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Упит dcterms_creator_txt:Christof Schöch and Mihailo Škorić

2351 items

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • The Nooj System as Module within an Integrated Language Processing Environment

    Ranka Stanković, Duško Vitas, Cvetana Krstev (2008)
    NooJ, electronic dictionary, lexical resources
    ... Mathematics, University of Belgrade, and is aimed at manipulating heterogeneous lexical resources developed in the course of many years and within different projects. The tool handles morphological dictionaries, wordnets, aligned texts and transducers and has already proved very useful for various ...
    ... years, and it is understandable that they have been conceived within different projects and frameworks, both from the conceptual and the technological perspective. Despite that the HLT group made every reasonable effort to keep the constantly growing pool of resources as coherent and standardized ...
    ... their presentation and usage This software tool is developed in C# and operates on the .NET platform. An important feature of WS4LR is its flexibility expressed both by the possibility of setting environment parameters and by the possibility of invoking command-line routines and using external Perl ...

  • An Approach to Development of Bilingual Lexical Resources

    Stanković Ranka, Obradović Ivan, Trtovac Aleksandra (2012)
    ... lexical resources, we had at our disposal Serbian morphological e-dictionaries [Krstev, 2008], Serbian and English wordnets (SrpWN and EWN), and a bilingual Serbian-English Dictionary of Library and Information Science technology (further referred to as Dictionary of Librarianship) [Kovačević et ...
    ... the system of rules for compound inflection, finite automata and transducers, represent the basis for morphological expansion of queries. As for semantic and bilingual expansion, the system relies on Serbian and English wordnets and the bilingual dictionary of Librarianship. The user formulates ...
    ... exist in the database and if not, enters the missing terms in the database and generates the new synset. The next step, establishing a relation between a synset and its counterpart in another language, is simply realized by selecting the pair of synsets to be related, and then clicking on the ...

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... are petokrak.A6 and zvezda.N600, and for Farenhajtov stepen they are Farenhajtov.A1 and stepen.N5. 5. What are the values of grammatical features of constituent forms used in the MWU lemma? For the first example they are aefs1g and fs1q, while for the second they are akms1g and ms1q. A fully manual ...
    ... that it enables inflection of simple words, MWUs and free phrases supplied as key- words to Google. The tool relies on Serbian e-dictionaries, inflection transducers for simple words and MWUs, and uses Unitex and Multiflex modules for inflection and dictionary look-up. As for the free phrases that ...
    ... the natural order of an adjective and a noun in a MWU. However, these MWUs, together with a few more allow a reverse order as well — zvezda petokraka and stepen Farenhajtov. Both MWUs can be used in plural form. In Serbian, adjectives and nouns inflect in number and case, while adjective forms also ...

  • Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

    Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)
    Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... ‘A’ and 30% to grade ‘B’. For indicator M he assigned 40% to grade ‘A’ and 60% to grade ‘B’, while for indicator S, he assigned to grades ‘A’ and ‘B’ 30% to 70%, respectively. The other five machines were also evaluated following the same methodology, and the results are shown in Tables 4 and 5. ...
    ... methodology, M.T. and I.J.; validation, D.I. and T.S.; formal analysis and writing—original draft preparation S.D. Funding: This research and the APC was funded by Ministry of Education and Science of the Republic of Serbia within the framework of Programme of research in the field of technological d ...
    ... of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the coefficient of time ...

  • An oilfield in Libya: A new model to enhance waste water disposal

    Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković (2016)
    нафта, лежишне воде, припрема

