Претрага
253 items
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Оцјена водопропусности понорске зоне Шуковићу (Цернићко поље) помоћу Лижоновог теста
One of the specificities of reservoirs forming in highly karstified terrains is reflected in the wide range of unknowns, specifically during reservoir formation, filling and operation. Unfortunately, despite complex research, many reservoirs constructed in karst terrains have problems with water losses from the reservoir to other aquifers due to ponor and ponor zones which are a common in the karst of Eastern Herzegovina. One of such zones is Šuković ponor located in the southern part of the Cerničko polje ...Петар Војновић, Саша Милановић, Љиљана Васић. "Оцјена водопропусности понорске зоне Шуковићу (Цернићко поље) помоћу Лижоновог теста " in Мултидисциплинарна конференција “Kарст 2022 - Значај, стање и перспективе коришћења и заштите ресурса у карсту", Српска академија наука и уметности (2022)
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Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu
U radu su prikazani rezultati geotehničkih istraživanja za potrebe izgradnje visećeg pešačkog mosta preko klisure reke Đetinje u Užicu. Predviđeno je da most, sistema prednapregnute trake, omogući prelaz pešacima sa desne dolinske strane na stranu Starog grada, koja je opasana strmom liticom (cca. 40 m visine). Za potrebe formiranja geotehničkog modela i strukturnog sklopa krečnjačke stenske mase korišćen je postupak fotogrametrijskog snimanja dronom. Predviđeno je da se zatežuća sila (od oko 30 MN), koju most prenosi na obalni stub, ...fotogrametrija, stabilnost kosina, pukotine, prednapregnuta sidra, test granične nosivosti, paker (Ližonov) test... odgovarajući monitoring tokom izgradnje mosta. Ključne reči: fotogrametrija, stabilnost kosina, pukotine, prednapregnuta sidra, test granične nosivosti, Paker (Ližonov) test GEOTECHNICAL ASPECTS OF CONSTRUCTION OF STRESSED RIBBON BRIDGE IN UŽICE OLD TOWN Summary: This study shows the results of ...
... be accepted and transfered to the rock mass by the system of prestressed anchors. Two investigation test were performed on anchors installed in sub-horizontal boreholes. Successful anchor load test and numerical analysis showed that the rock mass is capable of sustaining tensile Jorce induced by the ...
... monitoring during the construction stage. Keywords: photogrammetry, slope stability, discontinuities, pre-stressed anchors, investigation test, Packer (Lugeon) test ! dr,doc., Rudarsko-geološki fakultet, Univerzitet u Beogradu, Đušina 7, Beograd, z.berisavljevic(ayrgf.bg.ac.rs ! dr,van. prof.,Rud ...Zoran Berisavljević, Miloš Marjanović, Uroš Đurić. "Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu" in Zbornik radova / Međunarodno naučno-stručno savetovanje Geotehnički aspekti građevinarstva i zemljotresno inženjerstvo, Vrnjačka banja, 1-3. novembar 2023., Beograd : Savez građevinskih inženjera Srbije (2023.)
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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)... ANALYSIS OF TEST RESULTS Uniaxial compressive strength was tested on 6 identical samples (1-6). Samples that were exposed to fire (7-12), in order to test uniaxial compressive strength after standard fire test, disintegrated after standard fire test and it was not possible to test uniaxial c ...
... samples exposed to standard fire test according to SRPS EN 1363-1, with the intention to test uniaxial compressive strength after standard fire test. The aim of this study was to examine the uniaxial compressive strength of the rock, before and after standard fire test on the rock mass. The paper presents ...
... exposed to standard fire test according to SRPS EN 1363-1, with the intention to test uniaxial compressive strength after standard fire test. For the sandstone rock mass of determined characteristics, for which it is determined uniaxial compressive strength before standard fire test and obtained results ...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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Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining
... fail. (a) (b) Figure 14. Modified triaxial test equipment for underwater coal mining cutting resistance testing: (a) modified triaxial test equipment, (b) testing wedge position. 7. Test Results 7.1. Triaxial Compression Test (Triaxial Test) Method The triaxial compressive strength is determined ...
... uniaxial compression test method and the wedge test method. 5.1. Uniaxial Compression Test Method The uniaxial compressive strength, σc [23], has no direct relationship to the cutting resistance required by excavation machines. It is only possible to empirically compare the test results with the values ...
