Претрага
449 items
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Production information system of the Pljevlja coal mine
Božo Kolonja, Ranka Stanković, Filip Vuković . "Production information system of the Pljevlja coal mine" in Mine Planning and Equipment Selection 2000, Routledge (2018). https://doi.org/10.1201/9780203747124-154
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A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area
Filip Anđelković, Dejan Radivojević (2018)... 1989b). MATERIAL AND METHODS The fieldwork that had been carried out in the Belgrade area studied two facies: Tašmajdan limestones (so called „Leitherkalk“ (Gruber, 1988) or „Leitha limestones“) and Rakovica clastic sedi‐ ments (sands and conglomerates). There are two add ...Filip Anđelković, Dejan Radivojević. "A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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English for Geology Students. 2
Lidija Beko (2023)... students 1. Realizing that some teachers may prefer to structure their courses differently, we have made it such a way that each chapter is independent, so that they could be taught even in a differ- ent order that the one offered in the book. Therefore, teachers can combine the previous textbook with ...Lidija Beko. English for Geology Students. 2, Belgrade : The Faculty of Mining and Geology, 2023
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English for Geology Students. 1
Lidija Beko (2023)... was only accessible due to the pumping equipment used by the mining company. In 2015, the Cave was allowed to flood when mining operations cease and so the crystals may once again begin to grow! ___ Using the web pages below, and any others you can find, write a description of how selenite crystals ...Lidija Beko. English for Geology Students. 1, Belgrade : The Faculty of Mining and Geology, 2023
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Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector
To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatoriBoban Pavlović, Dejan Ivezić, Marija Živković. "Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector" in Energy Policy, Elsevier BV (2020). https://doi.org/10.1016/j.enpol.2020.111936
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Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia
Оливера Крунић (2021)Оливера Крунић. "Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia" in Рационално коришћење земљишта и вода у Србији - Sustainable Use of Land and Water in Serbia- Serbian Academy of Sciences and Arts; Scientific Conferences Volume CXCVII; Department of Chemical and Biological Sciences, Book 19, Српска академија наука и уметности (2021)
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Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera
Aleksandra B. Kolarski (2016-08-25)Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave... and climate change. J. Atmos. Sol.-Terr. Phys., 62, pp.1563-1576. São Sabbas, F. T., Sentman, D. D., Wescott, E. M., Jr., Pinto, O. P., Jr., Mendes, O., Taylor, M. J. (2003). Statistical analysis of space time relationships between sprites and lightning. J. Atmos. Sol.-Terr. Phys., 65, pp. 525–535 ...
... n After Solar X- Flares Occurrence, Therm. Sci., 9, pp. 299-309. Baker, D. N. (2000). Effects of the Sun on the Earth’s environment. J. Atmos. Sol.-Terr. Phys., 62, pp. 1669-1681. Barrington-Leigh, C. P., Inan, U. S., Stanley, M. (2001). Identification of sprites and elves with intensified video ...
... Rycroft, M. J. (2001). Non-uniform ionisation of the upper atmosphere due to the electromagnetic pulse from a horizontal lightning discharge. J. Atmos. Sol.-Terr. Phys., 63, pp. 559–580. Cohen, M., Cotts, B. (2009). Lightning Activity. IHY Workshop on Advancing VLF through the Global AWESOME Network ...Aleksandra B. Kolarski. "Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)
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Mineral Resources of Serbia: Environmental, Societal and Economic Challenges
... (Chiari et al. 2011 and references therein). The oceanic-derived units consist of a sub-ophiolite melange overthrust by ophiolites with a metamorphic sole at its base. Metamorphic Adria- derived units of the Jadar-Kopaonik-Studenica areas are exposed below the oceanic-derived units (Zelic et al. 2010) ...
... country. Naftna Industrija Srbije a.d. (NIS), which was a joint venture between JSC Gazprom Neft of Russia (56.15%) and the government (29.87%), was the sole producer of natural gas, petroleum, and refined petroleum products in Serbia. Lead and zinc production was produced by private companies Farmakom ...
... damages resulting, in whole or in part, from the rcaders” use of, or reliance upon, this material. Any parts of this book based on government reports are so indicated and copyright is claimed for those parts to the extent applicable to compilations of such works. Independent verification should be sought ...Vladimir Simić, Rade Jelenković, Dragana Životić. "Mineral Resources of Serbia: Environmental, Societal and Economic Challenges" in Serbia: Current Issues and Challenges in the Areas of Natural Resources, Agriculture and Environment,, Nova Science Publishers, Inc. (2019)
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Речник САНУ као база терминолошких речника (на примеру речника кулинарства)
... фразеолошке јединице које садрже ову лексику, а које, такође, бележи Речник САНУ (прост као пасуљ, прогутати кнедлу, бити у свакој чорби мирођија, солити памет). Формирње синонимских низова – дулечара, бундевара, тиквењак, дулечњек..., па качамак, палента, пура, мамаљуга, макарон, жгањци. 7 У Речнику ...
