Претрага
297 items
-
Improving efficiency of thermal power plants through mine coal quality planning and control
Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B
-
Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?
Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov. "Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?" in EGU General Assembly 2024, Vienna, 14-19 April 2024, Göttingen : Copernicus GmbH (2024). https://doi.org/10.5194/egusphere-egu24-568
-
Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija
Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)... for these alternatives are given in Figure 3. Figure 4 shows a diamond PROMETHEE solution. This solution shows partial PROMETHEE I and final ranking PROMETHEE II in a two-dimensional model. The PROMETHEE diamond solution is presented with the dot on (Phi+,Phi−) flat. The flat is at an angle of 45◦ so ...
... through which comes discharge of atmospheric waters from the landfill directly into the Ibar. Deposed flotation tailing is in general oxidized and solid [1]. č č č č đ ć ć ć đ đ ć Figure 2. Tailing pond Gornje Polje (a)—not active; and tailing pond Bostanište (b)—active. Flotation tailing ...
... Drainage water from the landfill is collected and taken directly into the Ibar. Surface of the tailing is oxidized and red. On the sides of the dam, solid parts are noticeable. Due to the fact that raising the upper level of the dam is no longer possible since its construction stability is in danger, there ...Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić. "Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija" in Energies, MDPI AG (2016). https://doi.org/10.3390/en9110935
-
The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Dragana Ž. Živojinovic, Vladana Rajaković-Ognjanović, Huang Fen, Cao Jianhua. "The subthermal potential of karstic groundwater of Kučaj–Beljanica region in Serbia estimated by the multivariate analysis" in Environmental Earth Sciences, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s12665-021-09392-1
-
EUROLAN 2021: Introduction to Linked Data for Linguistics Online Training School
Prva škola za obuku polaznika koju je organizovala COST akcija NexusLinguarum održana je od 8. do 12. februara 2021. godine sa ciljem da studenti, istraživači i stručnjaci nauče osnove lingvističke nauke o podacima. Tokom obuke polaznici su se upoznali sa širokim spektrom tema: od semantičkog veba, RDF -a i ontologija, do modeliranja i pretraživanja jezičkih podataka pomoću najsavremenijih ontoloških modela i alata. Škola je održana u okviru serije letnjih škola EUROLAN-a i organizovalo ju je virtuelno (onlajn) nekoliko instituta; ...nauka o lingvističkim podacima, povezani podaci u lingvistici, jezički podaci, EUROLAN, NexusLinguarum, COST akcija, škola za obuku... and Corpus Information - Ontology-Lexica Community Group 116 Infotheca Vol. 21, No. 1, September 2021 Professional paper a chance to acquire a solid foundation before moving onto more complex sessions. The official program of the school is available online.13 As a follow up, the JeRTeh14 Language ...
... the lecturers proposed an exercise and offered a step-by-step walk-through for the participants to understand the methodology leading towards the solution. They also intro- duced the basic technology needed. Then, during the exercise session, the participants were asked to work on a particular task like ...Milan Dojchinovski, Julia Bosque Gil, Jorge Gracia, Ranka Stanković. "EUROLAN 2021: Introduction to Linked Data for Linguistics Online Training School" in Infotheca, Faculty of Philology, University of Belgrade (2021). https://doi.org/10.18485/infotheca.2021.21.1.7
-
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... of HCI-treated char was shaken with 25 ml of0.05 mol1! NaOH for 24 h to extract organic components of low molecular weight. The solid was separated from the solution by filtration using 0.45 um nitrocellulose fil- ters. The absorbance at 250 nm (A250) was measured as a qualitative index of dissolved ...
... outside the bronze electrodes was only filled with electrolyte and the filling height of the solid material was about 2.5 cm. The exact height was measured with a caliper rule. Since the surface of the solid mixture was not exactly flat in the rectangular sample holder, the accuracy of the cell constant ...
... The materials were filled into the sample holders in portions. Therefor, some electrolyte was first poured into the sample holders and then the solid materials were added so that a slight excess ofliquid remained. This mixture was stirred with a spatula in PLOS ONE | hitps://doi.org/10.1371/journal ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
-
Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach
Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...... plasma and supernatants by solid-phase extraction using Oasis HLB cartridges (Waters Corporation, Milford, MA, USA). The cartridges were pre- Pharmaceutics 2021, 13, 1188 6 of 19 conditioned by methanol and water and then loaded with samples and internal standard solution, while the endogenous impurities ...
