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Упит dcterms_subject_txt:quality of service

2836 items

  • Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research

    Mirko Petković, Vesna Cvetkov, Branislav Sretenović (2014)
    магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија
    ... to the other half of the fi eld from the opposite side. From the analysis of the maps shown in Figures 5.b. and 5.c. it can be concluded that there was no diff erence in the quality of data. The acquisition of the last three measurements was carried out using the principle of “one tra- verse-one ...
    ... occurrence of linear anomalies along the direction of the acqui- sition. Comparing Figure 3.b. with Figure 3.c, it can be determined that the data quality does not de- pend on which side the operator circles around the test polygon. Also, using a combination of the second and third mode of measurements ...
    ... more than 60s (GSM-19 Instruction Manual 2008). According to the theory of proton precession on which this instrument is based, the orientation of the probe in non-equatorial areas should not af- fect the data quality. However, a common occur- rence during magnetic surveys is a linear anomaly along ...

  • 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)
    ... R—reduced distance, expressed as R “ r 3?Q . 2.1. Derivation of Equation of Rock Mass Oscillation Law 2.1.1. Derivation of Equation of Rock Mass Oscillation—First Mode The equation of Sadovskii has been derived from the condition that if the radius of charge and the distance from the blast site to the monitoring ...
    ... Record of soil oscillation velocity for blasting in the Veliki Krivelj Open Pit. 4.1.3. Calculation for Parameters of the Soil Oscillation Law in the Veliki Krivelj Open Pit The values of distance from the blasting point to the point of observation r, quantity of explosive Q, calculated values of reduced ...
    ... influence the process of exploration and exploitation, were noted in the deposit. Only after blasting do blocks of rock of 0.50 m3 occur, which could be attributed to the effect of small faults and karstified cracks in the deposit. By examination of physical and mechanical properties of the working environment ...

  • 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
    ... the growth of a set of test documents, its performance further decreases, which was not desirable in solving our task. In this paper, we experiment with a simple classification approach to evaluate the importance of timely management of large amounts of data, as well as the usable value of semantics ...
    ... considered the length of the identifiers, so they were replaced by a certain number of iterations of the parent class depending on their length, to test the assumption that the use of more specialized terms was more important for determining the class of documents. So, instead of reducing the identifiers ...
    ... paper is a result of a task 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 ...

  • Towards Automatic Definition Extraction for Serbian

    Ranka Stanković, Cvetana Krstev, Rada Stijović, Mirjana Gočanin, Mihailo Škorić (2021)
    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 ...
    ... word embeddings via multiple layers of neural networks (Veyseh et al., 2020). Barnbrook (2002) claimed that definition is a basic activity of language, of particular importance to linguists because of its use of language to describe itself. He described the subset of general language used in definition ...
    ... discusses the problem of dictionary definition modelling and methods for automatic extraction of candidates for dictionary definitions. The third section provides an analysis of lexical and syntactic characteristics of dictionary definitions in Serbian based on the corpus of definitions of nouns from the ...
    ... literary form (“see…”), or to a derived word that retained the meaning of the basic word (“diminutive of …”). These definitions are easy to model. The second group consists of “definitions” of some types of proper names, e.g. names of holidays, saints, monasteries, etc. These definitions are similar to ...

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... montmorillonite (25% of CEC), 34.5 mmol/100 g of Na-montmorillonite (50% of CEC), 51.75 mmol/100 g of Na-montmorillonite (75% of CEC), and 69 mmol/100 g of Na- montmorillonite (100% of CEC). The reaction mixture was continuously stirred on the magnetic stirrer, at the temperature of 50%C. After the mo ...
    ... dropwise addition of 100 mL of HDTMA or PTMA aqueous solution, with appropriate concentration of organic complex, into the aqueous suspension of the NaM clay. Four different concentrations of organic cations were selected for the monitoring of the herbicide adsorption: 17.25 mmol/100 g of Na- montmorillonite ...
    ... interaction between the aromatic benzene ring of S-metolachlor and the aromatic benzene ring of the organic complex (nm-n bonds). Also, the formation of a hydrogen bond occurs between the molecules of S-metolachlor and the molecules of water 329 SERBIAN SOCIETY OF SOIL SCIENCE Soils for Future under ...

  • FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... Serbian Society of Soil Science University of Belgrade, Faculty of Agriculture Supported by: Ministry of Education, Science and Technological Development of the Republic of Serbia Maize Research Institute “Zemun polje”, Belgrade, Serbia Semenarna d.o.o., Niš, Serbia Ministry of Agriculture ...
    ... 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 Serbian Society of Soil Science University of Belgrade, Faculty of Agriculture ...
    ... position. The intercalation of HDTMA+ cations into the interlayer space produces redshift of the IR bands that originate from the vibrations of the adsorbed water, as a consequence of the reduction of the hydrogen bond strength in HDTMA-montmorillonite. Also, the intensity of these bands decreases ...

