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2453 items
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Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example
Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska. "Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2020). https://doi.org/10.1007/978-3-030-60227-7_29
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Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research
магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија... During the acquisitions of the three modes, traverses were oriented along a north-south direc- tion. In the fi rst case, the operator, at the end of the profi le, made a semicircle and continued the measurement on the next adjacent profi le in a zig- zag fashion. Throughout the acquisition, the data ...
... saved in the same fi le with the included GPS data. With this method of measurement, the adja- cent traverses were reverse oriented (Figure 1.a.). In the second mode of acquisition, the oper- ator, after the completion of measuring each tra- verse, circumvented the test polygon, and on the next traverse ...
... entered on the same side as the pre- vious one, in a parallel fashion. Using this type of acquisition, all profi les were oriented in the same direction (Figure 1.b.). To accelerate the measurement, in the parallel third mode, it was started from a mid-fi eld point. The operator, after the completion ...Mirko Petković, Vesna Cvetkov, Branislav Sretenović. "Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research" in Arheologija i prirodne nauke (2014)
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Стратешко планирање функционалности подземних просторија моделом прогнозе деформација
Лука Црногорац (2023)Релативно велике деформације подградне конструкције у подземним рудницима угља у Републици Србији представљају један од главних проблема за постизање планиране производње угља. Деформације подграде су директна последица статичких и динамичких оптерећења стенске масе и у многоме зависе и од времена трајања изложености подграде утицају подземног притиска. Код ниско механизованог радног процеса долази до повећаног излагања подземних просторија утицају подземног притиска услед дугог производног циклуса који је често пропраћен застојима у раду. Веома често подземне просторије се санирају и по ...Лука Црногорац. Стратешко планирање функционалности подземних просторија моделом прогнозе деформација, Београд : [Л. Црногорац], 2023
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Numerical simulation of the Late Jurassic closure of the Vardar Tethys
... our ongoing research on constraining geodynamic conditionsassociated with the final closure of the Vardar branch of the Tethys Ocean by means of applicationof numerical simulations (previous interim results reported in EGU2020-5919). The aim of our numerical study is to test the hypothesis that a single ...
... equations: the continuity equation, the Navier-Stokes equations and the temperatureequation. To this end we used I2VIS thermo-mechanical code which utilizes marker in cellapproach with finite difference discretization of equations on a staggered grid [Gerya et al., 2000;Gerya&Yuen, 2003]. The 2D model ...
... magnitude ofthe second phase on model evolution is also explored. Our so far obtained simulations were able to reproduce the westward obduction and certainextension processes along the active (European) margin, which match the existing geologicalrelationships. However, the simulations involve an unreasonably ...Nikola Stanković, Vesna Cvetkov, Vladica Cvetković. "Numerical simulation of the Late Jurassic closure of the Vardar Tethys" in EGU General Assembly 2021, Copernicus GmbH (2021). https://doi.org/10.5194/egusphere-egu21-9893
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2D Numerical Simulation of Intraoceanic Subduction during the Upper Jurassic Closure of the Vardar Tethys
... our ongoing research on constraining geodynamic conditionsassociated with the final closure of the Vardar branch of the Tethys Ocean by means of applicationof numerical simulations (previous interim results reported in EGU2020-5919). The aim of our numerical study is to test the hypothesis that a single ...
... equations: the continuity equation, the Navier-Stokes equations and the temperatureequation. To this end we used I2VIS thermo-mechanical code which utilizes marker in cellapproach with finite difference discretization of equations on a staggered grid [Gerya et al., 2000;Gerya&Yuen, 2003]. The 2D model ...
