Претрага
266 items
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Definisanje strukturnih odnosa primenom postupka horizontalni gradijent
Različiti postupci matematičkih transformacija se mogu primeniti na gravimetrijskim i magne tometrijskim podacima, kako bi se na istražnom terenu definisali strukturno-tektonski odnosi. U radu su prikazani rezultati dobijeni korišćenjem postupka horizontalni gradijent i ukupni horizontalni gradijent na gravimetrisjkim podacima. Navedeni postupci su pomogli da se detektuju kontakti sa velikim padnim uglom (vertikalni ili subvertikalni kontakti), koji se mogu interpretirati kao rasedi. Za test područije uzet je istražni prostor koji se nalazi na jugoistoku Srbije u okolini Vranjskog basena. Položaji ...... postupci su pomogli da se detektuju kontakti sa velikim padnim uglom (vertikalni ili subvertikalni kontakti), koji se mogu interpretirati kao rasedi. Za test područije uzet je istražni prostor koji se nalazi na jugoistoku Srbije u okolini Vranjskog basena. Položaji neotektonskih raseda detektovanih tokom ...
... gradijent na podacima Buge- ovih anomalija mogu se detektovati kontakti, koji ima- ju veliki padni ugao, a koji se mogu interpretirati kao rasedi. Kao test područje izabran je širi prostor oko Vranjskog basena. Za definisanje položaja raseda na istražnom prostoru i za proveru da li detektovani rasedi ...
... These techniques helped to detect contact with a large dip angle (vertical or subvertical contacts), which can be interpreted as faults. For the test area we take the study area located in southeast Serbia around Vranje basin. The positions of neotectonics faults detected during geological survey ...Snežana Ignjatović, Ivana Vasiljević, Natalija Jovanović. "Definisanje strukturnih odnosa primenom postupka horizontalni gradijent" in Tehnika, Beograd : Savez inženjera i tehničara Srbije (2019). https://doi.org/10.5937/tehnika1905664I
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An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction
Dejan Ćebić, Nebojša Ralević, Marina Marčeta. "An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction" in Mathematical Communications (2020)
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Mesozoic carbonate rocks in Serbia used as dimension stone
Vesna Matović, Tijana Vojnović Ćalić (2016)The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...... (dry, water sutured, and after frost) were determined fol- lowing the test procedure defined in SRPS.B.B8.012 (1987) (corresponding to European Committee for Standardization EN 1926:2010). The Bohme abrasion resistance test was performed according to SRPS.B.B8.015 (1984) (corre- sponding to ...
... stone test methods—determination of real density and apparent density, and of total and open porosity European Committee for standardization EN 14157 (2008) Natural stones. Determination of abrasion resistance European Committee for standardization EN 13755 (2009) Natural stone test method ...
... (1981) Testing of natural stone—determination of water absorption SRPS B.B8.001 (1982) Testing of natural rock—freezing test for natural stone SRPS B.B8.015 (1984) Wear test—87rinding wheel method SRPS B.B&.012 (1987) Natural stone—testing: of compressive strength SRPS B.B3.200 (1994) Natural ...Vesna Matović, Tijana Vojnović Ćalić. "Mesozoic carbonate rocks in Serbia used as dimension stone" in Bulletin of Engineering Geology and the Environment, Springer Science and Business Media LLC (2016). https://doi.org/10.1007/s10064-015-0722-0
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method... examined according to the standard EN 1328-1, the solid particles volume weight test followed the standard EN 1097-7, grain size composi- tion was tested according to EN 933-1, EN 451-2 and SRPS U. B1.018., and the pH value test was done according to SRPS H. C8.209. All the chemical tests on the fly ash ...
... peaks 2θ (°), the value of the flange dis- tance d (m), and the corresponding intensities (I) use impulse unite (imp). 5. RESULTS AND DISCUSSION The test results of the physical properties are shown in Table 1. The mean values, as well as the minimum and maximum values of ash and slag samples, are ...
