Претрага
321 items
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
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Centar za hidrogeologiju karsta - 15 godina nauke i struke
... successfully used for the first time in 2014. The gripper Was used several more times in wells with a diameter from 140 mm to 300 mm, and up to a depth of 100 meteTs. Research and monitoring of a spring discharge and flow (karst springs, springs, watercourses) In addition to research on hydrogeological ...
... the time in their dissertations. Učesnici i predavači na kursu CEKA 2019. godine u Feliks Romuliani Participants and lecturers of CEKA 2019 in Felix Romuliana n 2020, plans called for the CEKA course to be raised to a higher level, by adding another location. The course was supposed to be held ...
... decided to cancel the course and move it to 2021. Nevertheless, online classes from this course were offered to master's students of the Faculty of Mining and Geology since remote teaching was the only possible option. This effectively maintained the continuity of the course, even at a time of worldwide ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
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Numerical modeling of Selanac debris flow propagation using SPH code
The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...... calculation of erosion rate, i.e. time derivative of the ground surface elevation, which is supposed equal the product of velocity (v), propagation height (h) and “landslide grow rate” (Er). The latter is independent to the flow velocity and is related by Hungr (1995) to the initial and final landslide ...
... Tomography) profiles. According to geophysical ERT investigation, the highest depths of the deposits are about 20 m. Calculated final volume is about 495 000 m 3 while initial volume was computed to be 447 400 m 3 . The results of erosion depth at different time steps are given in Fig.4. ...
... LANDSLIDES. CARTAGENA, COLOMBIA- JUNE 15th-19th-2020 Figure 4 Erosion depths in meters in time steps A) 16 s B) 30 s C) 50 s D)100 s 5 CONCLUSIONS Final models show accurate results comparing to the depths in deposition zone (Krušić et al. 2019). The actual run-out distance of this debris ...Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi . "Numerical modeling of Selanac debris flow propagation using SPH code" in SCG-XIII International Symposium on Landslides. Cartagena, Colombia- February 22-26, 2021, International Society for Soil Mechanics And Geotechnical Engineering (2021)
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New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"
Saša Ivanišević, Dejan Radivojević (2018)геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија... raphic boundaries are given according to the traditional industrial interpretation. Maximum flooding surface (MFS), formation boundary (FB), transgressive surface (TS), highstand systems tract (HST), transgressive systems tract (TST), time transgressive formation top (TTFT), Banat ...
... As opposed to the approach applied in industrial research, the new approach to correlation of oil and gas reservoirs of the “Mokrin” field is presented through the correlation of strati‐ graphic units based on the interpretation of depositional environments executed according to the pri ...
... results in more correct assessment of hydrocarbon reserves. Furthermore, such an approach to interpretation of geological and geophysical data contributes to risk reduction in exploration, and also to the more efficient planning of reservoir development and production. ЛИТЕРАТУРА / ...Saša Ivanišević, Dejan Radivojević. "New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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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 ...... sediments, while to the south, the basement is composed of karstified middle Triassic limestones. In previous research, Simić, Milivojević and Martinović contributed significantly to the estimation and utilization of the geothermal resources of the wider area [3-5]. In relation to the aforementioned ...
... 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 ...
... with the results of resource drilling and geophysical survey to assess the geothermal potential of the basement of the Valjevo-Mionica Neogene basin. The study estimated the basin's depth and expected temperatures ranging from 40"C to 65"%C for the Triassic limestone reservoir. The applied approach ...Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić. "Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia" in Proceedings 9th International Conference mining and environmental protection, MEP23, Sokobanja, 24-27th May 2023, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)
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Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Building and Construction... depth, so in the well, the values vary from 4.3 to 7.45 mg/L, while the values in the thermal spring, are consistently low, ranging from 1.13 to 2.61 mg/L due to a prolonged residence time within the system. A slight increase in water turbidity up to a maximum of 1.74 NTU was recorded at the Krupaja ...
... tool for defining , the velocity of groundwater circulation and mean residence time is isotopic analysis, which is increasingly used, and, in correlation to field research, has the potential to contribute significantly to defining, the genesis of groundwater in karst systems. Groundwater genesis is ...
