field data analysis
    ... position of the zero value moves from the fault line (the shallowest point of the fault in the models on Fig. 1 and Fig. 2, indicated by the dashed line on the graphs) depending on a dip angle of the fault. As the dip decreases, the fault line moves toward the VGG extreme, but always stays somewhere ...
    ... For the vertica! fault, curve shows symmetry, absolute values of VGG minimum and maximum are equa] and the zero value is directly above the fault line. That makes vertical and subvertical dip- slip faults easily recognizable on the vertical gravity gradient profiles and maps. Four basic situations ...
    ... vertical gravity gradient curve above the inclined fault is asymmetric in shape. The shape of the curve around the extreme value closer to the fault line (dashed lines on the graphs on Fig. 1 and Fig. 2) is sharper and narrower, while the other extreme has more rounded shape. The general orientation ...

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction
    ... Linked Data (on-line) 2 The classification of documents from a medical domain based on ontologies is the subject of research by a number of teams, using different approaches, but as an ontology, MeSH is most often used. 3 Access point (on-line) 4 RDF triplets (on-line) 5 MeSH ontology (on-line) 56 Infotheca ...
    ... their name. On the other hand, the documents were reduced only to the occurrences of terms (concept names from MeSH ontology) that, with 7 IR notes (on-line) 58 Infotheca Vol. 19, No. 1, September 2019 Scientific paper the simple mapping (stored in their identifiers in the ontology itself), are identified ...
    ... removed. This reduced the file size over 450 times (new size: ∼0.5MB). Upon completion of the transformation, a new file is formed. In it, each new line represents a new document: it begins with the title of the document (without extension) followed by a semicolon, and all the concept identifiers found ...

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... ribs here probably occurs at the level of the coiling line. Adult specimens have low whorls and a broad umbilicus. The last whorl is weakly arched. It transitions rather abruptly into a narrow ventral side. The whorl at the base falls off with a not-very high, but clearly defined, oblique umbilical ...
    ... flanks of the whorl are only slightly arched. Around the line of coiling, the whorl descends roundly to the umbilicus in a short section. The very thin and very dense ribs begin with the simple primary ribs at the line of coiling. Near the line of coiling, they are slightly concave in a short section ...
    ... venter. The flanks smoothly transition to the line of coiling. The umbilicus is broad. The sculpture is different in two parts of the whorl. The initial part of the last whorl is covered by thin and dense ribs. They start as primary ribs on the line of coiling: without tubercles. They are distinctly ...

  • Pre-failure deformation monitoring as rockfall prediction tool

    Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić (2021)
    General Engineering
    ... scan (figure 3-4). In addition, a vertical profile line was constructed to extract cross-sections from point clouds for each sequence at the same position and provide 2D impression (XZ) of the componential and total displacements. Profile line is placed across the most active part of the AOI selection ...
    ... analysis of pre-failure stages by comparing against numerous (weekly collected) sequences. They further emphasize the common errors originating from the line-of-sight referencing, i.e., using normal vector for detecting changes, and suggesting geometric corrections especially in oblique surfaces and steep ...
    ... study site. We tried to extract the deformation threshold as exampled in abovementioned case studies and estimate the total vectors instead of its line-of-sight component as suggested by [4]. 2. Study site Location of interest is positioned along IB22 highway, some 5 km to the south of the town ...

  • 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
    ... en and medicine.sr). These files are later fed into GIZA++. Afterwards, a user has to upload a list of English terms. The first line should contain a header, and each line should contain one term. 12 BILingual Terminology Extraction Infotheca Vol. 19, No. 2, December 2019 131 Šandrih B., Stanković ...
    ... “Extraction of Bilingual . . . ”, pp. 119–138 Finally, a user has to upload a list of terms in Serbian (not necessarily MWUs). The first line is a header, each line contains a term and its frequency (for filtering later), separated with | (“pipe” character). The interface of this module is displayed ...
    ... method on a Library and In- formation Science domain. The obtained re- sults, as well as the application that imple- ments the method, are available on-line. KEYWORDS: terminology extraction, terminology validation, GIZA++, graphs, Unitex, text classification. PAPER SUBMITTED: 30 September 2019 PAPER ACCEPTED: ...

  • Some examples of interactions between certain rare earth elements and soil

    Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski (2021)
    Freundlich adsorption isotherm, sequential extraction, metallic ions, ICP-OES
    ... into the 100 mL volumetric flasks. The sediments were rinsed three times with 10 mL distilled water each and filled up with distilled water up to the line. The solutions prior to mixing and the solutions after the mixing were analyzed by ICP-OES. The values have been presented in Table II.17 The values ...
    ... Freundlich adsorption isotherm. Parameters for adsorption intensity (n) and Freundlich isotherm constant (kf) are determined in the equation of the line, according to the equation (3). Also, the sorption capacity or elimination efficiency was determined as well and which represents the ability of ...
    ... left to age for 12 hours for as better separation of phases. The liquid phases were filtered into 250 mL volumetric flask and were filled up to the line. The sediment was rinsed with bidistilled water up to negative reaction to ammonia ion and returned to the initial bottles. Phase II: in each bottle ...