Претрага
2599 items
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Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry
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 revitalizationSteven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti. "Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945979
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Classification of some significant occurences and mineral, thermal, and thermomineral water deposits of Bosnia and Herzegovina according to V.V. Ivanov classification
Krunić Olivera, Jovanović Tomislav, Sorajić Stanko, Dokmanović Petar. "Classification of some significant occurences and mineral, thermal, and thermomineral water deposits of Bosnia and Herzegovina according to V.V. Ivanov classification" in Journal of society for development of teaching and business processes in new net environment in B&H TTM 4, Sarajevo:EBSCO Publishing (2011): 1040-1052
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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757
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Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)
Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić. "Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)" in Palaeoworld, Elsevier BV (2019). https://doi.org/10.1016/j.palwor.2019.05.001
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The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje
In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...... development. The utilization of other renewable sources of energy, such as wind, solar, and geothermal, is marginal (Lewis M., 2018). The estimated potential can have a considerable contribution to the lesser utilization of fossil fuels, as well as the improvement of the environment. The biomass ...
... Data — the product of the Vvisual interpretation of high-resolution satellite imagery (Copernicus land Monitoring Service, 2019a). Corine means “coordination of information on the environment” and it is a prototype project working on many different environmental issues. As described on the website ...
... June - the 220 of December), i.e. between the period when the Sun reaches the highest and lowest point in the sky above the horizon. Unlike the direct solar radiation, which totally depends on the position and distance of 329 a given area/point relative to the Sun, the diffuse solar radiation ...Boban Pavlović, Milica Pešić-Georgiadis. "The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje" in 12th International Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece, Energy Policy and Development Centre (KEPA) of the National and Kapodistrian University of Athens (2019)
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Production of morphological dictionaries of multi-word units using a multipurpose tool
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion... itself. In the pattern <$3:Gen==$g> the variable $g inherits its value from the third token zvezda and instantiates only to the value f — the feminine gender. The variable $g from the pattern <$1:Gen=$g> occurring in the same path will thus have to agree with it and take the same value. The two possible ...
... > appears in the same path as <$3:Case=$c> it means that when the genitive form of the first token is generated then the genitive form of the third token has to be generated as well, and that will also be the value of the ‘Case’ feature of the generated MWU form — the output of the transducer. ...
... possible orders of the adjective and the noun in the MWU are achieved with two separate paths in the graph, one for the order given by a lemma itself, and the other for the reverse order. The orthographic variants of MWUs, e.g. the optional use of a hyphen, as well as omission of some of its constituents ...Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas. "Production of morphological dictionaries of multi-word units using a multipurpose tool" in Proceedings of the Computational Linguistics-Applications Conference, October 2011, Jachranka, Poland, Jachranka, Poland : PTI - Polish Information Processing Society (2011)
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Classification of Neolithic Ceramics and Clays According to Their Morphological Characteristics
Gajić Kvaščev Maja, Svoboda V., Jančić-Heinemann R., Dimitrijević M., Milovanović Dragan, Polić Radovanović Suzana (2012)Gajić Kvaščev Maja, Svoboda V., Jančić-Heinemann R., Dimitrijević M., Milovanović Dragan, Polić Radovanović Suzana. "Classification of Neolithic Ceramics and Clays According to Their Morphological Characteristics" in Mediterraneum Meeting Use of Multivariate Analysis and Chemometrics in Cultural Heritage and Environment-CMA4CH 2012, Rome, Italy:Rome University, La Sapienza (2012)
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Дигиталне библиотеке у рударству и геологији са посебним освртом на представљање сиве литературе
Имајући у виду потребу за проналажењем информација похрањених у различитим облицима документације која се генерише у областима рударства и геологије на Рударско-геолошком факултету Универзитета у Београду, отпочет је процес развоја дигиталне библиотеке ROmeka@RGF, на платформи за приказивање дигиталних колекција - Омека. Значајан део документације представља такозвана сива литература која је претежно заступљена у виду вишетомне документацијe. Први савладани изазов представљало је повезивање различитих вишетомних делова пројектних извештаја у једну целину која би била лако доступна и претражива.... documentation generated during the multidisciplinary projects. There is recognized significance of real-time and appropriate access to the project data. It is common that projects are stopped due to information lose in long-time period and unstable environment. The first challenge is to connect different ...
... e parts in one consistent unit that is easily accessible and searchable. One more challenge is the nature of the project documentation which is the mixture of textual, numerical, graphical and cartographical contents. In order to solve the above-mentioned problems we used a platform for digital objects ...
... Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital 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 149 БИБЛИОИНФО ...Биљана Лазић, Александра Томашевић, Михаило Шкорић. "Дигиталне библиотеке у рударству и геологији са посебним освртом на представљање сиве литературе" in Научна конференција Библиоинфо — 55 година од покретања наставе библиотекарства на високошколском нивоу, Београд 18. мај 2017., Филолошки факултет Универзитета у Београду (2019). https://doi.org/10.18485/biblioinfo.2017.ch13
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Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeLjiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu. "Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08910-x
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Softverski alati za korišćenje resursa za srpski jezik
Ivan Obradović, Ranka Stanković (2008)... Intex/Unitex environment therepre- sents all inflectional forms of the word kucxa – it is presumed that kucxa is a lemma in the DELAS dictionary, with all its inflectional forms gener- ated in the DELAF dictionary. Figure 7. Generating a graph for a synset and its hypernyms 3.4 Aligned texts ...
... with the possibility of adding hypernym literals. The left side of Figure 7 depicts a WS4LR panel where the textual form of the graph for the syn- set {kuća:6, dom:3} is generated, together with its hypernyms, whereas the right side depicts the graph generated in the Intex environment. In the In ...
... (for the time being only the update and search of SWN is envisaged), and also offer information of the Human Language Technology Group and the developed software for lexical re- sources, namely WS4LR and WS4QE. Figure 10. The main menu of the WS4QE web application The motivation for the development ...Ivan Obradović, Ranka Stanković. "Softverski alati za korišćenje resursa za srpski jezik" in INFOteka: časopis za informatiku i bibliotekarstvo, Belgrade, Serbia : Zajednica biblioteka univerziteta u Srbiji (2008)
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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... symposium Engineering geology and Environment, 3, 3263–3268, Greece, Athens,. JEVREMOVIĆ D., ILIĆ M., REGOJE M., 1998: Ornamental stones and their pro- duction in Yugoslavia. VIII Congress of the International Association of Engine- ering Geology and the Environment, Vancouver, 2957–2961, Canada ...
... 2012: Onset and demise of the Wetterstein Carbonate Platform in the mélange areas of the Zlatibor Mountain (Sirogojno, SW Serbia). Facies, 58 (1), 95–101. SUDAR M.N., GAWLICK H.-J., LEIN R., MISSONI S., KOVÁCS S.†, JOVANOVIĆ D., 2013: Depositional environment, age and facies of the Middle Triassic ...
... composition of the airborne particles in the coal dust and fly ash of the Kolubara basin (Serbia), Periodico di Mineralogia : An International Journal of Mineralogy, Crystallo- graphy, Geochemistry, Ore Deposits, Petrology, Volcanology and applied topics on Environment, Archeometry and Cultural Heritage ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...... member of the Slanci Series (?Lower Miocene, Egenburgian) and they represent the regressive phase and termination of the lacustrine environment in this area. More recent research has determined the presence of these clas- tites in the vicinity of Torlak Hill and in the upper part of the Rakovica Stream ...
... Unpubl. PhD Thesis, Faculty of Mining and Geology, University of Belgrade, 162 p. TOLJIĆ, M. (2016): Tectonic evolution of the European margin and Neotethys suture zone in the region of Belgrade (Northern Šumadija-Serbia).– Wseas Transactions on Environment and Development, 12, 268‒277. TOLJIĆ, M ...
... 1997, Figure 12. The contact between the blueish-gray serpentinites in the basal part of the section (1) and the Pleistocene delluvial-prolluvial clastites (2) and slope loess sediments (3), and the Holocene delluvial-prolluvial clastites (4) and recent soil at the top of the section (5). G eo ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept
Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov. " Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept" in Engineering Geology , Elsevier (2019). https://doi.org/10.1016/j.enggeo.2019.05.007
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Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete
Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija... ls Minerals 2021, 11, 925 2 of 16 and slag are usually rich in different heavy metals and because of this, they can be harmful for the environment and human health, and consequently may be classified as hazardous waste [8]. The high amounts of produced and consumed lignite generate large quantities ...
... impact on the environment, and because of that, it is particularly important to find a way for its safe storage and disposal. Finding the useful value of such generated waste as cement replacement in the construction industry is certainly a step in the right direction. However, concerning the application ...
... variation in length and the initial length of the specimen at the start of testing. The difference in readings represented the variation in length of the tested sample, while shrinkage of the cement mortar was expressed as the ratio of length variation and the initial length of the sample at the start of testing ...Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović . "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete" in Minerals, MDPI (2021). https://doi.org/10.3390/min11090925
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Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation
The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...... maps and values of damage indices from 2007 and 2014, the eastern part of the gate was separated as the zone of the monument that had suffered the heaviest damage. Differ- ences among the values of damage indices showed that the position of the gate is one of the main causes of the present ...
