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Упит dcterms_subject_txt:Severity of failure assessment

2845 items

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... ; Koltun, P. Cradle to gate assessment of environmental impact of rare earth metals. In Proceedings of the 7th Australasian Life cycle assessment Conference, Melbourne, Australia, 9-10 March 2011. P.615) [17] Ganguli, R. and Cook, D.R., 2018. Rare earths: A review of the landscape. MARS Energy ...
    ... A detailed assessment of global rare ecearth element resources: opportunities . and challenges. Economic Geology, 110(8), p.1925-1952 [88] Paulick, H. and Machacek, E., 2017. The global rare earth element exploration boom: An analysis of resources outside of China and discussion of development ...
    ... practices, Australasian Institute of Mining and Metallurgy, p. 47-80. [80] Castor, S.B. and Hedrick, J.B., 2006. Rare earth elements. fndustrial minerals and rocks, 7, p.769-792. 83 [81] Assessment, G.M.R., 2010. Geology and Undiscovered Resource Assessment of the Potash-Bearing Central Asia ...

  • Influence of paleoenvironmental conditions on distribution and relative abundance of saturated and aromatic hydrocarbons in sediments from the NW part of the Toplica basin, Serbia

    Nikola Burazer, Aleksandra Šajnović, Nebojša Vasić, Milica Kašanin-Grubin, Dragana Životić, João Graciano Mendonça Filho, Predrag Vulić, Branimir Jovančićević (2020)
    Stratigraphy,Economic Geology,Geology,Geophysics,Oceanography

  • Geonasleđe Golije i Peštera

    Ljiljana V. Grujičić-Tešić (2017-09-01)
    Sprovedena istraživanja u ovoj studiji obuhvatila su izdvajanje, opis, evaluaciju i valorizaciju objekata geonasleđa u cilju razvoja istraživane oblasti sa stanovišta geonauka, geoturizma i geoekologije. Na izučavanom području objekti geonasleđa su evidentirani, interpretirani, vrednovani i kategorisani, dat je predlog promocije geoobjekata, i na kraju predložena dopuna inventara objekata geonasleđa Srbije.U protekle četiri godine, na kompleksu geotopa Golije i Peštera istražena su geološka svojstva stena (tip stene, starost, fosilni sadržaj, morfološke i hidrogeološke karakteristike itd.), na osnovu čega je bilo ...
    geodivezitet, geonasleđe, geoturizam, geokonzervacija, Golija, Pešter
    ... Giusti (2005): Methodological proposal for the assessment of the scientific quality of geomorphosites. Italian Journal of Quaternary Science. Italia. 18 (1). pp.307 - 313. Ljiljana V. Grujičić - Tešić Doktorska disertacilja GEONASLEĐE GOLIJE I PEŠTERA 162 Cvetković, V., Prelević ...
    ... approach to national estate assessment of geodiversity. 1997 Technical series. No. 2. Australian heritage commission & Environment forest taskforce. Environment Australia. Canberra. Eder W (1999): UNESCO geoparks - A new initiative for protection and sustainable development of the Earth´s heritage. N ...
    ... natturalles 2008. Ukrainian Academy of Sciences. Institute of Geological Sciences. Kiev. Ukraine. 135. iss. 44. pp. 85 - 109. Pereira, P., Pereira, D., Caetano Alves, M. I. 2007: Geomorphosite assessment in Montesinho Natural Park (Portugal). Geographica Helvetica. Basel: 62. Pralong, J. P. (2005) ...

  • Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“

    Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић (2024)
    Prizma, REASONING, Rudnik, jalovina, Fond za nauku Republike Srbije

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • 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
    ... tion of the approach based on the analysis of depositional environments ensures a  much better insight into the spatial distribution of source, reservoir and seal rocks, which could results  in more correct assessment of hydrocarbon reserves. Furthermore, such an approach to  interpretation  of geol ...
    ... s  of the shape and characteristics of curves of gamma ray  (GR) and specific resistivity  (RT)  logs.   Funnel  shape of  the GR  log points  to  the  reduction  in  the basin water  level and  the  increase  in  the  level of  depositional energy, which leads to the reduction in the content of sha ...
    ... inconsistencies  in the selection of markers  in designation and correla‐ tion of hydrocarbon reservoirs, this approach has  led to  incorrect assessments of oil and gas reserves,  confusion in the interpretation of hydrodynamic measurements and reduced efficiency in the process of  reservoir management. As ...