  • On the compatibility of lexical resources for NooJ

    Ranka Stanković, Miloš Utvić, Duško Vitas, Cvetana Krstev, Ivan Obradović (2012)
    Lexical resources for many languages are provided for the NooJ linguistic development environment. Meta-data descriptions of morphosyntactic and semantic properties of these languages and their resources are a mandatory part of each language module. In this paper we analyze how well the meta-data actually describe resources for a chosen subset of languages and to what extent are they compatible across languages to support multilingual processing. We show that there is place for improvement in both directions.
    ... values: singular, plural, dual, count, and collective. For English, Polish, Croatian and Hungarian, only singular and plural are applicable, while Serbian and Bulgarian also use count. In Serbian this number corresponds to paucal (a small number – 2, 3 and 4). However, the collective category ...
    ... category is not totally inapplicable, and is thus coded with the tags +Coll and +HumColl in Serbian and +ConcColl and +CollHum in Polish (see Table 2). According to the same table the Bulgarian NooJ resources do not recognize values other than singular and plural. Finally all observed languages, except ...
    ... compatibility and standardization. The paper ends with concluding remarks. Comparison of annotation systems Morphological, syntactic and semantic information in NooJ resources is represented by codes or tags, pertaining to morpho-syntactic and semantic categories, their properties and the features ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... decisions about coal homogenization must deal with uncertainty and variability in coal properties, and with the effect of off-design coal characteristics on power plant performance and cost. According to Shih and Frey [3] sulfur and ash content and heating value are considered as normally distributed random ...
    ... developed and consists of three sub-models: operational mine scheduling model, stocking model and reclaiming model, fig. 5. According simulated daily or shift mine plan each BWE has working bench position and pro- duction parameters. Mass and quality control will be done by on-line devices and weightmeters ...
    ... meeting the requirements of physical and geological constraints, policies and mining methods. The basic data required in any operational planning are coal quality and capacity. Difficulties in optimum production schedule are caused by variability of grade and inability to accurately predict grades ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević (2017)
    ... Neogene of Central and South-Eastern Europe 57 58 7th International Workshop | Neogene of Central and South-Eastern Europe data are obtained from the previously known stratigraphic units (Pannonian and Pontian, sensu Stevanović). Based on litho- and biostratigraphic analysis and measurement of ...
    ... current state and perspectives, GIN RAS, 356–359. STUDENCKA, B. & JASINOWSKI, M. (2011): Bivalves from the Middle Miocene reefs of Poland and Ukraine: a new approach to Badenian/Sarmatian boundary in the Paratethys. Acta Geologica Polonica, 61, 79–114. MIO-PLIOCENE GEODYNAMICS AND ITS STRATIGRAPHIC ...
    ... Belgrade, Faculty of Mining and Geology, Department of Regional geology, Kamenička 6, 11000 Belgrade, Serbia *corresponding author: ljupko.rundic@rgf.bg.ac.rs In recent years, thanks to numerous infrastructural works and construction of the local roads, new outcrops and sections near Avala Mt. have ...

  • Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma

    Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković (2013)
    ... 17 Pellegriti et al,27 and Ito et al28 found a similar prevalence of multifocal tumor foci and lymph node metastases (12.1% and 13.4%, 31.8% and 30.1%, and 42.8% and 47.9%, respec- tively). Ito et al reported more than 40% of patients who presented with lymph node metastases and multiple tumor foci.2 ...
    ... was 97.7% T 1.3% after 5 and 10 years; the probability of disease-specific survival was 95.9% T 2.2% after 15, 20, 25, and 28 years after the initial treatment and was significantly influenced by recurrence, clinical stage, and patients’ age (P = 0.0001, P = 0.0005, and P = 0.02, respectively). Sex ...
    ... their risk of relapse and cancer-specific mortality is higher than in low-risk patients.23,24 The aim of this study was to retrospectively evaluate influence of surgery and RAI therapy as an initial treatment, on the recurrence and survival of patients with DTM. PATIENTS AND METHODS Patients A r ...

  • Development of a petrographic classification system for organic particles affected by self-heating in coal waste. (An ICCP Classification System, Self-heating Working Group – Commission III)

    M. Misz-Kennan, J. Kus, D. Flores, C. Avila, Z. Büçkün, N. Choudhury, K. Christanis, J.P. Joubert, S. Kalaitzidis, A.I. Karayigit, M. Malecha, M. Marques, P. Martizzi, J.M.K. O'Keefe, W. Pickel, G. Predeanu, S. Pusz, J. Ribeiro, S. Rodrigues, A.K. Singh, I. Suárez-Ruiz, I. Sýkorová, N.J. Wagner, D. Životić (2020)
    Self-heating of coal waste is a major problem in the leading coal-producing and consuming countries, independent of the recent or past coal exploitation history. The phenomenon of self-heating is dependent on many factors such as the properties of organic matter (maceral composition and rank), moisture and pyrite content, climate effects, and storage conditions (shape of the dump or compaction of the coal waste). Once deposited, coal waste undergoes oxidation, which can lead to self- heating with the overall temperatures ...
    Stratigraphy,Economic Geology,Geology,Fuel Technology