... belongs to a silicate group. Percentage compositionof minerals in the samples of the fly ash and slag are shown in Table 3. Comparing the results of test samples (Table 3) by the X-ray diffraction method it can be observed that: • all samples of ash contain a significant amount of amor- phous material ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach
Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...... was used instead of SD. After checking the normality of distribution, the statistical analysis involved Student’s t-test for two sets of results or ANOVA with Turkey HSD as a post hoc test for three results groups. Statistical analysis was performed using IBM SPSS Statistics software (v. 25). p < 0.05 ...
... similar to the ones in the corresponding suspensions (p = 0.563 and 0.965 for F5 vs. S5, and F6 vs. S6, respectively, Student t-test) except in the case of F9 (p < 0.01, Student t-test). In this formulation, the solubility of DK-I-60-3 in 0.1 M HCl was surprisingly high. The highest solubility in phosphate ...
... Student t-test). In investigated solid tissues, although average values of AUC seem to be different, even two times higher in the group of fed animals, statistically the differences were not significant (p = 0.933, 0.484, and 0.719 for brain, liver, and kidney, respectively, Student t-test), due to ...Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić. "Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach" in Pharmaceutics, MDPI, Basel, Switzerland (2021). https://doi.org/10.3390/pharmaceutics13081188
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Математика 2
Драган Станков (2020)Драган Станков. Математика 2, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2020
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Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu
Nikoleta Aleksić (2021)... treatment of contaminated soil, solid waste and sludges, Science Report, Environment Agency, Bristol. [4] ASTM D1557-00 Standard test method for laboratory compaction characteristics of soil using modified effort American Society for Testing Materials. Annual book of ASTM standards: ASTM D1557-91 ...
... distribuciju, korišćena je jednosmerna ANOVA praćena Tukey-evim HSD post-hoc testom. U suprotnom, korišćen je Kruskal-Wallis H testa praćen Mann-Whitney U testom. Korelacije su ispitane korišćenjem Spearman-ovog korelacionog testa rangova. Obrada podataka vršena je u programu STATISTICA Software Package ...
... je praćenjem izluživanja teških metala primenom različitih testova izluživanja: dinamički test DIN 3841-4 S4, Toxicity Characteristic Leaching Procedure-TCLP i California Waste Extraction-WET test. Na osnovu rezultata primenjenih testova izluživanja, pomenute smeše su se pokazale kao neopasan otpad ...Nikoleta Aleksić. "Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu" in VIII Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“, 2021, Prirodno-matematički fakultet, Novi Sad (2021)
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Збирка решених задатака из Mатематике I
Драган Станков (2016)Драган Станков. Збирка решених задатака из Mатематике I, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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Distant Reading in Digital Humanities: Case Study on the Serbian Part of the ELTeC Collection
Ranka Stanković, Cvetana Krstev, Branislava Šandrih Todorović, Duško Vitas, Mihailo Škorić, Milica Ikonić Nešić (2022)In this paper we present the Serbian part of the ELTeC multilingual corpus of novels written in the time period 1840-1920. The corpus is being built in order to test various distant reading methods and tools with the aim of re-thinking the European literary history. We present the various steps that led to the production of the Serbian sub-collection: the novel selection and retrieval, text preparation, structural annotation, POS-tagging, lemmatization and named entity recognition. The Serbian sub-collection was published ...Ranka Stanković, Cvetana Krstev, Branislava Šandrih Todorović, Duško Vitas, Mihailo Škorić, Milica Ikonić Nešić. "Distant Reading in Digital Humanities: Case Study on the Serbian Part of the ELTeC Collection" in Proceedings of the Language Resources and Evaluation Conference, June 2022, Marseille, France, European Language Resources Association (2022)
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Parallel Bidirectionally Pretrained Taggers as Feature Generators
In a setting where multiple automatic annotation approaches coexist and advance separately but none completely solve a specific problem, the key might be in their combination and integration. This paper outlines a scalable architecture for Part-of-Speech tagging using multiple standalone annotation systems as feature generators for a stacked classifier. It also explores automatic resource expansion via dataset augmentation and bidirectional training in order to increase the number of taggers and to maximize the impact of the composite system, which ...Ranka Stanković, Mihailo Škorić, Branislava Šandrih Todorović. "Parallel Bidirectionally Pretrained Taggers as Feature Generators" in Applied Sciences, MDPI AG (2022). https://doi.org/10.3390/app12105028
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Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt.