... magnitude ofthe second phase on model evolution is also explored. Our so far obtained simulations were able to reproduce the westward obduction and certainextension processes along the active (European) margin, which match the existing geologicalrelationships. However, the simulations involve an unreasonably ...Nikola Stanković, Vesna Cvetkov, Vladica Cvetković. "2D Numerical Simulation of Intraoceanic Subduction during the Upper Jurassic Closure of the Vardar Tethys" in EGU General Assembly 2020, Copernicus GmbH (2020). https://doi.org/10.5194/egusphere-egu2020-5919
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Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines
This paper presents the model for the identification of reference points on the lifetime curve of engineering systems. This curve commonly represents the increase and decline of failure in relation to time. A direct correlation between failure rate and costs is assumed in this paper, therefore, statistical and empirical analysis of costs provided reference points. This approach is used for positioning stages of the engineering system’s lifetime with a minimal number of failures and costs, regardless of whether these ...Electrical and Electronic Engineering,Industrial and Manufacturing Engineering, Control and Optimization, Mechanical Engineering, Computer Science (miscellaneous), Control and Systems EngineeringUgljesa Bugarić, Milos Tanasijević, Stevan Djenadić, Dragan Ignjatović, Ivan Janković. "Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines" in Machines, MDPI AG (2022). https://doi.org/10.3390/machines10110995
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Depth geological relations of the wider area of Belgrade - based on the wells and geophysical data
Đorđe Marinović, Ljupko Rundić (2020)Предметна референца обухвата простор шире околине Београда укупне површине око 2.000 km2. Аутори су објединили капиталне геолошке и геофизичке податке обезбеђене површинским истраживањима и мултидисциплинарним елементима из 52 бушотинe са дубинама између 33 и 2.733 m. Конкретни палеонтолошки налази специјализованих аналитичара са детерминацијом макро и микрофауне и флоре, презентовани су како из неогених формација тако и из басенске подине. Осим конвенционалних петролошких описа стена цитиране су и микроскопске детерминације интрузивних и екструзивних магматита. Из затвореног басенског простора корелативно су ...Đorđe Marinović, Ljupko Rundić. "Depth geological relations of the wider area of Belgrade - based on the wells and geophysical data" in Annales geologiques de la Peninsule balkanique, National Library of Serbia (2020). https://doi.org/10.2298/GABP201030009M
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Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia
Around 2/3 of electricity production in Serbia originates from coal-fired thermal power plants. The most significant domestic coal deposits are lignite deposits, a type of low -quality coal that causes negative health, climate and environmental impacts during the combustion. To reduce those negative impacts on domestic electricity production and to promote environmental awareness, the Serbian Energy Sector Development Strategy and the National Action Plan for Use of Renewable Energy Sources indicate the plan for increasing the share of ...Strategija obnovljive energije, Održiva energija, Proizvodnja električne energije, Solarna energija, Biomasa, Hidroenergije, Energija vetra... pacts during the com bustion. To reduce th ose n egative im pacts on dom estic electricity pr oduction a n d to pr om ote env ironmental a w areness, the Serbian En ergy Sector Development Strategy and the National Action Plan for Use of Ren ewable En ergy Sources in dicate the plan for in creasing ...
... electricity production. When considering the best solution among the available RES, it is necessary to implement a multi -perspective approach th at consists of econom ic, environmental, technical, and socio-political criteria. Further on, the Fu zzy A nalytical Hierarchy Pr ocess (FA HP) m ethod ...
... ass, hydro, solar and wind) in regard to the defined criteria. The obtained weights for the a n alyzed RES are formed according to the experts' judgments and availa ble literature. The results of th e FAHP reveal that biom ass has the highest rank among the RES to generate electricity and a s su ...Boban Pavlović, Dejan Ivezić, Marija Živković. "Identification of the Best Available Renewable Energy Source for Electricity Production in Serbia" in Conference on Sustainable Development of Energy, Water and Environment Systems, Sarajevo, 28.6.-2.7.2020., Faculty of Mechanical Engineering and Naval Architecture, Zagreb (2020)
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Hydrographic and hydrological characterization of the Vodenička and Rosomačka rivers
Vesna Ristić Vakanjac, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković (2017)The Visočica River rises in Bulgaria, on the Berovo Mountain. Its course in Bulgaria is 16.7 km long. It enters Serbia near the village of Donji Krivodol. Up to the village of Pakleštica, or the beginning of Lake Zavoj, its right-bank tributaries are the Krivodolštica, the Vodenička, the Rosomačka and the Dojkinačka. There are no left-bank tributaries. Among the tributaries, water levels and discharges are gauged only on the Dojkinačka River. The Vodenička had also been gauged but only ...... Slavinja, where the Rosomačka joins the Visočica. The catchment has an elongated shape, except that its lower part is very narrow, with no tributaries. The catchment area of the Rosomačka is 22.9 km 2 . On the way from its mouth to the source at the village of Rosomač (the last 2.4 km), the Rosomačka ...
