Претрага

Упит dcterms_subject_txt:Water Science and Technology,Aquatic Science,Geography

2388 items

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем
    ... d data and to make a progress in the participants capability, to the appropriate levels. Surveys and organizations are encouraged to work together, to develop and implement the required interchange standards, for their data to be interoperable. This can be achieved by using GML (Geography Mark-up ...
    ... ted data and to make a progress in the participants capability, to the appropriate levels. Surveys and organizations are encouraged to work together, to develop and implement the required interchange standards, for their data to be interoperable. This can be achieved by using GML (Geography Mark-up Language) ...
    ... Faculty of Mining and Geology and the Ministry of Natural Resources, Mining and Spatial Planning, have joined the international Project OneGeology Europe in May, 2013, while the project development had already been at an advanced stage. By the end of 2013, all the obligations envisaged and actions that ...

  • 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
    ... elements, and as a non-regulatory ion can be toxic to many organisms. Even itis a most abundant metal, comprising almost 8% of the earth”s crust; its concentration in living system is very low. Aluminium can occur in a number of different forms in water, and his chemistry in water solutions ...
    ... 152 nm and with a sample flow rate of 1 mL min '. Integration times were 1 per increment (.e., analysis time of 1 minute per sample). UYV absorbance measurements 'wV absorbance measurements of pepsin and haemo- globin samples, both in the absence and in the presence of ALP* (water solutions ...
    ... carried out at 37"C. IR studies Pepsin-AP*' and haemoglobin-AP? | samples were lyophilized and used for the further experiments. "The removal of any traces of water from the samples was insured by drying samples over silica gel over night and heating during 2 hours at 100%C. For infrared ...

  • Investigation of accessory elements of representative petrologic radioactivity carriers at Stara Planina, Serbia

    Boris Vakanjac, Ivana Jelic, Milena Rikalovic, Vesna Ristic-Vakanjac, Dusan Nikezic, Zorana Naunovic, Slavko Dimovic (2019)
    Ова студија се бави обиљем најчешћих акцесорних елемената носилаца радиоактивности на Старој планини на четири дефинисане локације. Све истраживане локације имају повећану радиоактивност, већу од 200 цпс, до 1250 цпс. У свим испитиваним узорцима детектовани су следећи елементи и одређене њихове концентрације: Зр, Рб, В, Мо, Сн, Зн, Цу, Ас, Сб, Ба, Ни, Цр, В и Ти. Анализа је показала да су у зависности од узорка утврђене повишене концентрације свих детектованих елемената осим титана. Како се сви локалитети који ...
    ацесорни елемент, радиоактивност, токсичност, биохазард, животна средина

  • Анализа одрона у стенским косинама: савремени приступи

    Милош Марјановић (2023)
    У Србији и региону познате су бројне појаве одрона које су изазвале велике застоје саобраћаја, материјалне штете или чак имале фаталне исходе, па их је потребно непрестано пратити и изучавати. Mодeловањe одрона скопчано је са ниским нивоом поузданости, али савремене технологије омогућавају да сe такви изгледи донекле побољшају. Једна од технологија која чини искорак утом правцу јe LiDAR-ско скенирање, које обезбеђује детаљне топографске подлоге у виду облака тачака високе резолуције и тачности. Поступак анализе одрона може се свести на: ...
    одрони, осматрање, LiDAR, облак тачака, моделовање

  • Assessment of environmental radioactivity and health hazard at Stara Planina region

    Slavko Dimovic, Boris Vakanjac, Ivana Jelic, Milena Rikalovic, Vesna Ristic-Vakanjac, Radoje Bankovic (2021)
    Циљ студије је био да се процени потенцијални ризик од зрачења у близини напуштених рудника уранијума, јаловишта или лежишта уранијума на Старој планини у Србији. За процену ризика одређено је неколико параметара: активност еквивалента радијума, Raeq, екстерни индекс опасности, Hex, брзина апсорбоване дозе гама зрачења, D, годишња ефективна доза на позадинској експозицији гама гама на отвореном, AEDoutdoor и ризик од рака током живота, ELCR. Добијени резултати су показали да сви узорци, осим једног, имају Raeq вредност и до два ...
    природна радиоактивност, животна средина, здравље, опасност, процена ризика