... of the results, thereby confirming that this water belongs to the same karst system. The results were associated with groundwater changes related to increases in the depths of the karst conduits and the mean residence time. In order to determine the age of the groundwater, radioactive isotopes ...Ljiljana Vasić, Saša Milanović, Tina Dašić. "Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)" in Sustainability, MDPI AG (2023). https://doi.org/10.3390/su151411146
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Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential
The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти... drinking fountains to complex resorts with variety of facilities (Figure 2). Since 20 out of 50 proposals refer to wellness and spa facilities, they have remained in the spotlight of further investigations. Throughout the process, a series of model units was developed and tailored to match medical and ...
... communities. 3.2.3. Passive Design Strategies Striving for high level of energy efficiency and climate-responsive design, a series of passive design strategies were proposed to support the overall design goals. Placement and orientation: Placement of all open-air features and enclosed spaces was done ...
... facilitates compatibility and provides a continuity of various treatments in different weather scenarios. This enables extended operation time, mitigating the sensitivity to seasonal or annual variations in climate while optimizing running costs. Most open-air features are rather small, following the general ...Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić. "Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential" in Applied Sciences-Basel, МDPI (2021). https://doi.org/10.3390/app11062691
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Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
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Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)... (a), HDPE (b) and lignite/HDPE mixture (c), representing absorbance with respect to time and wavenumber. A time of 20 minutes corresponds to a temperature of 227 oC, 40 minutes to 427 oC, 60 minutes to 627 oC, 80 minutes to 827 oC. The ramp rate was 10 oC/min. Polymers 2021, 13, 759 22 of 25 Author ...
... transform infrared spectroscopy (FTIR) thermogram of lignite/HDPE mixture with indicated peaks. A time of 20 min corresponds to a temperature of 227 ◦C, 40 min to 427 ◦C, 60 min to 627 ◦C, and 80 min to 827 ◦C. The ramp rate was 10 ◦C/min (full TGA-FTIR thermograms of lignite, HDPE, and lignite/HDPE ...
... rate of both the pyrolysis and the oxidation ovens was 25 ◦C/min. Pyrolysis was done in the temperature range from 300 to 650 ◦C, while oxidation was performed up to 850 ◦C. The total time for sample analysis was 90 min. The entire process was managed using the software “RockSix” (Vinci Technologies, Nanterre ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
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Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)
This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...... locations, where a series of bituminous limestones and marls was observed: Necvijeće, in the south (east of Trebinje), and Avtovac, in the north (east of Gacko). Samples are rep- resented by limestone and marl with carbonaceous organ- ic matter. Sample 5 was taken from the Lower to Middle Jurassic marls ...
... with organic-rich laminae. �e Eocene sedimentary rocks were sampled in the west, near Nevesinje (Kljen in the southeast), in a series consist- ing of brown and grey to dark grey, layered limestone banks, interbedded with carbonaceous marl. �e sample was taken from the carbonaceous marl. �e youngest ...
... locations, where a series of bituminous limestones and marls was observed: Necvije¢e, in the south (east of Trebinje), and Avtovac, in the north (east of Gacko). Samples are rep- resented by limestone and marl with carbonaceous organ- ic matter. Sample 5 was taken from the Lower to Middle Jurassic marls ...Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić. "Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)" in Annales Societatis Geologorum Poloniae (2021). https://doi.org/10.14241/asgp.2021.16
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Development of A Business Intelligence Tool For Accident Analysis in Mines
... doi>10.1016/j.eswa.2008.02.047 [3] Danihelka, P.: Safety and Security Research and its Relation to VŠB-TU Ostrava. Transactions of the VSB-Technical University of Ostrava Safety Engineering Series, 2012., Number 2, 2012., Volume VII, pp., 1-5, ISSN 1801-1764 (printed version) [4] Dhillon, BS: ...
... at the same time, lack of ontologies in mining industry, a methodological approach to development of a system of ontologies for Serbian mining industry has been undertaken (Stanković et al, 2012). This ontology system, Rudonto, is envisaged as a general resource, with the main goal to enable knowledge ...