  • Using English Baits to Catch Serbian Multi-Word Terminology

    Cvetana Krstev, Branislava Šandrih, Ranka Stanković (2018)
    In this paper we present the first results in bilingual terminology extraction. The hypothesis of our approach is that if for a source language domain terminology exists as well as a domain aligned corpus for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a ...
    aligned texts, word alignment, terminology extraction, electronic dictionaries, morphological inflection
    ... for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a tool for word and chunk alignment ...
    ... lemmatized and POS-tagged texts 2In this paper we will call ‘source’ language a well-resourced language (English), and ‘target’ language a less-resourced lan- guage (Serbian). 2487 (Bouamor et al., 2012; Vintar and Fišer, 2008), while oth- ers perform full semantic parsing (Moirón and Tiedemann, ...
    ... Dictionary of Library and Infor- mation Science (English/Serbian pairs); • The rule-based system for the extraction and lemmati- zation of potential terminological nominal phrases; • Bilingual Serbian/English list of inflected word forms and MWE pairs derived from bilingual dictionaries and morphological ...

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... facts and heuristics which can be represented by means of rules, frames, semantic networks and other formalisms. Since knowledge is the key factor in problem solution and decision making, the quality and usability of an expert system is basically determined by the accuracy and completeness ...
    ... developed at the Faculty of Mining and Geology of the University of Belgrade (Lilić, Stanković, and Obradović, 1994). This package, which enables the simulation of air flow distribution in a mine, the heat and fire transmission mechanisms, distribution of gas and distribution of respirable mineral ...
    ... KAPPA-PC Object Browser for VENTEX The classes and objects of the modified OOA model shown in /Fig. 1/ were transformed to classes and instances in the KAPPA-PC system. Thus the classes and object from /Fig. 1/ are represented by KAPPA-PC classes and instance as shown in the system’s object browser ...

  • Polyhedral characteristics of the cosalite-type crystal structures

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)
    kristalna struktura, kozalit, poliedarske karakteristike

  • Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction

    Velislava Stoykova, Ranka Stanković (2018)

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... Ko – safe and healthy work environment, Ky - extractable ore reserves, and K+ — coefficient of ore de- pletion. The considered mining: technology options, based on the natural setting, included: Ai — block caving, Ao — sublevel caving, A3 — cutting and filling, and Aa – room and pillar mining ...
    ... inherent uncertainties, vagueness, and inaccuracies. As a result, subjective evaluation by engineers and expert experience have become increas- ingly important. Given that the natural language used by miners and geologists is most suited for relaying: knowledge and expressing; opinions, the paper ...
    ... underlying: and overlying, limestones. The underlying limestones are solid homo- geneous rocks, with numerous fractures and a number of fault zones. Expert experience suggested potential problems for certain types of mining. operations. Additionally, also based on experience and the physical and mechanical ...

  • Petrographical and organic geochemical study of the subbituminous coal from the Dubrava field, Aleksinac basin (Serbia)

    Željana Sekulić, Ksenija Stojanović, Achim Bechtel, Reinhard Sachsenhofer, Miomir Petrović, Ivan Kojić, Dragana Životić (2019)
    ... parts of the Main coal seam and coal layers within and under lower oil shale package. Since vitrinite reflectance (%Rr, 0.44 + 0.03 - 0.46 + 0.02) and biomarker compositions indicate the same maturity stage of organic matter (OM), corresponding to late diagenesis and early catagenesis, petrographic ...
    ... n (С15-Сг0) and increase of long-chain (Cz6-Ca3) homologues. The obtained results suggest lowering of the water table during the formation of the Main coal seam. This change resulted in lesser inundation and deposition of MM associated with smaller input of bacterial and algal OM and higher contribution ...
    ... proxies and stable carbon isotope ratios (6'3) of individual biomarkers were used to evaluate the origin and depositional environment of OM. The content of vitrinite group macerals increases from top to bottom of the Main coal seam which is associated with a notable decrease of liptinite and mineral ...

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica