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337 items

  • Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine

    Dragan Živković (2024)
    Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...
    DInSAR, Istočno anatolijski rased, Kahramanmaraški trostruki spoj

  • Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer

    Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)
    ... and residence time for the pollutant transport (as recently reviewed legislation in the two countries required); ' introduce river bank filtration along major rivers such as the Danube and the Tisa; . initiate a suruey for artificial recharge, where natural conditions would be assumed to be promising ...
    ... project are supposed to range from the national level to the very local one: 1) strengthening bilateral technical cooperation and enabling the exchange of information between the neighbouring countries; 2l improving national, regional and local water practice; 3) creating an ambience to facilitate the ...
    ... Sandy-gravel sediments represent major aquifer systems. Their thickness varies from less than 10 m up to 50 m, but is generally of the order of 10 to 20 m. The transmissivity coefficient ranges from 10-s to I0 a m2 s 1. The semi- permeable or fu1ly-impermeable sandy clays often disconnect aquifer layers ...

  • Глаголи у кухињи и за столом

    Цветана Крстев, Биљана Лазић (2015)
    У раду је приказано истраживање лексике на српском језику кулинарског домена које се заснива на коришћењу доменског корпуса, електронских лексичких ресурса, пре свега WordNet-а и морфолошких речника, и локалних граматика. Приказане су доменске специфичности ових ресурса, како се користе, и међусобно употпуњују. Посебно је приказано како се коришћењем доменског корпуса могу екстраховати глаголи специфични за кулинарски домен и описати начини њиховог коришћења. Дат је попис глагола са основним подацима који је добијен применом представљених метода.
    аутоматска обрада, коначни трансдуктори, електронски речници, семантичке мреже, локалне граматике, кулинарство
    ... Mladen Stanojević. Српски језик у дигиталном добу -- The Serbian Language in the Digital Age, Springer, in “META-NET White Paper Series”, Georg Rehm and Hans Uszkoreit (Series Editors). 2. ВУЈИЧИЋ СТАНКОВИЋ И ПАЈИЋ 2014: Сташа Вујичић Станковић и Весна Пајић “Формирање доменског корпуса – кулинарска ...
    ... број таквих сајтова постоји и у Србији: Рецепти, Домаћи рецепти, Кувај сам1 и многи други. Осим тога, многе ТВ емисије у свету и у Србији посвећене су рецептима, кувању и здравој исхрани. И поред тога, ни издавање популарних часописа, кувара и других приручника не јењава: 100 до 150 таквих књига ...
    ... по укусу, полагано, полако, постепено, потпуно, сасвим, светло, свеже, ситно, тако, танко, топло, хладно, чврсто време 19 за то време, затим, још, на крају, након тога, одмах, онда, поново, потом, повремено, пред крај, претходно, прво, раније, стално, сутрадан, тада, увек, често Табела 5 Прилози ...

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • Influence of DEM resolution on numerical modelling of debris flows in RAMMS - Selanac case study

    Jelka Krušić, Biljana Abolmasov, Mileva Samardžić Petrović (2019)
    Debris flows induced by intensive rainfall represent very hazardous phenomena in many parts of the World. Methods for prediction of runout distance of flow like mass movements are different and depending on the input data, rheology, and available or appropriate numerical solution. However, sometimes it is not easy to obtain pre event and post event high-resolution data in the rural or mountainous area. Thus, the topology of terrain is the most important input parameter for the every real case ...
    tecišta, modeliranje, RAMMS, DEM
    ... also made instabilities in the Selanačka river valley. Generally it is necessary for further research to testing model with influence of the torrential flood on the deposition zone in the same time as Selanac debris flow. Also it is supposed that using some type of 2-phase numerical models potentially ...
    ... belongs to Jurassic ophiolites, while transportation and deposition area belongs to tectonic contact of Triassic limestones and magmatic rocks with Palaeozoic metamorphic rocks. Debris flow material is highly heterogeneous in lithological composition, as well as grain size distribution (up to m 3 ...
    ... al.– Influence of DEM resolution to numerical modelling of debris flows in RAMMS 2 𝑆𝑔𝑦 − 𝑆𝑓𝑦 = 𝜕𝑡 (𝐻 𝑈𝑦) + 𝜕𝑥 (𝐻 𝑈𝑥𝑈𝑦 ) + 𝜕𝑦 (𝑐𝑦𝐻 𝑈𝑦2 + 𝑔𝑧𝑘𝑎𝑝 𝐻22 ) (3) where the earth pressure coefficient ka=p is normally set to 1 when running the standard Voellmy– ...

  • Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia

    Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)
    The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...
    tecišta, zadržavanje nanosa, RAMMS, validacija

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... Made from carbon-manganese steel, designed to withstand light to medium loads in non-corrosive environments (AISI 10XX or 15XX series steel). API Class K: Contains less carbon and significantly more nickel-molybdenum than Class C, designed to handle light to medium loads in non-corrosive environments ...
    ... equipment and reducing maintenance time. The option to choose different materials for the moving and stationary parts of the pump, along with a variety of design solutions, makes this type of pump adaptable to different exploitation conditions. Compared to tubing pumps, the piston and cylinder ...
    ... deep wells or wells with very high loads. Class D is made to withstand medium to very heavy loads in non-corrosive (inhibited) conditions and is further categorized by quality: D-carbon, D-alloy, D-special (AISI 10XX, 15XX, or 41XX series steel). Non-API High Strength Rods: Contain more nickel ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • 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 polynomials

  • Palinomorfe sa lokaliteta Gostuška reka (Stara planina)

    Ivan Rutović (2024)
    U radu su prikazani rezultati palinološkog istraživanja permsko-trijaskih sedimenata sa lokaliteta Gostuška reka. Palinološki kompleksi su detaljno analizirani, što je omogućilo morfološku, taksonomsku i paleoekološku identifikaciju palinomorfi. Istraživanje je pokazalo prisustvo velikog broja spora i polena golosemenica, dok je polen skrivenosemenica zastupljen u manjem procentu. Na osnovu paleoekoloških analiza, zaključeno je da je tokom formiranja sedimenata na lokalitetu vladala aridna klima, sa povremenim vlažnim fazama koje su omogućavale razvoj močvarne vegetacije.
    palinomorfe, paleoekologija, perm - trijas, Stara planina, Gostuška reka
    ... Naime, asocijacije palinomorfi koje se nalaze u Jednom sloju ne moraju nužno predstavljati vegetaciju koja je u to vreme obitavala u neposrednoj blizini (Milivojević, 2001). Iz tog razloga, elementi koji čine ove asocijacije često imaju različite ekološke karakteristike, što može dovesti do pogrešnih ...
    ... Beijing. 249 p. Garcta-Avila, M., Mercedes-Martinb, R., Juncala, M.A. & and Dieza, J.B. 2020. Some aspects of current State of Knowledge on Triassic series on both sides of the Central Atlantic Margin / Quelques aspects de I'ćtat des connaissances des sćries triasiques de part et d'autre de la Marge ...
    ... Vol. 31, p.p.575-683. Zou — Qi, L., 1978: Acta botanica sinica. The spore — pollen assemblage of Shezhe formation formation of Yipinglang coal series in Luquan of Yunnan and its stratigraphical significane (continued)., vol. 20, str. 362 — 372. 38 TABLE1-4 TABLE | - 4 Tabla 1 Endosporites ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... 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 ...

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    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 ...
    debris flow, modelling, SPH code, DEM
    ... 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 ...

  • 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 / ...

  • 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 ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... 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 ...

  • Definition of Circulation Conditions and Groundwater Genesis of the Complex Krupaja Hydrogeological Karst System (Eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Tina Dašić (2023)
    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 ...

  • Energetska tranzicija u domaćinstvima: analiza usaglašenosti Srbije sa paketom „Čista energija za sve Evropljane“ / Energy Transition in Households: Analysis of Serbia’s Compliance with the „Clean Energy for All Europeans“ Package

    Boban Pavlović, Aleksandar Madžarević, Dejan Ivezić, Marija Živković, Dušan Mojić (2024)
    Zahvaljujući svojoj složenosti i heterogenosti, sektor domaćinstva predstavlja neizostavnu tačku u politikama energetske tranzicije. U Evropskoj uniji, potrošnja energije u domaćinstvima čini oko 26% finalne potrošnje energije, dok u Srbiji ovaj sektor ima najveći udeo u finalnoj potrošnji, što čini oko trećinu finalne potrošnje. Primenom mera energetske efikasnosti moguće je ostvariti značajne energetske uštede, što zajedno sa smanjenjem i supstitucijom upotrebe fosilnih goriva vodi manjem doprinosu klimatskim promenama i značajnom smanjenju zagađenja vazduha. Paket zakonskih mera “Čista energija za ...
    energetska tranzicija, paket čiste energije, regulatorni okvir, energetska politika, domaćinstva, srbija

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    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 ...

  • 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 drugs

  • 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)
    Polimeri i plastika, opšta hemija
    ... (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 ...

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    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 ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... 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 ...