... block-shaped rock material samples (modified wedge test method). The results of the laboratory triaxial test allow empirical comparison with the values already available from experience. Minerals 2021, 11, 564 8 of 17 6.1. Triaxial Compression Test (Triaxial Test) Method The triaxial compressive strength ...Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić. "Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11060564
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Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers
This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd... 26(2), 48-51 (1990). H. H. Schmidt and J. Volm, “Dynamic CBR test – new method of embankment quality control,” Geotechnik, 25(4), 271-274 (2000). . Zabielska-Adamska and M. ]. Sulewska, “Dynamic CBR test to assess the soil compactiony” J. Test. Eval., 43(5), 028-1036 (2015). D. Kuttah, “Strong correlation ...
... be expressed in the range of 20% < CBR, < 150% [6]. A CBR, test can be performed in the laboratory (CBR,) and in situ (CBR+p) (Fig. 1). Additional- ly, in-situ CBR, testing can be simulated in the laboratory by conducting the CBR test using cylinders. Other than static CBR, this is the only method ...
... to the shorter duration of the CBR, test. Compared with classic CBR testing, CBR, has the advantage of not using a loading device, that is, a counterweight system as required for static testing (typically heavy construction machin- ery). Instead, the CBR, test is performed by fixing the CBR attachment ...Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović. "Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers" in Soil Mechanics and Foundation Engineering, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s11204-024-09939-x
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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 ...... after testing—triaxial test: (a) 0% AD, (b) 10% AD, (c) 30% AD, (d) 50% AD, (e) 70% AD, (f) 100% AD. Minerals 2021, 11, 813 11 of 19 The parameters of intact rock material for the Hoek–Brown failure criterion [23] were determined based on the test results of the triaxial test and mean values of UCS ...
... rock mass, based on the results of laboratory tests of UCS and triaxial test of composite samples. This paper presents the methodology for determining the mechanical properties, UCS, and triaxial compressive strength or triaxial test on many composite samples with different participation of weaker rock ...
... moment of failure, A—specimen’s cross-section area. Triaxial tests were carried out by the current ISRM recommendations for this type of test [19]. A triaxial test was performed for five different values of confining pressures (σ3), namely, 5, 10, 15, 20, and 30 MPa. Considering that information on “in-situ” ...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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Značaj izvodjenja Proktorovog opita na komunalnom otpadu
Komunalni otpad predstavlja jedan od ključnih problema današnjice. U Srbiji je najčešći vid odlaganja otpada na komunalne deponije i zbog toga je bitno ispravno i sigurno ga skladištiti. Zbijanje komunalnog otpada predstavlja jednu od osnovnih komponenti procesa odlaganja. Kako bi se što bolje predvidelo ponašanje komunalnog otpada neophodno je pre zbijanja na terenu laboratorijski odrediti maksimalnu suvu zapreminsku težinu i optimalnu vlažnost. U dosadašnjoj praksi u svetu za to se koristi standardizovan Proktorov opit. U radu će biti prikazani ...... terrain, for which Standard Proctor test has been used in the world current practice. This paper presents the results of the Proctor test for municipal waste taken from the dump in Plandište. KEY WORDS: municipal solid waste (MSW), compaction, landfill, Standard Proctor test UVOD kako bi se to izbeglo ...
... See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/340660301 THE IMPORTANCE OF PROCTOR TEST PERFORMANCE ON MUNICIPAL SOLID WASTE Conference Paper · November 2019 CITATIONS 0 READS 19 5 authors, including: Some of the authors of this ...