Branislav Petrović (2022)The epikarst is a part of the karst outcrop that is located within the unsaturated zone and represents a complex point of contact and mixing of unconsolidated material from the terrain surface. The correct and complete perception of epikarst, its degree of development and the presence on the limestone terrain can be achieved with a multidisciplinary approach. The study area for the applied multidisciplinary research was the Eastern part of karst massif Suva Planina Mt. One important part of ...Branislav Petrović. "Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt." in KARST 2022: "Importance, State of the Art, and Prospective of Utilization and Protection of Resources in Karst", Serbian Academy of Sciences and Arts (SASA) (2022)
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Estimating hydraulic parameters for the complex hydrodynamic models
Hydrodynamic models have usually been calibrated manually, by trial-and-error, with different values of hydraulic parameters and hydraulic characteristics of boundary conditions. This method of calibration and estimation of hydraulic parameters requires an extensive knowledge and experience of experts, but whether the resulting solution includes an optimal set of parameters still remains an open question. An optimization method founded upon the Gauss-Marquardt-Levenberg algorithm, along with PEST software based on that algorithm, introduces automation of model calibration with regularization, which substantially ...Dušan Polomčić, Dragoljub Bajić, Jelena Ratković, Bojan Hajdin. "Estimating hydraulic parameters for the complex hydrodynamic models" in Mining and Metallurgy Engineering Bor, Centre for Evaluation in Education and Science (CEON/CEES) (2018). https://doi.org/10.5937/mmeb1704029P
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An aproach to Implementation of blended learning in a university setting
... content, goals, outcome, as well as the basic course materials, and dynamic data – information on all important events during the course: results of test and activities, various announcements, additional course materials added by teachers, etc. In the initial phase of portal development the basic ...
... more appropriate to the course. Besides course materials, teachers have the possibility of posting various announcements related to their course, test and exam results, examples of previous tests or lists of oral exam topics, links to internal or external resources, etc. Figure 1: FMG CMS ...
... available. This gives them the opportunity to get prepared for a forthcoming instruction class, download course materials or get informed about their test and exam results, date and time of forthcoming tests and exams, etc., without being physically present in the FMG building. Course materials ...Ivan Obradović, Ranka Stanković, Olivera Kitanović, Jelena Prodanović . "An aproach to Implementation of blended learning in a university setting" in Proceedings of the Second International Conference on e-Learning, eLearning 2011, September 2011, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2011)
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Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)
Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović. "Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)" in Challenges : Sustainable Land Management – Climate Change, Advances in Geoecology 43, Catena Verlag GMBH (2014)
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The Newton method for solving nonlinear equations based on aggregation operators
Nebojša M. Ralević, Dejan Ćebić (2019)Nebojša M. Ralević, Dejan Ćebić. "The Newton method for solving nonlinear equations based on aggregation operators" in XLVI International Symposium on Operational Research SYM-OP-IS, Kladovo, 15-18.9.2019, Универзитет у Београду (2019)
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Correlability of Solar Wind with Seismic Events in the Balkan Peninsula Zone