... looking at the weath- ering maps, as well as at damage category, is that the half of the gate oriented to the cast is more damaged then the half oriented to the west (Fig. 5 and Table 3). This could be explained by the gate position inside of the fortification; the gate is leaning on the slope which ...
... weathering at Maltese Globigerina limestones. In: Zezza F (ed) Proceedings of the E.C. research workshop *Origin, mechanisms and effects of salts on degradation of monuments in marine and continental environment”Bari: C.U.M. University school of monument conservation, p 333344 Fitzner B, Heinrichs ...Maja Franković, Nevenka Novaković, Vesna Matović. "Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation" in Environmental Earth Sciences, Springer Science and Business Media LLC (2015). https://doi.org/10.1007/s12665-014-3843-z
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Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine
Lazar M. Kaluđerović (2018-01-17)fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon... management and irrigation techniques: preliminary results. International Journal of Energy and Environment, 9: 237–241. Permien T., Lagaly G. 1994. The rheological and colloidal properties of bentonite dispersions in the presence of organic compounds III. The effect of alcohol on the coagulation ...
... Definition of clay and clay mineral: Joint report of the AIPEA nomenclature and CMS nomenclature committees. Clays and Clay Minerals, 43(2): 255–256. Gunasekara A. S, de la Cruz I. D. P., Curtis M. J., Claassen V. P., Tjeerdema R. S. 2009.The behavior of clomazone in the soil environment. Pest Management ...
... pollutants. The Science of the Total Environment, 141: 223–240. Kozak J., Valla M., Prokopec O., Vacek O. 1992. Prediction of the role of soil organic matter and some other soil characteristics in herbicide adsorption. In: Kubat, J. (Eds.), Humus, Its Structure and Role in Agriculture and Environment ...Lazar M. Kaluđerović. "Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-01-17)
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Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке
... links the field (magnetic or gravitational) and its gradients along the directions (x, y and z) with the source position by the degree of homogeneity (N). The degree of homo‐ geneity is the measure of the decrease of the intensity of the magnetic field with the distance from the source of the anomaly ...
... is non‐destructive, and with the increase in speed and measurement resolution, the costs of the investigation and excavation have decreased consi‐ derably. The use of magnetic measurements in archaeological prospecting allows to obtain the data on 739 the size of the site and the approximate p ...
... inclination, declination and remanent magnetization (Bastani & Kero, 2004). A model of a prism of definite thickness which lies on shallower and deeper depth was considered, as well as the model on which are shown several bodies at different depths, in an environment with different magnetic s ...Весна Цветков, Илија Васиљевић, Бранислав Сретеновић, Весна Дамњановић. "Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке" in Књига апстраката 17. Конгрес геолога Србије, Врњачка Бања 17-20. мај, Српско геолошко друштво (2018)
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FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina
... due to the migration into groundwater (Cohen et al., 1986). The reduced inhibitory activity requires repetition of treatment, which leads to increased costs and a negative impact on the environment. Therefore, attempts were made to create a formulation that would lead to an improvement in the inhibitory ...
... oxygen of methoxy and ethoxy group are in resonance with the lone pair on nitrogen and the double C=O bond, which delocalizes the charge distribution and reduces the charge density on the carbonyl oxygen (Liu et al., 2000). The second significant change after the S-metolachlor sorption was detected on ...
... PTMA-montmorillonite takes place through the 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 ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina" in Book of Proceedings / 3rd International and 15th National Congress Soils for Future Under Global Challenges, 21-24 September 2021 Sokobanja, Serbia , Belgrade : Serbian Society of Soil Science (2021)
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Energetska efikasnost elektromotora na površinskim kopovima
Snežana Aleksandrović, Ilija Jeftenić (2023)Snežana Aleksandrović, Ilija Jeftenić. "Energetska efikasnost elektromotora na površinskim kopovima" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023. , Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Hidraulički tranzijenti u karstnoj sredini tokom rada hidroelektrane
Maja Todorović, Marina Ćuk Đurović, Igor Jemcov. "Hidraulički tranzijenti u karstnoj sredini tokom rada hidroelektrane" in Knjiga apstrakata 10. Simpozijuma o zaštiti karsta, Zlatibor, 14-15. oktobar 2023., Beograd : Akademski speleološko–alpinistički klub (ASAK) (2023)