... 4.54 m 3 /s of water on average. Given that the average discharge of the Dojkinačka is 3.23 m3 /s, about 1.3 m 3/s comes from the Vodenička, the Rosomačka and the immediate catchment of the Visočica. In view of the fact that the Vodenička joins the Visočica between the gauging stations of Izatovac ...
... Ržana on the Visočica) is 403 km2 - 227 km 2 = 176 km 2 . This area includes the catchments of the Dojkinačka and the Rosomačka, such that the immediate catchment of the Visočica itself is 176 - 139 - 22.9 = 14.1 km 2. Along the subject reach the Visočica receives the discharges of the said ...Vesna Ristić Vakanjac, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Jelena Ratković. "Hydrographic and hydrological characterization of the Vodenička and Rosomačka rivers" in Pirotski zbornik, Pirot : Narodna biblioteka Pirot (2017). https://doi.org/10.5937/pirotzbor1742001R
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Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking
Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović. "Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking" in X International Scientific Congress Innovations 2024, Varna, Bulgaria, 24-27. jun 2024, Scientific Technical Union of Mechanical Engineering "Industry 4.0" (2024)
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Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia
Dragoljub Bajić, Dušan Polomčić (2014)A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables... applied to select the best alternative. The fuzzy analytic hierarchy process method was used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec- tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternatives ...
... days. Based on the predictive analysis and the three iden- tified alternatives for the groundwater control system, as described in POLOMČIĆ & BAJIĆ (2014), the selec- tion of the best alternative applying the FAHP approach is discussed below. Fuzzy Optimization Method Apart from the several approaches ...
... 13,1) W = (0.29,0.08,0.63) Based on these calculations, the ultimate evaluation of the alternatives is shown in Table 2. The criteria-based assessment showed that the best solution for the groundwater control system of the “Bezdan 1” PS was Alternative 2. Here the control system is comprised of 12 ...Dragoljub Bajić, Dušan Polomčić. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia" in Geološki anali Balkanskoga poluostrva, Belgrade : University of Belgrade - Faculty of mining and geology (2014). https://doi.org/10.2298/GABP1475103B
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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... greatest role. Due to the impossibility of discharging, water from the system as a result of to the Red Permian sandstone overthrust on the western rim and the formation of Neogene basins on the northern and southern rim of the massif, the water percolates deeper underground throug a system of small ...
... Dionex ICS-900 [12]. The hydrochemical and isotopic characteristics of the water were determined with the aim of establishing, a hydraulic connection of the groundwater based on the similarity of the results, thereby confirming that this water belongs to the same karst system. The results were associated ...
... character, among, which the Suvi Do and Krepoljinska Banjica System, the Sisevac System, and the Krivi Vir System stand out [12,21], as well as the Mlava-Belosavac-Belosavac 2 System, located on the northern edge of the Beljanica Massif [12,21]. Finally, based on to the obtained data and performed ...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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New data from the Lower Cretaceous carbonate platform deposits of Dimitrovgrad section (Southeastern Serbia)
... investigation on the Serbian side of the Getic platform was limited to solving biostratigraphy, paleontology and facies distribution issues on local scale, mostly in northeastern Serbia. The most exhaustive research on the Getic platform in southern and central Serbia dates back to the 70s of last century ...
... facies in the area of Getic unit defined Beriasian, Valanginian, Hauterivian and Urgonian like facies. These deposits result from the continuous trend of shallow- water sedimentation that started in the Middle Jurassic time. Recent studies on the Getic carbonate platform succession focused on outcrops ...
... (Jankičević, 1978). The study area is located in the Carpatho-Balkanides of Serbia, close to the town of Dimitrovgrad, and includes the narrow belt of Lower Cretaceous (Valanginian-Hauterivian) carbonate successions in the southern sector of the Getic Carbonate Platform. The identified carbonate facies ...Jelena Stefanović, Bojana Džinić, Giovanna Della Porta, Dejan Radivojević. "New data from the Lower Cretaceous carbonate platform deposits of Dimitrovgrad section (Southeastern Serbia)" in 90° Congresso della Società Geologica Italiana, Trieste, 14-16 septembar, 2021, Società Geologica Italiana (2021)
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Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)
Miloš Radonjić (2020)This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides... s within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological da- ta and the characteristics of the fossil material support the proposed model in which the sedi- ment was at least partially transported by hyperpycnal currents. Furthermore, based on the as- sessment ...
