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271 items

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps

  • 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
    ... suggested the direct bandgap in the V»Os nanoparticles based on the best line fitting of Kubelka-Munk functions. Still, in our case, it is impossible to decide the character of the allowed transition, considering the good quality of line fitting (Figure 6). In this work, the DFT approach was used to perform ...
    ... || — —— - -|----}-— — r s Y r 4 lj/ RT 4 Y T U x s LI High symmetry points Figure 7. Band structure of VOs The red dotted line denotes the Fermi level. The black line connects the top of the valence and the bottom of the conduction zones. As presented in Figure 7, it can be seen that the DFT ...
    ... (b) experimental UV spectra of MET, NAD, and PIN. UV spectra presented in Figure 8 indicate one more interesting, property of the PIN molecule, in line with the experimentally observed degradation efficiencies. Namely, aside from the excitations at wavelengths around 200 nm, the PIN molecule is also ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... intelligent system for support of decision making in the mine uses the combination of various IT technologies, such as OLTP (On Line Transactional Processing), OLAP (On Line Analytical Processing), WEB, SQL Server Reporting Services, etc. Hence, it is a system for direct analytical data processing ...

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... 000 7,428,000 7,430,000 » A NZ ELB drillhole 4, 91 0, 00 0 Water temperature *C 11 - 20 e 21-30 e 31-40 4, 90 8, 00 0 Cross section line 4, 90 6, 00 0 -| š 4, 90 2, 00 0 4, 90 0, 00 0 Figure 1. Location of the investigated area, basemap: OGK 1:100 000 sheets L-34-136 Valjevo ...
    ... stored in a dedicated database. Three main groups of base data were compiled: geological, hydrogeological data and geothermal indicators. Data (point, line, polygon, raster) were spatially analyzed in a GIS environment. Vranješ et al. [8] provide more details on applied methodology. 4. RESULTS AND DISCUSSION ...

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... texts. The problem discussed at that time was how many characters can be omitted while still allowing text reconstruction by humans. Following this line of research the first practical solutions to correcting spelling errors emerged. The idea of a program that corrects spelling errors is reported by ...
    ... are given in Table 1. Special attention is paid to hyphenated words. A hyphen in a Serbian OCR text can signify a word hyphenated at the end of the line or a hyphen in a multi-word. Our procedure first eliminates the hyphen and generates candidates by replacements, as illustrated by Table 1. For instance ...
    ... рахимХасапа*_*НбрахнмХаеана*... If the hyphen remains, then corrections are attempted only for Нбрахпм since Хасан is a valid word (Hasan, a mascu- line first name): *_*Нбрахнм*_*Нбрахим*_*Нбрахпм*_... *Ибрахнм*_*Ибрахпм*_*Ибрахим*... One of the candidates is ac- cepted – Ibrahim, a masculine first name ...

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction
    ... Sustainabilihy 2023, 15, 11146 8of1l4 (Figure 5), with the exception of the thermal water samples, which fall below the local isotope meteoric line (LIML), indicating a longer residence time within the system and a weak connection with atmospheric precipitation. -11.2 -11 -10.8 -10.6 -10.4 -10 ...
    ... and ŠD) of Krupaja system groundwaters (KC—Krupaja cold spring; KB—Krupaja Borehole B1; KT—Krupaja thermal spring; LIML—local isotopic meteoric line) (according to [12]). In addition, most of the Krupaja Spring results fall below the LIML, with the exception of the sample taken in September 2014 ...
    ... charge of the system after the highest maximum ever recorded at Beljanica Massif in May 2014. Other samples fall close to the local isotope meteoric line, indicating, a connection with atmospheric water, but also lie below the LIML, having a higher groundwater mean residence time and therefore indicating ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... inflection of Serbian compounds and the production of e-dictionary of compound forms uses a very simple morphosyntactic description. The following line describes the inflection of Serbian nouns: noun:(Nb,),(Case,), (Gen,),(Anim,) It states that categories number and case ...
    ... description. (Value w used for ‘paukal’ corresponds to the value t in MULTEXT-East, while values 2 and 4 correspond to g and a, respectively.) The last line in the above description gives important additional information: nouns marked by a semantic marker +Const in an e-dictionary do not inflect (e.g. ...

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

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... for support of decision making in safety management uses a combination of various information technologies, such as OLTP (On Line Transactional Processing), OLAP (On Line Analytical Processing), WEB, SQL Server Reporting Services, etc. Hence, it is a system for direct analytical data processing ...