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... input, peer assessment etc. These additional options require some basic programing in Python. All these types of task work with edX tags which annotate the type of content: a question, a response, a possible response and etc. Also there are possibilities for customizing the weight of each problem ...
    ... PLATFORM MARIJA RADOJIČIĆ University of Belgrade, Faculty of Mining and Geology, marija.radojicic@rgf.bg.ac.rs IVAN OBRADOVIĆ University of Belgrade, Faculty of Mining and Geology, ivan.obradovic@rgf.bg.ac.rs RANKA STANKOVIĆ University of Belgrade, Faculty of Mining and Geology, ranka.stankovic@rgf ...
    ... clear structure of course material, which is in line with the didactic principle of systematization and gradualism in the teaching process. Didactical principle of awareness within the teaching process is represented through the tasks, where activity of users and some kind of interaction between ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... sense of succes, drowsiness, satisfaction and excitement. New posts were then tested on the frequency of indexed terms in order to determine the mood of the author who wrote them. Results were compared with human assessment of the same posts and it was concluded that the machine assesses the mood of the ...
    ... affects the sentiment (by intuition, negative one). The disadvantage of this option is that we can not be sure that the absence of determiners really bears (negative) meaning, and the assessment of value is also difficult task. An additional problem is that the message may contain a determiner that was ...
    ... new attribute values. Value attribute is calculated as the quotient of the sums of products of attributes v and c of both elements and the total number of their repetitions (2.4). Repetitions attribute is equals the total number of their repetitions (2.5). v = v1 ∗ c1 + v2 ∗ c2 c1 + c2 (4) c = c1 ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling

    Branislav Petrović, Veljko Marinović, Zoran Stevanović (2023)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • 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
    ... Projections, Scientific Study; Faculty of Mining and Geology, Belgrade University: Belgrade, Serbia, 2017; unpublished. 27. Milenić, D.; Vranješ, A.; Krunić, O. Preliminary Assessment of the Balneological Potential of the Territory of AP Vojvodina. In Proceedings of the 17th Serbian Geological Congress ...
    ... Sebess, Z.L.; Rotár, S.Á.; Gulyás, Á.; Markovic, T. New methods of geothermal potential assessment in the Pannonian basin. Neth. J. Geosci. 2020, 98, e10. [CrossRef] 22. Lenkey, L.; Dövényi, P.; Horváth, F.; Cloetingh, S.A.P.L. Geothermics of the Pannonian basin and its bearing on the neotectonics. EGU ...
    ... Resources in Spa Areas of Serbia: Main Properties and Possible Improvement of Use. Therm. Sci. 2012, 16, 21–30. [CrossRef] 13. Republic Agency for Spatial Planning of the Republic of Serbia. Spatial Plan of the Republic of Serbia 2010–2020; Official Gazette of the Republic of Serbia no. 88/10; Republic ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... ation of land reclamation stages based on succession characteristics of rehabilitated vegetation in the Pingshuo opencast coal mine." Journal of Environmental Management 305 2022: 114352. https://doi.org/10.1016/J.jenvman.2021.114352 Yu, Xueyi, Chi Mu, and Dongdong Zhang. "Assessment of land r ...
    ... 2). The subject of our research is the surface mine Drmno viewed as a training: ground for experimental analysis of the choice of the type of reclamation and the appropriate arrangement of the landscape. Such process modeling of the unified reclamation system foresees a total of 10 alternative p ...
    ... thickness of bulk overburden material is 40-50 m. The area belongs to “Drmno” open pit is in the eastern part of the Kostolac coal basin, 1.e., east of the Mlava River. (Figure 1) igure 1. Location of study area - Drmno The Kostolac mining and energy basin is part of the municipality of Kostolac ...

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... on the genesis of the soil and on the level of contamination. The trace metal levels in the examined sediments are presented in Table S-IV. For a preli- minary risk assessment, the contents of metals were compared with Dutch recom- mendations and Serbian regulations of limit values of pollutant substances ...
    ... are given in Table S-I. For a preliminary assessment, a comparison with literature data is useful. The average TOC values for natural water systems were reported as follows: in common ground waters – around 0.7 mg L–1; in ground waters with high amounts of humic substances – 6 to 15 mg L–1; in sea ...
    ... Bor, University of Belgrade, Serbia, 5Laboratory for Environmental Research, University of Nova Gorica, Slovenia, 6Faculty of Science, University of Novi Sad, Serbia, 7Faculty of Science and Mathematics, University of Niš, Serbia, 8Faculty of Science and Mathematics, University of Kragujevac, Serbia ...

  • Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима

    Radiša D. Đurić (2016-05-30)
    Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...
    управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозер
    ... es and optimization of life cycle costs. Maintenance related to availability is upgrade of reliability concept. As maintenance related to reliability, this paper describes a mathematical relation which is developed to estimate the occurrence of track mechanism failure in function on the mineral ...
    ... production costs of the overburden excavation system caused by rubber belt failure. Eksploatacja i Niezawodnosc – Maintenance and Reliability; 14(4): 333-341 Tanasijevic, M., Bugaric, U., Jovancic, P., Ignjatovic, D., Polovina, D., 2012. Relationship between the reliability and the length of conveyor rubber ...
    ... bucket wheel excavator revitalization, Journal of Scientific & Industrial Research, 70(1), 13-19 Tanasijević, M., Ivezić, D., Jovančić, P., Ignjatović, D., Bugarić, U., 2013. Dependability assessment of open-pit mines equipment – study on the bases of fuzzy algebra rules, Eksploatacja i Niezawodnosc ...

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... in patients with renal failure is well documented [16,17]. It has been proposed (with some controversy) as a cofactor in the pathogenesis of Alzheimer"s disease, as well as other neurodegenera– tive pathologies. Accumulated aluminium accelerates process of aggregation of amiloyd beta peptide ...
    ... highest activation of pepsin activity by 191% in the presence of 25 ag AP?/ mL of reaction mixture [25]. As the mechanism of Al'* ions on pepsin activity is not still clear, the objective of this study is to investigate the m oitro influence of different concen- trations of AL'* ions, physiological ...
    ... Activation of pepsin by Al * ions; The intercepts on the abscissa of the primary plot of [Hb]/V against reciprocal of activator concentrations provide the values of Aso used to obtain the plots of 1/Aso against vo/V shown in the inset. B, curve 2) contain characteristic bands of haemo- globin ...

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • The external aggregation Newton's method for solving nonlinear equations and applications

    Marija Paunović, Dejan Ćebić, Nebojša Ralević (2020)
    Њутнов метод, агрегациона функција, ред конвергенције

  • Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine

    Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina (2015)
    ... PK "Nepričava" - Lajkovac. Beograd: Rudarsko-geološki fakultet Univerziteta u Beogradu. 9 TRAJKOVIĆ, S., LUTOVAC, S. and RAVILIĆ, M. (2013) Assessment of impact on environment and constructed facilities owing to blasting at open pit mine "Nepričava". Underground Mining Engineering, 22, pp. 33-48 ...
    ... effect of elastic seismic wave is movement of particles of the rock mass from its equilibrium position. Such oscillation of the rock mass particles is manifested as a shock and represents one of the negative effects of blasting. In order both to evaluate and control the seismic effect of blasting ...
    ... velocity of the rock mass and basic parameters affecting its magnitude, being: the amount of explosive, the distance from the blast site, characteristics of the rock mass and the type of blasting, it is the equation of M. A. Sadovski that is used most commonly. In this paper, the law of Sadovsky ...

  • An Approach to Development of Bilingual Lexical Resources

    Stanković Ranka, Obradović Ivan, Trtovac Aleksandra (2012)
    ... an “as is” basis. But even the development of SrpWN is restricted to a certain extent by the fact that Serbian synsets have to be linked to corresponding English synsets by the interlingual index (ILI) [Tufiş, 2004]. Another reason is the assessment that a bilingual resource in tune with Bibliša’s ...
    ... University of Belgrade Faculty of Mining and Geology Đušina 7, Belgrade Serbia +381 11 3219 148 ranka@rgf.bg.ac.rs Ivan Obradović University of Belgrade Faculty of Mining and Geology Đušina 7, Belgrade Serbia +381 11 3219 259 ivano@rgf.bg.ac.rs Aleksandra Trtovac University of Belgrade ...
    ... . The fourth section outlines the usage of the system with examples illustrating the development of Biblimir. 2. SYSTEM ARCHITECTURE Bibliša is a complex system composed of several modules. Targeted at textual resources in the form of collections of TMX documents and the corresponding metadata ...