... pre zbijanja na terenu laboratorijski odrediti maksimalnu suvu zapreminsku težinu i optimalnu vlažnost. U u Plandištu. THE IMPORTANCE OF PROCTOR TEST PERFORMANCE ON MUNICIPAL SOLID WASTE ABSTRACT Municipal solid waste management is one of the crucial problems worldwide. In Serbia, the most common ...Jovana Janković, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Laslo Čaki. "Značaj izvodjenja Proktorovog opita na komunalnom otpadu" in Zbornik radova osmog naučno-stručnog međunarodnog savetovanja - Geotehnički aspekti građevinarstva, Savez građevinskih inženjera Srbije (2019)
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Standardization of Serbian gravity database on a test area
Vasiljević Ivana, Ignjatović Snežana, Đurić Dragana. "Standardization of Serbian gravity database on a test area" in 9th Congress of the Balkan Geophysical Society (BGS 2017), Antalya, Turkey, 5. - 9. Nov, 2017, http://www.earthdoc.org:EAGE (2017): 1-5
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Granite resistance to atmospheric attack – test of accelerated weathering
Matović Vesna, Erić Suzana, Đokić Olivera, Matović Nenad, Munjas Branko. "Granite resistance to atmospheric attack – test of accelerated weathering" in Geoekologija XXI vijeka / Međunarodni simpozijum - Geoeco 2010, Žabljak-Nikšić, 21-24 Septembar 2010. godine Crna Gora - Montenegro, Žabljak-Nikšić, Montenegro:Filozofski fakultet (2010): 529-535
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Primena impulsne termografije za ispitivanje aluminijumskih i pleksiglas test uzoraka sa periodičnom strukturom defekata
Tomić Ljubiša, Damnjanović Vesna, Kovačević Aleksandar, Knežević Dragan, Kovačević Katarina. "Primena impulsne termografije za ispitivanje aluminijumskih i pleksiglas test uzoraka sa periodičnom strukturom defekata" in Zbornik radova ETRAN 2014 (58. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku), 2-5 juna 2014, Vrnjačka Banja, Srbija, MO3-2 (2014): 1-6
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Analiza uticaja početne temperature test uzorka pri primeni impulsne termografije
Tomić Ljubiša, Damnjanović Vesna, Mišković Katarina, Bondžulić Boban, Knežević Dragan, Kovačević Aleksandar (2018)Tomić Ljubiša, Damnjanović Vesna, Mišković Katarina, Bondžulić Boban, Knežević Dragan, Kovačević Aleksandar. "Analiza uticaja početne temperature test uzorka pri primeni impulsne termografije" in Zbornik radova ETRAN 2018 no. MO, Beograd, Srbija:Društvo za Etran, Akademska misao Beograd (2018): 314-317
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Water supply management measures in test areas of IPA1
Stevanović Zoran, Dokmanović Petar, Milanović Saša, Polomčić Dušan. "Water supply management measures in test areas of IPA1" in CC WATERS Climate Changes and Impact on Water Supply, Bekgrade:University of Belgrade-Faculty of Mining and Geology (2012): 341-416
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Suitability of the methylene blue test for determination of cation exchange capacity of clay minerals related to ammonium acetate method
Milošević Maja, Logar Mihovil, Dojčinović Biljana, Erić Suzana. "Suitability of the methylene blue test for determination of cation exchange capacity of clay minerals related to ammonium acetate method" in Geophysical Research Abstracts Geophysical Research Abstracts 17, Vienna, Austria :Copernicus Publications 2015 (2015)
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Load test of Large Diameter Piles for the Bridge Across Danube River in Belgrade
Rakić Dragoslav, Šušić Nenad, Basarić Irena, Đoković Ksenija, Berisavljević Dušan. "Load test of Large Diameter Piles for the Bridge Across Danube River in Belgrade" in 15th Danube-European Conference on Geotechnical Engineering DECGE2014 – Geotechnics of Roads and Railways 2, Vienna, Austria :Institute of Geotechnics Ground Engineering, Soil and Rock Mechanics Vienna University of Technology (2014): 867-872
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New data from the Vardar suture zone in the Republic of Macedonia (FYROM) used to test alternative models of Jurassic ophiolite emplacement and Neotethyan evolution in the Balkan region
Robertson H.F. Alastair, Trivić Branislav, Đerić Nevenka. "New data from the Vardar suture zone in the Republic of Macedonia (FYROM) used to test alternative models of Jurassic ophiolite emplacement and Neotethyan evolution in the Balkan region" in Geophysical Research Abstracts 13 no. EGU2011-1527, Max-Planck-Str. 13, 37191 Katlenburg-Lindau, Germany:Copernicus GmbH (2011)
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Analiza nosivosti vertikalno opterećenog šipa za potrebe izgradnje petlje „Merošina 1“ na autoputu E-80 deonica: Niš – Merošina