  • Application of the principle of circular economy to the thermal groundwater, the example of the municipality of Bogatić

    Marija Jovanović, Vesna Ristić Vakanjac (2021)
    There are about 360 locations of thermal and thermo-mineral waters in Serbia, whose water temperatures range from 14 to 98°C, which ranks Serbia as the richest European country in geothermal energy. The mentioned water resources (thermal and thermomineral waters) are used, mostly, for therapeutic purposes in spas and sports and recreational centers. The main problem that is present is the fact that they are not used in a rational and efficient way. The paper will give examples territorially related ...
    water-food-energy nexus, geothermal resources, groundwater management, sustainability, Bogatić

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • 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
    ... considering two phases, solid and liquid, i.e. a granular skeleton with voids filled with either water or mud. If the shear resistance of the fluid phase can be neglected, the stress tensor in the mixture can be decomposed into a ‘pore pressure’ and an effective stress, and the mechanical behavior of ...
    ... mixture—propagating along the slope and increasing due to bed entrainment—combined to the balance of linear momentum of pore water, B. the balance of linear momentum of the mixture, C. a kinetic relation between the deformation-rate tensor and velocity field, and SCG-XIII INTERNATIONAL SYMPOSIUM ...
    ... Generally, it consists of the discretization of the depth averaged Biot-Zienkiewicz equations (Zienkiewicz and Schiomi, 1984) and it can be used with a variety of rheological laws and pore water pressure treatments. Two different meshes will be used, one to describe the terrain topography while the ...

  • Business Models for Small-scale Biomass Projects Development

    Dejan Ivezić, Miodrag Gluščević, Marija Živković (2019)
    Biomass is recognized as the most promising renewable energy source in Serbia. The share of biomass in Serbian final energy consumption is over 10%, but mostly related to traditional use in stoves and ovens. One of the main obstacles for wider implementation of contemporary biomass facilities is the inexperience of consumers and stakeholders in the implementation of “innovative” business models, especially in the cases of small-scale projects. In this paper, three different business models (public utility company, energy cooperative ...
    ... biomass supplier and district heating system operator. Cooperative model is optimal framework for determination ideal ratio between fuel and heat prices, and adjustment of system profitability, because cooperative members are in the same time fuel sellers and heat energy consumers, and they also expect ...
    ... e fund. Cooperative would organize biomass collecting and woodchips production. Cooperative members and other forest owners in Kostojevići and surrounding settlements will provide biomass. In addition, cooperative would organize distribution and selling of heat. Cooperative model is optimal framework ...
    ... of Mining and Geology 2Standing Conference of Towns and Municipalities, Belgrade Abstract: Biomass is recognized as the most promising renewable energy source in Serbia. The share of biomass in Serbian final energy consumption is over 10%, but mostly related to traditional use in stoves and ovens. One ...

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa

    Mirjana V. Banković (2018-07-13)
    Profitabilna eksploatacija sve složenijih ležišta je težak zadatak koji zavisi odtemeljnog procesa analize, planiranja i projektovanja rudnika. Izvodljiv strateškiplan mora da zadovoljava društvena, regulatorna, tehnološka, geometrijska iekonomska ograničenja. Kako bi se postigao osnovni cilj, odnosno profitabilnost iodrživost rudarskog projekta na duži period, neophodno je unapređenjematematičkih modela i informatičke podrške procesima planiranja i optimizacijekoji će omogućiti efikasnu realizaciju ovih ciljeva...
    tehnološki model, integralni model, planiranje, optimizacija,utovarno-transportni sistem, neto sadašnja vrednost projekta
    ... UML vs. IDEF. School of Computing and Information Technology, Griffith University. 201 Osanloo, M., Gholamnejad, J., Karimi, B., 2008, Long-term open pit mine production planning: a review of models and algorithms. International Journal of Mining, Reclamation and Environment, 22 (1), 3-35. Pana ...
    ... Journal of the Southern African Institute of Mining and Metallurgy, 109 (3), 169-175. Sabour, S. A., Dimitrakopoulos, R., 2011, Incorporating geological and market uncertainties and operational flexibility into open pit mine design. Journal of Mining Science, 47 (2), 191-201. Salomons, W., 1995, Environmental ...
    ... optimization: grade uncertainty and risk effects in open-pit design. Mining Technology, 111 (1), 82-88. 196 Dorin, I., Diaconescu, C., Topor, D. I., 2014, The role of mining in national economies. International Journal of Academic Research in Accounting, Finance and Management Sciences, 4 (3), 155-160 ...

  • Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)

    Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)
    Paleontology, Stratigraphy, Ecology, Evolution, Behavior and Systematics

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... exploits the GUI (graphical user interface) technology available for MS Windows applications /Fig. 11/. It enables a straightforward and easy manipulation of input data and control over parts of the problem- solving process. It also offers suggestions and recommendations to the user which could ...
    ... stability, air current losses, climate conditions, gas state, fire risk and dangerous dust pollution risk. The solution of these problems relies to a great extent on numerical methods. With the development of computer technology these methods were incorporated as numerical routines in software ...
    ... facts and heuristics which can be represented by means of rules, frames, semantic networks and other formalisms. Since knowledge is the key factor in problem solution and decision making, the quality and usability of an expert system is basically determined by the accuracy and completeness ...

  • Optimizacija i planiranje površinskih kopova stohastičkim modelima

    Dejan R. Stevanović (2015-05-29)
    Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...
    površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.
    ... Making Tools for Surface Mining Equipment Selection, Mining Science and Technology, vol. 10, str. 323–335. Denby, B. and Schofield, D., 1994, Open pit design and scheduling by use of genetic algorithms. Transactions of the Institute of Mining and Metallurgy, Section A), Vol. 103, str.21-26. Dimitrakopoulos ...
    ... _ek.pdf Anderson, Herbert L. 1986, Metropolis, Monte Carlo and the MANIAC, Los Alamos Science vol.14, str. 96–108. Askari-Nasab, H, i Awauh-Offei, K, 2009, Open pit optimisation using discounted economic block values, Mining Technology, vol. 118, str. 1-12. Aykul H, Yalcın E, Ediz I.G, Dixon-Hardy ...
    ... annealing: pit limits, production schedules, multiple orebody scenarios and sensitivity analysis, Mining Technology, vol. 118, str. 80-91 Allen H, Aspects of evaulating mining projects, Imperial College of Since and Technology, London, UK, pristupljeno 05.06. 2013. god, dostupno na: http://www.maden ...

  • Optimizacija i planiranje površinskih kopova stohastičkim modelima

    Dejan R. Stevanović (2015-05-29)
    Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...
    površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.
    ... Making Tools for Surface Mining Equipment Selection, Mining Science and Technology, vol. 10, str. 323–335. Denby, B. and Schofield, D., 1994, Open pit design and scheduling by use of genetic algorithms. Transactions of the Institute of Mining and Metallurgy, Section A), Vol. 103, str.21-26. Dimitrakopoulos ...
    ... _ek.pdf Anderson, Herbert L. 1986, Metropolis, Monte Carlo and the MANIAC, Los Alamos Science vol.14, str. 96–108. Askari-Nasab, H, i Awauh-Offei, K, 2009, Open pit optimisation using discounted economic block values, Mining Technology, vol. 118, str. 1-12. Aykul H, Yalcın E, Ediz I.G, Dixon-Hardy ...
    ... annealing: pit limits, production schedules, multiple orebody scenarios and sensitivity analysis, Mining Technology, vol. 118, str. 80-91 Allen H, Aspects of evaulating mining projects, Imperial College of Since and Technology, London, UK, pristupljeno 05.06. 2013. god, dostupno na: http://www.maden ...

  • Developing Students’ Mining and Geology Vocabulary Through Flashcards and L1 in the CLIL Classroom

    Lidija Beko, Ivan Obradović, Ranka Stanković (2015)
    ... Beko, L. 2013. Content and Language Integrated Learning (CLIL) in Earth Science. PhD diss., University of Belgrade. Crick, Francis. 1979. Thinking about the brain. Scientific American 9: 218-232. Dalton-Puffer, Christiane, Tarja Nikula and Ute Smit. 2010. Language Use and Language Learning in ...
    ... vocabulary teaching and the use of L1 in the CLIL classroom, (2) review the literature on flashcards and discuss the use of it at home and in the classroom, (3) exemplify the complex mining and geology terminology and the difficulties the Serbian students face in terms of translation and comprehension ...
    ... scaffold language and content learning in CLIL contexts, as long as learning is maintained primarily through the L2” (p.17). The supporters of periodical usage of L1 in the CLIL classroom (Auerbach 1993; Littlewood and Yu 2011; Guk and Kellogg, 2007; Storch and Aldosari, 2010; Swain and Lapkin, 2000) ...