  • Classification of mining waste landfills according to legislation in Serbia

    Dragana Nišić, Uroš Pantelić, Nikoleta Aleksić, Neda Nišić (2021)
    rudarski otpad, jalovina, uredba, deponija, kategorija A, klasifikacija
    ... rizika jalovišta, ukoliko bi do njega došlo [10]. Iako se u Uredbi prioritet daje „mokrim“ deponijama zbog njihovog potencijala plavljenja oko- line u slučaju rušenja nasipa, ne zaobilaze se i suve de- ponije od kojih preti opasnost od pojave klizišta jer „…svaka masa otpada u pokretu opasnost ...
    ... „značajne“ opasnosti/rizika, i niti jedna ugroženo ljudstvo ne deli na ono koje je zapo- sleno na deponiji i ono koje je nastanjeno u njenoj oko- lini [4, 13, 14]. Ova kontradiktornost dolazi do izražaja kada se sagledaju i neki realni primeri udesa na depo- nijama, poput onog koji se dogodio 2015 ...
    ... Budva, str. 355-361, Budva, 1997. [18] Kosovo-online: Dimkić: Izlivanje iz jalovišta kod Le- posavića nije prouzrokovalo ekološku katastrofu [on- line]. Dostupno na: https://www.kosovoonli-ne.- com/vesti/drustvo/dimkic-izlivanjeizjalovista- kodleposavicanijeprouzrokovaloekoloskukatastrofu [pristupljeno ...

  • 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

  • Numerical modelling of a single intra-oceanic subduction for the origin of the Balkan ophiolites

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA

    Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski (2017)
    Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...
    Pd(II), Selen, Substitucija, Kinetika, Mehanizam

  • Vebran Web Services for Corpus Query Expansion

    Ranka Stanković, Miloš Utvić (2020)
    U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.
    corpus search, web service, Serbian lexical resources, query expansion
    ... a lexical database. After years of development, SMD, developed as a system of textual files, have become a large and complex lexical resource. An on-line applica- tion for dictionary development and management, based on a central lexical data repository (lexical database) is developed offering various ...
    ... lemma: kap (“a drop”) vs. lemma kapa (“a cap”). The example page of search results for kapa (Figure 6), shows that the first and the last concordance line correspond to lemma kap. Although query expansion produces 100% recall, precision is reduced due to homographs. The problems with query expansion ...
    ... found in (Утвић et al., 2019) 15 Actually, this regular expression also includes noga i nima, but they are omitted to avoid text longer than length of line. 16 http://hlt.rgf.bg.ac.rs/vebran/api/sinonimi/post Infotheca Vol. 19, No. 2, December 2019 115 Stanković R. and Utvić M., “Vebran Web Service ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... for support of decision making in safety management described in this paper uses a combination of various information technologies, such as OLTP (On Line Transactional Processing), OLAP, WEB, SQL Server Reporting Services, etc. Hence, it is a system for direct analytical data processing implemented ...
    ... not recognize all the risks within the production process, which can be mitigated by the use of software to record all occurring incidents. In line with the examples of existing good international practices, the development of our system is focused on tracking records in a modern way, while respecting ...

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Грешка инклинације код депозиционе реманетне магнетизације

    Mirko Petković, Vesna Cvetkov (2019)
    ... MEĐUNARODNIM UČEŠĆEM II КОНГРЕС ГЕОЛОГА БОСНЕ И ХЕРЦЕГОВИНЕ СА МЕЂУНАРОДНИМ УЧЕШЋЕМ 316 calculated. The intersection point of the y-axis and the line that best approximates the obtained values represents the required flattening factor, on the basis of which, then, the inclination is calculated ...
    ... on, shown in this study, is based on the presumed geological age of the strata from which the samples were taken. The coefficient of the straight line that best approximates the tangent of the measured inclinations and the tangent of the assumed inclinations is inversely proportional to the flattening ...

  • A Mathematical Learning Environment Based on Serbian Language Resources

    Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan (2018)
    In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...
    mathematical content, text processing, mathematical formulae
    ... Geology, Belgrade, Serbia 3 University of Belgrade/Faculty of Philology, Belgrade, Serbia * marija.radojicic@uns.ac.rs Abstract: In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms ...

  • WS4LR - a Worksation for Lexical Resources

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović (2006)
    Lexical Resources, Wordnet, Serbian
    ... parameters and by the possibility of invoking command-line routines and using external Perl, Awk, and XSLT scripts. WS4LR functions and their usage are explained in a printed manual that accompanies the software, as well as in a concise on-line context sensitive help. cd WS4LR WS4LR projects + ...

  • Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty

    Miloš Gligorić, Jelena Majstorović, Suzana Lutovac (2018)
    ... anisotropy coefficients for isotropic samples follow each other and values tends to keep a straight line. In contrast, anisotropy coefficients for anisotropic samples have no tend to be a straight line and differences between each other are high and clearly expressed. 0.00 5.00 10.00 15.00 20 ...