U Srbiji je počela izgradnja autoputa E-80 koji će predstavljati saobraćajno čvorište zapadnog Balkana i biće deo glavne regionalne transportne mreže jugoistočne Evrope. Njegova ukupna dužina kroz Srbiju iznosi 77 km, a prva deonica u dužini od 5.5 km je završena i puštena u saobraćaj krajem jula 2023. god. To je prva od četiri deonice Sektora 1 čija je dužina 32.65 km. U sklopu petlje „Merošina 1“ izgrađen je nadvožnjak koji je oslonjen na devet stubnih mesta na međusobnom ...Dragoslav Rakić, Nikola Božović, Miloš Stevanović, Milan Bogdanović. "Analiza nosivosti vertikalno opterećenog šipa za potrebe izgradnje petlje „Merošina 1“ na autoputu E-80 deonica: Niš – Merošina" in Geotehnički aspekti građevinarstva i zemljotresno inženjerstvo – Vrnjačka Banja, 01-03. novembar 2023., Beograd : Savez građevinskih inženjere Srbije (2023)
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Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja
Jovana M. Janković Pantić (2022)Odlaganje otpada na komunalne deponije predstavlja osnovni način zbrinjavanja otpada u Srbiji. Kako bi se prostor za deponovanje materijala racionalno koristio potrebno ga je svakodnevno zbijati sa unapred definisanom količinom vode koja se dodaje. Dobro zbijeni komunalni otpad zauzima manju zapreminu i omogućuje sigurnije skladištenje, pa je korisno prethodno laboratorijski odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). U Srbiji do sada nisu određivani parametri zbijanja, dok je u svetu primenjivana standardna metoda (Proktorov opit) ...Jovana M. Janković Pantić. Geotehnički efekti razaranja komunalnog otpada različitim postupcima zbijanja, Beograd : [J. Janković Pantić], 2022
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Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian
The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...... Figure 3: Precision of lemmatization per token, obtained by two TreeTagger based taggers 3959 sentences tokens words train dev test train dev test train dev test sr basic 7,677 965 965 141,438 18,055 17,985 119,378 15,194 15,116 sr 25 10,661 1,336 1,348 233,027 29,486 29,801 201,489 25,432 25 ...
... of PoS-tagging with SerSpaCy tagger on different test sets and for different PoS-tags Figure 5: Results of PoS-tagging with TT19 tagger on different test sets and for different PoS-tags Figure 6: Results of PoS-tagging with TT11 tagger on different test sets and for different PoS-tags taggers as well ...
... Intera respectively. Each of the subsets was split into training, development and test sets (80%:10%:10%). In Table 4 the distributions of number of sentences, tokens and words per training, devel- opment and test sets are given. Using the CLI train command, we trained five different models. Each ...Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić. "Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian" in Proceedings of the 12th Language Resources and Evaluation Conference, May Year: 2020, Marseille, France, European Language Resources Association (2020)
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Geomechnical research for the new bucket wheel excavator testing at Open pit “Filijala”
Since 1976 cement marl excavation at open-pit mine „Filijala” is carried out by continuous exploitation technology using bucket wheel excavator SH 400 manufactured by Orenstein und Koppel (O & K) company. Due to the bucket wheel excavator time-worn and high operating cost it was necessary to replace it with new one. In order to test the new bucket wheel excavator and prove its capacity a testing zone was defined as test block for excavation, in which the bucket wheel ...Vladimir Čebašek, Nebojša Gojković, Veljko Rupar, Miodrag Pribićević. "Geomechnical research for the new bucket wheel excavator testing at Open pit “Filijala”" in Рударски гласник, Рударски институт - Београд (2020). https://doi.org/10.25075/BM.2020.07
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Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field
Most of the wells in the oilfield Turija are operating with sucker rod pumps, where casing pressure at around 15 bar, and with marginal production rates. The high value of casing pressure indicates high pressure on the face of the formation and depends directly on well productivity. In addition, with increasing value of the casing pressure gas column in the annulus is moving the dynamic fluid level near pump intake and more gas is entering the pump, it results ...beam gas compressor, BGC, increase productivity, sucker rod pump, SRP, mature field, artificial lift, production optimisationBojan Martinović, Dušan Danilović, Branko Grubač, Robert Fadiga. "Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field" in International Journal of Oil Gas and Coal Technology (2022)