  • Analiza softvera za projektovanje ESP sistema

    Aleksandar Sredojević (2024)
    U momentu kada pritisak na dnu bušotine nije dovoljan da savlada ukupne gubitke pritisaka od dna bušotine do separatora, proizvodnja pomoću ležišne energije nije više moguća i bušotina prestaje sa eruptivnim radom. Kako bi ponovo omogućili proizvodnju fluida iz bušotine, potrebno je primeniti neke od mehaničkih metoda eksploatacije. Najprimenljivije mehaničke metode eksploatacije su: gas lift (GL), dubinske pumpe sa klipnim šipkama (SRP), električne uronjene centrifugalne pumpe (ESP), zavojne pumpe (PCP) i hidraulične pumpe (HP). Jadna od tih metoda koja ...
    električna centrifugalna pumpa (ESP), proizvodnja fluida, mehaničke metode eksploatacije, Prosper, Pipesim
    ... Petroleum Science and Engineering“ 136 (2015) 41—54; Hisham, B., M., Aman, A., (2017). „Investigate a Gas Well Performance Using Nodal Analysis“; Hofstatter, H., (2018). Oil and Gas Production Principls: 9th Lecture: Vertical Lift Performancee (VLP); L, Fetoui, „Productio Technology, ESP design ...
    ... električnih centrifugalnih pumpi“; Michael Golan, Curtis H. Whitson, (1991). „Well Performance Second Edition“, Norwegian University of science and Technology (NTNU); 76 Novičić Slobodan, (2010). „Efikasnost primene sistema potopljenih centrifugalnih pumpi na poljima NIS Naftagas-a“; Novomet ...
    ... URL: Productio Technology, ESP design (30.08.2024.); Jan Dirk Jansen, (2017). „Nodal Analysis of Oil and Gas Production Systems“, Society of Petroleum Engineers; Khakimyanov, M. 1., Khusainov, F. F. & Shafikov, I. N., (2016) „Electrical Submersible Pumps IN Oil Production and Their Efficiency ...

  • Palaeoflora of Kamenica (Pranjani Basin, western Serbia)

    Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević (2019)
    Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...
    макрофлора, млађи олигоцен, Прањански басен, Каменица
    ... suggestions and com- ments on our manuscript: deSa đOrđevIć-MILuTINOvIć (Natural history Museum of Belgrade) and other anony- mous reviewer. We also would like to thank LIdIja BeKO for review english text. This work was supported by grants from the Ministry of education, Science and Technologi- ...
    ... basin (the village of Kamenica) and it consists of well cemented conglomerates and breccias lying directly over the peridotite-serpentine rock. above them is a sequence of alternating sandstones, con- glomerates and marlstones. Well preserved remains of fossil plants and fish have been found in these sediments ...
    ... elements of temperate climate are very rare, and represented only by a few imprints of Betulaceae and ulmaceae. Based on the taxonomical composition of palaeo- phytoassociation and leaf morphology, it has been inferred that the climate was subtropical and humid during the existence of this plant association ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... the c and d samples, and the lowest water content is also found for these samples (measured by the lower intensity of the 3200 cm—! broad band). The 3400 cm-! component may arise from the clay-based matrix [45] being, more or less transformed by the firing. We can expect that the lowest water content ...
    ... The narrow O-H stretching,; modes at ~3670 cm-! (Figure 4) are very specific and fit well with asbestos. On the contrary, the broad O-H band peaking at ~3400 cm~! with a d shoulder at 3200 cm~! is assignable to water traces adsorbed at the pore surface, as observed for many ceramics. Materials ...
    ... on the cross-section. Details for the spectrum of sample a are given on the bottom (B). Materials 2020, 13, 3597 11 of 18 3.4. OH Groups, Water and Clays Modes characteristic of O-H vibrations are only detected in grain cores (Figure 9), which is ascribed the de-hydroxylation induced by the ...