... approach. Generally, poorly soluble substances can be characterized as brick dust or grease balls depending on the limiting factor for the solubility: solid-state or solvation process [3,5]. Brick dust substances are poorly soluble in an aqueous environment as well as in lipids and organic solvents, and ...
... curve (AUC) in plasma were similar in the fasted and fed state (p = 0.998 and 0.100 for Cmax and AUC, respectively, Student t-test). In investigated solid tissues, although average values of AUC seem to be different, even two times higher in the group of fed animals, statistically the differences were ...Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić. "Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach" in Pharmaceutics, MDPI, Basel, Switzerland (2021). https://doi.org/10.3390/pharmaceutics13081188
-
Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
-
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 polynomialsDragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
-
Development Of The Serbian Geological Resources Portal
... searching cata- logues: projects, archive documentation and bibliog- raphy, documentation of the funds and research- exploitation permits for water and solid mineral resources10. The above-mentioned searches were derived from the basic model which is based on mul- tiple entry of key words, phrases, different ...
... Google Maps API6. During the development of the portal, the emphasis was placed on the use of modern technologies. Thus, the result was a comprehensive solution, visually and technologically in compliance with modern concepts in the creation of web applica- tions, offering the user a simple and intuitive interface ...Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić. "Development Of The Serbian Geological Resources Portal" in Proceedings of the 17th Meeting of the Association of European Geological Societies, Belgrade, Serbia : The Serbian Geological Society (2011)
-
Numerical modeling of Selanac debris flow propagation using SPH code
The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...... INTRODUCTION Debris flows occur usually after saturated, mainly poorly sorted material, started to flow down the slope as a result of motion of solid and fluid phase. Different mechanisms, rheological and numerical models are used in this area of research. Generally, there are mainly two groups ...
... the available approaches treat the heterogeneous and multiphase moving mass as a single-phase continuum. The others are considering two phases, solid and liquid, i.e. a granular skeleton with voids filled with either water or mud. If the shear resistance of the fluid phase can be neglected, the ...
... most used methods like finite element and finite difference methods, is in absence of numerical grid, and while mass is presented with particles of solid and fluid phase. Each particle has information about height, velocity as well as pore water pressure if coupled model is included. Geoflow SPH proposed ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
-
An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System
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 ...... defined on basis of data on equipment and locations. The technological chain of production is being elaborated through production operations. The solution encompasses the data on all production capacities in the technological chain of production, the data on all production events and subjects, as well ...Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović. "An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System" in Proceedings of the Fifteenth International Symposium on Mine Planning and Equipment Selection, Torino, Italy, September 2006, Vol. 1,, Balkema (2006)
-
Развој геолошког терминолошког речника ГеолИССТерм
... 4. Software solution The application was developed using mS vi- sual Studio and the programming languages c# and Aspx, while the data were stored in the mS SQl Server 2008 data management system. This section features a brief description of the compo- nents of the software solution which consists ...Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić. "Развој геолошког терминолошког речника ГеолИССТерм" in INFOteka: časopis za informatiku i bibliotekarstvo, Beograd : Zajednica biblioteka univerziteta u Srbiji (2011)
-
Towards Automatic Definition Extraction for Serbian
U radu su prikazani preliminarni rezultati automatske ekstrakcije kandidata za definicije rečnika iz nestrukturiranih tekstova na srpskom jeziku u cilju ubrzanja razvoja rečnika. Definicije u rečniku Srpske akademije nauka i umetnosti (SANU) korišćene su za modelovanje različitih tipova definicija (opisnih, gramatičkih, referentnih i sinonimskih) koje imaju različite sintaksičke i leksičke karakteristike. Korpus istraživanja sastoji se od 61.213 definicija imenica, koje su analizirane korišćenjem morfoloških e-rečnika i lokalnih gramatika implementiranih kao pretvarači konačnih stanja u paketu za obradu korpusa otvorenog ...... automatic extraction of definitions from the text has not been thoroughly researched for the Serbian language so far. The assumption is that its solution could significantly contribute to the acceleration of the development of the SASA dictionary, as well as other dictionaries. Definition extraction ...