... trends, and exception conditions. An OLAP session takes place online in real time, with rapid responses to manager’s or analyst’s queries, so that their analytical or decision-making process is undisturbed. Online analytical processing involves several basic analytical operations, including consolidation ...Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić. "Development of A Business Intelligence Tool For Accident Analysis in Mines" in Proceedings of the 5th International Symposium Mining And Environmental Protection, June 10-13, 2015, Vrdnik, Serbia, Belgrade : Faculty of Mining and Geology (2015)
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Palaeoflora of Kamenica (Pranjani Basin, western Serbia)
Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...... of Maljen and Suvobor, while the north side is framed by peridotit-serpentine massif. (ereMIja et al., 1977). according to the changes of lithological compo- sition it is possible to divide the Pranjani Basin into three horizons: The oldest horizon is located in the western part of the basin (the village ...
... 2007). a gravity anomaly map (Fig. 2) was compiled in order to check the correlation between the position of Neogene basins and the distribution of gravity anomalies. Neogene basins are filled with sediments of low density, in comparison to the density values of the basement and surrounding rocks. In ...
... Early Miocene floras in Serbia The palaeoflora of Kamenica has been compared to the Oligocene and Lower Miocene floras from the territory of Serbia. Palaeovegetation from Kamenica differs from other Oligocene floras due to the exis- tence in a wetter climate. The climatic conditions in the period when ...Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević . "Palaeoflora of Kamenica (Pranjani Basin, western Serbia)" in Geološki anali Balkanskog poluostrva, Beograd : Rudarsko-geološki fakultet (2019). https://doi.org/10.2298/GABP1902053L
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Using Lexical Resources for Irony and Sarcasm Classification
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) ...... #politics, #health, etc. as described in [2], [19]. On the other hand, it is possible to mark a single Twitter account as a collection of ironic tweets, provided that the contents of that account are known [2], [15]. In a series of papers,5 a collection of ironic tweets was 3In this and following examples ADJ ...
... the number of relations in a rule goes up to a maximum of all six relations. Restrictions that we introduce are the following: (1) a relation cannot be repeated more than once in a given rule; (2) the relation synonym can be found only as the first one in a series of given relations. That is how we have ...
... of [8]. Finally, a crowdsourcing method was used to gather ironic statements from product ratings shown on the Amazon site [13]. For research presented in this paper, we have generated a cor- pus of tweets based on online search with geolocation and time constraints, using the query: #ironija near:Belgrade ...Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković. "Using Lexical Resources for Irony and Sarcasm Classification" in Proceedings of the 8th Balkan Conference in Informatics (BCI '17), New York, NY, USA, : ACM (2017). https://doi.org/
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Actual contamination of the Danube and Sava rivers at Belgrade (2013)
Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening... Budapest, Bratislava and Belgrade) with 0.5 million to 2.5 million inha- bitants contributing to extensive water use and pollution. Many organic compounds have been identified in the Danube River, i.e., to date: hydrophobic alkylphenolic, lipid series (n-alkanoic acids, n-alkanes, n-alka- nols and sterols) ...
... rs/jscs/ 1174 ANTONIJEVIĆ et al. MS was operated in the electron impact ionization mode (EI+, 70 eV) scanning from 35 to 500 Da at a rate of 1 s dec-1 and an inter-scan time of 0.1 s. Identification of the organic compounds. The EI+-mass spectra were compared with spectra of reference compounds ...
... for imidacloprid 250 nm and for clothianidin 260 nm. The retention time for thiamethoxam was 5.7 min, for imidacloprid 8.5 min and for clothianidin 7.4 min. For quantification purposes, calibration curves in the range from 0.1 to 100 mg L-1 were prepared. The LOD value for all the analysed neonicotinoids ...Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer. "Actual contamination of the Danube and Sava rivers at Belgrade (2013)" in Journal of the Serbian Chemical Society, National Library of Serbia (2014). https://doi.org/10.2298/JSC131105014A
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Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite
Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...... right-hand side of sample d (close to the scale) and the top left-hand side of sample b (above the o mark). The beautiful and flat sections obtained by sawing, with a diamond saw testify to the good mechanical resistance of the objects, in accordance with the time necessary to saw the shards. This good ...
... How to conciliate antagonist physical and chemical requirements. Ann. Chim. Sci. Materiaux 2005, 30, 673–688. [CrossRef] Hulthen, B. On ceramic ware in northern scandinavia during the neolithic, bronze, and early iron Age: A ceramic-ecological study. In Archaeology and Environment Series (e-book) ...