  • The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system

    Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)
    The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...
    микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми
    ... Serbia “Innovation Center Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia SFaculty of Chemistry, University of Belgrade, Belgrade, Serbia ŠFaculty of Physical Chemistry, University of Belgrade, Belgrade, Serbia SCIENTIFIC PAPER UDC 547.533:66:544 DOI 10.2298/ ...
    ... a 1Fat·:ulty of Mining and Geology, Serbia IBG-3 Agrosph8are, Julich, Germany and Metallurgy, University of Belgrade, Belgrade, Serbia “Innovation Center Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia ŠFaculty of Chemistry, University of Belgrade, Belgrade ...
    ... efficiency of the surfactant [3-10]. Alcohol ethoxylate surfactants are widely used for microemulsion applications. The phase behavior with respect to the length of the hydrocarbon tails and the number of ethylene oxide (EO) units depends on the purity of alcohol ethoxylates. The structure of the ...

  • 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
    ... logging and groundwater quality analyses, are shown to be highly relevant in assessing geothermal characteristics. Elevated geothermal gradients (average about 6 "C/100 m), structural assembly, especially Kolubara and Banjska faults, as well as existing occurrences of thermal waters are identified ...
    ... es of part of the Triassic carbonate reservoir were estimated at the base of the Neogene sediment sequence and as maximal expected temperatures. The temperatures at the contact of the Triassic reservoir with the Neogene cover are calculated as a product of the values of geothermal gradients of the ...
    ... 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 ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... ANG, RUP are the quality indices of the paleostress calculations (for The 2 um-fraction K/Ar age (~ 198 Ma) of the sample from the Southern Triassic unit (sample 86A, Table 2) is significantly older than the ages from the other units. 5 Discussion 5.1 Interpretation of IC and K-Ar data ...
    ... 1 Introduction Emplacement of oceanic crust on top of continental mar- gins has been an object of particular interest since the observation of the large volumes of ophiolitic complexes exposed in Eurasia (Goffć et al. 1988; Robertson 2004). The understanding: of ophiolite obduction has been ...
    ... Petrology of low metamorphosed rocks of the central part of the Drina-Ivanjica Paleozoic: Bu//. Mus. Hist. Nat. Belgrade, A, 39, 13-139. Milovanovic, D., Marchig, V., and Stevan, K., 1995, Petrology of the crossite schist from Fruška Gora Mts (Yugoslavia), relic of a subducted slab of the Tethyan ...

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... Energy is essential to economic and social development of each community and improved quality of life of citizens. Energy demand in the world has a constant growth, which is driven by increased number of inhabitants and growth of life standard 1. Much of the world's energy is currently produced and consumed ...
    ... poor air quality, making this the world’s fourth-largest threat to human health, behind high blood pressure, dietary risks and smoking 4. Poverty and fossil fuel-intensive development and urbanization are determined as the main causes of air pollution 4. Emissions can be quantified at the level of total ...
    ... and improving air quality: Two global challenges, Environ Prog Sustain Energy. 2017 Jul; 36(4): 982–988 6. World Health Organization, https://www.who.int/sustainable-development/transport/health-risks/air-pollution/en/ (accessed 28.8.2019.) 7. Statistical office of the Republic of Serbia, Energy balances ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... gas/solid systems with special reference to the determination of surface area and porosity. Pure Appl. Chem. 1985, 57, 603–619. [CrossRef] 46. International Organization for Standardization. SRPS ISO 5667-10:2007, Water Quality. Taking of Sample. Part 10: Guidance on Wastewaters Sampling; International ...
    ... formation of the oxides and releasing of the water molecules during activation reactions or due to carbonization as well as decomposition of oxygen-containing functional groups at a high temperature [56–58], while presence of insignificant amounts of nitrogen can be a consequence of lagging of nitrogen ...
    ... which is equal to peaks intensity ratios of D– and G–bands (ID/IG). The ID/IG value is a measure of the crystallinity of the sample. The increase of its value corresponds to decrease of the crystallinity of the sample and vice versa [47,54]. From the literature [55] the ID/IG value lower than 0.25 indicated ...

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... overview of the field of CL/NLP is given in section 2 of this paper. In order to complement a lack of OER in Serbia we have decided to develop the OER course “Lexical Recognition in the Natural Language Processing (NLP)”. This course is offered at the University of Belgrade, Faculty of Philology ...
    ... first courses at University of Belgrade were introduced in 1994: in Mathematical and CL for students of General Linguistics and students of Serbian language at the Faculty of Philology, as well as NLP graduate courses for students of Mathematics at the Faculty of Mathematics. Over the last ...
    ... September 2015, Belgrade, Serbia DEVELOPMENT OF OPEN EDUCATIONAL RESOURCE (OER) FOR NATURAL LANGUAGE PROCESSING CVETANA KRSTEV University of Belgrade, Faculty of Philology, cvetana@poincare.matf.bg.ac.rs BILJANA LAZIĆ University of Belgrade, Faculty of Mining and Geology, biljana.lazic@rgf.bg.ac ...

  • 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

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... and general lack of readiness for the use of modern information technology. Consequently, the Ministry of Natural Resources and Environment Protec- tion, now the Ministry of Mining and Energy of the Republic of Serbia, launched in 2004 the project of the Geological Information System of Serbia, which has ...
    ... occurs in the Abstract field. The ranking of results is performed in descending order according to the total sum of the product of weight factors and the number of occurrences of the corresponding keywords. A specific feature of Serbian is the common use of two alphabets: Cyrillic and Latin, so a user ...
    ... basis of weight factors assigned to individual fields in the function of search criteria. Given the information available in the database, it is possible to add criteria and fine-tune the ranking output based on the number of occurrences of a keyword or phrase and the sum of the weight factors of the search ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... regression coefficients of the observed mathematical models for MICP kinetics, which explain the trends of the investigated process. The fit between experimental measurements and model calculated results, as well as the residual analysis of the developed model in which the quality of the model fit was tested ...
    ... Institute, University of Novi Sad, Serbia, for the use of measurement equipment. We would like to pay our gratitude and respect to our colleague Predrag Vulić who passed away in April 2020. His dedication and expertise were crucial to the quality of our scientific work. Conflicts of Interest: The authors ...
    ... might be concluded that MALDI-TOF identification has a better quality of base for the identification of non-clinical isolates than the VITEK2 Compact System. For this reason, but also since the obtained identification by the MALDI-TOF system had mostly high identification scores, MALDI-TOF results were ...

  • Numerical modelling of the roughly simultaneous emplacement of two distinct ophiolite belts

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • Towards a Mining Equipment Ontology

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... n system itself is a result of several phases of software development during the long-term research of the problem of coal quality management. The first versions of the software related to the problem of coal homogenization was developed in 1998, whereas the essence of the SUKU system as it is now ...
    ... contains a template of the classes used for different types of data search, domain control, selection of domain elements, and implementation of hierarchical data structures in the form of trees. The business logic of the system is implemented in four libraries, two of which are of a general type, and ...
    ... Serbian as one of the languages) in the area of mining engineering was initiated several years ago. One of the first taxonomies in this field was developed at the University of Belgrade Faculty of Mining and Geology (FMG), for bucket wheel excavators, within a project aimed at assessment of excavator ...

  • Using Lexical Resources for Irony and Sarcasm Classification

    Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković (2017)
    The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...
    ... were F1 = 73% for detection of ironic examples and F1 = 93% for detection of non-ironic examples of comparisons. 3 CORPUS OF IRONY One of the first challenges one encounters while trying to solve tasks of automatic recognition of verbal irony is selection of the col- lection of texts andmarking ironic ...
    ... without diacritics (s instead of š, c instead of č or ć, z instead of ž and d or dj instead of đ ), usage of transcribed words instead of words in the BCMS languages, e.g. hepi for happy, and the repetition of some letters for emphasis, e.g. saaad instead of sad ‘now’. The tweet a saaad, sredjivanje sobee ...
    ... Cvetana Krstev University of Belgrade, Faculty of Philology Belgrade, Serbia cvetana@matf.bg.ac.rs Jelena Mitrović University of Passau, Faculty of Computer Science and Mathematics Passau, Germany jelena.mitrovic@uni-passau.de Ranka Stanković University of Belgrade, Faculty of Mining and Geology Belgrade ...

  • Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia

    Dragoljub Bajić, Dušan Polomčić (2014)
    A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...
    groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables
    ... POLOMČIĆ, D. & BAJIĆ, D. 2014. Application of hydrody- namic predictive modeling on the example of the pump- ing station “Bezdan 1”. Tehnika, 65 (6): 956–962 (in Serbian, English summary). SINGH A.P., GHOSH S.K., SHARMA P. (2007). Water quality management of a stretch of river Yamuna: aninteractive fuzzy m ...
    ... is increasingly used in all fields of science, including hydrogeology - groun- dwater management, water quality management, dewatering and groundwater control, etc. (AZARNI- VAND et al. 2004; SINGH et al. 2007; UDDAMERI et al. 2014; KARNIB 2014 ). One branch of fuzzy logic applied in hydrogeology is ...
    ... decembar 2014 BELGRADE, December 2014 1 University of Belgrade, Faculty of Mining and Geology, Department of Hydrogeology, Djusina 7, 11000 Belgrade, Serbia, e-mail: osljane@orion.rs 2 University of Belgrade, Faculty of Mining and Geology, Department of Hydrogeology, Djusina 7, 11000 Belgrade, Serbia, ...

  • 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