The Solar Heliospheric Observatory (SOHO) satellite was launched on the 2nd of December 1995 at L1 Lagrange point (1.5×106 km from Earth) with the purpose of gathering data for helioseismology, remote sensing of the solar atmosphere, and solar wind in situ. The satellite was positioned into orbit in early 1996, with data acquisition expected to commence on January 20th. The correlation between increased values of solar wind parameters and earthquakes in the Balkan peninsula zone between 1996 and 2018 ...Filip Arnaut, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov. "Correlability of Solar Wind with Seismic Events in the Balkan Peninsula Zone" in Geološki anali Balkanskog poluostrva, Beograd : Univerzitet u Beogradu - Rudarsko geološki fakultet (2021). https://doi.org/10.2298/GABP211029008A
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Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia
The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...municipal solid waste, secondary compression index, ratio of modified secondary and primary compression indexDragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić. "Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia " in 20th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE), ICMS Australasia (2022)
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The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass
Construction of E75 highway section through Grdelica gorge was one of the most demanding projects realized in recent Serbian history. The alignment approximately 25 km long consists of several tens of bridges, two tunnels, three galleries and cuts with total length of 6 km. The alignment passes through highly anisotropic Palaeozoic schist rock formation of different weathering grades. This study focuses on shear strength properties of discontinuities, which are found to be the critical feature contributing to the occurrence ...Dušan Berisavljević, Zoran Berisavljević, Svetlana Melentijević. "The shear strength evaluation of rough and infilled joints and its indications for stability of rock cutting in schist rock mass" in Bulletin of engineering geology and the environment, Springer (2022). https://doi.org/10.1007/s10064-022-02580-8
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Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications
The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...... classification of reversal test (McFadden and McElhinney 1990); VGP: Virtual Geomagnetic Pole; Lat. N, Long. E: latitude and longitude of the Virtual Geomagnetic Pole, respectively. The tilt-test (Enkin 2003) is negative for the Cretaceous sediments Fig. 8 Regional tilt test for Cretaceous sediments ...
... reversal test (McFadden and McElhinny 1990) is positive (Table 4). These features characterize ,,ancient‘‘ magneti- zations, which are not necessarily primary, but were acquired while the tectonic unit remained in the same orientation at the same latitude. The more powerful tilt test (Enkin 2003) ...
... Dimitrijević, M. D. (1997). Geology of Jugoslavia (p. 187). Beograd: Geoinstitut-Barex. Enkin, R. (2003). The direction-correction tilt test: An all-purpose tilt/fold test for paleomagnetic studies. Earth and Planetary Science Letters, 212, 151–166. Filipović, I., Pavlović, Z., Marković, B., Rodin ...Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov. "Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications" in Swiss Journal of Geosciences, Basel : Springer International Publishing (2018). https://doi.org/10.1007/s00015-018-0321-8
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Pregled hidrogeoloških istraživanja novootkrivenih ležišta metaličnih mineralnih sirovina na prostoru Srbije
Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović, Jakov Andrijašević (2022)Rastuća potražnja za mineralnim sirovinama, zavisnost evropske industrije od njihovog uvoza, kao i otvaranje tržišta u zadnjih 20-ak godina bili su pokretač intenzivnih istraživanja ležišta mineralnih sirovina na području Srbije. Ova istraživanja za rezultat su imala otkriće važnih ležišta bora i litijuma „Jadar“ i „Valjevo“, sedimentnih ležišta zlata „Bigar i Korkan“ i bakra i zlata „Čukaru Peki“. Sastavni deo ovih aktivnosti, posebno u okviru značajnijih novootkrivenih metaličnih ležišta, bila je hidrogeološka karakterizacija ležišta i okolorudnih terena. U razmatranom periodu ...Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović, Jakov Andrijašević. "Pregled hidrogeoloških istraživanja novootkrivenih ležišta metaličnih mineralnih sirovina na prostoru Srbije" in Zbornik radova XVI srpskog Simpozijum o hidrogeologiji sa međunarodnim učešćem, Univerzitet u Beograd, Rudarsko-geološki fakultet (2022)