... +Prod производ брашно, ванилин шећер, марципан, џем, чоколада +Course готово јело савијача, куглоф, пире, десерт, качамак, сарма +Ing додатак со, лимунтус, конзерванс, каротен, заслађивач +Meal оброк предјело, роштиљ, закуска, ручак, пикник, чај, гозба +MesApp приближна мера прстохват, кесица ...Рада Стијовић, Олга Сабо, Ранка Станковић. "Речник САНУ као база терминолошких речника (на примеру речника кулинарства)" in Словенска терминологија данас, Београд : Српска академија наука и уметности (2017)
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Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support
Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović. "Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support" in Journal of Vibroengineering (2017). https://doi.org/10.21595/jve.2016.17321
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Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...... that sanidine and quartz predominate in D. The strength parameters of the rock material are affected mainly by the content and size of quartz crystals. So, as the content of smaller quartz particles increases, the compressive strength increases. In the AD sample, the process of quartz resorption is pronounced ...
... study includes laboratory UCS and triaxial tests of the composite specimens consisting of dacite and altered dacite, which have not been investigated so far. In previous studies, to make the composite specimens test results comparable, the intact UCS of each composite specimen (σci UCS) were normalized ...
... given by Marinos and Hoek [9], and Marinos [10] (Figure 17). Therefore, applying both of these practical methods for constant mi estimation is justified, so in this way, one can obtain a realistic estimation of the heterogeneous intact rock mass constant mi. The constant mi determined using the procedure ...Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović. "Determination of Mechanical Properties of Altered Dacite by Laboratory Methods" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11080813
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Uniaxial compressive strength test before and after standard fire test on rock mass
Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)... approximately equal. Testing uniaxial compressive strength of samples (7-12) after standard fire test was not possible because samples cracked so much that they disintegrated even before application of force on the hydraulic press. In Figure 5 samples after standard fire test are shown. ...Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović. "Uniaxial compressive strength test before and after standard fire test on rock mass" in Fifth symposium of the Macedonian Association for Geotechnics, Ohrid, North Macedonia, 23-25. 06. 2022, Macedonian Association for Geotechnics (2022)
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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
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Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs
Saša Milanović, Ljiljana Vasić (2021)Saša Milanović, Ljiljana Vasić. "Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs" in Hydrogeology Journal, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10040-020-02280-1
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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... spatula. The mixture was wetted with electrolyte solu- tion and stirred again. 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 ...
... "C. Three samples of each char were also analysed for 23 other elements by Inductive Coupled Plasma Optical Emission Spectroscopy (ICP-OES). To do so, 50 mg of sample were mixed with 0.25 g of LiBOx and heated within 3 h to 1000 'C in a muffle furnace. The decomposition was per- formed for 30 min ...
... (1.4%) and in addition aluminium (0.91%), sulfur (0.72%) and iron (0.13%). This can be expected for chars made from lignite or peat. Silicon is [ so present in most of the other chars with more than 0.1%. Most of the other additional elements of Table 3 are only present as traces in most of the ...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
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Automatic construction of a morphological dictionary of multi-word units
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, multiwordn units, noun phrases, query expansion... of a hyphen, and in these cases the strategy offers a very similar class. There are also some classes that are related to only one very specific MWU, so we have not even tried to formulate a rule for them, e.g. the class nc 2xn3xn1 for Sao Tome i Principe. However, all super-classes are covered by rules ...
... to process in a few months. One impor- tant thing that remains to be done is the addition of semantic and/or domain markers to MWU lemmas, which have so far been systematically added only for proper names following the approach suggested in [14]. We are considering several solutions, including one proposed ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Duško Vitas, Miloš Utvić. "Automatic construction of a morphological dictionary of multi-word units" in Lecture Notes in Computer Science 6233, Advances in Natural Language Processing, Proceedings of the 7thInternational Conference on NLP, IceTAL 2010, Reykjavik, Iceland, August 2010, Springer (2010): 226-237. https://doi.org/10.1007/978-3-642-14770-8_26
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A hundred years of Milutin Milanković's climate change theory - geological implications
Dejan Radivojević (2020)Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт... life conditions of the biosphere which could be potentially preserved within the sedi mentary record. Except them, there are also longer period cy- cles so-called “grand cycles” of 400 kyr, and 1.25, 2.35 and 4.6 my (oLSEN, 2001). The effects of these longer period cycles are only potentially noticeable ...
... attached to Serbia, where he de- cided to settle down despite much better financial conditions he had in Austria. His determination and love for science was so strong that he managed to achieve important discoveries during challenging times, in the course of two World Wars, and he repre- sents a great role ...Dejan Radivojević. "A hundred years of Milutin Milanković's climate change theory - geological implications" in Geološki anali Balkanskoga Poluostrva, Univerzitet u Beogradu, Rudarsko geološki fakultet (2020). https://doi.org/10.2298/GABP201125011R
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Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions
Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák. "Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions" in Journal of Solid State Chemistry, Elsevier BV (2015). https://doi.org/10.1016/j.jssc.2015.06.027
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Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria
The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijumaVladimir Krivošić, Luka Crnogorac, Rade Tokalić. "Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria" in Underground mining engineering, University of Belgrade - Faculty of Mining and Geology (2024)
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Coupling of artificial intelligence methods in the development of hybrid intelligent systems
In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije... algorithms mimic the natural evolution process. Namely, they optimize a “population” through several “generations” by changing adaptable parameters so that the population fits best an accepted criterion function. Thus, the initial weights of the NN were determined by the genetic algorithm on basis ...Ranka Stanković, Ivan Obradović, Nikola Lilić. "Coupling of artificial intelligence methods in the development of hybrid intelligent systems" in X Kongres Matematičara, Matematički fakultet, Beograd (2001)