... made by ancient potters. Obviously, the good mechanical strength due to the fiber reinforcement (the fibrous behavior of the length of the fiber pull-out reaches the millimeter range) was selectively searched for, and at that time the toxicity of asbestos fibers was not recognized. This demonstrates ...Philippe Colomban, Aleksandar Kremenović. "Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite" in Materials, MDPI AG (2020). https://doi.org/10.3390/ma13163597
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Remontni radovi u bušotini sa dubinskom pumpom
Jovana Milošević (2024)Remontni i stimulativni radovi u naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku zonu.U prvom slučaju remontni i stimulativni radovi kod proizvodnih bušotina služe za otklanjanje problema i povećavanje proizvodnje bušotine. Dok u drugom slučaju, kod potencijalnih bušotina su ovi radovi namenjeni završnim obradama ...... Sand-Maduabuchi-Appah/bffcd6dbeefe6c91fd3056a9e354320f1 38ea608 slb. (2015). Preuzeto sa The Defining Series: Perforating Fundamentals: https://www.slb.com/resource-library/oilfield-review/defining-series/defining-perforating Soleša, M. (1996). Optimizacija remontnih i stimulativnih radova. TerraPERM ...
... Problemi nemaju svoj šablon i zbog toga je Jako teško i zahtevno utvrditi ih. Najznačajnija stavka kod ovakvih radova je iskustvo i odlično poznavanje svih delova opreme, kako bi uspeli da sami predvidimo moguće uzroke, ı shodno tome nađemo rešenja. Deo rada će upravo iz tog razloga biti posvećen delovima ...
... naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku ...Jovana Milošević . Remontni radovi u bušotini sa dubinskom pumpom, 2024
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Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication
... belong to the Grandis ammonite Subzone of the upper part of the lower Berriasian. The association described here appears to be close to the coeval ammonite association in Crimea. e 2023 Elsevier Ltd. All rights reserved. 1. Introduction The worldwide definition of the base of the Berriasian is still ...
... version of Breistroffer (1947), as opposed to the newer concept of Hoede- maeker (in Hoedemaeker et al., 2016) or Sarti (2020). The genus Haploceras lacks crenulate ribbing on the ventral side compared to the genus Hypolissoceras. We consider this ribbing to be the basic distinguishing characteristic ...
... arched flanks, descending to the coiling line by an unbounded low rounded zone. The ventral side is narrow and slightly rounded. The greater part of the whorl of both specimens probably belongs to the phragmocone, and the terminal quarter of specimen S80/5 belongs to the body chamber. The phragmocone ...Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović. "Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication" in Cretaceous Research (2023). https://doi.org/10.1016/j.cretres.2023.105623
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Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata
... (Open Geospatial Consortium), outlined within the series of documents “OpenGIS Abstract Specification” [OGC AS] and “OGC Reference Model” [OGC 2008]. There are three basic ways of creating a geodatabase. If collections of geographic data that are to be merged within a geodatabase are available in one ...
... entire system, and at the same time easily access alphanumeric data. The outlined solution is only the first step in creating an integral GIS system for a mine. Hence, further research in this area will focus on extension of the OpmGIS system with thematic classes related to production, integration with ...
... transformed to the physical model for the ArcGIS development environment, which is being used at the Faculty of Mining and Geology in Belgrade for development of GIS applications. Thematic classes presented in this paper encompass only a part of the data related to mine production, and pertain to an important ...Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović. "Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata" in Podzemni radovi, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2012)
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... amount of explosive: 3 red Q Q r (7) where is: r - the distance from the blast site to the monitoring point m, Q - overall amount of explosive in a mine series kg. 2.2. Models of determination of soil oscillation law parameters There are two parameters K and ...
... under control, which gives an opportunity to plan the magnitude of shock waves for each future blast operation (Trajković et al. 2005). In this manner, the negative effects of blasting are reduced, production efficiency is increased and, at the same time, building structures, mining facilities and ...
... environment, the following results were obtained: - Compressive strength (21.1 to 93.0) MPa - Volume weight (17.1 to 26.3) kN/m3 - Density (0.97 to 0.99) kN/m3 - Porosity (0.0004 to 0.026) % - Water suction (0.08 to 0.23) % Parameter determination of soil oscillation law ... ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas
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 ...Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović. "Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas" in 31st International Conference Ecological Truth & Environmental Research-EcoTER'24, Sokobanja, 18-21. jun 2024, Bor : Tehnički fakultet u Boru (2024)