... design of a lexical database that can store a structured record of a dictionary article in a relational structure, and the development of a software solution that transforms the unstructured text of a Word document into a relational database (Stanković et al. 2018). These preliminary steps led to the ...Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić. "Towards Automatic Definition Extraction for Serbian" in Proceedings of the XIX EURALEX Congress of the European Assocition for Lexicography: Lexicography for Inclusion (Volume 2). 7-9 September (virtual), Democritus University of Thrace (2021)
-
Formative evaluation of e-learning projects with the logical framework approach
... resources can be published in different original languages, with adequate support offered for their translation. The conceptual model of the ICT solution for BAEKTEL OER framework envisages a network of nodes offering OER content and a central repository, the BAEKTEL Metadata Portal (BMP), where ...Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković. "Formative evaluation of e-learning projects with the logical framework approach" in The Sixth International Conference on e-Learning (eLearning-2015), September 2015, Belgrade, Serbia, Belgrade Metropolitan Univesity (2015)
-
Electronic Dictionaries - from File System to lemon Based Lexical Database
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 ...... produce a central lexical repository that will enable mul- tiuser distributed management of lexical data, overcoming the main problem of the existing solution – local, single- user editing of dictionaries in textual form. The new lexi- cal database should also enable of its content export in var- ious ...Ranka Stanković, Cvetana Krstev, Biljana Lazić, Mihailo Škorić. "Electronic Dictionaries - from File System to lemon Based Lexical Database" in Proceedings of the 11th International Conference on Language Resources and Evaluation - W23 6th Workshop on Linked Data in Linguistics : Towards Linguistic Data Science (LDL-2018), LREC 2018, Miyazaki, Japan, May 7-12, 2018, European Language Resources Association (ELRA) (2018)
-
Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone
Aleksandar Luković (2021)Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...... Short- and long-range ordering in the ilmenite-hematite solid solution, Phys. Chem. Miner., 28, 399 – 412. Harrison, R. J., Stone, H. J., Redfern, S. A. T., (2006): Pressure dependence of Fe-Ti order in the ilmenite-hematite solid solution: implications for the origin of lower crustal magnetization ...
... , (1974): Cation distribution and local variation of site symmetry in solid solution series, Fe3O4-Fe2TiO4. Mineralogical Journal, 7, 472–488. Ghiorso, M. S., & Evans, B. W., (2008): Thermodynamics of Rhombohedral Oxide Solid Solutions and a Revision of the Fe-Ti Two-Oxide Geothermometer and Ox ...
... A valid Margules formulation for an asymmetric ternary solution: revision of the olivine ilmenite thermometer, with applications. Gcochim. Cosmochim. Acta., 45, 847-853. Andersen, D.J., Lindsley, D.H., (1988): Internally consistent solution models for Fe-Mg-Mn-Ti oxides: Fe-Ti oxides. American ...Aleksandar Luković. Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone, Beograd : [A. Luković], 2021
-
An Approach to Development of Bilingual Lexical Resources
... Dictionary of Librarianship were not sufficiently developed to secure optimal performance of the system. Although it might have seemed that a solution of this problem should be looked for in the refinement of these resources, we opted for the development of a third bilingual lexical resource ...Stanković Ranka, Obradović Ivan, Trtovac Aleksandra. "An Approach to Development of Bilingual Lexical Resources" in Proceedings of the Fifth Balkan Conference in Informatics BCI 2012, Workshop on Computational Linguistics and Natural Language Processing of Balkan Languages – CLoBL 2012, September 2012, Novi Sad : BCI (2012)
-
Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata
... mining engineers, geologists,...) can have a clear picture of the entire system, and at the same time easily access alphanumeric data. The outlined solution is only the first step in creating an integral GIS system for a mine. Hence, further research in this area will focus on extension of the OpmGIS ...Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović. "Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata" in Podzemni radovi, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2012)
-
Managing mining project documentation using human language technology
Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentationAleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja . "Managing mining project documentation using human language technology" in The Electronic Library (2018). https://doi.org/10.1108/EL-11-2017-0239