... throughout the beds. Cleyey chips with diameter of 2–3 cm are also present. Both the lower and upper surfaces of these beds are sharp. Beginning approximately from the 9 m mark of the column, a change of the colour of the rocks on a freshly broken surface is evident. The predominant colour of the lithologic ...
... within the lower parts of the sandstone layers (Fig. 8). The number of accumulated fragments visible to the naked eye on a single lamina ranges from 12- ~80 pieces on a surface of 10 cm2. Most often, several lami- nae within the same bed contain detritus accumulations. The late- ral extent of the majority ...Miloš Radonjić. "Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)" in Geologia Croatica, Croatian Geological Survey (2020). https://doi.org/10.4154/gc.2020.13
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Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia
This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...... setting The studied area is located in Serbia ~ 80 km south of Belgrade on the central axis of the Sava Zone that is inter- preted as a suture of the final closure of the northern Neotethys branch (Schmid et al. 2008). The Mesozoic geology of the central Balkan Peninsula reflects the evolution ...
... with the aim of constraining hydrothermal system evolution. The observed trend of the REE in garnet is useful for understanding the mechanisms for incorporation of trace elements and REE into garnets and highlighted the evolution of the hydrothermal sys- tem. Zircon dating was done on Q-latitic ...
... or less terrigenous component. The carbonate unit is not of con- stant thickness in respect to the clastic ones, which are closer to the surface. Marlstones, almost pure limestones and transi- tional varieties were recognized within the carbonate unit, depending on the amount of clastic component. Carbonate ...Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol. "Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia" in Geologica Carpathica, Central Library of the Slovak Academy of Sciences (2021). https://doi.org/10.31577/GeolCarp.72.1.2
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Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals
Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić. "Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals" in Review on advanced materials science, Walter de Gruyter GmbH (2020). https://doi.org/10.1515/rams-2020-0043
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The Effect of Gravel and Sand Mining on Groundwater and Surface Water Regimes — A Case Study of the Velika Morava River, Serbia
Milan Kresojević, Vesna Ristić Vakanjac, Dragan Trifković, Jugoslav Nikolić, Boris Vakanjac, Dušan Polomčić, Dragoljub Bajić (2023)Овај рад описује како неконтролисано и нелегално откопавање песка и шљунка може утицати на режим површинских и подземних вода на местима где постоји активна хидрауличка веза између њих, са студијом случаја реке Велике Мораве у Србији. Такође, промена геометрије попречног профила, као последица антропогених и природних фактора, отежава уливање ове реке за укључивање у водне токове Србије. Плодност Велике Мораве омогућила би развој речног саобраћаја како за трговачке бродове, тако и за пловила Речне флотиле Војске Србије. Корелације између ...Milan Kresojević, Vesna Ristić Vakanjac, Dragan Trifković, Jugoslav Nikolić, Boris Vakanjac, Dušan Polomčić, Dragoljub Bajić. "The Effect of Gravel and Sand Mining on Groundwater and Surface Water Regimes — A Case Study of the Velika Morava River, Serbia" in Water, MDPI AG (2023). https://doi.org/10.3390/w15142654
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Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)
... meters. For example, in the KGK 14 well, just below the Pontian sand, the Pannonian marl on the absolute height of less than 100 meters was discovered. However, only a few hundred meters away in the northeast direction, at the foot of the Torlak hill, same Pannonian marl are found on surface at an altitude ...
... taking into account the sedimentation rate for the carbonate layers. Based on the obtained results we can suggest that the change from normal to reversed polar- ity in the lower part of the Eastern Paratethys Konkian (MOLOSTOVSKY & CHRAMOV, 1997; GREBENYUK, 2004) relates to the Chron C5AAn/C5Ar.3r ...
... taking into account the sedimentation rate for the carbonate layers. Based on the obtained results we can suggest that the change from normal to reversed polar- ity in the lower part of the Eastern Paratethys Konkian (MOLOSTOVSKY & CHRAMOYV, 1997; GREBENYUK, 2004) relates to the Chron C5SAAn/C5Ar.3r ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević. "Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)" in 7th International Workshop: Neogene of Central and South-Eastern Europe, Velika, Croatia, maj 2017, Croatian Geological Society (2017)
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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)
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Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise
Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín. "Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise" in Science Advances, American Association for the Advancement of Science (AAAS) (2023). https://doi.org/10.1126/sciadv.adi2698